Including Particular Phosphor Patents (Class 313/486)
  • Patent number: 10365551
    Abstract: A wavelength conversion member comprises: a substrate; and a wavelength conversion layer. The wavelength conversion layer contains a first phosphor and a second phosphor. The second phosphor has a higher thermal conductivity than the first phosphor. In the wavelength conversion layer, a volume of the second phosphor is larger than a volume of the first phosphor. The wavelength conversion layer includes a first portion and a second portion. The first portion is located closer to the substrate than the second portion, and is in direct contact with the second portion. Thicknesses of the first portion and the second portion are equal to each other. A volume V11 of the first phosphor in the first portion, a volume V12 of the second phosphor in the first portion, a volume V21 of the first phosphor in the second portion, and a volume V22 of the second phosphor in the second portion satisfy V11/V12<V21/V22.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: July 30, 2019
    Assignee: PANASONIC CORPORATION
    Inventors: Yoshihisa Nagasaki, Takashi Ohbayashi, Kojiro Okuyama
  • Patent number: 10359559
    Abstract: The invention provides an optical film assembly, a backlight module, and a display device. The backlight module includes a light source emitting at least a first light, a first optical film, and a second optical film laminated to the first optical film, wherein the first optical film includes a functional layer but does not include a base film, the functional layer is a diffusion film, a brightness enhancement film, a reflection film, or a prism film, and the second optical film is a light conversion layer, the light conversion layer receives the first light and converts the first light to at least a second light to emit, such that a light emission angle of the backlight module matches a requirement of wide viewing angle. The invention could broaden the light emitting angle of the backlight module to make the display device with the backlight module achieve wide viewing angle.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: July 23, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventors: Jianyu Chang, Yung-jui Lee, Yu-chun Hsiao, Sheng-Jer Chang Chien, Zanjia Su, Bo Hai
  • Patent number: 10352528
    Abstract: A lamp is provided that includes a glass tube body composed of a glass composition that includes an optical diffusive agent to increase the light diffusivity of the glass tube body. The lamp can include a glass tube body having a perimeter defined by a sidewall of the glass tube body for enclosing a hollow interior. The glass tube body is composed of a sodium silicate glass including an optically diffusive agent that is alloyed with a silicate base glass composition. The optically diffusive agent can be selected from lithium borosilicate, titanium dioxide, antimony trioxide or combinations thereof. The lamp can further include at least one light emitting diode (LED) on a substrate that provides the light source. The at least one light emitting diode (LED) that is present on the substrate is positioned within the hollow interior of the glass tube body.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: July 16, 2019
    Assignee: LEDVANCE LLC
    Inventors: Philip Rioux, Shiyong Zhang
  • Patent number: 10096749
    Abstract: An illumination light source emits white light resulting from mixing of light emitted from an LED chip and light emitted from a plurality of phosphors. A light emission spectrum of the white light has a peak in a wavelength range from 430 nm to 460 nm. In the light emission spectrum, a proportion of optical intensity at a wavelength of 510 nm relative to optical intensity at the peak is 0.45 or more, and a proportion of optical intensity at a wavelength of 580 nm relative to the optical intensity at the peak is 0.60 or more. Furthermore, in the light emission spectrum, a proportion of optical intensity at a wavelength of 650 nm relative to the optical intensity at the wavelength of 580 nm is 0.4 or less.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: October 9, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Naoko Takei
  • Patent number: 10074782
    Abstract: A light emitting device includes a light emitting element adapted to emit blue light, quantum dots that absorb part of the blue light emitted from the light emitting element to emit green light, and at least one of a KSF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light and a MGF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: September 11, 2018
    Assignee: NICHIA CORPORATION
    Inventors: Kenji Kawano, Atsushi Yamamoto
  • Patent number: 10008687
    Abstract: This disclosure relates to an OLED display apparatus and the preparation method thereof. The OLED display apparatus comprises, from the bottom to the top, a substrate, an OLED device, a thin film inner layer, an ethylcellulose layer, and a thin film outer layer. By adding a hydrophobic ethylcellulose layer with a photosensitive material and a singlet oxygen receptor dissolved therein on the basis of current thin film packaging, this invention can have the functions of water vapor barrier and oxygen absorption so as to improve the service life of devices.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: June 26, 2018
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yajun Li, Yang-Sik Youn, Zhihai Zhang
  • Patent number: 9997678
    Abstract: An object of the present invention is to provide a light-emitting device that can implement a natural, vivid, highly visible and comfortable appearance of colors and appearance of objects as if the objects are seen outdoors, and to provide a light-emitting device that can change the appearance of colors of the illuminated objects so as to satisfy the requirements for various illuminations, and a method for designing thereof. Another object of the present invention is to improve the appearance of colors of a light-emitting device which currently exists or is in use, and which includes a semiconductor light-emitting device of which appearance of colors is not very good. Moreover, another object of the present invention is to provide a method for driving the light-emitting device, an illumination method by the device, and a method for manufacturing the light-emitting device.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: June 12, 2018
    Assignee: CITIZEN ELECTRONICS CO. LTD.
