Resources Archive

IP, Reports & Roadmaps | Apr 29, 2017
LED lighting system
LED lighting system Method and system are disclosed for compensating for color variations due to thermal differences in LED based lighting systems. The method and system involves characterizing the LEDs to determine what PWM (pulse-width modulation) is needed at various operating temperatures to achieve a desired resultant color. The characterization data is then stored in the microprocessor either in the form of a correction factor or as actual data. When an operating temperature that is different from a calibration temperature is detected, the characterization data is used to adjust the PWM of the LEDs to restore the LEDs to the desired resultant color. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
LED Lighting Fixtures Receives First Patent
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. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
LED driver
LED driver A light emitting diode (LED) driver to drive an LED, including a current adjusting unit to adjust magnitude of a current flowing on the LED by supplying power from a power supply device to the LED and cutting off the power. A modulation control unit is provided to modulate a waveform of the current flowing on the LED by controlling the adjustment operation of the current adjusting unit. A constant current offset unit to control the adjustment operation of the current adjusting unit is provided so that the current flowing on the LED is higher or equal to a predetermined value as the waveform thereof is modulated. Thus, provided is an LED driver having improved power consumption efficiency. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
LED drive circuit having temperature compensation
LED drive circuit having temperature compensation 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. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Kyma Acquires Select Assets and IP Rights from Fox Group
Kyma Technologies, Inc., a leading supplier of ultra-high purity crystalline gallium nitride (GaN) and aluminum nitride (AlN) materials and related products and services, is pleased to announce that Kyma has acquired from The Fox Group certain assets and intellectual property rights. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Korean Court Finds Seoul Semiconductor Liable for Defamation
Nichia Corporation announced today that the Seoul Central District Court rendered a decision that Seoul Semiconductor Co., Ltd. is liable for defamation, and ordered Seoul Semiconductor to pay Nichia a damages amount of KRW 10,000,000, as well as take appropriate corrective measures to restore Nichia’s reputation. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Judge Chesney Denies Fees for "Side View LED Design Patent Infringement" to Nichia
In the side view LED design patent infringement litigation between Seoul Semiconductor Co. Ltd. (“Seoul”) and Nichia Corporation (“Nichia”), Judge Chesney of the U.S. District Court for the Northern District of California issued an "Order Denying Plaintiff's [Nichia's] Motion for Finding of Exceptional Case and Award Attorney's Fees." By the motion, Nichia sought approximately $2.5 million in fees against Seoul. In her order, Judge Chesney ruled that it "would not be appropriate" to award fees to Nichia and that the case was not exceptional. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
ITC Investigation on Products Suspected to Infringe Professor Neumark's LED/LD Patent
The U.S. International Trade Commission (ITC) has voted to institute an investigation of certain short-wavelength light emitting diodes, laser diodes, and products containing same. The products at issue in this investigation are short-wavelength (e.g., blue, violet) LEDs and laser diodes that are used in products such as hand-held mobile devices, instrument panels, billboards, traffic lights, HD DVD players (e.g., Blu-ray disc players), and data storage devices. 30 companies are affected by the investigation. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
ITC Denies Epistar`s Motion to Stay Exclusion Order in Investigation Initiated by Philips Lumileds
The United States International Trade Commission (ITC) has denied Epistar`s motion to stay the ITC`s Exclusion Order barring importation of Epistar`s OMA, MB and GB LEDs. After the ITC ruled that Epistar`s current AlInGaP LEDs infringe Philips Lumileds` patent rights and issued an exclusion order banning importation of those LEDs, Epistar filed motions before both the ITC and the U.S. Court of Appeals for the Federal Circuit to stay enforcement of the exclusion order. The ITC has denied Epistar`s motion. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
ITC adopts initial determination of infringement by Epistar’s MB LEDs and agrees to consider whether OMA and GB LEDs infringe as well
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. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Intematix Awarded Sixth Patent for Remote Phosphor LED Lighting Designs
Intematix Corporation, a leading innovator of patented phosphor materials and components for high-quality LED lighting, has been awarded a sixth remote phosphor patent by the U.S. Patent and Trademark Office. Intematix’s new patent will help designers develop a new generation of high-efficiency LED lighting fixtures. This latest patent marks the fourth remote phosphor patent Intematix has received this year. The company, which is a leader in the commercialization of remote phosphor technology, has another 85 remote phosphor patents pending worldwide in addition to the six issued U.S. patents. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Intematix and Tridonic Consortium Announce Agreement on BOSE Phosphor Patents for LEDs
Intematix, a leading U.S. manufacturer of LED phosphors, and Tridonic, a leading manufacturer of lighting components and part of the Zumtobel Group of Austria, today announced a comprehensive licensing agreement governing silicate patents for LEDs. The patents control the use of LED phosphor materials and the application of the phosphors in LEDs. The BOSE patents are held by a consortium of four companies: Tridonic, Toyoda Gosei, Leuchtstoffwerk Breitungen and Litec GbR. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Intematix Adds Latest Phosphor Patent Award to Growing IP Portfolio
