Local area dimming driving circuit, method and system and electronic equipment

A technology of dimming drive and dimming control circuit, which is applied to instruments, static indicators, etc., can solve the problem of display panel stroboscopic and other problems, and achieve the effect of avoiding picture stroboscopic, realizing smooth switching of pictures, and stable display effect.

Active Publication Date: 2022-02-08
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a local dimming drive circuit, method, system and electronic equipment, aiming at solving the problem of the vertical synchronization signal frequency switching of the display panel. There is a problem with flickering

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  • Local area dimming driving circuit, method and system and electronic equipment
  • Local area dimming driving circuit, method and system and electronic equipment
  • Local area dimming driving circuit, method and system and electronic equipment

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Embodiment Construction

[0038] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positi...

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Abstract

The invention discloses a local dimming driving circuit, method and system and electronic equipment. The local dimming driving circuit comprises a dimming control circuit and a constant-current driving circuit; the input end of the dimming control circuit is connected with the mainboard, the output end of the dimming control circuit is connected with the input end of the constant-current driving circuit, and the output end of the constant-current driving circuit is connected with the backlight lamp panel; the main board is used for providing first backlight brightness data and a first vertical synchronizing signal; the dimming control circuit is used for obtaining second backlight brightness data according to the first backlight brightness data and outputting the second backlight brightness data at the refresh frequency of the first vertical synchronizing signal, and is also used for outputting a second vertical synchronization signal, wherein the refresh frequency of the second vertical synchronization signal is a preset value greater than the refresh frequency of the first vertical synchronization signal; and the constant-current driving circuit is used for driving the backlight lamp panel to display according to the second backlight brightness data when receiving the second vertical synchronizing signal. The stroboscopic problem of the display panel is improved, and picture switching is smoother.

Description

technical field [0001] The present invention relates to the field of display driving, in particular to a local dimming driving circuit, method, system and electronic equipment. Background technique [0002] VRR (Variable Refresh Rate, variable refresh rate) technology can effectively improve the display effect of the display panel. The refresh rate of conventional display screens is 50 / 60 / 100 / 120Hz. In order to ensure that the screen is synchronized with the backlight, the refresh rate of the brightness of the backlight (that is, the current driven by constant current) needs to be synchronized with the screen refresh rate of the motherboard display screen. Meet the needs of high dynamic contrast and high dynamic range images. [0003] At present, the common constant current driving scheme is to adjust the parameters of the register configuration related to the driving current in the backlight driving circuit, so as to realize the frequency matching of different vertical syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34
CPCG09G3/3406G09G3/3413
Inventor 盘桥富周建华胡向峰杨文祥黄德强李亚伟
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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