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公开(公告)号：US11909332B2
公开(公告)日：2024-02-20
申请号：US17395314
申请日：2021-08-05
发明人： Qin Zhou , Youmin Wang , Yue Lu , Lingkai Kong
CPC分类号： H02N1/008 , B81B3/0021 , B81B3/0043 , B81B7/008 , H02P25/00 , B81B2201/033 , H02N1/08
摘要： Embodiments of the disclosure provide a comb drive, a comb drive system, and a method of operating the comb drive to rotate bi-directionally in a MEMS environment. An exemplary comb drive system may include a comb drive, at least one power source, and a controller. The comb drive may include a stator comb having a first electrically conductive layer spaced apart from a second electrically conductive layer. The comb drive may also include a rotor comb having a first electrically conductive layer spaced apart from a second electrically conductive layer. The controller may be configured to apply first and second voltage levels having opposite polarities to the first and second electrically conductive layers of the rotor comb, respectively. The controller may also be configured to apply an intermediate voltage level to one of the first or second electrically conductive layers of the stator comb.
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公开(公告)号：US11656339B2
公开(公告)日：2023-05-23
申请号：US16290782
申请日：2019-03-01
发明人： Zuow-Zun Chen , Jihua Li , Lingkai Kong , Youmin Wang , Yue Lu , Quin Zhou
IPC分类号： G01S7/481 , G02B26/08 , G01S7/484 , G02B26/10 , G01S17/931
CPC分类号： G01S7/4817 , G01S7/484 , G01S17/931 , G02B26/0841 , G02B26/10
摘要： Apparatuses and methods for controlling a micro-mirror are provided. In one example, a controller is coupled with a micro-mirror assembly comprising a micro-mirror, an actuator, and a sensor. The controller is configured to: receive a reference signal including information of a target oscillatory rotation of the micro-mirror; receive, from the sensor, the measurement signal of an oscillatory rotation of the micro-mirror; determine, based on the measurement signal and the information included in the reference signal, a difference between the oscillatory rotation of the micro-mirror and the target oscillatory rotation; receive an input control signal; generate, based on the difference and the input control signal, an output control signal to control at least one of a phase or an amplitude of the oscillatory rotation of the micro-mirror; and transmit the output control signal to the actuator.
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公开(公告)号：US11510297B2
公开(公告)日：2022-11-22
申请号：US16231823
申请日：2018-12-24
发明人： Yue Lu , Yibo Yu , Yang Yang , Lingkai Kong , Youmin Wang , Zuow-Zun Chen
IPC分类号： H04B10/564 , H05B45/44 , H01S5/042 , H05B45/10 , H05B45/37 , H01S5/02325 , H04B10/524 , H04B10/50 , G01S17/42
摘要： Embodiments of the disclosure provide control systems and methods for controlling a pulsed laser diode and a sensing device including a pulsed laser diode. An exemplary control system includes a distance detector configured to generate a distance signal indicating a distance between the pulsed laser diode and an object reflecting pulsed laser beams emitted by the pulsed laser diode. The control system may also include a controller configured to dynamically control power supplied to the pulse laser diode based on the distance signal.
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公开(公告)号：US11500196B2
公开(公告)日：2022-11-15
申请号：US16869513
申请日：2020-05-07
发明人： Anan Pan , Henghui Jiang , Qin Zhou , Lingkai Kong
摘要： Disclosed herein are techniques for improving structural stability and duration of light beam steering components in a LiDAR system. A galvo mirror assembly for light detection and ranging includes a top bracket including a first rotatable unit configured to rotate around an axis; a bottom bracket aligned with the top bracket and including a second rotatable unit configured to rotate around the axis; a mirror including a top end and a bottom end, where the top end of the mirror is coupled to the first rotatable unit of the top bracket and the bottom end of the mirror is coupled to the second rotatable unit of the bottom bracket, such that the mirror is rotatable around the axis; and an enhance plate extending between and non-rotatably coupled to the top bracket and the bottom bracket. The enhance plate is spaced apart from the mirror.
