Patents by Inventor Yan Chai
Yan Chai 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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Patent number: 11917614Abstract: An uplink control information transmission method and apparatus. The method includes: determining, by a terminal device, a preamble that needs to be sent; determining, by the terminal device based on the preamble, a first resource set that is in a physical uplink shared channel resource and that is used to send uplink control information, where the PUSCH resource includes a plurality of resource sets; and sending, by the terminal device, the uplink control information and uplink data on the PUSCH resource, where the uplink control information is mapped to the first resource set, the uplink data is mapped to a resource that is other than the plurality of resource sets and that is in the PUSCH resource, and no information or uplink data is mapped to a resource set that is other than the first resource set and that is in the plurality of resource sets.Type: GrantFiled: September 28, 2021Date of Patent: February 27, 2024Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Xiaomeng Chai, Yiqun Wu, Yan Chen
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Publication number: 20220118139Abstract: The invention generally relates to a catheter sterilization system using semiconductor light emitting devices (LEDs) to sterilize the lumen of a catheter. The sterilization system may include a sterilization head with attached semiconductor LEDs sized for insertion into the catheter. The sterilization head is connected to the linearly extending connector allowing an operator to move the sterilization head through the catheter. The sterilization system may alternatively include microLEDs attached to the inner sidewalls of the catheter to sterilize the lumen of the catheter.Type: ApplicationFiled: October 20, 2021Publication date: April 21, 2022Applicant: LUMILEDS LLCInventors: Yan CHAI, Franklin CHIANG
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Patent number: 9893243Abstract: A light source includes LED dies that are flip-chip mounted on a flexible plastic substrate. The LED dies are attached to the substrate using an asymmetric conductor material with deformable conducting particles sandwiched between surface mount contacts on the LED dies and traces on the substrate. A diffusively reflective material containing light scattering particles is used instead of expensive reflective cups to reflect light upwards that is emitted sideways from the LED dies. The diffusively reflective material is dispensed over the top surface of the substrate and contacts the side surfaces of the dies. The light scattering particles are spheres of titanium dioxide suspended in silicone. The light source is manufactured in a reel-to-reel process in which the asymmetric conductor material and the diffusively reflective material are cured simultaneously. A silicone layer of molded lenses including phosphor particles is also added over the mounted LED dies in the reel-to-reel process.Type: GrantFiled: September 29, 2016Date of Patent: February 13, 2018Assignee: Bridgelux, Inc.Inventors: R. Scott West, Yan Chai
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Publication number: 20170018687Abstract: A light source includes LED dies that are flip-chip mounted on a flexible plastic substrate. The LED dies are attached to the substrate using an asymmetric conductor material with deformable conducting particles sandwiched between surface mount contacts on the LED dies and traces on the substrate. A diffusively reflective material containing light scattering particles is used instead of expensive reflective cups to reflect light upwards that is emitted sideways from the LED dies. The diffusively reflective material is dispensed over the top surface of the substrate and contacts the side surfaces of the dies. The light scattering particles are spheres of titanium dioxide suspended in silicone. The light source is manufactured in a reel-to-reel process in which the asymmetric conductor material and the diffusively reflective material are cured simultaneously. A silicone layer of molded lenses including phosphor particles is also added over the mounted LED dies in the reel-to-reel process.Type: ApplicationFiled: September 29, 2016Publication date: January 19, 2017Inventors: R. Scott West, Yan Chai
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Patent number: 9478719Abstract: A light source includes LED dies that are flip-chip mounted on a flexible plastic substrate. The LED dies are attached to the substrate using an asymmetric conductor material with deformable conducting particles sandwiched between surface mount contacts on the LED dies and traces on the substrate. A diffusively reflective material containing light scattering particles is used instead of expensive reflective cups to reflect light upwards that is emitted sideways from the LED dies. The diffusively reflective material is dispensed over the top surface of the substrate and contacts the side surfaces of the dies. The light scattering particles are spheres of titanium dioxide suspended in silicone. The light source is manufactured in a reel-to-reel process in which the asymmetric conductor material and the diffusively reflective material are cured simultaneously. A silicone layer of molded lenses including phosphor particles is also added over the mounted LED dies in the reel-to-reel process.Type: GrantFiled: April 13, 2011Date of Patent: October 25, 2016Assignee: Bridgelux, Inc.Inventors: R. Scott West, Yan Chai
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Patent number: 8482013Abstract: A light having a plurality of LEDs and a switching substrate is disclosed. The switching substrate is coupled to LEDs and includes a plurality of switches that provide a plurality of configurations for the LEDs. Each configuration is characterized by a two-dimensional array of LEDs having a minimum bias potential and a maximum bias potential, the LED array generating light when a bias potential is provided between the power terminals that is greater than the minimum bias potential, at least two configurations being operable to provide light at bias potential within this range. The switching substrate is sub-dividable into a plurality of identical multi-LED light sources by dividing the switching substrate along predetermined lines. The array of LEDs can be organized as a nested array of LEDs. The switches can be implemented as passive switches that are set by removing portions of conductors or bridging gaps in conductors.Type: GrantFiled: October 5, 2011Date of Patent: July 9, 2013Assignee: Bridgelux, Inc.Inventors: Yan Chai, Calvin B. Ward
