US 12,288,532 B2
Backlight compensation method, device and system, and non-transitory computer-readable storage medium
Kiwon Lee, Beijing (CN); Jihoon Park, Beijing (CN); Youngjin Lim, Beijing (CN); and Chenghui Yan, Beijing (CN)
Assigned to Beijing Xianxin Technology Co., Ltd, Beijing (CN)
Filed by Beijing Xianxin Technology Co., Ltd, Beijing (CN)
Filed on Jan. 26, 2024, as Appl. No. 18/423,321.
Application 18/423,321 is a continuation of application No. PCT/CN2022/107596, filed on Jul. 25, 2022.
Claims priority of application No. 202110846033.8 (CN), filed on Jul. 26, 2021.
Prior Publication US 2024/0161707 A1, May 16, 2024
Int. Cl. G09G 3/34 (2006.01)
CPC G09G 3/3426 (2013.01) [G09G 2320/0233 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A backlight compensation method for compensating brightness of a plurality of mini-LEDs in a backlight unit, wherein the plurality of mini-LEDs comprise M rows and N columns, both M and N are positive integers greater than 1, and the backlight compensation method comprises:
acquiring a control signal for controlling the brightness of the backlight unit, and acquiring a row compensation value corresponding to mini-LEDs in each row and a column compensation value corresponding to mini-LEDs in each column;
compensating the mini-LEDs in each row and the mini-LEDs in each column according to the row compensation value and the column compensation value to obtain a compensated control signal; and
controlling the brightness of the backlight unit according to the compensated control signal,
wherein the control signal comprises backlight image data sent by a timing controller to a dimmer controller, and also comprises a duty ratio and/or a current value sent by the dimmer controller to an LED driver;
the compensating the mini-LEDs in each row and the mini-LEDs in each column according to the row compensation value and the column compensation value to obtain the compensated control signal comprises:
compensating, by the dimmer controller, the backlight image data corresponding to the mini-LEDs in each row according to the row compensation value to obtain compensated backlight image data, and determining the duty ratio and/or the current value according to the compensated backlight image data and sending the duty ratio and/or the current value to the LED driver; and
compensating, by the LED driver, the duty ratio and/or the current value of the mini-LEDs in each column according to the column compensation value, so as to generate a corresponding PWM signal according to the compensated duty ratio and/or the compensated current value to control a corresponding brightness of each mini-LED.