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1.发明申请公开(公告)号：US20220066035A1
公开(公告)日：2022-03-03
申请号：US17007491
申请日：2020-08-31
Applicant: PixArt Imaging Inc.
Inventor： Yueh-Lin CHUNG , Tso-Sheng TSAI
IPC: G01S17/36 , G01S7/4911 , G01S7/4913 , G01S7/4915
Abstract: There is provided a distance measurement device including a light source, a light detector, a time control circuit and a processor. In first measurement, the time control circuit controls the light source to illuminate at a low modulation frequency, and the processor calculates a rough flying time according to a first detection signal of the light detector to determine an operating phase zone and a delay time. In second measurement, the time control circuit controls the light source to illuminate at a high modulation frequency and causes a light driving signal of the light source and a detecting control signal of the light detector to have a difference of the delay time, and the processor calculates a fine flying time according to a second detection signal of the light detector.
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公开(公告)号：US20200244906A1
公开(公告)日：2020-07-30
申请号：US16258673
申请日：2019-01-28
Applicant: PixArt Imaging Inc.
Inventor： Tso-Sheng TSAI
IPC: H04N5/378 , H04N5/374 , H01L27/146
Abstract: There is provided an image sensor employing an avalanche diode. The image sensor includes a plurality of pixel circuits arranged in a matrix, a plurality of pulling circuits and a global current source circuit. Each of the plurality of pixel circuits includes a single photon avalanche diode and four P-type or N-type transistors. Each of the plurality of pulling circuits is arranged corresponding to one pixel circuit column. The global current source circuit is used to form a current mirror with each of the plurality of pulling circuits.
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公开(公告)号：US20220026545A1
公开(公告)日：2022-01-27
申请号：US16936777
申请日：2020-07-23
Applicant: PixArt Imaging Inc.
Inventor： Tso-Sheng TSAI , Yueh-Lin CHUNG , Shin-Lin WANG
IPC: G01S7/497 , G01S17/10 , G01S7/4865 , G01S7/481
Abstract: There is provided a time of flight sensor including a light source, a first pixel, a second pixel and a processor. The first pixel generates a first output signal without receiving reflected light from an external object illuminated by the light source. The second pixel generates a second output signal by receiving the reflected light from the external object illuminated by the light source. The processor calculates deviation compensation and deviation correction associated with temperature variation according to the first output signal to accordingly calibrate a distance calculated according to the second output signal.
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公开(公告)号：US20200275044A1
公开(公告)日：2020-08-27
申请号：US16872626
申请日：2020-05-12
Applicant: PIXART IMAGING INC.
Inventor： Tso-Sheng TSAI
IPC: H04N5/378 , H01L27/146 , H04N5/374
Abstract: There is provided an image sensor employing an avalanche diode. The image sensor includes a plurality of pixel circuits arranged in a matrix, a plurality of pulling circuits and a global current source circuit. Each of the plurality of pixel circuits includes a single photon avalanche diode and four P-type or N-type transistors. Each of the plurality of pulling circuits is arranged corresponding to one pixel circuit column. The global current source circuit is used to form a current mirror with each of the plurality of pulling circuits.
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公开(公告)号：US20240036209A1
公开(公告)日：2024-02-01
申请号：US17878057
申请日：2022-08-01
Applicant: PIXART IMAGING INC.
Inventor： Tso-Sheng TSAI , Yueh-Lin CHUNG
IPC: G01S17/894 , G01S7/4865 , G01S7/481
CPC classification number: G01S17/894 , G01S7/4866 , G01S7/4816
Abstract: There is provided an optical sensor including a light source, a first pixel, a second pixel and a processor. The first pixel generates a first output signal by receiving reflected light from an external object illuminated by the light source. The second pixel generates a second output signal by receiving reflected light from an inner surface of a package illuminated by the light source. The processor generates a random code according to the second output signal to modulate the light source, identifies whether to change an emission pattern of the light source according to a distance calculated according to the first output signal, and changes exposure intervals of the first pixel and the second pixel.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20230288564A1
公开(公告)日：2023-09-14
申请号：US18198814
申请日：2023-05-17
Applicant: PixArt Imaging Inc.
