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Touch screen and touch position determination method

A touch position, touch screen technology, applied in the input/output process of data processing, optics, instruments, etc., can solve the problems of difficult and unfavorable narrow frame design, reduce the number of leads, and facilitate linearity. , the effect of precise touch positioning

Active Publication Date: 2015-04-29
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the large signal volume and strong anti-noise ability of the self-capacitance touch screen, most of them currently use the self-capacitance method to realize the In Cell (embedding the touch panel function into the liquid crystal pixel) technology, but the number of electrodes of the self-capacitance touch screen is very large. Many, taking the pitch (Pitch) of 5mm×5mm as an example, a 5-inch liquid crystal display (Liquid Crystal Display, LCD) needs 264 electrode blocks (Pad), and each electrode block needs to be connected to the display driver ( Inside the Integrated Circuit (IC), there are a large number of leads. If the pitch is designed to be smaller to achieve more accurate touch, more leads need to be drawn out separately. The frame design of the touch screen is bound to be constrained, which is difficult to achieve. Narrow bezel design
[0003] To sum up, in the prior art, a self-capacitive touch screen is used to realize the In Cell technology, and each electrode block needs to lead out a lead wire separately. The number of lead wires is large, and the frame of the touch screen is bound to be restricted, which is not conducive to the realization of a narrow frame design.

Method used

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  • Touch screen and touch position determination method

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0040] Embodiment 1: Both the first touch electrodes and the second touch electrodes are disposed on the common electrode layer. During specific implementation, the first touch electrode and the second touch electrode can reuse the common electrode layer, and the common electrode layer can be cut into figure 1 In the structure shown, the first touch electrodes are laterally connected by horizontal scanning lines, and the horizontal scanning lines may be gate layer metal.

Embodiment approach 2

[0041] Embodiment 2: Both the first touch electrodes and the second touch electrodes are disposed on the color filter substrate. The first touch electrodes and the second touch electrodes are fabricated as metal grids on the color filter substrate, and a black matrix (BlackMatrix, BM) is used to shield the first touch electrodes and the second touch electrodes.

Embodiment approach 3

[0042] Embodiment 3: The first touch electrodes are multiplexed with a common electrode layer and disposed on the common electrode layer, and the second touch electrodes are disposed on the color filter substrate.

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PUM

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Abstract

The invention discloses a touch screen and a touch position determination method for reducing the number of leads of the touch screen and realizing narrow borders. The touch screen comprises multiple touch electrodes and multiple horizontal scanning lines, and each horizontal scanning line is connected with the touch electrode on the same narrow.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a touch screen and a method for determining a touch position. Background technique [0002] Due to the large signal volume and strong anti-noise ability of the self-capacitance touch screen, most of them currently use the self-capacitance method to realize the In Cell (embedding the touch panel function into the liquid crystal pixel) technology, but the number of electrodes of the self-capacitance touch screen is very large. Many, taking the pitch (Pitch) of 5mm×5mm as an example, a 5-inch liquid crystal display (Liquid Crystal Display, LCD) needs 264 electrode blocks (Pad), and each electrode block needs to be connected to the display driver ( Inside the Integrated Circuit (IC), there are a large number of leads. If the pitch is designed to be smaller to achieve more accurate touch, more leads need to be drawn out separately. The frame design of the touch screen i...

Claims

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Application Information

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IPC IPC(8): G06F3/044
CPCG06F3/0418G06F3/044G06F2203/04103G06F3/0412G06F2203/04104G06F3/04166G06F3/0446G02F1/13338G02F1/133512G02F1/133514G02F1/134336G02F1/13439G02F2201/121
Inventor 丁小梁王海生刘英明杨盛际任涛刘伟
Owner BOE TECH GRP CO LTD