A source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof

A technology of reference voltage and source drive, applied in instruments, static indicators, etc., can solve the problems of reduced panel design flexibility and inability to reduce panel cost

Inactive Publication Date: 2013-10-30
WINTEK CHINA TECH LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, not only the design flexibility of the panel will be greatly reduced, but also the cost of the panel cannot be reduced

Method used

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  • A source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof
  • A source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof
  • A source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof

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Embodiment Construction

[0044] Please refer to image 3 , image 3It is a schematic diagram illustrating a display system 300 with an adjustable output gamma reference voltage. The controller 302 in the display system 300 generates a polarity control signal corresponding to the panel type according to the panel type. That is, when the source driving circuit 304 is used to drive the liquid crystal panel 306, the controller 302 generates the polarity control signal PCS1 corresponding to the liquid crystal panel 306 to the timing control circuit 307 according to the liquid crystal panel 306; when the source driving circuit 304 is When used to drive the OLED panel 308 , the controller 302 generates a polarity control signal PCS2 corresponding to the OLED panel 308 to the timing control circuit 307 according to the OLED panel 308 . Then, the timing control circuit 307 generates a polarity signal PS1 corresponding to the liquid crystal panel 306 to the source driving circuit 304 according to the polarity...

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PUM

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Abstract

The invention discloses a source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof. The method comprises: based on the panel categories of display panels in the panel categories of a plurality of display panels, generating polarity control signals corresponding to the panel categories, wherein the plurality of polarity control signals corresponding to the panel categories of the plurality of display panels are different; based on the polarity control signals, generating polarity signals corresponding to the display panels; and based on the polarity signals, generating and outputting the plurality of gamma reference voltages, wherein the plurality of gamma reference voltages comprise a group of positive polarity gamma reference voltages and a group of negative polarity gamma reference voltages and the number of voltages of the group of polarity gamma reference voltages is the same with the number of voltages of the group of negative polarity gamma reference voltages. Therefore, design flexibility of the source drive circuit and the display panels is improved and cost of the display panels is reduced.

Description

technical field [0001] The present invention relates to a method for outputting a gamma reference voltage and a source driving circuit, in particular to a method and a source driving circuit for adjusting the output gamma reference voltage. Background technique [0002] Because the liquid crystal of the liquid crystal panel cannot be driven by a voltage of the same polarity for a long time, the polarity of the liquid crystal of the liquid crystal panel must be continuously reversed to prevent the liquid crystal of the liquid crystal panel from being polarized. Generally speaking, the inversion forms of the liquid crystal of the liquid crystal panel can be divided into column inversion, row inversion, dot inversion and frame inversion. Please refer to Figure 1A , Figure 1B and Figure 1C , Figure 1D , Figure 1A It is a schematic diagram for illustrating the inversion of the liquid crystal columns of the liquid crystal panel, Figure 1B It is a schematic diagram for il...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/32G09G3/3266
Inventor 许景富张廷宇蔡罗贤许辰合
Owner WINTEK CHINA TECH LTD
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