A common voltage generating circuit, a source driving circuit and a liquid crystal display device

A common voltage and circuit generation technology, applied in static indicators, instruments, etc., can solve the problem of liquid crystal display panel inversion and other problems, and achieve the effect of avoiding the phenomenon of inversion.

Active Publication Date: 2021-01-15
KUSN INFOVISION OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a common voltage generation circuit, a source drive circuit and a liquid crystal display device, which can solve the problem of reverse color phenomenon on the liquid crystal display panel

Method used

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  • A common voltage generating circuit, a source driving circuit and a liquid crystal display device
  • A common voltage generating circuit, a source driving circuit and a liquid crystal display device
  • A common voltage generating circuit, a source driving circuit and a liquid crystal display device

Examples

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no. 1 example

[0025]Please refer tofigure 1 ,figure 1 It is a schematic diagram of the connection of the common voltage generating circuit of an embodiment. Such asfigure 1 As shown, the common voltage generating circuit of this embodiment includes a common voltage generating circuit 100. The common voltage generating circuit 100 receives a first common voltage VCOM1 and a second common voltage VCOM2, and reverses the polarity according to the output of the source driving circuit 200 The control signal POL outputs the first AC common voltage ACVCOM1 and the second AC common voltage ACVCOM2 with opposite polarities, and the first AC common voltage ACVCOM1 or the second AC common voltage ACVCOM2 and the source drive circuit 200 output on the corresponding data line Data signal (figure 1 S1, S2...Sn) have the same polarity, and the data signal and the AC common voltage with the same polarity as the data signal act together on the same pixel unit of the display panel 300.

[0026]Specifically, the commo...

no. 2 example

[0032]figure 2 It is a circuit connection diagram of the common voltage generating circuit of an embodiment. Such asfigure 2 As shown, this embodiment provides a specific circuit connection of the common voltage generating circuit 100 in the common voltage generating circuit. The common voltage generating circuit 100 includes a first switching element T1, a second switching element T2, a third switching element T3, a fourth switching element T4, and a first inverting element 101. The first switching element T1 includes a first control terminal, a first path terminal, and a second path terminal. The first control terminal of the first switching element T1 receives the polarity inversion control signal POL, and the second path terminal of the first switching element T1 Receive the second common voltage VCOM2. The second switching element T2 includes a second control terminal, a third channel terminal, and a fourth channel terminal. The second control terminal of the second switching e...

no. 3 example

[0042]image 3 It is a related waveform diagram of the output voltage of the common voltage generating circuit of an embodiment. In this example, the first AC common voltage ACVCOM1 and the source drive circuit 200 have the same polarity of the data signal output on the odd column data line, and the second AC common voltage ACVCOM2 and the source drive circuit 200 are on the even column data line. The polarity of the data signal output on theimage 3 Waveform diagram shown.

[0043]Specifically, the first AC common voltage ACVCOM1 and the second AC common voltage ACVCOM2 are inverted with each polarity inversion of the polarity inversion control signal POL, and the first AC common voltage ACVCOM1 and the source The polarity of the data signal Odd Source output by the pole drive circuit 200 on the data line of the odd column is consistent, so that the first AC common voltage ACVCOM1 and the data signal Odd Source output by the source drive circuit 200 on the data line of the odd column wo...

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Abstract

The present invention provides a common voltage generation circuit. The common voltage generation circuit receives a first common voltage and a second common voltage, outputs a first alternating current common voltage and a second alternating current common voltage with opposite poles according to polarity-reversal control signals, and polarities of data signals output on corresponding data linesof the first alternating current common voltage or the second alternating current common voltage and the source drive circuit are consistent, and the data signals and the alternating current common voltages with the consistent polarity to the data signals are commonly acted the same pixel unit of a display panel. The present invention further provides a source drive circuit and a liquid crystal display device. The common voltage generation circuit, the source drive circuit and the liquid crystal display device allow the polarities of data signals output on corresponding data lines of the firstalternating current common voltage or the second alternating current common voltage and the source drive circuit to be consistent so as to avoid the generation of the inverse phenomenon on the liquidcrystal display panel.

Description

Technical field[0001]The invention relates to the field of liquid crystal display, in particular to a common voltage generating circuit, a source driving circuit and a liquid crystal display device.Background technique[0002]Liquid Crystal Display (LCD) has many advantages, such as light and thin, energy saving, and non-radiation. Therefore, it has gradually replaced traditional cathode ray tube (CRT) displays. At present, liquid crystal displays are widely used in high-definition digital televisions, desktop computers, personal digital assistants (PDAs), notebook computers, mobile phones, digital cameras and other electronic devices.[0003]Currently, in order to meet people's various needs for liquid crystal display performance, liquid crystal displays include wide viewing angle display modes, narrow viewing angle display modes and other display modes. For example, in situations where privacy protection is required, the liquid crystal display needs to be adjusted to a narrow viewing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/3614G09G3/3688G09G3/3696
Inventor 王晴闫小能张若男吴二平
Owner KUSN INFOVISION OPTOELECTRONICS
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