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Backlight driving control method and system

A backlight drive and backlight technology, which is applied in the field of backlight control, can solve problems such as noise and circuit interference, and achieve the effects of reducing noise, improving interference, and avoiding drastic changes

Active Publication Date: 2020-02-11
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a backlight drive control method and system to improve technical problems such as electromagnetic field interference to circuits and noise in existing backlight drive systems

Method used

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  • Backlight driving control method and system
  • Backlight driving control method and system
  • Backlight driving control method and system

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Embodiment Construction

[0048] The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [top], [bottom], [front], [back], [left], [right], [inside], [outside], [side], etc., are only for reference The orientation of the attached schema. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention. In the figures, structurally similar elements are denoted by the same reference numerals.

[0049] image 3 Shown is a schematic flow chart of a backlight drive control method of the present invention, wherein the backlight drive control method includes:

[0050] Step S10, receiving an initial pulse width modulation signal.

[0051] Step S20, outputting a corresponding pulse width modulation signal according to the initial pulse width modulation signal, and...

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Abstract

The present invention proposes a backlight drive control method and system, comprising: receiving an initial pulse width modulation signal; outputting a corresponding pulse width modulation signal according to the initial pulse width modulation signal, and the pulse width modulation signal is used to control a corresponding LED The light string emits light, wherein, the period of each pulse width modulation signal is the same and has a preset phase difference. The present invention sets a preset phase difference for the pulse width modulation signal received by each channel in the backlight drive system, so that the LED light strings of each channel emit light in time-sharing, avoiding drastic changes in the current in the backlight drive system, and improving the backlight The interference of the electromagnetic field in the drive system to the circuit reduces the noise of the backlight drive system.

Description

technical field [0001] The present invention relates to the technical field of backlight control, in particular to a backlight driving control method and system. Background technique [0002] With the development of liquid crystal display technology, liquid crystal display screens have become important display tools, and dynamic backlight technology is widely used in liquid crystal display screens. The liquid crystal display screen needs to adopt dynamic backlight control technology to drive the backlight source, and then make the backlight source display images. [0003] figure 1 Shown is a structural diagram of an existing backlight driving system, the backlight driving system 100 includes a main control system 10, a backlight control module 20, a voltage conversion module 30 and a plurality of LED lamp strings 40; figure 2 for figure 1 The timing diagram of the pulse width modulation signal output by the middle backlight control module. [0004] When each channel (LE...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34G09G3/36H05B44/00
CPCG09G3/3406G09G3/36G09G3/342H05B45/46H05B45/38Y02B20/30H05B45/37
Inventor 张先明
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD