Light Conversion Patents (Class 313/501)
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Patent number: 7902739Abstract: An object of the present invention is to maintain sufficient light extraction from an organic light emitting device and reduce reflection of external light. There are arranged a polarizing member, a prism member, a phase member, and an organic light emitting element which has an organic light emitting layer arranged between a pair of electrodes, in mentioned order from the side of a light extraction surface. When the prism member includes two sheets, the vertex angle of the prism member sheet arranged on the side of the organic light emitting element is preferably a vertex or less of the prism member arranged on the side of the light extraction surface. Furthermore, the prism members are preferably arranged so that pitch directions thereof are orthogonal to each other.Type: GrantFiled: March 26, 2007Date of Patent: March 8, 2011Assignee: Canon Kabushiki KaishaInventors: Yoichi Osato, Hiroyuki Kitayama
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Patent number: 7898167Abstract: An electroluminescence (EL) display device with improved external light coupling efficiency and brightness that may be easily manufactured. The EL display device includes: a substrate; a first electrode arranged above the substrate; a second electrode arranged above and substantially parallel to the first electrode; an intermediate layer arranged between the first and second electrodes, and including an emissive layer; a color converting layer arranged between the substrate and the first electrode or above the second electrode; and a light resonance controlling layer arranged between the emissive layer and the color converting layer.Type: GrantFiled: December 12, 2005Date of Patent: March 1, 2011Assignee: Samsung Mobile Display Co., Ltd.Inventors: Young-Woo Song, Yoon-Chang Kim, Sang-Hwan Cho, Ji-Hoon Ahn, Joon-Gu Lee, So-Young Lee, Jong-Seok Oh, Jae-Heung Ha
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Patent number: 7897984Abstract: AN LED chip package body provides an LED chip with a pad-installed surface, a plurality of pads disposed on the pad-installed surface and a rear surface formed opposite the pad-installed surface. The LED chip package body further has a light-reflecting coating disposed on the pad-installed surface of the LED chip and a plurality of pad-exposed holes for exposure of the corresponding pads of the LED chip. The LED chip package body further comprises a light-transparent element disposed on the rear surface of the LED chip and a plurality of conductive projecting blocks. Each of the conductive projecting blocks is disposed on the corresponding pad of the LED chip.Type: GrantFiled: January 9, 2008Date of Patent: March 1, 2011Assignee: Suzhou Industrial Park Tony Lighting Technology Co., Ltd.Inventor: Yu-Nung Shen
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Publication number: 20110044022Abstract: Embodiments disclosed herein provide optical systems utilizing photon conversion materials in conjunction with a light source and an LED. An LED can be positioned in a cavity defined by a base and one or more sidewalls. Phosphors can be disposed on the entrance face of a lens between the entrance face to the lens body and the LED so that light emitted from the LED will be incident on the phosphor and down converted before entering the lens body through the entrance face. The lens can positioned so that the phosphors are separated from the LED by a gap.Type: ApplicationFiled: December 23, 2009Publication date: February 24, 2011Applicant: Illumitex, Inc.Inventors: Hyunchul Ko, Randall E. Johnson, Dung T. Duong, Paul N. Winberg
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Patent number: 7893607Abstract: On a main face of a substrate, organic EL light emitting layers are formed by stacking first electrodes for respective pixels, an organic EL layer having a white light emitting function formed above the first electrodes to cover the first electrodes in common, and a second electrode formed such that the second electrode covers the organic EL layer in common in this order, and light emitted from the organic EL layer is irradiated to the second electrode side. Above the second electrode, a color converting filter, which converts the white light emitted from the organic EL light emitting layer to a given color and is applied by coating using a wet process, is formed for every pixel, and a protective layer, which prevents the deterioration of the light emitting layer attributed to a coating material of the color filter, is provided between the second electrode and the color converting filter.Type: GrantFiled: July 12, 2005Date of Patent: February 22, 2011Assignee: Hitachi Displays., Ltd.Inventors: Masatomo Terakado, Shinichi Kato, Eiji Matsuzaki
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Publication number: 20110037949Abstract: An illuminator configured to deliver white light into an optical fiber includes a pump light source and a white phosphor. The pump light source configured to emit short-wavelength light. The white phosphor is disposed to receive the short-wavelength light from the pump light source and to output white light in response to the pumping light. The white phosphor is thermally isolated from the pump light source.Type: ApplicationFiled: August 9, 2010Publication date: February 17, 2011Inventors: Michael James Papac, Christopher Horvath, Ronald T. Smith, Michael J. Yadlowsky
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Patent number: 7888858Abstract: An light-emitting diode device, including a substrate; and a reflective electrode and a semi-transparent electrode formed over the substrate and an unpatterned white light-emitting layer formed between the reflective electrode and the semi-transparent electrode, the reflective electrode, semi-transparent electrode, and unpatterned white-light-emitting layer forming an optical microcavity, and wherein either the reflective or semi-transparent electrodes is patterned to form a plurality of independently controllable light-emitting elements with at least one light-emitting element having no color filter. Color filters are formed over a side of the semi-transparent electrodes opposite the unpatterned white light-emitting layer in correspondence with the light-emitting elements, the color filters having at least two different colors.Type: GrantFiled: August 21, 2007Date of Patent: February 15, 2011Assignee: Global OLED Technology LLCInventors: Ronald S. Cok, Joel D. Shore, Yuan-Sheng Tyan, Donald R. Preuss
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Publication number: 20110032450Abstract: Provided is an LED light source having improved luminance characteristics. The LED light source device (1) is provided with a light emitting body (12) mounted on a mounting surface (11a) of a base member (11), and a transparent resin member (13), which is formed on the mounting surface (11a) and provided with a light emitting surface (13a) and a side end surface (13b). The side end surface (13b) is tilted so that the length of the light emitting surface (13a) in the lateral direction is longer than the length of the mounting surface (11a) in the lateral direction, and an interface between the side end surface (13b) and atmosphere is permitted to be a reflecting surface.Type: ApplicationFiled: January 8, 2009Publication date: February 10, 2011Inventors: Hiroaki Shigeta, Koji Yamabuchi
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Patent number: 7884539Abstract: A phosphor having an excitation band relative to lights in the wide range of wavelengths from ultraviolet to visible light, and having an emission spectrum in the red range and so on, with a wide half value width, and an LED and a light source using the phosphor and emitting white and other color lights with good color rendering properties are provided. Powdered raw materials of Ca3N2 (2N), CaO (2N), AlN (3N), Si3N4 (3N), and Eu2O3 (3N) are prepared, and the respective raw materials are mixed to have a mole ratio of the respective elements of Ca:Al:Si:Eu=0.985:1:1:0.015. The mixed raw materials are fired at 1000° C. or higher in an inert atmosphere for three hours, and thereafter pulverized to obtain a phosphor having a composition of CaAlSiN2.83O0.25:Eu, which is one example of the phosphor satisfying the above described object.Type: GrantFiled: July 10, 2008Date of Patent: February 8, 2011Assignees: DOWA Electronics Materials Co., Ltd., Nichia CorporationInventors: Akira Nagatomi, Masahiro Gotoh, Kenji Sakane, Shuji Yamashita
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Patent number: 7884545Abstract: The present invention is directed to the provision of an LED light source that can easily adjust its chromaticity and a chromaticity adjustment method for such an LED light source. More specifically, the invention provides a chromaticity adjustment method for an LED light source having an LED device, a phosphor which absorbs a portion of light emitted from the LED device and emits light by wavelength conversion, and a resin material containing the phosphor and disposed so as to enclose the LED device, wherein an ink coating layer is disposed on a surface of the resin material in order to adjust chromaticity; the invention also provides an LED light source adjusted in such a manner.Type: GrantFiled: March 24, 2009Date of Patent: February 8, 2011Assignee: Citizen Holdings Co., Ltd.Inventors: Masafumi Yokoyama, Keisuke Sakai
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Patent number: 7884538Abstract: A light-emitting device is provided, which includes a package having a first portion and a second portion surrounding it, a semiconductor light-emitting element mounted on the first portion and emitting a light having an emission peak in a near-ultraviolet region, a transparent resin layer covering the semiconductor light-emitting element and contacted with the package, and a laminated body formed on the transparent resin layer with end faces of the laminated body being contacted with the second portion. The transparent resin layer has an arch-like outer profile perpendicular cross section. The laminated body has an arch-like outer profile in perpendicular cross section and comprises a red fluorescent layer, a yellow fluorescent layer, a green fluorescent layer and a blue fluorescent layer laminated in the mentioned order. The yellow fluorescent layer has a top portion which is made larger in thickness than that of the end face portions thereof.Type: GrantFiled: June 20, 2008Date of Patent: February 8, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Iwao Mitsuishi, Shinya Nunoue, Yasushi Hattori
