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:
Jun. 07, 2016
Filed:
Jan. 29, 2014
Synaptics Display Devices Gk, Tokyo, JP;
Kazuhiro Okamura, Tokyo, JP;
Shigeru Ota, Tokyo, JP;
Synaptics Display Devices GK, Tokyo, JP;
Abstract
A semiconductor device including a display driving circuit that drives a display panel, a touch detection signal driving circuit that applies a touch detection signal to a touch sensor, and a touch state detection circuit that receives a signal obtained by observing the touch sensor is configured as follows. A connection switching circuit that switches connection between a terminal and an internal circuit is included therein. The connection switching circuit switches connection with the terminal by selecting one of at least two of the display driving circuit, the touch detection signal driving circuit and the touch state detection circuit. A protection circuit which is capable of changing a protection voltage level is connected to the terminal, and the protection voltage level varies depending on the signal amplitude of the circuit selected by the connection switching circuit.