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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：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：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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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：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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Patent Agency Ranking
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
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.
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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
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.
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公开(公告)号：US20240414827A1
公开(公告)日：2024-12-12
申请号：US18735991
申请日：2024-06-06
Applicant: Japan Display Inc.
Inventor： Kaoru ITO , Akihiko FUJISAWA , Daichi ABE
Abstract: A detection apparatus includes a sensor, a detection circuit, and a light source configured to emit light in a first color, a second color, and a third color. The detection circuit acquires a first output, a second output, and a third output that are outputs of the sensor corresponding to a period when the light in the first color is emitted, a period when the light in the second color is emitted, and a period when the light in the third color is emitted, respectively. The detection circuit adjusts at least two or more of the first, second, and third outputs based on adjustment coefficients derived so as to equalize a fourth output, a fifth output, and a sixth output. The fourth, fifth, and sixth outputs are outputs obtained when the sensor is directly irradiated with the light in the first, second, and third colors from the light source, respectively.
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公开(公告)号：US20230305500A1
公开(公告)日：2023-09-28
申请号：US18124117
申请日：2023-03-21
Applicant: Japan Display Inc.
Inventor： Kaoru ITO , Akihiko FUJISAWA , Daichi ABE
CPC classification number: G04G21/08 , G06F3/04164 , G06F3/041662 , G06F3/0443 , G06F3/0412
Abstract: According to one embodiment, a display device includes a display area, a peripheral area and a plurality of detection electrodes. The display area includes a display element. The peripheral area surrounds the display area. The plurality of detection electrodes are arranged in the peripheral area. The plurality of detection electrodes are each electrically connected to at least one other detection electrode that is not adjacent thereto.
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公开(公告)号：US20210303124A1
公开(公告)日：2021-09-30
申请号：US17217058
申请日：2021-03-30
Applicant: Japan Display Inc.
Inventor： Akihiko FUJISAWA , Daichi ABE , Kaoru ITO
Abstract: A technology which can improve the accuracy of touch detection is proposed. A display device includes: a touch panel including plural drive electrodes and plural detection electrodes; plural peripheral wirings; and plural switching elements each of which is disposed between a detection electrode and the corresponding peripheral wiring and that is connected to the detection electrode and the corresponding peripheral electrode. The touch panel executes detection by means of a mutual detection scheme using the plural drive electrodes and the plural detection electrodes. In a condition in which a predefined voltage is applied to the peripheral wirings when the plural switching elements are in an off-state, the voltages of the drive electrodes are changed, and subsequently a condition in which the changes of the voltages of the drive electrodes can be detected from the peripheral wirings is set, and the switching elements are turned from off to on.
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