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公开(公告)号：US11915581B2
公开(公告)日：2024-02-27
申请号：US17558678
申请日：2021-12-22
发明人： David J. Knapp , Horace C. Ho
IPC分类号： G08C23/04 , H04B10/116 , H04L12/28 , H04L12/64 , H05B47/195
CPC分类号： G08C23/04 , H04B10/116 , H04L12/282 , H04L12/2838 , H04L12/6418 , H05B47/195 , G08C2201/93 , H04L2012/2841 , H04L2012/285
摘要： A system and method are provided herein for communicating with and controlling various devices using visible light communication (VLC). According to one embodiment, a method is provided for extending a communication range of a VLC system comprising a plurality of controlled devices and a remote-control device. Such a method may include, for example, transmitting a communication message from a remote-control device to a first controlled device located within range of the remote-control device, wherein the communication message is transmitted through free space using visible light, and extending the communication range of the VLC system to a second controlled device, which is located outside of the range of the remote-control device, by using the first controlled device to retransmit the communication message through free space using visible light to the second controlled device.
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公开(公告)号：US11662077B2
公开(公告)日：2023-05-30
申请号：US17739857
申请日：2022-05-09
发明人： Fangxu Dong , Horace C. Ho , David J. Knapp
IPC分类号： F21V5/00 , F21K9/233 , F21V23/04 , H05B45/22 , H05B45/46 , F21Y113/13 , F21Y105/10
CPC分类号： F21V5/007 , F21K9/233 , F21V5/004 , F21V23/0457 , H05B45/22 , H05B45/46 , F21Y2105/10 , F21Y2113/13
摘要： Illumination devices with improved color mixing optics are disclosed herein for mixing the colors produced by a multi-colored LED emitter module to produce uniform color throughout the entire beam angle of the output light beam, along with smoother edges and improved center beam intensity. Embodiments disclosed herein include a unique arrangement of multi-color LEDs within an emitter module, a unique exit lens with different patterns of lenslets on opposing sides of the lens, and other associated optical features that thoroughly mix the different color components, and as such, provide uniform color across the output beam exiting the illumination device. Additional embodiments disclosed herein include a unique arrangement of photodetectors within the primary optics structure of the LED emitter module that ensure the optical feedback system properly measures the light produced by all similarly colored emission LEDs.
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公开(公告)号：USRE49479E1
公开(公告)日：2023-03-28
申请号：US16033917
申请日：2018-07-12
摘要： An illumination device and method is provided herein for calibrating individual LEDs and photodetector(s) included within the illumination device, so as to obtain a desired luminous flux and a desired chromaticity of the device over time as the LEDs age. Specifically, a calibration method is provided herein for characterizing each emission LED and each photodetector separately. The wavelength and intensity of the illumination produced by each emission LED is accurately characterized over a plurality of different drive currents and ambient temperatures, and at least a subset of the wavelength and intensity measurement values are stored with a storage medium of the illumination device for each emission LED. The responsivity of the photodetector is accurately characterized over emitter wavelength and photodetector junction temperature, and results of said characterization are stored with the storage medium.
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公开(公告)号：US20220167479A1
公开(公告)日：2022-05-26
申请号：US17669976
申请日：2022-02-11
发明人： Horace C. Ho , Jason E. Lewis , David J. Knapp
IPC分类号： H05B47/10 , G01J3/46 , G01J3/50 , G01J1/02 , G01J3/02 , H05B45/22 , H05B45/24 , H05B47/24 , H05B47/21 , H05B45/12 , G01J1/32 , G01J1/42 , G01R31/44
摘要： An illumination device and method are provided herein for calibrating individual LEDs in the illumination device to obtain a desired luminous flux and a desired chromaticity of the device over changes in drive current, temperature, and over time as the LEDs age. The calibration method may include subjecting the illumination device to a first ambient temperature, successively applying at least three different drive currents to a first LED to produce illumination at three or more different levels of brightness, obtaining a plurality of optical measurements from the illumination produced by the first LED at each of the at least three different drive currents, obtaining a plurality of electrical measurements from the photodetector and storing results of the obtaining steps within the illumination device to calibrate the first LED at the first ambient temperature. The plurality of optical measurements may generally include luminous flux and chromaticity, the plurality of electrical measurements may generally include induced photocurrents and forward voltages, and the calibration method steps may be repeated for each LED included within the illumination device and upon subjecting the illumination device to a second ambient temperature.
