Patent ID: 8760383
Filing Date: 2014-06-24
Classification: H05B

Abstract:
1. An apparatus comprising: a backlight module comprising: a light-emitting unit comprising a plurality of light-emitting diodes; and a controller, for receiving a first control signal and generating a second control signal to digitally control an average luminance of the light-emitting unit, the controller causes the second control signal to have a first frequency if a duty cycle of the first control signal is larger than a threshold value, and causes the second control signal to have a second frequency if the duty cycle of the first control signal is less than the threshold value, wherein the frequency of the first control signal is predetermined, the first frequency is equal to the frequency of the first control signal ,and the second frequency is larger than the first frequency; wherein the second control signal leads all of the light-emitting diodes of the light-emitting unit to simultaneously provide all pixels of a liquid crystal display panel the average luminance.