Patents by Inventor Yongchi Tian

Yongchi Tian 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: 20130207537
    Abstract: A red phosphor is provided. Also provided is a lighting apparatus containing a red phosphor.
    Type: Application
    Filed: August 29, 2012
    Publication date: August 15, 2013
    Applicant: LIGHTSCAPE MATERIALS, INC.
    Inventors: Yuan Qiang Li, Michael D. Romanelli, Yongchi Tian
  • Publication number: 20120212122
    Abstract: Disclosed herein is a novel group of carbonitride and carbidonitride phosphors and light emitting devices which utilize these phosphors. In certain embodiments, the inventive phosphors are expressed as follows: Cam/2Si12-(m+n)?xCxAlm+nN16-nOn:EU2+??(1) M(II)m/2Si12-(m+n)?xCxM(III)m+nN16-nOn-y/2Hy:A??(2) Mm/vSi12-(m+n)?xCxM(III)m+nN16-nOn-y/2Hy:A??(3) Cam/2Si12-(m+n)+xAlm+n?xN16-n?xCxOn:Eu2+??(4) M(II)m/2Si12-(m+n)+xM(III)m+n?xN16-n?xCxOn-y/2Hy:A??(5) Mm/vSi12-(m+n)+xM(III)m+n?xN16-n?xCxOn-y/2Hy:A??(6) wherein v is the valence number of M, 0?m<5, 0?n?3, 0?x<4, and 0?y<1, M is at least one cation, M(II) is at least one divalent cation, M(III) is at least one trivalent cation, H is at least one monovalent anion, and A is a luminescence activator.
    Type: Application
    Filed: January 13, 2012
    Publication date: August 23, 2012
    Applicant: LIGHTSCAPE MATERIALS, INC.
    Inventors: Alan Thomas, Yuanqiang Li, Yongchi Tian
  • Patent number: 8242525
    Abstract: Disclosed herein is a group of phosphors of the formula M2(SiO4)1-x-y-z(TiO4)x(ZrO4)y(HfO4)z:A,S and light emitting devices which utilize these phosphors.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: August 14, 2012
    Assignee: Lightscape Materials, Inc.
    Inventors: Yongchi Tian, Perry Niel Yocom, Olga Zakharov, Alison Sides, Alan C. Thomas
  • Publication number: 20120062105
    Abstract: Disclosed herein are novel families of silicon carbidonitride phosphor compositions. In certain embodiments, optimal ranges of carbon content have been identified which provide excellent luminescence and thermal stability characteristics.
    Type: Application
    Filed: June 20, 2011
    Publication date: March 15, 2012
    Applicant: LIGHTSCAPE MATERIALS, INC.
    Inventors: Yuanqiang Li, Michael Dennis Romanelli, Yongchi Tian
  • Publication number: 20110279017
    Abstract: Disclosed herein is a novel family of oxycarbonitride phosphor compositions and light emitting devices incorporating the same. Within the sextant system of M-Al—Si—O—N—C-Ln and quintuplet system of M-Si—O—N—C-Ln (M=alkaline earth element, Ln=rare earth element), the phosphors are composed of either one single crystalline phase or two crystalline phases with high chemical and thermal stability. In certain embodiments, the disclosed phosphor of silicon oxycarbonitrides emits green light at wavelength between 530-550 nm. In further embodiments, the disclosed phosphor compositions emit blue-green to yellow light in a wavelength range of 450-650 nm under near-UV and blue light excitation.
    Type: Application
    Filed: March 11, 2011
    Publication date: November 17, 2011
    Applicant: LIGHTSCAPE MATERIALS, INC.
    Inventors: Yuanqiang Li, Yongchi Tian, Michael Dennis Romanelli
  • Publication number: 20110279016
    Abstract: Disclosed herein is a novel group of carbidonitride phosphors and light emitting devices which utilize these phosphors. In certain embodiments, the present invention is directed to a novel family of carbidonitride-based phosphors expressed as follows: Ca1-xAlx-xySi1-x+xyN2-x-xyCxy:A??(1); Ca1-x-zNazM(III)x-xy-zSi1-x+xy+zN2-x-xyCxy:A??(2); M(II)1-x-zM(I)zM(III)x-xy-zSi1-x+xy+zN2-x-xyCxy:A??(3); M(II)1-x-zM(I)zM(III)x-xy-zSi1-x+xy+zN2-x-xy-2w/3CxyOw-v/2Hv:A??(4); and M(II)1-x-zM(I)zM(III)x-xy-zSi1-x+xy+zN2-x-xy-2w/3-v/3CxyOwHv:A??(4a), wherein 0<x<1, 0<y<1, 0?z<1, 0?v<1, 0<w<1, x+z<1, x>xy+z, and 0<x-xy-z<1, M(II) is at least one divalent cation, M(I) is at least one monovalent cation, M(III) is at least one trivalent cation, H is at least one monovalent anion, and A is a luminescence activator doped in the crystal structure.
