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1
US2021025991A1
LOW NOISE FRONTENDS FOR LIDAR RECEIVER AND METHODS FOR CONTROLLING THE SAME COMPRISING A MULTIPLEXING CIRCUIT FOR SELECTIVELY CONNECTING EACH PHOTODETECTOR TO A SHARED AMPLIFIER
Publication/Patent Number: US2021025991A1 Publication Date: 2021-01-28 Application Number: 17/033,917 Filing Date: 2020-09-27 Inventor: Chawla, Vipul   Lu, Yue   Kong, Lingkai   Assignee: BEIJING VOYAGER TECHNOLOGY CO., LTD.   IPC: G01S7/4863 Abstract: An optical signal detection system includes a plurality of photodetectors configured to detect optical signals reflected from an environment surrounding the optical signal detection system and convert the optical signals into electrical signals. The optical signal detection system also includes an amplifier coupled to the plurality of photodetectors. The amplifier is shared by the plurality of photodetectors and configured to generate an output signal by amplifying an individual electrical signal converted by a corresponding photodetector. The optical signal detection system further includes a multiplexing circuit configured to selectively establish a connection between one of the plurality of photodetectors and the amplifier to amply the electrical signal converted by that photodetector.
2
CN112558093A
光学接近传感器及对应的操作方法
Substantial Examination
Publication/Patent Number: CN112558093A Publication Date: 2021-03-26 Application Number: 202010927579.1 Filing Date: 2020-09-07 Inventor: D·n·圣菲利波   Assignee: 意法半导体股份有限公司   IPC: G01S17/10 Abstract: 本公开的实施例涉及光学接近传感器及对应的操作方法。光学接近传感器,包括固态光电转换器、偏置固态光电转换器的偏置电路,以及驱动电路。驱动电路配置为控制偏置电路以将在第一值和第二值之间调制的偏置信号施加到光电转换器,第二值与第一值不同,由固态光电转换器向目标对象发射经调制的光学信号。驱动电路配置为从固态光电转换器接收电输出信号,该电输出信号根据由于所发射的经调制的光学信号在目标对象处的反射而在固态光电转换器处接收的经调制的光学信号而变化。驱动电路配置为执行经调制的偏置信号与电输出信号的相位比较,且作为相位比较的结果产生相移信号。驱动电路配置为根据相移信号来计算光学接近传感器与目标对象之间的距离。
3
US2021088635A1
PHOTODETECTOR AND DISTANCE MEASURING DEVICE
Publication/Patent Number: US2021088635A1 Publication Date: 2021-03-25 Application Number: 16/923,366 Filing Date: 2020-07-08 Inventor: Kubota, Hiroshi   Matsumoto, Nobu   Assignee: Kabushiki Kaisha Toshiba   Toshiba Electronic Devices & Storage Corporation   IPC: G01S7/4863 Abstract: A photodetector includes a plurality of channels each having a plurality of SPAD units, each SPAD unit having an avalanche photodiode. The photodetector is capable of selecting outputting or non-outputting of the channels. The SPAD unit includes: an active quenching circuit which performs active quenching of the avalanche photodiode; and a control circuit which brings the active quenching circuit which corresponds to the channel where non-outputting is selected into an operable state.
4
US2021063544A1
LIGHT DETECTION AND RANGING RECEIVER WITH AVALANCHE PHOTODIODES
Publication/Patent Number: US2021063544A1 Publication Date: 2021-03-04 Application Number: 16/787,604 Filing Date: 2020-02-11 Inventor: Ramakrishnan, Srikanth   Zheng, Jimmy   Assignee: Lumentum Operations LLC   IPC: G01S7/4863 Abstract: A light detection and ranging (lidar) receiver may include a first photodiode, a first amplifier connected to the first photodiode, and a first analog-to-digital converter (ADC) connected to an output of the first amplifier. The lidar receiver may include a second photodiode, a second amplifier connected to the second photodiode, and a second ADC connected to the second amplifier. The lidar may include a processor connected to an output of the first ADC and an output of the second ADC and a direct-current-to-direct-current converter connected to an output of the processor and to the first photodiode and the second photodiode. The processor may determine, based on the output of the first ADC and the output of the second ADC, a first bias to apply to the first photodiode and a second bias to apply to the second photodiode.
5
EP3796035A1
SPAD PHOTODETECTOR ARRAY WITH ACTIVE QUENCHING AND OUTPUT CONTROL
Publication/Patent Number: EP3796035A1 Publication Date: 2021-03-24 Application Number: 20183174.0 Filing Date: 2020-06-30 Inventor: Kubota, Hiroshi   Matsumoto, Nobu   Assignee: KABUSHIKI KAISHA TOSHIBA   Toshiba Electronic Devices & Storage Corporation   IPC: G01S7/4863 Abstract: A photodetector (14) includes a plurality of channels (21) each having a plurality of SPAD units (32), each SPAD unit having an avalanche photodiode (42). The photodetector (14) is capable of selecting outputting or non-outputting of the channels (21). The SPAD unit (32) includes: an active quenching circuit (43, 44) which performs active quenching of the avalanche photodiode (42); and a control circuit(11) which brings the active quenching circuit (43, 44) which corresponds to the channel where non-outputting is selected into an operable state.
6
US2021132199A1
DISTANCE SENSOR AND DISTANCE IMAGE SENSOR
Publication/Patent Number: US2021132199A1 Publication Date: 2021-05-06 Application Number: 16/322,664 Filing Date: 2017-05-30 Inventor: Mase, Mitsuhito   Hiramitsu, Jun   Shimada, Akihiro   Assignee: HAMAMATSU PHOTONICS K.K.   IPC: G01S7/4863 Abstract: A range sensor includes a silicon substrate and a transfer electrode. The silicon substrate includes a first principal surface and a second principal surface opposing each other. The silicon substrate is provided with a charge generation region configured to generate a charge in response to incident light and a charge collection region configured to collect charges from the charge generation region, on the first principal surface side. The transfer electrode is disposed between the charge generation region and the charge collection region on the first principal surface. A region of the second principal surface corresponding at least to the charge generation region is formed with a plurality of protrusions. The plurality of protrusions includes a slope inclined with respect to a thickness direction of the silicon substrate. A (111) plane of the silicon substrate is exposed as the slope at the protrusion. A height of the protrusion is 200 nm or more.
7
US2021041540A1
LIGHT RECEIVING DEVICE AND DISTANCE MEASURING DEVICE
Publication/Patent Number: US2021041540A1 Publication Date: 2021-02-11 Application Number: 16/979,483 Filing Date: 2019-03-06 Inventor: Shinozuka, Yasuhiro   Kamizuru, Hayato   Assignee: Sony Semiconductor Solutions Corporation   IPC: G01S7/4863 Abstract: A light receiving device of the present disclosure includes: a pixel array unit having a plurality of pixels 501 to 504 each including a light receiving unit 501 to 504 that generates a signal according to reception of photons; a first switch unit that 611 to 614 recharges the light receiving unit 501 to 504; and a recharge control unit 64 that controls the first switch unit 611 to 614 according to output of the light receiving unit 501 to 504, and the recharge control unit 64 is shared among the plurality of pixels 501 to 504. By this sharing of the recharge control unit 64, since the circuit area of the circuit unit 60 per pixel can be reduced, the aperture ratio can be increased while miniaturizing the pixel 50. Preferably, the recharge control unit 64 includes a four-input OR circuit 641 and a recharge signal generation circuit 642. The OR circuit 641 obtains the OR of the logic signals retrieved from each cathode electrode of the SPAD sensors 501 to 504 supplied through the comparators 631 to 634. The OR output of the OR circuit 641 is supplied to the recharge signal generation circuit 642. The recharge signal generation circuit 642 generates the recharge signal RCHG by delaying the OR output of the OR circuit 641 by a predetermined delay time, and supplies the recharge signal RCHG to the first switch units 611 to 614. As a result, the recharge control unit 64 performs the recharge control in response to the OR signal of the logic signal whose logic is inverted at the time when photons are incident on one or more of the SPAD sensors 501 to 504. Furthermore, a distance measuring device of the present disclosure includes: a light source that irradiates an object to be measured with light; and a light receiving device that receives light reflected by the object to be measured, and the light receiving device includes the light receiving device having the above configuration.