Inventor： Yueh-Lin CHUNG , Tso-Sheng TSAI
IPC: G01S17/36 , G01S7/4915 , G01S7/4913 , G01S7/4911
CPC classification number: G01S17/36 , G01S7/4915 , G01S7/4913 , G01S7/4911
Abstract: There is provided a distance measurement device including a light source, a light detector, a time control circuit and a processor. In first measurement, the time control circuit controls the light source to illuminate at a low modulation frequency, and the processor calculates a rough flying time according to a first detection signal of the light detector to determine an operating phase zone and a delay time. In second measurement, the time control circuit controls the light source to illuminate at a high modulation frequency and causes a light driving signal of the light source and a detecting control signal of the light detector to have a difference of the delay time, and the processor calculates a fine flying time according to a second detection signal of the light detector.
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公开(公告)号：US20210185260A1
公开(公告)日：2021-06-17
申请号：US17172147
申请日：2021-02-10
Applicant: PIXART IMAGING INC.
Inventor： Sen-Huang HUANG , Tso-Sheng TSAI
IPC: H04N5/378 , H04N5/374 , H01L27/146
Abstract: There is provided an image sensor employing an avalanche diode. The image sensor includes a plurality of pixel circuits arranged in a matrix, a plurality of pulling circuits, a plurality of output circuits and a global current source circuit. Each of the plurality of pixel circuits includes a single photon avalanche diode and a P-type or N-type select switch transistor. Each of the plurality of pulling circuits is arranged corresponding to one pixel circuit column. The global current source circuit is used to form a current mirror with each of the plurality of pulling circuits. Each of the plurality of output circuits is shared by at least two pixel circuits.
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公开(公告)号：US20210344862A1
公开(公告)日：2021-11-04
申请号：US17378843
申请日：2021-07-19
Applicant: PIXART IMAGING INC.
Inventor： Tso-Sheng TSAI
IPC: H04N5/378 , H04N5/374 , H01L27/146
Abstract: There is provided an image sensor employing an avalanche diode. The image sensor includes a plurality of pixel circuits arranged in a matrix, a plurality of pulling circuits and a global current source circuit. Each of the plurality of pixel circuits includes a single photon avalanche diode and four P-type or N-type transistors. Each of the plurality of pulling circuits is arranged corresponding to one pixel circuit column. The global current source circuit is used to form a current mirror with each of the plurality of pulling circuits.
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9.发明申请公开(公告)号：US20200092540A1
公开(公告)日：2020-03-19
申请号：US16458605
申请日：2019-07-01
Applicant: PixArt Imaging Inc.
Inventor： Tso-Sheng TSAI
Abstract: There is provided a detection device using a SPAD array including a sensor array, multiple counters, a processor and a frame buffer. The sensor array includes a plurality of SPADs respectively generates an avalanche current while receiving a photon. Each counter counts a number of triggering times of the avalanche current of a corresponding SPAD within an exposure interval. The frame buffer is pre-stored with a plurality of gain calibration values corresponding to every SPAD of the sensor array. The processor accesses the gain calibration values to accordingly calibrate a counting image frame outputted by the sensor array to output a calibrated image frame.
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公开(公告)号：US20200088843A1
公开(公告)日：2020-03-19
申请号：US16129804
申请日：2018-09-13
Applicant: PixArt Imaging Inc.
Inventor： Tso-Sheng TSAI
Abstract: There is provided an object detection device including a light source, an avalanche diode, a first counter, a second counter and a processor. The light source emits light within a first interval, and is turned off within a second interval, a third interval and a fourth interval. The avalanche diode detects photons corresponding to the first interval, second, third and fourth intervals to trigger avalanche events. The first counter performs up-counting on the avalanche events in the first interval and performs down-counting on the avalanche events in the third interval to generate a first count value. The second counter performs up-counting on the avalanche events in the second interval and performs down-counting on the avalanche events in the fourth interval to generate a second count value. The processor calculates a time-of-flight according to the first count value and the second count value.
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