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公开(公告)号：US20230299937A1
公开(公告)日：2023-09-21
申请号：US17695803
申请日：2022-03-15
Applicant: PixArt Imaging Inc.
Inventor： Chih-Huan Wu , Wen-Han Yao , Ren-Hau Gu
IPC: H04L7/00 , H04L67/141 , H04L67/12
CPC classification number: H04L7/0075 , H04L67/141 , H04L67/12
Abstract: A method of an optical sensor device includes: using an oscillator circuit to generate a clock signal; and generating monitoring frames according to the clock signal; wherein the clock signal is calibrated in response to at least one of: a first communication signal, transmitted for multiple times from a monitoring system externally coupled to the optical sensor device, is received by the optical sensor device; a data length of the first communication signal transmitted for only one time from the monitoring system externally coupled to the optical sensor device; and, a data length of an encoded data portion of the first communication signal transmitted for only one time.
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12.发明授权公开(公告)号：US11336869B2
公开(公告)日：2022-05-17
申请号：US17010793
申请日：2020-09-02
Applicant: PixArt Imaging Inc.
Inventor： Wen-Han Yao , Chih-Huan Wu
Abstract: A motion detection method utilized for a motion sensor includes: capturing a monitoring image; entering a recording mode when one intensity change value between the monitoring image and a pre-stored background image is higher than a first threshold and a trigger signal is received from an auxiliary sensor; and entering the recording mode when the intensity change value is higher than a second threshold before the trigger signal is received; wherein the second threshold is higher than the first threshold.
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公开(公告)号：US11290671B2
公开(公告)日：2022-03-29
申请号：US17009417
申请日：2020-09-01
Applicant: PixArt Imaging Inc.
Inventor： Ren-Chieh Liu , Chih-Huan Wu , Yi-Hsien Ko , Han-Chi Liu
IPC: H04N5/3745 , H01L27/146
Abstract: There is provided a pixel circuit for performing analog operation including a photodiode, a first temporal circuit, a second temporal circuit and an operation circuit. Within a first interval, the photodiode detects first light energy to be stored in the first temporal circuit. Within a second interval, the photodiode detects second light energy to be stored in the second temporal circuit. Within an operation interval, the first temporal circuit outputs a first detection signal having a first pulse width according to the first light energy and outputs a second detection signal having a second pulse width according to the second light energy for being calculated by the operation circuit.
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公开(公告)号：US12114063B2
公开(公告)日：2024-10-08
申请号：US17951221
申请日：2022-09-23
Applicant: PIXART IMAGING INC.
Inventor： Chih-Huan Wu
CPC classification number: H04N23/651 , G06T7/254 , H04N23/667 , H04N23/6811 , H04N25/42 , G06T7/246
Abstract: There is provided a motion sensor including a pixel array and a processor. The motion sensor is embedded with multiple power consumption modes. In one of the multiple power consumption modes, the pixel array outputs image frames having different frame formats. The processor processes the image frames having different frame formats respectively using different algorithms so as to achieve the purposes of low power consumption and high detection sensitivity.
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公开(公告)号：US20240073359A1
公开(公告)日：2024-02-29
申请号：US18504182
申请日：2023-11-08
Applicant: PixArt Imaging Inc.
Inventor： Chih-Huan Wu , Yi-Hsien Ko , Wen-Han Yao
Abstract: A motion detection method applied into an image sensor device includes: providing a plurality of regions of interest (ROIs) on at least one monitoring image; for each region of interest (ROI): detecting whether at least one motion event occurs within the each ROI; and determining a priority level of the each ROI according to at least one feature information of the at least one motion event; and determining an alarm schedule of the ROIs for a user according to a plurality of priority levels of the ROIs.
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Patent Agency Ranking
公开(公告)号：US20210329193A1
公开(公告)日：2021-10-21
申请号：US17326298
申请日：2021-05-20
Applicant: PixArt Imaging Inc.
