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公开(公告)号：US11353555B2
公开(公告)日：2022-06-07
申请号：US16178080
申请日：2018-11-01
Applicant: Luminar Technologies, Inc.
Inventor： Stephen D. Gaalema
IPC: G01S17/88 , G01S7/48 , G01S7/4912 , G01S17/42 , G01S17/931 , G01J1/46 , G01S7/4861 , H03K17/0416 , H03K17/74
Abstract: A circuit for quenching an avalanche photodiode (APD) detector is disclosed herein. The circuit may comprise a discrete transistor configured to draw a quench current so as to enable a drop in a reverse bias voltage applied to the APD detector, and an integrated circuit connected to the discrete transistor, the integrated circuit including a plurality of circuit elements for controlling the reverse bias voltage.
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2.发明授权公开(公告)号：US10267918B2
公开(公告)日：2019-04-23
申请号：US16017650
申请日：2018-06-25
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Joseph G. LaChapelle , Jason M. Eichenholz , Stephen D. Gaalema , Austin K. Russell
IPC: G01S17/89 , G01S7/48 , G01J1/44 , G01S17/93 , G01S7/481 , G01S7/497 , G01S17/10 , G01S7/486 , G01S7/484 , G01S17/42 , G01S17/87 , G01S7/00 , G01S7/487 , H01L31/09
Abstract: A scanning system includes a light source configured to emit light as a series of one or more light pulses, a scanner configured to direct the one or more light pulses towards a remote target, and a receiver configured to detect light scattered by the remote target. The receiver includes a light detector element disposed on an ASIC that includes multiple comparators disposed in parallel with one another, and corresponding time-to-digital converters (TDCs) coupled to the comparator. Each of the comparators processes a received electrical signal from the light detector element to produce a digital edge signal when the amplitude of the received electrical signal reaches a particular threshold. A corresponding TDC outputs a time delay value associated with a time at which the received electrical signal reaches the particular threshold.
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公开(公告)号：US11774561B2
公开(公告)日：2023-10-03
申请号：US16271119
申请日：2019-02-08
Applicant: Luminar Technologies, Inc.
Inventor： Stephen D. Gaalema , Robert D. Still
Abstract: Amplifier input protection circuits are described. In one embodiment, a photoreceiver for a lidar system has a photodetector configured to generate an output current in response to received light. A transimpedance amplifier is configured to receive the output current and generate a voltage output corresponding to the output current in response thereto, and a diode circuit has a cathode coupled at a node between the photodetector output and the transimpedance amplifier input.
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公开(公告)号：US10401480B1
公开(公告)日：2019-09-03
申请号：US16210704
申请日：2018-12-05
Applicant: Luminar Technologies, Inc.
Inventor： Stephen D. Gaalema , Mark A. Drummer , Stephen L. Mielke , Jason M. Eichenholz
Abstract: In one embodiment, a lidar system includes a light source configured to emit multiple optical signals directed into a field of regard of the lidar system. The optical signals include a first optical signal and a second optical signal, where the second optical signal is emitted a particular time interval after the first optical signal is emitted. The lidar system also includes a receiver configured to detect a received optical signal that includes a portion of the emitted first or second optical signal that is scattered by a target located a distance from the lidar system. The received optical signal is detected after the second optical signal is emitted. The receiver includes a first detector configured to detect a first portion of the received optical signal and a second detector configured to detect a second portion of the received optical signal.
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公开(公告)号：US10557940B2
公开(公告)日：2020-02-11
申请号：US15364085
申请日：2016-11-29
Applicant: Luminar Technologies, Inc.
Inventor： Jason M. Eichenholz , Austin K. Russell , Scott R. Campbell , Alain Villeneuve , Rodger W. Cleye , Joseph G. LaChapelle , Matthew D. Weed , Lane A. Martin , Stephen D. Gaalema
IPC: G01C3/08 , G01S17/10 , G01S17/42 , G01S17/93 , G01S7/481 , G01S7/484 , G01S17/08 , H01S3/067 , H01S3/08 , H01S3/094 , H01S3/0941 , H01S3/10 , H01S3/11 , H01S5/40 , G01S7/48 , G01S7/483 , G01S17/02 , H01S3/00 , G01S17/00 , G01S17/06 , G01S17/88 , G01S7/487 , H01S3/16 , G01S17/32
Abstract: In one embodiment, a lidar system includes a light source configured to emit pulses of light and a scanner configured to scan at least a portion of the emitted pulses of light across a field of regard. The lidar system also includes a receiver configured to detect at least a portion of the scanned pulses of light scattered by a target located a distance from the lidar system.
