US 8,223,117 B2
Method and apparatus to control display brightness with ambient light correctionGeneral
US 8,223,117 B2
Method and apparatus to control display brightness with ambient light correction
Tech Center:
2600 Communications
Examiner:
Kevin M Nguyen
Art Unit:
2629 Selective Visual Display Systems
Inventors:
BRUCE R. FERGUSON
Assignee:
Priority:
02/09/04
Filed:
12/17/08
Granted:
07/17/12
Expiration:
05/30/26
Abstract
An ambient light sensor produces a current signal that varies linearly with the level of ambient light. The current signal is multiplied by a user dimming preference to generate a brightness control signal that automatically compensates for ambient light variations in visual information display systems. The multiplying function provides noticeable user dimming control at relatively high ambient light levels.
Cooperative Patent Classification (CPC)
G09G09G2320/0626G09G