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公开(公告)号：US20250003729A1
公开(公告)日：2025-01-02
申请号：US18738156
申请日：2024-06-10
Applicant: JAPAN DISPLAY INC.
Inventor： Toshinori UEHARA , Fumihoru NAKANO
IPC: G01B7/16
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.
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公开(公告)号：US20220358780A1
公开(公告)日：2022-11-10
申请号：US17725781
申请日：2022-04-21
Applicant: Japan Display Inc.
Inventor： Fumihoru NAKANO
IPC: G06V40/13
Abstract: A detecting device includes a plurality of first electrodes extending in a first direction and a plurality of second electrodes extending in a second direction intersecting the first direction, the first electrodes and the second electrodes being disposed facing each other with an insulating layer interposed therebetween, a first electrode selection circuit configured to supply a first drive signal or a second drive signal with a lower potential than that of the first drive signal to the first electrodes according to a supplied signal of a first code or a second code, and a detection circuit configured to detect capacitance generated between the first electrodes and the second electrodes due to the drive signal.
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公开(公告)号：US20250052626A1
公开(公告)日：2025-02-13
申请号：US18768891
申请日：2024-07-10
Applicant: JAPAN DISPLAY INC.
Inventor： Fumihoru NAKANO , Toshinori UEHARA
Abstract: According to one embodiment, a strain detection device includes a flexible base material, first, second, third, and fourth sensor patterns on the base material, each including a plural strain gauges provided in a row. First strain gauges of the first sensor pattern, second strain gauges of the second sensor pattern, third strain gauges of the third sensor pattern, and fourth strain gauges of the fourth sensor pattern are arranged facing each other in a thickness direction of the base material. The first and fourth strain gauges are arranged symmetrically with a center position of the base material in the thickness direction, and the second and third strain gauges are arranged symmetrically with the center position of the base material in the thickness direction.
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公开(公告)号：US20240264015A1
公开(公告)日：2024-08-08
申请号：US18425674
申请日：2024-01-29
Applicant: Japan Display Inc.
Inventor： Fumihoru NAKANO , Toshinori UEHARA
IPC: G01L1/22
CPC classification number: G01L1/225
Abstract: According to one embodiment, a strain detection device includes a first sensor sheet and a second sensor sheet opposed to the first sensor sheet with a base sandwiched therebetween, and a controller which drives the first sensor sheet and the second sensor sheet. Each of the first sensor sheet and the second sensor sheet includes strain gauges arranged in a row, power supply lines and first signal lines connected to first ends of the strain gauges, and ground lines and second signal lines connected to second ends of the strain gauges. Each of the ground lines of the first sensor sheet is connected to corresponding one of the power supply lines of the second sensor sheet.
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公开(公告)号：US20250164231A1
公开(公告)日：2025-05-22
申请号：US18909522
申请日：2024-10-08
Applicant: Japan Display Inc.
Inventor： Fumihoru NAKANO
IPC: G01B7/293
Abstract: In a detecting device, a second strain gage element of a second strain gage and a third strain gage element of a third strain gage are arranged symmetrically from a position of a center in a thickness direction of a substrate, and are superposed on each other as viewed in plan. A first strain gage element of a first strain gage and a fourth strain gage element of a fourth strain gage are arranged symmetrically from the position of the center in the thickness direction of the substrate, and are superposed on each other as viewed in plan. As viewed in plan, the first strain gage element and the second strain gage element are shifted from each other in a length direction of the substrate. In addition, as viewed in plan, the third strain gage element and the fourth strain gage element are shifted from each other in the length direction of the substrate.
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Patent Agency Ranking
公开(公告)号：US20240328875A1
公开(公告)日：2024-10-03
申请号：US18612397
申请日：2024-03-21
Applicant: Japan Display Inc.
Inventor： Fumihoru NAKANO , Toshinori UEHARA
IPC: G01L1/22
CPC classification number: G01L1/2287 , G01L1/225
Abstract: According to one embodiment, a strain detection device includes a sensor sheet including strain gauges, power lines and first signal lines each connected to one end side of a respective one thereof, and ground lines and second signal lines each connected to an other end side of the respective one thereof, and a controller including a selector which sequentially scan-drives the strain gauges via the power lines and sequentially reads detection signals at the one end side of the respective strain gauges and detection signals at the other end side via the first and second signal lines, an arithmetic processor which calculates a radius of curvature based on the detection signals, and a determination unit which determines whether to stop or continue scan-driving of the strain gauges.
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公开(公告)号：US20240183646A1
公开(公告)日：2024-06-06
申请号：US18528199
申请日：2023-12-04
Applicant: Japan Display Inc.
Inventor： Toshinori UEHARA , Fumihoru NAKANO
IPC: G01B7/16
CPC classification number: G01B7/18
Abstract: An object is to provide a detection device with a reduced number of wires.
A detection device includes a bridge circuit including a first node to which a second end of a first reference resistance element and a first end of a second reference resistance element are connected, a second node to which a second end of the second reference resistance element and a first end of a third reference resistance element are connected, a third node to which a second end of the third reference resistance element and a first end of a strain gauge resistance element are connected, and a fourth node to which a second end of the strain gauge resistance element and a first end of the first reference resistance element are connected, a capacitance element provided between the first node and the third node, a first switch element provided between the fourth node and a reference power supply line, and a second switch element provided between the second node and a detection circuit.-
公开(公告)号：US20230076426A1
公开(公告)日：2023-03-09
申请号：US17900327
申请日：2022-08-31
Applicant: Japan Display Inc.
Inventor： Fumihoru NAKANO , Naoki TAKADA , Takayuki NAKANISHI
Abstract: A sensing device includes a plurality of sensing electrodes arranged in the row and column directions to detect a close object, a plurality of wirings connected to each of the plurality of sensing electrodes, a sensing circuit connected to the plurality of wirings and detecting voltage values of a plurality of sensing electrodes in a plurality of sensing periods and a calculation circuit calculating a position of the close object in proximity using the voltage values detected by the sensing circuit. The sensing circuit uses a set of sensing electrodes adjacent to each other in row and column direction as a sensing unit, sets the plurality of sensing periods consecutively, and changes the sensing electrodes included in the sensing unit to be different by one row in the row direction or one column for each sensing periods.
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公开(公告)号：US20240183723A1
公开(公告)日：2024-06-06
申请号：US18517423
申请日：2023-11-22
Applicant: Japan Display Inc.
Inventor： Toshinori UEHARA , Fumihoru NAKANO
Abstract: Disclosed herein is a detection device including a sensor substrate including strain sensors arranged on a rectangular flexible substrate at fixed intervals in a longitudinal direction. A curvature radius between a pair of adjacent strain sensors is calculated on a value from a preceding strain sensor of the pair of adjacent sensors. When a start point node is defined as a position of a first strain sensor at one end of the strain sensors, a relative position of each of the strain sensors is determined by sequentially adding the relative positions. When the first and second strain sensors overlap, positions of the first and second strain sensors are considered identical on relative space. A position of each strain sensor is corrected based on a difference between a calculated position of the second strain sensor determined by sequentially adding the relative positions and actual position of the second strain sensor.
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公开(公告)号：US20230392960A1
公开(公告)日：2023-12-07
申请号：US18203825
申请日：2023-05-31
Applicant: Japan Display Inc.
Inventor： Fumihoru NAKANO
IPC: G01D5/24
CPC classification number: G01D5/24
Abstract: A detecting device includes a sensor region having a detection region, a plurality of electrodes provided to the detection region, and a detection circuit configured to detect an object to be detected on the detection region frame by frame based on a detected value of each of the electrodes. Length of one frame period for detecting the object to be detected on the detection region differs depending on a relative distance between the sensor region and the object to be detected.
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