Invention Grant
- Patent Title: Common electrode driving and compensation for pixelated self-capacitance touch screen
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Application No.: US15687354Application Date: 2017-08-25
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Publication No.: US10534472B2Publication Date: 2020-01-14
- Inventor: Chaohao Wang , Wonjae Choi , Paolo Sacchetto
- 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 ; G06F3/041

Abstract:
A touch screen is disclosed. A plurality of common electrodes can be configured to operate as display circuitry during a display phase, and to operate as touch sensing circuitry during a touch sensing phase. The plurality of common electrodes can include a first common electrode associated with a first display pixel, and a second common electrode associated with a second display pixel. Circuitry can be configured to update the first display pixel at a first time while driving the first common electrode but not the second common electrode, and update the second display pixel at a second time, after the first time, while driving the second common electrode but not the first common electrode. In some examples, the circuitry can be configured to leave the second common electrode floating while driving the first common electrode, and leave the first common electrode floating while driving the second common electrode.
Public/Granted literature
- US20170351378A1 COMMON ELECTRODE DRIVING AND COMPENSATION FOR PIXELATED SELF-CAPACITANCE TOUCH SCREEN Public/Granted day:2017-12-07
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