Light Conversion Patents (Class 313/501)
-
Patent number: 8994262Abstract: A light-emitting element according to an embodiment of the present invention includes a body including an upper surface, a lower surface opposite to the upper surface, and a peripheral side surface extending between peripheral edges of the upper surface and peripheral edges of the lower surface, the peripheral side surface including a front surface and a rear surface opposite to the front surface; a pair of element electrodes as a first element electrode and a second element electrode positioned at the rear surface of the body; and a support disposed at the rear surface of the body between the first element electrode and the second element electrode that are positioned at a lower area of the rear surface of the body.Type: GrantFiled: September 14, 2012Date of Patent: March 31, 2015Assignees: Citizen Electronics Co., Ltd., Citizen Holdings Co., Ltd.Inventor: Takashi Iino
-
Patent number: 8987985Abstract: Provided is an OLED device and method of making the OLED device. According to an embodiment, the OLED device incorporates a microcavity structure including a dielectric mirror formed on a glass substrate, an anode formed above the dielectric mirror, an organic film layer formed above the anode, and a reflective electrode formed above the organic film layer such that the cavity is formed in the organic film layer by the dielectric mirror and the reflective electrode. The OLED device with microcavity structure can incorporate one or more phosphors deposited on an underside of the glass substrate such that light of additional wavelengths can be generated by the OLED device.Type: GrantFiled: April 9, 2008Date of Patent: March 24, 2015Assignee: University of Florida Foundation, Inc.Inventor: Franky So
-
Patent number: 8981639Abstract: Disclosed is a light-emitting device (1) including a light-emitting element (2) emitting primary light, and a light converter (3) absorbing a part of the primary light emitted from the light-emitting element (2) and emitting secondary light having a longer wavelength than the primary light. The light converter (3) contains a green light-emitting phosphor (4) and a red light-emitting phosphor (5). The green light-emitting phosphor (4) is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuaSibAlcOdNe and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(Ba1-f-gMIfEug)O.SiO2, while the red light-emitting phosphor (5) is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII2(MIII1-hMnh)F6 and/or MIV(MIII1-hMnh)F6.Type: GrantFiled: August 27, 2014Date of Patent: March 17, 2015Assignee: Sharp Kabushiki KaishaInventors: Masatsugu Masuda, Kenji Terashima
-
Patent number: 8975812Abstract: A polarization structure for a display device is disclosed. In one embodiment, the structure includes a retardation layer, a first polarizing layer, a first uniaxial optical compensation layer, a second polarizing layer and a second uniaxial optical compensation layer. The retardation layer may be configured to create a phase difference between two polarization components of an incident light. The first polarizing layer may be disposed on the retardation layer. The first uniaxial optical compensation layer may be disposed on the first polarizing layer. The second polarizing layer may be disposed on the first uniaxial optical compensation layer. The second uniaxial optical compensation layer may be disposed between the first polarizing layer and the first uniaxial optical compensation layer or between the first polarizing layer and the second polarizing layer.Type: GrantFiled: September 13, 2012Date of Patent: March 10, 2015Assignee: Samsung Display Co., Ltd.Inventors: Jae-Ik Lim, Man-Seob Choi, Yi-Joon Ahn, Gee-Bum Kim, Yong-Seok Yeo
-
Patent number: 8975815Abstract: The invention relates to a method for making an electronic display device (1) having a screen (3) covered by a protection plate, and to a substrate (2) covered by said screen for obtaining such a device. The method comprises the following steps: a) applying glue (10) at the non cross-linked state substantially on the entire surface of the screen and/or the assembling surface (11a) of the plate (11) following a deposit on the screen connection area (5) of at least one organic layer (15) for protecting the connection area from the glue; applying the assembling surface against the screen via the glue; c) emitting a radiation through the plate for cross-linking the glue; and d) removing a portion of the plate covering the connection area so that the latter can be electrically accessible, the protection layer being removed from the connection area upon said removal or during a further surface processing step.Type: GrantFiled: January 12, 2009Date of Patent: March 10, 2015Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventors: Christophe Prat, Tony Maindron
-
