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:
Aug. 06, 2019
Filed:
Oct. 19, 2016
Synaptics Incorporated, San Jose, CA (US);
Kazuya Endo, Tokyo, JP;
Shinobu Nohtomi, Tokyo, JP;
Nobukazu Tanaka, Tokyo, JP;
Tomohiro Hirakawa, Tokyo, JP;
Hiroshi Takeyama, Tokyo, JP;
Takayuki Noto, Tokyo, JP;
Petr Shepelev, Campbell, CA (US);
SYNAPTICS INCORPORATED, San Jose, CA (US);
Abstract
The semiconductor device is intended for connection with an in-cell type display touch panel having a plurality of common electrodes, a reference voltage for display is applied to the common electrodes in a display drive period, and the common electrodes serve as sensor electrodes in a touch detection period. The semiconductor device includes a DC level shift circuit operable to shift the DC level of a toggle signal output by a toggle drive circuit to the reference voltage. The semiconductor device supplies the reference voltage to the common electrodes of the display touch panel in the display drive period, and performs a guarding action in which at least a part of the plurality of common electrodes is supplied with a toggle signal shifted in DC level in the touch detection period.