Common voltage compensation circuit, compensation method thereof, array substrate and display device

A common voltage and compensation circuit technology, applied to static indicators, instruments, etc., can solve problems such as abnormal gray scale display, crosstalk, and screen jitter

Active Publication Date: 2016-05-04
CHONGQING BOE OPTOELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In existing liquid crystal displays and organic electroluminescent displays, the common voltage applied to the common electrode line by the common voltage generation circuit is easily affected by other voltages and appears to rise or fall, which will lead to liquid crystal displays and organic electroluminescent displays. The picture displayed by the light-emitting display has problems such as jitter, afterimage, abnormal display grayscale, and crosstalk, which affect the display quality of liquid crystal displays and organic electroluminescent displays.

Method used

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  • Common voltage compensation circuit, compensation method thereof, array substrate and display device
  • Common voltage compensation circuit, compensation method thereof, array substrate and display device
  • Common voltage compensation circuit, compensation method thereof, array substrate and display device

Examples

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Effect test

example 1

[0077] Example 1: If image 3 As shown, the control power supply P controls the sampler S to turn on, and the sampler S samples the comparison result of the common voltage and the reference voltage obtained by the comparator A:

[0078] When the difference between the common voltage and the reference voltage is greater than or equal to the preset threshold, the comparator A inputs a high-level signal to the gate of the first switching transistor T1 through the sampler S, so that the first switching transistor T1 is in a conducting state, so that the input terminal b of the first inverter B1 11 and the port E1 for inputting the first level signal is grounded; the gate of the first inverter B1 to the gate of the second switching transistor T2 and the input terminal b of the second inverter B2 21 output the second level signal, the second inverter B2 converts the second level signal into a zero-voltage signal and sends it to the gate of the third switching transistor T3, the sec...

example 2

[0080] Example 2: If Figure 4 As shown, the control power supply P controls the sampler S to turn on, and the sampler S samples the comparison result of the common voltage and the reference voltage obtained by the comparator A:

[0081] When the difference between the common voltage and the reference voltage is greater than or equal to the preset threshold, the comparator A inputs a high-level signal to the gate of the first switching transistor T1 through the sampler S, so that the first switching transistor T1 is in a conducting state, so that the input terminal b of the first inverter B1 11 and the port E1 for inputting the first level signal is grounded; the gate of the first inverter B1 to the gate of the second switching transistor T2 and the input terminal b of the second inverter B2 21 output the second level signal, the second inverter B2 converts the second level signal into a zero-voltage signal and sends it to the gate of the third switching transistor T3, the se...

example 3

[0083] Example 3: If Figure 5 As shown, the control power supply P controls the sampler S to turn on, and the sampler S samples the comparison result of the common voltage and the reference voltage obtained by the comparator A:

[0084] When the difference between the common voltage and the reference voltage is greater than or equal to the preset threshold, the comparator A inputs a high-level signal to the gate of the first switching transistor T1 through the sampler S, so that the first switching transistor T1 is in a conducting state, so that the input terminal b of the first inverter B1 11 and the port E1 for inputting the first level signal is grounded; the gate of the first inverter B1 to the gate of the second switching transistor T2 and the input terminal b of the second inverter B2 21 output the second level signal, the second inverter B2 converts the second level signal into a zero-voltage signal and sends it to the gate of the third switching transistor T3, the se...

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Abstract

The invention discloses a common voltage compensation circuit, its compensation method, an array substrate and a display device. When the difference between the common voltage on the common electrode line and the reference voltage is large, the comparison module outputs a zero-voltage signal to the reverse module, and the reverse The module outputs the second level signal to the voltage adjustment module, the voltage adjustment module outputs the reference voltage to the common electrode line, and the common voltage compensation circuit compensates the common voltage on the common electrode line so that the common voltage on the common electrode line is equal to the reference voltage; When the difference between the common voltage on the common electrode line and the reference voltage is small, the comparison module outputs a first-level signal to the reverse module, the reverse module outputs a zero-voltage signal to the voltage adjustment module, and the voltage adjustment module outputs a zero-voltage signal to the common electrode line The common voltage compensation circuit does not compensate the common voltage on the common electrode line; it can achieve the purpose of stabilizing the common voltage on the common electrode line, thereby avoiding the problem of abnormal display images on the display panel.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a common voltage compensation circuit, a compensation method thereof, an array substrate and a display device. Background technique [0002] Among the existing display devices, organic electroluminescence display (OLED, Organic Light Emitting Diode) has the advantages of simple preparation process, low cost, high luminous efficiency and easy formation of flexible structure; liquid crystal display (LCD, Liquid Crystal Display) has low power consumption, display It has the advantages of high quality, no electromagnetic radiation and wide application range. Organic electroluminescent displays and liquid crystal displays are relatively important display devices at present. [0003] Apply voltage to the pixel electrode and common electrode in the liquid crystal display, the electric field formed between the pixel electrode and the common electrode controls the rotation of li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3208G09G3/36
CPCG09G3/3208G09G3/3655G09G2330/12G09G3/3614G09G2330/028G09G3/3225
Inventor 许益祯
Owner CHONGQING BOE OPTOELECTRONICS
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