Liquid crystal television apparatus

Details Liquid crystal television apparatus Liquid crystal television apparatus

2007-10-16

2007-10-16

Lee, Michael H. (Department: 2622)

Television

Image signal processing circuitry specific to television

Gray scale transformation

C348S790000, C348S690000, C348S712000

Reexamination Certificate

active

10866619

ABSTRACT:
Disclosed herein is a video signal process circuit that includes a control circuit having a level detection circuit and a dynamic range switch circuit. In the control circuit and a microcomputer, an average luminance of an image displayed on a liquid crystal panel via a liquid crystal driver circuit is detected. When the average luminance is equal to or over a level YSmax, an upper limit of the dynamic range is expanded, so that a signal level of a composite video signal in which white blur can occur can be digitized to a digital signal without being limited by the upper limit gradation, reducing the white blur of the image to improve the quality of the image.

REFERENCES:
patent: 6201566 (2001-03-01), Harada et al.
patent: 6850214 (2005-02-01), Nishitani et al.
patent: 7095451 (2006-08-01), Kitazawa et al.
patent: H11-177903 (1999-07-01), None

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