INPUT DEVICE AND METHOD FOR PRODUCING INPUT DEVICE
First Claim
1. An input device comprising at least one sensor circuit which includes a first circuit and a second circuit, the first circuit including a pressure-sensitive sensor whose resistance value continuously changes in accordance with a magnitude of a pressing force, and the second circuit including a fixed resistor and being electrically connected in series to the first circuit, whereina combined resistance value of the second circuit satisfies a following expression (1).
[Expression 1]
Rf=RsHL×
- Co
(1)where, in the above expression (1),Rf is the combined resistance value of the second circuit,RsHL is a combined resistance value of the first circuit when ½
of a maximum working load of the pressure-sensitive sensor is applied, andCo is a resistance correction coefficient within a range of 1/16 to 1/1.
1 Assignment
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Accused Products
Abstract
An input device 1 comprises a sensor circuit 91 which includes a pressure-sensitive sensor 50 and a first fixed resistor 914 which is electrically connected in series to the pressure-sensitive sensor 50. A resistance value Rf of the first fixed resistor 914 satisfies the following expression (1). In the expression (1), RsHL is a resistance value of the pressure-sensitive sensor 50 when ½ of the maximum working load of the pressure-sensitive sensor 50 is applied, and Co is a resistance correction coefficient within the range of 1/16 to 1/1.
Rf=RsHL×Co (1)
12 Citations
15 Claims
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1. An input device comprising at least one sensor circuit which includes a first circuit and a second circuit, the first circuit including a pressure-sensitive sensor whose resistance value continuously changes in accordance with a magnitude of a pressing force, and the second circuit including a fixed resistor and being electrically connected in series to the first circuit, wherein
a combined resistance value of the second circuit satisfies a following expression (1).
[Expression 1]
Rf=RsHL×- Co
(1)where, in the above expression (1), Rf is the combined resistance value of the second circuit, RsHL is a combined resistance value of the first circuit when ½
of a maximum working load of the pressure-sensitive sensor is applied, andCo is a resistance correction coefficient within a range of 1/16 to 1/1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- Co
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9. A method for producing an input device which includes at least one sensor circuit including a first circuit and a second circuit, the first circuit including a pressure-sensitive sensor whose resistance value continuously changes in accordance with a magnitude of a pressing force, and the second circuit including a fixed resistor and being electrically connected to the pressure-sensitive sensor, the method comprising:
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(a) preparing the pressure-sensitive sensor; (b) measuring a combined resistance value RsHL of the first circuit when ½
of a maximum working load of the pressure-sensitive sensor is applied;(c) selecting a resistance correction coefficient Co from a range of 1/16 to 1/1; and (d) making the sensor circuit by preparing the second circuit which has a combined resistance value Rf of a following expression (2).
[Expression 2]
Rf=RsHL×
Co
(2) - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification