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Adaptive LCD TV display quality adjusting apparatus and method

An adaptive adjustment and TV display technology, which is applied to color TV parts, TV system parts, TVs, etc., can solve problems such as glare, backlight adjustment, and audience visual fatigue without considering the screen, and achieve elimination Effects of whitening and glare of images, prevention of visual fatigue, improvement of subjective image quality

Active Publication Date: 2009-04-22
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are the following deficiencies in LCD TVs now: 1. In a normal home environment, especially at night or when the ambient brightness is low, the brightness is too high, and the eyes are prone to fatigue; The level performance is not good, resulting in a weak image layering and unsatisfactory picture quality
2. The power consumption of the LCD display is basically constant, and the power consumption of the backlight is not adjusted according to different situations. Generally, it is set to the maximum power, which not only does not conform to the concept of energy saving, but also, if the backlight is too bright, it will cause display quality problems
Although these two methods solve the above two problems 1 and 2, they do not take into account the glare of the screen when a large area of ​​the screen is bright and the impact on the visual fatigue of the audience

Method used

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  • Adaptive LCD TV display quality adjusting apparatus and method
  • Adaptive LCD TV display quality adjusting apparatus and method
  • Adaptive LCD TV display quality adjusting apparatus and method

Examples

Experimental program
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Embodiment 1

[0034] This embodiment includes an LCD display module, an extraction module, an image enhancement module, and a CPU. The extraction module can extract information from image content features of the image signal. The extracted information includes the histogram and average value of the image content, and then the relevant parameters are sent to the CPU with the analysis and processing program preset; then, the control amount of the backlight brightness is output according to the optimization algorithm, and different LCD display modules adopt Different control quantities can be voltage or PWM pulse.

[0035] The algorithm is as follows: see flowchart, Figure 4 . Firstly, for each input image, the histogram information, average value, maximum and minimum value, and deviation value of each frame image are extracted through the image feature extraction module. Estimate the ratio Pbr of the bright area in the image. The acquisition of Pbr refers to the ratio of the total number ...

Embodiment 2

[0037] Using the method combined with the method of measuring the dark area of ​​the previous invention, first detect the proportion of the dark area, see image 3 , that is, to extract the histogram information, average value, maximum and minimum values, and deviation values ​​of each frame of image. Then estimate the dark area ratio Pdk in the current state. And compare Pdk with the preset dark area ratio Cdk, if Pdk is less than Cdk, do not perform backlight adjustment, and perform usual image quality enhancement processing; if Pdk is greater than Cdk, calculate and set the backlight reduction parameter ΔR, calculate and Set the delay parameter Td, and then perform adaptive backlight adjustment control according to ΔR and Td, and perform brightness compensation and white level extension to compensate for the image quality degradation caused by the brightness decrease of the backlight. Otherwise, the proportion of detected bright areas, see Figure 4 , if the ratio Pbr of ...

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Abstract

The invention relates to an adaptive adjuster of LCD TV display quality and relative method, wherein said adjuster comprises LCD display module, one signal collector for collecting the brightness parameter of image, an image strengthen processing module, one CPU for analyzing the brightness information; the image strengthen processing module is connected to the CPU; the signal collector is connected to CPU; CPU controls the backlight source brightness adjusting port connected to the LCD display module. The invention checks the brightness area ratio of image to automatically decide to reduce the backlight brightness or not; the image strengthen processing module corrects the brightness and extends the black potential of dark area, to limit over brightness, etc. The invention can improve quality and save energy.

Description

technical field [0001] The invention relates to the technical field of television display, and more specifically relates to an LCD television display quality adjustment technology. Background technique [0002] Now LCD TVs are being favored by consumers and are widely entering the homes of ordinary consumers. However, since the LCD is a passive display device, the liquid crystal is used as a controllable light valve to display images. At the same time, due to the limitation of the characteristics of the liquid crystal, the light valve cannot reach the ideal closed state, that is, it gives a completely black signal, and the LCD screen will also be black. There is weak bright light emitted, and the phenomenon of poor black level performance is particularly obvious when the ambient brightness is low. For a specific LCD display module, only by reducing the brightness of the backlight can the black level performance be improved. Therefore, there are the following deficiencies i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/57G09G3/36
Inventor 李海鹰沈思宽卢铁军王鵾江润郭明海刘志明陈狄君
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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