Patents by Inventor Ryan Gresback
Ryan Gresback 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).
-
Publication number: 20220093830Abstract: A stabilized fluoride phosphor for light emitting diode (LED) applications includes a particle comprising manganese-activated potassium fluorosilicate and an inorganic coating on each of the particles. The inorganic coating comprises a silicate. A method of making a stabilized fluoride phosphor comprises forming a reaction mixture that includes particles comprising a manganese-activated potassium fluorosilicate; a reactive silicate precursor; a catalyst; a solvent; and water in an amount no greater than about 10 vol. %. The reaction mixture is agitated to suspend the particles therein. As the reactive silicate precursor undergoes hydrolysis and condensation in the reaction mixture, an inorganic coating comprising a silicate is formed on the particles. Thus, a stabilized fluoride phosphor is formed.Type: ApplicationFiled: December 2, 2021Publication date: March 24, 2022Applicant: CREELED, INC.Inventors: Ryan Gresback, Kenneth Lotito, Linjia Mu
-
Patent number: 11251342Abstract: A stabilized fluoride phosphor for light emitting diode (LED) applications includes a particle comprising manganese-activated potassium fluorosilicate and an inorganic coating on each of the particles. The inorganic coating comprises a silicate. A method of making a stabilized fluoride phosphor comprises forming a reaction mixture that includes particles comprising a manganese-activated potassium fluorosilicate; a reactive silicate precursor; a catalyst; a solvent; and water in an amount no greater than about 10 vol. %. The reaction mixture is agitated to suspend the particles therein. As the reactive silicate precursor undergoes hydrolysis and condensation in the reaction mixture, an inorganic coating comprising a silicate is formed on the particles. Thus, a stabilized fluoride phosphor is formed.Type: GrantFiled: February 19, 2020Date of Patent: February 15, 2022Assignee: CREELED, INC.Inventors: Ryan Gresback, Kenneth Lotito, Linjia Mu
-
Patent number: 11222996Abstract: A stabilized fluoride phosphor for light emitting diode (LED) applications includes a particle comprising manganese-activated potassium fluorosilicate and an inorganic coating on each of the particles. The inorganic coating comprises a silicate. A method of making a stabilized fluoride phosphor comprises forming a reaction mixture that includes particles comprising a manganese-activated potassium fluorosilicate; a reactive silicate precursor; a catalyst; a solvent; and water in an amount no greater than about 10 vol. %. The reaction mixture is agitated to suspend the particles therein. As the reactive silicate precursor undergoes hydrolysis and condensation in the reaction mixture, an inorganic coating comprising a silicate is formed on the particles. Thus, a stabilized fluoride phosphor is formed.Type: GrantFiled: February 19, 2020Date of Patent: January 11, 2022Assignee: CREELED, INC.Inventors: Ryan Gresback, Kenneth Lotito, Linjia Mu
-
Patent number: 10879433Abstract: A stabilized quantum dot composite includes a plurality of luminescent semiconducting nanoparticles embedded in a matrix comprising an ionic metal oxide. A method of making a stabilized quantum dot composite includes forming a mixture comprising a plurality of luminescent semiconducting nanoparticles dispersed in an aqueous solution comprising an ionic metal oxide. The mixture is dried to form a stabilized quantum dot composite comprising the plurality of luminescent semiconducting nanoparticles embedded in a matrix comprising the ionic metal oxide.Type: GrantFiled: May 22, 2019Date of Patent: December 29, 2020Assignee: CREE, INC.Inventors: Kenneth Lotito, Ryan Gresback, Ceri Griffiths, Paul Fini
-
Stabilized luminescent nanoparticles comprising a perovskite semiconductor and method of fabrication
Patent number: 10741730Abstract: Stabilized luminescent nanoparticles for light emitting diode applications comprise perovskite nanocrystals encapsulated by an oxide coating, where the oxide coating includes ligand remnants comprising one or more elements selected from the group consisting of: nitrogen, carbon, phosphorus, and sulfur. A method of making the stabilized luminescent nanoparticles comprises dispersing perovskite nanocrystals and crosslinking ligands in a non-polar solvent to form a first mixture. Each of the crosslinking ligands comprises a head end and a tail end; the head ends attach to the perovskite nanocrystals and the tail ends remain unattached and available for crosslinking. An oxide precursor comprising crosslinking functional groups is added to the first mixture, and the crosslinking functional groups attach to the tail ends of the crosslinking ligands. Thus, an oxide coating is formed on the perovskite nanocrystals.Type: GrantFiled: November 10, 2017Date of Patent: August 11, 2020Assignee: CREE, INC.Inventors: Linjia Mu, Kenneth Lotito, Ryan Gresback -
