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公开(公告)号：US20210382172A1
公开(公告)日：2021-12-09
申请号：US16896725
申请日：2020-06-09
Inventor： Neale DUTTON , Christopher TOWNSEND
Abstract: Disclosed herein is a time of flight sensing module that includes a reflected laser light detector formed on a printed circuit board, and a plurality of laser modules positioned about a periphery of the reflected laser light detector. Each laser module includes an interposer substrate vertically spaced apart from the printed circuit board, at least one laser diode carried by the interposer substrate, and a diffuser spaced apart from the interposer substrate and over the at least one laser diode. A lens may be positioned over the reflected laser light detector, and the plurality of laser modules are positioned about the periphery of the lens.
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公开(公告)号：US11187837B2
公开(公告)日：2021-11-30
申请号：US16594742
申请日：2019-10-07
Inventor： Kevin Channon , James Peter Drummond Downing , Andy Price
Abstract: Various embodiments provide an optical lens that includes wafer level diffractive microstructures. In one embodiment, the optical lens includes a substrate, a microstructure layer having a first refractive index, and a protective layer having a second refractive index that is different from the first refractive index. The microstructure layer is formed on the substrate and includes a plurality of diffractive microstructures. The protective layer is formed on the diffractive microstructures. The protective layer provides a cleanable surface and encapsulates the diffractive microstructures to prevent damage and contamination to the diffractive microstructures. In another embodiment, the optical lens includes a substrate and an anti-reflective layer. The anti-reflective layer is formed on the substrate and includes a plurality of diffractive microstructures.
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公开(公告)号：US20210364352A1
公开(公告)日：2021-11-25
申请号：US17392422
申请日：2021-08-03
Inventor： Mohammed AL-RAWHANI , Bruce RAE
IPC: G01J1/44
Abstract: A single photon avalanche diode (SPAD) has a cathode coupled to a high voltage supply and an anode coupled to a first node. A photodetection circuit includes: a first n-channel transistor having a drain coupled to the first node, a source coupled to ground, and a gate coupled to a third node; a second n-channel transistor having a drain coupled to the first node, a source coupled to ground, and a gate coupled to a second node; and an inverter having an input coupled to the first node and an output coupled to an intermediate node. A current starved inverter has an input coupled to the intermediate node and an output coupled to the second node, a logic gate has inputs coupled to the intermediate node and the second node, and an output coupled to the third node.
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公开(公告)号：US11162839B2
公开(公告)日：2021-11-02
申请号：US17071326
申请日：2020-10-15
Inventor： Mohammed Al-Rawhani , Bruce Rae
Abstract: A photodetection circuit includes a single photon avalanche diode (SPAD) having a cathode coupled to a high voltage supply through a quench resistance and an anode coupled to a first node, a capacitive deep trench isolation capacitor coupled between the first node and ground, and a first n-channel transistor. The first n-channel transistor has a drain coupled to the first node, a source coupled to ground, and a gate coupled to a resistance control signal. A second n-channel transistor has a drain coupled to the first node, a source coupled to ground, and a gate coupled to a second node. An inverter has an input coupled to the first node and an output coupled to an intermediate node. A current starved inverter has an input coupled to the intermediate node and an output coupled to the second node.
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公开(公告)号：US11095289B2
公开(公告)日：2021-08-17
申请号：US15588127
申请日：2017-05-05
Inventor： Bruce Rae , Neale Dutton
IPC: G01C3/08 , H03K19/17764 , H03K19/20 , H04N5/225
Abstract: An electronic device includes at least one photodetection block, where the at least one photodetection block includes a plurality of macropixels arranged into an array. Each macropixel includes an array of photodiodes, with logic circuitry coupled to outputs of the array of photodiodes and configured to generate a detection signal as a function of logically combining the outputs of the array of photodiodes. Each macropixel has associated therewith selection circuitry configured to selectively pass the detection signal to output combining logic or to output combining logic of at least one neighboring macropixel of the plurality thereof. The output combining logic has inputs coupled to the selection circuitry and to the selection circuitry of the at least one neighboring macropixel, and is configured to generate an output detection signal as a function of logically combining outputs of the selection circuitry and the selection circuitry of the at least one neighboring macropixel.