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Patent number: 7884544Abstract: A semiconductor light emitting device includes a semiconductor light emitting element that emits light of a first wavelength, at least two kinds of phosphors that absorb the light of the first wavelength and then emit wavelength-converted light, sealing resin in which the at least two kinds of phosphors are dispersed and the semiconductor light emitting element is embedded, and binder resin. Combined bodies in which the at least two kinds of phosphors are combined by the binder resin are dispersed in the sealing resin.Type: GrantFiled: September 1, 2005Date of Patent: February 8, 2011Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Hatsuo Takezawa, Kenji Shimomura, Hiroaki Oshio, Yasuhiro Shirakawa, Tsutomu Ishii
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Publication number: 20110025192Abstract: The invention provides an illumination device (10) with a light emitting diode (20), a transmissive support (50) comprising a luminescent material (51), and a translucent exit window (60). The ratio of the diffuser cavity cross section (212) and LED cavity cross section (211) is larger than (1). With the proposed illumination device (10), the lamp may in particular look white when it is in the off-state and illuminated with white light. Other advantages are that an intrinsically efficient system may be provided and that a warm white option may be provided.Type: ApplicationFiled: April 1, 2009Publication date: February 3, 2011Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Johannes Petrus Maria Ansems, Lars Rene Christian Waumans
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Publication number: 20110025191Abstract: An optical device deploring a phosphor layer having a textured surface to improve output of visual light is disclosed. A light emitting device includes a solid state light emitter and a phosphor layer. The solid state light emitter, for example, is configured to convert electrical energy to optical light. The phosphor layer includes a first surface and a second surface, wherein the first surface, for example, is the top surface while the second surface is the bottom surface. The phosphor layer is disposed over the solid state light emitter for generating luminous light in response to the optical light. The first surface of the phosphor layer, in one embodiment, is configured to include a texture, which has similarly shaped uniform configurations, capable of reducing total internal reflection.Type: ApplicationFiled: October 6, 2010Publication date: February 3, 2011Applicant: BRIDGELUX, Inc.Inventors: Tao Xu, Alex Shaikevitch
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Patent number: 7880378Abstract: Provided is a means for improving the capability of injecting electrons from a cathode in a luminous element and solving problems about the production process thereof. In the present invention, a material having a smaller work function than a cathode material is used to form an inorganic conductive layer between the cathode and an organic compound layer. In this way, the capability of injecting electrons from the cathode can be improved. Furthermore, the film thereof can be thicker than that of a conventional cathode buffer layer formed by using an insulating material. Therefore, the film thickness can easily be controlled, and a decrease in production costs and an improvement in yield can be achieved.Type: GrantFiled: February 9, 2010Date of Patent: February 1, 2011Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Keitaro Imai
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Patent number: 7868534Abstract: A mother glass including a plurality of organic electro luminescence arrays having a scan pad and a data pad, wherein the plurality of organic electro luminescence arrays are arranged in a matrix type, comprising a non-array area, arranged between the organic electro luminescence arrays arranged in the matrix type, and an edge area located at an exterior of the arrangement of the matrix; at least more than one positive shorting bar formed at the edge area to supply with a positive voltage; at least more than one negative shorting bar formed at the edge area to supply with a negative voltage; a first line formed at the non-array area to electrically connect the data pad, formed in each of organic electro luminescence arrays, to the positive shorting bar; and a second line formed at the non-array area to electrically connect the scan pad, formed in each of organic electro luminescence arrays, to the negative shorting bar.Type: GrantFiled: February 3, 2009Date of Patent: January 11, 2011Assignee: LG Display Co., Ltd.Inventor: Il Ho Lee
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Publication number: 20110001422Abstract: In a lighting package, a printed circuit board supports at least one light emitting die. A light transmissive cover is disposed over the at least one light emitting die. A phosphor is disposed on or inside of the light transmissive dome-shaped cover. The phosphor outputs converted light responsive to irradiation by the at least one light emitting die. An encapsulant substantially fills an interior volume defined by the light-transmissive cover and the printed circuit board.Type: ApplicationFiled: September 17, 2010Publication date: January 6, 2011Inventors: Srinath K. Aanegola, Emil V. Radkov, James Reginelli, Larry R. Stadelman, Matthew Mrakovich, Tomislav J. Stimac