Publication number: 20200232610Abstract: A laser-based fiber-coupled white light system is provided. The system includes a laser device comprising a gallium and nitrogen containing emitting region having an output facet configured to output a laser emission with a first wavelength ranging from 385 nm to 495 nm. The system further includes a phosphor member integrated with light collimation elements. The phosphor member converts the laser emission with the first wavelength to a phosphor emission with a second wavelength in either reflective or transmissive mode and mixed partially with laser emission to produce a white light emission. The system includes a transport fiber coupled to the phosphor member via the light collimation elements to receive the white light emission and deliver the white light emission remotely to one or more passive luminaries substantially free of electrical or moving parts disposed at remote distances from a dedicated source area.Type: ApplicationFiled: October 9, 2019Publication date: July 23, 2020Inventors: James W. Raring, Paul Rudy, Sten Heikman, Ryan Gresback, Julian Carey
-
Publication number: 20200232611Abstract: A laser-based fiber-coupled white light system is provided. The system includes a laser device comprising a gallium and nitrogen containing emitting region having an output facet configured to output a laser emission with a first wavelength ranging from 385 nm to 495 nm. The system further includes a phosphor member integrated with light collimation elements. The phosphor member converts the laser emission with the first wavelength to a phosphor emission with a second wavelength in either reflective or transmissive mode and mixed partially with laser emission to produce a white light emission. The system includes a transport fiber coupled to the phosphor member via the light collimation elements to receive the white light emission and deliver the white light emission remotely to one or more passive luminaries substantially free of electrical or moving parts disposed at remote distances from a dedicated source area.Type: ApplicationFiled: October 9, 2019Publication date: July 23, 2020Inventors: James W. Raring, Paul Rudy, Sten Heikman, Ryan Gresback, Julian Carey
-
Publication number: 20200185572Abstract: A stabilized fluoride phosphor for light emitting diode (LED) applications includes a particle comprising manganese-activated potassium fluorosilicate and an inorganic coating on each of the particles. The inorganic coating comprises a silicate. A method of making a stabilized fluoride phosphor comprises forming a reaction mixture that includes particles comprising a manganese-activated potassium fluorosilicate; a reactive silicate precursor; a catalyst; a solvent; and water in an amount no greater than about 10 vol. %. The reaction mixture is agitated to suspend the particles therein. As the reactive silicate precursor undergoes hydrolysis and condensation in the reaction mixture, an inorganic coating comprising a silicate is formed on the particles. Thus, a stabilized fluoride phosphor is formed.Type: ApplicationFiled: February 19, 2020Publication date: June 11, 2020Applicant: Cree, Inc.Inventors: Ryan Gresback, Kenneth Lotito, Linjia Mu
-
Patent number: 10608148Abstract: A stabilized fluoride phosphor for light emitting diode (LED) applications includes a particle comprising manganese-activated potassium fluorosilicate and an inorganic coating on each of the particles. The inorganic coating comprises a silicate. A method of making a stabilized fluoride phosphor comprises forming a reaction mixture that includes particles comprising a manganese-activated potassium fluorosilicate; a reactive silicate precursor; a catalyst; a solvent; and water in an amount no greater than about 10 vol. %. The reaction mixture is agitated to suspend the particles therein. As the reactive silicate precursor undergoes hydrolysis and condensation in the reaction mixture, an inorganic coating comprising a silicate is formed on the particles. Thus, a stabilized fluoride phosphor is formed.Type: GrantFiled: May 31, 2018Date of Patent: March 31, 2020Assignee: Cree, Inc.Inventors: Ryan Gresback, Kenneth Lotito, Linjia Mu
-
Patent number: 10541353Abstract: A light emitting device includes a light emitting diode (“LED”), a first luminescent material that is configured to emit light having an emission peak in a green wavelength range, and a second luminescent material that is configured to emit narrow-spectrum light having an emission peak in an orange wavelength range. A light output of the light emitting device, which includes a portion of the light emitted by the LED, the light having the emission peak in the green wavelength range, and the light having the emission peak in the orange wavelength range, provides an appearance of white light. Related devices are also discussed.Type: GrantFiled: November 10, 2017Date of Patent: January 21, 2020Assignee: Cree, Inc.Inventors: Linjia Mu, Kenneth Lotito, Ryan Gresback
