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公开(公告)号：US10903313B2
公开(公告)日：2021-01-26
申请号：US15638834
申请日：2017-06-30
Inventor： John Kevin Moore , Caixin Zhuang
IPC: G01S17/10 , G01S7/497 , H05B45/00 , H05B47/18 , G01S7/4863 , G09G3/3216 , G09G3/3283 , H01L29/06 , H01L31/02 , H01L31/107
Abstract: A single photon avalanche diode based range detecting apparatus includes a reference array of single photon avalanche diodes configured to receive light from an illumination source via an internally coupled path. A return array of single photon avalanche diodes is configured to receive light from the illumination source via an external free space path. A calibration pulse generator is configured to generate a calibration signal pulse. Readout circuitry is configured to receive an output of the reference array via a reference signal path, an output of the return array via a return signal path, and an output of the calibration pulse generator via a calibration signal path. The readout circuitry is configured to determine a delay difference value between the reference signal path and the return signal path based on the output of the calibration pulse generator via the calibration signal path.
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公开(公告)号：US20180198440A1
公开(公告)日：2018-07-12
申请号：US15403631
申请日：2017-01-11
Inventor： Caixin Zhuang
CPC classification number: H03K5/2481 , H03K3/037 , H03K5/249 , H03K2005/00019 , H03K2005/00045
Abstract: An embodiment circuit includes a first voltage-controlled delay line (VCDL), a second VCDL, and a first flip-flop. The first VCDL includes a first input terminal configured to receive a first input voltage, and a second input terminal configured to receive a clock signal. The second VCDL includes a first input terminal configured to receive a second input voltage, and a second input terminal configured to receive the clock signal. The first flip-flop includes a reset pin coupled to an output terminal of the first VCDL, and a clock pin coupled to an output terminal of the second VCDL.
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Patent Agency Ranking
公开(公告)号：US11604265B2
公开(公告)日：2023-03-14
申请号：US16696984
申请日：2019-11-26
Inventor： Caixin Zhuang , John Kevin Moore
IPC: G01S7/4865 , G01S17/89 , G01S17/10 , G01S7/4863
Abstract: In one embodiment, an imaging device includes a light-emitting device, a driving circuit, a return single-photon avalanche diode (SPAD) array and readout circuitry. The driving circuit generates a driving signal, and the light-emitting device generates an optical pulse based on the driving signal. The return SPAD array is configured to receive a first portion of the optical pulse that is reflected by an object in an image scene. The readout circuitry receives a signal indicative of the received first portion of the optical pulse, and a signal indicative of the driving signal, and determines a distance between the imaging device and the object based on a difference between a time of receiving the signal indicative of the received first portion of the optical pulse and a time of receiving the signal indicative of the driving signal.
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公开(公告)号：US11412590B2
公开(公告)日：2022-08-09
申请号：US17143840
申请日：2021-01-07
Inventor： John Kevin Moore , Caixin Zhuang
IPC: H05B45/30 , G01S17/10 , G01S7/497 , H05B47/18 , H05B45/00 , G01S7/4863 , G09G3/3216 , G09G3/3283 , H01L29/06 , H01L31/02 , H01L31/107 , H05B45/32
Abstract: A single photon avalanche diode based range detecting apparatus includes a reference array of single photon avalanche diodes configured to receive light from an illumination source via an internally coupled path. A return array of single photon avalanche diodes is configured to receive light from the illumination source via an external free space path. A calibration pulse generator is configured to generate a calibration signal pulse. Readout circuitry is configured to receive an output of the reference array via a reference signal path, an output of the return array via a return signal path, and an output of the calibration pulse generator via a calibration signal path. The readout circuitry is configured to determine a delay difference value between the reference signal path and the return signal path based on the output of the calibration pulse generator via the calibration signal path.
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公开(公告)号：US20210134943A1
公开(公告)日：2021-05-06
申请号：US17143840
申请日：2021-01-07
Inventor： John Kevin Moore , Caixin Zhuang
IPC: H01L29/06 , G01S17/10 , G01S7/497 , H05B45/00 , H05B47/18 , G01S7/4863 , G09G3/3216 , G09G3/3283 , H01L31/02 , H01L31/107
Abstract: A single photon avalanche diode based range detecting apparatus includes a reference array of single photon avalanche diodes configured to receive light from an illumination source via an internally coupled path. A return array of single photon avalanche diodes is configured to receive light from the illumination source via an external free space path. A calibration pulse generator is configured to generate a calibration signal pulse. Readout circuitry is configured to receive an output of the reference array via a reference signal path, an output of the return array via a return signal path, and an output of the calibration pulse generator via a calibration signal path. The readout circuitry is configured to determine a delay difference value between the reference signal path and the return signal path based on the output of the calibration pulse generator via the calibration signal path.
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公开(公告)号：US10110214B2
公开(公告)日：2018-10-23
申请号：US15403631
申请日：2017-01-11
Inventor： Caixin Zhuang
Abstract: An embodiment circuit includes a first voltage-controlled delay line (VCDL), a second VCDL, and a first flip-flop. The first VCDL includes a first input terminal configured to receive a first input voltage, and a second input terminal configured to receive a clock signal. The second VCDL includes a first input terminal configured to receive a second input voltage, and a second input terminal configured to receive the clock signal. The first flip-flop includes a reset pin coupled to an output terminal of the first VCDL, and a clock pin coupled to an output terminal of the second VCDL.
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公开(公告)号：US20180102407A1
公开(公告)日：2018-04-12
申请号：US15638834
申请日：2017-06-30
Inventor： John Kevin Moore , Caixin Zhuang
IPC: H01L29/06 , H01L31/02 , G09G3/3283 , G09G3/3216 , H01L31/107 , G01S7/486 , H05B33/08 , H05B37/02
CPC classification number: H01L29/0642 , G01S7/4863 , G01S7/497 , G01S17/10 , G09G3/3216 , G09G3/3283 , H01L31/02027 , H01L31/107 , H05B33/0842 , H05B37/0254
Abstract: A single photon avalanche diode based range detecting apparatus includes a reference array of single photon avalanche diodes configured to receive light from an illumination source via an internally coupled path. A return array of single photon avalanche diodes is configured to receive light from the illumination source via an external free space path. A calibration pulse generator is configured to generate a calibration signal pulse. Readout circuitry is configured to receive an output of the reference array via a reference signal path, an output of the return array via a return signal path, and an output of the calibration pulse generator via a calibration signal path. The readout circuitry is configured to determine a delay difference value between the reference signal path and the return signal path based on the output of the calibration pulse generator via the calibration signal path.
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