    Inventor: Hideyoshi Horie
  • Patent number: 9909061
    Abstract: The present invention discloses a nitroxide fluorescent powder comprising an inorganic compound containing M, A, B, O, N, and R elements; in which the M element is at least one of Ca, Sr, Ba, Mg, Li, Na, and K, the A element is at least one of B, Al, Ga, and In, the B element is at least one of C, Si, Ge, and Sn, the R element is at least one of Ce, Eu, Lu, Dy, Gd, and Ho, characterized in that the inorganic compound forms a crystal in a crystalline phase, and the oxygen atom content in the crystal in a crystalline phase is in an increasing structural distribution from a core to surface of the crystal. The nitroxide fluorescent powder and the nitroxide illuminant of the present invention have the advantages of good chemical stability, good aging and light decay resistance, and high luminescent efficiency, and are useful for various luminescent devices. The preparation method of the present invention is easy and reliable and useful for industrial mass production.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: March 6, 2018
    Assignee: Jiangsu Bree Optronics Co., Ltd
    Inventors: Jinhua He, Yibing Fu, Chao Liang, Xiaoming Teng
  • Patent number: 9840666
    Abstract: The phosphor has a broad excitation band provided by Ce3+ in an excitation spectrum. The excitation band has a peak in a range between 400 nm and 470 nm inclusive. The phosphor has, as an emission spectrum, a broad emission component provided by Ce3+ which has an emission peak wavelength of 510 nm or more to less than 570 nm and a linear emission component provided by Tb3+ which has an emission peak wavelength of 535 nm or more to less than 560 nm. The intensity of the emission spectrum shows the maximum at the wavelength of the linear emission component provided by Tb3+.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: December 12, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Natsuki Sato, Shozo Oshio
  • Patent number: 9801254
    Abstract: The present disclosure relates generally to a backlit luminous structure. The backlit luminous structure includes a substrate, such as a two dimensional or three dimensional object or surface, an ultraviolet emitting electroluminescent coating or other type of UV emitting coating that emits ultraviolet wavelengths when activated, and an ultraviolet activated luminous coating applied on the ultraviolet emitting electroluminescent coating. When activated, the ultraviolet emitting electroluminescent coating generates ultraviolet wavelengths that aviate the luminous coating. The backlit luminous structure may be used in a variety of applications, such as, but not limited to, theme parks, amusement attractions, or the like.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: October 24, 2017
    Assignee: DISNEY ENTERPRISES, INC.
    Inventors: Alexander W. Hsing, Lanny Smoot
  • Patent number: 9773955
    Abstract: A light conversion plate including a first glass substrate; a light conversion layer disposed on the first glass substrate and including quantum dots that convert incident light into light having a specific wavelength range; and a second glass substrate disposed on the light conversion layer. Further, a surface of at least one of the first glass substrate and the second glass substrate includes a plurality of protrusion patterns.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: September 26, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Seongman Jeon, Jinmok Oh, Hyunkwon Shin, Jinwoo Sung
  • Patent number: 9418829
    Abstract: A mercury-free low-pressure lamp having a bulb is provided. The bulb includes a non-mercury emissive material. When the bulb is in a non-operational state, the emissive material condenses into a liquid or solid, and when the bulb is in an operational state the emissive material forms an emitter, the emitter in combination with one or more gases generate photons when excited by an electrical discharge.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: August 16, 2016
    Assignee: Elwha LLC
    Inventors: Roderick A. Hyde, Jordin T. Kare, Tony S. Pan, Thomas A. Weaver, Lowell L. Wood, Jr.
  • Patent number: 9416313
    Abstract: The present invention provides an oxynitride silicate fluorescent substance capable of output a light having a high luminance even when irradiated by an exciting light having a high energy density. The present invention is a yellow fluorescent substance represented by a chemical formula (Ba1-x-y-z,Srx)aSibOcNd:Eu2+y,Y3+z (0.9?a?1.1, 1.9?b?2.1, 1.9?c?2.1, 1.9?d?2.1, 0?x?1, 0<y<0.01, and 0?z<0.01).
