公开(公告)号：US20240102917A1

公开(公告)日：2024-03-28

申请号：US18372516

申请日：2023-09-25

Applicant: Japan Display Inc.

Inventor： Akihiko FUJISAWA ,  Kaoru ITO ,  Kazunori YAMAGUCHI

IPC: G01N21/01

CPC classification number: G01N21/01

Abstract: According to an aspect, a detection device includes: photodiodes that are provided on a substrate; light-emitting elements that are arranged so as to face the photodiodes; and a light-transmitting placement substrate that is disposed between the photodiodes and the light-emitting elements and on which target objects are to be placed. The photodiodes, the placement substrate, and the light-emitting elements are arranged in the order as listed, in a direction orthogonal to the substrate. A light-emitting element of the light-emitting elements corresponding to the photodiode to be detected is controlled to be lit, and another light-emitting element of the light-emitting elements corresponding to the photodiode not to be detected is controlled to be unlit. The photodiodes to be detected output sensor values based on light from the lit-up light-emitting elements. The light-emitting elements adjacent to the lit-up light-emitting elements at least in row and column directions are controlled to be unlit.

公开(公告)号：US20230289002A1

公开(公告)日：2023-09-14

申请号：US18119561

申请日：2023-03-09

Applicant: Japan Display Inc.

Inventor： Daichi ABE ,  Akihiko FUJISAWA

IPC: G06F3/041 ,  G02F1/1362

CPC classification number: G06F3/0412 ,  G02F1/136218 ,  G06F2203/04101

Abstract: According to one embodiment, a display device includes a display area for displaying an image, a plurality of detection electrodes and a movable electrode. The plurality of detection electrodes are disposed in a peripheral area surrounding the display area. The movable electrode is disposed in such a way as to surround the detection electrodes and is movable around the detection electrodes. The movable electrode has a length corresponding to a length of each of the detection electrodes in a peripheral direction.

公开(公告)号：US20230017680A1

公开(公告)日：2023-01-19

申请号：US17947398

申请日：2022-09-19

Applicant: Japan Display Inc.

Inventor： Akihiko FUJISAWA ,  Kaoru ITO ,  Tsutomu HARADA ,  Takayuki NAKANISHI

IPC: G06F3/044 ,  G06F3/041 ,  G04G21/08

Abstract: According to one embodiment, a display device includes a display panel and a ring-shaped electrode. The display panel includes a display area for displaying an image, a plurality of first electrodes arranged to surround the display area, and at least one second electrode arranged to surround the plurality of first electrodes. The ring-shaped electrode is arranged on the display panel and is arranged at a position overlapping with the second electrode in planar view. The ring-shaped electrode includes a protruding portion overlapping with at least one of the plurality of first electrodes in planar view.

公开(公告)号：US20220229531A1

公开(公告)日：2022-07-21

申请号：US17714250

申请日：2022-04-06

Applicant: Japan Display Inc.

Inventor： Akihiko FUJISAWA

IPC: G06F3/041 ,  G09G3/36 ,  G06F3/044 ,  G04G21/08

Abstract: According to one embodiment, a display device includes a display part, a plurality of sensor electrodes and a controller. The display part is configured to display an image. The plurality of sensor electrodes are arranged to surround the display part. The controller is electrically connected to the sensor electrodes, and is configured to detect an object close to or contacting the sensor electrodes. The controller drives at least one of the sensor electrodes as a detection electrode and drives at least one of the sensor electrodes as a drive electrode.

公开(公告)号：US20210103361A1

公开(公告)日：2021-04-08

申请号：US17061959

申请日：2020-10-02

Applicant: Japan Display Inc.

Inventor： Akihiko FUJISAWA ,  Teppei YAMADA ,  Kaoru ITO

IPC: G06F3/044 ,  G06F3/041

Abstract: A technology that can make the touch detection results at corner portions proper is proposed. A display device includes a display panel, a sensor substrate formed on the display panel, and plural drive electrodes and plural detection electrodes extended in a direction so as to intersect with the plural drive electrodes on the sensor substrate. Among the plural drive electrodes, any of the lengths of N first drive electrodes (where N represents the number), which are continuously adjacent to one another, is shorter than any of the lengths of the other drive electrodes. An area where at least one drive electrode among the N first drive electrodes and at least one detection electrode overlap each other is larger than the area of an intersectional portion where any of the other drive electrodes and any of the other detection electrodes overlap each other.