    Type: Application
    Filed: July 19, 2010
    Publication date: November 17, 2011
    Inventors: Yuanqiang Li, Yongchi Tian, Michael Dennis Romanelli
  • Patent number: 7713442
    Abstract: The present invention relates to metal silicate halide (halosilicate) phosphors, the phosphors with an oxide coating, methods of making the phosphors, and light emitting diode- (LED-) based lighting devices modified with the phosphors.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: May 11, 2010
    Assignee: Lightscape Materials, Inc.
    Inventors: Yongchi Tian, Olga Zakharov, Alison Sides
  • Publication number: 20090289271
    Abstract: Disclosed herein is a group of phosphors of the formula M2(SiO4)1-x-y-z(TiO4)x(ZrO4)y(HfO4)z:A,S and light emitting devices which utilize these phosphors.
    Type: Application
    Filed: May 20, 2009
    Publication date: November 26, 2009
    Applicant: LIGHTSCAPE MATERIALS, INC.
    Inventors: Yongchi Tian, Perry Niel Yocom, Olga Zakharov, Alison Sides, Alan C. Thomas
  • Patent number: 7427366
    Abstract: Provided among other things is a phosphor of the formula Sr1-x3Cax3Ga2S4:Eu:xGa2S3??(I) wherein x is 0 to about 0.2 (or about 0.0001 to about 0.2), wherein x3 is 0.0001 to 1, and wherein a minor part of the europium component is substituted with praseodymium in an efficiency enhancing amount.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: September 23, 2008
    Assignee: Sarnoff Corporation
    Inventors: Yongchi Tian, Perry Niel Yocom, Gerard Frederickson, Liyou Yang
  • Publication number: 20080128679
    Abstract: The present invention relates to metal silicate halide (halosilicate) phosphors, the phosphors with an oxide coating, methods of making the phosphors, and light emitting diode- (LED-) based lighting devices modified with the phosphors.
    Type: Application
    Filed: September 28, 2007
    Publication date: June 5, 2008
    Inventors: Yongchi Tian, Olga Zakharov, Alison Sides
  • Patent number: 7368179
    Abstract: The present invention provides a light emitting device comprising: a light output; a light source that produces light having a wavelengths of 530 nm or less; and a wavelength transformer located between the light source and the light output, where the wavelength transformer comprises Sr1-xCaxGa2S4: yEu2+·zGa2S3, where x is 0.0001 to 1, y is a value defining sufficient Eu2+ to provide luminescent emission, and z is 0.0001 to 0.2 based on the mole amount of SrxCa1-xGa2S4, and where the wavelength transformer effectively increases the light at the light output, the light having a wavelength between 535 nm and 560 nm.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: May 6, 2008
    Assignee: Sarnoff Corporation
    Inventors: Yongchi Tian, Diane Zaremba, Perry Niel Yocom
  • Patent number: 7276183
    Abstract: Provided, among other things, is a phosphor according to the formula: [(BvSiO3)x(Mv2SiO3)y(Tv2(SiO3)3)z]m•(SiO2)n: R?, X??(I) wherein x, y and z are any value such that x+y+z=1; Bv is one or more divalent alkaline earth metals; Mv is one or more monovalent alkaline metals; Tv is one or more trivalent metal ions; R? is one or more activators selected from Eu2+ and Mn2+; X is one or more halides; m is 1 or 0; and (i) n>3 if m=1 and provides an amount of silica effective to host useful luminescence or (ii) n=1 if m=0.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: October 2, 2007
    Assignee: Sarnoff Corporation
    Inventor: Yongchi Tian
  • Publication number: 20070125984
    Abstract: The present invention provides-a photoluminescent phosphor coated with a coating of oxide, the phosphor comprising (1) an inorganic phosphor chosen from (a) a metal thiogallate phosphor and (b) a metal sulfide phosphor and (2) a coating that comprises at least one layer having at least one oxides. The coated photoluminescent phosphor of the present invention is more resistant to water-induced degradation than when it is uncoated.