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: August 16, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Mitsuru Nitta, Seigo Shiraishi, Osamu Inoue, Kojiro Okuyama, Yoshihisa Nagasaki, Takashi Ohbayashi
  • Patent number: 9243179
    Abstract: A reaction material for a chemical heat pump includes type III anhydrous gypsum, a magnesium compound, and CaxMg1-xSO4. The reaction material for the chemical heat pump structurally changes between a compound including type III anhydrous gypsum, the magnesium compound, and CaxMg1-xSO4, and a compound including hemihydrate gypsum, a hydrate of the magnesium compound, and a hydrate of CaxMg1-xSO4 when subjected to heat storage process and heat release process. x is 0<x<1.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: January 26, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yohei Shiren, Masahiro Masuzawa, Hiroko Ohkura, Yasutomo Aman, Yoshifumi Ohba
  • Patent number: 9206353
    Abstract: Metal nano particles doped with silicate luminescent materials and preparation methods thereof are provided. The luminescent materials are represented by the general formula: (Sr1-x-yAxEuy)3SiO5:Dz@Mn, wherein A is one or two selected from alkaline-earth metal elements, D is F or Cl, @ is for coating, M is one or two selected from Ag, Au, Pt, Pd or Cu metal nano particles, 0?x?0.5, 0.001<y?0.15, and 0?z?0.5. n is a molar ratio of metal nano particles to the silicon element, wherein 0<n?0.01. Compared to the luminescent materials in the art, the said luminescent materials have higher internal quantum efficiency, luminous intensity and stability, therefore they are appropriate to be used in coating technique and improve the visual effect.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: December 8, 2015
    Assignee: Ocean's King Lighting Science & Technology Do., Ltd.
    Inventors: Mingjie Zhou, Rong Wang, Chaopu Shi, Wenbo Ma
  • Patent number: 9109762
    Abstract: The present invention provides a white light source comprising a blue light emitting LED having a light emission peak of 421 to 490 nm and satisfying a relational equation of ?0.2?[(P(?)×V(?))/(P(?max1)×V(?max1))?(B(?)×V(?))/(B(?max2)×V(?max2))]?+0.2, assuming that: a light emission spectrum of the white light source is P(?); a light emission spectrum of black-body radiation having a same color temperature as that of the white light source is B(?); a spectrum of a spectral luminous efficiency is V(?); a wavelength at which P(?)×V(?) becomes largest is ?max1; and a wavelength at which B(?)×V(?) becomes largest is ?max2. According to the above white light source, there can be provided a white light source capable of reproducing the same light emission spectrum as that of natural light.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: August 18, 2015
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Masahiko Yamakawa, Yasuhiro Shirakawa
  • Patent number: 9097392
    Abstract: A mixed light source comprising: a first radiation source, which emits radiation in the red spectral range; an excitation source, which contains a III-V semiconductor material; and a conversion substance, which, during the operation of the mixed light source, converts the radiation of the excitation source at least partly into radiation whose color locus in the CIE chromaticity diagram lies within a polygon spanned by the coordinates (0.1609; 0.497), (0.35; 0.6458), (0.558; 0.444) and (0.453; 0.415).
