A mode-switchable backlighting unit is disclosed, which comprises a first and second array of one or more lights sources and a transparent light guide, with the transparent light guide comprising an array of extraction features which form a light output surface, the extraction features comprising an asymmetric shape. The mode-switchable backlighting unit has at least two switchable modes of operation which provide an output beam having a first and second angle of divergence, the second angle of divergence being larger than the first angle of divergence. This allows for at least two different and switchable beam angle distributions to be delivered by a single light-guide backlighting unit. The mode-switchable backlighting unit has several advantages, including reduced thickness and improved energy efficiency.
F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage
G02F 1/13 - 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
A pixelated lighting device (8) comprising one or more light sources (10) embedded within a composite light-guide is disclosed. The pixelated lighting device incorporates refractive light barriers (15) to achieve contrast between adjacent pixels (16a, 16b). These features combine to provide a pixelated lighting device with an acceptable contrast ratio and with a very high fill factor. The structure of the pixelated lighting device means that it can be manufactured as a very thin device so making it particularly suited
A lighting device includes a light guide having a light output surface, one or more LED packages having two or more spatially separated LED chips, and two or more wavelength dependent modification features located on the output surface of the light guide. Each wavelength dependent modification features is configured to modify the intensity of light from one or more of the LED chips to provide homogeneous colored light.
A pixelated lighting device (8) comprising one or more light sources (10) embedded within a composite light-guide is disclosed. The pixelated lighting device incorporates refractive light barriers (15) to achieve contrast between adjacent pixels (16a, 16b). These features combine to provide a pixelated lighting device with an acceptable contrast ratio and with a very high fill factor. The structure of the pixelated lighting device means that it can be manufactured as a very thin device so making it particularly suited for use within the field of transportation.
F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage
F21K 9/61 - Agencements optiques intégrés dans la source lumineuse, p. ex. pour améliorer l’indice de rendu des couleurs ou l’extraction de lumière en utilisant des guides de lumière
F21S 4/20 - Dispositifs ou systèmes d'éclairage utilisant une guirlande ou une bande de sources lumineuses avec les sources lumineuses maintenues par ou à l'intérieur de supports allongés
A lighting device (21) comprising a light guide (12) and LED packages (1) having two or more spatially separated LED chips (2,3,4) is described. The LED packages (1) generate two or more light outputs at two or more separate wavelengths which are optically coupled into the light guide (12). A portion of the two or more light outputs exit the light guide (12) via a light output surface (14). Wavelength dependent modification features (22) are arranged to modify the intensity of at least one of the two or more light outputs to provide the lighting device (21) with a homogeneous colour light output. The LED packages (1) may comprise RGB LED packages, and the wavelength dependent modification features (22) are arranged to provide a homogeneous white light output. This provides a lighting device (21) capable of providing low intensity light levels over a large surface area which are thinner and cheaper to produce than those devices known in the art.
A uniform lighting device comprising light sources embedded within a planar light-guide is disclosed. The uniform light device incorporates a light reduction medium located on the planar light guide, the function of which is to reduce the intensity of light rays generated by the light sources, and which are not coupled into the planar light-guide, before they exit a light output surface of the device. A light extraction medium is also located on the planar light guide, the function of which is to extract light rays generated by the light sources, and which are coupled into the planar light-guide, via the light output surface. These features combine to provide a lighting device with a highly uniform light output. The structure of uniform lighting device means that it can be manufactured as a very thin device so making it particularly suited for use within the field of transportation.
An illuminated eyewear device is described. The illuminated eyewear device comprises a transparent substrate and one or more light sources mounted around the perimeter of the transparent substrate. The output of the one or more light sources is arranged to be coupled into, and propagates within, the transparent substrate. Applied to an inner surface of the transparent substrate are a plurality of refractive light scattering means designed to break the condition for total internal reflection of the light generated by the one or more light sources. As well as being mobile, compact and easy to integrate into everyday life, the above described illuminated eyewear device address the known problem of glare experienced by users of those devices known in the art since the light sources are not directly imaged into the user eye.
A61M 21/00 - Autres dispositifs ou méthodes pour amener un changement dans l'état de conscienceDispositifs pour provoquer ou arrêter le sommeil par des moyens mécaniques, optiques ou acoustiques, p. ex. pour mettre en état d'hypnose
8.
Modular light panel having light sources and environemental sensor units
A modular light panel includes a transparent base substrate, an array of light sources, at least one environment sensor unit mounted on the base substrate, and a transparent protecting layer encapsulating the light sources and the environment sensor unit(s). The refractive index of the transparent protecting layer is equal or less than that of the base substrate. The modular light panel might also include a wireless communication module.
