Light Conversion Patents (Class 313/501)
  • Patent number: 8167675
    Abstract: A dispersion-type EL element is a dispersion-type electroluminescent element with at least a transparent coating layer, a transparent conductive layer, a phosphor layer, a dielectric layer and a rear electrode layer sequentially formed on a base film surface. The transparent coating layer can be peeled off the surface of the base film. The transparent conductive layer is formed by applying a coating liquid composed mainly of conductive oxide particles and a binder on a surface of the transparent coating layer, applying compression processing to the applied layer and then curing the compressed layer.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: May 1, 2012
    Assignee: Sumitomo Metal Mining Co., Ltd
    Inventors: Masaya Yukinobu, Yuki Murayama, Yasuo Tsukui
  • Patent number: 8164250
    Abstract: A light emitting device includes a substrate layer and a light conversion layer located on said substrate layer. The light conversion layer is a polycrystalline ceramic layer, and is positioned on the substrate layer by sintering.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: April 24, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Peter Schmidt, Helmut Bechtel, Jorg Meyer
  • Patent number: 8164254
    Abstract: A light-emitting device of the present invention includes: a light-emitting element; and a phosphor layer containing phosphors that absorb light from the light-emitting element and wavelength-convert the absorbed light to emit light. The phosphor layer has a structure in which the phosphors are disposed on an applied adhesive with a thickness equal to or less than an average particle size of the phosphors. A thickness of the phosphor layer is equal to or less than five times the average particle size of the phosphors, and an occupancy ratio of the phosphors in the phosphor layer is 50% or more. Further, the phosphors disposed on the adhesive has an adjusted particle size.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: April 24, 2012
    Assignee: Dowa Electronics Materials Co., Ltd.
    Inventors: Tsukasa Maruyama, Tetsuya Ikuta
  • Publication number: 20120081000
    Abstract: The present invention discloses an LED encapsulation process and a shield structure made thereby. Firstly, a first encapsulation layer is provided, phosphor powder is uniformly disposed on a surface of the first encapsulation layer, and a second encapsulation layer is disposed on the phosphor powder to fully cover the first encapsulation layer so that the phosphor powder is sandwiched between the two encapsulation layers to ensure its arrangement position. Finally, the aforementioned members are heated and stamped to form one piece which is cut into a required shield shape.
    Type: Application
    Filed: October 5, 2010
    Publication date: April 5, 2012
    Applicant: POWER DATA COMMUNICATIONS CO., LTD.
    Inventors: CHIEN-YUAN CHEN, YI-SHENG CHEN
  • Publication number: 20120074835
    Abstract: A wavelength-converting plate for a wavelength-converted light emitting diode (LED) assembly. The wavelength-converting plate includes multiple layers of microlenses deposited thereon. The microlenses may have an index of refraction different from an index of refraction of the wavelength-converting plate.
    Type: Application
    Filed: September 27, 2010
    Publication date: March 29, 2012
    Inventors: Alan Piquette, John Kelso, Nathan Zink, John Nappi, Yi Zheng, Madis Raukas
  • Publication number: 20120074836
    Abstract: A wavelength-converting plate for a wavelength-converted light emitting diode (LED) assembly. The wavelength-converting plate includes microlenses deposited thereon. The microlenses may have an index of refraction different from the index of refraction of the wavelength-converting plate. The microlenses on the top surface of the plate increase lumen output in a direction normal to the top surface of a wavelength-converting plate.
    Type: Application
    Filed: September 27, 2010
    Publication date: March 29, 2012
    Inventors: Alan Piquette, Madis Raukas
  • Publication number: 20120074837
    Abstract: An optical lens having a fluorescent layer is provided. The optical lens is adapted for being employed in an LED packaging structure. The optical lens includes a substrate, at least one lens body, a lens shade, and a packaging member. The substrate is positioned at a bottommost side of the packaging structure, and the lens shade is positioned at a topmost side of the packaging structure. The lens body is positioned over the substrate and beneath the lens shade. A plurality of light emitting units are disposed on the substrate. The packaging member is adapted for packaging the substrate and the lens shade. The lens body is secured by the packing member so as to be positioned over the light emitting units. The lens body includes a fluorescent layer buried inside the lens body, and the lens body is positioned apart from the light emitting units for a certain distance.
