This living body determination apparatus adds a living body determination function to an external apparatus that performs authentication. The living body determination apparatus is provided with: a light source that generates infrared light; a camera that captures an image of a subject with an optical axis different from that of the light source; and a controller that controls the light source and the camera. The controller detects the eye of the subject from the image captured by the camera, determines whether or not light is absorbed by the pupil of the eye of the subject, and determines that the subject is a living body if it is determined that the light is absorbed by the pupil of the eye of the subject.
A smartphone system for vehicle includes a key authentication device and a wireless charging device having a memory unit in which copy authentication information, which is authentication information for a copy of master authentication information held by a smartphone, is stored. The smartphone key system for vehicle selects and uses as the authentication information any of the master authentication information transmitted by wireless communication from the smartphone to a key authentication device and the copy authentication information stored in the memory unit, depending on a state of charging operation for the smartphone.
H02J 50/80 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique mettant en œuvre l’échange de données, concernant l’alimentation ou la distribution d’énergie électrique, entre les dispositifs de transmission et les dispositifs de réception
H02J 50/10 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique utilisant un couplage inductif
3.
DISTANCE MEASUREMENT DEVICE, DISTANCE CORRECTION METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM
A distance measurement device comprises an irradiation unit that irradiates a measurement light onto an object to be measured, a light receiving sensor that receives reflected light from the object to detect an exposure amount based on the reflected light, a memory unit that stores correction information indicating a correction formula set including a plurality of correction formulas and an applicable distance range of each correction formula, and a distance calculation unit that calculates the measurement distance to the object to be measured based on the exposure amount. The distance calculation unit performs, based on the correction information stored in the memory unit, a distance correction calculation to calculate a corrected measured distance by correcting the measured distance using the correction formula corresponding to the applicable distance range in which the measured distance is included among the plurality of correction formulas in the correction formula set.
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
G01S 7/4861 - Circuits pour la détection, d'échantillonnage, d'intégration ou de lecture des circuits
A head mounted display displays an image in the user's field of vision and includes a video display unit that generates the image to be displayed. A first waveguide and a second waveguide duplicate the video light from the video display unit. Each of the waveguides includes a pair of parallel main planes that confine video light by internal reflection. The first waveguide includes an incident surface that reflects video light into the inside and two or more outgoing reflective surfaces emit video light into the second waveguide. The second waveguide includes an input unit that couples video light from the first waveguide to the inside and an output unit that emits video light to the user's pupil, wherein the angle between the duplication direction of video light in the first waveguide and the duplication direction of video light in the second waveguide is less than 90°.
An article identification system includes a weight sensor, a distance sensor, and an article identification device including an information processing device. The information processing device calculates, based on weight measurement data detected by the weight sensor, a first item picked up position of a plurality of picked up estimated items and a degree of accuracy indicating a degree of correctness of the estimation of the picked up estimated items. The information processing device obtains a second item picked up position based on the distance data of the person obtained by the distance sensor. The information processing device calculates a correction certainty by correcting the certainty of the estimated picked up items based on the first item picked up position and the second item picked up position, and identifies the picked up items based on the correction certainty.
A face authentication terminal generates a first biometric secret key from a face image of a person captured at a first timing when the person is detected by at least one of a camera and a thermal sensor. The face authentication terminal generates a second biometric secret key from the face image of the person captured at a second timing different from the first timing, generates a biometric public key based on the second biometric secret key, and sends the biometric public key to an authentication server to request biometric public key registration. The authentication server verifies whether the authentication is successful or not using the first biometric secret key and the biometric public key sent to the authentication server, and when the authentication is verified to be successful, the biometric public key registration is completed.
H04L 9/32 - Dispositions pour les communications secrètes ou protégéesProtocoles réseaux de sécurité comprenant des moyens pour vérifier l'identité ou l'autorisation d'un utilisateur du système
A light guiding plate comprising: a substrate; an incidence diffraction grating for diffracting incident light; and an emission diffraction grating for emitting, from the substrate, light diffracted by the incidence diffraction grating. The emission diffraction grating has a mesh-like grating pattern formed on the substrate. The mesh-like grating pattern is formed from a first parallel straight line group and a second parallel straight line group intersecting the first parallel straight line group. The pitch of the first parallel straight line group and the pitch of the second parallel straight line group are equal. Between the incidence diffraction grating and the mesh-like grating pattern, a line region is provided that consists only of the first parallel straight line group or the second parallel straight line group.
A wireless charging device includes a plurality of elemental parts including a switch part and a conductor connecting between the adjacent elemental parts, and a coil forming part applied to a charging surface on which a charging target is placed. The control unit controls the switch part to form, on the charging surface, a coil including the switch part in an ON state and the conductor in a conducting state that allows current to flow that form a coil-shaped current path.
H02J 50/90 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique mettant en œuvre la détection ou l'optimisation de la position, p. ex. de l'alignement
H02J 50/10 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique utilisant un couplage inductif
An image display element includes an incident diffraction grating which diffracts incident light, and an outgoing diffraction grating from which light that has propagated through the light guide plate after being diffracted by the incident diffraction grating is emitted, the incident diffraction grating and the outgoing diffraction grating being each formed by a pattern of concave-convex formed on a surface of the light guide plate, and the image display element being obtained by joining the light guide plate and a cover glass protecting the pattern of concave-convex or two or more light guide plates with an air layer therebetween by a holding member, and being configured such that the light guide plate and the cover glass are formed by a plastic material, and the holding member has an air vent through which air in the air layer and outside air communicate.
A battery stand is configured to output an electric power stored in a battery to the outside when the battery is placed on a mounting part. A slit hole is formed on the top surface of the battery stand through which a slider is inserted and through which a movement range of the slider is regulated. The battery stand is linked to the movement of the slider and is equipped with a holding mechanism to secure the battery. The battery stand is equipped with a shielding member that shields the slit hole. The shielding member is attached to the slider and moves with the slider while maintaining the slit hole shielded.
A head-mounted display achieves both miniaturization and high efficiency of an optical system and expansion of an eye box. In order to achieve the above-described object, a head-mounted display that displays an image within a visual field of a user is provided. The head-mounted display includes: an image display unit that generates an image to be displayed; a projection unit that projects image light from the image display unit; an image rotation and replication unit that expands an eye box of projection light from the projection unit; and a waveguide unit that transmits image light from the image rotation and replication unit to a pupil of the user. The image rotation and replication unit includes an incidence surface, an emission surface, and at least two reflection surfaces, and an angle formed by the incidence surface and the emission surface is greater than 90°.
A wireless charging device includes a power transmitting coil that performs power transmission to a power receiving device including a power receiving coil by wireless power transmission. A power transmitting control unit is configured to acquire a temperature of a secondary battery of a charging target that is transmitted from the power receiving device through a communication unit that receives data from the power receiving device and perform quick charging with first transmission power until the temperature of the secondary battery reaches an upper limit temperature, and perform weak charging with transmission power that is lower than transmission power for maintaining the temperature of the secondary battery not to be higher than the upper limit temperature and is lower than the first transmission power of which a charging state is uninterrupted when the temperature of the secondary battery reaches the upper limit temperature.
H02J 50/80 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique mettant en œuvre l’échange de données, concernant l’alimentation ou la distribution d’énergie électrique, entre les dispositifs de transmission et les dispositifs de réception
H02J 50/10 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique utilisant un couplage inductif
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
13.
DISTANCE MEASURING APPARATUS, DISTANCE MEASURING PROGRAM
An objective of the present disclosure is to easily and precisely correct a distance error caused by multipath phenomenon in a distance measuring apparatus using TOF method. A distance measuring apparatus according to the present disclosure identifies an equation of plane that approximates a plane in a space where a target object exists, compares the equation of plane with a measured distance of the place, thereby calculating a correcting value for correcting a measured distance.
G01S 7/4865 - Mesure du temps de retard, p. ex. mesure du temps de vol ou de l'heure d'arrivée ou détermination de la position exacte d'un pic
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
G01S 17/89 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour la cartographie ou l'imagerie
Provided is an illumination optical unit configured to illuminate an image display unit configured to display an image. The illumination optical unit includes: a light source configured to emit light; a lens unit configured to convert divergent light from the light source into approximately collimated light; and a light branching unit to which the light emitted from the lens unit is incident, and which branches an optical path into an optical path of illumination light propagating to the image display unit, and an optical path along which light from the image display unit propagates to a projection side. The light branching unit includes two or more emission/reflection planes configured to emit the illumination light.
The head-mounted display includes: an image display unit that generates an image to be displayed; and a first light guide plate and a second light guide plate which duplicate image light from the image display unit. Each of the first light guide plate and the second light guide plate includes a set of parallel main surfaces confining the image light with internal reflection, the first light guide plate includes an incident plane that reflects the image light to an inner side, and two or more emission/reflection planes from which the image light is emitted to the second light guide plate, the second light guide plate includes an input part that couples the image light transmitted from the first light guide plate to the inner side, and an output part from which the image light is emitted to a user's pupil.
A distance measurement system according to the invention includes a processor, a distance measurement device, and a heat detection device. In the distance measurement system, the distance measurement device can measure a distance to a subject and can generate a distance image related to the subject whose distance has been measured. The heat detection device can measure the temperature of the subject and can generate a temperature image related to the subject whose temperature has been measured. The processor can associate the distance image and the temperature image acquired from the same point of view and determine whether or not the subject is an object on the basis of a distance value and a temperature value at the same position in the images.
