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Touch device detection method

A technology of touch device and touch screen, which is applied in the direction of measuring device, measuring electricity, measuring electric variables, etc., can solve the problems of wasting time and increasing difficulty, and achieve the effect of simple method and cost saving

Active Publication Date: 2013-01-09
CHIPONE TECH BEIJINGCO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This must increase the difficulty and waste time

Method used

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] The method for detecting a touch device in the present invention firstly relates to the structure of a capacitive touch screen. refer to figure 1 As shown, the capacitive touch screen 10 is mainly composed of driving lines 20 and sensing lines 30 to form an electrode matrix. The driving lines 20 and sensing lines 30 are intersected to form a mutual inductance capacitance 50. The driving lines 20 and sensing lines 30 The electrodes respectively constitute the two poles of the mutual inductance capacitor 50. When the finger touches the capacitive screen, a coupling capacitance is generated with the two electrodes near the touch point 70, resulting in a change in the capacitance between the two electrodes. During detection, the drive line 20 passes through the drive circuit Signals are sent in sequence at 40 minutes. When one or more drive lines ar...

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Abstract

The invention relates to a touch device detection method. The touch device comprises a capacitive screen and a capacitive screen control chip, wherein a plurality of drive lines and sense lines which are placed in a crossed way are arranged on the capacitive screen; when a touch device is detected, all drive lines are driven in sequence, and the mutual capacitance value between each drive line and each sense line is measured; and whether the touch device has a defect is detected by judging whether the mutual capacitance value is in a threshold interval. According to the touch device detection method provided by the invention, whether the touch device has abnormity is detected by detecting the capacitance instead of conventional mechanical detection steps; the method is simple and convenient; whether the touch device has the abnormity can be judged rapidly and accurately; and therefore, defective products are prevented from flowing into the next process, and the cost is saved.

Description

technical field [0001] The invention relates to a detection method of a touch device, in particular to a defect detection method of a projected capacitive touch screen. Background technique [0002] As a new type of human-computer interaction interface, the touch screen is widely used in various digital information systems due to its advantages of ease of use, durability, fast response, and space saving. Among them, the projected capacitive touch screen is characterized by its high comfort and The highly interactive and humanized user experience provides a good solution for the human-computer interaction interface of information processing. [0003] In recent years, many manufacturers have actively invested in R&D and production of capacitive touch screens. However, the production process of capacitive touch screens is quite complicated. Except for a few large manufacturers, many small and medium-sized enterprises that have just entered this field have low production efficie...

Claims

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Application Information

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IPC IPC(8): G01R31/02
Inventor 张晋芳刘宏辉田志民
Owner CHIPONE TECH BEIJINGCO LTD
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