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: August 4, 2015
    Assignee: OSRAM GmbH
    Inventors: Ralph Peter Bertram, Ralph Wirth, Jan Marfeld
  • Patent number: 9090817
    Abstract: Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: July 28, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Eun Joo Jang, Mi Yang Kim, Hyung Kun Kim, Shin Ae Jun, Yong Wan Jin, Seong Jae Choi
  • Patent number: 9076925
    Abstract: A thermoelectric material includes a semiconductor substrate, a semiconductor oxide film formed on the substrate, and a thermoelectric layer provided on the oxide film. The semiconductor oxide film has a first nano-opening formed therein. The thermoelectric layer has such a configuration that semiconductor nanodots are piled up on or above the first nano-opening so as to form a particle packed structure. At least some of the nanodots each have a second nano-opening formed in its surface, and are connected to each other through the second nano-opening with their crystal orientation aligned. The thermoelectric material is produced through steps of oxidizing the substrate to form the semiconductor oxide film thereon, forming the first nano-opening in the oxide film, and epitaxially growing to pile up the plurality of nanodots on the first nano-opening. As a result, it is possible to provide the thermoelectric material superior in thermoelectric conversion performance.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: July 7, 2015
    Assignee: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Yoshiaki Nakamura, Masayuki Isogawa, Tomohiro Ueda, Jun Kikkawa, Akira Sakai, Hideo Hosono
  • Patent number: 9018830
    Abstract: A fluorescent lamp is provided including a phosphor blend comprising less than about 10% by weight rare earth phosphor, based on the total weight of the phosphor composition. This phosphor blend, when coated on a lamp, provides a lamp that exhibits high color rendering index (CRI), of at least 87, while simultaneously achieving low CCT, of less than about 4500K, i.e. of between about 3000K and 4500K. The phosphor system provided includes a non-rare earth strontium red broad band phosphor, a non-rare earth blue broad band halophosphor, and a rare earth-doped green-blue emitting phosphor, more specifically, a combination of SAR and blue-halo non-rare earth phosphors, and less than 20 wt % BAMn phosphor, based on the total weight of the phosphor system.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: April 28, 2015
    Assignee: General Electric Company
    Inventors: Fangming Du, William Winder Beers, Jon Bennett Jansma, William Erwin Cohen
  • Patent number: 8994261
    Abstract: A lamp having improved color quality scale is provided. The lamp has a light-transmissive envelope and a phosphor layer comprising a first phosphor and a second phosphor wherein the first phosphor has an emission band with a maximum between 590 nm and 670 nm and the second phosphor has an emission band with a maximum between 520 nm and 570 nm. The light generated by the phosphor layer, when the lamp is energized, has delta chroma values for fifteen color samples of the color quality scale within select parameters. The delta chroma values are measured in the CIE LAB color space.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: March 31, 2015
    Assignee: General Electric Company
    Inventors: William W. Beers, Laszlo Balazs, Istvan Bakk
  • Publication number: 20150054399
    Abstract: Coating systems suitable for use in fluorescent lamps, particularly as scattering agents within a UV-reflecting coating for the purpose of improving fluorescent lamp luminosity. Such a coating system is provided on a transparent or translucent substrate and includes a phosphor coating and a scattering agent that scatters UV rays. The scattering agent includes an inorganic powder present in a separate UV-reflecting layer adjacent the phosphor coating and/or dispersed in the phosphor coating so that the scattered UV rays are absorbed by the phosphor coating and cause the phosphor coating to emit visible light. The inorganic powder exhibits low or no absorption to UV rays having wavelengths of 185 nm and 254 nm and is not reactive with mercury.
    Type: Application
    Filed: December 23, 2013
    Publication date: February 26, 2015
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Fangming DU, Alok Mani SRIVASTAVA, William Winder BEERS, William Erwin COHEN
  • Patent number: 8946993
    Abstract: Excimers are formed in a high pressure gas by applying a potential between a first electrode (14, 214) and a counter electrode (25, 226) so as to impose an electric field within the gas, or by introducing high energy electrons into the gas using an electron beam. A phosphor for converting the wavelength of radiation emitted from the formed excimers is disposed within the gas and outside a region (62, 162) where the excimers are expected to be formed, so as to avoid degradation of the phosphor.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: February 3, 2015
    Assignee: Rutgers, The State University
    Inventors: Daniel E. Murnick, Nazieh Mohammad Masoud, Richard Riman
  • Patent number: 8946982
    Abstract: The invention relates to coated phosphor particles comprising luminescent particles and at least one, preferably substantially transparent, metal, transition-metal or semimetal oxide coating, and to a process for the production thereof.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: February 3, 2015
    Assignee: Merck Patent GmbH
    Inventors: Holger Winkler, Reinhold Rueger
  • Patent number: 8926110
    Abstract: A lighting unit emits light with an intensity in the wavelength from 430 to 510 nm that is maximum at 460 nm and minimum in the range from 490 to 500 nm, an intensity in the wavelength from 510 to 600 nm that is maximum in the range from 530 to 545 nm and minimum in the range from 570 to 580 nm, and an intensity in the wavelength of 600 nm or greater that is maximum in the range from 620 to 640. The lighting unit illuminates meat with light having a feeling of contrast index (FCI) of 135 to 145 and the illuminated meat has a metric hue angle from 54 to 56 and a color shift Duv from 0 to 5.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: January 6, 2015
    Assignee: Panasonic Coporation
    Inventors: Ayako Tsukitani, Sayaka Yamaguchi, Takashi Saito
  • Patent number: 8912719
    Abstract: A mercury-free low-pressure lamp having a bulb is provided. The bulb includes an emissive material and one or more phosphors. The emissive material includes at least one of an alkali metal or an alkaline earth metal, wherein when the bulb is in a non-operational state, the emissive material condenses into a liquid or solid, and when the bulb is in an operational state the emissive material forms an emitter, the emitter in combination with one or more gases generate photons when excited by an electrical discharge. The one or more phosphors are configured to convert at least a portion of the photons to other visible wavelengths.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: December 16, 2014
    Assignee: Elwha LLC
    Inventors: Roderick A. Hyde, Jordin T. Kare, Tony S. Pan, Thomas Allan Weaver, Lowell L. Wood, Jr.
