COORDINATE INPUT DEVICE AND MOBILE TERMINAL
First Claim
1. A coordinate input device comprising:
- a signal generation unit that outputs an AC signal;
a first transmission/reception unit comprising a plurality of first antennas that transmit/receive a signal according to the AC signal;
a second transmission/reception unit comprising one or a plurality of second antennas that transmit/receive the signal to/from the first transmission/reception unit; and
a detection unit that, when the first transmission/reception unit transmits/receives the signal, obtains an intensity distribution of the signal corresponding to positions of the plurality of first antennas and detects a detection position according to a position of a peak of the intensity distribution.
1 Assignment
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Accused Products
Abstract
A coordinate input device 100 includes a signal generation unit 1, a transmitting antenna unit 2, a receiving antenna 3, and a detection unit 4. The transmitting antenna unit 2 includes a plurality of antennas that transmits an electromagnetic wave W according to an AC signal. The signal generation unit 1 outputs the AC signal SIG to one of the plurality of antennas of the transmitting antenna unit 2. The receiving antenna 3 receives the electromagnetic wave W from the transmitting antenna unit 2. The detection unit 4 obtains an intensity distribution of the electromagnetic wave W corresponding to the positions of a plurality of antennas based on the electromagnetic wave W received by the receiving antenna 3, and detects a detection position according to the position of a peak in the intensity distribution.
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Citations
20 Claims
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1. A coordinate input device comprising:
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a signal generation unit that outputs an AC signal; a first transmission/reception unit comprising a plurality of first antennas that transmit/receive a signal according to the AC signal; a second transmission/reception unit comprising one or a plurality of second antennas that transmit/receive the signal to/from the first transmission/reception unit; and a detection unit that, when the first transmission/reception unit transmits/receives the signal, obtains an intensity distribution of the signal corresponding to positions of the plurality of first antennas and detects a detection position according to a position of a peak of the intensity distribution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20)
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19. A coordinate input device that detects a position of an electric conductor, comprising:
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a signal generation unit that outputs an AC signal; a first transmission/reception unit comprising a plurality of first antennas that transmit/receive a signal according to the AC signal; one or a plurality of second transmission/reception units comprising second antennas that transmit/receive the signal to/from the first transmission/reception unit; and a detection unit that, when the first transmission/reception unit transmits/receives the signal, obtains an intensity distribution of the signal corresponding to positions of the plurality of first antennas and detects the position of the electric conductor according to a position of a peak of the intensity distribution, the electric conductor being inserted between the plurality of first antennas of the first transmission/reception unit and one or a plurality of second antennas of the second transmission/reception unit.
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Specification