Invention Grant
- Patent Title: Coarse scan and targeted active mode scan for touch and stylus
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Application No.: US14869980Application Date: 2015-09-29
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Publication No.: US10061449B2Publication Date: 2018-08-28
- Inventor: Vivek Pant , Shahrooz Shahparnia , Marduke Yousefpor , Christoph H. Krah
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Morrison & Foerster LLP
- Main IPC: G09G5/00
- IPC: G09G5/00 ; G06F3/044 ; G06F3/041 ; G06F1/32

Abstract:
Power consumption of touch sensing operations for touch sensitive devices can be reduced by implementing a coarse scan (e.g., banked common mode scan) to coarsely detect the presence or absence of an object touching or proximate to a touch sensor panel and the results of the coarse scan can be used to dynamically adjust the operation of the touch sensitive device to perform or not perform a fine scan (e.g., targeted active mode scan). In some examples, the results of the coarse scan can be used to program a touch controller for the next touch sensing frame to idle when no touch event is detected or to perform a fine scan when one or more touch events are detected. In some examples, the results of the coarse scan can be used to abort a scheduled fine scan during the current touch sensing frame when no touch event is detected.
Public/Granted literature
- US20160162101A1 COARSE SCAN AND TARGETED ACTIVE MODE SCAN FOR TOUCH AND STYLUS Public/Granted day:2016-06-09
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