Invention Grant
- Patent Title: Concurrent touch and negative pixel scan
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Application No.: US15666169Application Date: 2017-08-01
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Publication No.: US10402025B2Publication Date: 2019-09-03
- Inventor: Christoph H. Krah , Marduke Yousefpor
- 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 concurrent touch and negative pixel scan performed at a touch panel is disclosed. The concurrent scan can include sensing an object proximate to the touch panel and sensing a negative pixel effect, based the object's grounding condition, at the touch panel, at the same time. As a result, sense signals indicative of the proximity of the object and coupling signals indicative of the negative pixel effect's magnitude can be captured concurrently. Because the negative pixel effect can cause errors or distortions in the sense signals, the coupling signals can be used to compensate the sense signals for the negative pixel effect.
Public/Granted literature
- US20170329441A1 CONCURRENT TOUCH AND NEGATIVE PIXEL SCAN Public/Granted day:2017-11-16
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