Nissha Printing Co., Ltd.

Nissha Co., Ltd.

Eiji Kakutani

Junichi Shibata

Yuji Watazu

Keisuke Ozaki

Ryomei Omote

Shuzo Okumura

Yoshiko Suetomi

Naoto Imae

Takao Hashimoto

Katsumi Tokuno

Juichi Murata

Shinichi Hagihara

Problem: To achieve a pressure sensitive sensor capable of suppressing a drop in the accuracy of detecting a pressing force even in cases where the ambient temperature changes. Resolution means: A pressure sensitive sensor () includes: an elastically deformable covering member (A) covering a front surface side; a variable resistance electrode (A), electrical resistance thereof changing in response to a change in posture; a pyroelectric material layer () disposed covering the variable resistance electrode (A); and a pair of charge detection electrodes () disposed on both sides of the pyroelectric material layer () in a layering direction (L).

Pressure sensitive sensor and touch panel

In a pressure detecting apparatus, a pressure sensor includes a piezoelectric sheet that generates a piezoelectric signal according to a load that is applied. A touch detecting unit detects contact with the pressure sensor. An acquirer acquires a piezoelectric output based on the piezoelectric signal. A rate-of-change calculator calculates a rate of change with respect to time of the piezoelectric output acquired within an arbitrary time range before a touch detection time when the touch detecting unit detects contact with the pressure sensor. An applied pressure calculator calculates applied pressure by correcting the piezoelectric output acquired after an end time of the time range used in the calculation of the rate of change using the rate of change. The apparatus enables precise measurement of applied pressure in a pressure sensor.

Pressure detecting apparatus, method of controlling the pressure detecting apparatus, and program

A piezoelectric sensor in which position detection and load detection can be achieved. The piezoelectric sensor includes a piezoelectric layer interposed between the upper electrode and the lower electrode. In the piezoelectric sensor, at least one of the upper electrode and the lower electrode includes a plurality of electrodes patterns.

Piezoelectric sensor and pressure detection apparatus

[Object] To provide a pressure detector capable of accurately detecting a pressing force. [Solution] A pressure detector according to the present invention includes a first piezoelectric sheet, a second piezoelectric sheetlocated so as to be close to or in contact with the first piezoelectric sheet, and a detection electrodethat sandwiches the first piezoelectric sheetand the second piezoelectric sheet. The first piezoelectric sheetand the second piezoelectric sheetare composed of materials having identical characteristics and have a thickness of 5 &#x3bc;m to 50 &#x3bc;m. Potential differences respectively generated between surfaces on a support substrateside and surfaces opposite to the support substrateof the first piezoelectric sheetand the second piezoelectric sheetwhen the first piezoelectric sheetand the second piezoelectric sheetare pulled in an in-plane direction have a relationship expressed by expression 1: V/V&#x3c;0. In expression 1, Vand Vrepresent potential differences respectively generated between the surfaces on the support substrateside and the surfaces opposite to the support substrateof the first piezoelectric sheetand the second piezoelectric sheet

Pressure detector and touch panel provided with pressure detector

A piezoelectric sensor that can perform position detection and load detection. The touch panel having press detection function can detect the pressing load inputted to the pressing surface. An upper electrode, an upper insert member, an intermediate electrode, a lower insert member, and a lower electrode are arranged away from the pressing surface in this order. Among the upper electrode, the intermediate electrode, and the lower electrode, capacitance detection electrodes Cx, Cy for detecting the pressing position, and detection electrodes S for measuring the electric charge according to the pressure when the operation is inputted to the touch panelhaving press detection function are included. One of the upper insert member and the lower insert member is composed of an insulating body, and the other is composed of a piezoelectric body.

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Kyoto, Japan

Eiji Kakutani