A method for controlling the discharge of a photosensitive receiving means (23) in a pixel (20), in particular for optical sensors, provides that, at a pixel (20) of the type provided for a transfer gate (26) interposed between the photosensitive receiving means (23) and a read-out node (28), coupled to an element useful for providing a reference and polarization voltage (30), as well as a further transfer gate (21) for the transfer of charge from the photosensitive receiving means (23), the aforesaid further transfer gate (21) is controlled with a variable signal and preferably programmed to obtain a high dynamic of the photosensitive receiving means (23). In a photodetector (10) comprising at least one pixel (20) as outlined above, the further transfer gate (21) is controlled by means of a discharge control circuit (50) to which a charge drainage component (60) is associated.
H04N 25/59 - Commande de la gamme dynamique en commandant la quantité de charge stockable dans le pixel, p. ex. en modifiant le rapport de conversion de charge de la capacité du nœud flottant
H04N 25/621 - Détection ou réduction du bruit dû aux charges excessives produites par l'exposition, p. ex. les bavures, les éblouissements, les images fantômes, la diaphonie ou les fuites entre les pixels pour la commande des éblouissements
H04N 25/76 - Capteurs adressés, p. ex. capteurs MOS ou CMOS
H04N 25/766 - Capteurs adressés, p. ex. capteurs MOS ou CMOS comprenant des lignes de commande ou de sortie utilisées pour une pluralité de fonctions, p. ex. pour la sortie, la commande, la réinitialisation ou l'alimentation des pixels
H04N 25/771 - Circuits de pixels, p. ex. mémoires, convertisseurs A/N, amplificateurs de pixels, circuits communs ou composants communs comprenant des moyens de stockage autres que la diffusion flottante
H04N 25/533 - Commande du temps d'intégration en utilisant des temps d'intégration différents pour les différentes régions du capteur
H04N 25/58 - Commande de la gamme dynamique impliquant plusieurs expositions
H04N 25/772 - Circuits de pixels, p. ex. mémoires, convertisseurs A/N, amplificateurs de pixels, circuits communs ou composants communs comprenant des convertisseurs A/N, V/T, V/F, I/T ou I/F
An electro-optical image acquisition device (10) comprises a plurality of light-sensing sub-blocks (20), a detected signal reading block (60) for reading the output signal from said photosensitive elements (80), row and column selection elements, which enable access to different photosensitive elements (80) of the device and the reading thereof by means of said detected signal reading block (60), and pixel discharge control circuitry configured to combine a plurality of input voltage signals (40) to generate a defined number of reset curves and to dynamically select, for each photosensitive element (80), an appropriate reset curve from among those available. The device allows to obtain areas of the matrix of photosensitive elements with different light dynamics within the scene itself and to obtain so-called "multidynamic" images. This allows to both optimize the quality of the image by enabling an overall dynamic response which can even exceed the dynamics of the individual photosensitive elements and to enable schemes which allow to maximize the information content if the image is subsequently processed by a computer. In a specific and particularly advantageous embodiment, the reset curves are propagated line by line, thus allowing operation in any light condition.
H04N 5/369 - Transformation d'informations lumineuses ou analogues en informations électriques utilisant des capteurs d'images à l'état solide [capteurs SSIS] circuits associés à cette dernière
H04N 5/3745 - Capteurs adressés, p.ex. capteurs MOS ou CMOS ayant des composants supplémentaires incorporés au sein d'un pixel ou connectés à un groupe de pixels au sein d'une matrice de capteurs, p.ex. mémoires, convertisseurs A/N, amplificateurs de pixels, circuits communs ou composants communs
A digital device for image acquisition (10) comprises at least one selection decoder circuit (60) and a plurality of sub-blocks (50) each comprising one or more pixels (20) and a corresponding charge control circuit (30) which provides a circuit suitable for realizing a logic port of the AND type (31) having a selector input terminal (34) which receives the selection signal from the selection decoder circuit (60) and a suitable enabling input terminal (35) to receive an enabling signal; and interruption organs (32) connected to the reset terminal (21) of the pixel (20) to transmit a reset signal constituted alternatively by a signal output from the aforesaid circuit suitable for realizing a logic port of the AND type (31) or from a global reset signal transmitted to a corresponding global reset terminal (38). The reset signal of a sub-block can be controlled directly by the selection decoder (60), while the global signal transmitted to the global reset terminal (38) may be a digital signal suitable for performing a global reset of all the pixels of the device; it can be an analog global signal of the type suitable to limit the blooming effect or to obtain high dynamics.
H04N 5/359 - Traitement du bruit, p.ex. détection, correction, réduction ou élimination du bruit appliqué aux porteurs de charge en excès générés par l'exposition, p.ex. bavure, tache, image fantôme, diaphonie ou fuite entre les pixels
H04N 5/3745 - Capteurs adressés, p.ex. capteurs MOS ou CMOS ayant des composants supplémentaires incorporés au sein d'un pixel ou connectés à un groupe de pixels au sein d'une matrice de capteurs, p.ex. mémoires, convertisseurs A/N, amplificateurs de pixels, circuits communs ou composants communs
4.
PIXEL CHARGE CONTROL CIRCUIT IN DIGITAL DEVICES FOR IMAGES ACQUISITION
A digital device for image acquisition (10) comprises at least one selection decoder circuit (60) and a plurality of sub-blocks (50) each comprising one or more pixels (20) and a corresponding charge control circuit (30) which provides a circuit suitable for realizing a logic port of the AND type (31) having a selector input terminal (34) which receives the selection signal from the selection decoder circuit (60) and a suitable enabling input terminal (35) to receive an enabling signal; and interruption organs (32) connected to the reset terminal (21) of the pixel (20) to transmit a reset signal constituted alternatively by a signal output from the aforesaid circuit suitable for realizing a logic port of the AND type (31) or from a global reset signal transmitted to a corresponding global reset terminal (38). The reset signal of a sub-block can be controlled directly by the selection decoder (60), while the global signal transmitted to the global reset terminal (38) may be a digital signal suitable for performing a global reset of all the pixels of the device; it can be an analog global signal of the type suitable to limit the blooming effect or to obtain high dynamics.
A61K 8/49 - Cosmétiques ou préparations similaires pour la toilette caractérisés par la composition contenant des composés organiques contenant des composés hétérocycliques
A61K 8/97 - Cosmétiques ou préparations similaires pour la toilette caractérisés par la composition contenant des produits de constitution indéterminée ou leurs dérivés à base d’algues, de champignons, de lichens ou de plantesCosmétiques ou préparations similaires pour la toilette caractérisés par la composition contenant des produits de constitution indéterminée ou leurs dérivés à base de leurs dérivés
A61Q 19/00 - Préparations pour les soins de la peau
A61K 31/192 - Acides carboxyliques, p. ex. acide valproïque ayant des groupes aromatiques, p. ex. sulindac, acides 2-aryl-propioniques, acide éthacrynique
A61K 31/375 - Acide ascorbique, c.-à-d. vitamine CSes sels
A61K 31/7048 - Composés ayant des radicaux saccharide et des hétérocycles ayant l'oxygène comme hétéro-atome d'un cycle, p. ex. leucoglucosane, hespéridine, érythromycine, nystatine
Photo-detector device for electro-optical sensors, comprising at least a detection and conversion circuit, or pixel (20), having at least a photo-sensitive reception mean (26) and a reset control terminal (11), which is able to drive an element to control the charge dissipation (23) of the photo-sensitive reception mean (26). The pixel (20) is able to convert the current generated by the photo-sensitive reception mean (26) into a voltage signal on a read-out terminal (28). The photo-detector device also comprises a circuit for controlling the reset voltage (40), able to generate a suitable input signal to the reset control terminal (11) by connecting it alternatively to a reset terminal (42) or to an external reference terminal (47), the input signal to said external reference terminal (47) is the type that can be programmed from outside. Furthermore, the circuit for controlling the reset voltage (40) can be shared between a subset of detection and control circuits (20).
Photo-detector device for electro-optical sensors, comprising at least a detection and conversion circuit, or pixel (20), having at least a photo-sensitive reception mean (26) and a reset control terminal (1 1), which is able to drive an element to control the charge dissipation (23) of the photo-sensitive reception mean (26). The pixel (20) is able to convert the current generated by the photo-sensitive reception mean (26) into a voltage signal on a read-out terminal (28). The photo- detector device also comprises a circuit for controlling the reset voltage (40), able to generate a suitable input signal to the reset control terminal (11) by connecting it alternatively to a reset terminal (42) or to an external reference terminal (47), the input signal to said external reference terminal (47) is the type that can be programmed from outside. Furthermore, the circuit for controlling the reset voltage (40) can be shared between a subset of detection and control circuits (20).
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