Patent number: 8970106Abstract: According to one aspect of the present invention, a laminated structure of conductive transparent oxide layers containing silicon or silicon oxide is applied as an electrode on the side of injecting a hole (a hole injection electrode; an anode) instead of the conventional conductive transparent oxide layer such as ITO. In addition, according to another aspect of the invention, a laminated structure of conductive transparent oxide layers containing silicon or silicon oxide, each of which content is different, is applied as a hole injection electrode. Preferably, silicon or a silicon oxide concentration of the conductive layer on the side where it is connected to a TFT ranges from 1 atomic % to 6 atomic % and a silicon or silicon oxide concentration on the side of a layer containing an organic compound ranges from 7 atomic % to 15 atomic %.Type: GrantFiled: January 30, 2012Date of Patent: March 3, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Toru Takayama, Naoya Sakamoto, Kengo Akimoto, Keiji Sato, Tetsunori Maruyama
-
Patent number: 8970101Abstract: A system including a base portion, which includes first and second sets of light emitting diodes (LEDs) to emit blue light having first and second wavelengths in first and second wavelength ranges in a spectrum of blue light, a glass layer arranged at a second predetermined distance from the base portion, and a plurality of coatings of first and second phosphors having a predetermined length arranged in an alternating pattern on a surface of the glass layer facing toward the LEDs. The LEDs of the first and second sets are arranged on the base portion in an alternating pattern and are separated from each other by a first predetermined distance. Centers of the coatings of the first and second phosphors respectively align with centers of corresponding LEDs in the first and second sets.Type: GrantFiled: February 14, 2014Date of Patent: March 3, 2015Assignee: Marvell World Trade Ltd.Inventors: Sehat Sutardja, Ravishanker Krishnamoorthy
-
Patent number: 8957574Abstract: The present invention relates to an organic electro-luminescence display device and a method for fabricating the same, in which damage to a pad portion is prevented for improving yield. The organic electro-luminescence display device includes a thin film transistor array unit formed on a front surface of a lower substrate and a pad portion extended from the thin film transistor array unit, an organic EL array unit on the thin film transistor array unit having a matrix of organic EL cells, and a protective member for protecting the organic EL array unit and the thin film transistor array unit and exposing the pad portion to an outside, wherein the lower substrate has a thickness of a first region overlapped with the pad portion thicker than a thickness of a second region overlapped with the thin film transistor array unit.Type: GrantFiled: October 24, 2012Date of Patent: February 17, 2015Assignee: LG Display Co., Ltd.Inventors: Jae-Young Lee, Tae-Yeon Yoo
-
Patent number: 8957578Abstract: An organic light emitting display device may include a substrate, a first electrode, a light emitting structure, a second electrode and a nanostructure. The first electrode may be disposed over the substrate. The light emitting structure may be disposed over the first electrode. The second electrode may be disposed over the light emitting structure. A plurality of nanoparticles may be disposed over the second electrode. The plurality of nanoparticles is capable of causing surface plasmon resonance by light. At least some of the plurality of nanoparticles have materials, sizes and shapes determined to cause surface plasmon resonance by light having a predetermined wavelength and emitted from the light emitting structure.Type: GrantFiled: July 3, 2012Date of Patent: February 17, 2015Assignee: Samsung Display Co., Ltd.Inventor: Hyun-Shik Lee
-
Patent number: 8955996Abstract: In one embodiment, an LED light bulb includes an LED module, a base portion on which the LED module is disposed, and a globe attached to the base portion. The LED module includes an ultraviolet to violet light-emitting LED chip mounted on a substrate. A lighting circuit and a bayonet cap are provided in and on the base portion. A fluorescent film is provided on an inner surface of the globe, and emits white light by absorbing ultraviolet to violet light emitted from the LED chip. The fluorescent film has a film thickness in a range of 80 to 800 ?m. In the LED light bulb, an amount of ultraviolet light which leaks from the globe is 0.1 mW/nm/lm or less.Type: GrantFiled: December 11, 2012Date of Patent: February 17, 2015Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Yasumasa Ooya, Masahiko Yamakawa, Yasuhiro Shirakawa, Katsutoshi Nakagawa
-
Patent number: 8946987Abstract: A light emitting device and a fabricating method thereof are described, wherein the light emitting device includes a substrate, a wall, a first LED chip and a light conversion filling. The first LED chip is disposed on a surface of the substrate. The wall is disposed on the surface of the substrate, and surrounds the first LED chip. A first angle between a central axis of the wall and an inner surface of the wall is 0 degree or is acute, a second angle between the central axis of the wall and an outer surface of the wall is 0 degree or is acute, and the outer surface of the wall and the substrate has a space therebetween. The light conversion filling is surrounded by the light conversion wall, and is disposed on the first LED chip.Type: GrantFiled: December 28, 2012Date of Patent: February 3, 2015Assignee: Industrial Technology Research InstituteInventors: Chia-Fen Hsieh, Chien-Chun Lu, Ya-Hui Chiang, Chen-Peng Hsu, Hung-Lieh Hu