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公开(公告)号：US11252805B2
公开(公告)日：2022-02-15
申请号：US16819497
申请日：2020-03-16
发明人： Horace C. Ho , Jason E. Lewis , David J. Knapp
IPC分类号： H05B47/10 , G01J1/32 , G01J3/46 , G01J3/50 , G01J1/02 , G01J3/02 , H05B45/22 , H05B45/24 , H05B47/24 , H05B47/21 , H05B45/12 , G01J1/42 , G01R31/44 , G01J1/44 , H05B47/105 , H05B45/18
摘要： An illumination device and method is provided herein for calibrating individual LEDs in the illumination device, so as to obtain a desired luminous flux and a desired chromaticity of the device over changes in drive current, temperature, and over time as the LEDs age. The calibration method may include subjecting the illumination device to a first ambient temperature, successively applying at least three different drive currents to a first LED to produce illumination at three or more different levels of brightness, obtaining a plurality of optical measurements from the illumination produced by the first LED at each of the at least three different drive currents, obtaining a plurality of electrical measurements from the photodetector and storing results of the obtaining steps within the illumination device to calibrate the first LED at the first ambient temperature. The plurality of optical measurements may generally include luminous flux and chromaticity, the plurality of electrical measurements may generally include induced photocurrents and forward voltages, and the calibration method steps may be repeated for each LED included within the illumination device and upon subjecting the illumination device to a second ambient temperature.
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公开(公告)号：US12052807B2
公开(公告)日：2024-07-30
申请号：US18212994
申请日：2023-06-22
发明人： Horace C. Ho , Jason E. Lewis , David J. Knapp
IPC分类号： H05B47/10 , G01J1/02 , G01J1/32 , G01J1/42 , G01J1/44 , G01J3/02 , G01J3/46 , G01J3/50 , G01R31/44 , H05B45/12 , H05B45/18 , H05B45/22 , H05B45/24 , H05B47/105 , H05B47/21 , H05B47/24
CPC分类号： H05B47/10 , G01J1/0252 , G01J1/32 , G01J1/42 , G01J3/0286 , G01J3/465 , G01J3/505 , G01R31/44 , H05B45/12 , H05B45/22 , H05B45/24 , H05B47/22 , H05B47/24 , G01J2001/4252 , G01J2001/444 , H05B45/18 , H05B47/105
摘要： An illumination device and method are provided herein for calibrating individual LEDs in the illumination device to obtain a desired luminous flux and a desired chromaticity of the device over changes in drive current, temperature, and over time as the LEDs age. The calibration method may include subjecting the illumination device to a first ambient temperature, successively applying at least three different drive currents to a first LED to produce illumination at three or more different levels of brightness, obtaining a plurality of optical measurements from the illumination produced by the first LED at each of the at least three different drive currents, obtaining a plurality of electrical measurements from the photodetector and storing results of the obtaining steps within the illumination device to calibrate the first LED at the first ambient temperature. The plurality of optical measurements may generally include luminous flux and chromaticity, the plurality of electrical measurements may generally include induced photocurrents and forward voltages, and the calibration method steps may be repeated for each LED included within the illumination device and upon subjecting the illumination device to a second ambient temperature.
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公开(公告)号：US20230250935A1
公开(公告)日：2023-08-10
申请号：US18301578
申请日：2023-04-17
发明人： Fangxu Dong , Horace C. Ho , David J. Knapp
CPC分类号： F21V5/007 , F21V5/004 , F21K9/233 , F21V23/0457 , H05B45/22 , H05B45/46 , F21Y2113/13
摘要： Illumination devices with improved color mixing optics are disclosed herein for mixing the colors produced by a multi-colored LED emitter module to produce uniform color throughout the entire beam angle of the output light beam, along with smoother edges and improved center beam intensity. Embodiments disclosed herein include a unique arrangement of multi-color LEDs within an emitter module, a unique exit lens with different patterns of lenslets on opposing sides of the lens, and other associated optical features that thoroughly mix the different color components, and as such, provide uniform color across the output beam exiting the illumination device. Additional embodiments disclosed herein include a unique arrangement of photodetectors within the primary optics structure of the LED emitter module that ensure the optical feedback system properly measures the light produced by all similarly colored emission LEDs.
