Display device and display device drive method

G - Physics – 09 – G

Patent

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Details

G09G 3/30 (2006.01) G09G 3/20 (2006.01) H01L 51/50 (2006.01) H04N 5/66 (2006.01)

Patent

CA 2691518

A display device is provided that includes a pixel that has a light emitting element that emits light in accordance with an amount of an electric current and a pixel circuits that controls, in accordance with a video signal, an electric current that is applied to the light emitting element, a scanning line that supplies to the pixel, in a specified scan cycle, a selection signal that selects the pixel that will emit light, a data line that supplies a video signal to the pixel, and a display portion in which drive transistors to which the video signal is supplied are arranged in the form of a matrix. The display device also includes a gamma conversion portion that converts the video signal such that it has a gamma characteristic, and a transistor control portion that controls current-voltage characteristics of the transistors such that the gamma characteristic of the signal that is converted by the gamma conversion portion becomes a linear characteristic when it is multiplied by the current-voltage characteristics of the transistors.

L'invention porte sur un dispositif d'affichage qui comporte une section d'affichage comprenant des pixels comportant des éléments émetteurs de lumière émettant spontanément de la lumière en fonction d'une valeur de courant et des circuits de pixel pour commander un courant qui doit être appliqué aux éléments émetteurs de lumière en fonction d'un signal vidéo ; des lignes de balayage pour délivrer un signal de sélection, qui sélectionne un pixel qui doit provoquer une émission, aux pixels à un cycle de balayage prédéterminé ; des lignes de données pour délivrer le signal vidéo aux pixels ; et des transistors recevant le signal de sélection et commandant les pixels, tous ces éléments étant disposés sous une forme matricielle. Le dispositif d'affichage comprend un transformateur gamma pour transformer le signal vidéo de telle sorte qu'il a une caractéristique gamma, et un dispositif de commande de transistor pour commander les caractéristiques courant-tension des transistors de façon à avoir une caractéristique linéaire si la caractéristique gamma du signal transformé par le transformateur gamma est multipliée par les caractéristiques courant-tension des transistors.

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