F21V 23/04 - Agencement des éléments du circuit électrique dans ou sur les dispositifs d’éclairage les éléments étant des interrupteurs
A61B 5/024 - Mesure du pouls ou des pulsations cardiaques
F21S 8/02 - Dispositifs d'éclairage destinés à des installations fixes encastrables, p. ex. plafonniers à spots lumineux
A61B 5/00 - Mesure servant à établir un diagnostic Identification des individus
F21V 3/04 - GlobesVasquesVerres de protection caractérisés par les matériaux, traitements de surface ou revêtements
F21V 33/00 - Combinaisons structurales de dispositifs d'éclairage avec d'autres objets, non prévues ailleurs
G01K 3/14 - Thermomètres donnant une indication autre que la valeur instantanée de la température fournissant des différences de valeursThermomètres donnant une indication autre que la valeur instantanée de la température fournissant des valeurs différenciées par rapport à l'espace
An illuminated eyewear device is described. The illuminated eyewear device comprises a transparent substrate and one or more light sources mounted around the perimeter of the transparent substrate. The output of the one or more light sources is arranged to be coupled into, and propagates within, the transparent substrate. Applied to an inner surface of the transparent substrate are a plurality of refractive light scattering means designed to break the condition for total internal reflection of the light generated by the one or more light sources. As well as being mobile, compact and easy to integrate into everyday life, the above described illuminated eyewear device address the known problem of glare experienced by users of those devices known in the art since the light sources are not directly imaged into the user eye.
A modular light panel is described that comprises a transparent base substrate, upon a first surface of which is mounted an array of light sources, and a transparent protecting layer arranged to encapsulate the light sources upon the first surface. The refractive index of these layers is such that they form a composite structure for guiding light produced by the light sources within the composite structure. The modular light panel also comprise a wireless communication module and or environment sensor units located on the first surface to measure one or more physical properties of a volume illuminated by the light sources. The modular light panel exhibits increased levels of light output, are easier to manufacture than known devices while offering increased functionality. In addition, they remove the need for separate dedicated environment sensor units to be employed in a room while providing a means for thermally mapping the room.
Lighting apparatus and installations; lighting apparatus and
devices for automobiles; light-emitting diodes [LED] lights;
light emitting diode lights for automobiles; street lamps;
safety lamps for underground use; germicidal lamps for
purifying air; neon lamps; lanterns; dynamo lamps; fittings
for discharge lamps; incandescent lamps; incandescent lamp
fittings; ultraviolet ray lamps, not for medical purposes;
germicidal lamps; chandeliers; water surface lamps; mercury
lamps; aquarium lights; spotlights; arc lamps; safety lamps;
diving lights; decoration lamps; infrared lamps; torches for
lighting; fish gathering lamp; ceiling lights; fairy lights
for festive decoration; electric lights for Christmas trees;
standard lamps; searchlights; artificial solar lamp;
floodlights; fluorescent lamps; flashlights [torches];
lights for motorcycles; automobile lights; reflectors for
automobiles; lamps for directional signals of automobiles;
electric bulbs for directional signals of automobiles;
fluorescent lamp tubes; miniature light bulb; filaments for
electric lamps; sockets for electric lights; headlights for
automobiles; parts and fittings for all the aforesaid goods.
09 - Appareils et instruments scientifiques et électriques
10 - Appareils et instruments médicaux
11 - Appareils de contrôle de l'environnement
16 - Papier, carton et produits en ces matières
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Scientific and optical apparatus and instruments; display screens and monitors; flat panel display devices; digital signage monitors; light emitting diode displays; organic light emitting display devices; liquid crystal display devices; light-emitting diodes LED; televisions; television monitors; television screens; displays for television receivers; display modules for television receivers; electronic control panels; electronic communication equipment and instruments; interfaces for computers; cameras; digital cameras; motion recognizing sensors; pressure sensors; lighting control apparatus; batteries; light conducting filaments optical fibers; remote controllers; remote controllers for controlling electronic products; parts and fittings for all the aforesaid goods. Medical, surgical and veterinary apparatus and instruments; medical, surgical and veterinary irradiation and lighting apparatus; infra-red and ultra-violet ray apparatus and heat lamps, all for medical, surgical and veterinary purposes; display screens for medical purposes; parts and fittings for all the aforesaid goods. Lighting apparatus and installations; lighting apparatus and devices for automobiles; light-emitting diodes LED lights; light emitting diode lights for automobiles; street lamps; safety lamps for underground use; germicidal lamps for purifying air; neon lamps; lanterns; dynamo lamps; fittings for discharge lamps; incandescent lamps; incandescent lamp fittings; ultraviolet ray lamps, not for medical purposes; germicidal lamps; chandeliers; water surface lamps; mercury lamps; aquarium lights; spotlights; arc lamps; safety lamps; diving lights; decoration lamps; infrared lamps; torches for lighting; fish gathering lamp; ceiling lights; fairy lights for festive decoration; electric lights for Christmas trees; standard lamps; searchlights; artificial solar lamp; floodlights; fluorescent lamps; flashlights torches; lights for motorcycles; automobile lights; reflectors for automobiles; lamps for directional signals of automobiles; electric bulbs for directional signals of automobiles; fluorescent lamp tubes; miniature light bulb; filaments for electric lamps; sockets for electric lights; headlights for automobiles; parts and fittings for all the aforesaid goods. Paper; cardboard; printed matter; instructional and teaching material (except apparatus); apparatus for mounting photographs; graphic prints; graphic representations; graphic reproductions; luminous paper; periodical magazines; magazines (publication); manuals handbooks; newsletters; paper and cardboard; paper on which a hologram is formed; paper patterns; paper sheets (stationery); printed sheets on which a hologram is formed; stationery materials; stationery; teaching materials (except apparatus). Scientific and technological services, research and design relating to these services; lighting research, design and consultancy services; display screen research, design and consultancy services; research and development of electric power resources; research and development of solar batteries and solar battery modules; design of electrical power installations; research and development of home appliances.
This invention relates to a light guide plate and methods of manufacture. The light guide plate is suitable for use in a range of applications, particularly those which require backlighting for display units, for example, liquid crystal displays. The light guide plate comprises a combination of light guide layers and one or more scattering features.
A lighting panel that provide an alternative means for producing a "spot light" like illumination from an LED is described. The lighting panel comprising a transparent substrate upon a first surface of which are mounted a plurality of transparent prism structures and upon a second surface of which is mounted a light emitting diode (LED). A transparent guide layer is arranged so as to encapsulate the light emitting diode upon the second surface such that the transparent base substrate and the transparent guide light form a composite structure for guiding light emitted from the LED. The transparent prism structures are configured to extract a first and a second light output from the lighting panel, the first and second light outputs having output angles and beam widths determined by the structure of the plurality of transparent prism structures. The lighting panels exhibit high optical efficiencies and long operating lifetimes.
A light guide device for illumination, lighting and display purposes that exhibits an output light having a predetermined, and preferably uniform, angular luminance profile is described. The device comprises a light guide (13) suitable for guiding light coupled thereto and a plurality of extraction features (10, 11) located on one or more surfaces of the light guide. The plurality of extraction features comprises an interleaved pattern of first (11) and second extraction features the arrangement of which provides a means for defining the predetermined angular and spatial luminance profiles for the output light. The device allows for a uniform angular luminance profile to be produced that is maintained even when the light guide is curved or bent.
F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage
F21V 17/04 - Fixation des parties constitutives des dispositifs d'éclairage, p. ex. des abat-jour, des globes, des réfracteurs, des réflecteurs, des filtres, des écrans, des grilles ou des cages de protection sur la source lumineuse ou par son intermédiaire
A lighting panel and method of production thereof is described. The lighting panel comprises a transparent substrate (7), upon a first surface of which are mounted one or more light sources (1) is described. The lighting panel further comprises a guide layer (9) wherein the guide layer is arranged so as to encapsulate the one or more light sources upon the first surface. The one or more light sources comprise top emitting LEDs side mounted upon the first surface. In this way the described apparatus provides an optically efficient means for providing "warm white" backlighting of products that can be manufactured on a commercial scale while offering acceptable levels of reliability.
This invention relates to light guide devices and methods of manufacture. The light guide device is suitable for use in a range of applications, particularly in connection with the backlighting of displays, for example, liquid crystal displays.
A light guide device for illumination, lighting and display purposes that exhibits an output light having a predetermined, and preferably uniform, angular luminance profile is described. The device comprises a light guide (13) suitable for guiding light coupled thereto and a plurality of extraction features (10, 11) located on one or more surfaces of the light guide. The plurality of extraction features comprises an interleaved pattern of first (11) and second extraction features the arrangement of which provides a means for defining the predetermined angular and spatial luminance profiles for the output light. The device allows for a uniform angular luminance profile to be produced that is maintained even when the light guide is curved or bent.
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
F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage
A lighting apparatus that provides an energy efficient illumination source that is suitable for use as an interior, ambient lighting source is described. The lighting apparatus comprising a light guide ( 2 ) suitable for guiding light coupled to a first surface ( 3 ) to a second surface of the light guide thus providing a first light output ( 7a) emitted from the second surface ( 6a). The light guide further comprises a plurality of extraction features ( 10 ) located on a further surface thereof the extraction features being arranged so as to redirect a portion of the guided light so as to provide a second light output that is more diffuse than the first light output.
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
F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage
20.
Method of producing a composite light guiding device
A light guiding device and in particular to a light guiding device that can be used for illumination, backlighting, signage or display purposes is described. The light guiding device comprises a transparent base substrate, upon a first surface of which are mounted light sources, and a guide substrate arranged so as to encapsulate the light sources upon the first surface. In this way the guide substrate provides a means for guiding light produced by the one or more light sources over the first surface. The incorporation of scattering structures along with appropriate choice of the refractive indices of the various layers provides a highly flexible light guiding device that is typically less than 1 mm thick. The described light guiding device provides particular application as a seven segment display.
A light-guide apparatus comprising a light-guide plate for guiding light rays and a plurality of light extraction features is described. The light extraction features comprise a transparent material applied to the light-guide plate so as to form an uneven surface. The transparent material may comprise a textured ink applied to the surface of the light-guide plate via a printing process. The incorporation of an uneven surface provides micro-lens like elements on the surface of the extraction feature which have a higher aspect ratio and so lend themselves to the refraction of the light out of the light-guide plate. In this way a device is produced wherein the size, height, location and surface profile of the extraction features can be carefully controlled. As a result the described light-guide apparatus provides for a highly efficient and relatively uniform light output.
s, provides the same desired uniform illumination in alternative embodiments. The capacitive sensing apparatus finds particular application within a touch sensitive display.
This invention relates to a light guide device and methods of manufacture. The light guide device is suitable for use in a range of applications, particularly in connection with the backlighting of displays, for example, liquid crystal displays. The light guide device comprises a combination of guide layers and one or more scattering structures in order to mask the appearance of one or more light sources.
A light-guide apparatus comprising a light-guide plate for guiding light rays and a plurality of light extraction features is described. The light extraction features comprise a transparent material applied to the light-guide plate so as to form an uneven surface. The transparent material may comprise a textured ink applied to the surface of the light-guide plate via a printing process. The incorporation of an uneven surface provides mirco-lens like elements on the surface of the extraction feature which have a higher aspect ratio and so lend themselves to the refraction of the light out of the light-guide plate. In this way a device is produced wherein the size, height, location and surface profile of the extraction features can be carefully controlled. As a result the described light-guide apparatus provides for a highly efficient and relatively uniform light output.
F21V 8/00 - Utilisation de guides de lumière, p. ex. dispositifs à fibres optiques, dans les dispositifs ou systèmes d'éclairage
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
A capacitive sensing apparatus is described that incorporates a light guide having a light scattering means for illumination of the apparatus. The apparatus has a capacitive sensor mounted on a substrate that provides a capacitive sensing area for generating an electric field that emanates from the apparatus. A light source is arranged in optical communication with the light scattering means via the light guide. This arrangement acts to mitigate the effects of interference between the capacitive sensor and the light source. When an opaque substrate is employed an air gap is located between the substrate and the light guide so as to provide a substantially uniform illumination across the light guide. Appropriate selection of the refractive indices of the light guide, ng, and a transparent substrate, ns, provides the same desired uniform illumination in alternative embodiments. The capacitive sensing apparatus finds particular application within a touch sensitive display.
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
A light guiding device (1) and in particular to a light guiding device that can be used for illumination, backlighting, signage or display purposes is described. The light guiding device (1) comprises a transparent base substrate (2), upon a first surface of which are mounted light sources (3), and a guide substrate (4) arranged so as to encapsulate the light sources (3) upon the first surface. In this way the guide substrate (4) provides a means for guiding light produced by the one or more light sources over the first surface. The incorporation of scattering structures (5) along with appropriate choice of the refractive indices of the various layers provides a highly flexible light guiding device that is typically less than 1 mm thick. The described light guiding device (1) provides particular application as a seven segment display.
A light guiding device (1) and in particular to a light guiding device that can be used for illumination, backlighting, signage or display purposes is described. The light guiding device (1) comprises a transparent base substrate (2), upon a first surface of which are mounted light sources (3), and a guide substrate (4) arranged so as to encapsulate the light sources (3) upon the first surface. In this way the guide substrate (4) provides a means for guiding light produced by the one or more light sources over the first surface. The incorporation of scattering structures (5) along with appropriate choice of the refractive indices of the various layers provides a highly flexible light guiding device that is typically less than 1mm thick. The described light guiding device (1) provides particular application as a seven segment display.
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
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