A distance measurement system includes a distance measurement device and an external processing device. Here, the distance measurement device receives reflected light from a subject for a plurality of exposure periods in a frame in which irradiation light is emitted, switches a plurality of distance calculation expressions according to an amount of charge measured for each exposure period, and calculates a measured distance to the subject from the amount of charge measured for each exposure period. The external processing device acquires the measured distance from the distance measurement device and performs data processing. Then, the external processing device predicts a measured distance including a distance error caused by an influence of multipath. The external processing device generates a correction expression for correcting the measured distance. The external processing device corrects the measured distance acquired from the distance measurement device using the correction expression.
G01S 17/894 - Imagerie 3D avec mesure simultanée du temps de vol sur une matrice 2D de pixels récepteurs, p. ex. caméras à temps de vol ou lidar flash
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
18.
IMAGE DISPLAY ELEMENT, IMAGE DISPLAY DEVICE, AND IMAGE DISPLAY METHOD
To improve brightness of image information visually recognized by a user while using plastic for a light guide plate. An image display element includes: a substrate made of resin; an incident diffraction grating that diffracts incident light; and an exit diffraction grating that emits the light, the incident diffraction grating being formed on a first surface of the substrate, the exit diffraction grating being formed on a second surface on a side opposite to the first surface of the substrate, and the exit diffraction grating being formed on one surface.
To improve luminance of image information visually recognized by a user while using plastic for a light guide plate. An image display element includes: a plastic substrate; an incident diffraction grating integrally formed on a surface of the plastic substrate and configured to diffract incident video light; an emission diffraction grating integrally formed on a surface of the plastic substrate and configured to emit the video light; and a coating layer formed on the emission diffraction grating and having a thickness of 10 nm or more and 1000 nm or less and a refractive index of 1.64 or more and 2.42 or less.
The invention provides a face authentication system robust to the individual differences in the face parts or changes in the face orientation when an individual is identified by using a face image in a state of wearing a wearable item. The face authentication system according to the invention identifies an individual by using a synthesized image obtained by deforming a wearable item image to fit a face shape of the individual.
According to the invention, a light guide plate-type video display device and a video display system that are capable of displaying a video with less color deviation and less video distortion are provided. A video display device 101 configured to display a video includes a video projection unit 200 configured to project video light, a video deflection unit 210, and a light guide portion 230. The video deflection unit 210 deflects video light emitted by the video projection unit 200 and causes the video light to propagate to the light guide portion 230, and the light guide portion 230 causes the entered video light to propagate therein and outputs the video light. Here, the video deflection unit 210 or the light guide portion 230 is configured to reduce color dispersion of the video light outputted from the light guide portion 230.
Provided are a TOF apparatus, a TOF system, and an installation status notification method that can automatically determine the quality of installation and reduce the loss of performing re-construction work. The TOF apparatus includes a processor. The processor executes an anomaly determination program, which is a program used to determine whether the installation state is normal or anomaly. By executing the anomaly determination program, the processor determines whether the installed state is normal or anomaly based on at least one of the viewpoints of the installation angle, the influence of interference, the field of view, and the measurement distance, and notifies the determination result.
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
G01S 17/894 - Imagerie 3D avec mesure simultanée du temps de vol sur une matrice 2D de pixels récepteurs, p. ex. caméras à temps de vol ou lidar flash
G01S 7/4865 - Mesure du temps de retard, p. ex. mesure du temps de vol ou de l'heure d'arrivée ou détermination de la position exacte d'un pic
The distance measurement system is a system for measuring a distance to a target by a time of flight of light using a plurality of distance measurement image pickup apparatuses. The plurality of distance measurement image pickup apparatuses emits pulsed light at different intervals having a relatively prime relationship. Further, an interval of pulsed light rays is set based on any one of (1) a value obtained by raising a prime number to a power of a natural number of 2 or more used as an exponent, (2) a value obtained by multiplying a prime number by a natural number of 2 or more used as an integer, and (3) a value obtained by multiplying the value obtained by raising the prime number to the power by a natural number of 2 or more used as an integer.
G01S 7/4865 - Mesure du temps de retard, p. ex. mesure du temps de vol ou de l'heure d'arrivée ou détermination de la position exacte d'un pic
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
G01S 7/4863 - Réseaux des détecteurs, p. ex. portes de transfert de charge
The distance measurement system is a system for measuring a distance to a target by a time of flight of light using a plurality of distance measurement image pickup apparatuses. The plurality of distance measurement image pickup apparatuses may emit pulsed light rays at a plurality of different pulse widths. Further, intervals of pulsed light rays from the plurality of distance measurement image pickup apparatuses are set to be proportional to pulse widths in the respective distance measurement image pickup apparatuses. Further, the respective distance measurement image pickup apparatuses emit pulsed light rays at intervals of the pulsed light rays corresponding to pulse widths and the intervals of the pulsed light rays different from each other.
G01S 7/4865 - Mesure du temps de retard, p. ex. mesure du temps de vol ou de l'heure d'arrivée ou détermination de la position exacte d'un pic
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
G01S 7/48 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
25.
DISTANCE MEASUREMENT DEVICE AND CONTROL METHOD OF SAME
In a distance measurement device that measures a distance to an object based on a time of flight taken until irradiation light is reflected by the object and returns to the distance measurement device, a brightness measurement unit measures an exposed electric charge amount as a brightness while a shift amount of an exposure gate is changed by an exposure gate shift control unit, and a light emission and exposure timing of another distance measurement device is set to a shift amount of the exposure gate where the brightness is maximized. The brightness measurement unit calculates a variation in the brightness of the exposed electric charge amount while the cycle of the exposure gate is changed, and it is determined that ½ of a value of the cycle of the exposure gate when the variation is minimized is a light emission cycle of the another distance measurement device.
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
G01S 7/481 - Caractéristiques de structure, p. ex. agencements d'éléments optiques
G01S 7/4865 - Mesure du temps de retard, p. ex. mesure du temps de vol ou de l'heure d'arrivée ou détermination de la position exacte d'un pic
26.
OPTICAL UNIT AND HEAD-MOUNTED DISPLAY DEVICE USING THE SAME
An optical unit of a head-mounted display device includes: a light-emitting unit configured to condense light emitted from a light source; a display unit configured to generate image light by using the light condensed in the light-emitting unit as illumination light; a projection lens configured to project the image light transmitted from the display unit; an optical axis conversion element configured to displace an optical axis of the image light projected from the projection lens; and a light-guide plate configured to receive the image light of which the optical axis is displaced by the optical axis conversion element, and to guide the image light to a wearer's pupil.
G02B 26/08 - Dispositifs ou dispositions optiques pour la commande de la lumière utilisant des éléments optiques mobiles ou déformables pour commander la direction de la lumière
G02B 27/28 - Systèmes ou appareils optiques non prévus dans aucun des groupes , pour polariser
The purpose of the present invention is to provide a head-mounted display, and a method for controlling same, with which it is possible to keep the color tone of an output image constant in consideration of changes in color due to differences in light emission intensity in each RGB wavelength band when varying brightness in accordance not only with the effect of exterior light, but also with the effect inside a device or the illuminance of the external light. In order to achieve this purpose, the present invention is a head-mounted display device having a control device and a display device, wherein: the display device has a display unit that has a light source and that outputs image light and displays an image, a drive unit that outputs a video signal to the display unit and drives the light source, and a light detection unit that detects eyeball reflection light in which the image light is reflected in the eyeball of a user; and the control device controls the chromaticity of the image light on the basis of the result of detection by the light detection unit.
G09G 5/00 - Dispositions ou circuits de commande de l'affichage communs à l'affichage utilisant des tubes à rayons cathodiques et à l'affichage utilisant d'autres moyens de visualisation
G09G 5/02 - Dispositions ou circuits de commande de l'affichage communs à l'affichage utilisant des tubes à rayons cathodiques et à l'affichage utilisant d'autres moyens de visualisation caractérisés par la manière dont la couleur est visualisée
G09G 5/36 - Dispositions ou circuits de commande de l'affichage communs à l'affichage utilisant des tubes à rayons cathodiques et à l'affichage utilisant d'autres moyens de visualisation caractérisés par l'affichage de dessins graphiques individuels en utilisant une mémoire à mappage binaire
G09G 3/20 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques pour la présentation d'un ensemble de plusieurs caractères, p. ex. d'une page, en composant l'ensemble par combinaison d'éléments individuels disposés en matrice
G09G 3/34 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques pour la présentation d'un ensemble de plusieurs caractères, p. ex. d'une page, en composant l'ensemble par combinaison d'éléments individuels disposés en matrice en commandant la lumière provenant d'une source indépendante
H04N 5/64 - Détails de structure des récepteurs, p. ex. ébénisterie ou housses
The purpose of the present invention is to provide an image projection device which can mitigate imaging surface warpage specifications of a projection lens with a simple method. To achieve the purpose, the image projection device which generates image light is configured to comprise: a display unit which generates an image; a projection lens which projects, as image light, the image generated by the display unit; and an optical path length correction element which corrects the optical path length between the display unit and the projection lens, wherein the optical path length correction element is disposed between the display unit and the projection lens.
G02B 15/02 - Objectifs optiques avec moyens de faire varier le grossissement en modifiant, ajoutant ou retirant une partie de l'objectif, p. ex. objectifs transformables
G02B 15/08 - Objectifs optiques avec moyens de faire varier le grossissement en modifiant, ajoutant ou retirant une partie de l'objectif, p. ex. objectifs transformables par changement d'une partie à savoir la partie arrière
G03B 21/00 - Projecteurs ou visionneuses du type par projectionLeurs accessoires
G03B 21/14 - Projecteurs ou visionneuses du type par projectionLeurs accessoires Détails
This head mounted display for displaying a video in the field of view of a user comprises a video display unit which generates a video to display, and a first light guide plate and a second light guide plate which duplicate video light from the video display unit, wherein: the first light guide plate and the second light guide plate each have one set of main surfaces that are parallel and confine the video light by means of internal reflection; the first light guide plate has an incident surface which reflects the video light inward and two or more emission reflective surfaces which emit the video light to the second light guide plate; the second light guide plate has an input part which couples the video light from the first light guide plate inward, and an output part which emits the video light to a pupil of the user; and an angle formed between a duplication direction of the video light of the first light guide plate and a duplication direction of the video light of the second light guide plate is less than 90°.
G09F 9/00 - Dispositifs d'affichage d'information variable, dans lesquels l'information est formée sur un support, par sélection ou combinaison d'éléments individuels
G09G 5/00 - Dispositions ou circuits de commande de l'affichage communs à l'affichage utilisant des tubes à rayons cathodiques et à l'affichage utilisant d'autres moyens de visualisation
G09G 5/34 - Dispositions ou circuits de commande de l'affichage communs à l'affichage utilisant des tubes à rayons cathodiques et à l'affichage utilisant d'autres moyens de visualisation pour le mouvement ou pour le défilement
The problem addressed by the present invention is to suppress luminance changes caused by pixel positions in image information viewed by a user. A preferable aspect of the present invention is a light guiding plate comprising: a substrate; an incidence diffraction grating for diffracting incident light; and an emission diffraction grating for emitting, from the substrate, light diffracted by the incidence diffraction grating. The emission diffraction grating has a mesh-like grating pattern formed on the substrate. The mesh-like grating pattern is formed from a first parallel straight line group and a second parallel straight line group intersecting the first parallel straight line group. The pitch of the first parallel straight line group and the pitch of the second parallel straight line group are equal. Between the incidence diffraction grating and the mesh-like grating pattern, a line region is provided that consists only of the first parallel straight line group or the second parallel straight line group.
G02B 1/02 - Éléments optiques caractérisés par la substance dont ils sont faitsRevêtements optiques pour éléments optiques faits de cristaux, p. ex. sel gemme, semi-conducteurs
The purpose of the present invention is to provide a head-mounted display with which contrast deterioration can be adjusted and improved with a simple configuration. To achieve the foregoing, provided is a head-mounted display device comprising: a video display device equipped with a liquid crystal layer that changes a polarization angle to 90° and 0°; an irradiation system that supplies irradiation light to the video display device; and a polarization optical element that guides the irradiation light to the video display device and selects transmission/reflection according to the polarization angle of the light which is changed by the video display device. A polarization functional element is disposed between the polarization optical element and the video display device.
The audio acquisition apparatus includes: a three-dimensional position acquisition unit configured to acquire a three-dimensional position of an object present in a predetermined region; a three-dimensional position tracking unit configured to track, when a sound emitting body is present in the predetermined area, a three-dimensional position of the sound emitting body; a sound pickup unit configured to pick up a sound emitted from the sound emitting body; a communication unit configured to supply the sound picked up by the sound pickup unit to an external apparatus and receive information supplied from the external apparatus; and a sound pickup control unit configured to three-dimensionally follow a sound pickup direction of the sound acquired through the sound pickup unit in accordance with the tracking executed by the three-dimensional position tracking unit.
H04R 1/40 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement en combinant plusieurs transducteurs identiques
A power transmission device that has a power transmission coil and transmits power to a power reception device having a power reception coil by wireless power transmission, includes positioning means for placing the power reception device, the power transmission coil being disposed to be substantially parallel to a lower part of a placement surface of the positioning means, in which when the power reception device is placed on the placement surface of the positioning means, the power reception coil is disposed to be substantially parallel to the placement surface and is disposed by sliding a center of the power transmission coil by a predetermined distance from a center of the power reception coil.
H02J 50/90 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique mettant en œuvre la détection ou l'optimisation de la position, p. ex. de l'alignement
H02J 50/00 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique
H02J 50/10 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique utilisant un couplage inductif
H02J 50/80 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique mettant en œuvre l’échange de données, concernant l’alimentation ou la distribution d’énergie électrique, entre les dispositifs de transmission et les dispositifs de réception
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H02J 7/04 - Régulation du courant ou de la tension de charge
34.
Light-guide plate, manufacturing method for the same, light-guide plate module, and image display device
The light-guide plate includes a substrate, an incidence diffraction grating that diffracts incident light, and an emission diffraction grating that emits light from the substrate, the light being diffracted by the incidence diffraction grating. The emission diffraction grating is formed of a recessed/projected pattern formed on a substrate surface, the recessed/projected pattern includes a first group of parallel straight lines and a second group of parallel straight lines intersecting the first group of parallel straight lines, and a pitch of the first group of parallel straight lines is equal to a pitch of the second group of parallel straight lines. A relationship between the pitch P of the first group of parallel straight lines and the second group of parallel straight lines and a pattern width W of the recessed/projected pattern is defined as W/P, which is 0.15 or more and 0.85 or less.
A laser projection display apparatus includes: a laser light source that generates laser lights of a plurality of colors; a laser light source driving unit that drives the laser light source; a light intensity detector that detects an intensity of the laser light; an overshoot current determining unit that determines a reference overshoot current for improving a rising response of the laser light source; and an overshoot current applying unit that applies an overshoot current to an image signal based on the reference overshoot current. The overshoot current determining unit supplies the overshoot current to the laser light source driving unit while changing the overshoot current, so as to cause the laser light source to emit light, and determines the reference overshoot current such that a light intensity detected when the laser light source emits light becomes a target value.
The purpose of the present invention is to provide an image display element configured to consider resistance to environmental changes while using plastic for a light-guiding plate, and an image display device using the same. To achieve the purpose, provided is an image display element having a light-guiding plate. The image display element comprises an incidence diffraction grating which diffracts incident light, and an emission diffraction grating from which light that has propagated through the light-guiding plate after being diffracted by the incidence diffraction grating is emitted, the incidence diffraction grating and the emission diffraction grating being each formed by a pattern of protrusions and recesses formed on a surface of the light-guiding plate, and the image display element being obtained by joining the light-guiding plate and a cover glass protecting the pattern of protrusions and recesses or two or more light-guiding plates with an air layer therebetween by a holding member, and being configured such that the light-guiding plate and the cover glass are formed by a plastic material, and the holding member has an air vent through which air in the air layer and outside air communicate.
A head mounted display displays an image in a user's view field and includes a projection unit projecting image light from an image display unit; and a first and second light guide plates that duplicate the image light from the projection unit. The first and second light guide plates each include a set of parallel main surfaces confining the image light by internal reflection. The first light guide plate includes an incident surface reflecting the image light inward, and two or more emission reflective surfaces emitting the image light to the second light guide plate. The incident and emission reflective surfaces are parallel to each other at an angle different from the main surface, and the second light guide plate includes an input unit coupling the image light from the first light guide plate inward, and an output unit emitting the image light to the user's pupil.
There is provided a distance measurement system in which a plurality of distance measurement sensors are installed to detect an object in a measurement area, the system including: a detection intensity distribution display device that performs quantification according to light intensities of light which reaches the object after being emitted from the distance measurement sensors, or point cloud numbers, and displays colors or lights and shades according to magnitudes of numerical values to perform visualization and a display. The detection intensity distribution display device regards a space in front of the distance measurement sensors as one cube, divides the cube into a plurality of small cubes (voxels), and quantifies a detection intensity according to the light intensity of the light that reaches each of the voxels after being emitted from the distance measurement sensors, or the point cloud number of each of the voxels.
A virtual image projection device that generates image light includes a light source that emits light; a microlens array that emits the light, which is emitted from the light source, as light having a predetermined angle distribution; an imaging lens that concentrates the light from the microlens array; a display unit that is irradiated with the light, which is concentrated by the imaging lens, to generate an image; and a projection unit that projects the image, which is generated by the display unit, as image light. The microlens array is disposed such that short side directions of lens cells do not line up straight.
A distance measuring device includes: a light emitting unit that irradiates a subject; a light receiving unit that receives reflected light; a distance calculating unit that calculates a distance to the subject; a luminance calculating unit that calculates a luminance of the subject; an image processing unit that generates a distance image and a luminance image of the subject; a screen luminance calculating unit that calculates a screen luminance value from the luminance image; and a light source light emission determining unit that determines whether a light emission state of the light source is normal or abnormal. The light source light emission determining unit acquires a screen luminance value at the time of turning on the light source in a first frame, a screen luminance value at the time of turning off the light source in a second frame, and compares the screen luminance values of each of the frames.
There is provided a distance measurement system in which a plurality of distance measurement sensors are installed to generate a distance image of an object in a measurement region, the system including a cooperative processing device that performs alignment between the distance measurement sensors, and composes distance data from the plurality of distance measurement sensors to display the distance image of the object. In order to perform the alignment between the distance measurement sensors, trajectories (referred to as motion lines) of a person moving in the measurement region are acquired by the plurality of distance measurement sensors, and the cooperative processing device performs calibration of an installation position of each of the distance measurement sensors such that the motion lines acquired by the distance measurement sensors coincide with each other in a common coordinate system.
A distance measurement device includes a light-emitting-unit that emits irradiation light toward an object; a light-receiving unit that receives reflected light from the object; a distance-calculation unit that calculates a distance to the object based on a transmission time of the reflected light received; a posture-adjustment mechanism that adjusts a posture of at least the light-receiving-unit; and a posture-controller that drives the posture-adjustment mechanism. The light-receiving unit is formed of a two-dimensional sensor in which a plurality of pixels are two-dimensionally arrayed, and the distance-calculation unit calculates two-dimensional distance data from received light data in each of the pixels of the two-dimensional sensor. The posture-controller controls the posture of the light-receiving unit via the posture-adjustment mechanism such that a direction of a pixel array of the two-dimensional sensor is inclined by a predetermined angle θ with respect to a direction of a ridge of the object to receive the light.
G01B 11/14 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la distance ou la marge entre des objets ou des ouvertures espacés
G01S 17/08 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement
G06T 7/70 - Détermination de la position ou de l'orientation des objets ou des caméras
G01S 17/894 - Imagerie 3D avec mesure simultanée du temps de vol sur une matrice 2D de pixels récepteurs, p. ex. caméras à temps de vol ou lidar flash
G06T 7/521 - Récupération de la profondeur ou de la forme à partir de la télémétrie laser, p. ex. par interférométrieRécupération de la profondeur ou de la forme à partir de la projection de lumière structurée
43.
Measurement-value correction method for distance measuring device, and distance measuring device
At a preparatory step for correction, in a state that a reflective tape made with a retroreflective material is pasted in advance onto a floor surface of a measurement space in a direction away from the distance-measuring device, a distance La to an inside area of the reflective tape, and a distance Lb to an outside area of the reflective tape adjacent to the inside area are measured by the distance-measuring device, while measurement positions Y are being scanned along the reflective tape. A correction formula for converting the distance Lb to the distance La is created from a relationship between the distance La and the distance Lb obtained at each measurement position Y. At an actual measurement step, a distance (actual measurement value x) to the target object measured by the distance-measuring device is corrected in accordance with the correction formula, and a measurement-distance corrected value y is calculated.
There is provided a light source module in which an optical element is accommodated in a housing, in which three projection portions are provided in the housing, and the light source module has a structure where the optical element is pressed to be brought into contact with the three projection portions by a pressing member, so that the optical element is fixed in the housing.
G02B 7/182 - Montures, moyens de réglage ou raccords étanches à la lumière pour éléments optiques pour prismesMontures, moyens de réglage ou raccords étanches à la lumière pour éléments optiques pour miroirs pour miroirs
45.
IMAGE DISPLAY ELEMENT, IMAGE DISPLAY DEVICE, AND IMAGE DISPLAY METHOD
While plastic is used as a light guide plate, the brightness of image information visually recognized by a user is improved. This image display element comprises an incident diffraction grid that diffracts incident light and an exit diffraction grid that emits light, wherein the incident diffraction grid is formed in a first surface of a substrate, the exit diffraction grid is formed in a second surface opposite to the first surface of the substrate, and the exit diffraction grid is formed in one surface.
The present invention improves brightness of image information viewed by a user while using plastic for a light guiding panel. This image display element comprises: a plastic substrate; an incident diffraction grating that is integrally formed with the surface of the plastic substrate and diffracts incident image light; an emission diffraction grating that is integrally formed with the surface of the plastic substrate and emits the image light; and a coating layer that is formed on the emission diffraction grating, and has a thickness of 10 to 1000 nm and a refractive index of 1.64 to 2.42.
The present invention provides an omnidirectional distance measuring device that covers a wide detection range and does not require adjustment of each of the detection areas of a plurality of distance measuring sensors. In the omnidirectional distance measuring device, a plurality of distance measuring sensors that measure a distance to a target are disposed radially around a central axis so as to be close to each other. The plurality of distance measuring sensors are integrally configured such that a detection center direction of each of the plurality of distance measuring sensors is inclined by a predetermined angle from a plane perpendicular to the central axis. As the distance measuring sensor, a TOF sensor that measures a distance based on a flight time of light or a stereo camera that measures a distance using parallax of a pair of cameras is used.
There is provided a highly efficient virtual image projection device in a small size that displays images of high luminance in which an illumination system is reduced in size with no degradation in an effective luminous light beam. A virtual image projection device that shows video to a human eye includes a virtual light source surface (116) that emits a light beam in a predetermined angular distribution, an image forming lens (117) that condenses the light beam from the virtual light source surface (116), and a display (120) that creates video. When the virtual light source surface (116) is disposed at a nearly focal position on the front side of the image forming lens (117), the display (120) is disposed at a nearly focal position on the rear side of the image forming lens.
G02B 13/18 - Objectifs optiques spécialement conçus pour les emplois spécifiés ci-dessous avec des lentilles ayant une ou plusieurs surfaces non sphériques, p. ex. pour réduire l'aberration géométrique
H04N 9/31 - Dispositifs de projection pour la présentation d'images en couleurs
The present invention provides a light guide plate-type image display device and an image display system capable of displaying an image with less color deviation and image distortion. An image display device 101 for displaying an image is provided with: an image projection unit 200 that projects image light; an image deflection unit 210; and a light guide unit 230. The image deflection unit 210 deflects the image light emitted from the image projection unit 200 and causes the image light to propagate to the light guide unit 230. The light guide unit 230 causes the entered image light to propagate therein and then outputs the image light. The image deflection unit 210 or the light guide unit 230 is configured so as to reduce chromatic dispersion of the image light outputted from the light guide unit 230.
The purpose of the present invention is to provide a head-mounted display that achieves both a larger eye box and a more compact and efficient optical system. In order to accomplish this purpose, a head-mounted display that displays an image within the field of view of a user is configured to have: an image display unit that generates an image to be displayed; a projection unit that projects image light from the image display unit; an image rotation/replication unit that enlarges the eye box of projected light from the projection unit; and a light guide unit that transmits, to a pupil of the user, image light from the image rotation/replication unit, wherein the image rotation/replication unit is provided with an incidence surface, an emission surface, and two or more reflection surfaces, and the angle formed by the incidence surface and the emission surface is greater than 90°.
The present invention addresses the problem of providing: a color shift correction device for reducing the color shift in a reconstructed image which has been emitted by a light-guide plate for outputting a reconstructed image by propagating an input image and diffracting light via a hologram; and a method for correcting color shift. The present invention provides a color shift correction device equipped with an optical system-securing device (600) for securing a light-guide plate (200) and movably holding a light source (500) for inputting an input image into the light-guide plate (200), a light-receiving device (300) for receiving a reconstructed image outputted from the light-guide plate (200), a light-receiving device drive circuit (320) for driving the light-receiving device (300), a light source drive circuit (510) for driving the light source (500), and a control device (400) for controlling the entire color shift correction device, wherein said control device (400) controls the light source (500) in a manner such that the input image includes a white line, gradation data of each RGB color which constitutes the white line of the reconstructed image is acquired for each single pixel, the color shift amount is determined from the gradation data, and on the basis of the color shift amount, the position or angle of incidence of the light source (500) onto the light-guide plate (200) is controlled by controlling the light source drive circuit (510).
H04N 5/64 - Détails de structure des récepteurs, p. ex. ébénisterie ou housses
H04N 13/344 - Affichage pour le visionnement à l’aide de lunettes spéciales ou de visiocasques avec des visiocasques portant des affichages gauche et droit
According to the present invention, provided is a head mounted display wherein even reception of an impactive force from the outside would cause neither exfoliation nor cracks to occur in the joint surface between a light guide plate and a prism and would cause neither deviation of displayed images nor reduction of light utilization efficiency. In a head mounted display 100 in which image light generated by an image generation unit 20 is reflected by a prism 2, going out from a light guide plate 1, the image generation unit 20 is located in a casing 10; the prism 2 is fixed inside the casing 10; and the light guide plate 1 is arranged in such a manner that the light guide plate 1 is joined to the prism 2, protruding outward from an opening of the casing 10. The light guide plate 1 is fixed to the casing by use of bonding agents 3a, 3b at the opening of the casing 10, while displacement restriction parts 12a, 12b for suppressing displacement of the light guide plate 1 are provided to the opening of the casing 10.
A distance measurement device includes a light emitting unit; a light receiving unit; a distance calculation unit that calculates a distance to an object; and a controller that controls the light emitting unit and the light receiving unit to determine whether or not there is interference from another distance measurement device, from a distance calculation result from the distance calculation unit. The controller includes a light emission and exposure period-setting unit that sets a light emission and exposure period of the light emitting unit and the light receiving unit, a distance variation measurement unit that measures a variation of distance values repeatedly obtained in a predetermined duration by the distance calculation unit, and an interference determination unit that compares a distance variation value to a threshold value which is determined in advance, to determine whether or not there is interference.
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
An image display device projecting an image to a user includes: an image generation unit that generates image light; a projection optical unit that projects the image light generated by the image generation unit; an image light duplication unit that duplicates and emits the image light projected by the projection optical unit; and a light-guiding unit that projects the image light duplicated by the image light duplication unit to a user, in which the projection optical unit includes at least one projection lens, and in which an interval at which the image light duplication unit duplicates the image light is smaller than an outer diameter of the projection lens.
Provided is a waveguide having a light diffraction unit that diffracts incident light by a multiplex-recorded hologram, in which, in the light diffraction unit, a plurality of holograms having different angles with respect to an incident surface of the waveguide are formed, and when certain parallel light beams are incident, different wavelengths are diffracted by the plurality of holograms.
G03H 1/26 - Procédés ou appareils adaptés spécialement pour produire des hologrammes multiples ou pour en obtenir des images, p. ex. procédés pour l'holographie à plusieurs couleurs
F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage
G03H 1/02 - Procédés ou appareils holographiques utilisant la lumière, les infrarouges ou les ultraviolets pour obtenir des hologrammes ou pour en obtenir une imageLeurs détails spécifiques Détails
H04N 9/31 - Dispositifs de projection pour la présentation d'images en couleurs
Both uniformity of brightness and uniformity of color of the outside world are seen via a waveguide. A video image is reflected by a partial reflection surface inside the waveguide that includes an incident surface on which video image light is incident, first and second internal reflection surfaces that propagate the video image light incident from the incident surface while totally reflecting the video image light, and are substantially parallel to each other. A plurality of partial reflection surfaces that reflect a part of the video image light propagating by being totally reflected by the first and second internal reflection surfaces, output the part of the video image light as output light from the first internal reflection surface to the outside of the waveguide, and transmit the part of the video image light being incident, and are disposed substantially parallel to each other inside the waveguide.
It is an objective of this disclosure to protect a highly transparent hologram light guide plate from water vapor and ultraviolet ray, thereby suppressing deterioration of the hologram light guide plate even when employed in a head mount display used in outdoor environments. A hologram light guide plate according to this disclosure comprises a protection layer that protects a hologram layer and an intermediate layer that is placed between a glass layer and the protection layer, wherein the glass layer and the hologram layer form a transfer layer that transfers image light. The intermediate layer causes the image light to transfer only in the transfer layer in a section from an input area of the image light to an output area of the image light.
G02B 6/12 - Guides de lumièreDétails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p. ex. des moyens de couplage du type guide d'ondes optiques du genre à circuit intégré
58.
LASER PROJECTION DISPLAY DEVICE AND METHOD FOR DRIVING LASER BEAM SOURCE
A laser projection display device 1 is provided with: a laser beam source 5 that emits a plurality of colors of laser beams; a laser beam source driving unit 4 that drives the laser beam source; a beam intensity detector 10 that detects intensities of the laser beams; an overshoot current determination unit 28 that determines a reference overshoot current for improving rising responses of the laser beams; and an overshoot current application unit 27 that applies an overshoot current to an image signal on the basis of the reference overshoot current. The overshoot current determination unit 28 changes the overshoot current and supplies the changed overshoot current to the laser beam source driving unit 4 so as to cause the laser beam source to emit a laser beam, and determines the reference overshoot current so that the beam intensity detected at that time can be a target value. Thus, it is possible to prevent changes of the rising responses of the beam intensities of the laser beams caused by a change of an ambient temperature or deterioration over time.
G09G 3/02 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques par traçage ou balayage d'un faisceau lumineux sur un écran
G09G 3/34 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques pour la présentation d'un ensemble de plusieurs caractères, p. ex. d'une page, en composant l'ensemble par combinaison d'éléments individuels disposés en matrice en commandant la lumière provenant d'une source indépendante
H01S 5/0683 - Stabilisation des paramètres de sortie du laser en surveillant les paramètres optiques de sortie
G02B 26/08 - Dispositifs ou dispositions optiques pour la commande de la lumière utilisant des éléments optiques mobiles ou déformables pour commander la direction de la lumière
A three-dimensional distance measurement device includes a light emitting unit that irradiates a subject with light; a light receiving unit that detects reflected light from the subject; a distance calculation unit that calculates a three-dimensional distance to the subject on the basis of a transmission time of the detected reflected light; an image processing unit that generates a distance image of the subject on the basis of the calculated distance data; and a distance mode selection processing unit that selects a predetermined distance mode from a plurality of distance modes having different measurable distance ranges and sets a driving condition of the light emitting unit. By selecting a first distance mode in a first frame and selecting a second distance mode in a second frame, and by combining the distance data acquired in the respective frames, three-dimensional distance data of a frame to be output is generated.
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
G01S 17/89 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour la cartographie ou l'imagerie
60.
LIGHT GUIDE PLATE, PRODUCTION METHOD FOR SAME, LIGHT GUIDE PLATE MODULE, AND IMAGE DISPLAY DEVICE
The present invention achieves a safe and lightweight plastic light guide plate. A light guide plate that comprises a substrate, an incidence diffraction grating that diffracts incident light, and an emission diffraction grating that emits light that has been diffracted by the incidence diffraction grating from the substrate. The emission diffraction grating is a relief pattern that is formed on the surface of the substrate. The relief pattern is formed from a first parallel straight line group and a second parallel straight line group that crosses the first parallel straight line group. The pitch of the first parallel straight line group is the same as the pitch of the second parallel straight line group. The light guide plate is characterized in that the pitch P of the first parallel straight line group and the second parallel straight line group and the width W of the relief pattern are related such that W/P is 0.15–0.85.
The present invention pertains to a light source module which projects a plurality of laser beams that have different wavelengths and are respectively emitted from a plurality of laser light sources such that the laser beams are gathered to an optical path the position of which is substantially identical to the traveling direction of the laser beams, and the objective of the present invention is to reduce a difference in a change in the traveling direction of a laser beam, which is caused by a change in the environmental temperature, between the laser beams having different wavelengths. In order to achieve the above objective, the present invention provides a light source module comprising laser light sources in which a laser chip is installed on a heat sink, and laser holders that hold the laser light sources, wherein the stiffness of a side wall of each laser holder on the laser chip side is made different from the stiffness of a side wall of each laser holder on the heat sink side.
The purpose of the present invention is to provide a light source module in which a collimating lens is easily positioned, and even when an adhesive expands or contracts due to a change in environmental temperature, the deviation of a laser optical axis can be reduced. To attain the abovementioned purpose, this light source module comprises a collimating lens, and a lens holder that holds the collimating lens, and is configured such that the lens holder has a first column body that protrudes from a surface facing a convex surface-side peripheral edge flat portion of the collimating lens to the convex surface-side peripheral edge flat portion of the collimating lens, and a second column body that protrudes in the same direction as the first column body from the surface facing the convex surface-side peripheral edge flat portion of the collimating lens, the side surface of the collimating lens is contact with the side surface of the second column body at two points, the protrusion amount of the second column body is larger than the protrusion amount of the first column body, and the protrusion position of the second column body and the protrusion position of the first column body deviate from each other in the circumferential direction of the collimating lens.
The present invention provides a light-guiding plate which is applicable to incident rays over a wide ray angular range and wide wavelength rage, and is able to suppress a decrease in optical efficiency. A light-guiding plate 200 having a light diffracting portion 1200 for diffracting incident light by a multiple-recorded hologram is configured such that, in the light diffracting portion, when light 1210 of a single wavelength having a certain angular range is incident, at least two or more outgoing rays 1220 are discretely emitted with a first angular space θs, and the emitted rays each have a second angular range θa, and the first angular space θs is equal to or larger than the second angular range θa.
G02B 5/32 - Hologrammes utilisés comme éléments optiques
F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage
G03H 1/02 - Procédés ou appareils holographiques utilisant la lumière, les infrarouges ou les ultraviolets pour obtenir des hologrammes ou pour en obtenir une imageLeurs détails spécifiques Détails
G03H 1/26 - Procédés ou appareils adaptés spécialement pour produire des hologrammes multiples ou pour en obtenir des images, p. ex. procédés pour l'holographie à plusieurs couleurs
A light guide plate includes: first and second internal reflective surfaces that are approximately parallel and propagate incoming image light while totally reflecting the image light; a partially reflective surface array that has a plurality of partially reflective surfaces arranged in a direction of propagating image light, the partially reflective surfaces being inclined at a predetermined angle and partially reflecting the image light; and a uniforming element that uniforms intensity distribution of image light which is reflected by the partially reflective surface array to be projected from the light guide plate. As the uniforming element, the partially reflective surface array is divided into a plurality of segments along a direction of propagating image light, and the inter-surface spacing of the partially reflective surfaces or the reflectivity of the partially reflective surfaces is configured to vary from segment to segment.
A head mounted display has a display unit to generate a displayed image, an illumination unit to emit illumination light to the display unit, a projection unit to project image light from the display unit, and a light guide unit to transmit image light from the projection unit to pupils of a user. Here, the illumination unit has light source units, a microlens array that is illuminated by light emitted from the light source units and becomes a virtual secondary light source, a condensing optical member to focus light from the microlens array on the display unit, and a diffusion plate to diffuse light from the microlens array, and the diffusion plate is arranged closer to the condensing optical member than to the microlens array. As a result, a conjugate image is inhibited from being generated with the adoption of a microlens array.
F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage
H04N 13/344 - Affichage pour le visionnement à l’aide de lunettes spéciales ou de visiocasques avec des visiocasques portant des affichages gauche et droit
To provide a wide eye box and are capable of displaying a video having uniform luminance, it is provided a video display apparatus comprising: a video projection unit configured to project video light; a video light replication unit configured to replicate the video light; and a light guiding unit configured to transmit the video light through an inside of the light guiding unit, wherein the video light replication unit is configured to transmit the video light emitted from the video projection unit to the light guiding unit, wherein the light guiding unit is configured to transmit the video light that has entered through the inside to output the video light, and wherein the video light replication unit is configured to replicate the video light that has entered the video light replication unit so that a luminance distribution of the video light output from the light guiding unit is uniform.
