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公开(公告)号：US20200116835A1
公开(公告)日：2020-04-16
申请号：US16714670
申请日：2019-12-13
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yibing Michelle WANG
IPC: G01S7/4863 , G01S7/4865 , G01S17/10 , G01S17/89
Abstract: A time-resolving sensor includes a single-photon avalanche diode (SPAD), a logic circuit and differential time-to-charge converter (DTCC) circuit. The SPAD is responsive to a shutter signal to generate an output signal based on detecting an incident photon. The logic circuit generates first and second enable signals. The DTCC includes a capacitor device, first and second switching devices, and an output circuit. The first switching device is responsive to the first enable signal to transfer a charge on the capacitor device to the first floating diffusion. The second switching device is responsive to the second enable signal to transfer a remaining charge on the capacitor device to the second floating diffusion. The output circuit outputs a first voltage that is based on the first charge on the first floating diffusion and a second voltage that is based on the second charge on the second floating diffusion.
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公开(公告)号：US20200033456A1
公开(公告)日：2020-01-30
申请号：US16140529
申请日：2018-09-24
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yibing Michelle WANG , Lilong SHI , Ilia OVSIANNIKOV
Abstract: An image sensor includes a time-resolving sensor and a processor. The time-resolving sensor outputs a first signal and a second signal pair in response detecting one or more photons that have been reflected from an object. A first ratio of a magnitude of the first signal to a sum of the magnitude of the first signal and a magnitude of the second signal is proportional to a time of flight of the one or more detected photons. A second ratio of the magnitude of the second signal to the sum of the magnitude of the first signal and the magnitude of the second signal is proportional to the time of flight of the one or more detected photons. The processor determines a surface reflectance of the object where the light pulse has been reflected based on the first signal and the second signal pair and may generate a grayscale image.
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53.发明申请公开(公告)号：US20190281276A1
公开(公告)日：2019-09-12
申请号：US16422944
申请日：2019-05-24
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yibing Michelle WANG , Lilong SHI , Ilia OVSIANNIKOV
IPC: H04N13/254 , G01S7/486 , G01S17/10 , G01S17/89 , H04N5/3745 , H04N5/369 , H04N5/378
Abstract: A Time-of-Flight (TOF) technique is combined with analog amplitude modulation within each pixel in a pixel array using multiple Single Photon Avalanche Diodes (SPADs) in conjunction with a single Pinned Photo Diode (PPD) in each pixel. A SPAD may be shared among multiple neighboring pixels. The TOF information is added to the received light signal by the analog domain-based single-ended to differential converter inside the pixel itself. The spatial-temporal correlation among outputs of multiple, adjacent SPADs in a pixel is used to control the operation of the PPD to facilitate recording of TOF values and range of an object. Erroneous range measurements due to ambient light are prevented by stopping the charge transfer from the PPD—and, hence, recording a TOF value—only when two or more SPADs in the pixel are triggered within a pre-defined time interval. An autonomous navigation system with multi-SPAD pixels provides improved vision for drivers under difficult driving conditions.
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公开(公告)号：US20190187256A1
公开(公告)日：2019-06-20
申请号：US15920430
申请日：2018-03-13
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yibing Michelle WANG
CPC classification number: G01S7/4863 , G01S17/10 , G01S17/89 , G01S17/936 , H01L27/14645 , H01L27/14649
Abstract: A Direct Time-of-Flight (DTOF) technique is combined with analog amplitude modulation within each pixel in a pixel array. No Single Photon Avalanche Diodes (SPADs) or Avalanche Photo Diodes (APDs) are used. Instead, each pixel has a Photo Diode (PD) with a conversion gain of over 400 μV/e− and Photon Detection Efficiency (PDE) of more than 45%, operating in conjunction with a Pinned Photo Diode (PPD). The TOF information is added to the received light signal by the analog domain-based single-ended to differential converter inside the pixel itself. The output of the PD in a pixel is used to control the operation of the PPD. The charge transfer from the PPD is stopped—and, hence, TOF value and range of an object are recorded—when the output from the PD in the pixel is triggered within a pre-defined time interval. Such pixels provide for an improved autonomous navigation system for drivers.
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55.发明申请公开(公告)号：US20190056500A1
公开(公告)日：2019-02-21
申请号：US15807334
申请日：2017-11-08
Applicant: Samsung Electronics Co., Ltd.
Inventor： Lilong SHI , Yibing Michelle WANG
CPC classification number: G01S17/42 , G01S7/4811 , G01S7/4865 , G01S17/10 , G01S17/66 , G01S17/88 , G01S17/89
Abstract: A method is disclosed to determine a traveling time for a plurality of received light pulses that reflected and returned from an object. Each returned light pulse is associated with a timestamp indicating a time between a transmission time of a corresponding light pulse and a time of arrival of the returned light pulse. For each timestamp, a number C is determined of time stamps that are subsequent to the timestamp and within a predetermined time window after the timestamp. A maximum number C is determined, and an index i is determined for the maximum number C. A traveling time is determined for the plurality of light pulses as an average of the timestamp having a same index as the maximum number C and timestamps that are within the predetermined time window after the timestamp having the same index as the maximum number C.
