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Backlight adjustment method and backlight adjustment circuit

A backlight adjustment and backlight drive circuit technology, applied in instruments, static indicators, etc., can solve problems affecting display quality, uneven brightness and darkness, and achieve the effects of improving display quality, reducing power consumption, and saving power

Active Publication Date: 2018-06-01
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, usually two strings of LED light strips are included in the backlight module, and when dynamic backlight adjustment is performed at low gray levels, one of the strings of LED light strips will be turned off and only the other string of light strips will be turned on, thereby reducing power consumption. The purpose of saving power, but in this way, there will be one bright and one dark unevenness in the backlight area, that is, the firefly effect, which seriously affects the display quality

Method used

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  • Backlight adjustment method and backlight adjustment circuit
  • Backlight adjustment method and backlight adjustment circuit
  • Backlight adjustment method and backlight adjustment circuit

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Embodiment Construction

[0035] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0036] see Figure 4 , the present invention at first provides a kind of backlight adjusting method, and this method can be used on the liquid crystal display screen with CABC function, comprises the steps:

[0037] Step 1. Please refer to figure 1 and combine figure 2 , providing a backlight adjustment circuit, including a display data acquisition circuit 1, a PWM signal generation circuit 2 electrically connected to the display data acquisition circuit 1, a backlight drive circuit 3 electrically connected to the PWM signal generation circuit 2, and a backlight source 4 electrically connected to the backlight drive circuit 3;

[0038] The backlight 4 includes a first LED light string 41 and a second LED light string 42 connected in parall...

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Abstract

The invention provides a backlight adjustment method and a backlight adjustment circuit. In the low gray level, a PWM signal generated by a PWM signal generating circuit controls a backlight drive circuit to adjust a first LED lamp string and a second LED lamp string to give out light alternately. Compared with the prior art, the method and the circuit provided by the invention has the advantages that only one LED lamp string gives out light at the same moment, therefore, the power dissipation of a backlight module can be reduced, and the electric quantity can be saved; meanwhile, due to the vision persistence effect of the eyes, when the first LED lamp string and the second LED lamp string give out light alternately, the phenomenon that one part of the backlight area is bright and the other part of the backlight area is dark is avoided, the glowworm effect is avoided, and the display quality is promoted.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight adjustment method and a backlight adjustment circuit. Background technique [0002] With the development of display technology, liquid crystal displays (Liquid Crystal Display, LCD) and other flat display devices are widely used in mobile phones, televisions, personal Various consumer electronic products such as digital assistants, digital cameras, notebook computers, and desktop computers have become the mainstream of display devices. [0003] Most of the liquid crystal display devices currently on the market are backlight liquid crystal displays, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates. The direction of the liquid crystal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34
CPCG09G3/3406G09G3/3413
Inventor 邢振周左清成邹恭华
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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