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Terminal equipment and touch detection system thereof

A technology for touch detection and terminal equipment, applied in the field of touch detection systems and terminal equipment, can solve the problems of occupying terminal equipment space and complicated structure, and achieve the effect of simplifying the structure and improving the sensitivity

Active Publication Date: 2014-02-19
FOCALTECH SYST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, when detecting self-capacitance and mutual capacitance, different touch detection circuits need to be used for detection, which will occupy a certain space of the terminal device, and the structure is cumbersome.

Method used

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  • Terminal equipment and touch detection system thereof
  • Terminal equipment and touch detection system thereof
  • Terminal equipment and touch detection system thereof

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] An embodiment of the present invention provides a touch detection system, which is mainly applied to capacitive touch screen terminal equipment, such terminal equipment includes such as figure 1 As shown in the capacitive touch screen, the capacitive touch screen may include a touch shell 101, and multiple pairs of sensing electrodes 102 and 103. Each pair of sensing electrodes has a different polarity and can form mutual capacitance. In the space under the t...

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Abstract

An embodiment of the invention discloses terminal equipment and a touch detection system thereof, and is applied to the technical field of electronic equipment. In the touch detection system, after a mutual capacitor and a self capacitor are charged through a capacitor charging / discharging circuit, a detection circuit of the mutual capacitor and the self capacitor can be multiplexed, in other words, the capacitor charging / discharging circuit is connected to an amplifier, electric charges in the self capacitor or the mutual capacitor are transferred to an output end through a capacitor between an output end and one input end of the amplifier, and a signal processing unit is enabled to be capable of effectively determining touch on a capacitive touch screen of the terminal equipment according to voltage output by the output end of the amplifier through a reference signal source connected with another input end of the amplifier. In the process of touch detection, different circuits are not needed to detect the mutual capacitor and the self capacitor, so that a structure, for detecting the circumstance that a user touches the capacitive touch screen, in the terminal equipment is simplified.

Description

technical field [0001] The invention relates to the technical field of electronic equipment, in particular to a touch detection system of a terminal equipment and the terminal equipment. Background technique [0002] The existing capacitive touch screen terminal equipment includes a capacitive touch screen and a touch detection circuit. The capacitive touch screen includes a touch shell exposed outside the terminal device and visible to the user, and sensing electrodes for sensing the user's touch on the capacitive touch screen, wherein the sensing electrodes Self-capacitance is formed with the system ground of the terminal equipment, and mutual capacitance is formed between sensing electrodes of different poles, so that when the user touches the touch shell, the self-capacitance and mutual capacitance of the sensing electrodes set under the touch shell will change , and the touch detection circuit determines the user's touch on the capacitive touch screen of the terminal de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F3/0416G06F3/044G06F3/04164
Inventor 莫良华胡海军刘卫平
Owner FOCALTECH SYST LTD
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