    Type: Application
    Filed: September 28, 2010
    Publication date: March 29, 2012
    Inventors: Jon-Fwu Hwu, Yung-Fu Wu, Kui-Chiang Liu
  • Patent number: 8143777
    Abstract: An LED lighting unit can be configured to have a high color rendering for which color temperature can adjust itself to be close to a natural color. The LED lighting unit can be composed of three light sources that respectively include a blue LED and a different phosphor. A first light source can emit light having a color temperature located substantially on a blackbody locus, a second light source can emit light having a higher color temperature than that of the first light source and located substantially on the blackbody locus, and a third light source can emit a green or yellow light. A mixture of the light can be located substantially on the blackbody locus by controlling a beam ratio of the mixed light having contiguous wavelength components. Therefore, the LED lighting unit can emit a light having a high color rendering that can maintain a uniform color within a radiation range.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: March 27, 2012
    Assignee: Stanley Electric Co., Ltd.
    Inventor: Teiichiro Takano
  • Patent number: 8143775
    Abstract: In one embodiment of the present invention, an electron/photon source is disclosed based on field emission, cathodoluminescent and photo-enhanced field emission, including an evacuated chamber inside a housing, further including an anode and a cathode arranged inside the evacuated chamber. Furthermore, the cathode is arranged to emit electrons when a voltage is applied between the anode and cathode, the anode being arranged to emit light at a first wavelength range when receiving electrons emitted from the cathode, and a wavelength range converting material arranged to receive the emitted light of the first wavelength range and emit light at a second wavelength range. In a novel way, an embodiment of the present invention makes it possible to, in two steps, convert the electrons emitted from the cathode to visible light.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: March 27, 2012
    Assignee: Lightlab Sweden AB
    Inventor: Qiu-Hong Hu
  • Patent number: 8142051
    Abstract: An illumination system according to the principles of the invention may include a first LED and a carrier material. The carrier material may be comprised of plastic, synthetic material, polymer, latex, rubber or other material. The carrier material may also contain a phosphor, fluorescent material, organic fluorescent material, inorganic fluorescent material, impregnated phosphor, phosphor particles, phosphor material, YAG:Ce phosphor, or other material for converting electromagnetic radiation into illumination or visible light.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: March 27, 2012
    Assignee: Philips Solid-State Lighting Solutions, Inc.
    Inventor: Alfred D. Ducharme
  • Publication number: 20120068594
    Abstract: An LED includes a chip having a light emitting surface, and a coating of phosphor-containing material on the light emitting surface. Phosphor particles are arranged in a densely packed layer within the coating at the light emitting surface, and such that the light emitting surface is in contacting relationship with the phosphor particles.
    Type: Application
    Filed: September 21, 2010
    Publication date: March 22, 2012
    Inventors: James Ibbetson, Peter S. Andrews
  • Patent number: 8138667
    Abstract: It is an object of the present invention to provide a light-emitting device that is high in color purity of light and is high in light extraction efficiency, where sputtering is used to form an electrode on an electroluminescent layer without damage to a layer including an organic material.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: March 20, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Junichiro Sakata, Hisao Ikeda, Yasuo Nakamura, Keiko Saito
  • Patent number: 8125137
    Abstract: A multi-chip lighting emitting device (LED) lamp for providing white light includes a submount including first and second die mounting regions thereon. A first LED chip is mounted on the first die mounting region, and a second LED chip is mounted on the second die mounting region. The LED lamp is configured to emit light having a spectral distribution including at least four different color peaks to provide the white light. For example, a first conversion material may at least partially cover the first LED chip, and may be configured to absorb at least some of the light of the first color and re-emit light of a third color. In addition, a second conversion material may at least partially cover the first and/or second LED chips, and may be configured to absorb at least some of the light of the first and/or second colors and re-emit light of a fourth color. Related light fixtures and methods are also discussed.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: February 28, 2012
    Assignee: Cree, Inc.
    Inventors: Nicholas W. Medendorp, Jr., Mark McClear, Bernd P. Keller, George R. Brandes, Ronan P. LeToquin
  • Patent number: 8125138
    Abstract: In a lighting device with at least one continuous OLED layer (4) with a first electrode layer (5), a second electrode layer (6) and a plurality of optical collimating means, the second electrode layer (6) is only in electrical contact with the OLED layer (4) within spaced sections (6a), arranged within acceptance angles of the collimating means. Such a lighting device can be manufactured efficiently and is highly energy-efficient.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: February 28, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Gunnar Luttgens, Benno Spinger
  • Patent number: 8123376
    Abstract: A lighting device comprising first and second groups of solid state light emitters, which emit light having peak wavelength in ranges of from 430 nm to 480 nm, and first and second groups of lumiphors which emit light having dominant wavelength in the range of from 555 nm to 585 nm. In some embodiments, if current is supplied to a power line, a combination of (1) light exiting the lighting device which was emitted by the first group of emitters, and (2) light exiting the lighting device which was emitted by the first group of lumiphors would have a correlated color temperature which differs by at least 50 K from a correlated color temperature which would be emitted by a combination of (3) light exiting the lighting device which was emitted by the second group of emitters, and (4) light exiting the lighting device which was emitted by the second group of lumiphors.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: February 28, 2012
    Assignee: Cree, Inc.
    Inventors: Antony Paul Van De Ven, Gerald H. Negley
  • Patent number: 8120239
    Abstract: A display device that includes an underlying excitation source, a converting layer, and an optical filter layer. The underlying excitation source emits light in a spatial pattern that may or may not be altered in time and has a short wavelength capable of being at least partially absorbed by the overlying converting layer. The converting layer can be a contiguous film or pixels of quantum dots that can be dispersed in a matrix material. This converting layer is capable of absorbing at least a portion of the wavelength(s) of the light from the underlying excitation source and emitting light at one or more different wavelengths. The optical filter layer prevents the residual light from the excitation source that was not absorbed by the converting layer from being emitted by the display device.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: February 21, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang-Ohk Cheon, Michael Locascio, San Ming Yang
  • Patent number: 8120240
    Abstract: A light emission device includes multiple electrically activated solid state emitters (e.g., LEDs) having differing spectral output from one another; and/or phosphor material including one or more phosphors arranged to receive spectral output from at least one of the solid state emitters and to responsively emit a phosphor output, to provide spectral output. In one arrangement, at least four electrically activated solid state emitters each have different spectral outputs in the visible range, with the emitters arranged in an array positioned on a single reflector cup or other support, with at least two solid state emitters differing substantially in size. Aggregated output may include white light having a color temperature in any of several desired ranges.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: February 21, 2012
    Assignee: Cree, Inc.
    Inventor: George R. Brandes
  • Patent number: 8115377
    Abstract: A translucent material substrate is shaped such that high luminous efficiency can be obtained in an organic EL light source in which light is emitted from a translucent material substrate to the atmosphere. The organic EL light source includes a luminescent layer composed of an organic luminescent element, a transparent electrode and a counter electrode, and a translucent material substrate. The translucent material substrate has a truncated quadrangular pyramidal shape having a surface in abutment with the luminescent layer as the bottom face of the shape. The bottom face is formed in the shape of a square in which the length of one side is “b”, and the top face opposite the bottom face is formed in the shape of a square in which the length of one side with respect to the same extending direction as that of the “b”-length side is “a”. In addition, the shape of the translucent material substrate has thickness “c”.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: February 14, 2012
    Assignee: NEC Lighting, Ltd.
    Inventor: Shusaku Kon
  • Publication number: 20120032573
    Abstract: An LED comprises a substrate, an LED chip mounted on the substrate, an encapsulation encapsulating the LED chip, and a phosphor layer containing phosphor particles disposed on an outer surface of the encapsulation. A luminous intensity I of light generated by the LED chip and a radiation angle ? are in Lambertian distribution and satisfy following formula: I=I0×cos ?, here the radiation angle ? is not lower than 0°, and is not higher than 90°, and I0 is a luminous intensity at a central axis of the LED chip, and the radiation angle ? is an angle between the light and the central axis. One of parameters of concentration, particle number of the phosphor particles in the phosphor layer and a thickness of the phosphor layer is also in Lambertian distribution relative to the radiation angle ?.
    Type: Application
    Filed: October 6, 2010
    Publication date: February 9, 2012
    Applicant: FOXSEMICON INTEGRATED TECHNOLOGY, INC.
    Inventor: CHIH-MING LAI
  • Patent number: 8110979
    Abstract: An inorganic electroluminescence device including a first electrode and a second electrode disposed apart from each other, and a dielectric material layer disposed between the first and second electrodes. The dielectric material layer has a micro-tubular shape, and a light emitting layer is filled in the dielectric material layer.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: February 7, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Shang-hyeun Park, Ji-beom Yoo, Mun-Ja Kim, Min-jong Bae, Tae-won Jeong
  • Patent number: 8106577
    Abstract: An organic EL device includes light-reflective electrodes; light-transmissive electrodes; organic EL layers that are respectively provided between the light-reflective electrodes and the light-transmissive electrodes to emit a plurality of color light components, the organic EL layer emitting a different color light component in each pixel; and transflective layers that are selectively provide in predetermined color pixels to reflect or transmit light emitted from the organic EL layers, respectively, each transflective layer being opposite to the light-reflective electrode with the organic EL layer interposed therebetween.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: January 31, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Hidekazu Kobayashi
  • Patent number: 8106578
    Abstract: We disclose a highly transmissive electroluminescent lamp, where the lamp has a front electrode electrically connected to a first clear conductive layer of PDOT or functionally similar material, a phosphor layer and a dielectric layer. The phosphor layer contains nano-particles of phosphor, where the nano-particles have a size less than about 100 nm. The dielectric layer contains nano-particles of a dielectric, where these nano-particles having a size less than about 100 nm. There is a second clear conductive layer of PDOT, and a back electrode electrically connected to the second clear conductive layer, for energizing the lamp. In other embodiments, the particles in the phosphor layer may have sizes larger than 100 nm, while still achieving the effect of substantial transparency of the lamp.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: January 31, 2012
    Assignee: Oryon Technologies, LLC
    Inventors: Thomas L. Brown, Manuel R. Adame
  • Publication number: 20120014086
    Abstract: A method and apparatus for generating different spectral compositions of light is disclosed. The method comprises generating light at a wavelength, using an LED in some embodiments, and optically coupling the generated light to a first phosphor in a first operating mode and optically coupling the generated light to a second phosphor in a second operating mode. Several different embodiments of optically coupling the phosphors to the light source are disclosed. The first phosphor emits light with a first spectral characteristic when irradiated by the light at the wavelength and the second phosphor emits light with a second spectral characteristic when irradiated by the light at the wavelength.
    Type: Application
    Filed: July 19, 2010
    Publication date: January 19, 2012
    Applicant: Greenwave Reality, Inc.
    Inventor: Karl Jonsson
  • Patent number: 8093797
    Abstract: An electroluminescent layer for a light. The light includes a phosphor with a fluorescent pigment or dye.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: January 10, 2012
    Assignee: MFlex UK Limited
    Inventor: William Frank Tyldesley
  • Patent number: 8093805
    Abstract: In an organic electroluminescent display device comprising a wiring layer, an insulating layer, a first electrode, an organic electroluminescent layer, and a second electrode, wiring which conducts with a second electrode is arranged between light emitting pixels, and is provided either between an organic electroluminescent layer and the second electrodes, or on top of the second electrodes.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: January 10, 2012
    Assignee: Fujifilm Corporation
    Inventors: Yoshiaki Sakamoto, Toshiro Takahashi
  • Patent number: 8089207
    Abstract: Solid state light emitting devices and/or solid state lighting devices use three or more phosphors excited by energy from a solid state source. The phosphors are selected and included in proportions such that the visible light output of such a device exhibits a radiation spectrum that approximates a black body radiation spectrum for the rated color temperature for the device, over at least a predetermined portion of the visible light spectrum.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: January 3, 2012
    Assignee: ABL IP Holding LLC
    Inventors: David P. Ramer, Jack C. Rains, Jr.