-
Patent number: 8941293Abstract: Solid state lighting devices containing quantum dots dispersed in polymeric or silicone acrylates and deposited over a light source. Solid state lighting devices with different populations of quantum dots either dispersed in matrix materials or not are also provided. Also provided are solid state lighting devices with non-absorbing light scattering dielectric particles dispersed in a matrix material containing quantum dots and deposited over a light source. Methods of manufacturing solid state lighting devices containing quantum dots are also provided.Type: GrantFiled: January 28, 2011Date of Patent: January 27, 2015Assignee: Samsung Electronics Co., Ltd.Inventors: Kwang-Ohk Cheon, Jennifer Gillies, David Socha, David Duncan, Michael Locasio
-
Patent number: 8933621Abstract: A light emitting device includes a substrate including a base member, a plurality of wiring portions disposed on a surface of the base member, a covering portion having openings respectively exposing a part of the wiring portions, a plurality of light emitting elements respectively electrically connected to the wiring portions exposed from the covering portion, and sealing members respectively sealing the light emitting elements. At least a part of the covering portion contains a light-storing material.Type: GrantFiled: September 25, 2013Date of Patent: January 13, 2015Assignee: Nichia CorporationInventors: Takeshi Tamura, Hiroaki Shozui, Yasuo Fujikawa
-
Patent number: 8933620Abstract: Provided is an LED module and an illumination device having high color saturation, which improve vividness of color of an illuminated object even if color temperature of ambient light is high, and consequently are able to reproduce colors of the object as desired. Blue LEDs have peak wavelength of 420 nm to 470 nm and FWHM of greater than 0 nm and no greater than 50 nm. A green phosphor has peak wavelength of 500 nm to 535 nm and FWHM of 100 nm to 110 nm. A red phosphor has peak wavelength of 610 nm to 670 nm and FWHM of 85 nm to 95 nm. Mixed-color light of the blue, green and red light has correlated color temperature of 4600 K to 7200 K and Duv of ?12 to ?6.Type: GrantFiled: August 29, 2011Date of Patent: January 13, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Toshio Mori, Hiromi Tanaka
-
Patent number: 8926110Abstract: 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: GrantFiled: November 1, 2012Date of Patent: January 6, 2015Assignee: Panasonic CoporationInventors: Ayako Tsukitani, Sayaka Yamaguchi, Takashi Saito
-
Patent number: 8928221Abstract: A display device having a plurality of light-emitting elements that construct picture elements aligned on a TFT substrate in a formation of a matrix. The display device includes the plurality of light-emitting elements each having a flat surface portion and including a light-emitting layer, an anode, and a cathode; a plurality of driver elements each coupled to the light-emitting element; a plurality of capacitor elements each of which is coupled to the light emitting element and receives an image signal; a plurality of switching elements each of which is coupled to the capacitor element and the light emitting element and control input of the image signal to the capacitor; and an insulation layer having a contact hole formed over the driver element. The anode is formed on the insulation layer and coupled to the driver element via the contact hole.Type: GrantFiled: July 9, 2014Date of Patent: January 6, 2015Assignees: Japan Display Inc, Panasonic Liquid Crystal Display Co., Ltd.Inventors: Masaya Adachi, Kazutaka Tsuji, Hajime Murakami, Etsuko Nishimura
-
Patent number: 8922111Abstract: Some embodiments disclosed herein include a ceramic body including a first region and a second region. The first region may include a host material and first concentration of a dopant that is effective to produce luminescence. The second region may include the host material and second concentration of the dopant. In some embodiments, the first region has an average grain size that is larger than an average grain of the second region. The ceramic body may, in some embodiments, exhibit superior internal quantum efficiency (IQE). Some embodiments disclosed herein include methods for the making and using the ceramic bodies disclosed herein. Also, some embodiments disclosed herein lighting apparatuses including the ceramic bodies disclosed herein.Type: GrantFiled: March 5, 2013Date of Patent: December 30, 2014Assignee: Nitto Denko CorporationInventors: Bin Zhang, Hiroaki Miyagawa, Toshitaka Nakamura
-
Patent number: 8921878Abstract: A light emitting device according to one embodiment includes a board; a light emitting element mounted on the board, emitting light having a wavelength of 250 nm to 500 nm; a red fluorescent layer formed on the element, including a red phosphor expressed by equation (1), having a semicircular shape with a diameter r; (M1?x1Eux1)aSibAlOcNd??(1) (In the equation (1), M is an element that is selected from IA group elements, IIA group elements, IIIA group elements, IIIB group elements except Al (Aliminum), rare-earth elements, and IVB group elements), an intermediate layer formed on the red fluorescent layer, being made of transparent resin, having a semicircular shape with a diameter D; and a green fluorescent layer formed on the intermediate layer, including a green phosphor, having a semicircular shape. A relationship between the diameter r and the diameter D satisfies equation (2): 2.0r(?m)?D?(r+1000)(?m).Type: GrantFiled: August 22, 2011Date of Patent: December 30, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Iwao Mitsuishi, Kunio Ishida, Yumi Fukuda, Aoi Okada, Naotoshi Matsuda, Keiko Albessard, Shinya Nunoue, Masahiro Kato
