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Method for eradicating liquid crystal display dynamic trailing smear

A liquid crystal display, dynamic technology, applied in static indicators, instruments, etc., can solve the problems of black insertion technology to reduce contrast, reduce contrast loss, and reduce energy efficiency, etc., to help eliminate dynamic blur and reduce contrast loss. , the algorithm achieves the effect of simplification

Active Publication Date: 2008-01-16
NANJING CEC PANDA LCD TECH
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Problems solved by technology

[0007] However, the black insertion technology itself also has two shortcomings: (1) The black insertion technology reduces the contrast. It can be seen from Figure 3 [picture source, Samsung Electronics, SID 04 Digest] that when the black screen insertion ratio is 50%, the contrast is reduced by more than half ;(2) The energy efficiency becomes lower, and the black screen insertion ratio is 50%, and the energy utilization efficiency is reduced by half, which means that to maintain the same brightness, the brightness of the backlight source must be doubled
Aiming at the second deficiency of the black insertion technology, people propose the gray insertion technology, but although the gray insertion technology overcomes the disadvantage of low energy utilization efficiency of the black insertion technology, it also brings more problems at the same time. The motion blur elimination is not as good as the black insertion technology. , the loss of contrast reduction is greater than that of black insertion technology

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  • Method for eradicating liquid crystal display dynamic trailing smear
  • Method for eradicating liquid crystal display dynamic trailing smear
  • Method for eradicating liquid crystal display dynamic trailing smear

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] This embodiment concretely realizes the dynamic black insertion technical process proposed by the present invention by adopting the mode of FPGA image processing module. The specific process of the method:

[0029]In the dynamic control system of liquid crystal display, in order to input the video image signal into the FPGA (Field Programmable Gate Array) image processing module with frame memory, the two frames of images before and after are stored in the frame memory respectively, and the image integrated in the FPGA module The algorithm calculates the stored images, and converts the two frames of images (Fn-1, Fn) into black and white brightness signal images (In-1, In); compares the brightness of the two frames, that is, the black and white brightness signals of the two frames before and after Each pair of pixels in the correspondin...

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Abstract

The invention discloses a method for eliminating dynamic streaking of liquid crystal display. The concrete steps include: (a). convert images of two following frames into black and white brightness signal images; (b). compare the pixels at the corresponding position in the black and white brightness signal images and retain the pixel with a smaller grayness value; (c). form a frame of black frame insertion images (Gn) with the group of pixels obtained after the comparison of each pair of pixels; (d). insert the black frame insertion images (Gn) into images of two following frames. The method of the invention is to compare continuous image signals of two frames, and form a frame of 'new grayness distribution signal' with the darker pixels of each pixel position as the black frame insertion image to reach the purpose of lowering MPRT and eliminating streaking of dynamic images. The invention can not only overcome the shortcoming of the low efficiency of the black frame insertion technique, but also overcome the inadequate elimination of dynamic blurs and the high decline of the contrast in gray frame insertion technique. In addition, the method of obtaining insertion frames is simple and accessible, thus greatly saving the production cost.

Description

technical field [0001] The invention relates to a liquid crystal display method, in particular to a method for improving the dynamic image quality of the liquid crystal display. Background technique [0002] With the advent of the era of Full Definition (Full Definition) high-definition television, the industrial status of LCD TV (Liquid Crystal Television) has risen greatly. This is because CRT (Cathode Ray Tube, cold cathode ray tube) scans with an electron gun, and it is not easy to achieve the high precision required by FDTV, while LCD uses semiconductor manufacturing process, which can achieve extremely high precision. However, LCD TV also has many defects that need to be improved, and dynamic picture smear (blur) is one of the main defects that LCD TV needs to improve. [0003] The smear defect of LCD TV is mainly caused by two reasons (1) the response speed of liquid crystal is not fast enough; (2) the "hold type" working mode of LCD. Regarding the "hold type" worki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20G02F1/133
Inventor 张克然严华锋
Owner NANJING CEC PANDA LCD TECH
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