8
US2021088658A1
DISTANCE MEASURING APPARATUS
Publication/Patent Number: US2021088658A1 Publication Date: 2021-03-25 Application Number: 17/112,559 Filing Date: 2020-12-04 Inventor: Hata, Takehiro   Ozaki, Noriyuki   Kimura, Teiyu   Assignee: DENSO CORPORATION   IPC: G01S17/08 Abstract: A distance measuring apparatus is provided which includes an illuminator, a plurality of photodetectors which detect reflected light arising from reflection of light, as emitted from the illuminator, from an object using SPADs, a time measuring unit which measures time elapsed after the emission of light from the illuminator until a number of the photodetectors which is larger than a given value have detected light, a timing controller which instructs the illuminator to emit the light, activates the SPADs in a Geiger mode, and instructs the time measuring unit to execute the time measurement, and a timing instruction unit which determines a light emission timing and an activation start timing of each of the SPADs for the timing controller.
9
US2021088661A1
PHOTODETECTOR AND OPTICAL RANGING APPARATUS USING THE SAME
Publication/Patent Number: US2021088661A1 Publication Date: 2021-03-25 Application Number: 16/952,616 Filing Date: 2020-11-19 Inventor: Hata, Takehiro   Azuma, Kenta   Matsubara, Hiroyuki   Takai, Isamu   Assignee: DENSO CORPORATION   IPC: G01S17/14 Abstract: A photodetector and an optical ranging apparatus provided with the photodetector are disclosed. The photodetector includes a pulse output section that changes an output from a light-receiving element to a rectangular pulse having a predetermined pulse width and outputs the rectangular pulse. Further, the photodetector also includes a pulse conversion circuit that converts the rectangular pulse to a rectangular pulse having a pulse width different from the predetermined pulse, based on the rise and fall of the rectangular pulse.
10
US2021109201A1
LIDAR WITH HIGH TIME RESOLUTION
Publication/Patent Number: US2021109201A1 Publication Date: 2021-04-15 Application Number: 17/128,924 Filing Date: 2020-12-21 Inventor: Cao, Peiyan   Liu, Yurun   Assignee: SHENZHEN XPECTVISION TECHNOLOGY CO., LTD.   IPC: G01S7/4865 Abstract: Disclosed herein is a method and apparatus for determining time of arrival of incident photons. The time of arrival may be determined with high time accuracy based on characteristics of the rate of change of a voltage across a capacitor being charged by charge carriers generated from the incident photons.
11
EP3615959B1
A PIXEL STRUCTURE
Publication/Patent Number: EP3615959B1 Publication Date: 2021-04-21 Application Number: 18722424.1 Filing Date: 2018-04-23 Inventor: Van, Dyck Dirk   Paesen, Rik   Assignee: XenomatiX NV   IPC: G01S17/18
12
US2021124019A1
LIDAR OPTICAL SYSTEM WITH FLAT OPTICS AND ROTATING MIRROR ENABLING 360-DEGREE FIELD-OF-VIEW AT HIGH FRAME RATE, HIGH SPATIAL RESOLUTION AND LOW POWER CONSUMPTION
Publication/Patent Number: US2021124019A1 Publication Date: 2021-04-29 Application Number: 17/077,987 Filing Date: 2020-10-22 Inventor: Tsai, Jack   Kose, Rickmer E.   Lin, Ming Chou   Oliver, Daniel B.   Assignee: Lookit.ai   IPC: G01S7/481 Abstract: A 360-degree Field-Of-View LiDAR is capable of delivering light to a target and detecting a fraction of the light reflected from the target to determine the distance from the light source/detector to the target placed at any point of a 360-degree panoramic field of view across various vertical elevation angles depending on the azimuthal angles. The LiDAR implementation allows the built-in array laser light source and an array of detectors to be scanned across the entire azimuthal angular range. The LiDAR implementation has the unique arrangement of the array of laser light sources, and the array of detectors affixed to a rigid base while the rotating periscope scanner contains a motor and mirror which can rotate in-plane to project the light source to its surroundings and receive light from surroundings. The system delivers a high frame rate, a high spatial (VGA-like) resolution, and a low power consumption system.