    Type: Application
    Filed: June 19, 2006
    Publication date: June 7, 2007
    Inventors: Yongchi Tian, Perry Yocom, Liyou Yang, Gerard Frederickson, Robert Simms
  • Publication number: 20070125982
    Abstract: The present invention relates to certain metal silicate halide (halosilicate) phosphors, the phosphors with an oxide coating, methods of making the phosphors, and light emitting diode- (LED-) based lighting devices modified with the phosphors.
    Type: Application
    Filed: September 27, 2006
    Publication date: June 7, 2007
    Inventors: Yongchi Tian, Perry Yocom, Sawsan Aziz, Olga Zakharov, Alison Sides
  • Patent number: 7125501
    Abstract: Provided, among other things, is a strontium calcium thiogallate phosphor doped with divalent europium, and having the following formula: Sr1-xCaxGa2S4:yEu2+.zGa2S3, where x is 0.0001 to 1, y is a value defining sufficient Eu2+ to provide luminescent emission, and z is 0.0001 to 0.2 based on the mole amount of Sr1-xCaxGa2S4:yEu2+.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: October 24, 2006
    Assignee: Sarnoff Corporation
    Inventors: Yongchi Tian, Diane Zaremba, Perry Niel Yocom
  • Publication number: 20060214175
    Abstract: Provided, among other things, is a phosphor according to the formula: [(BvSiO3)x(Mv2SiO3)y(Tv2(SiO3)3)z]m.(SiO2)n:R?, X??(I) wherein x, y and z are any value such that x+y+z=1; By is one or more divalent alkaline earth metals; Mv is one or more monovalent alkaline metals; Tv is one or more trivalent metal ions; R? is one or more activators selected from Eu2+ and Mn2+; X is one or more halides; m is 1 or 0; and (i) n>3 if m=1 and provides an amount of silica effective to host useful luminescence or (ii) n=1 if m=0.
    Type: Application
    Filed: June 10, 2005
    Publication date: September 28, 2006
    Inventor: Yongchi Tian
  • Patent number: 7018565
    Abstract: Provided among other things is a method of forming a phosphor of the formula SrGa2S4:Eu:xGa2S3??(I) wherein x is 0.0001 to 0.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: March 28, 2006
    Assignee: Sarnoff Corporation
    Inventors: Yongchi Tian, Diane Zaremba, Perry Niel Yocom
  • Patent number: 7008547
    Abstract: Provided is a solid phase array of electrical sensors, each comprising a channel and electrical leads for attaching to a voltage, current or resistivity meter for measuring the voltage, current or resistivity through the pore, wherein the channels are formed of a single substrate.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: March 7, 2006
    Assignee: Sarnoff Corporation
    Inventors: Jia Ming Chen, Yongchi Tian, Zilan Shen, Pradyumna Swain
  • Publication number: 20060017041
    Abstract: Provided, among other things, is a phosphor according to the formula: A. a phosphor according to the following formula MfSiaAlbBcNdOg:R?,Z ??(A); or B. a phosphor according to the following formula Msn:R?,Z2 ??(B) wherein Msn is a silicon nitride or silicon nitride-oxide of one of: (Mx1M1?x2)(Si5N8):R?,Z2 ??(i) Lsno:R?,Z2 ??(ii) Ln2Si3?zAlzO3+zN4?z:R?,Z2 ??(iii) Lsno is a lanthanide silicon nitride-oxide of one of: Ln(SiO4)N3:R?,Z2 ??(iia) LnSi2O7N2:R?,Z2 ??(iib) LnSiO2N:R?,Z2 ??(iic) Ln2SiO3N4:R?,Z2 ??(iid) Ln2Si8O4N11:R?,Z2 ??(iie); or Mn3Si3?yBO3+yN4?y:R?,Z3 ??(C); or Mf14Sia1Alb1Bc1Nd1-e1-g1Og1De1:R?Z4 ??(D) wherein D is P, Bi, Sb, As or a mixture thereof, and R?, R?, R? and R? are activators, and M, M1, M2, M3 and M4 are cations.
    Type: Application
    Filed: June 24, 2005
    Publication date: January 26, 2006
    Applicant: Sarnoff Corporation
    Inventors: Yongchi Tian, Perry Yocom
  • Publication number: 20060012287
    Abstract: Provided among other things is a phosphor of the formula Sr1-x3Cax3Ga2S4:Eu:xGa2S3 ??(I) wherein x is 0 to about 0.2 (or about 0.0001 to about 0.2), wherein x3 is 0.0001 to 1, and wherein a minor part of the europium component is substituted with praseodymium in an efficiency enhancing amount.
    Type: Application
    Filed: July 5, 2005
    Publication date: January 19, 2006
    Inventors: Yongchi Tian, Perry Yocom, Gerard Frederickson, Liyou Yang