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Intellectual Property
Nitride based LED with a p-type injection region
August 20, 2007
An LED chip (2) is composed of a p-GaN layer (10), an n-GaN layer (14), and an MQW emission layer (12) that is sandwiched between the GaN layers (10 and 14). Each layer is made of a GaN semiconductor. Light exits the LED chip (2) through the n-GaN layer (14). A p-electrode (16) of the LED chip (2) has a surface profile (24B) defined by a plurality of columnar projections (24A) formed in a uniformly distributed relation on the surface facing toward the p-GaN layer (10). The p-electrode (16) is in contact with the p-GaN layer (10) at the top surface of each projection (24A). |
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Seoul Semiconductor Wins Patent Case in Taiwan
August 13, 2007
Seoul Semiconductor (KOSDAQ: 046890), one of the ten largest LED manufacturers in the world, announced today that a Taiwan Intellectual Property Office has ruled that the invalidation action brought by Advanced Optoelectronic Technology Inc.(AOT) against Seoul Semiconductor s white LED patent in Taiwan is not sustained. |
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Flip-chip light emitting diode with high light-emitting efficiency
August 13, 2007
A flip-chip light emitting diode with high light-emitting efficiency is disclosed. The LED includes a transparent conductive layer, an oxide layer, a reflective metal layer, a conductive layer, and a protective diffusion layer sequentially disposed over a p-type semiconductor layer. Thereby, light emitting from a light-emitting layer toward the p-type semiconductor layer is reflected and penetrating a transparent substrate and emitting outwards. Thus the problem of light shielded from the flip-chip type LED is solved and the light-emitting efficiency is improved. Furthermore, the present invention disposes the LED chip in a face-down orientation on a conductive substrate by flip-chip technology so as to enhance heat-dissipation efficiency of the LED. |
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Packages for semiconductor LEDs utilizing dispensed reflectors and methods of forming the same
August 06, 2007
A packaged LED includes a substrate, an LED chip on the upper surface of the substrate, a first encapsulant material, including a reflective material, on the substrate and spaced apart from the LED chip, and a second encapsulant material on the LED chip. A method of forming a packaged LED includes forming a first meniscus control feature on a substrate and defining a first region of the substrate, forming a second meniscus control feature surrounding the first region and defining a second region of the substrate between the first meniscus control feature and the second meniscus control feature, mounting an LED chip within the first region, dispensing a first encapsulant material including a reflective material within the second region, curing the first encapsulant material, dispensing a second encapsulant material on the substrate within the first region, and curing the second encapsulant material. |
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Color sensor integrated light emitting diode for LED backlight
August 03, 2007
A color sensor integrated light emitting diode (LED) is packaged with LED and color sensor mounted side by side inside LED package comprising a heat sink for mounting LED and the color sensor, both the color sensor and LED being buried by a high refractive index polymer followed by a diffuser layer and light extraction layer, all of which are transparent. Posts electrically linked to LED and color sensor inside the package are provided for external connection to LED and color sensor. Plurality of color sensors and LEDs can be packaged inside a single package with proper orientation of desired color LEDs to receive desired color by color sensors. Color change at the very source of light emission can be controlled with color sensor integrated LED package more effectively than conventional methods. Plurality of these packages can be employed for LED backlight for LCD, consumer lighting, decorative lighting and signage displays. |
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Color LED driver
August 01, 2007
