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Gamma standard voltage and gamma driving voltage generation circuit and display device

A technology for generating circuits and standard voltages, used in static indicators, instruments, etc., to solve problems such as abnormal display

Active Publication Date: 2021-06-11
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention at least partly solves the problem that the existing gamma standard voltage may be compensated upwards or downwards without limitation, which may cause abnormal display, and provides a gamma Standard voltage generating circuit, gamma driving voltage generating circuit, display device

Method used

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  • Gamma standard voltage and gamma driving voltage generation circuit and display device
  • Gamma standard voltage and gamma driving voltage generation circuit and display device

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Embodiment Construction

[0060] In order for those skilled in the art to better understand the technical solutions of the embodiments of the present invention, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation manners.

[0061] It should be understood that the specific embodiments and accompanying drawings described herein are only used to explain the embodiments of the present invention, but not to limit the present invention.

[0062]It will be understood that the various embodiments of the present invention and various features of the embodiments may be combined with each other without conflict.

[0063] It can be understood that, for the convenience of description, the drawings of the embodiments of the present invention only show parts related to the embodiments of the present invention, and parts unrelated to the embodiments of the present invention are not shown in the drawings.

[0064] Glo...

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Abstract

The embodiment of the invention provides a gamma standard voltage generation circuit, a gamma driving voltage generation circuit and a display device, belongs to the technical field of display, and can at least partially solve the problem of display abnormity caused by possible unlimited upward or downward compensation of the existing gamma standard voltage. The gamma standard voltage generation circuit provided by the embodiment of the invention comprises a constant voltage unit used for outputting constant voltage; the following voltage unit is connected with the driving voltage end and used for outputting following voltage changing along with the driving voltage of the driving voltage end; the selection unit is connected with the output end of the constant voltage unit and the output end of the following voltage unit and is used for outputting the following voltage or the constant voltage as output voltage; the comparison unit is connected with the output end of the selection unit and used for controlling the selection unit to output following voltage when the output voltage meets a preset standard and controlling the selection unit to output constant voltage when the output voltage does not meet the preset standard; the constant voltage does not meet a preset standard.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a gamma standard voltage generating circuit, a gamma driving voltage generating circuit and a display device. Background technique [0002] In a display device (such as an organic light-emitting diode display device), the gamma driving voltage at each gray scale can be generated by dividing the gamma standard voltage, that is, for driving each pixel unit (sub-pixel) in the corresponding The data voltage Vdata displayed in grayscale. [0003] When the driving voltage of the display device (such as the positive driving voltage and the negative driving voltage of the organic light emitting diode display device) is different, if the gamma driving voltage remains unchanged, the display effect (such as color cast and brightness difference, etc.) will be affected. In the display device, the driving voltage may vary due to leakage current (especially in low-brightness image...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208G09G3/3258G09G3/3291
CPCG09G3/3208G09G3/3258G09G3/3291G09G2310/0243G09G2330/028G09G2320/0233G09G2320/0276G09G2330/04G09G3/2074G09G2310/0297G09G3/3696
Inventor 吴宝云郭泽邦赵辉
Owner BOE TECH GRP CO LTD
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