Invention Grant
- Patent Title: Touch sensor panel with multi-power domain chip configuration
-
Application No.: US16179565Application Date: 2018-11-02
-
Publication No.: US10459587B2Publication Date: 2019-10-29
- Inventor: Christoph H. Krah , Christian M. Sauer
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kubota & Basol LLP
- Main IPC: G06F3/044
- IPC: G06F3/044 ; G02F1/1333 ; G02F1/1343 ; G06F3/041

Abstract:
A touch sensing system is disclosed. The touch sensing system includes a guard signal generation chip operating in a first power domain referenced to a first voltage, the guard signal generation chip configured to generate a guard signal. A touch sensing chip operates in a second power domain, different from the first power domain, referenced to the guard signal, the touch sensing chip configured to sense touch at one or more touch electrodes included in a touch sensor panel operating in the second power domain referenced to the guard signal, and the touch sensing chip a different chip than the guard signal generation chip. A voltage regulator is configured to selectively regulate a voltage of the guard signal at the touch sensing chip.
Public/Granted literature
- US20190073061A1 TOUCH SENSOR PANEL WITH MULTI-POWER DOMAIN CHIP CONFIGURATION Public/Granted day:2019-03-07
Information query