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Public voltage regulation circuit, public voltage regulation method, and liquid crystal display panel

A liquid crystal display panel and public voltage technology, which is applied to static indicators, instruments, etc., can solve the problems of large flickering degree and large phase difference of liquid crystal display devices

Active Publication Date: 2019-05-03
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a public voltage regulating circuit and its public voltage regulating method, and a liquid crystal display panel to solve the problem of "the public voltage value output by the discharge voltage regulating module caused by the fixed adjustment range and adjustment scale of the public voltage regulating circuit." The difference from the optimal value is large, resulting in a large flickering degree of the liquid crystal display device" technical problem

Method used

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  • Public voltage regulation circuit, public voltage regulation method, and liquid crystal display panel
  • Public voltage regulation circuit, public voltage regulation method, and liquid crystal display panel
  • Public voltage regulation circuit, public voltage regulation method, and liquid crystal display panel

Examples

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Embodiment 1

[0041] Such as figure 1 As shown, this embodiment provides a common voltage regulating circuit for providing a common voltage in a liquid crystal display panel. The common voltage regulating circuit includes a discharge voltage regulating module 10, a variable module, a setting resistor 131, and a downstream resistor 40.

[0042] The Discharge Voltage Regulator (DVR) 10 (Discharge Voltage Regulator, DVR) can use an ISL45042 circuit, which has a setting pin SET and an output pin OUT. The input end of the setting resistor 131 is connected to the setting pin SET, and the output end is grounded; the input end of the downstream resistor 40 is connected to the output pin OUT, and the output end is grounded. An output lead 11 is connected to the output pin OUT, and a common voltage is provided to elements such as a common electrode in the liquid crystal display panel through the output lead 11.

[0043] The variable module is a voltage output module 120, the output terminal of which is co...

Embodiment 2

[0062] Below, refer to figure 2 , The common voltage regulation circuit provided by Embodiment 2 will be described. In addition, in this embodiment, the same reference numerals are attached to the same configuration as that of the embodiment 1, and the description thereof is omitted.

[0063] The difference between this embodiment and the first embodiment is that the voltage output module 220 (that is, the variable module) includes a first upstream resistor 221, a second upstream resistor 225, a first voltage transistor 222, and a second voltage transistor 226. The output terminal of the first upstream resistor 221 is connected to the output terminal of the voltage output module 220; the control terminal of the first voltage transistor 222 is connected to the first voltage signal control terminal 224, the input terminal is connected to the first voltage terminal 223, and the output terminal Connect with the input terminal of the first upstream resistor 221. The output terminal ...

Embodiment 3

[0076] Below, refer to image 3 , The common voltage regulation circuit provided in the third embodiment will be described. In addition, in this embodiment, the same reference numerals are attached to the same configuration as that of Embodiment 1, and the description thereof is omitted.

[0077] The common voltage regulating circuit provided in this embodiment is used to provide a common voltage in the liquid crystal display panel. The common voltage regulating circuit includes a discharge voltage regulating module 10, a variable module, an upstream resistor 321 and a downstream resistor 40.

[0078] The discharge voltage regulator module 10 (Discharge Voltage Regulator, DVR, not shown) can use an ISL45042 circuit, which has a setting pin SET and an output pin OUT. The output terminal pins are respectively connected to the output terminal of the upstream resistor 321 and the input terminal of the downstream resistor 40. The input terminal of the upstream resistor 321 is connected ...

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PUM

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Abstract

The invention discloses a public voltage adjusting circuit, a public voltage adjusting method and a liquid crystal display panel, relates to the technical field of liquid crystal display and aims to solve a technical problem of higher flickering degree of a liquid crystal device caused by bigger phase difference between a public voltage value output by the current public voltage adjusting circuit and an optimal value. The public voltage adjusting circuit provided by the invention comprises a discharging voltage adjusting module and a variable module. The discharging voltage adjusting module is used for adjusting public voltage provided for the liquid crystal display panel. The variable module is connected with the discharging voltage adjusting module. The liquid crystal display panel comprises the public voltage adjusting circuit provided by the invention. The public voltage adjusting method is used for using the public voltage adjusting circuit to adjust the public voltage in the liquid crystal display panel. The public voltage adjusting circuit, the public voltage adjusting method and the liquid crystal display panel are used for liquid crystal display devices.

Description

Technical field [0001] The present invention relates to the technical field of liquid crystal display, in particular to a public voltage regulating circuit, a public voltage regulating method, and a liquid crystal display panel. Background technique [0002] The existing liquid crystal display device usually includes a liquid crystal display panel. The liquid crystal display panel includes an upper substrate and a lower substrate disposed oppositely, and a liquid crystal layer filled between the upper substrate and the lower substrate. The upper substrate is provided with a common electrode. Pixel electrodes are provided on the substrate. There is a voltage difference between the pixel electrode and the opposing common electrode. The voltage difference is called the display voltage. The display voltage drives the deflection of the liquid crystal molecules in the liquid crystal layer, so that the liquid crystal display device displays different gray scales, thereby realizing liqui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/3696
Inventor 张剑
Owner BOE TECH GRP CO LTD
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