Patents by Inventor Yongdan Hu
Yongdan Hu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240081122Abstract: A display system may include a light source that emits input light having a wavelength within a source wavelength range and an array of color conversion units overlapping a display area. A first set of color conversion units of the array of color conversion units may include a first color conversion medium that converts the input light to a first color of light having a wavelength within a first wavelength range that is different than the source wavelength range. The display system may also include a waveguide having an out-coupler that directs the input light from the light source toward the array of color conversion units. Various other devices, systems, and methods are also disclosed.Type: ApplicationFiled: September 7, 2023Publication date: March 7, 2024Inventors: Zhimin Shi, Yun Wang, Fenglin Peng, Christophe Antoine Hurni, James Ronald Bonar, Edward Buckley, Andrew John Ouderkirk, Yongdan Hu
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Patent number: 11860395Abstract: A self-lit display panel includes a photonic integrated circuit payer including an array of waveguides and an array of out-couplers for out-coupling portions of the illuminating light through pixels of the panel. The self-lit display panel may include a transparent electronic circuitry layer backlit by the photonic integrated circuit layer; the two layers may be on a same substrate or on opposed substrates defining a cell filled with an electro-active material. The configuration allows for chief ray engineering, zonal illuminating, and separate illumination with red, green, and blue illuminating light.Type: GrantFiled: March 31, 2023Date of Patent: January 2, 2024Assignee: Meta Platforms Technologies LLCInventors: Zhujun Shi, Keith Patterson, Maxwell Parsons, Yongdan Hu, Giuseppe Calafiore, Zhimin Shi
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Patent number: 11726252Abstract: A self-lit display panel includes a photonic integrated circuit payer including an array of waveguides and an array of out-couplers for out-coupling portions of the illuminating light through pixels of the panel. The self-lit display panel may include a transparent electronic circuitry layer backlit by the photonic integrated circuit layer; the two layers may be on a same substrate or on opposed substrates defining a cell filled with an electro-active material. The configuration allows for chief ray engineering, zonal illuminating, and separate illumination with red, green, and blue illuminating light.Type: GrantFiled: May 10, 2022Date of Patent: August 15, 2023Assignee: META PLATFORMS TECHNOLOGIES, LLCInventors: Zhujun Shi, Keith Patterson, Maxwell Parsons, Giuseppe Calafiore, Yongdan Hu, Zhimin Shi
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Publication number: 20230236351Abstract: A self-lit display panel includes a photonic integrated circuit payer including an array of waveguides and an array of out-couplers for out-coupling portions of the illuminating light through pixels of the panel. The self-lit display panel may include a transparent electronic circuitry layer backlit by the photonic integrated circuit layer; the two layers may be on a same substrate or on opposed substrates defining a cell filled with an electro-active material. The configuration allows for chief ray engineering, zonal illuminating, and separate illumination with red, green, and blue illuminating light.Type: ApplicationFiled: March 31, 2023Publication date: July 27, 2023Inventors: Zhujun Shi, Keith Patterson, Maxwell Parsons, Yongdan Hu, Giuseppe Calafiore, Zhimin Shi
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Publication number: 20230185010Abstract: A self-lit display panel includes a photonic integrated circuit payer including an array of waveguides and an array of out-couplers for out-coupling portions of the illuminating light through pixels of the panel. The self-lit display panel may include a transparent electronic circuitry layer backlit by the photonic integrated circuit layer; the two layers may be on a same substrate or on opposed substrates defining a cell filled with an electro-active material. The configuration allows for chief ray engineering, zonal illuminating, and separate illumination with red, green, and blue illuminating light.Type: ApplicationFiled: May 10, 2022Publication date: June 15, 2023Inventors: Zhujun Shi, Keith Patterson, Maxwell Parsons, Giuseppe Calafiore, Yongdan Hu, Zhimin Shi
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Publication number: 20230185011Abstract: A self-lit display panel includes a photonic integrated circuit payer including an array of waveguides and an array of out-couplers for out-coupling portions of the illuminating light through pixels of the panel. The self-lit display panel may include a transparent electronic circuitry layer backlit by the photonic integrated circuit layer; the two layers may be on a same substrate or on opposed substrates defining a cell filled with an electro-active material. The configuration allows for chief ray engineering, zonal illuminating, and separate illumination with red, green, and blue illuminating light.Type: ApplicationFiled: May 10, 2022Publication date: June 15, 2023Inventors: Zhujun Shi, Keith Patterson, Maxwell Parsons, Giuseppe Calafiore, Yongdan Hu, Zhimin Shi
