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A double-layer capacitive touch screen

A double-layer capacitance and touch screen technology, applied in the input/output process of electrical digital data processing, instruments, and data processing, etc., can solve problems such as poor waterproof effect, touch screen interference, and low effective capacitance ratio.

Active Publication Date: 2017-05-31
CHIPONE TECH BEIJINGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes the overlapping capacitance between the sensing electrode and the driving electrode, that is, Csig is very large, resulting in a relatively small effective permittivity
Moreover, due to the wide width of the upper sensing electrode, water droplets are likely to interfere with the touch screen, resulting in poor waterproof effect

Method used

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  • A double-layer capacitive touch screen
  • A double-layer capacitive touch screen
  • A double-layer capacitive touch screen

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Experimental program
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Embodiment Construction

[0023] figure 2 It is a schematic diagram of the driving electrode structure of the double-layer capacitive touch screen in this application. Each horizontal bar is a driving electrode, for example, T1 is the first driving electrode, and 16 driving electrodes are shown in the figure. Hollow out part of the area where the driving electrode overlaps with the sensing electrode, such as figure 2 4 rectangles are dug out in each position, but those skilled in the art can imagine that other shapes and any number of parts can be dug out. Here, the applicant does not explain other shapes and numbers, because the principles are the same, all By reducing the overlapping area of ​​the sensing electrodes and the driving electrodes, the overlapping capacitance Csig is reduced, and the effective capacitance is increased under the same touch intensity, thereby improving the sensitivity of the touch screen.

[0024] image 3 It is a schematic diagram of the overall structure of the paten...

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Abstract

The invention relates to a double-layer capacitive touch screen which has the advantages of good waterproof performance, high light transmittance and high sensitivity. The double-layer capacitive touch screen comprises a transparent insulating substrate and a first indium tin oxide (ITO) coating layer formed on one face of the transparent insulating substrate; the ITO coating layer is subjected to etching treatment so as to form a plurality of driving electrodes; the driving electrodes are of strip shapes and are parallelly arranged along a first direction, and each transverse strip is one driving electrode; a transparent dielectric layer is formed on the first ITO coating layer; a second ITO coating layer is formed on the transparent dielectric layer and is subjected to the etching treatment so as to form a plurality of sensing electrodes which are vertical to the direction of the driving electrodes; the sensing electrodes are of strip shapes and are smaller than the driving electrodes in width; partial area of the driving electrodes vertically overlapped with the sensing electrodes is excavated; and argon ITO is filled between every two sensing electrodes.

Description

[0001] Technical field: [0002] The invention relates to a touch screen, in particular to the structure of a mutual capacitance active touch screen. [0003] Background technique: [0004] In the current touch screen field, there are mainly resistive touch screens, photoelectric touch screens, surface acoustic wave touch screens and capacitive touch screens. [0005] Resistive touch screen is still the leading product in the market at present, but the structure of the double-layer substrate of the resistive touch screen makes the touch screen and the display panel overlapped and used together, the reflection of the touch screen greatly affects the display brightness, contrast, color saturation, etc. The quality of the entire display will be greatly reduced, and increasing the brightness of the backlight of the display panel will also increase the power consumption; the analog resistive touch screen has the problem of positioning drift, which needs to be calibrated frequently; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 张晋芳曲孔宁
Owner CHIPONE TECH BEIJINGCO LTD