  • Patent number: 8084934
    Abstract: A white LED with an improved structure for high light emitting efficiency is provided. The white LED includes a light source device and a phosphor containing light emitting nanoparticles and an inorganic phosphor which emit white light by being excited by the light source.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: December 27, 2011
    Assignee: Samsung-Electro Mechanics Co., Ltd.
    Inventors: Byung-ki Kim, Kyung-sang Cho, Eun-joo Jang
  • Patent number: 8076847
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: December 13, 2011
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Takahiro Naitou, Yoshinori Murazaki
  • Patent number: 8076846
    Abstract: An optical material is provided. The optical material includes a nanoparticle-resin composite material in which metal oxide nanoparticles are dispersed in a polymer, wherein the metal oxide nanoparticles are crystalline and have a particle diameter of 1×10?8 m or less, wherein surfaces of the metal oxide nanoparticles are coated with a surfactant, and wherein the metal oxide nanoparticles are crystallized at a temperature greater than or equal to 200° C. and less than or equal to 400° C. A light assembly including the nanoparticle-resin composite material is also provided.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: December 13, 2011
    Assignee: Sony Corporation
    Inventors: Mikihisa Mizuno, Yuichi Sasaki, Sung-Kil Lee, Hitoshi Katakura
  • Patent number: 8076835
    Abstract: A multi-chip lighting emitting device (LED) lamp for providing white light includes a submount including first and second die mounting regions thereon. A first LED chip is mounted on the first die mounting region, and a second LED chip is mounted on the second die mounting region. The LED lamp is configured to emit light having a spectral distribution including at least four different color peaks to provide the white light. For example, a first conversion material may at least partially cover the first LED chip, and may be configured to absorb at least some of the light of the first color and re-emit light of a third color. In addition, a second conversion material may at least partially cover the first and/or second LED chips, and may be configured to absorb at least some of the light of the first and/or second colors and re-emit light of a fourth color. Related light fixtures and methods are also discussed.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: December 13, 2011
    Assignee: Cree, Inc.
    Inventors: Nicholas W. Medendorp, Jr., Mark McClear, Bernd P. Keller, George R. Brandes, Ronan P. LeToquin
  • Patent number: 8076838
    Abstract: A light emitting device includes a plurality of types of light emitting elements including at least a red light emitting element that outputs red light, a green light emitting element that outputs green light, and a blue light emitting element that outputs blue light.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: December 13, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Hidekazu Kobayashi
  • Publication number: 20110291548
    Abstract: A lamp cover containing phosphor for providing white light emission is disclosed. The lamp cover is comprised of a light-partial-reflective cap structure providing the outer surface of the lamp cover, wherein the light-partial-reflective cap structure is composed of a plurality of light transparent layers and a plurality of vacuum layers that are alternatively stacked from outside to inside, a supporting transparent cap structure providing the inner surface of the lamp cover, and a phosphor mixed structure mechanically supported by the outer surface of the supporting transparent cap structure, wherein the outer surface of the phosphor mixed structure is adjacent to the most inner vacuum layer of the light-partial-reflective cap structure. Once the lamp cover is combined with a phosphor exciting light source, the light-partial-reflective cap structure partially prevents phosphor exciting light from escaping from the lamp cover by using Fresnel reflection.
    Type: Application
    Filed: May 25, 2010
    Publication date: December 1, 2011
    Applicant: NEPES LED CORPORATION
    Inventors: Tran NGUYEN THE, Yongzhi He, Frank Shi
  • Patent number: 8067885
    Abstract: An organic EL device and display are provided. A red light emitting layer, a green light emitting layer, a blue light emitting layer are laminated in this order between an anode and a cathode, and an intermediate layer “a” formed by use of an organic material is provided between the green light emitting layer and the blue light emitting layer. The HOMO-LUMO energy gap in the intermediate layer “a” is greater than the HOMO-LUMO energy gap of a green light emitting material constituting the green light emitting layer. In addition, the intermediate layer “a” has a hole transporting property. In the case of configuring a display by use of the organic EL devices, color filters are provided on the light take-out surface side. This makes it possible to provide an organic EL device with which light emission components for three colors of red, green and blue with a good balance suited to use for a full-color display can be obtained at a high luminance.
