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Method for selecting recursive sub field coding

A coding and formula technology, which is applied to the selection field of subfield coding, can solve problems such as large MPD value, and achieve the effect of reducing the amount of calculation and reducing the false contour.

Inactive Publication Date: 2007-10-31
四川世纪双虹显示器件份有限公司
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Problems solved by technology

However, the MPD value between adjacent codes will be very large, especially if the MPD value is large between codes with high gray levels, false contours will still occur.

Method used

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  • Method for selecting recursive sub field coding
  • Method for selecting recursive sub field coding

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0024] For 11 subfields, there are 2 encoding methods 11 = 2048 types, if 256 levels of gray scale can be realized, then there are 2048-256 = 1792 types of redundant coding methods. Therefore, we can select several sets of codes from them, and the selection method is to start from the gray level of 255, and then select the codes downwards in turn. Because there is only one code for grayscale 255, the code with the smallest MPD value can be selected from grayscale 254. If the MPD values ​​calculated by several codes in grayscale 254 and grayscale 255 codes are equal and the smallest (possible in practice), you can select all these codes as several groups, and then use these codes in turn Look down. In each group of selected codes, since the MPD values ​​of adjacent codes are very small, within a certain range, the MPD values ​​between different gray-le...

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Abstract

The present invention discloses one kind of sub-field code selecting method capable of minimizing the MPD value between adjacent display units in mobile image of AC PDP to reduce the pseudo contour of moving image and improve image quality. The main technological scheme is that the dynamic code form data searching method includes selecting two codes with minimum MPD value from two highest grey levels and searching code with smaller MPD value successively from the higher grey level to lower grey level based on the code with low grey level. The searched code is used as the data of dynamic code form for searching.

Description

technical field [0001] The invention relates to a method for improving the image quality of an AC plasma flat panel display, in particular to a method for selecting subfield encoding. Background technique [0002] The AC plasma flat panel display applies voltage to the sustain electrode X / Y and address electrode A, and utilizes discharge on the electrode surface to excite phosphors to emit light to realize image display. Its grayscale display adopts addressable display separation subfield technology (ADS technology), that is, one field is divided into eight subfields, and each subfield is divided into preparation period, addressing period and maintenance period. [0003] Pseudo-contour phenomenon is a kind of visual image distortion due to the integration effect of human eyes and the combination of ADS technology. For the human eye, we cannot change it, but when looking for codes, we can look for codes with the same luminous pattern to reduce or weaken the false contour phe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/288G09G3/20H01J17/49G09F9/313G09G3/29
Inventor 郭应锋王付生刘洋徐曼
Owner 四川世纪双虹显示器件份有限公司
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