Disclosed herein is a color LED driver, which is capable of being implemented by a compact structure without a feedback structure and accompanying a small size and low cost, by directly connecting a negative temperature coefficient (NTC) thermistor to a driving current path of a color LED applied to an LCD backlight to compensate a characteristic variation of the LED due to a variation in a temperature. The color LED driver includes a driving constant voltage source 100 which supplies a predetermined driving constant voltage VD; a driving circuit 200 which converts the driving constant voltage VD of the driving constant voltage source 100 into a plurality of driving currents, for driving color LEDs, the plurality of driving currents including red LED driving current Ird, green LED driving current Igd and blue LED driving current Ibd; a temperature compensation unit 300 which compensates variations in the red LED driving current Ird and the green LED driving current Igd due to a variation in a temperature, among the plurality of driving currents from the driving circuit 200; and an LED unit 400 including a plurality of color LEDs which are turned on by the driving currents from the temperature compensation circuit 300 and the driving current from the driving circuit 200. |
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Integrated led chip to emit multiple colors and method of manufacturing the same
August 01, 2007
The present invention is a monolithic, multi-colored LED chip and a method for making the same. The LED chip is comprised of a substrate and a plurality of light emitting structures, each light emitting structure capable of emitting a wavelength of light unique compared to others and each structure layered on top of another structure and separated by a dielectric layer. The light emitting structures are then capable of independent or tandem activation, yielding the original colors of each section, blends of colors, and white light. The method starts with the base for such a chip and etches layers of the chip away, leaving exposed sections, to reach electrical contact layers for each light emitting structure. Electrically conductive material is then used to fill the exposed sections and is, in turn, etched away to leave contacts. An insulating material is then used to fill in the resultant areas. |
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Settlement of Patent Litigation with OSRAM
July 20, 2007
Citizen Electronics Co., Ltd. with headquarters in Fujiyoshida-city, Yamanashi, Japan and President, Takashi Masuzawa (“CITIZEN ELECTRONICS”), a totally-held subsidiary of Citizen Holdings Co., Ltd. with headquarters in Nishi-Tokyo city, Tokyo, Japan and President Makoto Umehara, reached a settlement with Osram GmbH Munich, Germany and its subsidiary OSRAM Opto Semiconductors GmbH Regensburg, Germany (collectively “OSRAM”) over patent lawsuit and litigation cases that have been running since 2005, and concluded a settlement agreement on July 13, 2007. |
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Nexxus Lighting Issued Two New LED Lighting Technology Patents
July 20, 2007
Nexxus Lighting, Inc. (NASDAQ Capital Market: NEXS) a world leader in advanced lighting technology, including solid-state LED and fiber optic lighting systems and controls used in commercial, architectural, signage, swimming pool and retail lighting today announced that it has been issued two new patents related to its LED lighting technology. |
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Philips Lumileds Initiates Notification of Epistar Infringement and ITC Exclusion Order to Chip Packagers and Users of Epistar`s OMA, MB, and GB LED Products
July 13, 2007
Philips Lumileds is notifying chip packagers, distributors and others using Epistar`s OMA, MB and GB LEDs that the U.S. International Trade Commission (ITC) has issued an order excluding importation of these products into the United States because they infringe Philips Lumileds` patent rights. The exclusion order prohibits importation of Epistar`s infringing LEDs as well as packaged LEDs containing the infringing LEDs and boards primarily consisting of arrays of such packaged LEDs. The Presidential Review period has ended and the ITC`s Exclusion Order is now final and in full force. |
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LED drive circuit having temperature compensation
July 09, 2007
A LED driver circuit is provided for controlling the brightness of a LED. A control circuit is used for generating a LED current in accordance with a resistor. The control circuit is further coupled to detect a LED voltage for adjusting the LED current in reference to the LED voltage. The value of the LED voltage is correlated to the LED temperature. Therefore, the LED current is then programmed in accordance with the LED temperature. |
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Three wavelength led structure
May 22, 2007
A three wavelength light emitting diode (LED) structure utilizes a blue light LED chip and a green light LED chip as light sources, and a red fluorescent layer is used as a light transition layer. By adjusting the number of the blue light LED chip and the green light LED chip and the dosage of the chemical substances in the red fluorescent layer, the present invention can produce a white light LED which is adjustable in color temperature, a neutral color LED whose color is changeable, or can produce a LED whose light color changes with time. |