-
Solid state lighting device providing spectral power distribution with enhanced perceived brightness
Patent number: 10529900Abstract: A solid state lighting device includes at least one electrically activated solid state light emitter configured to stimulate emissions of first through third lumiphoric materials having peak wavelengths in ranges of from 485 nm to 530 nm, from 575 nm to 595 nm, and from 605 nm to 640 nm, respectively (or subranges thereof defined herein), with the third peak having a full width half maximum value of less than 60 nm. The resulting device generates aggregated emissions having a suitably high color rendering index (e.g., CRI Ra) value (e.g., at least 70), and also having a spectral power distribution with a Melanopic/Photopic ratio within a specified target range as a function of correlated color temperature, thereby providing increased perceived brightness.Type: GrantFiled: May 5, 2018Date of Patent: January 7, 2020Assignee: IDEAL Industries Lighting LLCInventors: Fan Zhang, Ryan Gresback, James Ibbetson, Bernd Keller, Antony Paul Van De Ven -
Publication number: 20190371973Abstract: A stabilized fluoride phosphor for light emitting diode (LED) applications includes a particle comprising manganese-activated potassium fluorosilicate and an inorganic coating on each of the particles. The inorganic coating comprises a silicate. A method of making a stabilized fluoride phosphor comprises forming a reaction mixture that includes particles comprising a manganese-activated potassium fluorosilicate; a reactive silicate precursor; a catalyst; a solvent; and water in an amount no greater than about 10 vol. %. The reaction mixture is agitated to suspend the particles therein. As the reactive silicate precursor undergoes hydrolysis and condensation in the reaction mixture, an inorganic coating comprising a silicate is formed on the particles. Thus, a stabilized fluoride phosphor is formed.Type: ApplicationFiled: May 31, 2018Publication date: December 5, 2019Applicant: Cree, Inc.Inventors: Ryan Gresback, Kenneth Lotito, Linjia Mu
-
SOLID STATE LIGHTING DEVICE PROVIDING SPECTRAL POWER DISTRIBUTION WITH ENHANCED PERCEIVED BRIGHTNESS
Publication number: 20190341531Abstract: A solid state lighting device includes at least one electrically activated solid state light emitter configured to stimulate emissions of first through third lumiphoric materials having peak wavelengths in ranges of from 485 nm to 530 nm, from 575 nm to 595 nm, and from 605 nm to 640 nm, respectively (or subranges thereof defined herein), with the third peak having a full width half maximum value of less than 60 nm. The resulting device generates aggregated emissions having a suitably high color rendering index (e.g., CRI Ra) value (e.g., at least 70), and also having a spectral power distribution with a Melanopic/Photopic ratio within a specified target range as a function of correlated color temperature, thereby providing increased perceived brightness.Type: ApplicationFiled: May 5, 2018Publication date: November 7, 2019Inventors: Fan Zhang, Ryan Gresback, James Ibbetson, Bernd Keller, Antony Paul Van de Ven -
Publication number: 20190273189Abstract: A stabilized quantum dot composite includes a plurality of luminescent semiconducting nanoparticles embedded in a matrix comprising an ionic metal oxide. A method of making a stabilized quantum dot composite includes forming a mixture comprising a plurality of luminescent semiconducting nanoparticles dispersed in an aqueous solution comprising an ionic metal oxide. The mixture is dried to form a stabilized quantum dot composite comprising the plurality of luminescent semiconducting nanoparticles embedded in a matrix comprising the ionic metal oxide.Type: ApplicationFiled: May 22, 2019Publication date: September 5, 2019Applicant: Cree, Inc.Inventors: Kenneth Lotito, Ryan Gresback, Ceri Griffiths, Paul Fini
-
Patent number: 10347799Abstract: A stabilized quantum dot composite includes a plurality of luminescent semiconducting nanoparticles embedded in a matrix comprising an ionic metal oxide. A method of making a stabilized quantum dot composite includes forming a mixture comprising a plurality of luminescent semiconducting nanoparticles dispersed in an aqueous solution comprising an ionic metal oxide. The mixture is dried to form a stabilized quantum dot composite comprising the plurality of luminescent semiconducting nanoparticles embedded in a matrix comprising the ionic metal oxide.Type: GrantFiled: November 10, 2017Date of Patent: July 9, 2019Assignee: Cree, Inc.Inventors: Kenneth Lotito, Ryan Gresback, Ceri Griffiths, Paul Fini