-
Patent number: 8919975Abstract: The present disclosure relates to lighting device configurations that render colors well and provide high quality white light.Type: GrantFiled: November 9, 2011Date of Patent: December 30, 2014Assignee: Cree, Inc.Inventors: Antony Paul van de Ven, Gerald H Negley
-
Patent number: 8917014Abstract: Certain example embodiments relate to organic light emitting diode (OLED) inclusive devices, and/or methods of making the same. A substrate supports a transparent conductive coating (TCC) based layer, and first and second organic layers disposed thereon. A reflective conductive layer is supported by the organic layers. An out-coupling layer stack (OCLS) interposed between the organic layers and a viewer of the device includes a hybrid organic-inorganic polymer matrix having scatterers dispersed throughout in a manner such that each scatterer is located in the far field of its nearest neighbor. The scatterers are dispersed to have a high Zeta potential, and promote Mie-like scattering of light passing through the OCLS. Mie-like scattering caused by the OCLS may help to frustrate the wave-guiding modes in the glass, e.g., by breaking down the in-phase coherence.Type: GrantFiled: November 20, 2013Date of Patent: December 23, 2014Assignee: Guardian Industries Corp.Inventor: Vijayen S. Veerasamy
-
Patent number: 8917010Abstract: In a first aspect of the present invention, a lighting device includes a light-emitting element, a phosphor layer including a phosphor and spaced from the light-emitting element, and a light-transmitting layer with thermal conductivity that is higher than thermal conductivity of the phosphor layer, the light-transmitting layer disposed in contact with the phosphor layer. It is disclosed that the phosphor layer has first and second surfaces opposite to each other. In some embodiments, the light-transmitting layer that transmits light emitted from the light-emitting element is disposed on the first surface of the phosphor layer. It is also disclosed that the first light-transmitting layer that transmits light emitted from the light-emitting element is disposed on the first surface of the phosphor layer and a second light-transmitting layer that transmits visible light is disposed on the second surface of the phosphor layer.Type: GrantFiled: February 1, 2013Date of Patent: December 23, 2014Assignees: Citizen Electronics Co., Ltd., Citizen Holdings Co., Ltd.Inventors: Takakazu Yano, Masato Yazaki, Masatoshi Sasuga, Mitsunori Miyamoto
-
Patent number: 8907557Abstract: A light-emitting diode (LED) fluorescent lamp which can replace a typical fluorescent lamp is provided. The LED fluorescent lamp includes an LED array including a plurality of LEDs connected in series; first through fourth connection pins; first through fourth capacitors connected to the first through fourth connection pins, respectively; a first diode having an commonly connected to second ends of the first and third capacitors and a cathode connected to a first end of the LED array; a second diode having an anode connected to a second end of the LED array and a cathode commonly connected to second ends of the second and fourth capacitors. The LED fluorescent lamp can replace a typical fluorescent lamp without a requirement of the installation of additional equipment or the change of wiring.Type: GrantFiled: December 7, 2012Date of Patent: December 9, 2014Assignees: Kumho Electric Inc.Inventor: Myung Koo Park
-
Patent number: 8907558Abstract: A white light emitting device includes a light emitting element having a peak wavelength at from 430 nm to 460 nm; and a fluorescent layer on the light emitting element containing a red fluorescent material and a green-yellow fluorescent material. The white light emitting device achieves high color rendering properties, a high average color rendering index Ra and a high luminescent efficiency, or a high white efficiency.Type: GrantFiled: October 4, 2012Date of Patent: December 9, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Ryosuke Hiramatsu, Kunio Ishida
-
Patent number: 8907362Abstract: In accordance with certain embodiments, semiconductor dies are embedded within polymeric binder to form, e.g., freestanding white light-emitting dies and/or composite wafers containing multiple light-emitting dies embedded in a single volume of binder.Type: GrantFiled: July 24, 2013Date of Patent: December 9, 2014Assignee: Cooledge Lighting Inc.Inventor: Michael A. Tischler
-
