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Capacitance type touch screen with bi-layer structure

A capacitive touch screen, double-layer structure technology, applied in the direction of electrical digital data processing, instrument, user/computer interaction input/output, etc., can solve the problems of small effective capacitance, large resistance of sensing line, poor waterproof performance, etc. Achieve the effect of small resistance of the induction line and good waterproof performance

Active Publication Date: 2015-02-04
SHENZHEN FOCALTECH SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the screen structure of the traditional diamond-shaped driving line and diamond-shaped sensing line has poor waterproof performance, high resistance of the sensing line, small effective permittivity, and insufficient spatial uniformity of touch.

Method used

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  • Capacitance type touch screen with bi-layer structure
  • Capacitance type touch screen with bi-layer structure
  • Capacitance type touch screen with bi-layer structure

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0026] Such as Figure 1 to Figure 4 The shown embodiment 1 of the double-layer structure capacitive touch screen of the present invention is a two-layer ITO structure, including a driving layer and a sensing layer. The driving layer and the sensing layer are respectively made on two layers of ITO films. fit. The driving layer includes many driving lines 1 parallel to each other with constant width, the sensing layer includes many ITO sensing lines 2 parallel to each other, and the driving lines 1 and ITO sensing lines 2 are perpendicular to each other. The ITO sensing line 2 is bead-shaped and is composed of many identical sensing units 201 in series. In each sensing line 2, the number of series sensing units 201 is the same as the number of driving lines 1. These sensing units 201 are the same hourglass shape ( or olive shape), in this embodiment, the edge lines on both sides of the hourglass-shaped sensing unit 201 are concave fold lines.

[0027] The pitch between the se...

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Abstract

The invention discloses a capacitance type touch screen with a bi-layer structure, which comprises a driving layer and an inductive layer. The driving layer comprises a plurality of mutually-parallel driving lines, the inductive layer comprises a plurality of mutually-parallel ITO (Indium Tin Oxide) inductive lines, and the driving lines are mutually vertical to the ITO inductive lines. The driving lines have the constant widths, the ITO inductive lines are of a string of bead shape and are formed by connecting a plurality of same inductive units in series, and each inducting unit is of a sandglass or olive shape. Compared with traditional screen body structures of rhombic driving lines and rhombic inductive lines, the capacitance type touch screen with the bi-layer structure disclosed by the invention has the advantages of reducing the resistances of the inductive lines, increasing the effective capacitance and improving the space uniformity of the touch by changing the shapes of the upper layer inductive lines on the premise of not losing a capacitance touch property.

Description

[technical field] [0001] The invention relates to touch screen technology, in particular to a double-layer capacitive touch screen. [Background technique] [0002] The touch screen can be realized in many ways, and the popular ones include resistive touch screen, capacitive touch screen, surface infrared touch screen and so on. Among them, the resistive touch screen has been popular for many years because of its low cost, easy implementation, and simple control. Recently, capacitive touch screens have been welcomed by the public for their high light transmittance, wear resistance, resistance to environmental (temperature, humidity, etc.) changes, long life, and the ability to realize advanced complex functions (such as multi-touch). [0003] The use of capacitance changes as a sensing principle has a long history. For a touchscreen to work effectively, a transparent capacitive sensing array is required. When the human body approaches or touches the electrode of the capaci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/03G06F3/044
Inventor 彭玲莫良华
Owner SHENZHEN FOCALTECH SYST