Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2006-11-14
2006-11-14
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S904000, C345S690000
Reexamination Certificate
active
07136076
ABSTRACT:
A system and method are described herein for controlling the white balance and providing gamma correction without compromising gray-scale dynamic range in a flat panel liquid crystal display (LCD). According to one embodiment of the present invention, the flat panel LCD includes electronic circuitry for coupling to a host computer to receive a white-balance adjustment control signal, and electronic circuitry for receiving image data to be rendered on the flat panel LCD. Further, the flat panel LCD of one embodiment is configured for coupling to a color-sensing device to receive optical characteristics data of the flat panel LCD detected by the color-sensing device. The white balance adjustment mechanisms include the provision of two or more light sources of differing color temperature, whose brightness can be independently varied (and distributed through a light distribution mechanism) to adjust color temperature without altering the grayscale resolution of the RGB colors. The present invention further includes white balance adjustment software and gamma correction software for generating white-balance adjustment control signals and appropriate gamma correction curves.
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“White Balance Control Methods on Liquid Crystal Display”, IBM Technical Disclosure Bulletin, vol. 37, No. 11, Nov. 1, 1994, p. 425/426.
Evanicky Daniel E.
Medina Oscar Ivan
Baker & Botts L.L.P.
Hjerpe Richard
Nguyen Kevin M.
Silicon Graphics Inc.
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