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公开(公告)号：US20220206115A1
公开(公告)日：2022-06-30
申请号：US17137224
申请日：2020-12-29
发明人： Vipul Chawla , Lingkai Kong , Yue Lu , John K. Wu
IPC分类号： G01S7/484 , G01S17/10 , G01S17/931
摘要： In one example, an apparatus is provided. The apparatus is part of a Light Detection and Ranging (LiDAR) module and comprises a transmitter circuit, a receiver circuit, and a controller. The receiver circuit comprises a photodetector configured to convert a light signal into a photocurrent signal. The controller is configured to: transmit, using the transmitter circuit, a first light signal; receive, using the photodetector of the receiver circuit, a second light signal; determine whether the second light signal includes a scatter signal coupled from the transmitter circuit, and a reflected first light signal; and based on whether the second light signal includes the scatter signal and the reflected first light signal, determine a time-of-flight of the first light signal based on one of: a width of the second light signal, or a time difference between the transmission of the first light signal and the reception of the second light signal.
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公开(公告)号：US11280888B2
公开(公告)日：2022-03-22
申请号：US17033917
申请日：2020-09-27
发明人： Vipul Chawla , Yue Lu , Lingkai Kong
IPC分类号： G01S7/486 , G01S7/4863 , H03F3/45
摘要： 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.
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公开(公告)号：US20210373128A1
公开(公告)日：2021-12-02
申请号：US16886593
申请日：2020-05-28
发明人： Chao Wang , Lingkai Kong , Yonghong Guo , Wenbin Zhu
IPC分类号： G01S7/48 , G01S17/931 , G01S7/481
摘要： Embodiments of the disclosure provide receivers for light detection and ranging (LiDAR). In an example, a receiver includes a beam converging device and an EO beam deflecting unit. The beam converging device is configured to receive a laser beam from an object being scanned by the LiDAR and form an input laser beam. The EO beam deflecting unit is configured to generate a non-uniform medium having at least one of a refractive index gradient or a diffraction grating, receive the input laser beam such that the input laser beam impinges upon the non-uniform medium, and form an output laser beam towards a photosensor. An angle between the input and the output laser beams is nonzero.
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公开(公告)号：US20210367536A1
公开(公告)日：2021-11-25
申请号：US17395314
申请日：2021-08-05
发明人： Qin Zhou , Youmin Wang , Yue Lu , Lingkai Kong
摘要： Embodiments of the disclosure provide a comb drive, a comb drive system, and a method of operating the comb drive to rotate bi-directionally in a MEMS environment. An exemplary comb drive system may include a comb drive, at least one power source, and a controller. The comb drive may include a stator comb having a first electrically conductive layer spaced apart from a second electrically conductive layer. The comb drive may also include a rotor comb having a first electrically conductive layer spaced apart from a second electrically conductive layer. The controller may be configured to apply first and second voltage levels having opposite polarities to the first and second electrically conductive layers of the rotor comb, respectively. The controller may also be configured to apply an intermediate voltage level to one of the first or second electrically conductive layers of the stator comb.
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公开(公告)号：US11175385B2
公开(公告)日：2021-11-16
申请号：US16103922
申请日：2018-08-14
发明人： Chao Wang , Youmin Wang , Yue Lu , Lingkai Kong
IPC分类号： G01C3/08 , G01S7/484 , H01S3/23 , H01S3/00 , G02F1/35 , G02F1/355 , G02F1/37 , G01S7/481 , H01S3/067
摘要： Embodiments of the disclosure provide an apparatus for emitting laser light and a system and method for detecting laser light returned from an object. The system includes a transmitter and a receiver. The transmitter includes one or more laser sources, at least one of the laser sources configured to provide a respective native laser beam having a wavelength above 1,100 nm. The transmitter also includes a wavelength converter configured to receive the native laser beams provided by the laser sources and convert the native laser beams into a converted laser beam having a wavelength below 1,100 nm. The transmitter further includes a scanner configured to emit the converted laser beam to the object in a first direction. The receiver is configured to detect a returned laser beam having a wavelength below 1,100 nm and returned from the object in a second direction.
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公开(公告)号：US20210349192A1
公开(公告)日：2021-11-11
申请号：US16869403
申请日：2020-05-07
发明人： Youmin Wang , Yonghong Guo , Anan Pan , Yue Lu , Lingkai Kong
IPC分类号： G01S7/4863 , G01S7/481 , G01S17/931
摘要： A light detection and ranging system includes a receiver that includes a first photodetector configured to detect individual photons, a second photodetector characterized by a linear response to an intensity level of incident light, and a receiver optic device. The receiver optic device collects returned light from a first field of view and a second field of view of the receiver, directs the returned light from the first field of view of the receiver to the first photodetector, and directs the returned light from the second field of view of the receiver to the second photodetector.
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