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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：US20250012631A1
公开(公告)日：2025-01-09
申请号：US18761798
申请日：2024-07-02
Applicant: Japan Display Inc.
Inventor： Kaoru ITO , Akihiko FUJISAWA , Daichi ABE
Abstract: According to an aspect, a detection device includes: sensors each of which includes a photodiode configured to detect light and is configured to generate an output corresponding to a degree of the detected light; and a detection circuit configured to receive the output of each sensor. The photodiode has an anode to which a reference potential is applied and a cathode to which a reset potential higher than the reference potential is applied. Each sensor is configured to generate the output corresponding to the degree of the light detected by the photodiode after the reset potential is applied to the cathode and before the reset potential is applied to the cathode again. The outputs of the sensors are received in a first period and a second period after the first period. The reference potential and the reset potential in the first period are different from those in the second period.
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公开(公告)号：US20240395832A1
公开(公告)日：2024-11-28
申请号：US18671231
申请日：2024-05-22
Applicant: Japan Display Inc.
Inventor： Akihiko FUJISAWA , Kaoru ITO , Daichi ABE , Tomoyuki ISHIHARA
IPC: H01L27/146 , H01L27/15
Abstract: A detection device includes a planar detection device includes 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 on which a plurality of objects to be detected are mounted, the light-transmitting mounting substrate being disposed between the planar detection device and the light source device.
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Patent Agency Ranking
公开(公告)号：US20240328855A1
公开(公告)日：2024-10-03
申请号：US18603479
申请日：2024-03-13
Applicant: Japan Display Inc.
Inventor： Kaoru ITO , Akihiko FUJISAWA , Daichi ABE
CPC classification number: G01J1/44 , G01J1/08 , G01J2001/446 , G01J2001/448
Abstract: According to an aspect, a detection device includes: a planar detection device including photodetection elements; point light sources provided correspondingly to the photodetection elements; a light directivity control element disposed between the point light sources and the photodetection elements; and a detection circuit electrically coupled to the photodetection elements. Each point light source corresponds to at least one of the photodetection elements. In a light amount setting mode, the point light sources are lit up at different light amounts; the photodetection elements output sensor values corresponding to the different light amounts; the sensor values that are detected are compared with a preset target sensor value; and light amounts for detection of the point light sources are set. In a detection mode, the point light sources are lit up at the set light amounts for detection; and the photodetection elements output sensor values corresponding to the light amounts for detection.
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公开(公告)号：US20240323543A1
公开(公告)日：2024-09-26
申请号：US18607801
申请日：2024-03-18
Applicant: Japan Display Inc.
Inventor： Tomoyuki ISHIHARA , Tomoya TEZEN , Daisuke HAMANO , Naoyuki ASANO , Kaoru ITO , Akihiko FUJISAWA
CPC classification number: H04N23/72 , H01L27/14645 , H04N5/2628 , H04N5/265 , H04N23/71 , H04N23/74 , H04N23/76
Abstract: According to an aspect, a detection device includes: a planar detection device including photodetection elements arranged in a planar configuration; a light-transmitting placement substrate to place thereon objects to be detected; and light sources provided correspondingly to the photodetection elements. The planar detection device, the placement substrate, and the light sources are arranged in the order as listed. The light sources include first light sources that are separately arranged and second light sources that are arranged adjacent to the respective first light sources. The detection device has: a first period in which the first light sources are on and the second light sources are off; and a second period in which the second light sources are on and the first light sources are off. The detection device is configured to combine a first image detected in the first period with a second image detected in the second period.
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公开(公告)号：US20230017345A1
公开(公告)日：2023-01-19
申请号：US17947559
申请日：2022-09-19
Applicant: Japan Display Inc.
Inventor： Akihiko FUJISAWA , Kaoru ITO
IPC: G06F3/041 , G06F3/044 , G02F1/1333 , G02F1/1343 , G04G21/08 , G04G17/04
Abstract: According to one embodiment, a display device includes a display area, a plurality of sensor electrodes and a shield electrode. The display panel includes a first substrate, a second substrate opposed to the first substrate, a liquid crystal layer sealed between the first substrate and the second substrate, a pixel electrode, and a counter-electrode. The plurality of sensor electrodes are arranged to surround the display area. The shield electrode is arranged between the plurality of sensor electrodes and the pixel electrode or the counter-electrode located closest to a boundary between the display area and a non-display area surrounding the display area, in planar view. A predetermined reference voltage is applied to the shield electrode.
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公开(公告)号：US20250146928A1
公开(公告)日：2025-05-08
申请号：US19018010
申请日：2025-01-13
Applicant: Japan Display Inc.
Inventor： Tomoyuki ISHIHARA , Akihiko FUJISAWA , Chikyu NAKAOKA , Tsutomu HARADA , Kaoru ITO , Norio MAMBA
IPC: G01N21/17
Abstract: According to an aspect, a detection device includes: a plurality of photodiodes provided on a substrate; a plurality of light emitters arranged so as to face the photodiodes; and a collimating lens that is located between the photodiodes and the light emitters and is configured to emit parallel light toward the photodiodes. At least one of the light emitters is configured to be brought into a lit state and other of the light emitters are configured to be brought into an unlit state. The collimating lens is configured to emit the parallel light at a different emission angle depending on a position of the light emitter in the lit state.
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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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