Patent number: 8906718Abstract: On a surface of a substrate (3) on which surface a vapor-deposited film is to be formed, a photoresist (13) is formed so as to have an opening in a sealing region including a display region (R1) which sealing region is formed by a sealing resin (11) of a frame shape. Then, luminescent layers (8R, 8G, and 8B) having a striped pattern are formed. Subsequently, the photoresist (13) is removed with the use of an exfoliative solution so as to form the luminescent layers (8R, 8G, and 8B) patterned with high definition.Type: GrantFiled: December 20, 2011Date of Patent: December 9, 2014Assignee: Sharp Kabushiki KaishaInventors: Tohru Sonoda, Shinichi Kawato, Satoshi Inoue, Satoshi Hashimoto
-
Patent number: 8901810Abstract: The present invention relates to an organic light emitting device (OLED) (100;200;400;800;900;1000;1100;1200) comprising a first substrate layer (101;201;401;501;701;1004;1104;1205) and a second substrate layer(102;202; 402;502;704; 1005;1105;1206). The device (100;200;400;800;900;1000;1100;1200) further comprises at least a first OLED assembly (103;403;503;901;1001;1101;1202) and a second OLED assembly (104;404;504;902;1002;1102;1203) arranged between the first and the second substrate layers. Each of the first and second OLED assemblies comprises a first electrically conductive layer(105;505;703), a second electrically conductive layer (106;506;706) and an organic light emitting layer (107;507;507?;707) arranged between the first and the second electrically conductive layer. The organic light emitting device (100;200;400;800;900;1000;1100;1200) of the invention allows for an increased light intensity and is suitable for large area applications.Type: GrantFiled: March 1, 2013Date of Patent: December 2, 2014Assignee: Koninklijke Philips N.V.Inventors: Ties Van Bommel, Rifat Ata Mustafa Hikmet, Coen Adrianus Verschuren
-
Patent number: 8901816Abstract: Write in of lower significant bits of a digital video signal to a memory is eliminated by a memory controller of a signal control circuit in a display device during a second display mode in which the number of gray scales is reduced, as compared to a first display mode. Further, read out of the lower significant bits of the digital video signal from the memory is also eliminated. The amount of information of digital image signals input to a source signal line driver circuit is reduced. Corresponding to this operation, a display controller functions to make start pulses and clock pulses input to each driver circuit have a lower frequency, and write in periods and display periods of sub-frame periods participating in display are set longer.Type: GrantFiled: July 25, 2012Date of Patent: December 2, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Jun Koyama
-
Patent number: 8901811Abstract: An embodiment of the present invention discloses a light-emitting device including a first light source, a second light source, and an optical element. The first light source is configured to emit a first light at a first low temperature and a first high temperature, and has a first hot/cold factor. The second light source is configured to emit a second light at the first low temperature and the first high temperature, and has a second hot/cold factor. The optical element is configured to generate a third light by the excitation of the first light, and reach a second high temperature higher than the first high temperature under the irradiation of the first light.Type: GrantFiled: August 27, 2013Date of Patent: December 2, 2014Assignee: Epistar CorporationInventors: Chiu-Lin Yao, Ming-Chi Hsu, Been-Yu Liaw
-
Patent number: 8896197Abstract: 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: GrantFiled: May 10, 2011Date of Patent: November 25, 2014Assignee: Cree, Inc.Inventors: Gerald H. Negley, Antony Paul Van De Ven
-
Patent number: 8896198Abstract: An LED lamp is disclosed comprising a remote phosphor patch on or near the interior surface of a translucent sphere. The phosphor is illuminated by an adjacent light box containing blue LEDs, located within the lamp below the transmissive phosphor patch or alternatively above a reflective phosphor patch. The reflective patch can be either fully or partially populated with phosphor. Below the light box is an electronics bay, and below that is an Edison screw-in base.Type: GrantFiled: May 19, 2011Date of Patent: November 25, 2014Assignee: Light Prescriptions Innovators, LLCInventors: Waqidi Falicoff, Yupin Sun, Will Shatford
-
Patent number: 8890395Abstract: A beamshaping optical stack (108), a light source and a luminaire is provided. The beamshaping optical stack (108) is to be optically coupled to a light emitting surface of a light emitter. The beamshaping optical stack (108) comprises a first light transmitting layer (120) and a second light transmitting layer (118). The second light transmitting layer (118) comprises a first side (110) which is optically coupled to the first light transmitting layer (120) to receive light from the first light transmitting layer (120). The second light transmitting layer (118) further comprises a second side (106) which is substantially opposite the first side (110) to emit the received light into another optical medium. The second light transmitting layer (118) further comprises a geometrical structure (116) at the second side (106) to obtain a decreasing light emission with increasing light emission angles (9a) with respect to a normal (112) to the first side (110).Type: GrantFiled: May 24, 2011Date of Patent: November 18, 2014Assignee: Koninklijke Philips N.V.Inventor: Ferry Zijp