Inventor： Chih-Huan Wu , Yi-Hsien Ko , Wen-Han Yao
Abstract: A motion detection method applied into an image sensor device includes: providing a plurality of regions of interest (ROIs) on at least one monitoring image; for each region of interest (ROI): detecting whether at least one motion event occurs within the each ROI; and determining a priority level of the each ROI according to at least one feature information of the at least one motion event; and determining an alarm schedule of the ROIs for a user according to a plurality of priority levels of the RIOs.
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公开(公告)号：US12184998B2
公开(公告)日：2024-12-31
申请号：US18076392
申请日：2022-12-07
Applicant: PIXART IMAGING INC.
Inventor： Chih-Huan Wu
IPC: H04N5/335 , H04N23/73 , H04N25/51 , H04N25/532
Abstract: There is provided a global shutter sensor including a pixel array and a processor. The pixel array acquires first pixel data corresponding to a first exposure period and second pixel data corresponding to a second exposure period of different pixel regions using time division or spatial division, wherein the first exposure period is shorter than the second exposure period. The processor calculates a difference between (the second exposure period/the first exposure period)×the first pixel data and the second pixel data to obtain parasitic light sensitivity of the different pixel regions, and determines gains and/or exposure periods corresponding to the different pixel regions to compensate the parasitic light sensitivity.
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公开(公告)号：US20240064416A1
公开(公告)日：2024-02-22
申请号：US17889366
申请日：2022-08-16
Applicant: PixArt Imaging Inc.
Inventor： Chih-Huan Wu
CPC classification number: H04N5/2357 , H04N5/35554 , H04N5/378
Abstract: An optical sensor, for sensing a sensing frame corresponding to a flicker period of ambient light, comprising: a pixel array, configured to perform N times of exposure operations via at least one pixel of the pixel array in N exposure time intervals to generate N sub-frames, wherein a summation of the N exposure time intervals equals to a sensing interval and the sensing interval is less than or identical to a first flicker period. The optical sensor adds the N sub-frames to generate a summing sub-frame. The sensing frame comprises the summing sub-frame. The adding operation can also be performed to digital signals generated from the sub-frames. The influences caused by the fluctuation of ambient light can be neutralized, since the frame or portion of the frame is sensed at least twice at different phases of a single flicked period. By this way, the conventional flicker issue can be improved.
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公开(公告)号：US11871140B2
公开(公告)日：2024-01-09
申请号：US17847183
申请日：2022-06-23
Applicant: PixArt Imaging Inc.
Inventor： Chih-Huan Wu , Yi-Hsien Ko , Wen-Han Yao
Abstract: A motion detection method applied into an image sensor device includes: providing a plurality of regions of interest (ROIs) on at least one monitoring image; for each region of interest (ROI): detecting whether at least one motion event occurs within the each ROI; and determining a priority level of the each ROI according to at least one feature information of the at least one motion event; and determining an alarm schedule of the ROIs for a user according to a plurality of priority levels of the ROIs.
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公开(公告)号：US11792550B2
公开(公告)日：2023-10-17
申请号：US18071477
申请日：2022-11-29
Applicant: PixArt Imaging Inc.
Inventor： Ren-Chieh Liu , Chih-Huan Wu , Yi-Hsien Ko , Han-Chi Liu
IPC: H04N25/772 , H01L27/146
CPC classification number: H04N25/772 , H01L27/14643
Abstract: There is provided a pixel circuit for performing analog operation including a photodiode, a first temporal circuit, a second temporal circuit and an operation circuit. Within a first interval, the photodiode detects first light energy to be stored in the first temporal circuit. Within a second interval, the photodiode detects second light energy to be stored in the second temporal circuit. Within an operation interval, the first temporal circuit outputs a first detection signal having a first pulse width according to the first light energy and outputs a second detection signal having a second pulse width according to the second light energy for being calculated by the operation circuit.
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