Strain detection device

Patent metadata

Field	Value
Publication number	US-2025003729-A1
Application number	US-202418738156-A
Country	US
Kind code	A1
Filing date	Jun 10, 2024
Priority date	Jun 29, 2023
Publication date	Jan 2, 2025
Grant date	—

Abstract

According to one embodiment, a strain detection device includes a sheet base material, a plurality of strain gauges arranged in a first direction on the sheet base material, a plurality of power supply lines and a plurality of first signal lines each connected to one end of a respective one of the plurality of strain gauges, and a plurality of ground lines and a plurality of second signal lines each connected to an other end of a respective one of the plurality of strain gauges, and a dummy pattern provided on the sheet base material and located between two of the plurality of strain gauges adjacent to each other in the first direction.

First claim

What is claimed is:

1 . A strain detection device comprising:
a sheet base material; a plurality of strain gauges arranged in a first direction and provided on the sheet base material; a plurality of power supply lines and a plurality of first signal lines each connected to a first end of a respective one of the plurality of strain gauges, and a plurality of ground lines and a plurality of second signal lines each connected to a second end of a respective one of the plurality of strain gauges; and a dummy pattern provided on the sheet base material and located between two of the plurality of strain gauges, the two being adjacent to each other in the first direction.

2 . The strain detection device of claim 1 , wherein
the dummy pattern includes a plurality of dummy lines each extending in the first direction and arranged in a second direction intersecting the first direction.

3 . The strain detection device of claim 2 , wherein
the plurality of strain gauges are arranged to be spaced apart from each other in the first direction, each of the strain gauges includes a base line extending in the second direction and a plurality of waveform lines each having a protruding part protruding from the base line toward a first side of the base line in the first direction, and the plurality of dummy lines are arranged approximately in alignment with the plurality of waveform lines of the strain gages.

4 . The strain detection device of claim 3 , wherein
the plurality of dummy lines include a plurality of first lines connecting to a plurality of waveform lines of one of an adjacent pair of the strain gauges and a plurality of second lines connected to a plurality of waveform lines of an other one of the strain gauges, and the plurality of first lines and the plurality of second lines are arranged alternately in the second direction.

5 . The strain detection device of claim 4 , wherein
at least one of the plurality of first lines and at least one of the plurality of second lines are divided into a plurality of portions in the first direction, and at least one of the portions faces one of the first lines or one of the second lines in the second direction.

6 . The strain detection device of claim 5 , wherein
each of the strain gauges includes a plurality of second waveform lines each having a second protruding part protruding from the base line toward a second side of the base line in the first direction, the second side being opposite to the first side, and the dummy lines include a wavy dummy line extending in the second direction continuously in a wave-like manner.

7 . The strain detection device of claim 1 , further comprising a second dummy pattern on the sheet base material,
wherein the second dummy pattern is disposed in an area where the plurality of strain gauges, the plurality of dummy patterns, the plurality of power supply lines, the ground lines, and the first and second signal lines are not provided.

8 . The strain detection device of claim 7 , wherein
the second dummy pattern is disposed between each respective pair of the strain gages adjacent to each other in the first direction, and further comprises a plurality of second dummy lines provided between one of the respective pair of the strain gages and one of the first signal line, and between the one of the respective pair of the strain gages and a respective one of the ground lines.

9 . A strain detection device comprising:
a sheet base material; a plurality of strain gauges arranged in a first direction and provided on the sheet base material; and a plurality of power supply lines and a plurality of first signal lines each connected to a first end of the plurality of strain gauges, and a plurality of ground lines and a plurality of second signal lines each connected to a second end of the plurality of strain gauges, each of the strain gauges including a base line, a plurality of first waveform lines each having a first protruding part protruding from the base line toward a first side of the base line in the first direction, and a plurality of second waveform lines each having a second protruding part protruding from the base line toward a second side of the base line in the first direction, the second side being opposite to the first side, the strain gages includes a first strain gage and a second strain gage that is adjacent the first strain gage in the first direction, and a respective one of the first waveform lines of the first strain gage and a respective one of the second waveform lines of the second strain gage are arranged in the second direction.

10 . The strain detection device of claim 9 , further comprising a dummy wiring pattern on the sheet base material,
wherein the second dummy pattern is disposed in an area where the plurality of strain gauges, the plurality of dummy patterns, the plurality of power supply lines, the ground lines, and the first and second signal lines are not provided.

11 . The strain detection device of claim 10 , wherein
the dummy wiring pattern is disposed between each respective pair of the strain gages adjacent to each other in the first direction, and further comprises a plurality of dummy wiring lines provided between one of the respective pair of the strain gages and one of the first signal line, and between the one of the respective pair of the strain gages and a respective one of the ground lines.

Assignees

• Japan Display Inc

Inventors

• Uehara Toshinori
• Nakano Fumihoru

Classifications

• G01B7/18 Primary

  using change in resistance · CPC title