Light control circuit and a liquid-crystal-display control...

Details Light control circuit and a liquid-crystal-display control... Light control circuit and a liquid-crystal-display control...

2006-12-14

2010-10-05

Sherman, Stephen G (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S207000

Reexamination Certificate

active

07808474

ABSTRACT:
A light control circuit that makes it possible to, when the light intensity of the area surrounding a display screen varies in a relatively short time, prevent the brightness of a backlight from being erroneously adjusted as the result of the variation being detected is provided. The light control circuit controls the backlight of a display panel. This light control circuit is provided with functions of performing the following operation: detection signals from multiple optical sensors are taken into a common sampling means in a time division manner to acquire multiple sampling values temporally dispersed; a surrounding light intensity is determined by majority decision based on the multiple sampling values, and the result of determination is externally outputted.

REFERENCES:
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patent: 5901181 (1999-05-01), LaGarde
patent: 2002/0093477 (2002-07-01), Wood
patent: 2003/0043680 (2003-03-01), Akiba et al.
patent: 2005/0162375 (2005-07-01), Koay et al.
patent: 2006/0007107 (2006-01-01), Ferguson
patent: 9-146073 (1997-06-01), None
Chinese Office Action dated Mar. 11, 2010 received in counterpart Chinese application (and English translation thereof).

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