Invention Grant
- Patent Title: Timing scheme for touch screen supporting variable refresh rate
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Application No.: US14866797Application Date: 2015-09-25
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Publication No.: US09910533B2Publication Date: 2018-03-06
- Inventor: Manu Agarwal , Hopil Bae , Kingsuk Brahma
- 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: G06F3/041
- IPC: G06F3/041 ; G09G3/00 ; G06F3/044

Abstract:
Various timing schemes can be used to synchronizing display functions with touch and/or stylus sensing functions for devices including a variable refresh rate (VRR) display. In a continuous-touch mode, for example, extended blanking can result in frame judder due to mismatch or latency between reporting of sensing data and the display. To minimize these issues, sensing operations can reset to re-synchronize with the display operation, and unreported data from sensing scans can be discarded or ignored. In some examples, a display frame can be divided into two sub-frames, and a system can be configured to perform a touch sensing scan during the first sub-frame of a display frame. At the conclusion of extended blanking, the sensing operations can reset to re-synchronize with the display. The touch sensing scan can be completed in one intra-frame pause and can begin at the start of the display frame.
Public/Granted literature
- US20160370915A1 TIMING SCHEME FOR TOUCH SCREEN SUPPORTING VARIABLE REFRESH RATE Public/Granted day:2016-12-22
Information query