13
US2021072359A1
PHOTO DETECTION DEVICE, ELECTRONIC DEVICE, AND PHOTO DETECTION METHOD
Publication/Patent Number: US2021072359A1 Publication Date: 2021-03-11 Application Number: 16/812,488 Filing Date: 2020-03-09 Inventor: Ta, Tuan Thanh   Sai, Akihide   Okuni, Hidenori   Sugimoto, Toshiki   Assignee: KABUSHIKI KAISHA TOSHIBA   IPC: G01S7/4863 Abstract: A photo detection apparatus has an array of light detectors that can be switched to an ON state to enable output of a signal based on reception light or an OFF state to disable output of the signal based on reception light, and control circuitry configured to set one or more first light detectors inside a region specified according to overlapping of a region irradiated with light from a first direction and a region capable of detecting light to the ON state among the array of light detectors, when the light from the first direction is received by the array and set second light detectors outside of the specified region to the OFF state among the array of light detectors, when light from a first direction is received by the array.
14
CN112558079A
用于光学检测的数据简化
Substantial Examination
Publication/Patent Number: CN112558079A Publication Date: 2021-03-26 Application Number: 202010944630.X Filing Date: 2020-09-10 Inventor: R·a·卡普斯塔   B·d·汉密尔顿   Assignee: 亚德诺半导体国际无限责任公司   IPC: G01S17/02 Abstract: 本公开涉及用于光学检测的数据简化。在光学检测系统中,在与下游对象或者目标处理电路进行电路间通信之前,可以从ADC电路数据中识别目标特征。以这种方式,与其它方法相比,可以减少传输到此类下游处理电路的数据量,从而简化接收信号处理链并且节省功率。用于识别所述目标特征的第一层信号处理电路可以位于与ADC电路共用的集成电路封装上或者封装内,并且用于对象处理或者范围估计的下游处理电路可以由数据链路馈送,所述数据链路比所述ADC电路和所述第一层信号处理电路之间的链路满足更少的严格要求。
15
US2021003678A1
ELECTRONIC DEVICE, LIGHT RECEIVING DEVICE, LIGHT PROJECTING DEVICE, AND DISTANCE MEASUREMENT METHOD
Publication/Patent Number: US2021003678A1 Publication Date: 2021-01-07 Application Number: 16/811,120 Filing Date: 2020-03-06 Inventor: Okuni, Hidenori   Ta, Tuan Thanh   Kondo, Satoshi   Sugimoto, Toshiki   Yoshioka, Kentaro   Sai, Akihide   Assignee: KABUSHIKI KAISHA TOSHIBA   IPC: G01S7/4863 Abstract: An electronic apparatus has a light detector configured to detect light by converting a reception photon into a signal and incapable of converting an additional photon into the signal during a recovery period after a reception of photons, a light projector configured to project light having a pulse width different from any of n times the recovery period (n is an integer of 1 or more), and a processor configured to measure a distance to a target object by using a time difference between a timing at which light is projected by the light projector and a timing at which light comprising a reflected wave is detected by the light detector, wherein the reflected wave is obtained by reflection of the light projected by the light projector onto the target object.
16
US2021080553A1
PHOTODETECTORS AND METHODS AND RANGING DEVICES AND METHODS
Publication/Patent Number: US2021080553A1 Publication Date: 2021-03-18 Application Number: 17/103,009 Filing Date: 2020-11-24 Inventor: Nonomura, Takehito   Assignee: NIKON VISION CO., LTD.   IPC: G01S7/4863 Abstract: With a ranging device and a ranging method according to the present embodiment, occurrence of a first event in which the intensity of a detection signal corresponding to reflected light output from a detection unit exceeds a first threshold and occurrence of a second event in which the intensity falls below a second threshold smaller or larger than the first threshold are counted for each predetermined elapsed time after the measuring beam emission from a projector. Based on integration results (i.e., histograms) obtained by integrating the counts for a plurality of times of light emission, a target signal derived from the reflected light can be extracted from the detection signal including random noise derived from external light, a detection time from the light emission to the detection by the detection unit can be determined, and a distance to an object can be precisely determined.