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Publication number: 20110002137Abstract: A light emitting module includes a light emitting element, and a phosphor configured to emit visible light after being excited by the light emitted by the light emitting element. The light emitting element is structured such that the peak wavelength of the light, emitted by the light emitting element immediately after the start of an operation of the light emitting element, is shorter than that of an excitation spectrum for the phosphor, and the peak wavelength of the light emitted by the light emitting element is shifted toward that of the excitation spectrum for the phosphor with an increase in the temperature of the element due to its operation.Type: ApplicationFiled: July 2, 2010Publication date: January 6, 2011Applicant: KOITO MANUFACTURING CO., LTD.Inventors: Hitoshi TAKEDA, Tsukasa TOKIDA
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Patent number: 7863807Abstract: Systems for displaying images and fabrication method thereof are provided. A representative system incorporates an electroluminescent device including light emitting units emitting lights with different luminescent intensities along light emitting paths thereof, formed overlying a substrate. And a compensation layer is disposed along the light emitting paths to adjust the different luminescent intensities for outputting substantially uniform light.Type: GrantFiled: August 9, 2006Date of Patent: January 4, 2011Assignee: TPO Displays Corp.Inventors: Du-Zen Peng, Shih-Chang Chang, Chang-Ho Tseng
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Patent number: 7863602Abstract: In one embodiment, an organic light emitting diode (OLED) display is provided. The OLED display includes a substrate, a first signal line formed on the substrate, a second signal line intersecting the first signal line, a first thin film transistor connected to the first and second signal lines, a second thin film transistor connected to the first thin film transistor, a first electrode connected to the second thin film transistor, a second electrode provided at least partially opposite to the first electrode, and a light emitting member formed between the first electrode and the second electrode, wherein at least one of the first thin film transistor and the second thin film transistor includes a plurality of semiconductor layers having different crystallinity.Type: GrantFiled: November 21, 2006Date of Patent: January 4, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-Moo Huh, Seung-Kyu Park
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Patent number: 7863517Abstract: A solar power plant (10) capable of generating electricity comprising a light pipe carrying highly concentrated solar light (19), a hot reservoir (24), a cold reservoir (20), and a plurality of large-scale solid-state nano-structured photonic crystals (12) that are capable of recycling out-of-band photons with transition energies associated with a photovoltaic cell (13) into photons with in-band energies associated with the same photovoltaic cell (13) when photon energy is subjected to propagation through a thermal temperature gradient that is held across a suitably nano-structured photonic crystal (12). The input thermal photons from the hot thermal reservoir (24) are shifted in energy to the optimal photovoltaic cell energy for electron-hole pair generation by work that is expanded by the heat engine to convert said input photons into phonons and then back to photons again at a new wavelength through a process of phonon rethermalization occurring inside the nano-structured photonic crystal (12).Type: GrantFiled: August 30, 2005Date of Patent: January 4, 2011Assignee: Xtreme Energetics, Inc.Inventor: Leo David DiDomenico
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Patent number: 7863808Abstract: A resonant cavity color conversion EL element in which intensity of converted light from a color conversion layer is increased and an organic EL display device in which viewing angle dependence of the color tone is small and the manufacturing process is simple. The EL element includes at least a pair of electrodes; a functional layer includes a light-emitting layer and is sandwiched by the pair of electrodes; a color conversion layer that absorbs light emitted from the light-emitting layer and emits light with a different wavelength; and a pair of light reflective layers. Notably, the pair of light reflective layers are composed of a non-transparent reflective layer and a semi-transparent reflective layer that have a distance therebetween that is set at an optical distance to construct a microcavity that increases intensity of light with a specific wavelength emitted from the color conversion layer.Type: GrantFiled: February 10, 2009Date of Patent: January 4, 2011Assignee: Fuji Electric Holdings Co., Ltd.Inventor: Yutaka Terao
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Publication number: 20100327733Abstract: A multiple layer phosphor bearing film having a phosphor bearing layer comprising phosphor, a transparent protective layer, and an adhesive configured to adhere the film to a light source.Type: ApplicationFiled: July 27, 2010Publication date: December 30, 2010Applicant: Bridgelux, Inc.Inventor: ALEXANDER SHAIKEVITCH
