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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 submerged capacitive signals to be measured, interference, etc., and achieve the effects of reducing the measurement of physical quantities, improving linearity, and ensuring detection speed.

Active Publication Date: 2013-01-30
BYD SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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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

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0033] 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, and the self-capacitance detection can be determined by considering these two resistances at the same time. The position of the touch point on the sensing unit. Such as image 3 As shown, it is a schematic diagram of the detection principle of the touch device according to the embodiment of the present invention. When a finger touches the s...

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Abstract

The invention provides a touch detection method and a touch device. The method comprises the following steps of: applying a high level signal to one of a first electrode and a second electrode in one of a plurality of sensing units, and grounding the other one of the first electrode and the second electrode to carry out first charging; applying high level signals to the first electrode and the second electrode to carry out second charging; grounding the first electrode and the second electrode of the sensing unit or grounding one of the first electrode and the second electrode and disconnecting the other one of the first electrode and the second electrode to carry out first discharging on self capacitors; detecting the corresponding first electrode or second electrode to obtain a second detection variation value between second charging and first discharging; and computing the touch position according to a first detection variation value and the second detection variation value.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of electronic equipment, in particular to a touch detection method and a touch device. Background technique [0002] At present, the application range of touch screen has rapidly expanded from the small commercial market such as bank automatic teller machines and industrial computers to mobile phones, PDA (personal digital assistant), GPS (global positioning system), PMP (MP3, MP4, etc.), and even tablet computers. and other mass consumer electronics fields. The touch screen has the advantages of simple, convenient and humanized 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 generally divided into two categories: self-capacitance and mutual capacitance. Such as figure 1 Shown is a structural diagram of a common self-capacitance touch sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F3/041G06F3/045G06F3/044G06F3/0443G06F3/0448
Inventor 李振刚黄臣杨云
Owner BYD SEMICON CO LTD
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