TOUCH SENSOR, DISPLAY AND ELECTRONIC UNIT
First Claim
1. A display comprising:
- a plurality of display pixel electrodes;
a plurality of common electrodes arranged to face the display pixel electrodes;
a display layer;
a display control circuit performing image display control based on an image signal so as to activate the display layer by applying a voltage for display between the display pixel electrodes and the common electrodes;
a plurality of touch detection electrodes facing the common electrodes or each arranged side by side with each of the common electrodes to form a capacitance between each of the touch detection electrodes and each of the common electrodes; and
a touch detection circuit detecting an external proximity object based on a detection signal obtained from the touch detection electrodes with use of a common drive voltage for display applied to the common electrodes by the display control circuit as a touch sensor drive signal,wherein the touch detection circuit includes;
an A/D (analog-digital) converter section performing sampling of a detection signal obtained from each of the touch detection electrodes at three or more different sampling frequencies to produce three or more sampling detection signals, anda detection section performing a detection operation based on the three or more sampling detection signals.
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Accused Products
Abstract
A display includes: display pixel electrodes; common electrodes; a display layer; a display control circuit performing image display control based on an image signal; touch detection electrodes each arranged to form a capacitance between each of the touch detection electrodes and each of the common electrodes; and a touch detection circuit detecting an external proximity object based on a detection signal obtained from the touch detection electrodes with use of a common drive voltage for display applied to the common electrodes by the display control circuit as a touch sensor drive signal. The touch detection circuit includes: an A/D (analog-digital) converter section performing sampling of a detection signal obtained from each of the touch detection electrodes at three or more different sampling frequencies to produce three or more sampling detection signals, and a detection section performing a detection operation based on the three or more sampling detection signals.
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Citations
16 Claims
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1. A display comprising:
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a plurality of display pixel electrodes; a plurality of common electrodes arranged to face the display pixel electrodes; a display layer; a display control circuit performing image display control based on an image signal so as to activate the display layer by applying a voltage for display between the display pixel electrodes and the common electrodes; a plurality of touch detection electrodes facing the common electrodes or each arranged side by side with each of the common electrodes to form a capacitance between each of the touch detection electrodes and each of the common electrodes; and a touch detection circuit detecting an external proximity object based on a detection signal obtained from the touch detection electrodes with use of a common drive voltage for display applied to the common electrodes by the display control circuit as a touch sensor drive signal, wherein the touch detection circuit includes; an A/D (analog-digital) converter section performing sampling of a detection signal obtained from each of the touch detection electrodes at three or more different sampling frequencies to produce three or more sampling detection signals, and a detection section performing a detection operation based on the three or more sampling detection signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A touch sensor comprising:
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a plurality of touch drive electrodes; a plurality of touch detection electrodes facing the touch drive electrodes or each arranged side by side with each of the touch drive electrodes to form a capacitance between each of the touch detection electrodes and each of the touch drive electrodes; and a touch detection circuit detecting an external proximity object based on a detection signal obtained from the touch detection electrodes by applying a touch sensor drive signal to the touch drive electrodes, wherein the touch detection circuit includes; an A/D (analog-digital) converter section performing sampling of a detection signal obtained from each of the touch detection electrodes at three or more different sampling frequencies to produce three or more sampling detection signals, and a detection section performing a detection operation based on the three or more sampling detection signals.
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16. An electronic unit having a display with a touch sensor, the display comprising:
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a plurality of display pixel electrodes; a plurality of common electrodes arranged to face the display pixel electrodes; a display layer; a display control circuit performing image display control based on an image signal so as to activate the display layer by applying a voltage for display between the display pixel electrodes and the common electrodes; a plurality of touch detection electrodes facing the common electrodes or each arranged side by side with each of the common electrodes to form a capacitance between each of the touch detection electrodes and each of the common electrodes; and a touch detection circuit detecting an external proximity object based on a detection signal obtained from the touch detection electrodes with use of a common drive voltage for display applied to the common electrodes by the display control circuit as a touch sensor drive signal, wherein the touch detection circuit includes; an A/D (analog-digital) converter section performing sampling of a detection signal obtained from each of the touch detection electrodes at three or more different sampling frequencies to produce three or more sampling detection signals, and a detection section performing a detection operation based on the three or more sampling detection signals.
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Specification