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: November 29, 2011
    Assignee: Sony Corporation
    Inventor: Mitsuhiro Kashiwabara
  • Patent number: 8067884
    Abstract: A lighting arrangement comprising: a light reflective enclosure; at least one radiation source housed within the enclosure and operable to generate excitation light of a first wavelength range; a substantially spherical optical component mounted over the enclosure opening and at least one phosphor operable to absorb at least a portion of the excitation light and to emit light of a second wavelength range, wherein light generated by the arrangement comprises the combined light of the first and second wavelength ranges and wherein the at least one phosphor material is provided as a layer on at least a part of the surface of the optical component that is enclosed within the volume of the enclosure when the component is mounted to the enclosure.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: November 29, 2011
    Assignee: Intematrix Corporation
    Inventor: Yi-Qun Li
  • Patent number: 8063561
    Abstract: Disclosed is an organic light-emitting display device comprising: a pixel region wherein an organic light-emitting device comprised of a first electrode, an organic thin film layer and a second electrode is formed; a first substrate comprising a non-pixel region encompassing the pixel region; a second substrate disposed on the upper of the first substrate to be overlapped with the pixel region and a portion of the non-pixel region; and a plurality of frits provided between the first substrate and the second substrate and formed in parallel at spaced intervals along the peripheral portion of the pixel region, wherein the first substrate is bonded to the second substrate by the plurality of frits.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: November 22, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Dong Soo Choi, Jin Woo Park
  • Publication number: 20110279015
    Abstract: A lighting device comprising first and second groups of non-white light sources emitting light outside a first area on a 1976 CIE Chromaticity Diagram bounded by a curves 0.01 u?v? above and below the blackbody locus and within a second area enclosed by saturated light curves from 430 to 465 nm and from 560 to 580 nm and segments from 465 to 560 nm and from 580 to 430 nm and a supplemental light emitter in the range of 600 to 640 nm. Also, a lighting device, comprising a first string of non-white phosphor converted light sources with excitation sources having dominant wavelengths that differ by at least 5 nm, a second string of non-white light sources, and a third string of supplemental light emitters in the range of 600 to 640 nm.
    Type: Application
    Filed: May 10, 2011
    Publication date: November 17, 2011
    Applicant: Cree, Inc.
    Inventors: Gerald H. Negley, Antony Paul Van De Ven
  • Patent number: 8058802
    Abstract: An article includes a display layer having an outward facing surface and an inward facing surface. The display layer includes a light-emitting device that generates heat and light during use. A thermal transport layer may be secured to the display layer. The thermal transport layer may include a thermally conductive material that can transport heat generated by the light-emitting device away from the light-emitting device.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: November 15, 2011
    Assignee: General Electric Company
    Inventors: Yun Li, Mark Lewis Grabb, John Erik Hershey, Jian Zhang, Hua Xia
  • Patent number: 8058793
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: November 15, 2011
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Masatoshi Kameshima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai
  • Patent number: 8053981
    Abstract: An organic light-emitting device and methods of forming the same are provided. The organic light-emitting device includes: a substrate having a pixel area and a peripheral circuit area; a reflective layer on the substrate, the reflective layer having a first reflective part in the pixel area and a second reflective part in the peripheral circuit area; a first electrode layer having a first part on the first reflective part; a pixel definition layer on the substrate, the pixel definition layer forming a plurality of pixel openings to expose a portion of the first part of the first electrode layer and at least one electrode contact hole to expose the second reflective part; an organic light-emitting layer on the first electrode layer; and a second electrode layer on the organic light-emitting layer, the second electrode layer extending to the peripheral circuit area to electrically couple with the exposed area of the second reflective part.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: November 8, 2011
