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Gate voltage control circuit, gate drive circuit and display device

A gate drive circuit and control circuit technology, applied in the field of gate voltage control circuit, gate drive circuit, and display device, can solve the problem of long wiring between a drive IC and a gate line signal, uneven display brightness of a display panel, and display Problems such as poor effect

Active Publication Date: 2019-07-12
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the signal trace connecting the driver IC and the gate line in the display substrate will be longer, resulting in more obvious delay and attenuation of the turn-on voltage
In the prior art, the delay problem can be overcome by pre-charging, but the attenuation of the voltage still cannot be solved, resulting in the fact that under the same charging time, the charging effect of pixels close to the row number of the driver IC is better than that of the row farther away from the driver IC. The charging effect of several pixels is good, but the overall display brightness of the display panel is not uniform, and the display effect is poor.

Method used

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  • Gate voltage control circuit, gate drive circuit and display device
  • Gate voltage control circuit, gate drive circuit and display device
  • Gate voltage control circuit, gate drive circuit and display device

Examples

Experimental program
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Embodiment 1

[0026] Such as figure 1 with 2 As shown, this embodiment provides a gate voltage control circuit, including: a voltage supply module, used to provide different voltages to the A node; The amplitude of the provided gate operating voltage is provided, and the adjusted gate operating voltage is output to the gate driver.

[0027] Wherein, the gate driver can be connected to multiple gate lines, and based on the adjusted gate operating voltage, it inputs an operating level for driving pixel units connected to the gate lines to each gate line within a duty cycle of each gate line.

[0028] The gate voltage control circuit of this embodiment can adjust the gate operating voltage provided by the power supply unit through the different voltages provided by the voltage supply module to the A node, so as to output gate operating voltages of different amplitudes to the gate driver, Furthermore, the amplitude of the gate driving voltage input by the gate driver to each gate line can be ...

Embodiment 2

[0045] Such as figure 1 with 2 As shown, this embodiment provides a gate driving circuit, including any gate voltage control circuit provided in Embodiment 1.

[0046] Preferably, the gate drive circuit in this embodiment further includes a power supply unit, configured to provide the gate operating voltage to the voltage adjustment unit. Specifically, the power supply unit may include a power supply terminal AVDD and a Change Bump step-up circuit, AVDD provides a base voltage, and outputs a gate drive voltage to the voltage regulation unit after boosted by the Change Bump step-up circuit. Wherein, the gate driving voltage output by the power supply unit should be greater than the standard gate driving voltage, so that the subsequent regulated power supply can output the corresponding adjusted gate driving voltage after stepping down the voltage.

[0047] Preferably, the gate drive circuit in this embodiment further includes: a gate driver, configured to convert the gate ope...

Embodiment 3

[0049] This embodiment provides a display device, which includes any gate driving circuit provided in Embodiment 2.

[0050] Since the display device in this embodiment includes the gate drive circuit provided in Embodiment 2, the charging capability of the pixel units far away from the signal input terminal in the display device is significantly improved, and the charging effect is better, so the screen display of the display device Good consistency.

[0051] Wherein, the display device may be an electroluminescent display device, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and any product or component with a display function.

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PUM

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Abstract

The invention provides a grid voltage control circuit, a gate drive circuit and a display device, and belongs to the technical field of display. The gate voltage control circuit comprises a voltage supply module used for providing different voltages for an A node; a the voltage regulating unit used for regulating the amplitude of the grid working voltage provided by the power supply unit under thecontrol of the voltage of the node A and outputting the regulated grid working voltage to the grid driver.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a gate voltage control circuit, a gate drive circuit and a display device. Background technique [0002] In an existing display device, a driving IC is usually used to write a turn-on voltage Vgh to each row of gate lines on the display substrate, so as to control the switching state of the thin film transistors in each row of pixels. Wherein, the driving IC is electrically connected to the gate line through the signal line. [0003] With the maturity of the display technology, the display device shows a trend of developing to a larger size. In this way, the signal wiring connecting the driving IC and the gate line in the display substrate will be longer, resulting in more obvious delay and attenuation of the turn-on voltage. In the prior art, the delay problem can be overcome by pre-charging, but the attenuation of the voltage still cannot be solved, resulting in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20
CPCG09G3/20G09G2310/0267
Inventor 刘娜妮赖意强陈明许炜泽韩久剑翁彬李强龙黄宇鹏翁祖伟刘荣赵
Owner BOE TECH GRP CO LTD