TOUCH INPUT DEVICE
First Claim
1. A touch input device comprising:
- a capacitive position detection sensor that includes first and second position detecting conductors;
a press detection sensor that includes a piezoelectric film and first and second press detecting conductors disposed on opposite surfaces of the piezoelectric film;
a press detection circuit configured to generate a press detection voltage signal based on an electric charge output from the press detection sensor; and
a touch detection circuit having an output coupled to the press detection circuit and being configured to generate a touch detection signal by applying a voltage to the position detection sensor and obtaining an electric charge output from the position detection sensor,wherein the position detection sensor and the press detection sensor are positioned with respect to each other, such that the electric charge produced in the press detection sensor by the voltage applied to the position detection sensor is reverse polarity with respect to the electric charge produced in the press detection sensor in response to a pressing force.
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Accused Products
Abstract
A touch input device includes a touch panel, a press detection signal generating unit and a touch detection signal generating unit. The touch panel is formed by laminating a piezoelectric sensor and a capacitive sensor. The piezoelectric sensor is connected to the press detection signal generating unit, and the capacitive sensor is connected to the touch detection signal generating unit. The piezoelectric sensor includes a piezoelectric film, and first and second press detecting conductors disposed with the piezoelectric film sandwiched therebetween. The piezoelectric film is disposed such that a polarity of electric charges produced by a press in the piezoelectric film, and a polarity of excited electric charges produced in the piezoelectric film when the capacitive sensor detects a touch become reverse polarities.
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Citations
17 Claims
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1. A touch input device comprising:
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a capacitive position detection sensor that includes first and second position detecting conductors; a press detection sensor that includes a piezoelectric film and first and second press detecting conductors disposed on opposite surfaces of the piezoelectric film; a press detection circuit configured to generate a press detection voltage signal based on an electric charge output from the press detection sensor; and a touch detection circuit having an output coupled to the press detection circuit and being configured to generate a touch detection signal by applying a voltage to the position detection sensor and obtaining an electric charge output from the position detection sensor, wherein the position detection sensor and the press detection sensor are positioned with respect to each other, such that the electric charge produced in the press detection sensor by the voltage applied to the position detection sensor is reverse polarity with respect to the electric charge produced in the press detection sensor in response to a pressing force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A touch sensor comprising:
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a press detection sensor that includes a piezoelectric film and first and second press detecting conductors disposed on opposite surfaces of the piezoelectric film; and a capacitive position detection sensor that includes a dielectric substrate and first and second position detecting conductors disposed on opposite sides of the dielectric substrate, wherein the press detection sensor and the capacitive position detection sensor are disposed such that the first position detecting conductor and the first press detecting conductor are disposed in the same plane. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification