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公开(公告)号：US20230070145A1
公开(公告)日：2023-03-09
申请号：US17985895
申请日：2022-11-13
发明人： Chi-Ting Chen
IPC分类号： G06V40/13
摘要： A readout integrated circuit configured to read out sensing signals from an optical sensing panel is provided. The optical sensing panel includes a sensor array for fingerprint sensing. The readout integrated circuit includes a plurality of input terminals and a first discharging circuit. The plurality of input terminals are coupled to a plurality of output terminals of the optical sensing panel. The first discharging circuit is coupled to one of the plurality of input terminals. The first discharging circuit serves to discharge an output terminal included in the plurality of output terminals of the optical sensing panel by a first current during a readout period. The readout integrated circuit reads out a voltage of the output terminal as a sensing signal. The first discharging circuit includes a first switch element controlled by a control signal and a first current source which generates the first current.
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公开(公告)号：US11201181B2
公开(公告)日：2021-12-14
申请号：US17078060
申请日：2020-10-22
发明人： Chi-Ting Chen
IPC分类号： H01L27/146
摘要： An image sensor includes a sensor layer and a metal layer. The sensor layer includes a plurality of sensing elements arranged as a 2-dimensional array along a first direction and a second direction. The metal layer includes a plurality of metal wires configured to form a plurality of apertures superposed on the plurality of sensing elements. At least one of the plurality of metal wires forming the plurality of apertures is entirely disposed along a third direction different from the first direction and the second direction.
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公开(公告)号：US11178351B1
公开(公告)日：2021-11-16
申请号：US16869584
申请日：2020-05-07
发明人： Kuo Wei Cheng , Chi-Ting Chen
IPC分类号： H04N5/378 , H04N5/357 , H01L27/146 , H04N5/3745
摘要： A readout circuit is provided. The readout circuit is coupled to a pixel circuit for reading out signals from the pixel circuit. The readout circuit includes a biasing circuit. The biasing circuit includes a cascode transistor and a biasing transistor. A first terminal of the cascode transistor is coupled to an output terminal of the biasing circuit and the pixel circuit. A second terminal of the cascode transistor is coupled to a first terminal of the biasing transistor. A second terminal of the biasing transistor is coupled to a negative voltage.
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公开(公告)号：US20210352237A1
公开(公告)日：2021-11-11
申请号：US16869584
申请日：2020-05-07
发明人： Kuo Wei Cheng , Chi-Ting Chen
IPC分类号： H04N5/378 , H04N5/3745 , H04N5/357 , H01L27/146
摘要： A readout circuit is provided. The readout circuit is coupled to a pixel circuit for reading out signals from the pixel circuit. The readout circuit includes a biasing circuit. The biasing circuit includes a cascode transistor and a biasing transistor. A first terminal of the cascode transistor is coupled to an output terminal of the biasing circuit and the pixel circuit. A second terminal of the cascode transistor is coupled to a first terminal of the biasing transistor. A second terminal of the biasing transistor is coupled to a negative voltage.
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公开(公告)号：US11112302B2
公开(公告)日：2021-09-07
申请号：US16290948
申请日：2019-03-03
发明人： Jung-Chen Chung , Chi-Ting Chen
摘要： A method of switching a control voltage of a photo sensor cell for a photo sensor includes when the photo sensor cell is switched from a turned-off state to an turned-on state, sequentially switching the control voltage to at least one first voltage provided by at least one first voltage supply, and switching the control voltage to a first target voltage provided by a first charging pump circuit; and when the photo sensor cell is switched from the turned-on state to the turned-off state, sequentially switching the control voltage to at least one second voltage provided by at least one second voltage supply or a ground voltage, and switching the control voltage to a second target voltage provided by a second charging pump circuit.
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公开(公告)号：US20200265206A1
公开(公告)日：2020-08-20
申请号：US16531126
申请日：2019-08-05
发明人： Jung-Chen Chung , Chi-Ting Chen
摘要： A fingerprint and proximity sensing apparatus for fingerprint recognizing and proximity sensing is provided. The fingerprint and proximity sensing apparatus includes a display panel, a fingerprint sensor, and at least one proximity sensing light emitting diode. The fingerprint sensor has an optical sensing array. The optical sensing array is configured to receive a first light emitted from the display panel and a second light emitted from the at least one proximity sensing light emitting diode at different time periods. The first light and the second light have different ranges of wave length. A sensing process is also provided.
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公开(公告)号：US11830280B1
公开(公告)日：2023-11-28
申请号：US17869773
申请日：2022-07-20
发明人： Jung-Chen Chung , Chi-Ting Chen , Jung-Yu Tsai
CPC分类号： G06V40/1318 , G06F3/0418 , G06F3/04166
摘要： An image processing circuit for controlling a panel is configured to: receive information of a fixed pattern noise (FPN) corresponding to a first sensing zone of the panel, wherein the first sensing zone is determined according to a touch position of a finger; scan the first sensing zone to perform fingerprint sensing on the finger, to receive a plurality of raw sensing signals; remove the FPN from the plurality of raw sensing signals to generate a plurality of modified sensing signals; and output a plurality of fingerprint data to a host for fingerprint recognition, wherein the plurality of fingerprint data are converted from the plurality of modified sensing signals.
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公开(公告)号：US11749014B2
公开(公告)日：2023-09-05
申请号：US17394329
申请日：2021-08-04
发明人： Jung-Chen Chung , Chi-Ting Chen
CPC分类号： G06V40/1318 , G06F3/0412 , G06F3/0421
摘要： An optical fingerprint sensing apparatus, a driver apparatus, and an operation method are provided. The driver apparatus includes a display driving device and a fingerprint sensing driving device. The display driving device drives the display panel to display different frames with different luminances, and the different frames are used to generate at least one of different transmitted light intensities and different reflected light intensities. The fingerprint sensing driving device drives the display panel to perform a fingerprint capturing operation to capture a plurality of different fingerprint images of a finger under the at least one of the different transmitted light intensities and the different reflected light intensities. The different fingerprint images are processed to generate a processed fingerprint image.
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公开(公告)号：US11551472B1
公开(公告)日：2023-01-10
申请号：US17749096
申请日：2022-05-19
发明人： Ping Liu , Chi-Ting Chen
摘要： A method of fingerprint recognition for a fingerprint sensing circuit includes steps of: performing a first fingerprint sensing process including a first exposure operation and a first readout operation under a first light spot setting; and performing a second fingerprint sensing process including a second exposure operation and a second readout operation under a second light spot setting. Wherein, a host performs a first fingerprint recognition in response to the first fingerprint sensing process; and wherein, the second light spot setting and the first fingerprint recognition are performed simultaneously.
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公开(公告)号：US11503241B2
公开(公告)日：2022-11-15
申请号：US17168185
申请日：2021-02-05
发明人： Chi-Ting Chen
摘要： A readout integrated circuit configured to read out sensing signals from an optical sensing panel is provided. The optical sensing panel includes a sensor array for fingerprint sensing. The readout integrated circuit includes a plurality of input terminals, a first discharging circuit and a control circuit. The plurality of input terminals are configured to be coupled to a plurality of output terminals of the optical sensing panel. The first discharging circuit is coupled to one of the plurality of input terminals. The first discharging circuit is configured to discharge one of the plurality of output terminals of the optical sensing panel by a first current during a readout period. The readout integrated circuit reads out a voltage of the output terminal as a sensing signal. The control circuit is coupled to the first discharging circuit. The control circuit is configured to output at least one control signal to control an operating period of the first discharging circuit.
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