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Voltage regulator used for liquid crystal display panel

A technology of voltage regulator and liquid crystal panel, which is applied in the direction of instruments and static indicators, etc., which can solve the problems of inconvenient fine-tuning of the common voltage, and achieve the effect of improving the adjustment accuracy and widening the rotation angle range

Inactive Publication Date: 2012-08-01
AU OPTRONICS (SUZHOU) CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when the linear potentiometer in the liquid crystal panel adjusts the common voltage, if the optimum common voltage is plus or minus 0.1V, and the entire adjustment range of the linear potentiometer is 1V, then the moving contact of the potentiometer corresponds to The rotation angle is only 52 degrees, which will make it inconvenient to fine-tune the common voltage

Method used

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  • Voltage regulator used for liquid crystal display panel
  • Voltage regulator used for liquid crystal display panel
  • Voltage regulator used for liquid crystal display panel

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Embodiment Construction

[0021] In order to make the technical content disclosed in this application more detailed and complete, reference may be made to the drawings and the following various specific embodiments of the present invention, and the same symbols in the drawings represent the same or similar components. However, those skilled in the art should understand that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for schematic illustration and are not drawn according to their original scale.

[0022] The specific implementation manners of various aspects of the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Figure 1A In the linear potentiometer, the relationship curve between the resistance change of the resistor body and the rotation angle of the movable piece contact is shown. Figure 1B Shows the relationship curve between the resistance change of ...

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Abstract

The invention provides a voltage regulator, which is suitable for regulating common voltage in a liquid crystal display panel. The voltage regulator comprises a first potentiometer and a second potentiometer, wherein the first and second fixed ends of the first potentiometer are respectively two endpoints of one semicircle, and the first and second fixed ends of the second potentiometer are respectively two endpoints of another semicircle; and the second fixed end of the second potentiometer and the second fixed end of the first potentiometer are connected with a common node. The common voltage is regulated through the position change of the respective mobile end of the first potentiometer and the second potentiometer. According to the voltage regulator, the two potentiometers are symmetrically arranged, the null point of one potentiometer is connected with the null point of the other potentiometer, and the common voltage of the liquid crystal display panel is accurately regulated through the position change of the respective mobile end of the two potentiometers. Compared with the prior art, when the voltage regulator regulates the common voltage with the same variable quantity, the range of the rotation angle of a rotor contact is larger, and the regulation accuracy of the common voltage is increased.

Description

technical field [0001] The present invention relates to a liquid crystal panel, in particular to a voltage regulator used to adjust a common voltage in the liquid crystal panel. Background technique [0002] At present, when adjusting the common voltage in the liquid crystal panel, a linear voltage regulator (such as a linear potentiometer) is often used. Generally, a potentiometer is composed of a resistor body, a fixed piece, a moving piece contact handle and a metal case. When the moving piece contact handle of the potentiometer is turned, the moving piece slides on the resistor body. At this time, the moving piece reaches two The resistance value between the fixed pieces changes. For example, when the resistance from the moving piece to a fixed piece increases, the resistance from the moving piece to the other fixed piece decreases; when the resistance from the moving piece to a fixed piece decreases, the resistance from the moving piece to the other fixed piece decreas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
Inventor 魏广东
Owner AU OPTRONICS (SUZHOU) CORP LTD
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