Touch-screen input/output device touch sensing techniques
First Claim
1. A method comprising:
- scanning out frames of pixel data to a display during trace intervals;
extending a vertical blanking interval to create an extended vertical blanking interval; and
scanning a touch sensor array during said extended vertical blanking interval between the frames of pixel data.
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Abstract
A touch-screen input/output device including a touch sensor, a display, a display control module, a touch sensor control module and a synchronizer module. The touch sensor is overlaid on a display. The display control module is communicatively coupled to the display and converts video data into a serial bit stream video display signal include one or more blanking intervals. The touch sensor control module is communicatively coupled to the touch sensor and determines touch events and location of the touch event on the touch sensor during one or more touch sensor scan cycles. The synchronizer module is communicatively coupled between the display control module and the touch sensor control module, and interleaves the one or more touch sensor scan cycles with the one or more blanking intervals of the video display signal.
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Citations
15 Claims
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1. A method comprising:
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scanning out frames of pixel data to a display during trace intervals; extending a vertical blanking interval to create an extended vertical blanking interval; and scanning a touch sensor array during said extended vertical blanking interval between the frames of pixel data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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scanning out lines of a frame of pixel data; and scanning each of a plurality of portions of a touch sensor array during a corresponding horizontal blanking interval between lines of the frame of pixel data, wherein the horizontal blanking interval is extended to enable scanning the touch sensor array between line trace intervals. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method comprising:
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scanning out frames of pixel data to a display during trace intervals, and scanning a touch sensor array during blanking intervals of the frames of pixel data, wherein an entire touch sensor array scan for one cycle is performed during vertical blanking intervals and each of a plurality of portions of the touch sensor array scan for another cycle is performed during corresponding horizontal blanking intervals between vertical blanking intervals.
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Specification