Self-adapting method for adjusting brightness in liquid crystal TV set

A technology for adjusting the brightness of LCD TVs, which is applied in the field of TVs. It can solve the problems that users cannot choose to control the backlight, there is no AI switch provided by users, and the LCD TV has poor layering, so as to improve the display effect and improve the subjective contrast. , Improve the effect of subjective contrast

Inactive Publication Date: 2005-11-16
HISENSE +1
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  • Application Information

AI Technical Summary

Problems solved by technology

Compared with CRT and plasma display, liquid crystal display has obvious gaps in contrast, which makes the display effect of liquid crystal TV have poor layering and insufficient picture transparency.
[0003] In addition, ...

Method used

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  • Self-adapting method for adjusting brightness in liquid crystal TV set
  • Self-adapting method for adjusting brightness in liquid crystal TV set
  • Self-adapting method for adjusting brightness in liquid crystal TV set

Examples

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Embodiment 1

[0028] Example 1. A kind of self-adaptive brightness adjusting method of liquid crystal television, such as Figure 1 to Figure 4 shown. It includes the following steps:

[0029] (1) According to the setting of the program, the CPU of the LCD TV outputs a PWM square wave signal with a specific period and duty cycle. After filtering and shaping circuit, it becomes a certain DC level as an external brightness control signal. Sent to the digital video image processing and judging module;

[0030] (2) The CPU simultaneously outputs the switch high and low level signals of adaptive brightness adjustment AI to the digital video image processing and judgment module to control the switch of the AI ​​function;

[0031] (3) Output the adaptive brightness control signal from the digital video image processing and judging module to the brightness control pin of the backlight, so as to finally realize the adaptive brightness control of the whole LCD TV.

[0032] Above-mentioned step (3...

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PUM

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Abstract

The invention includes following parts: (1) based on setting of program, CPU outputs signal of PWM square wave signal with specific cycle and duty ratio; after filtering and waveshaping, the output signal becomes a certain DC level, which is as external brightness control signal to be sent to digital video image process and judgment module; (2) meanwhile, CPU outputs high and low level signal for switch of self-adapting brightness control to the said digital module; (3) the said digital module outputs signal of self-adapting brightness control to brightness control pins of back light lamps so as to realize control step. The invention improves subjective contrast of image frame, and increases layer level feeling and penetrating brightness under condition of without changing contrast of LCD self. The invention improves display effect, applicable to each type of liquid crystal TV set.

Description

technical field [0001] The invention belongs to the technical field of televisions, and more specifically relates to the design of an adaptive brightness adjustment method for liquid crystal televisions, that is, the application of liquid crystal displays, the control of liquid crystal televisions and digital video processing technology. Background technique [0002] With the development of display technology, new display devices have gradually replaced traditional CRT monitors, occupying more and more shares in the TV market. Liquid crystal display is an important kind of new display device. With the improvement of cost performance, LCD TVs have experienced rapid growth in the past two years. Compared with CRT and plasma display, liquid crystal display has a relatively obvious gap in contrast, which makes the display effect of liquid crystal TV have the disadvantages of poor layering and insufficient picture transparency. [0003] In addition, trad...

Claims

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Application Information

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IPC IPC(8): H04N5/57
Inventor 曹建伟高兆峰杨遂军
Owner HISENSE
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