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公开(公告)号：US20240220050A1
公开(公告)日：2024-07-04
申请号：US18605445
申请日：2024-03-14
Applicant: Japan Display Inc.
Inventor： Naoki TAKADA , Hiroshi YAMAGUCHI , Kisho YAMAMOTO
CPC classification number: G06F3/04166 , G06F3/0445
Abstract: According to one embodiment, a sensor device includes a panel and a control circuit. The panel includes an insulating layer, a first electrode, and a second electrode. The control circuit including a first circuit including a timing control circuit and a first amplifier, and a second circuit including a detection circuit connected to a ground line. During a first sensing drive period, the first output unit outputs a first synchronization signal, the timing control circuit outputs a second synchronization signal, the first amplifier provides the amplified second synchronization signal to each of the floating ground line and the first electrode, and the detector reads a change in a sensor signal.
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公开(公告)号：US20230194744A1
公开(公告)日：2023-06-22
申请号：US18078622
申请日：2022-12-09
Applicant: Japan Display Inc.
Inventor： Hiroshi YAMAGUCHI
CPC classification number: G01V3/088 , G06F3/044 , H03H11/04 , G06F2203/04108
Abstract: A detection device includes: a detector including first electrodes and second electrodes disposed around a the first electrodes; a detection circuit configured to detect proximity of an external object to the detector; a power circuit configured to generate a square wave; and a filter that is coupled to the power circuit through an isolator and configured to receive the square wave transmitted through the isolator. The filter includes a low-pass filter circuit and a digital potentiometer. A periodically oscillating potential based on output from the filter is provided as a reference potential of the power circuit and provided to the second electrodes. A reference potential of the filter is a fixed potential. The power circuit can change the frequency of the generated square wave. The filter can change the frequency of the periodically oscillating potential in accordance with an electric resistance value of the digital potentiometer.
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公开(公告)号：US20200210066A1
公开(公告)日：2020-07-02
申请号：US16725408
申请日：2019-12-23
Applicant: Japan Display Inc.
Inventor： Kisho YAMAMOTO , Naoki TAKADA , Hiroshi YAMAGUCHI
Abstract: According to an aspect, a detection device includes: a plurality of first sensor electrodes disposed side by side in a first direction and a second direction intersecting the first direction; and a plurality of second sensor electrodes disposed side by side in the first direction and the second direction. One of the second sensor electrodes overlaps a plurality of first sensor electrodes out of the first sensor electrodes in planar view. Each of the second sensor electrodes has a plurality of electric-field transmission regions. One of the electric-field transmission regions overlaps a corresponding one of the first sensor electrodes in planar view and does not straddle two first sensor electrodes in planar view.
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公开(公告)号：US20250123707A1
公开(公告)日：2025-04-17
申请号：US18911564
申请日：2024-10-10
Applicant: Japan Display Inc.
Inventor： Hiroshi YAMAGUCHI
Abstract: According to an aspect, a detection device includes: a sensor circuit including a plurality of sensor electrodes provided to a substrate, a peripheral electrode provided around a detection region provided with the sensor electrodes, and a shield electrode provided to a surface opposite to a surface provided with the sensor electrodes and the peripheral electrode; an AFE circuit configured to generate sensing data corresponding to a distance between the sensor electrodes and a proximity object, based on a detection signal acquired from the sensor electrodes; a drive signal generation circuit configured to generate a drive signal with a substantially sinusoidal waveform and supply the drive signal to the peripheral electrode and the shield electrode; and a control circuit configured to control the AFE circuit and the drive signal generation circuit. The control circuit controls an amplitude value of the drive signal based on the sensing data.
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Patent Agency Ranking
公开(公告)号：US20250110251A1
公开(公告)日：2025-04-03
申请号：US18976488
申请日：2024-12-11
Applicant: Japan Display Inc.
Inventor： Hiroshi YAMAGUCHI
Abstract: A detection device includes: a detector including first electrodes and second electrodes disposed around a the first electrodes; a detection circuit configured to detect proximity of an external object to the detector; a power circuit configured to generate a square wave; and a filter that is coupled to the power circuit through an isolator and configured to receive the square wave transmitted through the isolator. The filter includes a low-pass filter circuit and a digital potentiometer. A periodically oscillating potential based on output from the filter is provided as a reference potential of the power circuit and provided to the second electrodes. A reference potential of the filter is a fixed potential. The power circuit can change the frequency of the generated square wave. The filter can change the frequency of the periodically oscillating potential in accordance with an electric resistance value of the digital potentiometer.
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公开(公告)号：US20240319835A1
公开(公告)日：2024-09-26
申请号：US18735470
申请日：2024-06-06
Applicant: Japan Display Inc.
Inventor： Hiroshi YAMAGUCHI , Naoki TAKADA
CPC classification number: G06F3/0446 , G06F3/0443 , G06F3/0448 , G06F3/04166
Abstract: A detection device includes a plurality of first detection electrodes disposed in a matrix of rows and columns in a detection region of a substrate, at least one second detection electrode disposed in a peripheral region outside the detection region, positioned adjacent to some of the plurality of the first detection electrodes, and provided along a side of the detection region, and a coordinate calculation circuit configured to calculate a detection position of a detection target body.
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公开(公告)号：US20240256093A1
公开(公告)日：2024-08-01
申请号：US18418616
申请日：2024-01-22
Applicant: Japan Display Inc.
Inventor： Hiroshi YAMAGUCHI
CPC classification number: G06F3/0446 , G06F3/0412
Abstract: A detecting device includes a plurality of sensor electrodes provided to a detection region, a power supply circuit configured to generate a second reference potential that fluctuates periodically based on a first power supply potential that is substantially constant with respect to a first reference potential serving as a fixed potential and generate a second power supply potential that is substantially constant with respect to the second reference potential, and an AFE circuit configured to supply a drive signal to the sensor electrodes, acquire a detection signal generated in the sensor electrodes, and output a square wave signal in synchronization with the drive signal.
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公开(公告)号：US20230297198A1
公开(公告)日：2023-09-21
申请号：US18108389
申请日：2023-02-10
Applicant: Japan Display Inc.
Inventor： Hiroshi YAMAGUCHI , Naoki TAKADA
IPC: G06F3/044
CPC classification number: G06F3/0446 , G06F3/0443 , G06F3/0448 , G06F3/04166
Abstract: A detection device includes a plurality of first detection electrodes disposed in a matrix of rows and columns in a detection region of a substrate, at least one second detection electrode disposed in a peripheral region outside the detection region, positioned adjacent to some of the plurality of the first detection electrodes, and provided along a side of the detection region, and a coordinate calculation circuit configured to calculate a detection position of a detection target body.
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公开(公告)号：US20220283689A1
公开(公告)日：2022-09-08
申请号：US17825791
申请日：2022-05-26
Applicant: Japan Display Inc.
Inventor： Naoki TAKADA , Hiroshi YAMAGUCHI , Kisho YAMAMOTO
Abstract: According to one embodiment, a sensor device includes a panel and a control circuit. The panel includes an insulating layer, a first electrode, and a second electrode. The control circuit including a first circuit including a timing control circuit and a first amplifier, and a second circuit including a detection circuit connected to a floating ground line. During a first sensing drive period, the first output unit outputs a first synchronization signal, the timing control circuit outputs a second synchronization signal, the first amplifier provides the amplified second synchronization signal to each of the floating ground line and the first electrode, and the detector reads a change in a sensor signal.
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