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Embedded touch display device, common voltage supply device and supply method thereof

A common voltage and supply device technology, applied in the direction of static indicators, electrical digital data processing, instruments, etc., can solve the problems of lower display quality of embedded touch display panels, achieve stable voltage levels, and reduce parasitic capacitance values Effect

Active Publication Date: 2021-11-02
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During scanning, if the voltage level of the common voltage VCOM1 cannot be restored to the target voltage, the display quality of the in-cell touch display panel will be reduced accordingly

Method used

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  • Embedded touch display device, common voltage supply device and supply method thereof
  • Embedded touch display device, common voltage supply device and supply method thereof
  • Embedded touch display device, common voltage supply device and supply method thereof

Examples

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Embodiment Construction

[0037] Please refer to figure 2 , figure 2 is a schematic diagram illustrating an in-cell touch display device according to an embodiment of the present invention. The in-cell touch display device 200 includes a panel 201 and a common voltage supply device 202 . The panel 201 is coupled to a common voltage supply device 202 . The panel 201 may be an in-cell touch display panel and includes a plurality of common voltage blocks CB11-CBNM, and the common voltage blocks CB11-CBNM are arranged in a group of arrays figure 2 , the common voltage blocks CB11-CBNM can be divided into a plurality of common voltage block columns CVC1-VCN. In addition, the panel 201 further receives a plurality of gate line signals G1-GD, and the gate line signals G1-GD can be divided into a plurality of gate line signal groups and the gate line signal groups are respectively transmitted to the common voltage area Block columns CVC1-VCN. For example, the common voltage block column CVC1 is located...

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PUM

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Abstract

The invention provides an in-cell touch display device, a common voltage supply device and a supply method. The common voltage supply device includes a channel selector and a voltage generator. The channel selector is coupled to the in-cell touch display panel, and is used for selecting and connecting multiple first common voltage blocks to the first channel and connecting multiple second common voltage blocks according to multiple gate line signals To the second channel, wherein the first common voltage block is located on the scanned gate line and the second common voltage block is located on a plurality of unscanned gate lines, and the plurality of gate line signals are respectively scanned The gate lines and the gate lines not being scanned are received. The voltage generator is coupled to the first channel and at least one second channel and provides a first common voltage to the first channel.

Description

technical field [0001] The invention relates to an embedded touch display device. More specifically, it relates to a common voltage supply device of an in-cell touch display device and a method for providing a common voltage. Background technique [0002] Please refer to figure 1 , figure 1 A schematic diagram of a common voltage supply device in the prior art is shown. exist figure 1 Among them, the common voltage generating buffer BUF1 is used to provide the common voltage VCOM1 to all the common voltage blocks in the in-cell touch display panel. The common voltage generation buffer BUF1 receives the input voltage VIN, and provides the common voltage VCOM1 to the common voltage block through a path having a resistance value Rr, and the common voltage block has a connection between the source line and the corresponding common voltage block. The parasitic capacitance C1 generated between them. When the in-cell touch display panel is operated, the parasitic capacitor C1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/041
CPCG06F3/0412G09G3/3655G09G2310/0218G09G2320/0204G09G2320/0219G09G2320/0223G06F3/04166G09G3/2092
Inventor 王伟松张耀光
Owner HIMAX TECH LTD
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