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公开(公告)号：US12072091B2
公开(公告)日：2024-08-27
申请号：US18301578
申请日：2023-04-17
发明人： Fangxu Dong , Horace C. Ho , David J. Knapp
IPC分类号： F21V5/00 , F21K9/233 , F21V23/04 , H05B45/22 , H05B45/46 , F21Y105/10 , F21Y113/13
CPC分类号： F21V5/007 , F21K9/233 , F21V5/004 , F21V23/0457 , H05B45/22 , H05B45/46 , F21Y2105/10 , F21Y2113/13
摘要： Illumination devices with improved color mixing optics are disclosed herein for mixing the colors produced by a multi-colored LED emitter module to produce uniform color throughout the entire beam angle of the output light beam, along with smoother edges and improved center beam intensity. Embodiments disclosed herein include a unique arrangement of multi-color LEDs within an emitter module, a unique exit lens with different patterns of lenslets on opposing sides of the lens, and other associated optical features that thoroughly mix the different color components, and as such, provide uniform color across the output beam exiting the illumination device. Additional embodiments disclosed herein include a unique arrangement of photodetectors within the primary optics structure of the LED emitter module that ensure the optical feedback system properly measures the light produced by all similarly colored emission LEDs.
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公开(公告)号：US20240161602A1
公开(公告)日：2024-05-16
申请号：US18421636
申请日：2024-01-24
发明人： David J. Knapp , Horace C. Ho
IPC分类号： G08C23/04 , H04B10/116 , H04L12/28 , H04L12/64 , H05B47/195
CPC分类号： G08C23/04 , H04B10/116 , H04L12/282 , H04L12/2838 , H04L12/6418 , H05B47/195 , G08C2201/93 , H04L2012/2841 , H04L2012/285
摘要： A system and method are provided herein for communicating with and controlling various devices using visible light communication (VLC). According to one embodiment, a method is provided for extending a communication range of a VLC system comprising a plurality of controlled devices and a remote-control device. Such a method may include, for example, transmitting a communication message from a remote-control device to a first controlled device located within range of the remote-control device, wherein the communication message is transmitted through free space using visible light, and extending the communication range of the VLC system to a second controlled device, which is located outside of the range of the remote-control device, by using the first controlled device to retransmit the communication message through free space using visible light to the second controlled device.
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10.发明公开公开(公告)号：US20230422376A1
公开(公告)日：2023-12-28
申请号：US18212994
申请日：2023-06-22
发明人： Horace C. Ho , Jason E. Lewis , David J. Knapp
IPC分类号： H05B47/10 , G01J3/46 , G01J3/50 , G01J1/02 , G01J3/02 , H05B45/22 , H05B45/24 , H05B47/24 , H05B47/21 , H05B45/12 , G01J1/32 , G01J1/42 , G01R31/44
CPC分类号： H05B47/10 , G01J3/465 , G01J3/505 , G01J1/0252 , G01J3/0286 , H05B45/22 , H05B45/24 , H05B47/24 , H05B47/22 , H05B45/12 , G01J1/32 , G01J1/42 , G01R31/44 , G01J2001/4252 , G01J2001/444
摘要： An illumination device and method are provided herein for calibrating individual LEDs in the illumination device to obtain a desired luminous flux and a desired chromaticity of the device over changes in drive current, temperature, and over time as the LEDs age. The calibration method may include subjecting the illumination device to a first ambient temperature, successively applying at least three different drive currents to a first LED to produce illumination at three or more different levels of brightness, obtaining a plurality of optical measurements from the illumination produced by the first LED at each of the at least three different drive currents, obtaining a plurality of electrical measurements from the photodetector and storing results of the obtaining steps within the illumination device to calibrate the first LED at the first ambient temperature. The plurality of optical measurements may generally include luminous flux and chromaticity, the plurality of electrical measurements may generally include induced photocurrents and forward voltages, and the calibration method steps may be repeated for each LED included within the illumination device and upon subjecting the illumination device to a second ambient temperature.
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