Intematix Corp. a leading innovator of advanced materials solutions and provider of patent-backed merchant phosphor products for solid state lighting applications, today announced the addition of US Patent Number 7,311,858 for silicate based yellow-green phosphors to its growing intellectual property portfolio. Yellow-green phosphors are typically combined with a blue LED emitter to produce energy efficient solid state white lighting in a growing variety of applications. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Intelligent drive circuit for a light emitting diode (LED) light engine
Intelligent drive circuit for a light emitting diode (LED) light engine 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. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Integrating chamber cone light using LED sources
Integrating chamber cone light using LED sources 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. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Integrated led chip to emit multiple colors and method of manufacturing the same
Integrated led chip to emit multiple colors and method of manufacturing the same 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. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Higher Regional Court Karlsruhe Confirms OSRAM Patents
The higher regional court Karlsruhe confirmed that Malaysian LED manufacturer Dominant is illegally using or has used OSRAM AG technology with seven patents. As the court of first instance, the regional court Mannheim already reached the same verdict regarding three of these patents on July 25, 2007. OSRAM had sued the manu-facturer on several patents and industrial properties. “The ruling of the court of appeal in Karlsruhe is an important confirmation of our intellectual property rights”, said Aldo Kamper, CEO of OSRAM Opto Semiconductors. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
High output light emitting diode and method for fabricating the same
High output light emitting diode and method for fabricating the same A high output light emitting diode (LED) and a method for fabricating the LED is disclosed. The LED includes a sidewall or surface that is inclined. A reflective film is formed on the inclined sidewall or surface to allow light to reflect from the reflective film and to emit the light upward or in a favorable direction with respect to the device, thereby being configured and enabled to improve a light output of the LED and dispense with an additional passivation process. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
High efficiency light emitting diode (LED) with optimized photonic crystal extractor
High efficiency light emitting diode (LED) with optimized photonic crystal extractor A high efficiency, and possibly highly directional, light emitting diode (LED) with an optimized photonic crystal extractor. The LED is comprised of a substrate, a buffer layer grown on the substrate (if needed), an active layer including emitting species, one or more optical confinement layers that tailor the structure of the guided modes in the LED, and one or more diffraction gratings, wherein the diffraction gratings are two-dimensional photonic crystal extractors. The substrate may be removed and metal layers may be deposited on the buffer layer, photonic crystal and active layer, wherein the metal layers may function as a mirror, an electrical contact, and/or an efficient diffraction grating. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Flip-chip light emitting diode with high light-emitting efficiency
Flip-chip light emitting diode with high light-emitting efficiency 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. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
External extraction light emitting diode based upon crystallographic faceted surfaces
External extraction light emitting diode based upon crystallographic faceted surfaces A light emitting diode is disclosed that includes a support structure and a Group III nitride light emitting active structure mesa on the support structure. The mesa has its sidewalls along an indexed crystal plane of the Group III nitride. A method of forming the diode is also disclosed that includes the steps of removing a substrate from a Group III nitride light emitting structure that includes a sub-mount structure on the Group III nitride light emitting structure opposite the substrate, and thereafter etching the surface of the Group III nitride from which the substrate has been removed with an anisotropic etch to develop crystal facets on the surface in which the facets are along an index plane of the Group III nitride. The method can also include etching the light emitting structure with an anisotropic etch to form a mesa with edges along an index plane of the Group III nitride. Read more »
IP, Reports & Roadmaps | Apr 29, 2017
Evident Technologies Announces Issuance of Key Patent for Semiconductor Nanocrystal Synthesis
Evident Technologies, Inc. today announced the issuance of US Patent No. 7,482,059 covering the ability to synthesize a semiconductor nanocrystal structure with a metal layer which dramatically enhances the brightness and stability of the semiconductor nanocrystal complex. This newly issued patent represents another major advance of semiconductor materials science and further enhances the breadth of the company's expansive intellectual property portfolio. Read more »
News-Spot | IP, Reports & Roadmaps | Apr 29, 2017
Everlight Files Patent Infringement Suit against Nichia in US Court
Everlight Electronics Co., Ltd. today filed a patent infringement lawsuit against Nichia Corp. in the United States District Court for the Eastern District of Michigan. The lawsuit seeks to enjoin Nichia from manufacturing, using, importing, offering for sale, or selling its infringing products in the United States It also seeks monetary damages. Read more »
News-Spot | IP, Reports & Roadmaps | Apr 29, 2017
Everlight Fights Back Against Nichia in LED Patent Battle
After Everlight won a victory over Nichia for the patent administrative litigation (Patent No. 089036) in the Taiwan Supreme Administrative Court in October 2011, the Taiwan Supreme Court this November ruled in favor of Everlight again in the civil infringement case on Nichia’s patent in issue, which finalizes all cases regarding this patent. Furthermore, facing the situation that Nichia has affected fair competitive market mechanisms by filing patent infringement lawsuits and announcing press releases, Everlight decided to fight back. Today (12/1), Everlight brought a lawsuit in the Tokyo District Court demanding that Nichia stop spreading false allegations and seeking an award of damages. Read more »
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