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公开(公告)号：US20240361250A1
公开(公告)日：2024-10-31
申请号：US18644439
申请日：2024-04-24
Applicant: Japan Display Inc.
Inventor： Akihiko FUJISAWA , Takanori TSUNASHIMA , Kaoru ITO , Shiori TEZEN
IPC: G01N21/84
CPC classification number: G01N21/84
Abstract: According to an aspect, a detection device includes: a planar detection device including photodetection elements arranged in a planar configuration; a light source device disposed so as to face the planar detection device; and a light-transmitting placement substrate that is disposed between the planar detection device and the light source device and configured to allow objects to be placed thereon. The planar detection device includes: a detection area where sensor pixels including the photodetection elements are arranged in a first direction and a second direction orthogonal to the first direction; a drive circuit configured to simultaneously supply drive signals to the sensor pixels arranged in the first direction; and a selection circuit configured to select a detection signal for each of the sensor pixels arranged in the second direction. The detection area is divided in the second direction into detection blocks. The drive circuit is provided for each detection block.
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公开(公告)号：US20230326236A1
公开(公告)日：2023-10-12
申请号：US18296666
申请日：2023-04-06
Applicant: Japan Display Inc.
Inventor： Akihiko FUJISAWA , Takaaki KONO
IPC: G06V40/13
CPC classification number: G06V40/1318 , 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.
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公开(公告)号：US20230205345A1
公开(公告)日：2023-06-29
申请号：US18118309
申请日：2023-03-07
Applicant: Japan Display Inc.
Inventor： Akihiko FUJISAWA , Kaoru ITO , Daichi ABE
CPC classification number: G06F3/0412 , G04G21/08 , G06F3/0416 , G06F3/044
Abstract: According to one embodiment, a display device includes a first substrate, a second substrate, a display area, at least one first sensor electrode, a second sensor electrode and a detection circuit. The second substrate is opposed to the first substrate. The display area displays an image. The first sensor electrode is disposed in a peripheral area surrounding the display area. The second sensor electrode is disposed at a position overlapping the first sensor electrode in planar view. The detection circuit is electrically connected to the first sensor electrode. The second sensor electrode is set to a state of being electrically connected to nothing or a state of being biased by resistance of 50 kΩ or greater. The second sensor electrode is larger in area than the first sensor electrode.
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公开(公告)号：US20220187975A1
公开(公告)日：2022-06-16
申请号：US17684627
申请日：2022-03-02
Applicant: Japan Display Inc.
Inventor： Akihiko FUJISAWA , Naoki TAKADA , Kisho YAMAMOTO
Abstract: A detecting device includes a plurality of first electrodes arrayed in a first direction and a second direction intersecting the first direction in a detection region, an electrode drive circuit configured to supply a drive signal to the first electrodes, a detection circuit configured to detect a detection signal received from the first electrodes, and a coupling circuit configured to couple part of the first electrodes to the detection circuit as a detection electrode and couple the first electrodes disposed side by side with the detection electrode in at least the first direction and the second direction to the electrode drive circuit as a drive electrode in a first detection period.
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公开(公告)号：US20220146894A1
公开(公告)日：2022-05-12
申请号：US17521110
申请日：2021-11-08
Applicant: Japan Display Inc.
Inventor： Kaoru ITO , Akihiko FUJISAWA
IPC: G02F1/1362 , G04G21/08 , G06F3/041
Abstract: According to one embodiment, a display device includes a plurality of detection electrodes, a first shield electrode and a second shield electrode. The plurality of detection electrodes are disposed in a peripheral area surrounding a display area configured to display an image. The first shield electrode is disposed on a first substrate and in at least the peripheral area, the first shield electrode having a predetermined fixed potential. The second shield electrode is disposed on a second substrate and in at least the peripheral area, the second shield electrode having the predetermined fixed potential. The first shield electrode and the second shield electrode are disposed, in a plan view, on a side of the display area with respect to each of the detection electrodes.
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Patent Agency Ranking
公开(公告)号：US20180267665A1
公开(公告)日：2018-09-20
申请号：US15895135
申请日：2018-02-13
Applicant: Japan Display Inc.
Inventor： Akihiko FUJISAWA , Daisuke ITO
CPC classification number: G06F3/0416 , G06F3/044 , G06F2203/04101 , G06F2203/04112
Abstract: The display device includes a detection circuit, a touch detection region including a plurality of detection electrodes, a peripheral region around the touch detection region, a plurality of wirings passing the peripheral region from the detection electrodes so as to be connected to the detection circuit, and at least one auxiliary wiring extending parallel to the wirings so as to be connected to the detection circuit.
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公开(公告)号：US20250012713A1
公开(公告)日：2025-01-09
申请号：US18763030
申请日：2024-07-03
Applicant: Japan Display Inc.
Inventor： Kaoru ITO , Akihiko FUJISAWA , Daichi ABE
Abstract: According to an aspect, a detection device includes: a sensor panel having a detection region provided with sensors that are arranged two-dimensionally and each of which is configured to detect light and generates an output corresponding to a degree of detected light; and a light source having point light sources that are arranged in a light emitting region provided corresponding to the detection region. Each point light source is turned on and the outputs from the sensors are received in first detection processing. Each point light source is turned on at a luminance different from the luminance in the first detection processing and the outputs from the sensors are received in second detection processing. The luminance of the point light source in the second detection processing is based on a relation between the luminance of the point light source and the outputs from the sensors in the first detection processing.
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公开(公告)号：US20240134217A1
公开(公告)日：2024-04-25
申请号：US18490130
申请日：2023-10-18
Applicant: Japan Display Inc.
Inventor： Masayuki IKARI , Akihiko FUJISAWA
CPC classification number: G02F1/1309 , G09G3/006
Abstract: A method for inspecting a semiconductor device in which each of a plurality of reflective elements includes a liquid crystal. The method includes the steps of acquiring a first capacitance corresponding to each of the plurality of reflective elements after inputting a first voltage signal to the semiconductor device so that a dielectric constant of the liquid crystal is in a predetermined first state in each of the plurality of reflective elements, acquiring a second capacitance corresponding to each of the plurality of reflective elements after inputting a second voltage signal to the semiconductor device so that a dielectric constant of the liquid crystal is in a predetermined second state in each of the plurality of reflective elements, calculating a difference value between the first capacitance and the second capacitance, and determining whether the difference value is less than or equal to a predetermined threshold value.
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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.
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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.
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