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LED Lighting Fixtures Receives First Patent
May 11, 2007
Morrisville, NC, May 11, 2007 - LED Lighting Fixtures, Inc. (LLF) today announced that the U.S. Patent Office has issued LLF’s first patent # 7,213,940. The ‘940 patent titled Lighting Device and Lighting Method, covers a unique approach for LEDs to create white light. The LED industry typically produces white light by either coating true blue LEDs with a YAG phosphor or combining red, green and blue LEDs. LLF uses a new and distinctive approach described in the ‘940 patent to deliver the high efficacy and excellent color quality found in all of LLF’s products. |
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Led with light transmissive heat sink
Apr 18, 2007
An more efficient or higher luminance LED assembly may be formed from a high power LED chip having a first surface, and a second surface, the first surface being mounted to a substrate; the second surface being in intimate thermal contact with a light transmissive heat sink having a thermal conductivity greater than 30 watts per meter-Kelvin. The LED chip is otherwise in electrical contact with at least a first electrical connection and a second electrical connection for powering the LED chip. Providing light transmissive heat sink can double the heat conduction from the LED dies thereby increasing life, or efficiency or luminance or a balance of the three. |
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Light Emitting Diode Package with Diffusor and method of manufacturing the same
Mar 16, 2007
The invention relates to an LED package for facilitating color mixing using a diffuser and a manufacturing method of the same. The LED package includes a substrate with an electrode formed thereon, and an LED chip mounted on the substrate. The LED package also includes an encapsulant applied around the light emitting diode chip, containing a diffuser. The LED package further includes a lens part disposed on the light emitting diode chip and the encapsulant to radiate light in a wide angle. The LED package allows light from the light emitting diode chip to be emitted out of the package without distortion. The invention allows light to exit through the encapsulant containing the diffuser and the lens part, achieving uniform diffusion and emission of light from the LED chip, thereby increasing a radiating angle and obtaining a uniform light source. |
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ITC adopts initial determination of infringement by Epistar’s MB LEDs and agrees to consider whether OMA and GB LEDs infringe as well
Feb 28, 2007
San Jose, CA — Administrative Law Judge (“ALJ”) Sydney Harris’ recommendation last month for the exclusion of Epistar’s metal bond (“MB”) products will stand according to a new, favorable ruling issued by the United States International Trade Commission (“ITC”) this week in Philips Lumileds’ patent infringement case against Epistar. |
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Light Emitting Diodes packaged for high temperature operation
Feb 13, 2007
In accordance with the invention, an LED packaged for high temperature operation comprises a metal base including an underlying thermal connection pad and a pair of electrical connection pads, an overlying ceramic layer, and a LED die mounted overlying the metal base. The LED is thermally coupled through the metal base to the thermal connection pad, and the electrodes are electrically connected to the underlying electrical connection pads. A low thermal resistance insulating layer can electrically insulate other areas of die from the base while permitting heat passage. Heat flow can be enhanced by thermal vias to the thermal connector pad. Ceramic layers formed overlying the base can add circuitry and assist in distributing emitted light. The novel package can operate at temperatures as high as 250°C... |
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Court decision has minimal impact: TIR to present strong evidence of invalidity and non-infringement
Feb 15, 2007
Vancouver, BC – TIR Systems Ltd. (TSX: TIR) - The United States District Court for the District of Massachusetts issued a decision that the evidence supporting inequitable conduct committed by Color Kinetics during prosecution of its patents before the United States Patent and Trademark Office was not sufficient to meet the high burden of proof required for this cause of action. |
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U.S. international trade commission administrative law judge rejects Philips Lumileds’ request to prohibit importation into the U.S. of downstream products containing Epistar’s LED products
Jan 29, 2007
