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Mutual-capacitance touch apparatus and highly sensitive mutual-capacitance touch sensing method for the same

一种互电容触控、感测方法的技术，应用在电路、电气元件、非线性光学等方向，能够解决出线少等问题

Active Publication Date: 2018-11-13
SUPERC TOUCH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, immediately after the touch electrode is embedded in the panel structure, the touch electrode is too close to the common voltage electrode of the liquid crystal panel or the common cathode or common anode of the OLED panel, and faces the dilemma of huge background stray capacitance; resulting in fewer outgoing lines and easy multi-point detection. Mutual-capacitance touch with the advantages of simple measurement and circuit is almost useless

Method used

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  • Mutual-capacitance touch apparatus and highly sensitive mutual-capacitance touch sensing method for the same
  • Mutual-capacitance touch apparatus and highly sensitive mutual-capacitance touch sensing method for the same
  • Mutual-capacitance touch apparatus and highly sensitive mutual-capacitance touch sensing method for the same

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Embodiment Construction

[0023] Existing relevant technical content and detailed description of the present invention, cooperate drawing description as follows:

[0024] See Figures 1A-1D As shown, it is a schematic diagram illustrating a known mutual-capacitance touch sensing, wherein a user's finger has not touched a mutual-capacitance touch device. Such as Figure 1A As shown, the mutual capacitance touch device includes a touch receiving circuit 140, a touch transmitting signal generating circuit 145, a plurality of first touch electrodes (also called touch transmitting electrodes, for example, a touch transmitting electrode TX), a plurality of second touch electrodes (also called touch sensing electrodes, such as a touch sensing electrode RX shown in the figure), and a conductor around the second touch electrodes, such as a conductive casing or a display The common electrode layer 106 of the screen (for example, it can be the common electrode of the liquid crystal panel or the common cathode o...

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Abstract

A mutual-capacitance touch apparatus and highly sensitive mutual-capacitance touch sensing method thereof are disclosed. The method includes: providing a touch apparatus including: a plurality of first touch electrodes and a plurality of second touch electrodes, a touch controller including a touch driving signal generator, a touch receiver, and an amplifier with gain larger than zero. The touch controller sequentially or randomly applies a touch driving signal to a selected first touch electrode, and senses a touch sensing signal at a second touch electrode by the touch receiver, and processes the touch sensing signal by the amplifier with gain larger than zero, then outputs the processed touch sensing signal to at least a conductor close to the second touch electrode.

Description

technical field [0001] The present invention relates to a touch device and a touch sensing method thereof, in particular to a mutual capacitance touch display device and a mutual capacitance touch sensing method with high sensing sensitivity. Background technique [0002] Following the end of the bulky cathode ray tube display era, flat-panel displays such as liquid crystal displays, plasma displays and organic light-emitting diode displays are competing for glory. The rise of mobile devices drives the trend of touch display panels; lighter and thinner is a common trend in the development of mobile electronic devices, so the in-cell touch display panel has quickly become a new favorite. However, immediately after the touch electrode is embedded in the panel structure, the touch electrode is too close to the common voltage electrode of the liquid crystal panel or the common cathode or common anode of the OLED panel, and faces the dilemma of huge background stray capacitance; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G06F3/044G02F1/1333
CPCG02F1/13338G06F3/0412G06F3/0416G06F3/044G06F3/0418G06F3/0446G06F3/0443H10K59/40H10K59/1213G06F2203/04107
Inventor 李祥宇金上林丙村杜佳勋
Owner SUPERC TOUCH CORP