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Patent number: 8455895Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of surface mount LEDs that are bonded to a mounting substrate by a layer of asymmetric conductor. Each LED has surface mount contacts on a first surface thereof and emits light from a second surface thereof that is opposite the first surface. The mounting substrate includes a top surface having a plurality of connection traces. Each connection trace includes an n-trace positioned to underlie a corresponding one of the n-contacts and a p-trace positioned to underlie a corresponding one of the p-contacts, the p-trace having an area greater than the p-contact. The layer of asymmetric conductor is sandwiched between the surface mount contacts and the connection traces, and can optionally extend into the spaces between the LEDs to provide a scattering medium for redirecting light leaving the sides of the LEDs.Type: GrantFiled: November 8, 2010Date of Patent: June 4, 2013Assignee: Bridgelux, Inc.Inventors: Yan Chai, Calvin B. Ward
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Publication number: 20130088160Abstract: A light having a plurality of LEDs and a switching substrate is disclosed. The switching substrate is coupled to LEDs and includes a plurality of switches that provide a plurality of configurations for the LEDs. Each configuration is characterized by a two-dimensional array of LEDs having a minimum bias potential and a maximum bias potential, the LED array generating light when a bias potential is provided between the power terminals that is greater than the minimum bias potential, at least two configurations being operable to provide light at bias potential within this range. The switching substrate is sub-dividable into a plurality of identical multi-LED light sources by dividing the switching substrate along predetermined lines. The array of LEDs can be organized as a nested array of LEDs. The switches can be implemented as passive switches that are set by removing portions of conductors or bridging gaps in conductors.Type: ApplicationFiled: October 5, 2011Publication date: April 11, 2013Inventors: Yan Chai, Calvin B. Ward
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Publication number: 20120112220Abstract: A light source includes LED dies that are flip-chip mounted on a flexible plastic substrate. The LED dies are attached to the substrate using an asymmetric conductor material with deformable conducting particles sandwiched between surface mount contacts on the LED dies and traces on the substrate. A diffusively reflective material containing light scattering particles is used instead of expensive reflective cups to reflect light upwards that is emitted sideways from the LED dies. The diffusively reflective material is dispensed over the top surface of the substrate and contacts the side surfaces of the dies. The light scattering particles are spheres of titanium dioxide suspended in silicone. The light source is manufactured in a reel-to-reel process in which the asymmetric conductor material and the diffusively reflective material are cured simultaneously. A silicone layer of molded lenses including phosphor particles is also added over the mounted LED dies in the reel-to-reel process.Type: ApplicationFiled: April 13, 2011Publication date: May 10, 2012Applicant: Bridgelux, Inc.Inventors: R. Scott West, Yan Chai
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Publication number: 20120112215Abstract: A light source and method for making the same are disclosed. The light source includes a plurality of surface mount LEDs that are bonded to a mounting substrate by a layer of asymmetric conductor. Each LED has surface mount contacts on a first surface thereof and emits light from a second surface thereof that is opposite the first surface. The mounting substrate includes a top surface having a plurality of connection traces. Each connection trace includes an n-trace positioned to underlie a corresponding one of the n-contacts and a p-trace positioned to underlie a corresponding one of the p-contacts, the p-trace having an area greater than the p-contact. The layer of asymmetric conductor is sandwiched between the surface mount contacts and the connection traces, and can optionally extend into the spaces between the LEDs to provide a scattering medium for redirecting light leaving the sides of the LEDs.Type: ApplicationFiled: November 8, 2010Publication date: May 10, 2012Inventors: Yan Chai, Calvin B. Ward
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Publication number: 20070231589Abstract: A process for applying a coating upon an article includes the steps of applying upon at least one surface of an article a bond coat layer composed of a bond coat material and at least one metal selected from the group consisting of magnesium, calcium, strontium, silicon, rare earth metals, Group 3A of the Periodic Table of Elements and Group 4A of the Periodic Table of Elements; oxidizing the at least one metal to form at least one surface variation on an exposed surface of the bond coat layer and to form a thermally grown oxide layer upon the bond coat layer; and applying a thermal barrier coating layer upon said thermally grown oxide layer to produce a coated article.Type: ApplicationFiled: April 4, 2006Publication date: October 4, 2007Inventors: John G. Smeggil, Yan Chai, Mark T. Ucasz
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Patent number: 6471881Abstract: A method is disclosed for providing a TBC system including grooves or other features between the bond coat/substrate and the ceramic thermally insulating layer. The features are initially provided by selectively removing material to define the features, for example by laser. Any disturbed surface layer, e.g., re-cast material in the case of a laser or plastically worked material in the case of machining, is then chemically removed, leaving the remaining material with a microstructure of a more uniform geometry, and free of disturbed material. The ceramic layer is then applied. TBC systems using the method show improved durability, with lives up to 4× longer than prior TBC systems.Type: GrantFiled: November 23, 1999Date of Patent: October 29, 2002Assignee: United Technologies CorporationInventors: Yan Chai, Gary M. Lomasney, Keith Douglas Sheffler