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Patent Agency Ranking
公开(公告)号：US20210223562A1
公开(公告)日：2021-07-22
申请号：US16746670
申请日：2020-01-17
Inventor： Thineshwaran GOPAL KRISHNAN , Christopher TOWNSEND
Abstract: The present disclosure is directed to an electronic device including a sensor having a transmission module configured to provide a plurality of collimated light beams. The transmission module includes a light source and a transmission beam splitter. The transmission beam splitter includes a plurality of lenslets. The transmission beam splitter is configured to receive one or more light beams from the light source and refract the one or more light beams for forming the plurality of collimated light beams.
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公开(公告)号：US20210167240A1
公开(公告)日：2021-06-03
申请号：US17172636
申请日：2021-02-10
Inventor： Thineshwaran GOPAL KRISHNAN , Roy DUFFY
IPC: H01L31/107 , G02B27/30 , G01S17/89 , F21V8/00 , G02B27/09
Abstract: A transmit integrated circuit includes a light source configured to generate a beam of light. A receive integrated circuit includes a first photosensor. A transmit optic is mounted over the transmit and receive integrated circuits. The transmit optic is formed by a prismatic light guide and is configured to receive the beam of light. An annular body region of the transmit optic surrounds a central opening which is aligned with the first photosensor. The annular body region includes a first reflective surface defining the central opening and further includes a ring-shaped light output surface surrounding the central opening. Light is output from the ring-shaped light output surface in response to light which propagates within the prismatic light guide in response to the received beam of light and which reflects off the first reflective surface.
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公开(公告)号：US10996323B2
公开(公告)日：2021-05-04
申请号：US15902609
申请日：2018-02-22
Inventor： Sarrah Moiz Patanwala , Neale Dutton
IPC: G01C3/08 , G01S7/4863 , G01S17/14 , G01S17/894 , G01S17/931
Abstract: A time-of-flight (TOF) imaging system includes illumination circuitry, such as a laser, one or more sensors, such as SPAD arrays, and image processing circuitry. The illumination circuitry illuminates one or more objects in an environment around the TOF imaging system. The sensors generate an image data stream based on reflections from the one or more illuminated objects, and possibly based on reflections from one or more reflectors. The image processing circuitry generates counts associated with distances based on the image data stream and possibly a reflection data stream and stores the generated counts in a histogram using a plurality of bins. Each of the plurality of bins stores counts associated with a respective distance range. A size of a bin in the plurality of bins is a function of the respective distance range, and may be based on a logarithmic function of the distance associated with the bin.
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39.发明申请公开(公告)号：US20210111296A1
公开(公告)日：2021-04-15
申请号：US17129422
申请日：2020-12-21
Inventor： Laurence Stark
IPC: H01L31/107 , H01L31/02 , H01L31/0352 , H01L31/103 , H01L31/18 , H01L29/72
Abstract: An embodiment method of manufacturing an avalanche diode includes forming a first trench in a substrate material, filling the first trench with a first material that comprises a dopant, and causing the dopant to diffuse from the first trench to form part of a PN junction. An avalanche diode array can be formed to include a number of the avalanche diodes.
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公开(公告)号：US20210080576A1
公开(公告)日：2021-03-18
申请号：US17091153
申请日：2020-11-06
Inventor： John Kevin MOORE , Neale DUTTON , Jeffrey M. RAYNOR
IPC: G01S17/26 , G01S17/89 , G01S7/4865 , G01C3/08 , G01S17/36
Abstract: A distance from an apparatus to at least one object is determined by generating a first signal and generating light modulated by the first signal to be emitted from the apparatus. Light reflected by the at least one object is detected using a Time-of-flight detector array, wherein each array element of the Time-of-flight detector array generates an output signal from a series of photon counts over a number of consecutive non-overlapping time periods. The output signals are compared to the first signal to determine at least one signal phase difference. From this at least one signal phase difference a distance from the apparatus to the at least one object is determined.
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