-
Patent number: 10349484Abstract: Solid state lighting devices with melatonin suppression characteristics that ameliorate or reduce symptoms of circadian rhythm disorders or other health conditions. Aspects disclosed herein additionally relate to providing one or more of the foregoing effects while maintaining color rendering index (CRI) values acceptably high for the intended use, as well as providing lighting devices with high luminous efficacy and enhanced energy efficiency. A solid state lighting device includes one or more solid state emitters and one or more lumiphoric materials that provide aggregated emissions of the solid state lighting device. The aggregated emissions have a warm correlated color temperature (CCT) with a color point that is off of the blackbody locus (BBL) by a certain distance.Type: GrantFiled: May 31, 2018Date of Patent: July 9, 2019Assignee: CREE, INC.Inventors: Fan Zhang, Ryan Gresback, Antony Paul van de Ven, Robert Glass, Bernd P. Keller
-
Publication number: 20190148605Abstract: A light emitting device includes a light emitting diode (“LED”), a first luminescent material that is configured to emit light having an emission peak in a green wavelength range, and a second luminescent material that is configured to emit narrow-spectrum light having an emission peak in an orange wavelength range. A light output of the light emitting device, which includes a portion of the light emitted by the LED, the light having the emission peak in the green wavelength range, and the light having the emission peak in the orange wavelength range, provides an appearance of white light. Related devices are also discussed.Type: ApplicationFiled: November 10, 2017Publication date: May 16, 2019Inventors: Linjia Mu, Kenneth Lotito, Ryan Gresback
-
Publication number: 20190148603Abstract: A stabilized quantum dot composite includes a plurality of luminescent semiconducting nanoparticles embedded in a matrix comprising an ionic metal oxide. A method of making a stabilized quantum dot composite includes forming a mixture comprising a plurality of luminescent semiconducting nanoparticles dispersed in an aqueous solution comprising an ionic metal oxide. The mixture is dried to form a stabilized quantum dot composite comprising the plurality of luminescent semiconducting nanoparticles embedded in a matrix comprising the ionic metal oxide.Type: ApplicationFiled: November 10, 2017Publication date: May 16, 2019Applicant: Cree, Inc.Inventors: Kenneth Lotito, Ryan Gresback, Ceri Griffiths, Paul Fini
-
STABILIZED LUMINESCENT NANOPARTICLES COMPRISING A PEROVSKITE SEMICONDUCTOR AND METHOD OF FABRICATION
Publication number: 20190148602Abstract: Stabilized luminescent nanoparticles for light emitting diode applications comprise perovskite nanocrystals encapsulated by an oxide coating, where the oxide coating includes ligand remnants comprising one or more elements selected from the group consisting of: nitrogen, carbon, phosphorus, and sulfur. A method of making the stabilized luminescent nanoparticles comprises dispersing perovskite nanocrystals and crosslinking ligands in a non-polar solvent to form a first mixture. Each of the crosslinking ligands comprises a head end and a tail end; the head ends attach to the perovskite nanocrystals and the tail ends remain unattached and available for crosslinking. An oxide precursor comprising crosslinking functional groups is added to the first mixture, and the crosslinking functional groups attach to the tail ends of the crosslinking ligands. Thus, an oxide coating is formed on the perovskite nanocrystals.Type: ApplicationFiled: November 10, 2017Publication date: May 16, 2019Applicant: Cree, Inc.Inventors: Linjia Mu, Kenneth Lotito, Ryan Gresback -
Patent number: 9780266Abstract: A stabilized quantum dot structure for use in a light emitting diode (LED) comprises, according to one embodiment, a luminescent particle comprising one or more semiconductors, a buffer layer overlying the luminescent particle, where the buffer layer comprises an amorphous material, and a barrier layer overlying the buffer layer, where the barrier layer comprises oxygen, nitrogen and/or carbon. According to another embodiment, the stabilized quantum dot structure includes a luminescent particle comprising one or more semiconductors, and a treated buffer layer comprising amorphous silica overlying the luminescent particle, where the stabilized quantum dot structure exhibits a quantum yield of at least about 0.7 when exposed to a blue light flux of about 30 W/cm2 at a temperature of 80-85° C. and relative humidity of 5% for 500 hours.Type: GrantFiled: June 29, 2016Date of Patent: October 3, 2017Assignee: Cree, Inc.Inventors: Kenneth Lotito, Ryan Gresback, Paul Fini, James Ibbetson, Bernd Keller