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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：US20240231136A9
公开(公告)日：2024-07-11
申请号：US18490130
申请日：2023-10-19
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：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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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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Patent Agency Ranking
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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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：US20230130956A1
公开(公告)日：2023-04-27
申请号：US17969025
申请日：2022-10-19
Applicant: Japan Display Inc.
Inventor： Akihiko FUJISAWA , Takaaki KONO
IPC: G06V40/13
Abstract: A detection device includes a plurality of detection elements arranged in a matrix having a row-column configuration in a detection area of a substrate, and an initialization circuit configured to apply an initialization potential to each of the detection elements. The initialization circuit has a first mode to apply a same initialization potential to all the detection elements and a second mode to apply different initialization potentials to the detection elements adjacent to each other.
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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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