-
Patent number: 8890394Abstract: It is an object of the present invention to provide a light-emitting device having a composition capable of reducing a film thickness of a heat conducting member.Type: GrantFiled: January 12, 2011Date of Patent: November 18, 2014Assignee: Sumitomo Chemical Company, LimitedInventor: Shoji Mima
-
Patent number: 8890403Abstract: The present invention provides a technology that allows reducing the used amount of a Mn4+-activated fluoride complex phosphor without loss of luminous efficiency, in a white light-emitting device that is provided with the Mn4+-activated fluoride complex phosphor and an LED element that is an excitation source of the phosphor. The present invention provides a white light-emitting device comprises a blue LED element, as well as a yellow phosphor and/or a green phosphor and a red phosphor as phosphors that are excited by the blue LED element. The red phosphor contains a Mn4+-activated fluoride complex phosphor and a Eu2+-activated alkaline earth silicon nitride phosphor.Type: GrantFiled: March 15, 2013Date of Patent: November 18, 2014Assignee: Mitsubishi Chemical CorporationInventors: Hiroaki Sakuta, Yoshihito Satou, Naoto Kijima, Byungchul Hong
-
Patent number: 8890402Abstract: The present invention provides an organic electroluminescence display device including an organic electroluminescence element which includes a transparent electrode, a counter electrode, and an organic compound layer provided between the transparent electrode and the counter electrode, the organic compound layer including a light emitting layer, and a fine particle-containing layer positioned in the optical path of light emitted from the light emitting layer and adjacent to the transparent electrode, wherein the fine particle-containing layer contain an organic resin material having a refractive index equal to or lower than the refractive index of the transparent electrode, and fine particles having a refractive index higher than the refractive index of the organic resin material and a weight average particle diameter of 0.5 ?m to 5 ?m, and the fine particle-containing layer has a thickness of 2 ?m to 10 ?m.Type: GrantFiled: January 13, 2010Date of Patent: November 18, 2014Assignee: UDC Ireland LimitedInventors: Hiroyuki Mori, Hidemasa Hosoda, Masanori Hikita
-
Patent number: 8890401Abstract: Traditional incandescent and halogen lamps produce a high CRI warm white light with indirect emission patterns at the cost of poor energy efficiency. This new advancement in solid-state lighting enables the production of a new solid-state filament wherein the tungsten filament is replaced with an array of high efficiency LED emitters which combine through an equiangular spiral, or t-spline/TNURCC lightpipe network to produce a single homogeneous blue light source which then pumps a luminescent filament comprised of a phosphor loaded silicone, phosphor loaded polymer, a lanthanide doped fluoro-phosphate glass, glass ceramic tape, quantum dot filled composite, or super-continuum spectrum producing photonic crystalline structure.Type: GrantFiled: February 25, 2009Date of Patent: November 18, 2014Assignee: Illumination Machines, LLCInventor: Edward E. Bailey
-
Patent number: 8884508Abstract: A solid state lighting device includes a solid state light emitter combined with a lumiphor to form a solid state light emitting component, at least one lumiphor spatially segregated from the light emitting component, and another lumiphor and/or solid state light emitter. The solid state light emitting component may include a blue shifted yellow component with a higher color temperature, but in combination with the other elements the aggregated emissions from the lighting device have a lower color temperature. Multiple white or near-white components may be provided and arranged to stimulate one or more lumiphors spatially segregated therefrom.Type: GrantFiled: November 9, 2011Date of Patent: November 11, 2014Assignee: Cree, Inc.Inventors: Paul Kenneth Pickard, Gerald H. Negley
-
Patent number: 8884509Abstract: A structure with which luminance of light extracted outside is improved in the case where a color filter is used is disclosed below. In an optical device including an optical element and a color conversion unit which light radiated from the optical element (light emitted from the optical element or light passing through the optical element) enters, the color conversion unit has a color filter region in which a color filter layer is provided and a transmissive region having higher transmittance per unit area than the color filter region.Type: GrantFiled: February 28, 2012Date of Patent: November 11, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Hideki Matsukura
-
Patent number: 8884510Abstract: An LED includes a chip having a light emitting surface, and a coating of phosphor-containing material on the light emitting surface. The phosphor-containing material comprises at least two quantities of different phosphor particles and are arranged in a densely packed layer within the coating at the light emitting surface. The densely packed layer of phosphor particles does not extend all the way through the coating.Type: GrantFiled: February 11, 2014Date of Patent: November 11, 2014Assignee: Cree, Inc.Inventors: James Ibbetson, Peter S. Andrews
-
Patent number: 8882299Abstract: Disclosed is a wavelength conversion member that is provided with: a light transmissive member including a light input plane into which excitation light is inputted, and a light output plane from which wavelength converted light is outputted; and a semiconductor fine particle phosphor, which is dispersed in the light transmissive member, and which absorbs the excitation light, converts the wavelength, and emits light. The dispersion concentration of the semiconductor fine particle phosphor in the direction parallel to the light traveling direction, i.e., the direction connecting the light input plane and the light output plane, is lower than the dispersion concentration of the semiconductor fine particle phosphor in the direction orthogonal to the light traveling direction.Type: GrantFiled: February 25, 2011Date of Patent: November 11, 2014Assignee: Sharp Kabushiki KaishaInventors: Junichi Kinomoto, Tatsuya Ryowa
-
Patent number: 8884326Abstract: In accordance with certain embodiments, semiconductor dies are embedded within polymeric binder to form, e.g., light-emitting dies and/or composite wafers containing multiple light-emitting dies embedded in a single volume of binder.Type: GrantFiled: March 25, 2014Date of Patent: November 11, 2014Assignee: Cooledge Lighting Inc.Inventor: Michael A. Tischler
-
Patent number: 8878430Abstract: This invention relates to a lighting device comprising a light generation unit (102), which comprises a light emitting diode element (105) having at least one light emitting diode (103), and a light conversion unit (104). The light conversion unit comprises an integral enclosure (110), which encloses a cavity (130), and an organic phosphor element (112) arranged within the cavity. The light generation unit further comprises a base part (114), which includes a thermally conductive material (114) thermally connected with the light emitting diode element. Light generated by the light emitting diode element of the light generation unit is output through the light conversion unit and thereby converted by the organic phosphor element.Type: GrantFiled: June 22, 2011Date of Patent: November 4, 2014Assignee: Koninklijke Philips N.V.Inventors: Niels de Koning, Pieter Van Der Wel, Rifat Hikmet, Koen Kriege, Hans Cillessen, René Wegh
-
Patent number: 8878429Abstract: A lighting device comprising sources of visible light comprising solid state light emitters and/or luminescent materials emitting three or four different hues. A first group of the sources, when illuminated, emit light of two hues which, if combined, would produce illumination having coordinates within an area on a 1931 CIE Chromaticity Diagram defined by points having coordinates: 0.59, 0.24; 0.40, 0.50; 0.24, 0.53; 0.17, 0.25; and 0.30, 0.12. A second group of the sources is of an additional hue. Mixing light from the first and second groups produces illumination within ten MacAdam ellipses of the blackbody locus. Also, a lighting device comprising a white light source having a CRI of 75 or less and at least one solid state light emitters and/or luminescent material. Also, methods of lighting.Type: GrantFiled: January 14, 2013Date of Patent: November 4, 2014Assignee: Cree, Inc.Inventors: Antony Paul Van De Ven, Gerald H. Negley
-
Patent number: 8876313Abstract: A method of illuminating livestock with artificial light sources. The method includes generating a first light having a first light output that provides white light at typical lumen levels for workers. Then by using a dimming device the light source can be dimmed to provide a blue light at under 3 lumen in order to provide artificial light to the diurnal avians representative of moonlight to cause the occurrence of a predetermined characteristic visual spectral response of the diurnal avian substantially enclosed habitat for diurnal avians.Type: GrantFiled: September 20, 2013Date of Patent: November 4, 2014Assignee: Once Innovations, Inc.Inventor: Zdenko Grajcar
-
Publication number: 20140319995Abstract: Disclosed is a display device. The display device includes: a light source; an optical sheet into which light is incident from the light source; a display panel disposed on the optical sheet and including an effective display region and a non-effective display region around the effective display region; and a light conversion/light-blocking sheet corresponding to the non-effective display region.Type: ApplicationFiled: November 5, 2012Publication date: October 30, 2014Applicant: LG INNOTEK CO., LTD.Inventors: So Yeon Kim, Seung Ryong Park
-
Patent number: 8872421Abstract: Certain embodiments provide a white LED for a backlight of a liquid crystal display device, which comprises an ultraviolet (or violet) light emitting element and a phosphor layer that contains a green phosphor selected from trivalent cerium- and terbium-activated rare earth borate phosphors, a blue phosphor selected from divalent europium-activated halophosphate phosphors and divalent europium-activated aluminate phosphors, and a red phosphor selected from europium-activated lanthanum oxysulfide phosphors and europium-activated yttrium oxysulfide phosphors as the contained amounts of the respective phosphors relative to the total amount of the phosphors as follows: 35-50% by weight of the green phosphor content; 50-70% by weight of the blue phosphor content; and 1-10% by weight of the red phosphor content.Type: GrantFiled: February 29, 2012Date of Patent: October 28, 2014Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Hajime Takeuchi, Ryo Sakai, Tsutomu Ishii, Yasumasa Ooya, Yasuhiro Shirakawa
-
Patent number: 8866375Abstract: A light-emitting diode component includes a primary source, a conversion layer forming a secondary source configured for absorbing the primary radiation at least in part and emitting a secondary radiation, an encapsulation layer, situated between the primary and secondary sources. The light-emitting diode component also includes a reflection layer (i) situated between the encapsulation layer and the conversion layer and having a face in contact with the encapsulation layer so as to form an interface with the encapsulation layer, the reflection layer (i) and the encapsulation layer being configured so that the interface allows the primary radiation originating from the primary source to pass and reflects the secondary radiation toward the outside of the light emitting diode.Type: GrantFiled: October 18, 2012Date of Patent: October 21, 2014Assignee: Commissariat a l' Energie Atomique et aux Energies AlternativesInventors: Adrien Gasse, Yohan Desieres, Francois Levy
-
Patent number: 8866374Abstract: A light emitting device includes a light emitting structure comprising a first conductivity type semiconductor layer, a second conductivity type semiconductor layer and an active layer disposed between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer to emit a light of a first wavelength; and a re-emission layer disposed on the light emitting structure, the re-emission layer comprising a nitride semiconductor, wherein the re-emission layer absorbs the light of the first wavelength range and the re-emission layer emits a light of a second wavelength range longer than the first wavelength range, and the re-emission layer is configured of multi layers having different indium (In) compositions, respectively, and the indium content in the multi-layer is largest in a top layer of the multi-layers.Type: GrantFiled: April 6, 2011Date of Patent: October 21, 2014Assignee: LG Innotek Co., Ltd.Inventor: Tae Yong Moon
-
Patent number: 8866373Abstract: A display device includes a display panel and a light emitting device to supply light to the display panel. The light emitting device includes a light emitting element emitting a first light and a fluorescent layer receiving the first light, transmitting a portion of the first light, converting a remaining portion of the first light to a second light having a wavelength range different from the first light, and emitting the second light. The second light emitted by the fluorescent layer has a full width at half maximum equal to or larger than 110 nanometers (nm) and a light emission spectrum having a peak wavelength within a wavelength range of about 530 nm to about 560 nm. The second light has a light emission intensity corresponding to 10 to 30 percent of a peak light emission intensity of the first light.Type: GrantFiled: August 17, 2010Date of Patent: October 21, 2014Assignee: Samsung Display Co., Ltd.Inventors: Dong Chin Lee, Gicherl Kim, Byungchoon Yang, Young-keun Lee, Seung Hwan Baek, So jin Ryu
-
Patent number: 8860299Abstract: An organic light-emitting display device and a method of manufacturing the same are presented. The organic light-emitting display device includes substrate; a display unit comprising a plurality of emission regions in which organic light-emitting devices are disposed, and a pixel-defining layer having openings defining the emission regions, the emission regions and the pixel-defining film being formed on the substrate; an encapsulation thin film that covers the display unit on the substrate and that comprises a plurality of stacked insulating layers; and a color film that is interposed between the insulating layers of the encapsulation thin film and that is formed to at least fill a concave portion corresponding to each of the openings.Type: GrantFiled: March 12, 2013Date of Patent: October 14, 2014Assignee: Samsung Display Co., Ltd.Inventor: Ju-Yeop Seong
-
Patent number: 8860301Abstract: A dimming method of an organic EL displaying apparatus having a displaying unit constructed by combining pixels each having a substrate, an organic EL element formed over the substrate, a power supply line for supplying a power source to the organic EL element, and at least one TFT provided on a wiring path from the power supply line to the organic EL element. The TFT has a semiconductor layer which is arranged between a source electrode and a drain electrode and is electrically connected to the source electrode and the drain electrode. A laser beam is irradiated from a downward direction of the substrate to a region which does not overlap a gate electrode, the source electrode, the drain electrode, and the wiring layer when seen as a plan view in a plane region where the semiconductor layer is provided.Type: GrantFiled: November 15, 2011Date of Patent: October 14, 2014Assignee: Canon Kabushiki KaishaInventors: Junya Tamaki, Takashi Moriyama, Nobuhiko Sato, Kaoru Okamoto, Yasushi Iwakura, Masahiro Fushimi