17
CN212321831U
一种面阵式激光雷达光路系统及激光雷达
Grant
Publication/Patent Number: CN212321831U Publication Date: 2021-01-08 Application Number: 202020781225.6 Filing Date: 2020-05-12 Inventor: 谭旭军   樊瑞琳   李黎   Assignee: 湖南拉曼科技有限公司   IPC: G01S7/481 Abstract: 本实用新型公开了一种面阵式激光雷达光路系统,包括:阵列式发射模块,所述阵列式发射模块包括多个按阵列布置的激光二极管,多个所述激光二极管输出的激光束组成激光束面阵;阵列式接收模块,所述阵列式发射模块包括多个按阵列布置的雪崩光电二极管;透镜模组,设置在所述阵列式发射模块与所述阵列式发射模块之间以用于约束激光束的传输。本技术方案通过将发射与接收端皆设计成面阵式发射和面阵式接收,实了现发射组件、接收组件高度集成,简化生产工艺,提高光调效率,从而降低产品成本;并且,相比线阵发射,面阵式发射可大大提高激光雷达的扫描分辨率,兼顾水平与垂直方向的聚焦性能,使得正焦效果更佳。
18
US2021041568A1
GM-APD ARRAY LIDAR IMAGING METHOD AND SYSTEM UNDER STRONG BACKGROUND NOISE
Publication/Patent Number: US2021041568A1 Publication Date: 2021-02-11 Application Number: 16/898,404 Filing Date: 2020-06-10 Inventor: Zhang, Tianxu   Sang, Hongshi   Tu, Zhijian   Liu, Yufeng   Cao, Zongkai   Li, Li   Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY   IPC: G01S17/89 Abstract: The disclosure discloses a Gm-APD array lidar imaging method under strong background noise, comprising following steps: respectively acquiring two sets of cumulative detection data of the Gm-APD array lidar at two different opening times of a range gate of the Gm-APD array lidar under strong background noise; respectively performing a statistic operation on the two sets of cumulative detection data of the Gm-APD array lidar with respect to all pixels, to obtain two cumulative detection result histograms of the Gm-APD array lidar; determining a range interval of the imaging target according to the two cumulative detection result histograms; and acquiring a lidar image by a peak discrimination method in the range interval of the imaging target. The Gm-APD an-ay lidar imaging method according to the present disclosure is capable of improving the laser image quality by eliminating the interference of strong background noise in other range intervals.
19
CN112285675A
飞行时间量测电路及相关芯片及电子装置
Substantial Examination
Publication/Patent Number: CN112285675A Publication Date: 2021-01-29 Application Number: 202011472172.0 Filing Date: 2020-12-15 Inventor: 林奇青   范铨奇   杨富强   Assignee: 深圳市汇顶科技股份有限公司   IPC: G01S7/4863 Abstract: 本申请公开了一种飞行时间量测电路、相关芯片及电子装置。飞行时间量测电路包括像素阵列,其中至少一像素单元包括:光敏传感器(D01),其在感测到光子后具有一段停滞时间无法进行感测;与门(A01),其第一输入端耦接至光敏传感器,其第二输入端耦接至行选择线(11RS0),其第三输入端耦接至列选择线(11CS1);以及锁存电路(L01),其输入端耦接至与门的输出端;或门(G01),其第一输入端耦接至与门的输出端,其第二输入端耦接至行移动控制线(S0);复用器(M01),其第一输入端耦接至预设电压(0),其第二输入端耦接至前一行且同一列的像素单元的输出端;异或门(X01),其第一输入端耦接至锁存电路的输出端,其第二输入端耦接至复用器的输出端。
20
US10965379B2
Coherent receiver for free space optical communications and lidar
Publication/Patent Number: US10965379B2 Publication Date: 2021-03-30 Application Number: 16/706,233 Filing Date: 2019-12-06 Inventor: Brown, William J.   Clark, Hannah   Palmer, Miles R.   Assignee: 8 RIVERS CAPITAL, LLC.   IPC: H04B10/61 Abstract: An optical receiver is provided that includes a detector array of multiple detector elements, and processing circuits coupled to the multiple detector elements. The detector array is configured to receive light from an external source, mix the light with light from a local oscillator to generate a spatial fringe across the detector array. The multiple detector elements are configured to convert respective portions of the spatial fringe incident on the multiple detector elements to corresponding electrical signals. The processing circuits are configured to process the electrical signals. This includes the processing circuits configured to sum those of the corresponding electrical signals from one or more of the multiple detectors, and subtract the sum from a second sum of those of the corresponding electrical signals from one or more other of the multiple detectors.
Total 21 pages