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Touch screen

A touch screen and touch technology, which is applied in the field of touch screen, can solve the problems of flickering display screen, long time occupation, and lower reliability, so as to achieve the effect of improving reliability, improving precision, and reducing requirements

Inactive Publication Date: 2007-09-12
新励科技(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the proposed scheme requires the matrix display to be led out from both ends of the row electrode and the column electrode, which is different from the usual display electrode wiring method, and this kind of touch-sensitive display screen needs to be specially designed and manufactured; in addition, This method of drawing lines from both ends of the row electrodes and the column electrodes of the display to connect the display driving circuit and the touch detection circuit is too complicated, which not only increases the cost but also reduces the reliability; The method of detecting touches one by one in the two directions of the row and column takes a long time, and it is easy to cause the display screen to flicker

Method used

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specific Embodiment approach 1

[0041] The touch screen 100 shown in FIG. 1 includes a first touch detection electrode line 110 and a second touch detection electrode line 120 with AC bulk resistance, and a first sensing electrode group 130 insulated from each other on different layers. and the second sensing electrode group 140 . The first sensing electrode group 130 includes M sensing electrode lines parallel to each other, which are sensing electrode lines 131, 132, . . . , 13x (2<x<M), . The sensing electrode group 140 includes N sensing electrode lines parallel to each other, which are sensing electrode lines 141, 142, . . . , 14y (2<y<N), . . . , 14N. The measuring electrode lines perpendicularly intersect the sensing electrode lines in the second sensing electrode group 140 respectively. The first touch detection electrode line 110 intersects with the first sensing electrode group 130, the second touch detection electrode line 120 intersects with the second sensing electrode group 140, and the touch ...

specific Embodiment approach 2

[0045] The touch screen 200 shown in FIG. 2 includes a first touch detection electrode line 210 and a second touch detection electrode line 220 with AC volume resistance, and a sensing electrode group 230 with AC volume resistance. The sensing electrode group 230 includes N sensing electrode lines, which are sensing electrode lines 231, 232, . . . , 23x (2<x<N), . The two touch detection electrode lines 220 intersect with the sensing electrode group 230, and the positions where the first touch detection electrode line 210 and the second touch detection electrode line 220 intersect with the sensing electrode group 230 are respectively biased toward the two sides of the sensing electrode group. end. The touch detection electrode lines and each sensing electrode line of the sensing electrode group are respectively coupled with at least one passive device or active device among capacitance, inductance, and resistance to transmit touch signals. The adjacent coupling points of the ...

specific Embodiment approach 3

[0049] The touch screen 300 shown in FIG. 3 includes a first touch detection electrode group on different layers, a second touch detection electrode group, and a first sensor on different layers that are insulated from each other and have an AC bulk resistance. The measuring electrode set 330 and the second sensing electrode set 340. The first touch detection electrode group includes a first touch detection electrode line 311, a second touch detection electrode line 312, and the second touch detection electrode group includes a third touch detection electrode line 321, a fourth touch detection electrode line control detection electrode lines 322, the first sensing electrode group 330 has M sensing electrode lines 331, 332, ..., 33x (2<x<M), ..., 33M, and the second sensing electrode group 340 has N Electrode lines 341, 342, . . . , 34y (2<y<N), . . . , 34N. The first touch detection electrode line 311, the second touch detection electrode line 312 intersect with the first sen...

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Abstract

The invention discloses a touch screen, comprising touch detection circuit, sensing electrodes able to be coupled with touch object, and touch detection electrodes connected with the touch detection circuit, where the number of touch detection electrodes is less than that of sensing electrodes, the touch detection electrodes can be coupled with the sensing electrodes, the touch detection circuit is used to detect and compare signals on the touch detection electrodes as touch does not happen and as touch happens. And it can only detect a small number of touch detection electrodes to be able to find the position of the touch object. And it largely reduces requirements for detection technique, and its circuit structure is simple, beneficial to improving the accuracy and reducing the cost and shortening the time for touch locating detection.

Description

technical field [0001] The invention relates to a positioning input device, in particular to a touch screen. Background technique [0002] Current capacitive touch screens can be divided into two types: digital and analog. The digital capacitive touch screen is composed of two layers of electrodes with multiple parallel electrodes on each layer, and the two layers of electrodes are orthogonal to each other. A touch excitation signal is applied to each electrode. When a human finger touches the touch screen, the finger forms a coupling capacitance with certain electrodes on the touch screen, and a leakage current flows from the coupling capacitance. The touch detection circuit determines the touch position by detecting the leakage current and determining the two orthogonal electrodes forming a coupling capacitance with the finger on the two layers of electrodes. This method is only suitable for coarser positioning. When fine positioning is required, it is necessary to make ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
Inventor 陈其良
Owner 新励科技(深圳)有限公司
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