With Contoured External Surface (e.g., Dome Shape To Facilitate Light Emission) Patents (Class 257/95)
  • Patent number: 8350277
    Abstract: A light emitting element includes a semiconductor substrate, a light emitting part having a first and second conductivity type cladding layers and an active layer sandwiched between the cladding layers. A reflecting part is disposed between the substrate and the light emitting part. A current dispersing layer disposed on a side of the light emitting part opposite to the reflecting. The reflecting part has at least three pair layers of first and second semiconductor layers, the first semiconductor layer has a first thickness, the second semiconductor layer has a second thickness and a plurality of pair layers of the reflecting part have a different thickness to each other as values of the incident angle of light are different with respect to each pair layer. At least one pair layer is defined by the incident angle of light being not less than 50 degrees.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: January 8, 2013
    Assignee: Hitachi Cable, Ltd.
    Inventor: Taichiroo Konno
  • Patent number: 8350278
    Abstract: A nitride semiconductor light-emitting device includes an n type nitride semiconductor layer, a light-emitting layer formed on the n type nitride semiconductor layer, a first p type nitride semiconductor layer formed on the light-emitting layer, an intermediate layer formed on the first p type nitride semiconductor layer to alternately cover and expose a surface of the first p type nitride semiconductor layer, and a second p type nitride semiconductor layer formed on the intermediate layer. The intermediate layer is made of a compound containing Si and N as constituent elements.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: January 8, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Satoshi Komada
  • Patent number: 8350251
    Abstract: An opto-electric structure includes a plurality of nano elements arranged side by side on a support layer, where each nano element includes at least a first conductivity type semiconductor nano sized core, and where the core and a second conductivity type semiconductor form a pn or pin junction. A first electrode layer that extends over the plurality of nano elements and is in electrical contact with at least a portion of the second conductivity type semiconductor, and a mirror provided on a second conductivity type semiconductor side of the structure.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: January 8, 2013
    Assignee: GLO AB
    Inventors: Truls Lowgren, Ghulam Hasnain
  • Patent number: 8344397
    Abstract: A solid state light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED chips have top and bottom electrodes, where the bottom electrode is a large reflective electrode. The bottom electrodes of an array of LEDs (e.g., 500 LEDs) are bonded to an array of electrodes formed on a flexible bottom substrate. Conductive traces are formed on the bottom substrate connected to the electrodes. A transparent top substrate is then formed over the bottom substrate. Various ways to connect the LEDs in series are described along with many embodiments. In one method, the top substrate contains a conductor pattern that connects to LED electrodes and conductors on the bottom substrate.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: January 1, 2013
    Assignee: Quarkstar LLC
    Inventors: Louis Lerman, Allan Brent York, Michael David Henry, Robert Steele, Brian D. Ogonowsky
  • Patent number: 8344402
    Abstract: A semiconductor light emitting device including a substrate, an electrode and a light emitting region is provided. The substrate may have protruding portions formed in a repeating pattern on substantially an entire surface of the substrate while the rest of the surface may be substantially flat. The cross sections of the protruding portions taken along planes orthogonal to the surface of the substrate may be semi-circular in shape. The cross sections of the protruding portions may in alternative be convex in shape. A buffer layer and a GaN layer may be formed on the substrate.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: January 1, 2013
    Assignee: Nichia Corporation
    Inventors: Isamu Niki, Motokazu Yamada, Masahiko Sano, Shuji Shioji
  • Patent number: 8344403
    Abstract: A semiconductor light emitting device including a substrate, an electrode and a light emitting region is provided. The substrate may have protruding portions formed in a repeating pattern on substantially an entire surface of the substrate while the rest of the surface may be substantially flat. The cross sections of the protruding portions taken along planes orthogonal to the surface of the substrate may be semi-circular in shape. The cross sections of the protruding portions may in alternative be convex in shape. A buffer layer and a GaN layer may be formed on the substrate.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: January 1, 2013
    Assignee: Nichia Corporation
    Inventors: Isamu Niki, Motokazu Yamada, Masahiko Sano, Shuji Shioji
  • Patent number: 8344404
    Abstract: To provide a wavelength conversion member having good surface accuracy and dimensional accuracy even when processed in various shapes, and a method for manufacturing the same. A method for manufacturing a wavelength conversion member, including the steps of: subjecting a preform made of a powder mixture containing a glass powder and an inorganic phosphor powder to heat treatment, thereby obtaining a sintered powder product; and re-press molding the sintered powder product with a die.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: January 1, 2013
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Shunsuke Fujita, Yoshio Umayahara, Akihiko Sakamoto
  • Patent number: 8338839
    Abstract: A solid state light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED chips have top and bottom electrodes, where the bottom electrode is a large reflective electrode. The bottom electrodes of an array of LEDs (e.g., 500 LEDs) are bonded to an array of electrodes formed on a flexible bottom substrate. Conductive traces are formed on the bottom substrate connected to the electrodes. A transparent top substrate is then formed over the bottom substrate. Various ways to connect the LEDs in series are described along with many embodiments. In one method, the top substrate contains a conductor pattern that connects to LED electrodes and conductors on the bottom substrate.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: December 25, 2012
    Assignee: Quarkstar LLC
    Inventors: Louis Lerman, Allan Brent York, Michael David Henry, Robert Steele, Brian D. Ogonowsky
  • Patent number: 8338842
    Abstract: A solid state light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED chips have top and bottom electrodes, where the bottom electrode is a large reflective electrode. The bottom electrodes of an array of LEDs (e.g., 500 LEDs) are bonded to an array of electrodes formed on a flexible bottom substrate. Conductive traces are formed on the bottom substrate connected to the electrodes. A transparent top substrate is then formed over the bottom substrate. Various ways to connect the LEDs in series are described along with many embodiments. In one method, the top substrate contains a conductor pattern that connects to LED electrodes and conductors on the bottom substrate.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: December 25, 2012
    Assignee: Quarkstar LLC
    Inventors: Louis Lerman, Allan Brent York, Michael David Henry, Robert Steele, Brian D. Ogonowsky
  • Patent number: 8338841
    Abstract: A solid state light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED chips have top and bottom electrodes, where the bottom electrode is a large reflective electrode. The bottom electrodes of an array of LEDs (e.g., 500 LEDs) are bonded to an array of electrodes formed on a flexible bottom substrate. Conductive traces are formed on the bottom substrate connected to the electrodes. A transparent top substrate is then formed over the bottom substrate. Various ways to connect the LEDs in series are described along with many embodiments. In one method, the top substrate contains a conductor pattern that connects to LED electrodes and conductors on the bottom substrate.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: December 25, 2012
    Assignee: Quarkstar LLC
    Inventors: Louis Lerman, Allan Brent York, Michael David Henry, Robert Steele, Brian D. Ogonowsky
  • Patent number: 8338840
    Abstract: A solid state light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED chips have top and bottom electrodes, where the bottom electrode is a large reflective electrode. The bottom electrodes of an array of LEDs (e.g., 500 LEDs) are bonded to an array of electrodes formed on a flexible bottom substrate. Conductive traces are formed on the bottom substrate connected to the electrodes. A transparent top substrate is then formed over the bottom substrate. Various ways to connect the LEDs in series are described along with many embodiments. In one method, the top substrate contains a conductor pattern that connects to LED electrodes and conductors on the bottom substrate.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: December 25, 2012
    Assignee: Quarkstar LLC
    Inventors: Louis Lerman, Allan Brent York, Michael David Henry, Robert Steele, Brian D. Ogonowsky
  • Patent number: 8330183
    Abstract: The light emitting element includes a substrate; a first block pattern formed on the substrate; a light emitter including a first semiconductor pattern of a first conductivity type, a light emitting pattern, and a second semiconductor pattern of a second conductivity type, sequentially stacked on the substrate having the first block pattern formed thereon, the light emitter having a first portion formed on the first block pattern, and a second portion formed between two adjacent first block patterns, the second portion formed lower than the first portion to define a recessed region, and a second block pattern formed on the light emitter to fill the recessed region.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: December 11, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Yu-Sik Kim
  • Patent number: 8330173
    Abstract: Disclosed are a nanostructure with an indium gallium nitride quantum well and a light emitting diode employing the same. The light emitting diode comprises a substrate, a transparent electrode and an array of nanostructures interposed between the substrate and the transparent electrode. Each of the nanostructures comprises a core nanorod, and a nano shell surrounding the core nanorod. The core nanorod is formed substantially perpendicularly to the substrate and includes a first nanorod of a first conductivity type, an (AlxInyGa1-x-y)N (where, 0?x<1, 0?y?1 and 0?x+y?1) quantum well, and a second nanorod of a second conductivity type, which are joined in a longitudinal direction. The nano shell is formed of a material with a bandgap greater than that of the quantum well, and surrounds at least the quantum well of the core nanorod. Meanwhile, the second nanorods are connected in common to the transparent electrode.
    Type: Grant
    Filed: June 25, 2005
    Date of Patent: December 11, 2012
    Assignee: Seoul Opto Device Co., Ltd.
    Inventor: Hwa Mok Kim
  • Patent number: 8314434
    Abstract: A light emitting diode module includes a substrate, at least two spaced apart light emitting diodes formed on the substrate, an insulating layer, and an electrically conductive layer. Each of the light emitting diodes includes a light emitting unit, an n-electrode, and a p-electrode. The light emitting unit has first and second portions. The first portion has an n-type top face and a first stepped side. The second portion has a p-type top face and a second stepped side. The insulating layer is formed on the n-type top face and the first stepped side of the first portion of one of the light emitting diodes, and the second stepped side and the p-type top face of the second portion of the other one of the light emitting diodes. The electrically conductive layer is formed on the insulating layer. A method of making the light emitting diode module is also disclosed.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: November 20, 2012
    Assignee: Ubilux Optoelectronics Corporation
    Inventors: Chih-Sheng Lin, Shun-Hong Zheng
  • Patent number: 8314327
    Abstract: Novel structures of photovoltaic cells (also treated as solar cells) are provided. The cells are based on nanometer-scaled wires, tubes, and/or rods, which are made of electronic materials covering semiconductors, insulators or metallic in structure. These photovoltaic cells have large power generation capability per unit physical area over the conventional cells. These cells will have enormous applications in space, commercial, residential, and industrial applications.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: November 20, 2012
    Assignee: Banpil Photonics, Inc.
    Inventor: Achyut Kumar Dutta
  • Patent number: 8314437
    Abstract: Certain embodiments provide a method for manufacturing a semiconductor light emitting device, including: providing a first stack film on a first substrate, the first stack film being formed by stacking a p-type nitride semiconductor layer, an active layer having a multiquantum well structure of a nitride semiconductor, and an n-type nitride semiconductor layer in this order; forming an n-electrode on an upper face of the n-type nitride semiconductor layer; and forming a concave-convex region on the upper face of the n-type nitride semiconductor layer by performing wet etching on the upper face of the n-type nitride semiconductor layer with the use of an alkaline solution, except for a region in which the n-electrode is formed.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: November 20, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kotaro Zaima, Toru Gotoda, Toshiyuki Oka, Shinya Nunoue
  • Patent number: 8314441
    Abstract: An optoelectronic component having a basic housing or frame and at least one semiconductor chip, specifically a radiation-emitting or -receiving semiconductor chip, in a cavity of the basic housing. In order to increase the efficiency of the optoelectronic component, reflectors are provided in the cavity in the region around the semiconductor chip. These reflectors are formed by virtue of the fact that a filling compound filled at least partly into the cavity is provided, the material and the quantity of the filling compound being chosen in such a way that the filling compound, on account of the adhesion force between the filling compound and the basic housing, assumes a form which widens essentially conically from bottom to top in the cavity, and the conical inner areas of the filling compound serve as reflector.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: November 20, 2012
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventors: Marcus Ruhnau, Bert Braune, Patrick Kromotis, Georg Bogner
  • Patent number: 8309981
    Abstract: An LED module having an LED semiconductor chip mounted directly or indirectly on a platform. The platform is made from silicon and is extends laterally beyond the LED semiconductor chip having an active light emitting layer and a substrate. At least one electronic component that is part of the control circuitry for the LED semiconductor chip is integrated in the silicon platform.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: November 13, 2012
    Assignee: Ledon Lighting Jennersdorf GmbH
    Inventors: Christian Sommer, Franz-Peter Wenzl, Peter Pachler, Paul Hartmann
  • Patent number: 8309843
    Abstract: Novel structures of photovoltaic cells (also treated as solar cells) are provided. The Cells are based on the nanometer-scaled wire, tubes, and/or rods, which are made of the electronics materials covering semiconductors, insulator or metallic in structure. These photovoltaic cells have large power generation capability per unit physical area over the conventional cells. These cells can have also high radiation tolerant capability. These cells will have enormous applications such as in space, in commercial, residential and industrial applications.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: November 13, 2012
    Assignee: Banpil Photonics, Inc.
    Inventors: Nobuhiko P. Kobayashi, Achyut K. Dutta
  • Patent number: 8304793
    Abstract: A III-nitride semiconductor optical device has a support base comprised of a III-nitride semiconductor, an n-type gallium nitride based semiconductor layer, a p-type gallium nitride based semiconductor layer, and an active layer. The support base has a primary surface at an angle with respect to a reference plane perpendicular to a reference axis extending in a c-axis direction of the III-nitride semiconductor. The n-type gallium nitride based semiconductor layer is provided over the primary surface of the support base. The p-type gallium nitride based semiconductor layer is doped with magnesium and is provided over the primary surface of the support base. The active layer is provided between the n-type gallium nitride based semiconductor layer and the p-type gallium nitride based semiconductor layer over the primary surface of the support base. The angle is in the range of not less than 40° and not more than 140°. The primary surface demonstrates either one of semipolar nature and nonpolar nature.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: November 6, 2012
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yusuke Yoshizumi, Yohei Enya, Katsushi Akita, Masaki Ueno, Takashi Kyono, Takao Nakamura
  • Patent number: 8304794
    Abstract: A light emitting device includes a substrate having a first surface and a second surface not parallel to the first surface, and a light emission layer disposed over the second surface to emit light. The light emission layer has a light emission surface which is not parallel to the first surface.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: November 6, 2012
    Assignee: SiPhoton Inc.
    Inventor: Shaoher X. Pan
  • Patent number: 8304803
    Abstract: A light-emitting diode includes an n-type nitride semiconductor layer, a multiple quantum well, a p-type nitride semiconductor layer, a window electrode layer, a p-side electrode, and an n-side electrode, which are stacked in this order. The window electrode layer comprises an n-type single-crystalline ITO transparent film and an n-type single-crystalline ZnO transparent film. The p-type nitride semiconductor layer is in contact with the n-type single-crystalline ITO transparent film, the n-type single-crystalline ITO transparent film is in contact with the n-type single-crystalline ZnO transparent film, and the p-side electrode is in connected with the n-type single-crystalline ZnO transparent film. The n-type single-crystalline ITO transparent film contains Ga, a molar ratio of Ga/(In+Ga) being not less than 0.08 and not more than 0.5. Thickness of the n-type single-crystalline ITO transparent film is not less than 1.1 nm and not more than 55 nm.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: November 6, 2012
    Assignee: Panasonic Corporation
    Inventors: Hiroyuki Tanaka, Nobuaki Nagao, Takahiro Hamada, Eiji Fujii
  • Patent number: 8299486
    Abstract: A semiconductor light emitting device including a substrate, an electrode and a light emitting region is provided. The substrate may have protruding portions formed in a repeating pattern on substantially an entire surface of the substrate while the rest of the surface may be substantially flat. The cross sections of the protruding portions taken along planes orthogonal to the surface of the substrate may be semi-circular in shape. The cross sections of the protruding portions may in alternative be convex in shape. A buffer layer and a GaN layer may be formed on the substrate.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: October 30, 2012
    Assignee: Nichia Corporation
    Inventors: Isamu Niki, Motokazu Yamada, Masahiko Sano, Shuji Shioji
  • Patent number: 8294166
    Abstract: A transparent light emitting diode (LED) includes a plurality of III-nitride layers, including an active region that emits light, wherein all of the layers except for the active region are transparent for an emission wavelength of the light, such that the light is extracted effectively through all of the layers and in multiple directions through the layers. Moreover, the surface of one or more of the III-nitride layers may be roughened, textured, patterned or shaped to enhance light extraction.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: October 23, 2012
    Assignee: The Regents of the University of California
    Inventors: Shuji Nakamura, Steven P. DenBaars, Hirokuni Asamizu
  • Patent number: 8294163
    Abstract: An optoelectronic component with three-dimension quantum well structure and a method for producing the same are provided, wherein the optoelectronic component comprises a substrate, a first semiconductor layer, a transition layer, and a quantum well structure. The first semiconductor layer is disposed on the substrate. The transition layer is grown on the first semiconductor layer, contains a first nitride compound semiconductor material, and has at least a texture, wherein the texture has at least a first protrusion with at least an inclined facet, at least a first trench with at least an inclined facet and at least a shoulder facet connected between the inclined facets. The quantum well structure is grown on the texture and shaped by the protrusion, the trench and the shoulder facet.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: October 23, 2012
    Assignee: Hermes-Epitek Corp.
    Inventors: Benson Chao, Chung-Hua Fu, Shih-Chieh Jang
  • Patent number: 8294177
    Abstract: A light emitting device (1) includes a LED chip (10) as well as a mounting substrate (20) on which the LED chip (10) is mounted. Further, the light emitting device (1) includes a cover member (60) and a color conversion layer (70). The cover member (60) is formed to have a dome shape and is made of a translucency inorganic material. The color conversion layer (70) is formed to have a dome shape and is made of a translucency material (such as, a silicone resin) including a fluorescent material excited by light emitted from the LED chip (10) and emitting light longer in wavelength than the light emitted from the LED chip (10). The cover member (60) is attached to the mounting substrate (20) such that there is an air layer (80) between the cover member (60) and the mounting substrate (20). The color conversion layer (70) is superposed on a light-incoming surface or a light-outgoing surface of the cover member (60).
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: October 23, 2012
    Assignee: Panasonic Corporation
    Inventors: Keiichi Yamazaki, Naoko Takei, Tomoyuki Nakajima
  • Patent number: 8288777
    Abstract: An LED package structure for increasing heat-dissipating and light-emitting efficiency includes a substrate unit, an alloy unit, a light-emitting unit, a conductive unit and a package unit. The substrate unit has a substrate body, a first conductive pad, a second conductive pad and a chip-placing pad. The alloy unit has a Ni/Pd alloy formed on the chip-placing pad. The light-emitting unit has an LED chip positioned on the Ni/Pd alloy of the alloy unit by solidified solder ball or glue. The conductive unit has two conductive wires, and the LED chip is electrically connected to the first conductive pad and the second conductive pad by the two conductive wires, respectively. The package unit has a light-transmitting package gel body formed on the top surface of the substrate body in order to cover the light-emitting unit and the conductive unit.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: October 16, 2012
    Assignee: Paragon Semiconductor Lighting Technology Co., Ltd.
    Inventors: Hsin-Yuan Peng, Shen-Ta Yang, Chia-Tin Chung
  • Patent number: 8283683
    Abstract: A light emitting diode chip includes a permanent substrate having a holding space formed on the permanent substrate; an insulating layer and a metal layer sequentially formed on the permanent substrate and the holding spacer; a die having a eutectic layer and a light-emitting region and bonded to the metal layer within the holding space via the eutectic layer coupling to the metal layer; a filler structure filled between the holding space and the die; and an electrode formed on the die and in contact with the light-emitting region.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: October 9, 2012
    Assignee: Opto Tech Corporation
    Inventors: Chang-Da Tsai, Wei-Che Wu, Chia-Liang Hsu, Ching-Shih Ma
  • Patent number: 8278672
    Abstract: A semiconductor light-emitting device is disclosed. The semiconductor light-emitting device comprises a multilayer epitaxial structure disposed on a semiconductor substrate. The semiconductor substrate has a predetermined lattice direction perpendicular to an upper surface thereof, wherein the predetermined lattice direction is angled toward [0 11] or [01 1] from [100], or toward [011] or [0 11] from [ 100] so that the upper surface of the semiconductor substrate comprises at least two lattice planes with different lattice plane directions. The multilayer epitaxial structure has a roughened upper surface perpendicular to the predetermined lattice direction. The invention also discloses a method for fabricating a semiconductor light-emitting device.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: October 2, 2012
    Assignee: Epistar Corporation
    Inventors: Ya-Ju Lee, Ta-Cheng Hsu, Ming-Ta Chin, Yen-Wen Chen, Wu-Tsung Lo, Chung-Yuan Li, Min-Hsun Hsieh
  • Patent number: 8278673
    Abstract: A light emitting diode comprises a heat conductive layer, a semiconductor layer disposed above the heat conductive substrate and consisting of a p-type semiconductor layer, an active layer and an n-type semiconductor layer, a transparent electrode layer, a current blocking layer and an electrode contact pad. The p-type semiconductor layer has first concaves located on its surface distant from the active layer. The n-type semiconductor layer has second concaves located on its surface distant from the active layer. The transparent electrode layer is located on the surface of the n-type semiconductor layer except the second concaves. The current blocking layer is located in the first concaves of the p-type semiconductor layer. The electrode contact pad is located on the surface of the transparent electrode layer. The density of the second concaves decrease with distance from the electrode contact pad.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: October 2, 2012
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chih-Chen Lai
  • Patent number: 8274092
    Abstract: This invention provides an optoelectronic semiconductor device having a rough surface and the manufacturing method thereof. The optoelectronic semiconductor device comprises a semiconductor stack having a rough surface and an electrode layer overlaying the semiconductor stack. The rough surface comprises a first region having a first topography and a second region having a second topography. The method comprises the steps of forming a semiconductor stack on a substrate, forming an electrode layer on the semiconductor stack, thermal treating the semiconductor stack, and wet etching the surface of the semiconductor stack to form a rough surface.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: September 25, 2012
    Assignee: Epistar Corporation
    Inventors: Chiu-Lin Yao, To-Cheng Hsu
  • Patent number: 8269233
    Abstract: This application related to an opto-electrical device, comprising a first ACLED having a first n-type semiconductor layer, a first light emitting layer, a first p-type semiconductor layer, a first p-type electrode and a first n-type electrode; a second ACLED having a second n-type semiconductor layer, a second light emitting layer, a second p-type semiconductor layer, a second p-type electrode and a second n-type electrode, wherein each of the first ACLED and the second ACLED are vertical stack structure and is connected in anti-parallel manner.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: September 18, 2012
    Assignee: Epistar Corporation
    Inventors: Wei-Yo Chen, Yen-Wen Chen, Shu-Ting Hsu, Tsung Xian Lee
  • Patent number: 8258529
    Abstract: A light-emitting element includes a semiconductor substrate, a light emitting portion including an active layer sandwiched between a first cladding layer of a first conductivity type and a second cladding layer of a second conductivity type different from the first conductivity type, a reflective portion provided between the semiconductor substrate and the light emitting portion for reflecting light emitted from the active layer, and a current spreading layer provided on the light emitting portion opposite to the reflective portion and including a concavo-convex portion on a surface thereof. The reflective portion includes a plurality of pair layers each including a first semiconductor layer and a second semiconductor layer different from the first semiconductor layer, and the first semiconductor layer has a thickness TA1 defined by formulas (1) and (3), and the second semiconductor layer has a thickness TB1 defined by formulas (2) and (4).
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: September 4, 2012
    Assignee: Hitachi Cable, Ltd.
    Inventors: Taichiroo Konno, Nobuaki Kitano
  • Patent number: 8258524
    Abstract: A light emitting diode device which includes at least one light emitting diode, a heat-sink chassis having a surface upon which the at least one light emitting diode is mounted, and a waveguide having one end coupled to the at least one light emitting diode for receiving light therefrom. The waveguide has another end which includes a light extraction and redistribution region, and the waveguide is configured to guide light received from the at least one light emitting diode away from the heat-sink chassis and towards the light extraction and redistribution region. The light extraction and redistribution region is configured to extract and redistribute the light from the waveguide.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: September 4, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Wei-Sin Tan, Valerie Berryman-Bousquet, Tong Zhang, Jonathan Heffernan
  • Patent number: 8253146
    Abstract: An LED die includes a multi-layer semiconductor with a first surface, a second surface opposite to the first surface, an inclined plane connecting to the first surface and the second surface, a first electrode and a second electrode respectively positioned on the first surface and the second surface, a first heat dissipation layer made of electrically-insulating and thermally conductive material being coated on the first surface and the inclined plane with a first opening exposing the first electrode, and a second heat dissipation layer made of electrically and thermally conductive material being coated on the first heat dissipation layer and contacting and electrically connecting with the first electrode.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: August 28, 2012
    Assignee: Advanced Optoelectronic Technology, Inc.
    Inventors: Tzu-Chien Hung, Chia-Hui Shen, Chih-Pang Ma
  • Patent number: 8253154
    Abstract: A lens for a light emitting diode package and a light emitting diode package having the same have simple structures and increase light extraction efficiency by preventing light emitted from a light emitting diode chip from being internally reflected by a lens surface through a structural change in the lens surface.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: August 28, 2012
    Assignee: Samsung Led Co., Ltd.
    Inventors: Soo Jin Jung, Joong Kon Son, Gwan Su Lee
  • Patent number: 8247791
    Abstract: A compound semiconductor light emitting element is provided with a substrate which is provided on a side of one electrode; a plurality of columnar crystal structures of nanometer scale extending in a vertical direction on the substrate; and another electrode which interconnects top portions of the plurality of columnar crystal structures. On the substrate are provided a first region, and a second region having a step between the first region and the second region and having a substrate thickness greater than that in the first region; a porous first mask layer is formed on the surface of the first region on the substrate; and the plurality of columnar crystal structures are formed by sequentially layering an n-type semiconductor layer, a light emitting layer, and a p-type semiconductor layer, in the first and second regions on the substrate.
    Type: Grant
    Filed: May 25, 2009
    Date of Patent: August 21, 2012
    Assignee: Panasonic Corporation
    Inventor: Robert David Armitage
  • Publication number: 20120205691
    Abstract: A device includes a semiconductor structure comprising a III-nitride light emitting layer disposed between an n-type region and a p-type region and a plurality of layer pairs disposed within one of the n-type region and the p-type region. Each layer pair includes an InGaN layer and pit-filling layer in direct contact with the InGaN layer. The pit-filling layer may fill in pits formed in the InGaN layer.
    Type: Application
    Filed: April 17, 2012
    Publication date: August 16, 2012
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Sungsoo Yi, Nathan F. Gardner, Qi Laura Ye
  • Patent number: 8242521
    Abstract: Structures are incorporated into a semiconductor light emitting device which may increase the extraction of light emitted at glancing incidence angles. In some embodiments, the device includes a low index material that directs light away from the metal contacts by total internal reflection. In some embodiments, the device includes extraction features such as cavities in the semiconductor structure which may extract glancing angle light directly, or direct the glancing angle light into smaller incidence angles which are more easily extracted from the device.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: August 14, 2012
    Assignees: Koninklijke Philips Electronics N.V., Philips Lumileds Lighting Company LLC
    Inventors: Aurelien J. F. David, Henry Kwong-Hin Choy, Jonathan J. Wierer, Jr.
  • Patent number: 8242483
    Abstract: A method for manufacturing a semiconductor light emitting device, which is capable of providing high characteristic homogeneity and reproducibility, is disclosed. The disclosed method includes forming a buffer layer over a substrate, selectively growing a nitride crystal layer on the buffer layer, forming a nitride semiconductor layer having a multilayer structure over the nitride crystal layer, forming a first electrode on the nitride semiconductor layer, attaching an auxiliary substrate to the first electrode, separating the substrate from the nitride crystal layer, forming a second electrode on the nitride crystal layer exposed in accordance with the separation of the substrate, and removing the auxiliary substrate from the first electrode.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: August 14, 2012
    Assignee: LG Electronics Inc.
    Inventors: Min Soo Noh, Hyun Chul Ko
  • Patent number: 8242518
    Abstract: A solid state light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED chips have top and bottom electrodes, where the bottom electrode is a large reflective electrode. The bottom electrodes of an array of LEDs (e.g., 500 LEDs) are bonded to an array of electrodes formed on a flexible bottom substrate. Conductive traces are formed on the bottom substrate connected to the electrodes. A transparent top substrate is then formed over the bottom substrate. Various ways to connect the LEDs in series are described along with many embodiments. In one method, the top substrate contains a conductor pattern that connects to LED electrodes and conductors on the bottom substrate.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: August 14, 2012
    Assignee: Quarkstar LLC
    Inventors: Louis Lerman, Allan Brent York, Michael David Henry, Robert Steele, Brian D. Ogonowsky
  • Patent number: 8241937
    Abstract: An optical semiconductor device includes a light emitting element having a first surface and a second surface, the first surface having a first electrode provided thereon, the second surface being located on the opposite side from the first surface and having a second electrode provided thereon; a first conductive member connected to the first surface; a second conductive member connected to the second surface; a first external electrode connected to the first conductive member; a second external electrode connected to the second conductive member; and an enclosure sealing the light emitting element, the first conductive member, and the second conductive member between the first external electrode and the second external electrode, and being configured to transmit light emitted from the light emitting element.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: August 14, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akihiko Happoya, Kazuhito Higuchi, Tomohiro Iguchi, Kazuo Shimokawa, Takashi Koyanagawa, Michinobu Inoue, Izuru Komatsu, Hisashi Ito
  • Patent number: 8237180
    Abstract: A light emitting element includes a semiconductor laminated structure including a first semiconductor layer of first conductivity type, a second semiconductor layer of second conductivity type different from the first conductivity type, and an active layer sandwiched between the first semiconductor layer and the second semiconductor layer, a surface electrode including a center electrode disposed on one surface of the semiconductor laminated structure and a thin wire electrode extending from a periphery of the center electrode, and a contact part disposed on a part of another surface of the semiconductor laminated structure extruding a part located directly below the surface electrode, in parallel along the thin wire electrode, and including a plurality of first regions forming the shortest current pathway between the thin wire electrode and a second region allowing the plural first regions to be connected.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: August 7, 2012
    Assignee: Hitachi Cable, Ltd.
    Inventors: Kazuyuki Iizuka, Masahiro Arai
  • Patent number: 8232570
    Abstract: Provided are a semiconductor light emitting device and a method of manufacturing the same. The semiconductor light emitting device comprises a p-type substrate, a p-type semiconductor layer, an active layer, and an n-type semiconductor layer. The p-type semiconductor layer is formed on the p-type substrate. The active layer is formed on the p-type semiconductor layer. The n-type semiconductor layer is formed on the active layer.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: July 31, 2012
    Assignee: LG Innotek Co., Ltd.
    Inventor: Kyung Jun Kim
  • Patent number: 8227820
    Abstract: A semiconductor light-emitting diode, and method of fabricating same, wherein an indium (In)-containing light-emitting layer, as well as subsequent device layers, is deposited on a textured surface. The resulting device is a phosphor-free white light source.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: July 24, 2012
    Assignee: The Regents of the University of California
    Inventors: Rajat Sharma, Paul Morgan Pattison, John Francis Kaeding, Shuji Nakamura
  • Patent number: 8227280
    Abstract: A semiconductor light emitting device including a substrate, an electrode and a light emitting region is provided. The substrate may have protruding portions formed in a repeating pattern on substantially an entire surface of the substrate while the rest of the surface may be substantially flat. The cross sections of the protruding portions taken along planes orthogonal to the surface of the substrate may be semi-circular in shape. The cross sections of the protruding portions may in alternative be convex in shape. A buffer layer and a GaN layer may be formed on the substrate.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: July 24, 2012
    Assignee: Nichia Corporation
    Inventors: Isamu Niki, Motokazu Yamada, Masahiko Sano, Shuji Shioji
  • Patent number: 8227823
    Abstract: The semiconductor light-emitting structure has a plurality of compound semiconductor layers; a current spreading layer comprising a multi-layered transparent electrode layer on the plurality of compound semiconductor layers and a metal layer between the transparent electrode layers; and a second electrode electrically connected to the current spreading layer.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: July 24, 2012
    Assignee: LG Innotek Co., Ltd.
    Inventor: Jung Hyeok Bae
  • Patent number: 8217409
    Abstract: Surface-textured encapsulations for use with light emitting diodes. In an aspect, a light emitting diode apparatus is provided that includes a light emitting diode, and an encapsulation formed upon the light emitting diode and having a surface texture configured to extract light. In an aspect, a method includes encapsulating a light emitting diode with an encapsulation having a surface texture configured to extract light. In an aspect, a light emitting diode lamp is provided that includes a package, at least one light emitting diode disposed within the package, and an encapsulation formed upon the at least one light emitting diode having a surface texture configured to extract light. In another aspect, a method includes determining one or more regions of an encapsulation, the encapsulation configured to cover a light emitting diode, and surface-texturing each region of the encapsulation with one or more geometric features that are configured to extract light.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: July 10, 2012
    Assignee: Bridgelux, Inc.
    Inventor: Tao Xu
  • Patent number: 8217408
    Abstract: A semiconductor light emitting device includes: a conductive substrate; a semiconductor light emitting layer which includes a first semiconductor layer formed on one surface of the conductive substrate and having a first conductivity type, and a second semiconductor layer formed on the first semiconductor layer and having a second conductivity type opposite to the first conductivity type; first light emitting spots which are alternately arranged around a periphery of the semiconductor light emitting layer and emitting light to an exterior from the semiconductor light emitting layer; second light emitting spots having surfaces intersecting with the first light emitting spots and emitting light at an amount smaller than an amount of light emitted via the first light emitting spots; and wirings arranged along the second light emitting spots and electrically short circuiting an area between the first light emitting layer and the surfaces of the conductive substrate.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: July 10, 2012
    Assignee: Sanken Electric Co., Ltd.
    Inventor: Tetsuji Matsuo
  • Patent number: 8217402
    Abstract: Light-emitting devices and associated methods are provided. The light emitting devices can have a wavelength converting material-coated emission surface.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: July 10, 2012
    Assignee: Luminus Devices, Inc.
    Inventor: Nikolay I. Nemchuk