Patent ID: 9666145
Date: 2017-05-30
CPC Classifications: G09G,H04N

Claim:
1. An apparatus for controlling brightness compensation for pixel units of a display device, comprising: a brightness compensating circuit configured to drive white subpixels in the pixel units to compensate the pixel units for the brightness according to predetermined pixel units whose brightness is to be compensated for in the display device and compensating grayscale voltages corresponding to the brightness of the pixel units to be compensated; and a compensating grayscale voltage determining circuit configured to, before the brightness compensating circuit drives the white subpixels, determine the compensating grayscale voltages corresponding to the white subpixels in the pixel units whose brightness is to be compensated for, wherein the compensating grayscale voltage determining circuit is configured to read an initial grayscale voltage corresponding to the white subpixels in the display device, and determine the compensating grayscale voltages corresponding to the white subpixels according to the initial grayscale voltage and predetermined compensation coefficients for the grayscale voltages corresponding to the white subpixels, wherein the predetermined compensation coefficient is a ratio based on a maximum grayscale value and the grayscale value corresponding to a brightness value of the pixel unit.