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Publication number: 20230029109Abstract: Various embodiments set forth optical patterning systems. In some embodiments, an optical patterning system includes multiple liquid crystal (LC) layers and a substrate including circuitry that is connected to each of the LC layers. Each LC layer is independently addressable, via connections to the circuitry in the substrate, to modulate a different degree of freedom (DOF) of light, such as an amplitude, a phase, a distinct polarization component, or an amplitude or a phase of a polarization component of the light. In addition, each LC layer can be configured to operate in a non-resonant mode, in which light passes through the LC layer a single time, or in a resonant mode, in which light bounces back and forth between reflective layers multiple times to enhance the interaction with the LC layer.Type: ApplicationFiled: July 21, 2021Publication date: January 26, 2023Inventors: Zhimin SHI, Yongdan HU, Changwon JANG
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Patent number: 10935611Abstract: A magnetometer for magnetic detection includes a magneto-optical defect center material having at least one magneto-optical defect center; a radio frequency (RF) exciter system including a radio frequency (RF) excitation source; an optical excitation system including an optical excitation source; an optical detector configured to receive an optical signal based on light emitted by the magneto-optical defect center material due RF excitation and optical excitation provided to the magneto-optical defect center material via the RF excitation source and the optical excitation source, respectively; a magnetic field generator configured to generate a magnetic field detected at the magneto-optical defect center material; and a system controller.Type: GrantFiled: July 10, 2018Date of Patent: March 2, 2021Assignee: LOCKHEED MARTIN CORPORATIONInventors: Joseph W. Hahn, Cedric H. Wu, Yongdan Hu, Kenneth Michael Jackson, Gregory Scott Bruce, Wilbur Lew, Andrew Raymond Mandeville, Duc Huynh
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Publication number: 20190219645Abstract: A magnetometer for magnetic detection includes a magneto-optical defect center material comprising at least one magneto-optical defect center that emits an optical signal when excited by an excitation light, a radio frequency (RF) exciter system configured to provide RF excitation to the magneto-optical defect center material; an optical excitation system configured to direct the excitation light to the magneto-optical defect center material; an optical detector configured to receive the optical signal emitted by the magneto-optical defect center material based on the excitation light and the RF excitation; a magnetic field generator configured to generate a magnetic field detected at the magneto-optical defect center material; and a housing configured to enclose the magneto-optical defect center material, the RF exciter system, the optical excitation system, the optical detector, and the magnetic field generator. The housing is hermetically sealed.Type: ApplicationFiled: January 14, 2019Publication date: July 18, 2019Inventors: Joseph W. HAHN, Wilbur LEW, Andrew Raymond MANDEVILLE, Yongdan HU
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Publication number: 20190018087Abstract: Systems and methods using a magneto-optical defect center material magnetic sensor system that uses fluorescence intensity to distinguish the ms=±1 states, and to measure the magnetic field based on the energy difference between the ms=+1 state and the ms=?1 state, as manifested by the RF frequencies corresponding to each state in some embodiments. The system may include an optical excitation source, which directs optical excitation to the material. The system may further include an RF excitation source, which provides RF radiation to the material. Light from the material may be directed through an optical waveguide assembly comprising an optical waveguide with a hollow core and at least one optical filter coating.Type: ApplicationFiled: July 10, 2018Publication date: January 17, 2019Applicant: LOCKHEED MARTIN CORPORATIONInventors: Joseph W. HAHN, Yongdan HU, Wilbur LEW
