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Analog source electrode driver output voltage compensating device and method thereof

A technology of output voltage and compensation device, used in instruments, static indicators, etc., can solve problems such as the drop in grade grayscale performance, and achieve the effects of improving picture quality, improving block defects, and eliminating output voltage fluctuations.

Inactive Publication Date: 2007-08-22
CHUNGHWA PICTURE TUBES LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And when the reference level shifts more, the grade grayscale performance between adjacent blocks will have a greater gap

Method used

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  • Analog source electrode driver output voltage compensating device and method thereof
  • Analog source electrode driver output voltage compensating device and method thereof
  • Analog source electrode driver output voltage compensating device and method thereof

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Embodiment Construction

[0045] FIG. 6 is a structural diagram of an analog liquid crystal panel driving system according to an embodiment of the present invention, including a parameter selector (parameter selector) 611, a phase locked loop circuit (phase locked loop) 612, a video decoder (video decoder) 613, and a timing controller. (timing controller) 614 , DC / DC converter (DC / DC converter) 616 , and panel module 615 with analog source drivers 621 - 623 , gate driver 624 and panel 625 with output voltage compensation device 75 . The video decoder 613 is used for data decoding of the input video signal VS, and outputs analog data AD. The timing controller 614 generates the source control signal CS required by the analog source drivers 621 - 623 and the gate control signal CG required by the gate driver 624 . The parameter selector 611 provides the video decoder 613 with decoding parameters required by different video systems. The PLL circuit 612 provides the system frequency required by the timing ...

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Abstract

This invention relates to an output voltage compensation device and a method used in analog source drive, in which, the device includes a voltage addition device, a difference comparator and a filter, first of all, the filter receives a reference level to filter it and outputs it to the difference comparator, then the comparator outputs the difference voltage comparing the analog earth level of the analog source drive and the reference level to the voltage addition device, which compensates the output voltage of the analog source drive with the difference voltage, and the reference level received by the filter is the digital earth level of the drive.

Description

technical field [0001] The present invention relates to an output voltage compensation device and method of a source driver, and in particular to an output voltage compensation device and method of an analog source driver. Background technique [0002] In the system design of small and medium-sized analog LCD panels, it is necessary to integrate the panel, driver, and signal wiring into the same substrate at the same time, so as to provide the maximum flexibility of the product. FIG. 1 is the structure of the above-mentioned panel. Analog source drivers (analog source drivers) 101-103 and gate drivers (gate driver) 104 are arranged around the panel 105, and signal traces 106 and The FPC (flexible printed circuit) interface 110 is connected. In the layout design and production of the actual panel system, as shown in FIG. 2 , the analog ground levels AVSS1 to AVSS3 provided to the analog source drivers 101 to 103 through the signal traces will be affected by the parasitic imp...

Claims

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Application Information

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IPC IPC(8): G09G3/36G09G3/20G02F1/133
Inventor 刘冠宏黄仕泓
Owner CHUNGHWA PICTURE TUBES LTD
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