The video display device includes a laser light source unit, a video processing unit that outputs a video gradation signal, a current gain signal, and a current offset signal, a laser driver that outputs the drive current based on the video gradation signal, the power supply gain signal, and the current offset signal, and a dimming level processing unit that divides a dimming level for designating brightness of a video into a plurality of dimming modes and divides the dimming level into in-mode levels within the divided dimming modes, wherein the video processing unit includes a video gradation value output unit that outputs the video gradation signal obtained by scaling and offsetting a gradation value of the video based on the dimming mode and the in-mode level, a current gain output unit that outputs the current gain signal depending on the dimming mode.
G09G 3/02 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques par traçage ou balayage d'un faisceau lumineux sur un écran
H04N 9/31 - Dispositifs de projection pour la présentation d'images en couleurs
H04N 9/78 - Circuits pour le traitement l'un par rapport à l'autre des signaux de luminance et de chrominance, p. ex. ajustement de la phase du signal de luminance par rapport au signal de couleur, correction différentielle du gain ou de la phase pour séparer le signal de luminance ou le signal de chrominance du signal de télévision en couleurs, p. ex. en utilisant un filtre en peigne
To improve brightness of an image to be perceived by a user and enhance visibility there is provided a light guide plate including an incident diffraction grating which diffracts incident imaging light, an exit diffraction grating through which the imaging light goes out, and an intermediate diffraction grating existing in optical paths from the incident diffraction grating to the exit diffraction grating. In this light guide plate, a periodic linear corrugated pattern is formed as the incident diffraction grating, and when an imaginary line is established that passes through an incident point of imaging light onto the incident diffraction grating and is parallel with a periodic direction of the corrugated pattern, the intermediate diffraction grating has a first region on one side of the imaginary line and a second region on another side of the imaginary line.
A distance measurement image pickup apparatus has two measurement periods. In a first distance measurement period, short pulsed light (1T) is irradiated, and exposure is performed in a plurality of exposure periods (A, B, and C) in which exposure timings are shifted. In each exposure period, an exposure gate is opened a plurality of times to perform repetitive exposure, and a first non-exposure period is provided from when a last exposure gate is closed until subsequent pulsed light is irradiated. In a second distance measurement period, long pulsed light (4T) is irradiated, and exposure is performed in a plurality of exposure periods (A, B, and C) in which exposure timings are shifted. In each exposure period, exposure is performed by opening the exposure gate only once, and a second non-exposure period is provided from when a last exposure gate is closed until subsequent pulsed light is irradiated.
G01S 17/89 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour la cartographie ou l'imagerie
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
H04N 5/235 - Circuits pour la compensation des variations de la luminance de l'objet
H04N 5/372 - Capteurs à dispositif à couplage de charge [CCD]; Registres d'intégration à temps de retard [TDI] ou registres à décalage spécialement adaptés au capteur SSIS
G01S 7/4865 - Mesure du temps de retard, p. ex. mesure du temps de vol ou de l'heure d'arrivée ou détermination de la position exacte d'un pic
G01S 7/481 - Caractéristiques de structure, p. ex. agencements d'éléments optiques
G01S 7/487 - Extraction des signaux d'écho désirés
G01S 17/04 - Systèmes de détermination de la présence d'une cible
G01S 17/18 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues dans lesquels des fenêtres en distance sont utilisées
G01S 17/32 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes continues, soit modulées en amplitude, en fréquence ou en phase, soit non modulées
G01S 17/42 - Mesure simultanée de la distance et d'autres coordonnées
70.
Video projector having video display element with reflection surface formed of a plurality of micromirrors
The reflection surface of a DMD is divided into a first area and a second area, causing the first area to display images while appropriately controlling the on and off states of the micromirrors within the second area on the basis of a prescribed control logic according to the on and off states of the micromirrors within the first area. Further, the DMD off-state light created in the first and second areas is caused to recurse to the DMD via a prescribed recycle optical system for the DMD off-state light, and only the second area in the reflection surface is intensively irradiated along a prescribed irradiation direction, thereby efficiently converting the DMD off-state light to the effective projection light.
G02B 26/08 - Dispositifs ou dispositions optiques pour la commande de la lumière utilisant des éléments optiques mobiles ou déformables pour commander la direction de la lumière
The purpose of the present invention is to provide a light guide plate, a method for manufacturing the light guide plate, and an image display device using the same, which can be applied to incident light with a wide light angle range and a wide wavelength range, and can suppress a decrease in optical efficiency while maintaining high see-through performance. In order to achieve the above purpose, the light guide plate has a light diffraction unit that diffracts the incident light by a multiplexed hologram, wherein the light diffraction unit has at least two regions, and the respective regions diffract light having different wavelengths when certain parallel light is incident.
G02B 5/32 - Hologrammes utilisés comme éléments optiques
G02B 6/124 - Lentilles géodésiques ou réseaux intégrés
G03H 1/28 - Procédés ou appareils adaptés spécialement pour produire des hologrammes multiples ou pour en obtenir des images, p. ex. procédés pour l'holographie à plusieurs couleurs uniquement des hologrammes superposés
72.
Image projection optical module and head mounted display
An image projection optical module including: an image generating element configured to generate an image; an image display unit configured to display the image; and a coupling member thermally connected to the image generating element, the coupling member including a front heat dissipation portion on a front portion of the coupling member when a direction of line of sight of a user wearing a casing of a head mounted display provided with the image projection optical module is defined as a forward direction, the front heat dissipation portion being to dissipate heat.
The purpose of the present invention is to achieve reduction in cost and weight by use of an optical guide plate made of glass. An optical guide plate (1500) according to the present invention is provided with: a first member (304R) that is made of a first resin; and a second member (307R) that is made of a second resin (1604) and is formed on at least a portion of the first member (304R). In this optical guide plate (1500): the first resin and the second resin (1604) are different resins; the first member (304R) has formed thereon a first diffraction grating (303) having a first pattern; and the second member (307R) has formed thereon a second diffraction grating having a second pattern. The first pattern is different from the second pattern.
G02B 6/00 - Guides de lumièreDétails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p. ex. des moyens de couplage
H04N 5/64 - Détails de structure des récepteurs, p. ex. ébénisterie ou housses
H04N 13/344 - Affichage pour le visionnement à l’aide de lunettes spéciales ou de visiocasques avec des visiocasques portant des affichages gauche et droit
In a range imaging camera, a first range image producing unit produces a first range image by calculating a distance to an object on the basis of the delay time or the received light amount of each pixel produced by a light receiving processing unit. A second range image producing unit produces a second range image by performing filtering for each pixel of the first range image using a group of neighboring pixels including its own pixel. In this case, a pixel group selection unit selects a group of pixels used in the filtering such that at least one of produced values including the delay time and the received light amount produced by the light receiving processing unit and the first range image produced by the first range image producing unit is equal to or larger than a noise component value.
A head mounted display includes a first optical housing mounting a light source and an optical component, a second optical housing mounting an image generating element and an optical component, a securing member connecting and securing the first optical housing and the second optical housing, and an exterior housing holding the first optical housing, the second optical housing, and the securing member. The securing member is fitted with the first optical housing with the second optical housing enclosed to connect and secure the first optical housing and the second optical housing.
The present invention provides a light-guiding plate which is applicable to incident rays over a wide ray angular range and wide wavelength rage, and is able to suppress a decrease in optical efficiency. A light-guiding plate 200 having a light diffraction part 1200 for diffracting incident light by a multiple-recorded hologram is configured such that, in the light diffraction part, when light 1210 of single wavelength having a certain angular range is incident, at least two or more outgoing rays 1220 are discretely emitted with a first angular space θs therebetween, the emitted rays each have a second angular range θa, and the first angular space θs is greater than or equal to the second angular range θa.
G02B 5/32 - Hologrammes utilisés comme éléments optiques
G02B 6/00 - Guides de lumièreDétails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p. ex. des moyens de couplage
G03H 1/04 - Procédés ou appareils pour produire des hologrammes
The optical module for optical height measurement includes a laser light source, an irradiation optical system, a detection optical system, and a detector. The laser light source is configured to irradiate the layer-structured specimen with a light beam. The irradiation optical system includes an objective lens. The objective lens is located to be approximately perpendicular to the layer-structured specimen. The detection optical system is configured to guide a reflected light reflected by the layer-structured specimen and a light passing through the objective lens and an aperture-restrictor-for-return to the detector. The aperture-restrictor-for-return is located immediately after the objective lens. The aperture-restrictor-for-return is configured to restrict the reflected light and cause only a light in a high NA region to pass through. The detector is configured to convert an entered light into a light detection signal. The detector includes a multi-divided detector array.
G01B 11/06 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la longueur, la largeur ou l'épaisseur pour mesurer l'épaisseur
G02B 27/09 - Mise en forme du faisceau, p. ex. changement de la section transversale, non prévue ailleurs
Provided is a highly efficient compact virtual image projection device that is capable of displaying a high-luminance image while reducing a power supply to a light source by miniaturizing an illuminating system without reducing effective illumination light and combining the system with a projection system in a compact form. This virtual image projection device that shows a video to human eyes is provided with: a virtual light source surface (116) that emits light of a prescribed angle distribution; an image-forming lens (117) that converges the light from the virtual light source surface (116); and a display (120) that generates the video, wherein the display (120) is disposed substantially at a focal position on the rear side of the image-forming lens (117) when the virtual light source surface (116) is disposed substantially at a focal position on the front side of the image-forming lens.