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Patent number: 7859186Abstract: A white organic light emitting device includes an anode, a cathode, a charge generation layer arranged between the anode and the cathode and an organic layer arrangement arranged between the anode and the cathode, the organic layer arrangement including a green light emitting layer, a blue light emitting layer, and a red light emitting layer, one of the green light emitting layer, the blue light emitting layer, and the red light emitting layer includes a first light emitting layer and second light emitting layer, the charge generation layer being arranged between the first light emitting layer and the second light emitting layer.Type: GrantFiled: March 3, 2008Date of Patent: December 28, 2010Assignee: Samsung Mobile Display Co., Ltd.Inventors: Tae-yong Noh, Shinichiro Tamura, Byoung-ki Choi, Myeong-suk Kim, Yu-jin Kim, Eun-sil Han
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Patent number: 7859182Abstract: Light emitting apparatuses including warm white LED based lights including a semiconductor light source and a phosphor material including a yellow emitting phosphor, a red emitting phosphor, and, optionally, at least one of a green, blue or green-blue emitting phosphor.Type: GrantFiled: June 4, 2007Date of Patent: December 28, 2010Assignee: Lumination LLCInventors: Emil Vergilov Radkov, Anant Achyut Setlur, Ilona Elisabeth Hausmann, Marisa L. Goodin, legal representative
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Patent number: 7855501Abstract: A light-emitting device (1) includes a substrate (10), a light-emitting element (12) that is mounted on the substrate (10) and includes a luminous region (12b) and a nonluminous region (12a), and a phosphor layer (13) that is formed to cover the light-emitting element (12). The thickness of the phosphor layer (13a) located on the nonluminous region (12a) is smaller than that of the phosphor layer (13b) located on the luminous region (12b). The light-emitting device (1) can suppress nonuniform luminescent color.Type: GrantFiled: May 11, 2006Date of Patent: December 21, 2010Assignee: Panasonic CorporationInventors: Noriyasu Tanimoto, Toshifumi Ogata, Satoshi Shida, Hiroyuki Naito
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Patent number: 7851990Abstract: A method for generating low color temperature light and a light emitting device adopting the same, comprise a LED component, phosphor capable to be excited by the emission light of the LED component, and a package colloid for encapsulating the LED component and the phosphor, wherein the package colloid is provided with a electrode lead for connecting the LED component with the external power supply, the peak wavelength of emission light of the LED light is 460-500 nm, the peak wavelength of emission light of the excited phosphor is 580-630 nm. The present invention only use one chip and one kind of phosphor to generate the low color temperature light which is of the same effect as that of the minitype tungsten lamp or the high pressure sodium lamp, and is of advantages including energy saving, low cost and environmental protection, etc. The present invention can be widely used in the manufacturing process of LED lamp of low color temperature, especially in the manufacturing the mini LED bulb.Type: GrantFiled: September 6, 2007Date of Patent: December 14, 2010Assignee: He Shan Lide Electronic Enterprise Company Ltd.Inventor: Ben Fan
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Publication number: 20100308709Abstract: A brightness improving structure of a light-emitting module with an optical film surface layer 12, wherein a light-emitting part 20 is provided inside a transparent envelop 10 and may emit ultraviolet or blue light, the said transparent envelop 10 has first wall and second wall, first inside wall 101 and second inside wall 103 are oppositely formed inside thereof, first outside wall 102 and second outside wall 104 are oppositely formed outside thereof. The first wall is partly or entirely provided with the optical film coating 12, the optical film coating 12 may at least reflect the ultraviolet or blue light exciting fluorescent/phosphorescent light, and may pass light rays comprising visible light. A visible light layer or both the visible light layer and a reflective layer are provided on the second wall, and the said light-emitting part 20 is placed at a setting location from the envelop 10.Type: ApplicationFiled: November 30, 2007Publication date: December 9, 2010Inventor: Jenn-Wei MII
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Publication number: 20100301727Abstract: An LED bulb, which includes a shell, a filler material within the shell of the bulb, at least one type of phosphor dispersed inside the filler material and at least one LED within the shell.Type: ApplicationFiled: September 12, 2008Publication date: December 2, 2010Applicant: SUPERBULBS, INC.Inventors: Ronald J. Lenk, Bruce Carsten
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Patent number: 7843123Abstract: The organic light-emitting device of the present invention includes a plurality of organic light-emitting elements including an organic light-emitting element showing a first emission color and at least one organic light-emitting element showing a different emission color from the first emission color, each of the organic light-emitting elements including: a first electrode having a reflective surface; a second electrode placed on a light extraction side and including a semi-transparent layer; an organic compound layer including a light-emitting layer and formed between the first electrode and the second electrode; and a micro cavity structure for resonating light emitted from the light-emitting layer between the reflective surface and the semi-transparent layer, wherein the semi-transparent layer in the organic light-emitting element showing the first emission color is different in thickness and/or material from the semi-transparent layer in the at least one organic light-emitting element showing the differeType: GrantFiled: August 31, 2007Date of Patent: November 30, 2010Assignee: Canon Kabushiki KaishaInventors: Nobutaka Mizuno, Koichi Fukuda
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Publication number: 20100295442Abstract: A solid state illumination device includes a semiconductor light emitter mounted on a base and surrounded by sidewalls, e.g., in a circular, elliptical, triangular, rectangular or other appropriate arrangement, to define a chamber. A top element, which may be reflective, may be coupled to the sidewalls to further define the chamber. The light produced by the semiconductor light emitter is emitted through the sidewalls of the chamber. The sidewalls and/or top element may include wavelength converting material, for example, as a plurality of dots on the surfaces. An adjustable wavelength converting element may be used within the chamber, with the adjustable wavelength converting element being configured to adjust the surface area that is exposed to the light emitted by the semiconductor light emitter in the chamber to alter an optical property of the chamber.Type: ApplicationFiled: July 31, 2010Publication date: November 25, 2010Applicant: XICATO, INC.Inventors: Gerard Harbers, Mark A. Pugh
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Patent number: 7839072Abstract: A translucent laminate sheet includes at least one type of organic phosphor to make wavelength conversion of light emitted from a light source, and light-transmitting members to seal the organic phosphor. The light-transmitting members are formed by two plate-like members and the organic phosphor is disposed to be held between the two plate-like members. A frame member is disposed between the two plate-like members, and the organic phosphor is hermetically sealed in a space surrounded by the frame member and the two plate-like members.Type: GrantFiled: May 24, 2007Date of Patent: November 23, 2010Assignee: Citizen Electronics Co., Ltd.Inventors: Megumi Horiuchi, Toshiro Yukinari
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Patent number: 7839081Abstract: An emissive device includes a substrate; a plurality of light-emitting elements disposed on the substrate; a light-shielding layer opposite the substrate, the light-emitting elements being disposed between the substrate and the light-shielding layer, and the light-shielding layer having light-transmitting portions that transmit light emitted from the light-emitting elements; and a partition composed of an insulating material and disposed on the substrate, the partition partitioning the light-emitting elements and having openings each demarcating the light-emitting region of the corresponding light-emitting element, wherein each of the light-transmitting portions overlaps the corresponding opening and is smaller than the corresponding opening.Type: GrantFiled: December 19, 2006Date of Patent: November 23, 2010Assignee: Seiko Epson CorporationInventors: Takehiko Kubota, Eiji Kanda
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Publication number: 20100289395Abstract: An LED-powered replacement for the conventional incandescent screw-in light bulb comprises a phosphor coated sphere emitting white light into the same spherical pattern as a frosted incandescent bulb. In one embodiment inside the hollow sphere there is a dielectric cone emitting blue light, which causes the phosphor coating to glow. The blue light comes into the cone from a dielectric totally internally reflecting concentrator (DTIRC), which receives light from a conical reflector surrounding an LED array. The array has blue chips for energizing the phosphor and red chips for supplementing the phosphor light, enabling separate electronic control of the color temperature as well as the overall luminosity of the LED Lamp. Both blue and red chips are controlled by a quantum dimmer.Type: ApplicationFiled: May 12, 2010Publication date: November 18, 2010Applicant: Light Prescriptions Innovators, LLCInventors: Yupin Sun, Waqidi Falicoff, Will Shatford
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Patent number: 7834546Abstract: An apparatus such as a light source has a multi element light extraction and luminescence conversion layer disposed over a transparent layer of the light source and on the exterior of said light source. The multi-element light extraction and luminescence conversion layer includes a plurality of light extraction elements and a plurality of luminescence conversion elements. The light extraction elements diffuses the light from the light source while luminescence conversion elements absorbs a first spectrum of light from said light source and emits a second spectrum of light.Type: GrantFiled: November 29, 2007Date of Patent: November 16, 2010Assignee: Osram Opto Semiconductors GmbHInventors: Benjamin Claus Krummacher, Homer Antoniadis
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Patent number: 7834538Abstract: To provide an aspect of a novel display device using a light emitting element which is composed of a cathode, an EL layer and an anode, and a manufacturing device of the display device. According to the present invention, dual-sided emission display can be performed in one sheet white color light emitting panel 1001 in which, for example, different images can be displayed on a topside screen and backside screen (full color display, monochrome display or area color display). Two polarizing plates 1002, 1003 are formed by shifting the position thereof with an angular deviation of 90 degrees each other so as to prevent outside light from passing through the pane, thereby realizing a black display when not displayed.Type: GrantFiled: December 11, 2006Date of Patent: November 16, 2010Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Hiroko Abe, Masakazu Murakami, Ryoji Nomura
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Patent number: 7834953Abstract: A light unit includes a light emitting chip emitting light, a light conversion layer disposed on the light emitting chip, and the light conversion layer including a resin layer and semiconductor particles distributed on the resin layer, and a buffer layer interposed between the light emitting chip and the light conversion layer.Type: GrantFiled: November 5, 2008Date of Patent: November 16, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Hae-Il Park, Jin-Seob Byun, Jae-Byung Park, Sung-Jin Hong, Don-Chan Cho
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Patent number: 7828460Abstract: 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: GrantFiled: April 18, 2007Date of Patent: November 9, 2010Assignee: Cree, Inc.Inventors: Antony Paul Van De Ven, Gerald H. Negley
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Patent number: 7821195Abstract: A high color expression display device and a method for manufacturing the same are provided. The display device includes a backlight module and a display panel for receiving light from the backlight module. The display panel has a color filter layer which consists of a plurality of color resists above the backlight module. Lights from the backlight module pass through the color resists and out of the display panel to form an output light. A NTSC saturation of the output light may be greater or smaller than 60%, and a CIE standard illuminant C test result of the color resists may correspondingly fall into different predetermined scopes to prevent color shift and maintain brightness of the display device.Type: GrantFiled: January 21, 2010Date of Patent: October 26, 2010Assignee: Au Optronics CorporationInventors: Chun-Chieh Wang, Chung-Ting Chen, Chen-Hsien Liao, Chien-Chih Chen
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Patent number: 7821194Abstract: A solid state lighting apparatus includes a plurality of light emitting diodes (LEDs). Each of the LEDs includes an LED device configured to emit light having about a first dominant wavelength and a phosphor configured to receive at least some of the light emitted by the LED device and responsively emit light having about a second dominant wavelength. A combined light emitted by the LED device and the phosphor of a first one of the plurality of LEDs has a first color point and a combined light emitted by the LED device and the phosphor of a second one of the plurality of LEDs has a second color point that falls outside a seven step Macadam ellipse around the first color point.Type: GrantFiled: September 10, 2009Date of Patent: October 26, 2010Assignee: Cree, Inc.Inventors: Gerald H. Negley, Antony P. van de Ven
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Patent number: 7816862Abstract: To provide an electroluminescent device excellent in color rendition, the electroluminescent device has at least two luminescent local maxima in a visible range, the at least two luminescent local maxima including a first luminescent local maximum and a second luminescent local maximum, the first and second luminescent local maxima have the two largest values of the at least two luminescent local maxima, wherein the electroluminescent device has the first luminescent local maximum in a range of from 450 to 530 nm, and the electroluminescent device has the second local luminescent local maximum in a range of 605 nm or more.Type: GrantFiled: March 17, 2005Date of Patent: October 19, 2010Assignee: FUJIFILM CorporationInventors: Takafumi Noguchi, Kazuhiro Hasegawa, Tadanobu Sato
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Patent number: 7816855Abstract: A LED device is provided having a diffuse reflective surface which includes an LED chip emitting light, a reflector cup having the LED chip arranged at a bottom surface thereof and having an angled surface which diffusely reflects the light emitted by the LED chip, and a light conversion material provided in the reflector cup for converting the light emitted by the LED chip into visible light rays. The light-conversion material is spatially separated from the LED chip by a length equal or greater than the maximum length of the LED chip.Type: GrantFiled: December 28, 2005Date of Patent: October 19, 2010Assignees: Samsung LED Co., Ltd., Rensselaer Polytechnic InstituteInventors: Jae-hee Cho, Jong-kyu Kim, Cheol-soo Sone, E. Fred Schubert
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Patent number: 7812515Abstract: 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: GrantFiled: September 7, 2007Date of Patent: October 12, 2010Assignee: Hitachi Displays, Ltd.Inventors: Masaya Adachi, Kazutaka Tsuji, Hajime Murakami, Etsuko Nishimura
