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Data driving circuit and its driving method, data driving system and display device

A data-driven circuit and circuit technology, used in static indicators, cathode ray tube indicators, instruments, etc., can solve the problems of grayscale loss, inability to display grayscale, and screen quality degradation, and achieve the effect of avoiding grayscale loss.

Active Publication Date: 2018-04-20
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method will cause the loss of grayscale, and the color with a small voltage range cannot display all grayscales, which brings the problem of screen quality degradation

Method used

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  • Data driving circuit and its driving method, data driving system and display device
  • Data driving circuit and its driving method, data driving system and display device
  • Data driving circuit and its driving method, data driving system and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The data driving circuit provided by Embodiment 1 of the present invention can be used to drive such as figure 2 The pixel array shown, as image 3As shown, the data driving circuit can be divided into a plurality of sub-circuits (three of which are represented as C10, C20, and C30), and each sub-circuit includes three data line interface units 11, 12 and 13, and three digital-to-analog conversion units 21 , 22 and 23, also includes 9 switch units 31, 32, 33... 39. In each sub-circuit, each data line interface unit is respectively connected to three digital-to-analog conversion units in the sub-circuit through three switch units in the sub-circuit, and each data line interface unit is also connected through the three switch units in the sub-circuit. The three switch units are respectively connected to the three digital-to-analog conversion units in the sub-circuit.

[0039] for image 3 In the data driving circuit shown, when driving, the control process of each gro...

Embodiment 2

[0047] The data driving circuit provided by Embodiment 2 of the present invention can be used to drive such as Figure 4 In the pixel array, each pixel array includes a plurality of sub-pixel arrays AU, and each sub-pixel array includes 3 columns of sub-pixels and three data lines. The sub-pixel array AU including R4, R5, and R6 sub-pixels and D4, D5, and D6 data lines is used for illustration, wherein the 4x+1 (x is an integer greater than or equal to 0) row sub-pixels of the first column sub-pixel R4 and Sub-pixels in the 4x+3 row, sub-pixels in the 4x+2 row of the sub-pixel R5 in the second column, sub-pixels in the 4x+4 row of the sub-pixel R6 in the third column are blue sub-pixels B; sub-pixels in the 4x+2 row of the sub-pixel R4 in the first column The 4th row of sub-pixels, the 4x+1 row sub-pixel and the 4x+3 row sub-pixel of the 2nd column sub-pixel R5, the 4x+2 row sub-pixel of the 3rd column sub-pixel R6 are red sub-pixels R; other sub-pixels are Green sub-pixel G;...

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PUM

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Abstract

The invention provides a data driving circuit and its driving method, a data driving system and a display device. In the data drive circuit provided by the present invention, by controlling the on-off of the switch unit, a data line interface unit can be connected to different digital-to-analog conversion units when driving sub-pixels of different colors, and each digital-to-analog conversion unit is only used to drive A sub-pixel of one color, such a digital-to-analog conversion unit only needs to be connected to a physical Gamma circuit of the corresponding color, without using a digital Gamma circuit, thus fundamentally avoiding the gray scale loss caused by the adjustment using a digital Gamma circuit .

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a data driving circuit and its driving method, a data driving system and a display device. Background technique [0002] In the traditional pixel arrangement, any output channel of the data driving circuit corresponds to a fixed color, such as figure 1 As shown, the sub-pixels connected by each data line Dm (the sub-pixels in the Rm column, m is a positive integer) have the same color (the same R, the same B, or the same G). Therefore, these output channels responsible for the same color are fixedly connected to the digital to analog converter (DAC) of the color, and then connected to the Gamma circuit corresponding to the color, so that there will be no confusion between different colors. In an SPR type display, a data line generally connects sub-pixels of different colors, such as figure 2 Shown is a possible arrangement of SPR sub-pixels. The Rm column of sub-pixe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20
CPCG09G3/2003G09G3/2074G09G2320/0666G09G2320/0673G09G2310/027G09G2310/0297G09G5/003G09G5/04G09G2300/0426G09G2300/0452G09G2310/0291G09G2310/08
Inventor 解红军
Owner BOE TECH GRP CO LTD
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