The purpose of the present invention is to achieve uniformity in color and brightness between: the external world seen via a light guiding plate; and a video image reflected on a partial reflection surface inside the light guiding plate. A light guiding plate (1) according to the present invention is characterized by being provided with: an incident surface (11) on which video image light is incident; first and second internal reflection surfaces (13, 14) that are substantially parallel to each other and propagates the video image light having entered the incident surface (11) while totally reflecting the video image light; and an N-number of partial reflection surfaces (17) that partially reflect the video image light totally reflected and propagated by the first and second internal reflection surfaces (13, 14) so as to output, as output light, the video image light from the first internal reflection surface (13) to the exterior of the light guiding plate (1), that partially transmit the incident video image light, and that are disposed substantially parallel to each other inside the light guiding plate (1), wherein intensity Ik of the output light reflected on a k-th (k is an integer of 1 to N) partial reflection surface (17) is not less than intensity I (k+1) of the output light reflected on the (k+1)th partial reflection surface (17) disposed adjacent to the k-th partial reflection surface (17) in the direction away from the incident surface (11).
H04N 5/64 - Détails de structure des récepteurs, p. ex. ébénisterie ou housses
H04N 13/344 - Affichage pour le visionnement à l’aide de lunettes spéciales ou de visiocasques avec des visiocasques portant des affichages gauche et droit
80.
Range image generation apparatus and range image generation method
It is possible to generate a range image with higher accuracy. A range image generation apparatus includes: a light emitting unit that emits light toward an object at different light emission intensities; a light receiving unit that captures an image of the object by receiving light including reflected light from the object and calculates a light exposure amount for each pixel; and a range calculating unit that calculates a range to the object by replacing a light exposure amount at a first light emission intensity by a light exposure amount at a second light emission intensity in a predetermined case and generates a range image.
G01S 17/36 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes continues, soit modulées en amplitude, en fréquence ou en phase, soit non modulées avec comparaison en phase entre le signal reçu et le signal transmis au même moment
G01S 17/89 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour la cartographie ou l'imagerie
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
H04N 5/235 - Circuits pour la compensation des variations de la luminance de l'objet
G01S 17/18 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues dans lesquels des fenêtres en distance sont utilisées
G01S 7/48 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
A distance measurement apparatus 1 includes: a TOF camera 10 having a light-emitting unit 11, a light-receiving unit 12, and a distance-calculating unit 13 to measure a distance to the subject on the basis of light transmission time; and an image processing unit 17 that creates a distance image of the subject from distance data measured by the TOF camera 10. The image processing unit 17 determines whether or not there is a detection target in the created distance image. If there is no detection target in the distance image, the light emission intensity control unit 18 decreases the emitted light intensity from the light source of the light-emitting unit 11, and the operation mode is switched to a power saving mode in which the pixel addition control unit 19 increases an addition ratio of a neighboring pixel signal of the light-receiving unit 12.
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
G01S 17/89 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour la cartographie ou l'imagerie
H04N 5/351 - Réglage du capteur SSIS en fonction de la scène, p.ex. luminosité ou mouvement dans la scène
G01S 7/4865 - Mesure du temps de retard, p. ex. mesure du temps de vol ou de l'heure d'arrivée ou détermination de la position exacte d'un pic
G01B 11/02 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la longueur, la largeur ou l'épaisseur
A three-dimensional distance measurement apparatus include: a plurality of light sources 11 that irradiate light onto the subject; a light emission control unit 12 that controls light emission from a plurality of light sources; a light-receiving unit 13 that detects reflection light from the subject; a distance-calculating unit 14 that calculates a distance to the subject on the basis of a transmission time of reflection light; and an image processing unit 15 that creates a distance image of the subject on the basis of calculated distance data. The plurality of irradiation areas 3 onto which light from the light sources are irradiated are arranged to partially overlap only with the neighboring ones. The light emission control unit 12 individually turns on or off the light sources 11 or individually adjusts the emitted light amounts.
A61B 6/02 - Agencements pour établir un diagnostic dans des plans différents successifsDiagnostic stéréoscopique utilisant des radiations
G06T 7/521 - Récupération de la profondeur ou de la forme à partir de la télémétrie laser, p. ex. par interférométrieRécupération de la profondeur ou de la forme à partir de la projection de lumière structurée
According to the present invention, in an image display device that displays two images in parallel, a peak current for light source driving and continuation of a peak current are suppressed without reducing luminance of a display image. An image display device includes a light source unit, two panel units, and a timing control unit. A period of one frame of an image displayed by each panel unit has a standby period in which the panel unit is not illuminated by the light source unit for image generation and a lighting period in which the panel unit is illuminated by the light source unit. The timing control unit controls an operation timing such that the periods of one frame of the images displayed by the respective panel units overlap, and frame start times of the periods are shifted from each other by a predetermined delay time.
H04N 13/344 - Affichage pour le visionnement à l’aide de lunettes spéciales ou de visiocasques avec des visiocasques portant des affichages gauche et droit
A terminal display device which a user wears on a user's head displays on a display unit an information object to be overlapped with a field of view of the user, detects a motion of the terminal display device, and stores a pattern of a motion of the terminal display device and an operation content of the information object that is displayed in association with each other. An information type management memory unit stores information related to a display mode of each of the information objects. A display control unit determines an operation content of the terminal display device based on the motion that is detected and an association between the motion pattern and the operation content, specifies the information object disposed at a predetermined position of the display unit, and performs an operation specified with the determined operation content on the specified information object.
G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
G06F 3/0346 - Dispositifs de pointage déplacés ou positionnés par l'utilisateurLeurs accessoires avec détection de l’orientation ou du mouvement libre du dispositif dans un espace en trois dimensions [3D], p. ex. souris 3D, dispositifs de pointage à six degrés de liberté [6-DOF] utilisant des capteurs gyroscopiques, accéléromètres ou d’inclinaison
G09G 3/00 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques
G06F 3/0484 - Techniques d’interaction fondées sur les interfaces utilisateur graphiques [GUI] pour la commande de fonctions ou d’opérations spécifiques, p. ex. sélection ou transformation d’un objet, d’une image ou d’un élément de texte affiché, détermination d’une valeur de paramètre ou sélection d’une plage de valeurs
G09G 5/391 - Circuits pour modifier la résolution, p. ex. des formats variables de l'écran
85.
Distance measurement apparatus and angle adjustment method of the same
A distance measurement apparatus 1 includes a light emitting unit 11 that irradiates a subject with a light-source light from a light source, a light receiving unit 12 that receives a reflected light from the subject, a distance calculation unit 13 that calculates a distance to the subject based on a time difference from the irradiation of the light-source light to the reception of the reflected light; and an image processing unit 20 that generates a distance image of the subject based on the calculated distance. Further, the apparatus includes a first rotation mechanism 14 that adjusts an irradiation angle of the light emitting unit and a second rotation mechanism 15 that adjusts a light receiving angle of the light receiving unit, in which the angles of the light emitting unit and the light receiving unit may be adjusted independently of each other.
The purpose of the present invention is to provide a technique for efficiently displaying a high-quality image. An image display device of the present invention is characterized by comprising: a laser light source part (100) for emitting laser light; a light collecting optical part (130) for collecting the laser light emitted from the laser light source part; a light diffusing part (140) which is a transmissive type and diffuses the light from the light collecting optical part; an image forming optical part (150) which forms an image on a projection plane (3) by using the light that is diffused by the light diffusing part; and a scanning part (120) which scans the projection plane with the light from the image forming optical part, wherein the light incident on the image forming optical part (150) has a radius equal to or less than a value extrapolated from a beam diameter in the projection plane (3) and an effective radius in the scanning part (120) using a first distance from the projection plane to the scanning part and a second distance from the projection plane to the image forming optical part.
The present invention provides a video projector capable of efficiently and recursively irradiating a digital micromirror device (DMD) that is a video display element with off-state light created by the DMD via a prescribed recycle optical system, converting the off-state light to effective projection light to thus favorably improve the light use efficiency in a video projection optical system, and increasing the luminance of projection images. The reflection surface 40 of a DMD 4 is divided into a first area and a second area, causing the first area to present images while appropriately controlling the on and off states of the micromirrors within the second area on the basis of a prescribed control logic according to the on and off states of the micromirrors within the first area. Further, the DMD off-state light created in the first and second areas is caused to return to the DMD4 via a prescribed recycle optical system for the DMD off-state light, and only the second area in the reflection surface 40 is intensively irradiated along a prescribed radiation direction, thereby efficiently converting the DMD off-state light to the effective projection light.