  • Publication number: 20140333203
    Abstract: The invention provides a lighting unit (100) comprising (1) a vacuum ultraviolet (VUV) radiation based source of radiation (10) configured to generate VUV radiation (11), and (2) a luminescent material (20) configured to convert at least part of the VUV radiation into visible luminescent material light (21), wherein the luminescent material comprises a trivalent praseodymium containing material selected from the group consisting of (Zr1-x-yHfxPry)(Si1-yPy)04, (Zr1-x-yHfxPry)3((P1-3/4yS3/4y)04)4, and (Zr1-x-yHxPry)3((B1-3/4yX3/4y))O3)4, with x in the range of 0.0-1.0 and y being larger than 0 and being equal to or smaller than 0.15.
    Type: Application
    Filed: December 4, 2012
    Publication date: November 13, 2014
    Inventors: Georg Greuel, Thomas Juestel, Helga Bettentrup, Benjamin Herden, David Enseling
  • Patent number: 8883039
    Abstract: A fluorophor which comprises as a main component, an ? type sialon crystal containing at least Li, A element (wherein A represents one or more elements selected from among Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm and Yb), M element (wherein M represents one or more metal elements except Li and the A element), Si, Al, oxygen and nitrogen. The fluorophor has an a type sialon crystal structure which is represented by the general formulae: (Lix1, Ax2, Mx3)(Si12?(m+n)Alm+n)(OnN16?n) 1.2?x1?2.4 (1) 0.001?x2?0.4 (2) and 0?x3?1.0 (3), and has a luminescence peak at a wavelength in the range of 400 to 700 nm. The above phosphor is reduced in the lowering of brightness, and can be suitably used for a white LED and the like.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: November 11, 2014
    Assignee: National Institute for Materials Science
    Inventors: Naoto Hirosaki, Rong-Jun Xie, Mamoru Mitomo
  • Patent number: 8871114
    Abstract: Disclosed herein are emissive ceramic elements having low amounts of certain trace elements. Applicants have surprisingly found that a lower internal quantum efficiency (IQE) may be attributed to specific trace elements that, even at very low amounts (e.g., 50 ppm or less), can cause significant deleterious effects on IQE. In some embodiments, the emissive ceramic element includes a garnet host material and an amount of Ce dopant. The emissive ceramic element may, in some embodiments, have an amount of Na in the composition less than about 67 ppm, an amount of Mg in the composition less than about 23 ppm, or an amount of Fe in the composition less than about 21 ppm.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: October 28, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Hiroaki Miyagawa, Bin Zhang, James Chienchung Shih
  • Patent number: 8836206
    Abstract: A plasma display panel having a short decay time, high luminance, and high efficiency is provided. The plasma display panel includes a green phosphor layer that emits visible light when excited with vacuum ultraviolet rays. The green phosphor layer contains a green phosphor represented by the general formula aBaO.(2-a)EuO.bMgO.cSiO2.fCaCl2 (where 1.800?a?1.980, 0.950?b?1.050, 1.900?c?2.100, and 0.001?f?0.020).
