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In cell touch panel and display device

A built-in touch screen, in-area technology, applied in the direction of instrument, electrical digital data processing, data processing input/output process, etc. Effects of touch signal-to-noise ratio and touch sensitivity

Inactive Publication Date: 2015-09-09
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in a self-capacitance touch screen, when the base capacitance of the self-capacitance electrode is large, the relative change in capacitance caused by the human body touching the screen is small, thus affecting the signal-to-noise ratio of the touch

Method used

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  • In cell touch panel and display device
  • In cell touch panel and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Such as Figure 6a As shown, the in-cell touch screen includes a plurality of sub-pixels 05 ( Figure 6a The specific structure of the sub-pixels is not shown in the figure), the two gate lines gate between the sub-pixels 05 in adjacent rows, with each two adjacent columns of sub-pixels 05 as a pixel group, share a gate line located between the two columns of sub-pixels The data line data between pixels 05. The common electrode composed of the self-capacitance electrode 02 connects the corresponding self-capacitance electrode 02 to the wire 06 of the driving circuit, wherein the wire 06 and the data line data are mutually insulated, arranged in the same layer and in parallel, and each wire 06 is connected to the corresponding wire through a via hole. The self-capacitance electrodes 02 are connected and arranged in gaps between adjacent pixel groups. It also includes: a plurality of segments of fourth connecting wires 07 located in the area corresponding to each wire 0...

Embodiment 2

[0113] Such as Figure 7a As shown, the in-cell touch screen includes a plurality of sub-pixels 05 ( Figure 7a The specific structure of the sub-pixel is not shown in the figure), the two data lines data between the sub-pixels 05 in adjacent columns, each two adjacent rows of sub-pixels 05 as a pixel group, share a data line located in the two rows of sub-pixels The grid line gate between pixel 05. The common electrode composed of the self-capacitance electrode 02 connects the corresponding self-capacitance electrode 02 to the wire 06 of the drive circuit, wherein the wire 06 is insulated from the gate line gate, arranged in the same layer and in parallel, and each wire 06 passes through the via hole and the corresponding wire 06 The self-capacitance electrodes 02 are connected and arranged in gaps between adjacent pixel groups. It also includes: multiple segments of fourth connecting wires 07 located in the area corresponding to each wire 06 and electrically connected to t...

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Abstract

The invention discloses an in cell touch panel and a display device. The in cell touch panel comprises a lower substrate, an upper substrate, a self-capacitance electrode, a ground electrode and a driving circuit, wherein the lower substrate and the upper substrate are arranged in a face-to-face mode, the self-capacitance electrode is arranged between the upper substrate and the lower substrate, the ground electrode corresponds to the self-capacitance electrode, and the driving circuit is used for applying signals to the self-capacitance electrode and the ground electrode. The driving circuit is used for applying the same touch control scanning signals to the self-capacitance electrode and the ground electrode at the same time in the touch control stage. In this way, when the signals on the to the self-capacitance electrode and the signals on the ground electrode are the same in the touch control stage, the voltage of the self-capacitance electrode and the voltage of the ground electrode are equal all the time theoretically, namely, the difference between the voltage of the self-capacitance electrode and the voltage of the ground electrode is equal to zero, and therefore the capacitance of the self-capacitance electrode relative to the ground electrode is equal to zero. Due to the fact that the Base capacitance of the self-capacitance electrode is relatively smaller, the body capacitance can be larger than the Base capacitance when a human body conducts touch control, the relative change quantity of the capacitance can be large, and the purposes of increasing the touch control signal-to-noise ratio and improving the touch control sensitivity of the touch panel are achieved.

Description

technical field [0001] The invention relates to the field of touch technology, in particular to an embedded touch screen and a display device. Background technique [0002] With the rapid development of display technology, touch screen panels (Touch Screen Panels) have gradually spread in people's lives. Currently, touch panels can be classified into: Add on Mode Touch Panel, On Cell Touch Panel, and In Cell Touch Panel according to their composition and structure. Among them, the plug-in touch screen is produced separately from the touch screen and Liquid Crystal Display (LCD), and then bonded together to form a liquid crystal display with touch function. The plug-in touch screen has high production costs and low light transmittance. Low, thick modules and other shortcomings. The embedded touch screen embeds the touch electrodes of the touch screen inside the liquid crystal display, which can reduce the overall thickness of the module and greatly reduce the production cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F3/0412G06F2203/04107G06F3/04166G06F3/04164G06F3/0443G06F3/0448
Inventor 赵卫杰董学杨盛际刘英明
Owner BOE TECH GRP CO LTD
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