Hsinchu, Taiwan-- The Administrative Law Judge (“ALJ”) of the U.S. International Trade Commission (“USITC”) issued his Recommended Determination that sets forth the final order the ALJ believes should be issued by the USITC. In his Recommended Determination, the ALJ did not recommend that a cease and desist order be issued, and rejected Philips Lumileds’ request to extend a limited exclusion order to third-party finished products. |
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Administrative Law Judge recommends order excluding Epistar’s infringing LEDs and downstream products
Jan 24, 2007
San Jose, California USA - Administrative Law Judge Harris of the International Trade Commission ("ITC") recommended that Epistar's infringing LED chips, along with certain products incorporating those infringing chips, should be the subject of a limited exclusion order. |
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Color Kinetics and Lamina Ceramics announce licensing agreement
Jan 19, 2007
Boston, MA and Westampton, NJ – Color Kinetics Incorporated (NASDAQ: CLRK) and Lamina Ceramics Inc. today announced the signing of a global licensing agreement. Lamina, a manufacturer of LED light engines, will have access to Color Kinetics’ complete patent portfolio to continue the development and sale of its products worldwide. |
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Nichia's actions against a US maker of Lighting Appliances
Jan 11, 2007
Nichia Corporation announced that it has recently reached resolution of an intellectual property dispute with a maker of Lighting Appliances in the U.S. Nichia has been actively pursuing its patent enforcement strategy and has been demanding that those who have sold products infringing Nichia's U.S. patents stop selling such products. |
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Cermet announces license agreement with georgia Institute of Technology for white LED technology
Jan 11, 2007
Atlanta, Georgia USA--Cermet, Inc has negotiated an exclusive license agreement for white LED technology developed with the Georgia Institute of Technology. |
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Philips Lumileds obtains favorable ruling in patent infringement litigation against Epistar
Jan 11, 2007
SAN JOSE, CALIFORNIA – Philips Lumileds announced today that it has received a favorable ruling from the Administrative Law Judge (“ALJ”) of the United States International Trade Commission (“ITC”) presiding over Philips Lumileds’ patent infringement litigation against Epistar Corporation. |
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Integrating chamber cone light using LED sources
Jan 02, 2007
A system to provide radiant energy of selectable spectral characteristic (e.g. a selectable color combination) uses an integrating cavity to combine energy of different wavelengths from different sources. The cavity has a diffusely reflective interior surface and an aperture for allowing emission of combined radiant energy. Sources of radiant energy of different wavelengths, typically different-color LEDs, supply radiant energy into the interior of the integrating cavity. In the examples, the points of entry of the energy into the cavity typically are located so that they are not directly visible through the aperture. The cavity effectively integrates the energy of different wavelengths, so that the combined radiant energy emitted through the aperture includes the radiant energy of the various wavelengths. The apparatus also includes a control circuit coupled to the sources for establishing output intensity of radiant energy of each of the sources. Control of the intensity of emission of the sources sets the amount of each wavelength of energy in the combined output and thus determines a spectral characteristic of the radiant energy output through the aperture...
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Diode Lighting System
Dec 26, 2006
A lighting system for stage, theatrical and architectural lighting, comprising a frame for supporting a plurality of light emitting diodes. The diodes are mounted to the frame so that each diode is both secured to the frame and also simultaneously positioned wherein each discrete diode light beam is directed to a prescribed remote focal point (target zone) and thereupon directed to a predetermined illumination area. Electrical power for transmitting and controlling electrical voltage to light emitting diodes by electrical circuitry integral with the frame. The frame can be configured as any hollow volume such a cone, a semi-ellipse, and a semi-sphere or can be configured as planar. Flexible blanks having apertures and pads for electrical connections can be used to construct rigid frames. An imaging gate a collimating lens and a focusing lens can be interposed between the frame and the illumination area. The frame can also be a sandwich frame having positive and negative electrically conductive layers interposed between layers of biasable insulating foam...