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: September 16, 2014
    Assignee: Panasonic Corporation
    Inventor: Kojiro Okuyama
  • Patent number: 8808577
    Abstract: A thermally stable phosphor made of the M-Si—O—N system, having a cation M and an activator D, M being represented by Ba or Sr alone or as a mixture and optionally also being combined with at least one other element from the group Ca, Mg, Zn, Cu. The phosphor is activated with Eu or Ce or Tb alone or as a mixture, optionally in codoping with Mn or Yb. The activator D partially replaces the cation M. The phosphor is produced from the charge stoichiometry MO—SiO2—SiN4/3 with an increased oxygen content relative to the known phosphor MSi2O2N2:D, where MO is an oxidic compound.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: August 19, 2014
    Assignee: OSRAM Gesellschaft mit beschrankter Haftung
    Inventors: Daniel Becker, Wolfram Hempel, Frank Jermann, Bianca Pohl
  • Patent number: 8801970
    Abstract: A nitride phosphor contains europium as an activating element and strontium, or strontium and calcium, as divalent metal elements. The phosphor further includes aluminum and silicon. Of the europium in the phosphor, at least 85% is in the form of Eu2+. The phosphor has a peak emission wavelength of from 590 nm to 650 nm. A phosphorescent body that includes the phosphor can be suitable for converting a wavelength of at least a portion of light emitted from an excitation light source in a light-emitting device.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 12, 2014
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hiromu Watanabe, Masumi Itou, Keiichi Seki, Hiroshi Wada, Motoyuki Shigeiwa, Kaoru Terada, Naoto Kijima
  • Publication number: 20140191652
    Abstract: A phosphor for low-pressure discharge lamps is disclosed, wherein the phosphor is present in the form of phosphor grains coated with a protective layer, wherein the protective layer consists of a metal oxide, a metal borate, a metal phosphate or mixtures thereof.
    Type: Application
    Filed: June 25, 2012
    Publication date: July 10, 2014
    Applicant: OSRAM GMBH
    Inventors: Renate Hirrle, Armin Konrad, Robert Otto, Joerg Strauss
  • Patent number: 8771547
    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: Grant
    Filed: July 25, 2013
    Date of Patent: July 8, 2014
    Assignee: Lightscape Materials, Inc.
    Inventors: Yuanqiang Li, Michael Dennis Romanelli, Yongchi Tian
  • Patent number: 8754576
    Abstract: One embodiment relates to a mercury-free low-pressure lamp having a bulb. The bulb includes an emissive material and one or more phosphors. The emissive material includes at least one of an alkali metal or an alkaline earth metal, wherein when the bulb is in a non-operational state, the emissive material condenses into a liquid or solid, and when the bulb is in an operational state the emissive material forms an emitter, the emitter in combination with one or more gases generate photons when excited by an electrical discharge. The one or more phosphors are configured to convert at least a portion of the photons to other visible wavelengths.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: June 17, 2014
    Assignee: Elwha LLC
    Inventors: Roderick A. Hyde, Jordin T. Kare, Tony S. Pan, Thomas Allan Weaver, Lowell L. Wood, Jr.
  • Patent number: 8754852
    Abstract: Disclosed are a light guide plate for a non-contact type coordinate input system, a system including the same, and a non-contact type coordinate input method using the same. More particularly, the present invention relates to a light guide plate for a non-contact type coordinate input system, which eliminates inconvenience of a conventional contact-type coordinate input system inputting coordinates through direct contact, and which can reduce use of sensors and optical loss as much as possible. The present invention also relates to a system including the same, and a non-contact type coordinate input method using the same.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: June 17, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Yeon-Keun Lee, Sang-Hyun Park, Hyun-Seok Choi, Jung-Doo Kim, Su-Rim Lee
  • Patent number: 8747697
    Abstract: Provided herein are phosphor compositions that include a YAG phosphor that is substituted with gallium, such as YaCebAlcGadOz, wherein a, b, c, d and z are positive numbers. Also provided are solid state light emitting devices that include a YAG phosphor that is substituted with gallium.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: June 10, 2014
    Assignee: Cree, Inc.
    Inventors: David Clatterbuck, Brian Thomas Collins
  • Patent number: 8729786
    Abstract: The invention relates to an illuminant mixture for a discharge lamp (1) with a first and at least one second illuminant composition, said first illuminant composition having an emission spectrum in the green to yellow spectral range and having a first illuminant compound, devoid of Tb and designed to absorb the UV radiation emitted by an Hg source. The invention also relates to a discharge lamp (1) with a discharge vessel (2) and an illuminant layer (12) applied thereto, said layer containing the illuminant mixture according to the invention.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: May 20, 2014
    Assignee: OSRAM Gesellschaft mit beschraenkter Haftung
    Inventors: Frank Jermann, Armin Konrad, Martin Zachau
  • Publication number: 20140131619
    Abstract: The invention provides a a luminescent material comprising particles of UV-luminescent material having a coating, wherein the coating (a “multi-layer coating”) comprises a first coating layer and a second coating layer, wherein the first coating layer is between the luminescent material and the second coating layer, and wherein in a specific embodiment the second coating layer comprises an alkaline earth oxide, especially MgO. Further, the invention provides a lighting unit comprising such luminescent material.
