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Image regulation method

An image adjustment and pixel technology, which is applied in cathode ray tube indicators, instruments, static indicators, etc., can solve problems such as bright streak smear, abnormal brightness of liquid crystal gray scale, blurred dynamic image quality, etc., to achieve easy implementation, The effect of limited hardware cost increase and smooth dynamic picture quality

Inactive Publication Date: 2009-05-06
CHUNGHWA PICTURE TUBES LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the known method of calculating the OD value often causes abnormal grayscale brightness of the liquid crystal, and also blurs or blurs the image quality of the dynamic image.

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Embodiment Construction

[0038]The inventors of the present application tested several known methods for calculating the overdrive (OD) value of liquid crystals. After analysis, it was found that when the known internal difference method operates when adjacent gray levels are switched, the calculated gray value will have a large difference. Or it does not conform to the actual liquid crystal reaction, so the screen is abnormal. First, in the descriptions of the following embodiments, the grayscale switch point between the initial grayscale value i and the target grayscale value j in the lookup table is represented as P(i, j), where i, j are integers. Please refer to Figure 1, Figure 1 is the analysis of the OD value of the first known internal difference method. The overdrive lookup table (OD table) used in the first known interpolation method presets gray levels such as P(0,0), P(16,0), P(0,16) and P(16,16) The overdrive value (OD value) of the switching point, and the other data are calculated by t...

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Abstract

The invention relates to an image-adjusting method applicable to a liquid crystal display device. The image-adjusting method comprises the following steps: providing a lookup table preset with overdrive values of different gray-scale switching points; receiving an initial gray-scale value and a target gray-scale value of a pixel; determining an overdrive range in the lookup table for the pixel, and the overdrive range comprises a plurality of overdrive values of the lookup table; using a diagonal interpolation method to calculate the overdrive value of the pixel according to the overdrive range, reducing the liquid crystal response time when the pixel is output and obtaining an updated frame, wherein, the diagonal interpolation method calculates the overdrive value of the pixel based on the overdrive values and a diagonal interpolation relational expression related to the overdrive values and using the linear diagonal interpolation method repeatedly.

Description

technical field [0001] The invention relates to an image adjustment method, and in particular to an image adjustment method of a liquid crystal display. Background technique [0002] In recent years, liquid crystal display (Liquid Crystal Display, LCD) devices have developed vigorously, but the liquid crystal response speed of the liquid crystal display device is still relatively slow compared with general cathode-ray tubes (cathode-ray tubes, CRT). Therefore, when the animation is quickly played on the liquid crystal display device, image retention is likely to occur. [0003] In order to improve the slow-changing liquid crystal response, some manufacturers have developed a liquid crystal overdrive (OD) method, which speeds up the liquid crystal response time through voltage adjustment, so that the liquid crystal can reach the ideal brightness within one screen time. Ideally, the known method needs to establish an overdrive lookup table (OD table) with a size of 256*256, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20G09G5/06G02F1/133
Inventor 林享昙赵曰理
Owner CHUNGHWA PICTURE TUBES LTD