G03B 21/14 - Projecteurs ou visionneuses du type par projectionLeurs accessoires Détails
G02B 26/08 - Dispositifs ou dispositions optiques pour la commande de la lumière utilisant des éléments optiques mobiles ou déformables pour commander la direction de la lumière
G02B 27/18 - Systèmes ou appareils optiques non prévus dans aucun des groupes , pour projection optique, p. ex. combinaison de miroir, de condensateur et d'objectif
G03B 21/00 - Projecteurs ou visionneuses du type par projectionLeurs accessoires
H04N 5/74 - Dispositifs de projection pour reproduction d'image, p. ex. eidophor
An object position detection apparatus 1 includes a distance image generation unit 10 which generates a two-dimensional distance image by measuring a distance to a subject including an object on the basis of a light transmission time, an object image generation unit 16 which generates an object image in which the object is extracted from the distance image of the subject, and an installation angle detection unit 20 which detects an installation angle of the distance image generation unit 10. The object image generation unit 16 includes a differentiator 17 which performs a process of removing a background other than the object from the distance image of the subject and a threshold value d for removing the background in the differentiator 17 is set in response to the installation angle of the distance image generation unit 10 detected by the installation angle detection unit 20.
The purpose of the present invention is, in recording a high-quality broadcast video signal on a disc, to allow a disc storing a high-quality video signal to be reproduced at the optimum rotation speed for the disc. The purpose is achieved by a method for recording a digital video signal on a storage disc, the method comprising: a step of recording a received video signal on the storage disc as user data; a step of detecting a maximum transfer rate during reproduction from the stream of the video signal received; a step of acquiring information for setting a reproduction and transfer rate from the maximum transfer rate; and a step of recording the information for setting the reproduction and transfer rate as disc definition information.
Exemplary embodiments relate to providing an optical image measurement apparatus that is capable of acquiring information on birefringence of a sample while suppressing size and cost of the apparatus. In the present disclosure: second measurement light different from first measurement light is generated using a passive optical element that generates light of second polarization state different from first polarization state; a time when the first measurement light is irradiated onto a sample is adjusted at a first time, and a time when the second measurement light is irradiated onto the sample is adjusted at a second time different from the first time.
A laser projection display system that executes, by swinging a scan mirror, scanning with laser light of multiple colors in accordance with image signals, thereby displaying an image in accordance with the image signals, includes: a timing adjustment unit that divides temporally a display period during which the image signals are displayed and a light emission period for intensity detection to detect the intensity of the laser light; a laser light source that generates the laser light of the multiple colors; a laser light source driving unit that drives the laser light source in synchronization with a signal from the timing adjustment unit; and a scan mirror driving unit including: a first scanning means that executes scanning in a first direction in response to synchronization signals according to the image signals, with laser light generated by the laser light source through the scan mirror.
G09G 3/02 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques par traçage ou balayage d'un faisceau lumineux sur un écran
G03B 21/28 - Réflecteurs dans le faisceau de projection
Provided is a video display device that enables miniaturization of the device and gradual changes to the brightness of each of the gradation values of video. The present invention is provided with: a laser light source unit for changing an amount of light being emitted in accordance with a drive current; a video processing unit for outputting a video gradation signal, a current gain signal, and a current offset signal; a laser driver for outputting the drive current on the basis of the video gradation signal, a power source gain signal, and the current offset signal; and a dimming level processing unit for dividing dimming levels for designating the brightness of video into a plurality of dimming modes, and dividing into in-mode levels within the divided dimming modes. The video processing unit comprises: a video gradation value output unit for outputting the video gradation signal, obtained by scaling and offsetting the gradation values of video on the basis of the dimming mode and in-mode level; a current gain output unit for outputting the current gain signal, corresponding to the dimming mode; and a current offset output unit for outputting the current offset signal, corresponding to the dimming mode.
H04N 5/74 - Dispositifs de projection pour reproduction d'image, p. ex. eidophor
G03B 21/00 - Projecteurs ou visionneuses du type par projectionLeurs accessoires
G09G 3/02 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques par traçage ou balayage d'un faisceau lumineux sur un écran
93.
Laser projection display device, and method for controlling laser lightsource driving unit used for same
The laser projection display device includes: a photo-sensor for detecting the quantity of laser light generated by the laser light source; and an image processing unit for processing a drive signal on the basis of the quantity of light of the detected laser light and supplying the processed drive signal to a driving unit for the laser light source. Right after the dimming, the image processing unit supplies the drive signal to the driving unit for the laser light source on the basis of the quantity of light of the detected laser light within a second execution cycle shorter than a first execution cycle which is the execution cycle used during the normal operation.
c and irradiates the laser beams to a desired position, a cover that covers the optical module is provided, a second cover is provided in a space between the optical module and the cover, and a projecting part is provided on a surface of the second cover facing the optical module.
An image display device 1 includes a laser light source unit 10, a screen 12 formed of at least two diffusion members, a vibration mechanism 13 vibrating at least one diffusion member, and a scanning element 11 scanning laser light in a first direction (a y direction) on the screen and a second direction (an x direction) orthogonal to the first direction. A scanning speed of the scanning element 11 in the second direction is faster than a scanning speed in the first direction, and a diameter D of the laser light in the first direction on the screen is greater than an interval Yp in the first direction on the scanning trajectory in the second direction on the screen. Accordingly, it is possible to provide an image display device displaying an image having a low speckle with high luminance, without vibrating the diffusion member at a high speed.
The present invention is capable of generating a distance image having a higher accuracy. The present invention is provided with: a light emitting unit (13) that emits light toward a subject (OB) at different emission intensities; a light receiving unit (14), which picks up an image by receiving light including reflected light from the subject (OB), and calculates exposure quantities by each pixel; and a distance calculation unit, which, in a predetermined case, performs replacement between the exposure quantities at a first emission intensity and the exposure quantities at a second light emission intensity, calculates the distance to the subject (OB), and generates a distance image.
G01S 17/10 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues
The purpose of the present disclosure is to provide a small optical integrator for increasing color mixing property and homogeneity. An optical integrator is provided with a light entrance surface and exit surface (002, 003), and side surfaces (004, 005, 006, 007) that connect the entrance surface and the exit surface, and is internally filled with a light guide material having a refractive index. The light guide material contains scattering particles for scattering light that have a refractive index different from the refractive index of the light guide material. The light that has entered via the entrance surface propagates from the entrance surface side toward the exit surface while being scattered by the scattering particles in the light guide material, wherein part of the scattered light is guided to the exit surface by propagating while being confined, by internal reflection on the side surfaces, in the light detector.
An image display device includes: a light source configured to change the amount of light, depending on a driving current; and a control unit configured to, when a change is made from a first gradation value to a second gradation value, control the driving current at the second gradation value, depending on a time period for which the first gradation value is set.
G09G 3/02 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques par traçage ou balayage d'un faisceau lumineux sur un écran
G09G 3/00 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques
H04N 9/31 - Dispositifs de projection pour la présentation d'images en couleurs
A laser projection display device (1) includes a laser source (5), a laser driver (4) that drives the laser source, a scanning unit (7) that scans and projects laser light generated by the laser source, a liquid crystal element (14) that transmits the laser light at a predetermined transmittance, and a liquid crystal driver (17) that changes the transmittance by applying a voltage to the liquid crystal element. When a light quantity of the laser light generated by the laser source corresponds to a case in which the laser source operates in a nonlinear area, the laser driver shifts an operation point to an area other than the nonlinear area by increasing a driving level of the laser source by a predetermined amount G, and the liquid crystal driver decreases the transmittance of the liquid crystal element by a predetermined amount 1/G.
G02F 1/137 - Dispositifs ou dispositions pour la commande de l'intensité, de la couleur, de la phase, de la polarisation ou de la direction de la lumière arrivant d'une source lumineuse indépendante, p. ex. commutation, ouverture de porte ou modulationOptique non linéaire pour la commande de l'intensité, de la phase, de la polarisation ou de la couleur basés sur des cristaux liquides, p. ex. cellules d'affichage individuelles à cristaux liquides caractérisés par l'effet électro-optique ou magnéto-optique, p. ex. transition de phase induite par un champ, effet d'orientation, interaction entre milieu récepteur et matière additive ou diffusion dynamique
G09G 3/34 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques pour la présentation d'un ensemble de plusieurs caractères, p. ex. d'une page, en composant l'ensemble par combinaison d'éléments individuels disposés en matrice en commandant la lumière provenant d'une source indépendante
G09G 3/36 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques pour la présentation d'un ensemble de plusieurs caractères, p. ex. d'une page, en composant l'ensemble par combinaison d'éléments individuels disposés en matrice en commandant la lumière provenant d'une source indépendante utilisant des cristaux liquides
H01S 5/0683 - Stabilisation des paramètres de sortie du laser en surveillant les paramètres optiques de sortie
H01S 5/40 - Agencement de plusieurs lasers à semi-conducteurs, non prévu dans les groupes
G02B 26/02 - Dispositifs ou dispositions optiques pour la commande de la lumière utilisant des éléments optiques mobiles ou déformables pour commander l'intensité de la lumière
G09G 3/02 - Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques par traçage ou balayage d'un faisceau lumineux sur un écran
G02B 26/08 - Dispositifs ou dispositions optiques pour la commande de la lumière utilisant des éléments optiques mobiles ou déformables pour commander la direction de la lumière
A laser projection display device 1 includes a laser light source driving unit 4 setting a current which drives a laser light source according to an image signal, a light sensor 10 detecting a light amount of the laser light generated by the laser light source 5, and a light emission control unit 22 emitting light by supplying a standard image signal and a current setting signal to the laser light source driving unit and setting the laser light source driving unit such that the light amount detected by the light sensor becomes a target value. The light emission control unit supplies the current setting signal to the laser light source driving unit such that light emission is performed a plurality of times with a predetermined current difference, in a fly-back period in one frame of the image signal.
