Touch sensor, display device, and electronic apparatus
First Claim
1. A touch sensor comprising:
- a sensor electrode having an electrostatic capacitance for touch detection;
a touch detection circuit that performs a detection of a contact or proximity position of an object, on the basis of a detection signal obtained from the sensor electrode by applying a touch sensor drive signal to the sensor electrode,wherein the sensor electrode is split into a plurality of electrode patterns in a stripe shape, and application of the touch sensor drive signal to part of the plurality of electrode patterns causes a drive line to be formed at that time,the touch detection circuit performs the detection on the basis of a first detection signal obtained from a first drive line formed in a first period, and a second detection signal obtained from a second drive line formed in a second period different from the first period, andthe touch detection circuit performs the detection on the basis of a differential signal between the first detection signal and the second detection signal.
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Abstract
A touch sensor includes a sensor electrode having an electrostatic capacitance for touch detection, and a touch detection circuit detecting a contact or proximity position of an object on the basis of a detection signal obtained from the sensor electrode by applying a touch sensor drive signal to the sensor electrode. The sensor electrode is split into plural stripe-like electrode patterns. Applying the touch sensor drive signal to part of the electrode patterns forms a drive line at that time. The touch detection circuit performs a detection on the basis of a first detection signal obtained from a first drive line formed in a first period, and a second detection signal obtained from a second drive line formed in a second period.
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Citations
20 Claims
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1. A touch sensor comprising:
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a sensor electrode having an electrostatic capacitance for touch detection; a touch detection circuit that performs a detection of a contact or proximity position of an object, on the basis of a detection signal obtained from the sensor electrode by applying a touch sensor drive signal to the sensor electrode, wherein the sensor electrode is split into a plurality of electrode patterns in a stripe shape, and application of the touch sensor drive signal to part of the plurality of electrode patterns causes a drive line to be formed at that time, the touch detection circuit performs the detection on the basis of a first detection signal obtained from a first drive line formed in a first period, and a second detection signal obtained from a second drive line formed in a second period different from the first period, and the touch detection circuit performs the detection on the basis of a differential signal between the first detection signal and the second detection signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A display device comprising:
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a plurality of display pixel electrodes; a display function layer having an image display function; a display control circuit that controls image display on the basis of an image signal so as to apply a display drive voltage to the display pixel electrodes and to cause the display function layer to exert the image display function, on the basis of an image signal; a sensor electrode having an electrostatic capacitance for touch detection; and a touch detection circuit that performs a detection of a contact or proximity position of an object, on the basis of a detection signal obtained from the sensor electrode, by using the display drive voltage applied to the sensor electrode by the display control circuit as a touch sensor drive signal, wherein the sensor electrode is split into a plurality of electrode patterns in a stripe shape, and application of the touch sensor drive signal to part of the plurality of electrode patterns causes a drive line to be formed at that time, the touch detection circuit performs the detection on the basis of a first detection signal obtained from a first drive line formed in a first period, and a second detection signal obtained from a second drive line formed in a second period different from the first period, and the touch detection circuit performs the detection on the basis of a differential signal between the first detection signal and the second detection signal. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An electronic apparatus comprising a display device with a touch sensor, the display device including:
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a plurality of display pixel electrodes; a display function layer having an image display function; a display control circuit that controls image display on the basis of an image signal so as to apply a display drive voltage to the display pixel electrodes to cause the display function layer to exert the image display function, on the basis of an image signal; a sensor electrode having an electrostatic capacitance for touch detection; and a touch detection circuit that performs a detection of a contact or proximity position of an object, on the basis of a detection signal obtained from the sensor electrode, by using the display drive voltage applied to the sensor electrode by the display control circuit as a touch sensor drive signal, wherein the sensor electrode is split into a plurality of electrode patterns in a stripe shape, and application of the touch sensor drive signal to part of the plurality of electrode patterns causes a drive line to be formed at that time, the touch detection circuit performs the detection on the basis of a first detection signal obtained from a first drive line formed in a first period, and a second detection signal obtained from a second drive line formed in a second period different from the first period and having a smaller line width than the first drive line, and the touch detection circuit performs the detection on the basis of a differential signal between the first detection signal and the second detection signal. - View Dependent Claims (18, 19, 20)
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Specification