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公开(公告)号：US11994416B2
公开(公告)日：2024-05-28
申请号：US18219729
申请日：2023-07-10
Applicant: PixArt Imaging Inc.
Inventor： Kuan-Choong Shim , Gim-Eng Chew , Priscilla Tze-Wei Goh , Meng-Yee Lim
CPC classification number: G01D5/3473
Abstract: There is provided an optical encoder including an encoding medium, multiple photodiodes and a signal processing circuit. The encoding medium includes an index track. The index track includes a first index pattern and a second index pattern. The multiple photodiodes include a first index photodiode, a second index photodiode and a reference index photodiode for receiving modulated light from the first index pattern and the second index pattern. When the first index photodiode is aligned with the first index pattern and the second index photodiode is aligned with the second index pattern, the signal processing circuit outputs a triggering signal.
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公开(公告)号：US12025476B1
公开(公告)日：2024-07-02
申请号：US18307801
申请日：2023-04-27
Applicant: PIXART IMAGING INC.
Inventor： Kuan-Choong Shim , Meng-Yee Lim , Priscilla Tze-Wei Goh , Gim-Eng Chew
CPC classification number: G01D5/34723 , G01D5/3473 , G01D18/001 , G01D2205/20
Abstract: There is provided an optical encoding system including a processor, and a photodiode array and a code disk opposite to each other. The photodiode array includes a detection photodiode group and a calibration photodiode group. If there is a position deviation between the photodiode array and the code disk, the processor determines whether to utilize detection signals of the calibration photodiode group according to phase shifts between detection signals outputted by the detection photodiode group so as to eliminate the phase shifts.
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公开(公告)号：US11566922B2
公开(公告)日：2023-01-31
申请号：US16878054
申请日：2020-05-19
Applicant: PIXART IMAGING INC.
Inventor： Chung-Min Thor , Meng-Yee Lim
Abstract: There is provided an optical encoder with alignable relative positions between elements including an encoding medium, a sensor package and a memory. The sensor package includes a photodiode array and two alignment photodiodes opposite to the encoding medium. The memory records an alignment pattern associated with output signals of the two alignment photodiodes when the encoding medium and the sensor package are at nominal operating positions. When the encoding medium and the sensor package are not at the nominal operating positions, the relative position alignment is performed by adjusting current relative positions between the encoding medium and the sensor package to cause a current pattern associated with output signals of the two alignment photodiodes to be identical to the alignment pattern.
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Patent Agency Ranking
公开(公告)号：US12181315B2
公开(公告)日：2024-12-31
申请号：US18530250
申请日：2023-12-06
Applicant: PixArt Imaging Inc.
Inventor： Chung-Min Thor , Meng-Yee Lim
Abstract: There is provided an optical encoder with alignable relative positions between elements including an encoding medium, a sensor package and a memory. The sensor package includes a photodiode array and two alignment photodiodes opposite to the encoding medium. The memory records an alignment pattern associated with output signals of the two alignment photodiodes when the encoding medium and the sensor package are at nominal operating positions. When the encoding medium and the sensor package are not at the nominal operating positions, the relative position alignment is performed by adjusting current relative positions between the encoding medium and the sensor package to cause a current pattern associated with output signals of the two alignment photodiodes to be identical to the alignment pattern.
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公开(公告)号：US20240361158A1
公开(公告)日：2024-10-31
申请号：US18677941
申请日：2024-05-30
Applicant: PixArt Imaging Inc.
Inventor： Kuan-Choong Shim , Meng-Yee Lim , Priscilla Tze-Wei Goh , Gim-Eng Chew
CPC classification number: G01D5/34723 , G01D5/3473 , G01D18/001 , G01D2205/20
Abstract: There is provided an optical encoding system including a photodiode array and a code disk opposite to each other. The photodiode array includes a detection photodiode group and a calibration photodiode group. If there is a position deviation between the photodiode array and the code disk, whether to utilize detection signals of the calibration photodiode group is determined according to phase shifts between detection signals outputted by the detection photodiode group so as to eliminate the phase shifts.
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公开(公告)号：US20240125629A1
公开(公告)日：2024-04-18
申请号：US18530250
申请日：2023-12-06
Applicant: PixArt Imaging Inc.
Inventor： Chung-Min Thor , Meng-Yee Lim
CPC classification number: G01D5/366 , G01D5/2457 , G01D5/3473 , G01D18/00
Abstract: There is provided an optical encoder with alignable relative positions between elements including an encoding medium, a sensor package and a memory. The sensor package includes a photodiode array and two alignment photodiodes opposite to the encoding medium. The memory records an alignment pattern associated with output signals of the two alignment photodiodes when the encoding medium and the sensor package are at nominal operating positions. When the encoding medium and the sensor package are not at the nominal operating positions, the relative position alignment is performed by adjusting current relative positions between the encoding medium and the sensor package to cause a current pattern associated with output signals of the two alignment photodiodes to be identical to the alignment pattern.
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公开(公告)号：US11874147B2
公开(公告)日：2024-01-16
申请号：US18083621
申请日：2022-12-19
Applicant: PIXART IMAGING INC.
Inventor： Chung-Min Thor , Meng-Yee Lim
CPC classification number: G01D5/366 , G01D5/2457 , G01D5/3473 , G01D18/00
Abstract: There is provided an optical encoder with alignable relative positions between elements including an encoding medium, a sensor package and a memory. The sensor package includes a photodiode array and two alignment photodiodes opposite to the encoding medium. The memory records an alignment pattern associated with output signals of the two alignment photodiodes when the encoding medium and the sensor package are at nominal operating positions. When the encoding medium and the sensor package are not at the nominal operating positions, the relative position alignment is performed by adjusting current relative positions between the encoding medium and the sensor package to cause a current pattern associated with output signals of the two alignment photodiodes to be identical to the alignment pattern.
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公开(公告)号：US11740108B2
公开(公告)日：2023-08-29
申请号：US17104822
申请日：2020-11-25
Applicant: PixArt Imaging Inc.
Inventor： Kuan-Choong Shim , Gim-Eng Chew , Priscilla Tze-Wei Goh , Meng-Yee Lim
CPC classification number: G01D5/3473
Abstract: There is provided an optical encoder including an encoding medium, multiple photodiodes and a signal processing circuit. The encoding medium includes an index track. The index track includes a first index pattern and a second index pattern. The multiple photodiodes include a first index photodiode, a second index photodiode and a reference index photodiode for receiving modulated light from the first index pattern and the second index pattern. When the first index photodiode is aligned with the first index pattern and the second index photodiode is aligned with the second index pattern, the signal processing circuit outputs a triggering signal.
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