SENSOR MODULE AND DISPLAY DEVICE
First Claim
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1. A sensor module comprising:
- a first sensor circuit comprising a first detection electrode whose detection capacitance varies according to an input operation by an input unit after a first precharge voltage is applied to the first detection electrode, a first amplifier formed of a thin-film transistor including a gate electrode connected to the first detection electrode and configured to adjust a first coupling signal supplied to a source electrode according to an attenuation amount of the first precharge voltage on the first detection electrode and output an adjusted first coupling signal from a drain electrode, and a first coupling capacitor connected between the source electrode and gate electrode of the first amplifier;
a second sensor circuit comprising a second detection electrode whose detection capacitance varies according to an input operation by the input unit after a second precharge voltage is applied to the second detection electrode, a second amplifier formed of a thin-film transistor including a gate electrode connected to the second detection electrode and configured to adjust a second coupling signal supplied to a source electrode according to an attenuation amount of the second precharge voltage on the second detection electrode and output an adjusted second coupling signal from a drain electrode, and a second coupling capacitor connected between the source electrode and gate electrode of the second amplifier; and
a differential circuit connected to the drain electrode of the first amplifier and the drain electrode of the second amplifier.
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Abstract
According to one embodiment, a sensor module includes a first sensor circuit, a second sensor circuit and a differential circuit. The first sensor circuit includes a first detection electrode, a first amplifier formed of a thin-film transistor and a first coupling capacitor. The second sensor circuit includes a second detection electrode, a second amplifier formed of a thin-film transistor and a second coupling capacitor. The differential circuit is connected to the drain electrode of the first amplifier and the drain electrode of the second amplifier.
5 Citations
9 Claims
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1. A sensor module comprising:
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a first sensor circuit comprising a first detection electrode whose detection capacitance varies according to an input operation by an input unit after a first precharge voltage is applied to the first detection electrode, a first amplifier formed of a thin-film transistor including a gate electrode connected to the first detection electrode and configured to adjust a first coupling signal supplied to a source electrode according to an attenuation amount of the first precharge voltage on the first detection electrode and output an adjusted first coupling signal from a drain electrode, and a first coupling capacitor connected between the source electrode and gate electrode of the first amplifier; a second sensor circuit comprising a second detection electrode whose detection capacitance varies according to an input operation by the input unit after a second precharge voltage is applied to the second detection electrode, a second amplifier formed of a thin-film transistor including a gate electrode connected to the second detection electrode and configured to adjust a second coupling signal supplied to a source electrode according to an attenuation amount of the second precharge voltage on the second detection electrode and output an adjusted second coupling signal from a drain electrode, and a second coupling capacitor connected between the source electrode and gate electrode of the second amplifier; and a differential circuit connected to the drain electrode of the first amplifier and the drain electrode of the second amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A display device comprising:
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a display panel comprising an array substrate including a plurality of wirings and a plurality of pixels; and a sensor module comprising first and second sensor circuits arranged on the array substrate, and a differential circuit, wherein the first sensor circuit comprises a first detection electrode whose detection capacitance varies according to an input operation by an input unit after a first precharge voltage is applied to the first detection electrode, a first amplifier formed of a thin-film transistor including a gate electrode connected to the first detection electrode and configured to adjust a first coupling signal supplied to a source electrode according to an attenuation amount of the first precharge voltage on the first detection electrode and output an adjusted first coupling signal from a drain electrode, and a first coupling capacitor connected between the source electrode and gate electrode of the first amplifier, the second sensor circuit comprises a second detection electrode whose detection capacitance varies according to an input operation by the input unit after a second precharge voltage is applied to the second detection electrode, a second amplifier formed of a thin-film transistor including a gate electrode connected to the second detection electrode and configured to adjust a second coupling signal supplied to a source electrode according to an attenuation amount of the second precharge voltage on the second detection electrode and output an adjusted second coupling signal from a drain electrode, and a second coupling capacitor connected between the source electrode and gate electrode of the second amplifier, and the differential circuit is connected to the drain electrode of the first amplifier and the drain electrode of the second amplifier. - View Dependent Claims (9)
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Specification