Display brightness control device
AssigneeSapien Semiconductors Inc.
InventorsJae Hoon LEE, Sung Qwan OH
Life of this patent
Estimating the term…
Abstract
Provided is a device for controlling luminance of a display, having a simplified ACL circuit compared to the prior art. The device for controlling luminance of a display calculates the average luminance (Y_avg) when video data is input, and determines the luminance variation (ΔY) according to the average luminance. The device for controlling luminance of a display may adjust the luminance of a display by controlling a current (driving current) that is used to drive a light-emitting diode included in a pixel, instead of modifying video data for the adjustment of luminance. That is, unlike the prior art, the device for controlling luminance of a display does not modify video data, for the control of luminance.
Claims8
A display luminance control device comprising:
- an average luminance calculation unit configured to receive an input of video data constituting one frame and calculate an average luminance;
- a luminance variation calculation unit configured to calculate a luminance variation by which luminance is to be reduced when the calculated average luminance is greater than or equal to a preset reference luminance;
- and
- a driving current control unit configured to change, according to the luminance variation, an amount of driving current of a pixel driving circuit that applies a driving current to a light-emitting diode.
Dependencies are inferred from the claim text.