Patent ID: 7825891
Filing Date: 2010-11-02
Classification: G09G

Abstract:
1. A backlight control system for use with an electronic display comprising: an ambient light sensor for sensing an ambient light intensity; a backlight for illuminating the electronic display; a switch for controlling the backlight, the switch configured to set a backlight condition to ON or OFF according to a backlight-off frequency, the ambient light sensor sensing the ambient light intensity only when the backlight condition is set to the OFF and when in absence of light provided by the backlight, wherein said backlight-off frequency results in a recurring backlight-off interval, and wherein said backlight-off interval corresponds to a fraction of the time for a frame refresh of said electronic display; at least one of a set of circuitry and a software module for determining a backlight level in response to the ambient light intensity; and a backlight control circuit for adjusting the backlight to the backlight level in response to the ambient light intensity.