    Assignee: Chimei Innolux Corporation
    Inventors: Chuan-Yi Chan, Du-Zen Peng
  • Patent number: 8053970
    Abstract: An LED with a semiconductor light emitting element that emits a blue or a blue-violet light, and a fluorescent material that absorbs some or all of the light emitted from the element and emits a fluorescent light of a wavelength different from the absorbed light. The fluorescent material is a mixed fluorescent material obtained by mixing a first fluorescent material that emits a blue-green or a green light, a second fluorescent material that has a peak emission wavelength longer than that of the first fluorescent material and emits a green or a yellow-green light, a third fluorescent material that has a 1 peak emission wavelength longer than that of the second fluorescent material and emits a yellow-green, a yellow or a yellow-red light, and a fourth fluorescent material that has a peak emission wavelength longer than that of the third fluorescent material and emits a yellow-red or a red light.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: November 8, 2011
    Assignees: Fujikura Ltd., National Institute for Materials Science
    Inventors: Naoki Kimura, Ryuji Suzuki, Ken Sakuma, Naoto Hirosaki
  • Patent number: 8053985
    Abstract: An organic electroluminescent device and its method of manufacturing are provided. The organic electroluminescent device may include a rear substrate, an organic electroluminescent unit including a first electrode, an organic film, and a second electrode stacked on a surface of the rear substrate. It may also include a front substrate joined to the rear substrate to seal an internal space in which the organic electroluminescent unit is disposed. It may also include a porous oxide layer composed of a porous silica and a metal compound on a lower surface thereof. A device constructed according to the present invention may have excellent adsorption of moisture and oxygen, thereby increasing the life span of the device.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: November 8, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Jong-Hyuk Lee, Hae-Seung Lee, Yoon-Hyeung Cho, Won-Jong Kim, Jin-Woo Park
  • Patent number: 8049418
    Abstract: The luminance of different colors of light emitted from EL elements in a pixel portion of a light emitting device is equalized and the luminance of light emitted from the EL elements is raised. The pixel portion of the light emitting device has EL elements whose EL layers contain triplet compounds and EL elements whose EL layers contain singlet compounds in combination. The luminance of light emitted from the plural EL elements is thus equalized. Furthermore, a hole transporting layer has a laminate structure to thereby cause the EL elements to emit light of higher luminance.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: November 1, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Takeshi Nishi, Mayumi Mizukami, Hisao Ikeda
  • Patent number: 8049408
    Abstract: An organic light emissive device comprising: a first electrode; a second electrode; and an organic light emissive region between the first and second electrodes comprising an organic light emissive material which has a peak emission wavelength, wherein at least one of the electrodes is transparent and comprises a composite of a charge injecting metal and another material which is codepositable with the charge injecting metal, the other material having a different refractive index to that of the charge injecting metal and wherein the other material has a lower degree of quenching at the peak emission wavelength than the charge injecting metal whereby quenching of excitons by the at least one electrode is reduced, the charge injecting metal comprising either a low work function metal having a work function of no more than 3.5 eV or a high work function metal having a work function of no less than 4.5 eV.