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Patent Agency Ranking
公开(公告)号：US20200256961A1
公开(公告)日：2020-08-13
申请号：US16271119
申请日：2019-02-08
Applicant: Luminar Technologies, Inc.
Inventor： Stephen D. Gaalema , Robert D. Still
Abstract: Amplifier input protection circuits are described. In one embodiment, a photoreceiver for a lidar system has a photodetector configured to generate an output current in response to received light. A transimpedance amplifier is configured to receive the output current and generate a voltage output corresponding to the output current in response thereto, and a diode circuit has a cathode coupled at a node between the photodetector output and the transimpedance amplifier input.
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公开(公告)号：US10139478B2
公开(公告)日：2018-11-27
申请号：US15861147
申请日：2018-01-03
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Stephen D. Gaalema , Austin K. Russell , Joseph G. LaChapelle , Scott R. Campbell , Jason M. Eichenholz , Tue Tran
Abstract: To decrease the likelihood of a false detection when detecting light from light pulses scattered by remote targets in a lidar system, a receiver in the lidar system includes a photodetector and a pulse-detection circuit having a gain circuit with a varying amount of gain over time. The gain circuit operates in a low-gain mode for a time period T1 beginning with time t0 when a light pulse is emitted to prevent the receiver from detecting return light pulses during the threshold time period T1. Upon expiration of the threshold time period T1, the gain circuit operates in a high-gain mode to begin detecting return light pulses until a subsequent light pulse is emitted.
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公开(公告)号：US20200182968A1
公开(公告)日：2020-06-11
申请号：US16554709
申请日：2019-08-29
Applicant: Luminar Technologies, Inc.
Inventor： Stephen D. Gaalema , Mark A. Drummer , Stephen L. Mielke , Jason M. Eichenholz
Abstract: In one embodiment, a lidar system includes a light source configured to emit multiple optical signals directed into a field of regard of the lidar system. The optical signals include a first optical signal and a second optical signal, where the second optical signal is emitted a particular time interval after the first optical signal is emitted. The lidar system also includes a receiver configured to detect a received optical signal that includes a portion of the emitted first or second optical signal that is scattered by a target located a distance from the lidar system. The received optical signal is detected after the second optical signal is emitted. The receiver includes a first detector configured to detect a first portion of the received optical signal and a second detector configured to detect a second portion of the received optical signal.
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公开(公告)号：US20200025928A1
公开(公告)日：2020-01-23
申请号：US16178080
申请日：2018-11-01
Applicant: Luminar Technologies, Inc.
Inventor： Stephen D. Gaalema
IPC: G01S17/88 , G01J1/46 , G01S7/486 , H03K17/0416 , H03K17/74
Abstract: A circuit for quenching an avalanche photodiode (APD) detector is disclosed herein. The circuit may comprise a discrete transistor configured to draw a quench current so as to enable a drop in a reverse bias voltage applied to the APD detector, and an integrated circuit connected to the discrete transistor, the integrated circuit including a plurality of circuit elements for controlling the reverse bias voltage.
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公开(公告)号：US20190079167A1
公开(公告)日：2019-03-14
申请号：US16185427
申请日：2018-11-09
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Stephen D. Gaalema , Austin K. Russell , Joseph G. LaChapelle , Scott R. Campbell , Jason M. Eichenholz , Tue Tran
Abstract: To decrease the likelihood of a false detection when detecting light from light pulses scattered by remote targets in a lidar system, a receiver in the lidar system includes a photodetector and a pulse-detection circuit having a gain circuit with a varying amount of gain over time. The gain circuit operates in a low-gain mode for a time period T1 beginning with time t0 when a light pulse is emitted to prevent the receiver from detecting return light pulses during the threshold time period T1. Upon expiration of the threshold time period T1, the gain circuit operates in a high-gain mode to begin detecting return light pulses until a subsequent light pulse is emitted.
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