    Type: Application
    Filed: June 25, 2012
    Publication date: May 15, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Georg Greuel, Thomas Juestel, Jagoda Magdalena Kuc
  • Patent number: 8721925
    Abstract: The invention relates to compounds of the formula (I) (Ca,Sr,Ba)6-X(Si1-yMey)3(O1-zMa2z)6N4:Eux (I), where Me=Th, Ru and/or Os Ma=F and/or Cl, x<0.5, y<1 and z<0.1, and to a process for the preparation of these compounds and use as phosphors and conversion phosphors for the conversion of the blue or near-UV emission from an LED.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: May 13, 2014
    Assignee: MERCK PATENT GmbH
    Inventors: Holger Winkler, Ralf Petry, Tim Vosgroene, Thomas Juestel, Dominik Uhlich, Arturas Katelnikovas
  • Publication number: 20140111082
    Abstract: A fluorescent lamp includes a phosphor composition comprising: Y2O3:Eu3+ (YEO); at least one of LaPO4:Ce3+, Tb3+ (LAP), MgAl11O19:Ce3+, Tb3+ (CAT) or GdMgB5O10:Ce3+, Tb3+ (CBT); a special BAMn phosphor, (Ba,Sr,Ca)(Mg1-xMnx)Al10O17:Eu2+, with a specific amount of Mn (x) as disclosed herein, and optionally halophosphor, with the proviso that there is no BaMgAl10O17:Eu2+ (BAM).
    Type: Application
    Filed: October 19, 2012
    Publication date: April 24, 2014
    Applicant: General Electric Company
    Inventors: William Erwin Cohen, Fangming Du, William Beers, Jon Bennett Jansma
  • Patent number: 8703019
    Abstract: A phosphor which emits light having high brightness, serves as an excellent orange or red phosphor whose light brightness is less decreased when exposed to an excitation source contains a crystal phase having the chemical composition expressed by the general formula [1]: (1?a?b)(Ln?pMII?1?pMIII?MIV?N3).a(MIV?(3n+2)/4NnO).b(AMIV?2N3)??[1] wherein Ln? represents a metal element selected from the group consisting of lanthanoids, Mn, and Ti; MnII? represents a divalent metal element except the Ln? element; MIII? represents a trivalent metal element; MIV? represents a tetravalent metal element; A represents a metal element selected from the group consisting of Li, Na, and K; 0<p?0.2; 0?a, 0?b, a+b>0, 0?n, and 0.002?(3n+2)a/4?0.9.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: April 22, 2014
    Assignees: Mitsubishi Chemical Corporation, Independent Administrative Institution National Institute for Materials Science
    Inventors: Naoto Hirosaki, Takatoshi Seto, Naoto Kijima
  • Patent number: 8704438
    Abstract: Disclosed herein are lamps comprising a radiation source and a phosphor blend configured for conversion of radiation, the phosphor blend including at least two different rare earth phosphors, wherein the phosphor blend comprises at least one multimodal rare earth phosphor. Disclosed advantages may include greater lumen output than an identical lamp in which the phosphor blend, at the same loading, does not comprise at least one multimodal rare earth phosphor.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: April 22, 2014
    Assignee: General Electric Company
    Inventors: William Erwin Cohen, William Winder Beers, Fangming Du
  • Patent number: 8704437
    Abstract: A phosphor mixture for a discharge lamp, which includes a first phosphor compound and a second phosphor compound, wherein the first phosphor compound has an emission spectrum in the green and/or yellow spectral range and absorbs the UV radiation emitted by an Hg source and the radiation in the blue spectral range emitted by the Hg source, characterized in that the first phosphor compound of the phosphor mixture comprises (Ba,Sr,Ca)2SiO4:Eu and/or (Srl-x-yBaxCay)Si2O2N2:Eu(SrSiON), as a constituent, and the second phosphor compound of the phosphor mixture comprises Y2O3:Eu, as a constituent; and the phosphor mixture has a color temperature of less than 2500 K.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: April 22, 2014
    Assignee: Osram Gesellschaft mit beschraenkter Haftung
    Inventors: Frank Jermann, Armin Konrad, Martin Zachau
  • Publication number: 20140103795
    Abstract: A plasma display panel having a short decay time, high luminance, and high efficiency is provided. The plasma display panel includes a green phosphor layer that emits visible light when excited with vacuum ultraviolet rays. The green phosphor layer contains a green phosphor represented by the general formula aBaO·(2-a)EuO·bMgO·cSiO2·fCaCl2 (where 1.800?a?1.980, 0.950?b?1.050, 1.900?c?2.100, and 0.001<f<0.020).