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Color Kinetics announces licensing agreement with Neo-Neon
Dec 21, 2006
Boston, MA, Color Kinetics Incorporated (NASDAQ: CLRK), a leading innovator of LED lighting systems and technologies, today announced the signing of a global licensing agreement with Neo-Neon International Ltd. Neo-Neon will be granted access to Color Kinetics’ complete patent portfolio, allowing the continuing development and sale of its LED lighting products worldwide. |
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Cree expands patent litigation against BridgeLux with additional patents
Dec 15, 2006
DURHAM, NC, Cree, Inc. (Nasdaq: CREE), a leader in LED solid-state lighting components, today announced that it has expanded its patent litigation against BridgeLux (formerly eLite Optoelectronics) with claims of infringement of U.S. Patent Nos. 6,614,056 (“the ‘056 patent”) and 6,885,036 (“the ‘036 patent”). |
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Dimming control circuit for light-emitting diodes
Dec 05, 2006
A dimming control circuit generates a dimming control signal for determining brightness of at least one light-emitting diode. The dimming control signal has a plurality of bright-dark cycles, each of which consists of a bright phase and a dark phase. The bright phase starts with an adaptive rising portion. The adaptive rising portion restricts the brightness of the at least one light-emitting diode to increase gradually from zero... |
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Led luminaire and arrangement comprising a luminaire body and an led operating device
Dec 07, 2006
The invention discloses an LED luminaire, in the case of which an LED module is applied to the luminaire body such that the height of the luminaire body and the LED module is ≦8 mm and the luminaire body at least partially forms the heat sink for the LED module. In this case, LED modules having power ratings of ≧3 watts are used. LED operating devices can be used for voltage supply purposes which form an outer face section of an arrangement comprising a luminaire body and an LED operating device, the total height of the luminaire body and LED operating device being ≦10 mm, and the LED operating device preferably being cooled via the luminaire body...
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Led system for illumination and data transmission
Dec 07, 2006 |
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TIR Systems awarded another patent for solid state lighting technology
Dec 11, 2006 |
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Color Kinetics and super vision reach comprehensive settlement
Dec 11, 2006 |
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Siemens unit sues citizen watch over diode patents
Dec 06, 2006 |
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Control system for an illumination device incorporating discrete light sources
TIR Systems Ltd. (Burnaby, CA) - US7,140,752
Nov 28, 2006 |
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Nichia settles with creative technology in U.S. litigation
Nov 29, 2006 |
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Systems and methods for controlling illumination sources
Color Kinetics - US7,135,824B2
Nov 20, 2006 |
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Intelligent drive circuit for a light emitting diode (LED) light engine
Dialight - US7,132,805
Nov 20, 2006
A controller for controlling a light emitting diode (LED) light engine. The controller includes a temperature sensor configured to sensor temperature at the LED light engine. A current sensor senses a drive current of the LED light engine. A voltage differential sensor senses a voltage differential across LEDs of the LED light engine. A timer monitors a time of operation of the LED light engine. Further, a control device controls the drive current to the LED light engine based on the sensed temperature, the sensed drive current, the sensed voltage differential, and the monitored time of operation. Further, the control device outputs an indication of intensity degradation of an LED, and if the intensity degradation exceeds a predetermined threshold the control can output an indication of such to a user, so that the user can be apprised that the LED needs to be changed... |
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Light emitting diodes packaged for high temperature operation
Lamina Ceramics, Inc. (Westampton, NJ) - US7,098,483B2
Aug 29, 2006
In accordance with the invention, an LED packaged for high temperature operation comprises a metal base including an underlying thermal connection pad and a pair of electrical connection pads, an overlying ceramic layer, and a LED die mounted overlying the metal base. The LED is thermally coupled through the metal base to the thermal connection pad, and the electrodes are electrically connected to the underlying electrical connection pads. A low thermal resistance insulating layer can electrically insulate other areas of die from the base while permitting heat passage. Heat flow can be enhanced by thermal vias to the thermal connector pad. Ceramic layers formed overlying the base can add circuitry and assist in distributing emitted light. The novel package can operate at temperatures as high as 250.degree. C... |
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Cyberlux Corporation awarded U.S. patent claims for emergency lighting technology
Nov 08, 2006
