公开(公告)号：US11741912B2

公开(公告)日：2023-08-29

申请号：US17255009

申请日：2020-12-18

Applicant: TCL China Star Optoelectronics Technology Co., Ltd.

Inventor： Jinfeng Liu ,  Xuebing Zhou

IPC: G09G3/34

CPC classification number: G09G3/3426

Abstract: A liquid crystal display backlight module controlling method and a controlling device thereof disclosed in the present invention includes a programmable logic gate array board extracting backlight information from an image signal. Calculation of local dimming is performed by the programmable logic gate array board, a calculation buffer for local dimming calculation is sufficient, which can increase liquid crystal display backlight divisions. Furthermore, the present invention employs a row signal and a column signal to control and switch on light emitting diodes in the backlight light board, which can achieve the cost lowering effect.