    Type: Application
    Filed: December 17, 2013
    Publication date: April 17, 2014
    Applicant: Panasonic Corporation
    Inventor: Kojiro OKUYAMA
  • Patent number: 8691113
    Abstract: A compound is provided containing silicon, aluminum, strontium, europium, nitrogen, and oxygen is used that enables a red phosphor having strong luminous intensity and high luminance to be obtained, and that enables the color gamut of a white LED to be increased with the use of the red phosphor. The red phosphor contains an element A, europium, silicon, aluminum, oxygen, and nitrogen at the atom number ratio of the following formula: [A(m?x)Eux]Si9AlyOnN[12+y?2(n?m)/3]. The element A in the formula is at least one of magnesium, calcium, strontium, and barium, and m, x, y, and n in the formula satisfy the relations 3<m<5, 0<x<1, 0<y<2, and 0<n<10.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: April 8, 2014
    Assignee: Dexerials Corporation
    Inventors: Hiraku Akiho, Tsuneo Kusunoki, Takahiro Igarashi, Takamasa Izawa
  • Patent number: 8690628
    Abstract: Disclosed are a method for fabrication of a thin film phosphor, a thin film phosphor and a product using the same. The thin film phosphor is fabricated by adsorbing a raw material to a surface of a substrate simultaneously with diffusing the same or, otherwise, depositing the raw material on the substrate and heating the same, so as to diffuse the raw material from the surface of the substrate into the substrate wherein the substrate contains at least one selected from constitutional elements of the phosphor. The fabricated thin film phosphor has a constitutional composition continuously varied to gradually come close to a constitutional composition of the substrate when the constitutional elements of the phosphor are diffused from a surface to an inner side of the substrate.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: April 8, 2014
    Assignee: Lstone Co., Ltd.
    Inventors: Eun-Wook Lee, Jong-Soo Kim, Je-Hong Park
  • Patent number: 8685277
    Abstract: The present invention provides a fluorescent substance excellent both in quantum efficiency and in temperature characteristics, and also provides a light-emitting device utilizing the fluorescent substance. This fluorescent substance contains an inorganic compound comprising a metal element M, a trivalent element M1 other than the metal element M, a tetravalent element M2 other than the metal element M, and either or both of O and N. In the inorganic compound, the metal element M is partly replaced with a luminescence center element R. The crystal structure of the fluorescent substance is basically the same as Sr3Al3Si13O2N21, but the chemical bond lengths of M1-N and M2-N are within the range of ±15% based on those of Al—N and Si—N calculated from the lattice constants and atomic coordinates of Sr3Al3Si13O2N21, respectively. The fluorescent substance emits luminescence having a peak in the range of 490 to 580 nm when excited with light of 250 to 500 nm.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: April 1, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yumi Fukuda, Hironori Asai
  • Patent number: 8673180
    Abstract: Light emitting devices that include an energy source configured to generate light energy and an up-conversion phosphor configured to emit light having a wavelength shorter than that of the light energy generated from the energy source are provided. The up-conversion phosphor comprises an ordered oxyfluoride compound having a formula: A3?3a/2RaMO4??1?w?F1??2?w?Nw. Methods are also generally disclosed for up-converting light energy.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: March 18, 2014
    Assignee: University of South Carolina
    Inventor: Thomas Vogt
  • Patent number: 8663501
    Abstract: Cerium, gadolinium and terbium doped aluminum phosphates of formula I may be used in fluorescent lamps Al1-x-y-z-a-b-c-d-eTbxCeyGdzLuaScbIncLadGaePO4??I wherein x is greater than or equal to about 0.001 and less than or equal to about 0.3; y is greater than or equal to about 0.001 and less than or equal to about 0.3; z is greater than or equal to about 0.01 and less than or equal to about 0.3; a is greater than or equal to about 0.01 and less than or equal to about 0.1; b is greater than or equal to about 0.01 and less than or equal to about 0.1; c is greater than or equal to about 0.01 and less than or equal to about 0.1. d is greater than or equal to about 0.01 and less than or equal to about 0.1; and e is greater than or equal to about 0.01 and less than or equal to about 0.1.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: March 4, 2014
    Assignee: General Electric Company
    Inventors: Alok Mani Srivastava, Holly Ann Comanzo, Gopi Chandran Ramachandran, Samuel Joseph Camardello, Swarnagowri Addepalli, Florencio Garcia