Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
J. Turner Whitted0
Michael J. Sinclair0
Eric Horvitz0
Date of Patent
September 19, 2006
0Patent Application Number
092995220
Date Filed
April 26, 1999
0Patent Primary Examiner
Patent abstract
Energy efficient transmissive and transreflective display devices use ambient light from a natural or artificial source to supplement light supplied by a backlight. Ambient light passes through a transmissive diffuser to a rear surface of a transmissive display panel. Additional energy efficiency is achieved by using one or more photo-sensors to detect the amount of ambient light and automatically adjusting the backlight intensity as a function of photo-sensor output. As a result, backlight intensity and power usage can be minimized while maintaining the viewability of images shown on the display.
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