公开(公告)号：US20250148824A1

公开(公告)日：2025-05-08

申请号：US19013266

申请日：2025-01-08

Applicant: Japan Display Inc.

Inventor： Akihiko FUJISAWA ,  Takaaki KONO

IPC: G06V40/13 ,  H10K39/32

Abstract: A detection device includes a sensor circuit provided with a first photodiode in a semiconductor layer, and a signal detector configured to acquire a detection value corresponding to a signal output from the sensor circuit. The signal detector includes a first detection circuit coupled to one end of the first photodiode, a first switch circuit configured to apply a power supply potential to another end of the first photodiode, and a second switch circuit configured to short both ends of the first photodiode.

公开(公告)号：US20240397219A1

公开(公告)日：2024-11-28

申请号：US18672934

申请日：2024-05-23

Applicant: Japan Display Inc.

Inventor： Akihiko FUJISAWA ,  Kaoru ITO ,  Daichi ABE

IPC: H04N25/47 ,  H04N23/56 ,  H04N25/60 ,  H04N25/78

Abstract: A detection device includes a planar detection device comprising a plurality of photodetection elements arranged in a planar configuration, a light source device disposed so as to face the planar detection device, and a light-transmitting mounting substrate that is disposed between the planar detection device and the light source device and configured to mount a plurality of objects to be detected.

公开(公告)号：US20230169788A1

公开(公告)日：2023-06-01

申请号：US17992048

申请日：2022-11-22

Applicant: Japan Display Inc.

Inventor： Takaaki KONO ,  Akihiko FUJISAWA

IPC: G06V40/13 ,  G06V10/145 ,  H04N25/78

CPC classification number: G06V40/1318 ,  G06V40/1329 ,  G06V10/145 ,  H04N25/78

Abstract: A detection device includes a sensor area provided with a plurality of detection elements each comprising a photoelectric conversion element in a detection area, and a detector configured to detect a potential difference between a voltage generated in a first detection element and a voltage generated in a second detection element adjacent to the first detection element in the detection area.

公开(公告)号：US20230088935A1

公开(公告)日：2023-03-23

申请号：US17989851

申请日：2022-11-18

Applicant: Japan Display Inc.

Inventor： Kaoru ITO ,  Akihiko FUJISAWA

IPC: G06F3/041 ,  G06F3/044

Abstract: A liquid crystal display device includes a liquid crystal layer provided between a first substrate and a second substrate, a detection electrode configured to detect an external proximity object, a plurality of pixels overlapping the detection electrode in plan view, and a detection circuit configured to detect a detected capacitance value generated in the detection electrode. A liquid crystal capacitance value generated between each of the pixels and the detection electrode includes a first capacitance value at a first gradation and a second capacitance value at a second gradation smaller than the first gradation, and the detection circuit corrects the detected capacitance value based on a ratio between number of pixels with the first gradation and number of pixels with the second gradation out of the pixels.

公开(公告)号：US20220236835A1

公开(公告)日：2022-07-28

申请号：US17579708

申请日：2022-01-20

Applicant: Japan Display Inc.

Inventor： Kaoru ITO ,  Akihiko FUJISAWA

IPC: G06F3/044 ,  G02F1/1339 ,  G02F1/1333

Abstract: According to one embodiment, a display device includes a first substrate, a second substrate, a sealant, a first electrode, an insulating film and a second electrode. The sealant bonds the first substrate and the second substrate and is provided in a peripheral area surrounding a display area. The first electrode is provided on the first substrate in the peripheral area. The insulating film covers the first electrode. The second electrode is provided on the second substrate in the peripheral area. The sealant contains a conductive member. At least one of the first electrode and the second electrode includes a plurality of fine line portions in an area where the first electrode, the insulating film, the sealant, and the second electrode are overlapped in planar view.