Invention Grant
- Patent Title: Methods and apparatus for reducing perceived pen-to-ink latency on touchpad devices
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Application No.: US15365620Application Date: 2016-11-30
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Publication No.: US10042469B2Publication Date: 2018-08-07
- Inventor: Bojan Skaljak , Arman Toorians , Michael Chu
- Applicant: NVIDIA Corporation
- Applicant Address: US CA Santa Clara
- Assignee: Nvidia Corporation
- Current Assignee: Nvidia Corporation
- Current Assignee Address: US CA Santa Clara
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06F3/0354 ; G06T1/60 ; G06F3/038

Abstract:
A method for reducing line display latency on a touchpad device is disclosed. The method comprises storing information regarding a plurality of prior touch events on a touch screen of the touchpad device into an event buffer. It further comprises determining an average speed and a predicted direction of motion of a user interaction with the touch screen using the plurality of prior touch events. Next, it comprises calculating a first prediction point using the average speed, the predicted direction, and a last known touch event on the touch screen. Subsequently, it comprises applying weighted filtering on the first prediction point using a measured line curvature to determine a second prediction point. Finally, it comprises rendering a prediction line between the last known touch event on the touch screen and the second prediction point.
Public/Granted literature
- US20170177146A1 METHODS AND APPARATUS FOR REDUCING PERCEIVED PEN-TO-INK LATENCY ON TOUCHPAD DEVICES Public/Granted day:2017-06-22
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