RESEARCH TRIANGLE, N.C., Cyberlux Corporation (OTC Bulletin Board: CYBL), a developer and manufacturer of solid-state diodaltm lighting solutions, announced today that the U.S. Patent Office has recently awarded protection for the Company’s “Apparatus and Methods for Providing Emergency Safety Lighting.” |
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Luminus devices announces issuance of core patents covering photonic lattice technology
Oct 27, 2006
Woburn, Massachusetts, Luminus Devices, Inc. today announced that it has received six major U.S. patents for its PhlatLight™ (Photonic Lattice Light Source) technology. |
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Color Kinetics and ARRI announce OEM agreement: ARRI adopts Color Kinetics' technology to enter intelligent LED lighting market
Oct 27, 2006
Boston, MA, USA and Munich, Germany, Color Kinetics Incorporated (NASDAQ: CLRK) and ARRI Inc. today announced an agreement through which ARRI, one of the world's largest manufacturers of motion picture equipment, will use Color Kinetics' technology and intellectual property to develop a line of LED-based studio lighting products. Slated for availability this year, |
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BridgeLux files lawsuit against Cree for patent infringement
Oct 20, 2006
Sunnyvale, California, USA, BridgeLux, Inc., a leading supplier of energy saving LED chips to high-volume solid state lighting market segments, today announced it has filed a motion to dismiss the lawsuit filed against it by Cree, Inc. and Boston University on September 12, 2006 alleging infringement of US Patent Numbers 6,657,236 and 5,686,738. |
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Beadlight awarded patent for innovative diffusion system
Oct 13, 2006
Beadlight Ltd., an innovator in LED diffusion and video effect technologies, has announced the Grant of Patent No. GB2392488 by the UK Patent Office entitled "Illumination device". |
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Light emitting diode package with protective function against electrostatic discharge
SAMSUNG ELECTRO MECH - US2006214181
Sep 28, 2006
The present invention provides an LED package having an MEMS switch operated by electrostatic force, capable of continuously protecting an LED from excessive current due to electrostatic discharge. The invention includes a submount with first and second electrode patterns formed thereon; an LED mounted on the submount, having an n-electrode electrically connected to the first electrode pattern and a p-electrode electrically connected to the second electrode pattern; and an MEMS switch including a first conductive plate and a second conductive plate bent to have an area over and vertically apart from the first conductive plate, wherein the first and second conductive plates are electrically connected to the first and second electrode patterns, and the second conductive plate comes in contact with the first conductive plate by electrostatic force upon being applied with voltage higher than a predetermined level of voltage... |
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Color Kinetics and Osram Sylvania announce licensing agreement
Oct 05, 2006
Boston and Danvers, Massachusetts USA, Color Kinetics Incorporated and Osram Sylvania today announced an agreement whereby Osram Sylvania will license Color Kinetics' patents for a product to be marketed by Gotham Architectural Downlighting, an Acuity Brands company. |
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Nichia and Moeller settled an Infringement lawsuit for Blue LED patents in Japan and agreed to business arrangement
Oct 05, 2006
Nichia Corporation announced today that it settled a patent lawsuit in Japan, which it had filed against Moeller Electric Limited. |
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Beadlight wins patent for diffusion system
Sep 28, 2006
UK - Beadlight Ltd, an innovator in LED diffusion and video effect technologies, has announced the grant of Patent No. GB2392488 by the UK Patent Office entitled 'Illumination device'. |
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BridgeLux responds to Cree lawsuit
Sep 21, 2006
Sunnyvale, California, USA, BridgeLux, Inc., a leading supplier of energy saving LED chips to high-volume solid state lighting market segments, confirmed that on September 12, 2006, it was served in a lawsuit filed by Cree, Inc. and Boston University alleging infringement of US Patent Numbers 6,657,236 and 5,686,738. |
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Competitive Technologies to commercialize optical technology for LED lighting market
Sep 21, 2006
Competitive Technologies, Inc. today announced that it has signed an exclusive, worldwide service and representation agreement with Illumitex, LLC to license optical technology for the light emitting diode ("LED") industry. The technology is a fundamental and enabling primary optical device that significantly improves the effectiveness of High Brightness LEDs ("HBLEDs"). |
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Cree files lawsuit against bridgeLux for patent infringement
Sep 06, 2006
DURHAM, NC, Cree, Inc. (Nasdaq: CREE), a leader in LED solid-state lighting components, today announced that it has filed suit against BridgeLux, Inc. (formerly eLite Optoelectronics) for infringement of U.S. Patent Nos. 6,657,236 (“the ‘236 patent”) and 5,686,738 (“the ‘738 patent”). |
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