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Patent Agency Ranking
56.发明申请公开(公告)号：US20180338127A1
公开(公告)日：2018-11-22
申请号：US15657101
申请日：2017-07-21
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yibing Michelle WANG , Lilong SHI , Ilia OVSIANNIKOV
Abstract: A Time-of-Flight (TOF) technique is combined with analog amplitude modulation within each pixel in a pixel array using multiple Single Photon Avalanche Diodes (SPADs) in conjunction with a single Pinned Photo Diode (PPD) in each pixel. A SPAD may be shared among multiple neighboring pixels. The TOF information is added to the received light signal by the analog domain-based single-ended to differential converter inside the pixel itself. The spatial-temporal correlation among outputs of multiple, adjacent SPADs in a pixel is used to control the operation of the PPD to facilitate recording of TOF values and range of an object. Erroneous range measurements due to ambient light are prevented by stopping the charge transfer from the PPD—and, hence, recording a TOF value—only when two or more SPADs in the pixel are triggered within a pre-defined time interval. An autonomous navigation system with multi-SPAD pixels provides improved vision for drivers under difficult driving conditions.
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公开(公告)号：US20180217261A1
公开(公告)日：2018-08-02
申请号：US15498096
申请日：2017-04-26
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yibing Michelle WANG
CPC classification number: G01S17/89 , G01S7/4861 , G01S7/4865 , G01S17/10 , H04N13/204 , H04N13/254 , H04N13/271
Abstract: An apparatus and a method. The apparatus includes a single-photon avalanche diode (SPAD) circuit configured to detect a photon, including a first input for receiving a first voltage (VSPAD), a second input for receiving a first signal (SHUTTER), a third input for receiving a second voltage (VDD), and an output; a logic circuit configured to latch the detected photon, including a first input connected to the output of the SPAD circuit, a second input for receiving a second signal (TXRMD), and an output; and a pinned photo diode (PPD) circuit configured to record a time of flight (TOF) of the detected photon, including a first input connected to the output of the logic circuit, a second input for receiving a third signal (VTX), a third input for receiving a fourth signal (RST), a fourth input for receiving a third voltage (VPIX), a fifth input for receiving a fifth signal (SEL), and an output.
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公开(公告)号：US20180174323A1
公开(公告)日：2018-06-21
申请号：US15458016
申请日：2017-03-13
Applicant: Samsung Electronics Co., Ltd.
Inventor： Zhengping JI , Lilong SHI , Yibing Michelle WANG , Hyun Surk RYU , Ilia OVSIANNIKOV
CPC classification number: G06T7/74 , G06T2207/10028 , G06T2207/30244
Abstract: A Dynamic Vision Sensor (DVS) pose-estimation system includes a DVS, a transformation estimator, an inertial measurement unit (IMU) and a camera-pose estimator based on sensor fusion. The DVS detects DVS events and shapes frames based on a number of accumulated DVS events. The transformation estimator estimates a 3D transformation of the DVS camera based on an estimated depth and matches confidence-level values within a camera-projection model such that at least one of a plurality of DVS events detected during a first frame corresponds to a DVS event detected during a second subsequent frame. The IMU detects inertial movements of the DVS with respect to world coordinates between the first and second frames. The camera-pose estimator combines information from a change in a pose of the camera-projection model between the first frame and the second frame based on the estimated transformation and the detected inertial movements of the DVS.
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公开(公告)号：US20170278221A1
公开(公告)日：2017-09-28
申请号：US15148657
申请日：2016-05-06
Applicant: Samsung Electronics Co., Ltd.
Inventor： Zhengping JI , Kyoobin LEE , Qiang ZHANG , Yibing Michelle WANG , Hyun Surk RYU , Ilia OVSIANNIKOV
CPC classification number: G06T5/002 , G06F3/00 , G06K9/00 , G06T5/50 , G06T7/80 , G06T2207/10016 , G06T2207/20076 , G06T2207/20182 , H04N5/217 , H04N5/357
Abstract: An apparatus and a method. The apparatus includes an image representation unit configured to receive a sequence of frames generated from events sensed by a dynamic vision sensor (DVS) and generate a confidence map from non-noise events; and an image denoising unit connected to the image representation unit and configured to denoise an image in a spatio-temporal domain. The method includes receiving, by an image representation unit, a sequence of frames generated from events sensed by a DVS, and generating a confidence map from non-noise events; and denoising, by an image denoising unit connected to the image representation unit, images formed from the frames in a spatio-temporal domain.
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60.发明申请公开(公告)号：US20170097417A1
公开(公告)日：2017-04-06
申请号：US14992671
申请日：2016-01-11
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yibing Michelle WANG
IPC: G01S17/08
CPC classification number: G01S17/08 , G06F1/04 , H03K3/012 , H03K3/0372 , H03K3/356052 , H03K3/356147 , H03K17/30 , H03K19/0013 , H03K19/0016
Abstract: A range sensor and a method thereof. The range sensor includes a light source configured to project a sheet of light at an angle within a field of view (FOV); an image sensor offset from the light source; collection optics; and a controller connected to the light source, the image sensor, and the collection optics, and configured to determine a range of a distant object based on direct time-of-flight and determine a range of a near object based on triangulation. The method includes projecting, by a light source, a sheet of light at an angle within an FOV; offsetting an image sensor from the light source; collecting, by collection optics, the sheet of light reflected off objects; and determining, by a controller connected to the light source, the image sensor, and the collection optics, a range of a distant object based on direct time-of-flight and a range of a near object based on triangulation simultaneously.
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