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Patent Searching and Data


Title:
TOUCH DETECTION CIRCUIT, TOUCH DISPLAY DEVICE, AND TOUCH DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/215537
Kind Code:
A1
Abstract:
A touch detection circuit, a touch display device, and a touch detection method. The touch detection circuit comprises an operational amplifier, a compensation capacitor, and multiple switches connected to the compensation capacitor. The multiple switches connect or disconnect the electrical connections of the compensation capacitor to an inverting input end, a first bias end, a second bias end, and a third bias end, so as to improve the change sensitivity of capacitance sensing signals. The compensation capacitor comprises a metal oxide semiconductor capacitor. The touch detection circuit can improve the sensitivity, achieve chip miniaturization, and reduce chip costs.

Inventors:
LIU CHENG (CN)
Application Number:
CN2019/101023
Publication Date:
October 29, 2020
Filing Date:
August 16, 2019
Export Citation:
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Assignee:
CHIPONE TECHNOLOGY BEIJING CO LTD (CN)
International Classes:
G06F3/041
Foreign References:
CN108509094A2018-09-07
CN101676828A2010-03-24
CN102541367A2012-07-04
CN104049822A2014-09-17
US20160378252A12016-12-29
Attorney, Agent or Firm:
TOWIN INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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