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公开(公告)号：US20230367018A1
公开(公告)日：2023-11-16
申请号：US18357546
申请日：2023-07-24
申请人： TOPPAN Inc.
IPC分类号： G01S17/894 , G01S7/4865 , G01S17/10
CPC分类号： G01S17/894 , G01S7/4865 , G01S17/10
摘要： A range imaging device includes a light source unit, a light-receiving unit, and a range image processing unit that computes a distance to an object. The range image processing unit performs multiple measurements different in relative timing relationship between an emission timing and an accumulation timing, extracts a feature amount based on the amounts of charge accumulated at the measurements, determines whether reflection light of a light pulse has been received by pixels in a single path or via multipath propagation, based on tendency of the extracted feature amount, and calculates the distance to the object present in a measurement space in accordance with a result of the determination.
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公开(公告)号：US20230358863A1
公开(公告)日：2023-11-09
申请号：US18351658
申请日：2023-07-13
申请人： TOPPAN Inc.
IPC分类号： G01S7/4863 , G01S17/10
CPC分类号： G01S7/4863 , G01S17/10
摘要： A range imaging device including: a light source unit; a light receiving unit that includes a pixel and a pixel driving circuit, the pixel including a photoelectric conversion device and three or more charge storage units; and a range image processing unit. To cause charge corresponding to reflected light of a light pulse reflected by an object to be distributed to and stored in two of the charge storage units, the range image processing unit performs control so that the charge corresponding to the reflected light is stored in the two of the charge storage units for different reflected light storage times in a single frame period according to an intensity of the reflected light.
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公开(公告)号：US20230412934A1
公开(公告)日：2023-12-21
申请号：US18460743
申请日：2023-09-05
申请人： TOPPAN Inc.
发明人： Yu OOKUBO , Tomohiro NAKAGOME , Kunihiro HATAKEYAMA , Hiroshige GOTO , Satoshi TAKAHASHI , Yasuyuki HITSUOKA
摘要： A range imaging device includes a light source unit that emits light pulses to a measurement space; a light-receiving unit including a photoelectric conversion element that generates charge according to light incident from the space, a pixel circuit including charge storage units in which the charge is integrated in a frame cycle, and a pixel drive circuit that performs switching operation of transfer transistors to distribute the charge to the storage units for integration at integration timing synchronizing with emission of the pulses; and a distance calculation unit that calculates a distance between object in the space and the light-receiving unit based on charge determined by a first charge integrated in each storage unit. The calculation unit calculates the distance by subtracting a second charge from each first charge, the second charge being noise charge as an integrated charge other than the charge distributed and integrated by the switching operation.
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公开(公告)号：US20230366990A1
公开(公告)日：2023-11-16
申请号：US18356267
申请日：2023-07-21
申请人： TOPPAN Inc.
IPC分类号： G01S7/4861 , G01S17/894 , G01S7/4865
CPC分类号： G01S7/4861 , G01S17/894 , G01S7/4865
摘要： A range imaging device includes a light-receiving unit including at least one pixel circuit including a photoelectric conversion element that generates charge in response to incident light, N (N≥3) charge storage units that integrate charge in a frame cycle, and transfer transistors, and a pixel drive circuit that causes the transfer transistors to distribute charge to the charge storage units with integration timing synchronizing with light pulses, a light source unit that emits light pulses; a range image processing unit that calculates a distance to an object based on integrated charges, and a measurement control unit that calculates a thinning time of not integrating charge, according to integrated charge in the charge storage units, the distance, and intensity of the incident light. The measurement control unit controls integration of charge with a thinning time set in a measurement zone corresponding to the distance from the light-receiving unit.
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公开(公告)号：US20230358889A1
公开(公告)日：2023-11-09
申请号：US18354845
申请日：2023-07-19
申请人： TOPPAN Inc.
发明人： Yu OOKUBO , Satoshi TAKAHASHI
IPC分类号： G01S17/89 , G01S17/42 , G01S7/484 , G01S7/4865 , G01S7/48
CPC分类号： G01S17/89 , G01S17/42 , G01S7/484 , G01S7/4865 , G01S7/4808
摘要： A range imaging device includes: a light-receiving unit including a pixel circuit, and a pixel drive circuit that causes transfer transistors to distribute charge to charge storage units, the pixel circuit including a photoelectric conversion element that generates charge in response to incident light, N (N≥3) charge storage units that integrates charge in frame cycle, and the transistors that transfer charge to the storage units from the conversion element; a light source that emits light pulses; a range image processing unit that calculates a measurement distance to an object based on the integrated charge in the storage units; and a measurement control unit that calculates integration time with which charge is integrated in the storage units, according to the integrated charge, distance, and intensity of incident light. The control unit decrements the time by a first unit until the integrated charge becomes equal to or smaller than a first threshold.
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公开(公告)号：US20220146684A1
公开(公告)日：2022-05-12
申请号：US17586447
申请日：2022-01-27
IPC分类号： G01S17/894 , H04N5/235 , H04N5/225 , G01S17/10
摘要： A light source unit that emits a light pulse, a light receiving unit that includes pixels each including a photoelectric conversion device generating electric charge according to incident light and a plurality of electric charge accumulating units accumulating the electric charge and a pixel driving circuit that distributes the electric charge to the electric charge accumulating units of the pixels to be accumulated therein at a predetermined accumulation timing synchronized with the emission of the light pulse, and a distance image processing unit that measures the distance to a subject present in the measurement space on the basis of amounts of electric charge accumulated in the electric charge accumulating units are included, and the distance image processing unit includes a timing control unit that controls the accumulation timing in accordance with a measurement mode set in advance in accordance with a range of distances that are measurement targets.
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公开(公告)号：US20230367016A1
公开(公告)日：2023-11-16
申请号：US18356396
申请日：2023-07-21
申请人： TOPPAN Inc.
IPC分类号： G01S17/89 , G01S17/10 , G01S7/484 , G01S7/4865 , G01S7/48
CPC分类号： G01S17/89 , G01S7/4808 , G01S7/484 , G01S7/4865 , G01S17/10
摘要： A range imaging device includes a light-receiving unit including a pixel circuit including a photoelectric conversion element that generates charge according to incident light and N (N≥3) charge storage units that integrate charge in frame cycle, and a pixel drive circuit that turns on or off transfer transistors that transmit charge to the charge storage units at integration timing synchronizing with light pulses to distribute and integrate charge; a light source that emits light pulses; a range image processing unit that calculates a distance to object based on charge integrated in the charge storage units; and a measurement control unit that determines measurement zone to which the measurement distance belongs and which is set according to zone threshold set according to distance, integrates charge according to integration time set in the zone, and emits light pulses by increasing pulse period of light pulses according to increase of the integration time.
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