Patents by Inventor Yongkang Gao
Yongkang Gao 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: 20240123634Abstract: The present disclosure relates to a gripper, a clamping device having the same and a mobile robot. The gripper includes a gripper arm which is configured to be connected with a driving mechanism of the clamping device, and a gripper finger which is floatably connected to the gripper arm. The gripper finger has a clamping surface. The gripper arm is driven by the driving mechanism to move so as to drive the gripper finger to clamp or release an object to be clamped. Some solutions provided in the present disclosure can solve the problem that the tray cannot be clamped up or is easy to slip off.Type: ApplicationFiled: December 22, 2023Publication date: April 18, 2024Inventors: Yongkang WANG, Jiandong GAO, Jian ZHANG, Zhiheng HE
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Publication number: 20240126836Abstract: A server for communication-efficient model aggregation in federated networks for connected vehicle applications is provided. The server includes a controller programmed to: obtain contributions of a plurality of vehicles in a federated learning framework; determine weights for local gradients received from the plurality of vehicles based on the contributions; adjust the weights based on a comparison of potential functions for the plurality of vehicles; and aggregate the local gradients based on the adjusted weights to obtain a global model.Type: ApplicationFiled: October 18, 2022Publication date: April 18, 2024Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Hao Gao, Yongkang Liu, Emrah Akin Sisbot, Kentaro Oguchi
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Publication number: 20240063606Abstract: A tunable solid state laser device are described comprising a semiconductor based gain chip and a silicon photonic filter chip with tuning capability. The silicon photonic filter chip can comprises an input-output silicon waveguide, at least two ring resonators formed with silicon waveguides, one or more connecting silicon waveguides interfacing with the ring resonators, a separate heater associated with each ring resonator, a temperature sensor configured to measure the chip temperature, and a controller connected to the temperature sensor and the separate heaters and programmed with a feedback loop to maintain the filter temperature to provide the tuned frequency. The one or more connecting silicon waveguides are configured to redirect light resonant with each of the at least two ring resonators back through the input-output silicon waveguide. Corresponding methods are described for the control of the laser frequency. Improved structures of the SiPho multiple filter chip involve a Zagnac interferometer.Type: ApplicationFiled: November 1, 2023Publication date: February 22, 2024Inventors: Yongkang GAO, Jiann-Chang LO
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Patent number: 11811195Abstract: A tunable solid state laser device are described comprising a semiconductor based gain chip and a silicon photonic filter chip with tuning capability. The silicon photonic filter chip can comprises an input-output silicon waveguide, at least two ring resonators formed with silicon waveguides, one or more connecting silicon waveguides interfacing with the ring resonators, a separate heater associated with each ring resonator, a temperature sensor configured to measure the chip temperature, and a controller connected to the temperature sensor and the separate heaters and programmed with a feedback loop to maintain the filter temperature to provide the tuned frequency. The one or more connecting silicon waveguides are configured to redirect light resonant with each of the at least two ring resonators back through the input-output silicon waveguide. Corresponding methods are described for the control of the laser frequency. Improved structures of the SiPho multiple filter chip involve a Zagnac interferometer.Type: GrantFiled: February 28, 2020Date of Patent: November 7, 2023Assignee: NeoPhotonics CorporationInventors: Yongkang Gao, Jiann-Chang Lo
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Publication number: 20230087691Abstract: An optical sensing system includes a transmitter side and a receiver side, and is configured to be positioned below a display of an electronic device. The transmitter side includes a light emitter. The receiver side includes an array of photodiodes. The light emitter of the transmitter side and the array of photodiodes of the receiver side are optically coupled via a waveguide. As a result of this construction, the optical sensing system can be operated as an interferometric optical sensor.Type: ApplicationFiled: September 6, 2022Publication date: March 23, 2023Inventors: Tong Chen, Edward Vail, Mark T. Winkler, Yongkang Gao
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Publication number: 20200280173Abstract: A tunable solid state laser device are described comprising a semiconductor based gain chip and a silicon photonic filter chip with tuning capability. The silicon photonic filter chip can comprises an input-output silicon waveguide, at least two ring resonators formed with silicon waveguides, one or more connecting silicon waveguides interfacing with the ring resonators, a separate heater associated with each ring resonator, a temperature sensor configured to measure the chip temperature, and a controller connected to the temperature sensor and the separate heaters and programmed with a feedback loop to maintain the filter temperature to provide the tuned frequency. The one or more connecting silicon waveguides are configured to redirect light resonant with each of the at least two ring resonators back through the input-output silicon waveguide. Corresponding methods are described for the control of the laser frequency. Improved structures of the SiPho multiple filter chip involve a Zagnac interferometer.Type: ApplicationFiled: February 28, 2020Publication date: September 3, 2020Inventors: Yongkang Gao, Jiann-Chang Lo