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Publication number: 20190018085Abstract: A system for magnetic detection is described. The system includes a magneto-optical defect center material including a plurality of magneto-optical defect centers, an RF excitation source, an optical excitation source assembly including an optical excitation source, a system controller, and an optical detector. The system controller is configured to control the RF excitation source to provide RF excitation to the magneto-optical defect center material, and control the optical excitation source to provide optical excitation to the magneto-optical defect center material. The optical detector is configured to receive an optical signal based on light emitted by the magneto-optical defect center material due to the RF excitation and the optical excitation provided to the magneto-optical defect center material.Type: ApplicationFiled: July 10, 2018Publication date: January 17, 2019Applicant: LOCKHEED MARTIN CORPORATIONInventors: Cedric H. WU, Joseph W. HAHN, Yongdan HU, Kenneth M. JACKSON
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Publication number: 20190018077Abstract: Systems for a magneto-optical defect center material magnetic sensor system that uses fluorescence intensity to distinguish the ms=±1 states, and to measure the magnetic field based on the energy difference between the ms=+1 state and the ms=?1 state, as manifested by the RF frequencies corresponding to each state in some embodiments. The system may include an optical excitation source, which directs optical excitation to the material. The system may further include an RF excitation source, which provides RF radiation to the material. Light from the material may be directed through a light pipe to an optical detector. Light from the material may be directed through an optical filter and a lens to be focused at a focal point corresponding to a collection portion of an optical detector.Type: ApplicationFiled: July 10, 2018Publication date: January 17, 2019Applicant: LOCKHEED MARTIN CORPORATIONInventors: Cedric H. WU, Joseph W. HAHN, Yongdan HU
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Publication number: 20190018088Abstract: Systems for a magneto-optical defect center material magnetic sensor system that uses fluorescence intensity to distinguish the ms=±1 states, and to measure the magnetic field based on the energy difference between the ms=+1 state and the ms=?1 state, as manifested by the RF frequencies corresponding to each state in some embodiments. The system may include an optical excitation source, which directs optical excitation to the material. The system may further include an RF excitation source, which provides RF radiation to the material. Light from the material may be directed through a light pipe to an optical detector. Light from the material may be directed through an optical filter and a lens to be focused at a focal point corresponding to a collection portion of an optical detector.Type: ApplicationFiled: July 10, 2018Publication date: January 17, 2019Applicant: LOCKHEED MARTIN CORPORATIONInventors: Yongdan HU, Joseph W. HAHN, Gregory Scott BRUCE
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Publication number: 20190018076Abstract: A magnetometer for magnetic detection includes a magneto-optical defect center material having at least one magneto-optical defect center; a radio frequency (RF) exciter system including a radio frequency (RF) excitation source; an optical excitation system including an optical excitation source; an optical detector configured to receive an optical signal based on light emitted by the magneto-optical defect center material due RF excitation and optical excitation provided to the magneto-optical defect center material via the RF excitation source and the optical excitation source, respectively; a magnetic field generator configured to generate a magnetic field detected at the magneto-optical defect center material; and a system controller.Type: ApplicationFiled: July 10, 2018Publication date: January 17, 2019Applicant: LOCKHEED MARTIN CORPORATIONInventors: Joseph W. HAHN, Cedric H. WU, Yongdan HU, Kenneth Michael JACKSON, Gregory Scott BRUCE, Wilbur LEW, Andrew Raymond MANDEVILLE, Duc HUYNH
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Publication number: 20180252984Abstract: Apparatus and method for high-power multi-function millimeter-wavelength (THz-frequency) signal generation using OPO and DFG in a single cavity. In some embodiments, the OPO-DFG cavity includes an optical parametric oscillator (OPO) non-linear material that receives pump light IP having pump-light frequency and generates two different lower intermediate frequencies of light—an OPO-signal beam IS and a spatially/temporally overlapping OPO-idler beam II. A difference-frequency generator non-linear material then receives the two intermediate-frequency beams II and IS, and the DFG then generates a THz-frequency output signal that has a frequency equal to the difference between the two intermediate frequencies. In some embodiments, a single-piece crystal of non-linear material is used for both OPO and DFG functions.Type: ApplicationFiled: May 3, 2018Publication date: September 6, 2018Inventors: Yongdan Hu, Andrew Xing, Angus J. Henderson
