Patent ID: 8890798
Filing Date: 2014-11-18
Classification: G09G

Abstract:
1. A backlight control system for use in an electronic device including a display having a backlight arranged to illuminate the display, wherein the display includes display pixels mounted on a given layer in the display, the backlight control system comprising: a backlight controller arranged to turn the backlight temporarily off and then back on while the backlight is in an illumination state in which the backlight illuminates the display; an ambient light sensor adapted to sense an ambient light intensity when the backlight is temporarily off during the illumination state, and to provide an indication thereof to the backlight controller, wherein the ambient light sensor is mounted on the given layer of the display and is adjacent to at least one of the display pixels, wherein the backlight controller includes a backlight switch configured to set the backlight to an ON or OFF state according to a backlight-off frequency when the backlight is in the illumination state; first computer code adapted to determine a periodicity of the visual display; second computer code for determining the backlight-off frequency based on the periodicity of the visual display such that the backlight-off frequency is at a non-integer ratio with respect to the periodicity of the visual display; and third computer code for controlling the backlight switch in accordance with the backlight-off frequency.