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Patent number: 9678004Abstract: An optical device includes a transparent substrate and a conductive layer disposed over an upper surface of the transparent substrate. The conductive layer defines at least one groove inwardly extending from an upper surface and includes an aperture that is spaced apart from the at least one groove. An interface between the upper surface of the conductive layer and an ambient medium defines an optical branch along which surface plasmon polariton modes are excited in response to at least partially coherent light being received by the optical device.Type: GrantFiled: March 9, 2016Date of Patent: June 13, 2017Inventors: Filbert Bartoli, Qiaoqiang Gan, Yongkang Gao
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Publication number: 20160187256Abstract: An optical device includes a transparent substrate and a conductive layer disposed over an upper surface of the transparent substrate. The conductive layer defines at least one groove inwardly extending from an upper surface and includes an aperture that is spaced apart from the at least one groove. An interface between the upper surface of the conductive layer and an ambient medium defines an optical branch along which surface plasmon polariton modes are excited in response to at least partially coherent light being received by the optical device.Type: ApplicationFiled: March 9, 2016Publication date: June 30, 2016Inventors: Filbert Bartoli, Qiaoqiang Gan, Yongkang Gao
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Patent number: 9297955Abstract: An optical device includes a transparent substrate and a conductive layer disposed over an upper surface of the transparent substrate. The conductive layer defines at least one groove inwardly extending from an upper surface and includes an aperture that is spaced apart from the at least one groove. An interface between the upper surface of the conductive layer and an ambient medium defines an optical branch along which surface plasmon polariton modes are excited in response to at least partially coherent light being received by the optical device.Type: GrantFiled: September 6, 2012Date of Patent: March 29, 2016Inventors: Filbert Bartoli, Qiaoqiang Gan, Yongkang Gao
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Publication number: 20150124306Abstract: An ultrathin plasmonic subtractive color filter in one embodiment includes a transparent substrate and an ultrathin nano-patterned film formed on the substrate. A plurality of elongated parallel nanoslits is formed through the film defining a nanograting. The nanoslits may be spaced apart at a pitch selected to transmit a wavelength of light. The film is formed of a material having a thickness selected, such that when illuminated by incident light, surface plasmon resonances are excited at top and bottom surfaces of the film which interact and couple to form hybrid plasmon modes. The film changes between colored and transparent states when alternatingly illuminated with TM-polarized light or TE-polarized light, respectively. In one configuration, an array of nanogratings may be disposed on the substrate to form a transparent display system.Type: ApplicationFiled: November 6, 2014Publication date: May 7, 2015Inventors: FILBERT JOSEPH BARTOLI, YONGKANG GAO, BEIBEI ZENG
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Publication number: 20140218738Abstract: An optical device includes a transparent substrate and a conductive layer disposed over an upper surface of the transparent substrate. The conductive layer defines at least one groove inwardly extending from an upper surface and includes an aperture that is spaced apart from the at least one groove. An interface between the upper surface of the conductive layer and an ambient medium defines an optical branch along which surface plasmon polariton modes are excited in response to at least partially coherent light being received by the optical device.Type: ApplicationFiled: September 6, 2012Publication date: August 7, 2014Applicant: LEHIGH UNIVERSITYInventors: Filbert Bartoli, Qiaoqiang Gan, Yongkang Gao
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Patent number: 6811719Abstract: The disclosed invention relates to piezoelectric rare earth doped Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds including (zPb(ZrwTi(1−w))O3—(1−z)Pb(Mn1/3Sb2/3)O3+REx) where z is ≦0.95, 0.40<w<0.60, and where RE is a rare earth cation dopant, and 0<x<5.0%. The doped compounds have both improved Qm and (k). The RE dopants employed advantageously generate both “hardening” and “softening” effects in doped Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds. The RE doped Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds have advantageously high vibrational velocity compared to pure Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds and commercialized hard PZT. The disclosed invention also relates to piezoelectric devices which include the doped piezoelectric ceramic compounds.Type: GrantFiled: April 16, 2002Date of Patent: November 2, 2004Assignee: The Penn State Research FoundationInventors: Kenji Uchino, Yongkang Gao
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Publication number: 20030136939Abstract: The disclosed invention relates to piezoelectric rare earth doped Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds including (zPb(ZrwTi(1−w))O3−(1−z)Pb(Mn1/3Sb2/3)O3+REx) where z is ≦0.95, 0.40<w<0.60, and where RE is a rare earth cation dopant, and 0<x<5.0%. The doped compounds have both improved Qm and (k). The RE dopants employed advantageously generate both “hardening” and “softening” effects in doped Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds. The RE doped Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds have advantageously high vibrational velocity compared to pure Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds and commercialized hard PZT. The disclosed invention also relates to piezoelectric devices which include the doped piezoelectric ceramic compounds.Type: ApplicationFiled: April 16, 2002Publication date: July 24, 2003Applicant: The Penn State Research FoundationInventors: Kenji Uchino, Yongkang Gao