The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2024
Filed:
Sep. 14, 2021
Huawei Technologies Co., Ltd., Shenzhen, CN;
Zhengyuan Hu, Xi'an, CN;
Fengxin Wang, Xi'an, CN;
Jian Shen, Hangzhou, CN;
Nanxue Gong, Shenzhen, CN;
Huawei Technologies Co., Ltd., Shenzhen, CN;
Abstract
A touch detection drive circuit in an electronic device inputs a touch excitation signal to a touch electrode, and receives a detection signal of the touch electrode. An isolation power supply circuit: receives the touch excitation signal and a primary power supply voltage; based on the touch excitation signal in a non-touch detection phase, short-circuits a first reference ground and a second reference ground, stores the primary power supply voltage, and transmits the primary power supply voltage to the touch detection drive circuit; and in a touch detection phase, disconnects the first reference ground from the second reference ground and discharges to the touch detection drive circuit.