Touch detection method and touch device

A touch detection and touch device technology, applied in the field of touch detection methods and touch devices, can solve the problems of submerging the measured capacitance signal, interference, etc., achieve the effects of reducing physical parameters, improving linearity, and improving detection accuracy

Active Publication Date: 2015-09-02
BYD SEMICON CO LTD
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Problems solved by technology

Moreover, stray capacitance will change with many factors such as temperature, location, internal and external electric field distribution, etc., which will interfere or even submerge the measured capacitance signal

Method used

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  • Touch detection method and touch device
  • Touch detection method and touch device
  • Touch detection method and touch device

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Embodiment Construction

[0033] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

[0034] The embodiment of the present invention proposes a novel self-capacitance detection method. When the sensing unit is touched, the touch point can divide the sensing unit into two resistances, which can be determined by considering the two resistances while performing self-capacitance detection. The position of the touch point on the sensing unit. like image 3 As shown, it is a schematic diagram of the detection principle of the touch device according to the embodiment of the...

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Abstract

A touch detecting method, a touch sensitive device, and a portable electronic apparatus are provided. The touch detecting method comprises: applying a high level signal to one of a first electrode and a second electrode of one induction unit, and grounding the other to charge a self capacitor for a first time; applying high level signals to the first electrode and the second electrode to charge the self capacitor for a second time; detecting from a corresponding first electrode or a corresponding second electrode of the one induction unit to obtain a first detecting variation; grounding the first electrode and the second electrode; detecting from the corresponding first electrode or the corresponding second electrode to obtain a second detecting variation; calculating a ratio between a first resistor and a second resistor; and determining a touch position according to the ratio between the first resistor and the second resistor.

Description

technical field [0001] The present invention relates to the technical field of electronic equipment design and manufacture, and in particular, to a touch detection method and a touch control device. Background technique [0002] At present, the application scope of touch screen has rapidly expanded from niche commercial markets such as bank ATMs and industrial computers to mobile phones, PDAs (personal digital assistants), GPS (global positioning systems), PMPs (MP3, MP4, etc.), and even tablet computers. and other mass consumer electronics. The touch screen has the advantages of simple, convenient and user-friendly touch operation, so the touch screen is expected to become the best interface for human-computer interaction and has been widely used in portable devices. [0003] Capacitive touch screens are usually divided into two categories: self-capacitance and mutual capacitance. like figure 1 As shown, it is a structural diagram of a common self-capacitance touch scree...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
CPCG06F3/044G06F3/0443G06F3/0448
Inventor 李振刚黄臣杨云
Owner BYD SEMICON CO LTD
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