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Publication number: 20100244662Abstract: A luminescent light source (1) is configured to include: a substrate (10); a terminal (11) and a land (12) formed on the substrate (10); a light-emitting element (14) mounted on the land (12) via a bump (13); and a phosphor layer (15) that covers the light-emitting element (14) and is filled in an interstice between a principal surface of the substrate (10) and the light-emitting element (14), wherein the phosphor layer (15) contains a phosphor and a light-transmitting base material, and a content by volume of the phosphor in a part (15a) of the phosphor layer (15) filled in the interstice and a content by volume of the phosphor in a part (15b) of the phosphor layer (15) covering the light-emitting element (14) are substantially equal to each other.Type: ApplicationFiled: August 24, 2007Publication date: September 30, 2010Applicant: PANASONIC CORPORATIONInventors: Takaari Uemoto, Keiji Nishimoto, Yasuharu Ueno, Satoshi Shida
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Patent number: 7804237Abstract: A luminescence conversion of LED, which uses a blue emitting chip and two illuminating substances, whereby one emits a red and the other a yellow to green. Both illuminating substances are separated upstream from the chip.Type: GrantFiled: April 11, 2006Date of Patent: September 28, 2010Assignee: OSRAM Gesellschaft mit beschränkter HaftungInventors: Bert Braune, Frank Jermann, Jörg Strauβ
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Patent number: 7791265Abstract: Disclosed is a luminescent substance which has the structure EA3N2Si2O4:D, wherein EA=(Sr,Ba,Ca) and D=Eu, provides red emission, and is characterized by great stability and a simple production process. Said luminescent substance can be used for many different types of light sources.Type: GrantFiled: November 29, 2006Date of Patent: September 7, 2010Assignee: Osram Gesellschaft mit beschraenkter HaftungInventors: Tim Fiedler, Wolfram Hempel, Frank Jermann
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Publication number: 20100213820Abstract: A ?-sialon phosphor particle in which Eu (europium) is solid-soluted in a crystal having a ?-type Si3N4 crystal structure, wherein the median diameter (D50) in the particle size distribution curve of the primary particle is from 3.0 to 10 ?m and the aspect ratio is less than 1.5.Type: ApplicationFiled: October 6, 2008Publication date: August 26, 2010Applicant: UBE INDUSTRIES, LTD.Inventors: Takuma Sakai, Shin-ichi Sakata
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Publication number: 20100213821Abstract: A light-emitting device includes a light-emitting element for emitting primary light, and a wavelength conversion unit for absorbing part of the primary light and emitting secondary light having a wavelength longer than that of the primary light, wherein the wavelength conversion unit includes plural kinds of phosphors having light absorption characteristics different from each other, and then at least one kind of phosphor among the plural kinds of phosphors has an absorption characteristic that can absorb the secondary light emitted from at least another kind of phosphor among the plural kinds of phosphors.Type: ApplicationFiled: May 5, 2010Publication date: August 26, 2010Applicant: SHARP KABUSHIKI KAISHAInventors: Masatsugu Masuda, Masaaki Katoh, Tsukasa Inoguchi
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Publication number: 20100213852Abstract: A light source apparatus that comprises a blue light emitting diode and a fluorescent material film capable of converting the blue light emitted from the blue light emitting diode into white light, wherein the fluorescent material film is formed by coating, on a glass substrate, a dispersion prepared by dispersing a composition containing metallic oxide fine particles and a yellow fluorescent material capable of absorbing part of the blue light, thereby emitting yellow light, in a metallic alkoxide and/or metallic alkoxide oligomer, followed by firing.Type: ApplicationFiled: February 1, 2010Publication date: August 26, 2010Applicant: USHIO DENKI KABUSHIKI KAISHAInventor: Yuji Imai
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Patent number: 7781953Abstract: A light-emitting device with open-loop control including a LED capable of emitting a blue light and a mix-light adjusting portion is provided. The mix-light adjusting portion includes a first and a second fluorescent material both capable of being excited by blue light. When the first and the second fluorescent material are excited by a short-wavelength blue light, the excitation intensity of the first fluorescent material is higher than that of the second fluorescent material. When the first and the second fluorescent material are excited by a long-wavelength blue light, the excitation intensity of the first fluorescent material is lower than that of the second fluorescent material. The peak wavelength of the emission of the first fluorescent material is smaller than that of the emission of the second fluorescent material. The dividing wavelength between the short-wavelength blue light and the long-wavelength blue light ranges from a first to a second wavelength.Type: GrantFiled: April 16, 2007Date of Patent: August 24, 2010Assignee: Lite-On Technology Corp.Inventor: Hung-Yuan Su