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Patent number: 10001695Abstract: Apparatus and method for high-power multi-function millimeter-wavelength (THz-frequency) signal generation using OPO and DFG in a single cavity. In some embodiments, the OPO-DFG cavity includes an optical parametric oscillator (OPO) non-linear material that receives pump light IP having pump-light frequency and generates two different lower intermediate frequencies of light—an OPO-signal beam IS and a spatially/temporally overlapping OPO-idler beam II. A difference-frequency generator non-linear material then receives the two intermediate-frequency beams II and IS, and the DFG then generates a THz-frequency output signal that has a frequency equal to the difference between the two intermediate frequencies. In some embodiments, a single-piece crystal of non-linear material is used for both OPO and DFG functions.Type: GrantFiled: March 1, 2017Date of Patent: June 19, 2018Assignee: Lockheed Martin CorporationInventors: Yongdan Hu, Andrew Xing, Angus J. Henderson
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Patent number: 9927621Abstract: A method and apparatus for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination. This invention includes a plurality of laser sources that emit a plurality of beamlets, wherein each one of the plurality of beamlets has a different wavelength; a beam annularizer that includes a plurality of optical units arranged to receive the beamlets, and configured to convert each beamlet into a respective annular beam that has an annular cross-sectional power profile; a beam-intersection transform element configured to point each respective one of the plurality of annular beams in an angular intersection arrangement toward a first location; and a spectral beam combiner at the first location configured to combine the plurality of wavelengths in the plurality of annular beams into a first annular spectrally combined beam.Type: GrantFiled: June 14, 2016Date of Patent: March 27, 2018Assignee: Lockheed Martin CorporationInventors: Eric C. Honea, Yongdan Hu
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Publication number: 20170176838Abstract: Apparatus and method for high-power multi-function millimeter-wavelength (THz-frequency) signal generation using OPO and DFG in a single cavity. In some embodiments, the OPO-DFG cavity includes an optical parametric oscillator (OPO) non-linear material that receives pump light IP having pump-light frequency and generates two different lower intermediate frequencies of light—an OPO-signal beam IS and a spatially/temporally overlapping OPO-idler beam II. A difference-frequency generator non-linear material then receives the two intermediate-frequency beams II and IS, and the DFG then generates a THz-frequency output signal that has a frequency equal to the difference between the two intermediate frequencies. In some embodiments, a single-piece crystal of non-linear material is used for both OPO and DFG functions.Type: ApplicationFiled: March 1, 2017Publication date: June 22, 2017Inventors: Yongdan Hu, Andrew Xing, Angus J. Henderson
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Publication number: 20170068097Abstract: A method and apparatus for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination. This invention includes a plurality of laser sources that emit a plurality of beamlets, wherein each one of the plurality of beamlets has a different wavelength; a beam annularizer that includes a plurality of optical units arranged to receive the beamlets, and configured to convert each beamlet into a respective annular beam that has an annular cross-sectional power profile; a beam-intersection transform element configured to point each respective one of the plurality of annular beams in an angular intersection arrangement toward a first location; and a spectral beam combiner at the first location configured to combine the plurality of wavelengths in the plurality of annular beams into a first annular spectrally combined beam.Type: ApplicationFiled: June 14, 2016Publication date: March 9, 2017Inventors: Eric C. Honea, Yongdan Hu
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Patent number: 9588398Abstract: Apparatus and method for high-power multi-function millimeter-wavelength (THz-frequency) signal generation using OPO and DFG in a single cavity. In some embodiments, the OPO-DFG cavity includes an optical parametric oscillator (OPO) non-linear material that receives pump light IP having pump-light frequency and generates two different lower intermediate frequencies of light—an OPO-signal beam IS and a spatially/temporally overlapping OPO-idler beam II. A difference-frequency generator non-linear material then receives the two intermediate-frequency beams II and IS, and the DFG then generates a THz-frequency output signal that has a frequency equal to the difference between the two intermediate frequencies. In some embodiments, a single-piece crystal of non-linear material is used for both OPO and DFG functions.Type: GrantFiled: June 16, 2015Date of Patent: March 7, 2017Assignee: Lockheed Martin CorporationInventors: Yongdan Hu, Andrew Xing, Angus J. Henderson