Method for processing space expansion FRC

A space expansion and processing method technology, applied in the field of liquid crystal display controllers, can solve the problems of reducing the number of on and off pixel differences, visual jitter, slight jitter, etc., achieve good color display performance, and ensure the effect of average brightness

Inactive Publication Date: 2009-04-08
ZHEJIANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

The typical FRC method uses nonlinear temporal color mixing to improve the nonlinearity of the color component level display of the liquid crystal display. However, during temporal color mixing, since the average brightness of the color block will change with the FRC frequency of the pixel, it will cause visual distortion. slight jitter
A better grouping FRC method, grouping pixels of the same level of color by position, such as: grouping by modulo 4 distance, different groups are processed in different time series similar to the typical FRC method, due to the average within the color block The fluctuation of brightness is inconsistent, and the number of maximum bright and dark pixel differences in every two frames of image refresh is reduced, reducing visual jitter; at the same time, it still maintains the nonlinear support for the color component level of liquid crystal display; however, press The FRC method of position grouping may be particularly sensitive to some specific pictures, and may still cause slight visual jitters

Method used

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  • Method for processing space expansion FRC
  • Method for processing space expansion FRC
  • Method for processing space expansion FRC

Examples

Experimental program
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Effect test

Embodiment 1

[0037] In the sixteen-level grayscale spatial FRC method, if a pixel of the fifth frame is passed in, and its color component level is 6, then refer to image 3 It can be obtained that the duty ratio of the time mixing color is 3 / 7, and the time mixing subsequence is 1100100, which is the 17th pixel of this color component level in the whole image. refer to Figure 5 , then the color component is six counter gray5_counter=17, the total counter value=frame number+the value of this grayscale counter overall_counter=gray6_counter+frame_counter=17+5=22. This pixel display shows the value of the (total counter value% the length of the time-mixing sequence: 22%7=1) data in the time-mixing sequence 1100100, which is 1, which is a bright spot.

Embodiment 2

[0039] In the sixteen-level grayscale spatial FRC method, if a pixel of the 192nd frame is passed in, and its color component level is 4, then refer to image 3 It can be obtained that the time-mixing duty ratio is 1 / 3, and the time-mixing sub-sequence is 100, which is the 563th pixel of this color component level in the entire image. refer to Figure 5 , then the color component is six counter gray5_counter=563, the total counter value=frame number+the value of this gray scale counter overall_counter=gray6_counter+frame_counter=192+563. This pixel display shows the value of the (total counter value% length of the time-mixing sequence: 755%3=2) data in the time-mixing sequence 100, which is 0, which is a dark point.

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Abstract

This invention discloses a method for processing special expanded FRC including: a step of realizing non-linear time mixed color by limitlessly repeating different time mixed color sub-sequences, a step of space-expanding pixels in a same color component stage having the following technical results: 1, fine color display performance, the maximum difference of the open pixels of two adjacent frames is smaller than the typical FRC and the group FRC and the mean brightness of the picture keeps the same, 2, the expanded area of FRC does not influence the entire LCD controller.

Description

technical field [0001] The invention relates to a space expansion FRC processing method, which expands nonlinear time color mixing to the display screen space, and the method is mainly applicable to liquid crystal display controllers on mobile phones and sales terminals. Background technique [0002] The FRC (Frame Rate Control) frame rate control method is mainly used in the STN (Super Twisted Nematic) super twisted nematic liquid crystal display control. Because STN has advantages in cost and power consumption, it is widely used in mobile phones, sales terminals, etc., but each pixel displayed by STN has only two states of "on" or "off". In order to display different color component levels, it is necessary This is achieved by temporal color mixing. The typical FRC method uses nonlinear temporal color mixing to improve the nonlinearity of the color component level display of the liquid crystal display. However, during temporal color mixing, since the average brightness of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20G09G5/02G02F1/133
Inventor 葛海通王杰周知名蔡志翔顾良陈超王艳芳赵涵沈海斌张倩王国雄
Owner ZHEJIANG UNIV
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