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Compensation circuit and display device for common electrode voltage

A common electrode and compensation circuit technology is applied in the field of compensation circuits for common electrode voltage and display devices, which can solve the problems of inability to compensate for common electrode voltage and poor display effect of display devices, and achieve the effect of ensuring display effects.

Active Publication Date: 2018-07-17
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the feedback signal of the feedback signal terminal feedVcom is simply fed back to the positive-phase input terminal “-” of the amplifier A, it takes a certain amount of time to input the input signal with a fixed input signal terminal into the inverting input terminal “+” of the amplifier A. Adjust the compensation signal output by the amplifier A to a signal suitable for compensating the common electrode voltage
Therefore, in the scenario where common electrode voltage compensation is required when the coupling phenomenon of the common electrode is serious or the coupling phenomenon changes from light to heavy, the common electrode voltage compensation circuit in the prior art cannot properly adjust the common electrode voltage in a timely manner. Compensation, resulting in poor display effect of the display device

Method used

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  • Compensation circuit and display device for common electrode voltage
  • Compensation circuit and display device for common electrode voltage

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Effect test

Embodiment 1

[0022] see figure 2 The common electrode voltage compensation circuit provided by the embodiment of the present invention includes a control module P1, a selection module P2, a transmission module P3, and an output module P4; wherein, the control module P1 is connected to the feedback signal terminal feedVcom, the first reference voltage terminal U1, the second The two reference voltage terminals U2, the selection module P2, and the transmission module P3 are connected to generate a control signal according to the feedback signal of the feedback signal terminal feedVcom, the signal of the first reference voltage terminal U1 and the signal of the second reference voltage terminal U2, and control The signal is transmitted to the selection module P2. It should be noted that the feedback signal terminal feedVcom is connected to the compensated common electrode, that is, the feedback signal of the feedback signal terminal feedVcom is provided by the compensated common electrode; th...

Embodiment 2

[0030] see Figure 5 , the following will introduce the specific structure and connection relationship of the control module P1, the selection module P2, the transmission module P3 and the output module P4 in the compensation circuit of the common electrode voltage in the above embodiment:

[0031] The control module P1 includes a first comparator OP1, a second comparator OP2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6; wherein, the first The inverting input terminal "-" of the comparator OP1 is respectively connected to the first terminal of the first capacitor C1, the first terminal of the first resistor R1 and the first terminal of the fifth resistor R5, and its non-inverting input terminal "+" is respectively connected to The first end of the second resistor R2, the first end of the third resistor R3, and the first end of the fourth resistor R4, the output ends of which are respectively ...

Embodiment 3

[0042] An embodiment of the present invention provides a display device, which includes the compensation circuit for the common electrode voltage in the above embodiments. Specifically, the display device may be any product or component with a display function, such as electronic paper, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, and navigator. The compensation circuit for the common electrode voltage in the display device has the same advantages as the compensation circuit for the common electrode voltage in the above-mentioned embodiments, which will not be repeated here.

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Abstract

The present invention discloses a compensation circuit and display device for public electrode voltage, which involves the field of display technology. In order to solve the problem that the public electrode voltage is not able to make appropriate compensation in a timely manner, leading to the poor display effect of the display device.In the compensation circuit of the public electrode voltage, the control module is used to generate the control signal to the selection module according to the signal of the feedback signal, the signal of the first base voltage end, and the signal of the second reference voltage end;Signals and signals on the voltage end, select the signal of the first public electrode voltage end, the signal of the second public electrode voltage end, or the signal of the third public electrode voltage end as the input signal transmission to the output module; the transmission module is used to receive the control module from the control moduleThe feedback signal is transmitted to the output module; the output module is used to generate compensation signals based on feedback signals and input signals.The compensation circuit of the public electrode voltage provided by the present invention is applied to the display device.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a common electrode voltage compensation circuit and a display device. Background technique [0002] At present, with the development of display technology, the size of the display device is required to be larger and higher, and the resolution of the display device is also required to be higher and higher, which makes the load of the display device larger and larger, resulting in data lines, common electrodes, etc. The coupling capacitance will also increase. With the high-low level change of the data signal on the data line, the coupling phenomenon will occur on the common electrode, and the coupling degree of the common electrode will also change. The coupling degree of the common electrode is serious or the coupling degree changes from light When the transition is heavy, crosstalk and greening will occur in the display device, which will affect the display effect of the displa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20
CPCG09G3/20G09G3/3655G09G2320/0209G09G2330/028G09G5/003G09G2300/0814G09G2300/0823G09G2300/0833G09G2320/0219G09G2330/021
Inventor 张剑
Owner BOE TECH GRP CO LTD