Electronic device

Patent metadata

Field	Value
Publication number	US-2024381543-A1
Application number	US-202418782663-A
Country	US
Kind code	A1
Filing date	Jul 24, 2024
Priority date	Feb 10, 2022
Publication date	Nov 14, 2024
Grant date	—

Abstract

An electronic device that includes: an operation panel having a first upper main surface and a first lower main surface that are arranged in a vertical direction such that a part of a body of a user or an operation member is capable of contacting the first upper main surface; a sensor fixed to the first lower main surface and constructed to detect deformation of the operation panel; and an adhesive member fixing the sensor to the first lower main surface. The adhesive member has a Young's modulus of 0.9 MPa to 10 MPa.

First claim

1 . An electronic device comprising:
an operation panel having a first upper main surface and a first lower main surface that are arranged in a vertical direction such that a part of a body of a user or an operation member is capable of contacting the first upper main surface; a sensor fixed to the first lower main surface and constructed to detect deformation of the operation panel; and an adhesive member fixing the sensor to the first lower main surface, wherein the adhesive member has a Young's modulus of 0.9 MPa to 10 MPa.

2 . The electronic device according to claim 1 , further comprising a display panel that has a second upper main surface and a second lower main surface that are arranged in the vertical direction, and is fixed to the first lower main surface of the operation panel.

3 . The electronic device according to claim 1 , wherein a thickness of the adhesive member in the vertical direction is 40 μm to 100 μm.

4 . The electronic device according to claim 3 , further comprising a display panel that has a second upper main surface and a second lower main surface that are arranged in the vertical direction, and is fixed to the first lower main surface of the operation panel.

5 . The electronic device according to claim 1 , further comprising:
a buffer member that has a third upper main surface and a third lower main surface that are arranged in the vertical direction, and is fixed to the first lower main surface of the operation panel; and a plate-shaped member that has a fourth upper main surface and a fourth lower main surface that are arranged in the vertical direction, and is fixed to the first lower main surface of the operation panel.

6 . The electronic device according to claim 1 , wherein the operation panel has a rectangular shape having two long sides extending in a front-rear direction and two short sides extending in a right-left direction as viewed in the vertical direction.

7 . The electronic device according to claim 6 , wherein the sensor is located at a center of the operation panel in the front-rear direction as viewed in the vertical direction.

8 . The electronic device according to claim 1 , wherein the sensor includes a piezoelectric film having a fifth upper main surface and a fifth lower main surface that are arranged in the vertical direction.

9 . The electronic device according to claim 8 , wherein the piezoelectric film is constructed such that a polarity of an electric charge generated by the piezoelectric film when the piezoelectric film is stretched in a right-left direction is different from a polarity of an electric charge generated by the piezoelectric film when the piezoelectric film is stretched in a front-rear direction.

10 . The electronic device according to claim 8 , wherein
the sensor includes a substrate having an upper main surface and a lower main surface that are arranged in the vertical direction, and an adhesive layer fixing the piezoelectric film to the substrate, and the adhesive member, the substrate, the adhesive layer, and the piezoelectric film are arranged in this order on a straight line parallel to the vertical direction.

11 . The electronic device according to claim 10 , wherein a thickness of the adhesive layer in the vertical direction is 10 μm to 100 μm.

12 . The electronic device according to claim 11 , wherein a thickness of the adhesive member in the vertical direction is 40 μm to 100 μm.

13 . The electronic device according to claim 10 , wherein the adhesive layer has a Young's modulus of 0.9 MPa to 10 MPa.

14 . The electronic device according to claim 12 , wherein a thickness of the adhesive layer in the vertical direction is 10 μm to 100 μm.

15 . The electronic device according to claim 14 , wherein a thickness of the adhesive member in the vertical direction is 40 μm to 100 μm.

16 . The electronic device according to claim 1 , wherein the sensor has a longitudinal direction extending in a right-left direction.

17 . The electronic device according to claim 1 , wherein the sensor includes a strain sensor.

18 . The electronic device according to claim 1 , wherein a material of the operation panel is glass.

Assignees

• Murata Manufacturing Co

Inventors

• Kitada Hiroaki
• Kano Hidekazu

Classifications

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• H04M2250/12

  including a sensor for measuring a physical value, e.g. temperature or motion · CPC title

• H04M1/026

  Details of the structure or mounting of specific components · CPC title

• H04M1/0266 Primary

  for a display module assembly · CPC title