TOUCH SCREEN AND RELATED TOUCH SENSING CONTROL CIRCUIT
First Claim
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1. A touch screen, comprising:
- a display device having a pixel array, comprising;
a plurality of data lines, arranged for driving the pixel array; and
a common electrode layer, having a plurality of openings, arranged for providing a common voltage to the pixel array; and
a touch sensing control circuit, coupled to the common electrode layer and a plurality of first data lines of the plurality of data lines, arranged for generating a first touch driving signal and applying the first touch driving signal to the plurality of first data lines; and
detecting a plurality of touch sensing signals respectively from a plurality of common electrodes of the common electrode layer when the first touch driving signal is applied to one of the first data lines.
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Abstract
Disclosed herein are touch screens that integrate touch sensing systems with display devices. The touch sensing system serves data lines and common electrodes of a driving circuitry of the display device as touch driving lines and touch sensing lines for touch sensing operations. A common electrode layer having the common electrodes of the driving circuitry includes a plurality of openings for reducing a base mutual-capacitance of the touch sensing system.
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Citations
15 Claims
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1. A touch screen, comprising:
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a display device having a pixel array, comprising; a plurality of data lines, arranged for driving the pixel array; and a common electrode layer, having a plurality of openings, arranged for providing a common voltage to the pixel array; and a touch sensing control circuit, coupled to the common electrode layer and a plurality of first data lines of the plurality of data lines, arranged for generating a first touch driving signal and applying the first touch driving signal to the plurality of first data lines; and
detecting a plurality of touch sensing signals respectively from a plurality of common electrodes of the common electrode layer when the first touch driving signal is applied to one of the first data lines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A touch sensing control circuit, comprising:
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a signal generation circuit, coupled to a plurality of data lines of a display device, for generating a first touch driving signal, and applying the first touch driving to a plurality of first data lines of the data lines; and a detection circuit, coupled a plurality of common electrodes of the display device, for detecting a plurality of touch sensing signals from the common electrodes when the first touch driving signal is applied to one of the first data lines. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification