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Voltage regulation circuit and method and display device

A voltage adjustment circuit and voltage compensation technology, applied in static indicators, instruments, etc., can solve the problems of abnormal picture and difficult inversion of liquid crystal molecules, and achieve the effect of simplifying the circuit structure

Pending Publication Date: 2022-03-15
MIANYANG HKC OPTOELECTRONICS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a voltage adjustment circuit, a voltage adjustment method and a display device, at least to a certain extent, to overcome the technical problems in the related art that the VGH voltage is constant and the liquid crystal molecules are difficult to reverse and the screen is abnormal.

Method used

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  • Voltage regulation circuit and method and display device
  • Voltage regulation circuit and method and display device
  • Voltage regulation circuit and method and display device

Examples

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Effect test

Embodiment 1

[0046] According to the first aspect of the embodiments of the present application, Embodiment 1 of the present application provides a voltage adjustment circuit 100, such as figure 1 as shown, figure 1 A circuit diagram of the voltage adjustment circuit 100 described in Embodiment 1 of the present application is schematically shown.

[0047] The voltage regulation circuit 100 of the present application includes a charge pump unit 110 , a voltage compensation unit 120 and a power integration unit 130 .

[0048] Wherein, the output terminal 131 of the power integration unit is connected to the input terminal 111 of the charge pump unit, and the power integration unit 130 is used to generate an initial reference voltage. The power integration unit 130 is also called a power integrated circuit (Power IC), which refers to the pulse width control integration of the switching power supply. The power supply uses the power integration unit 130 to adjust the stability of the output vo...

Embodiment 2

[0090] The above part introduces the content of the first embodiment of the present application, and then continues to introduce the content of the second embodiment of the present application. According to the second aspect of the embodiment of the present application, the present application also provides a voltage adjustment method, such as Figure 9 as shown, Figure 9 A flow chart of the voltage adjustment method described in Embodiment 2 of the present application is schematically shown. The method includes step S910-step S950.

[0091] Step S910: Using the power integrated unit to generate an initial reference voltage.

[0092] The power integration unit 130 of the present application may integrate a pulse width modulation controller, and use the pulse width modulation controller to generate an initial reference voltage, where the initial reference voltage may be a PWM square wave voltage.

[0093] Step S920: using the charge pump unit to generate an initial gate volt...

Embodiment 3

[0102] Such as Figure 10 as shown, Figure 10 A schematic diagram of the display device described in Embodiment 3 of the present application is schematically shown. This embodiment also provides a display device 1000, including a display panel 1010, a gate drive circuit 1020, and a voltage adjustment circuit 100, wherein the voltage adjustment circuit 100 is connected to the gate drive circuit 1020, and the charge pump unit of the voltage adjustment circuit 100 can The output terminal of is connected to the gate driving circuit 1020 . The gate drive circuit 1020 is connected to the display panel 1010 or the gate drive circuit 1020 is integrated on the display panel 1010 ( Figure 10 The middle gate driving circuit 1020 is set independently from the display panel 1010).

[0103] The display device of the present application can adjust the voltage of the thin film transistor to generate different gate voltages to control the inversion of the liquid crystal molecules, avoidin...

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Abstract

The invention belongs to the technical field of display devices, and particularly relates to a voltage adjusting circuit, a voltage adjusting method and a display device. The voltage regulation circuit comprises a charge pump unit, a voltage compensation unit and a power supply integration unit, an initial reference voltage is generated through the power supply integration unit, then an initial grid voltage is generated by using the initial reference voltage according to the charge pump unit, and the initial grid voltage is used as an input voltage of the voltage compensation unit. The voltage compensation unit generates compensation voltage through the initial grid voltage; then the power supply integration unit generates a target reference voltage according to the compensation voltage, and finally, the charge pump unit generates a target gate voltage according to the target reference voltage and transmits the target gate voltage to the thin film transistor; through mutual cooperation of the charge pump unit, the voltage compensation unit and the power supply integration unit, different grid voltages can be generated to control inversion of liquid crystal molecules, and the situation that image abnormity occurs and use of a user is affected is avoided.

Description

technical field [0001] The present application belongs to the technical field of display devices, and in particular relates to a voltage adjustment circuit, a voltage adjustment method and a display device. Background technique [0002] Thin film transistor liquid crystal screen means that each liquid crystal pixel on the liquid crystal display is driven by a thin film transistor integrated behind it. When driving a thin film transistor LCD screen, in each field period, the thin film transistor must be turned on once to charge and discharge the capacitor once, and the voltage when the thin film transistor is turned on is the VGH voltage, and the voltage when the thin film transistor is turned off is the VGL voltage. [0003] However, in the existing voltage adjustment circuit, the output of the VGH voltage is a constant value, and the characteristics of the liquid crystal molecules are different under different environmental conditions. If it is turned on, the screen will b...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3696G09G3/3677
Inventor 李冠群樊涛王赟袁海江
Owner MIANYANG HKC OPTOELECTRONICS TECH CO LTD
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