    Type: Grant
    Filed: August 10, 2005
    Date of Patent: November 1, 2011
    Assignee: Cambridge Display Technology Limited
    Inventors: Euan C. Smith, Matthew Roberts, William Young, Clare Louise Foden
  • Patent number: 8049405
    Abstract: A self light emitting display device having high level of the external coupling efficiency and high grade image presentation as no optical cross-talk or blur can be obtained by a new light-emitting element. The device is constructed as follows. A plurality of picture elements, each of which picture elements has an organic layer composing light emitting areas, a transparent electrode and a reflective electrodes, are formed on a substrate. Between the picture elements, a bank which has a tilted reflective surface is formed so that the light emitting area is surrounded by the bank wherein the transparent optical waveguide layer is formed as optically isolated for each of the picture elements.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: November 1, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masaya Adachi, Kazutaka Tsuji, Hajime Murakami, Etsuko Nishimura
  • Patent number: 8044570
    Abstract: A lighting device includes a printed wiring board, a plurality of light-emitting elements, a sealing member, and a color conversion unit, and an adhesive layer. The sealing member has light transmitting properties and seals the light-emitting elements mounted on the printed wiring board. The color conversion unit includes a cover member of light transmitting properties, and a fluorescent substance layer provided on the inner surface of the cover member. The adhesive layer has light-transmitting properties, and adheres the sealing member to the fluorescent substance layer of the color conversion unit in an airtight manner.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: October 25, 2011
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Tsuyoshi Oyaizu, Kozo Ogawa, Seiko Kawashima, Akiko Takahashi, Haruki Takei, Erika Takenaka
  • Patent number: 8044569
    Abstract: A light emitting device includes a wavelength converting member for absorbing light emitted by an exciting light source and emitting light of a different wavelength. With a wavelength at which the light from the exciting light source has a maximum energy intensity denoted as a first wavelength, a wavelength at which the light from the wavelength converting member has a maximum energy intensity denoted as a second wavelength, a wavelength lying between the first and second wavelengths at which the light from the light emitting device has a minimum energy intensity denoted as a third wavelength, and 650 nm denoted as a fourth wavelength, then the light emitting device has an emission spectrum such that the proportion of the energy intensity at the first wavelength to the energy intensity at the third wavelength is in a range from 100:15 to 100:150, and the proportion of the energy intensity at the first wavelength to the energy intensity at the fourth wavelength is in a range from 100:45 to 100:200.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: October 25, 2011
    Assignee: Nichia Corporation
    Inventors: Suguru Takashima, Masato Aihara, Junji Takeichi, Takahiro Naitou, Hiroto Tamaki, Tomohisa Kishimoto
  • Patent number: 8044577
    Abstract: A full-color organic light emitting display device and a method of fabricating the same, including a substrate, at least one color conversion layer, a color filter, and an organic light emitting diode having a lower electrode disposed on the substrate, an upper electrode disposed on the lower electrode, and an organic layer with at least a first emission layer.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: October 25, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Seok-Hwan Hwang, Young-Kook Kim
  • Patent number: 8044585
    Abstract: A light-emitting diode includes a package, a light-emitting diode chip and a lens. The light-emitting diode chip is mounted on the package. The lens is mounted on the package and envelops the light-emitting diode chip, wherein the lens has a plane region surrounding the package and a bumpy region with a plurality of bumps fully arranged thereon adjacent to the plane region.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: October 25, 2011
    Assignee: Chain Technology Consultant Inc.
    Inventor: Ming-Hsien Shen
  • Patent number: 8044572
    Abstract: A light conversion structure ensuring good light transmission and less deterioration and capable of controlling light to a desired color tone and emitting a highly bright light, and a light-emitting device using the same. The light conversion structure is a light conversion structure including a layer formed of a ceramic composite, which absorbs a part of a first light to emit a second light and transmits a part of the first light, and a fluorescent layer for the control of color tone, which is formed on the surface of the ceramic composite and which absorbs a part of the first light or a part of the second light to emit a third light and transmits a part of the first light or a part of the second light, wherein the ceramic composite includes a solidified body where at least two or more metal oxide phases are formed continuously and three-dimensionally entangled with each other, and at least one metal oxide phase in the solidified body includes a metal element oxide capable of emitting fluorescence.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: October 25, 2011
    Assignee: Ube Industries, Ltd.
    Inventors: Shin-ichi Sakata, Atsuyuki Mitani, Itsuhiro Fujii
  • Patent number: 8040039
    Abstract: A device and method for emitting composite output light uses multiple wavelength-conversion mechanisms to convert the original light generated by a light source of the device into longer wavelength light to produce the composite output light. One of the wavelength-conversion mechanisms of the device is a fluorescent substrate of the light source that converts the original light into first converted light. Another wavelength-conversion mechanism of the device is a wavelength-conversion region optically coupled to the light source that converts the original light into second converted light. The original light, the first converted light and the second converted light are emitted from the device as components of the composite output light.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: October 18, 2011
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventor: Kee Yean Ng