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Adaptive LCD TV display quality adjusting apparatus and method

An adaptive adjustment, TV display technology, applied in color TV parts, TV system parts, TV and other directions, can solve the problems of the audience's visual fatigue, backlight adjustment, not considering the bright and dazzling picture, etc., to achieve subjective The effect of improving image quality, preventing visual fatigue, eliminating image whitening and glare problems

Active Publication Date: 2007-05-23
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Abstract
  • Description
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  • 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

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Effect test

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 the image content feature 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 preset analysis and processing program; then, the control amount of the backlight brightness is output according to the optimization algorithm. Different LCD display modules use Different control quantities, which can be voltage or PWM pulses.

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

Embodiment 2

[0037] Using the method combined with the method of measuring the dark area of ​​the previous invention, firstly detect the proportion of the dark area, see Figure 3, that is, 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. Compare Pdk with the preset dark area ratio Cdk. If Pdk is less than Cdk, no backlight adjustment is performed, and normal image quality enhancement processing is performed; 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 degradation of image quality caused by the decrease in backlight brightness. Otherwise, the ratio of the bright area is detected, referring to FIG. 4 , if the ratio Pb...

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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 particularly to the adjustment technology of LCD television display quality. 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, to give a completely black signal, the LCD screen will also There is a faint bright light, and the phenomenon of poor black level performance is particularly obvious when the ambient brightness is low. For certain LCD display modules, black level performance can only be improved by reducing the backlight brightness. Therefore, the current LCD TV has the following shortcomings: 1. In the normal home us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/57
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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