TOUCH DETECTION DEVICE, DISPLAY DEVICE WITH TOUCH DETECTION FUNCTION, AND ELECTRONIC APPARATUS
First Claim
1. A touch detection device comprising:
- a plurality of touch detection electrodes;
a plurality of drive electrodes opposed to the touch detection electrodes and forming capacitance between the drive electrodes and the touch detection electrodes;
an operation drive unit for applying a touch detection drive signal to the drive electrodes during a touch detection operation to detect whether a pointer is in contact with or in proximity to the device; and
a touch detection unit for detecting a touch detection signal appearing on the touch detection electrodes by the touch detection drive signal, whereinwhen the pointer is detected to be in contact with or in proximity to the device during the touch detection operation carried out based on the touch detection signal detected from the touch detection electrodes,the touch detection unit;
derives a signal value based on the touch detection signal at coordinates at which the pointer is in contact with or in proximity to the device and in the vicinity of the coordinates;
derives a three-dimensional waveform which employs a magnitude of the signal value as a height direction;
derives a straight line in the three-dimensional waveform, the straight line connecting between a barycenter based on a volume of a three-dimensional waveform portion equal to or greater than a first threshold value in the height direction and a barycenter based on a volume of a three-dimensional waveform portion equal to or greater than a second threshold value different from the first threshold value in the height direction; and
detects based on the straight line whether the pointer is in contact with or in proximity to the device.
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Accused Products
Abstract
According to an aspect, a display device with a touch detection function, during a touch detection operation, derives a signal value based on the touch detection signal at coordinates at which the pointer is in contact with or in proximity to the device and in the vicinity of the coordinates; derives a three-dimensional waveform which employs a magnitude of the signal value as a height direction; derives a straight line in the three-dimensional waveform, the straight line connecting between a barycenter based on a volume of a three-dimensional waveform portion equal to or greater than a first threshold value in the height direction and a barycenter based on a volume of a three-dimensional waveform portion equal to or greater than a second threshold value in the height direction; and detects based on the straight line whether the pointer is in contact with or in proximity to the device.
33 Citations
13 Claims
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1. A touch detection device comprising:
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a plurality of touch detection electrodes; a plurality of drive electrodes opposed to the touch detection electrodes and forming capacitance between the drive electrodes and the touch detection electrodes; an operation drive unit for applying a touch detection drive signal to the drive electrodes during a touch detection operation to detect whether a pointer is in contact with or in proximity to the device; and a touch detection unit for detecting a touch detection signal appearing on the touch detection electrodes by the touch detection drive signal, wherein when the pointer is detected to be in contact with or in proximity to the device during the touch detection operation carried out based on the touch detection signal detected from the touch detection electrodes, the touch detection unit; derives a signal value based on the touch detection signal at coordinates at which the pointer is in contact with or in proximity to the device and in the vicinity of the coordinates; derives a three-dimensional waveform which employs a magnitude of the signal value as a height direction; derives a straight line in the three-dimensional waveform, the straight line connecting between a barycenter based on a volume of a three-dimensional waveform portion equal to or greater than a first threshold value in the height direction and a barycenter based on a volume of a three-dimensional waveform portion equal to or greater than a second threshold value different from the first threshold value in the height direction; and detects based on the straight line whether the pointer is in contact with or in proximity to the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification