IP, Reports & Roadmaps | Sep 06, 2006

Epistar licenses unique LED technology from ITRI

Taipei, Epistar Corp., a leading Taiwanese supplier of light emitting diode (LED) chips, has recently licensed a unique technology for boosting LED lumen from the government-backed Industrial Technology Research Institute (ITRI), making its patent deployment more complete. Read more »

IP, Reports & Roadmaps | Sep 06, 2006

Cree files lawsuit against bridgeLux for patent infringement

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”). Read more »

IP, Reports & Roadmaps | Sep 04, 2006

Ya Hsin acquires Osram’s LED technology for general lighting

Taipei, Ya Hsin Industrial Co., Ltd. will become the first Taiwanese manufacturer to license white-LED technology for general lighting purpose from Osram should the two companies sign an agreement early next month. Read more »

IP, Reports & Roadmaps | Aug 31, 2006

High efficiency light emitting diode (LED) with optimized photonic crystal extractor

Cross sectional side view of the structure 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 | Aug 29, 2006

Light emitting diodes packaged for high temperature operation

Schematic cross section of an LED packaged for high temperature operation 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. Read more »

IP, Reports & Roadmaps | Aug 24, 2006

External extraction light emitting diode based upon crystallographic faceted surfaces

Cross sectional schematic view of a light emitting diode 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 | Aug 23, 2006

Sidley Austin LLP announces client settlement of patent infringement claims against LED manufacturer

Sidley Austin LLP announced today that the firm represented Professor Gertrude Neumark Rothschild in her settlement of claims of patent infringement against Toyoda Gosei Co. Ltd., and Toyoda Gosei North America Corporation. Read more »

IP, Reports & Roadmaps | Aug 17, 2006

TIR surpasses milestone of 100 patent filings: TIR'S Leadership in SSL technology creates demand for speaking engagements and technical papers

Vancouver, BC – TIR Systems Ltd. (TSX: TIR), announces that as of August 1, the company has 113 patent applications in addition to six patents already granted in the field of Solid State Lighting (SSL). Read more »

IP, Reports & Roadmaps | Aug 04, 2006

Lighting Science Group is granted eighth patent for advances in LED lighting technologies

DALLAS, Lighting Science Group Corporation (OTCBB:LSGP) announced today that the United States Patent and Trademark Office has granted the company its eighth patent for Optimized Digital Lighting(TM) (ODL(R)) technologies. Read more »

IP, Reports & Roadmaps | Aug 03, 2006

Side view led package having lead frame structure designed to improve resin flow

Front elevation view illustrating a side view LED package mounted with lead frames The invention relates to a side view LED package in use with an LCD backlight unit. The side view LED package comprises: an LED chip; and a strip-shaped lead frame having a toothed structure formed in a lateral edge thereof. The LED chip is mounted on a surface of the lead frame. An integral package body is made of resin, and includes a hollow front half having a cavity for housing the LED chip and a solid rear half divided from the front half by the lead frame. The toothed structure of the lead frame structure can improve resin flow in order to ensure stability even if the LED package is made extremely thin. Read more »

IP, Reports & Roadmaps | Aug 03, 2006

LED driver

Circuit diagram illustrating an examplary circuit 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 | Jul 20, 2006

Method of making a vertical light emitting diode

SEM image of a light extracting LED Methods are disclosed for forming a vertical semiconductor light emitting diode (VLED) device having an active layer between an n-doped layer and a p-doped layer; and securing a plurality of balls on a surface of the n-doped layer of the VLED device. Read more »

IP, Reports & Roadmaps | Jul 05, 2006

High output light emitting diode and method for fabricating the same

High output LED bonded to a reflective plate to emit light 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 | Jul 05, 2006

Semiconductor light emitting diode having textured structure and method of manufacturing the same

Cross sectional view of a semiconductor light emitting diode A semiconductor light emitting diode having a textured structure and a method of manufacturing the semiconductor light emitting diode are provided. The method includes forming a first semiconductor layer on a substrate; forming a textured structured first semiconductor layer by penetrating a material of a material layer into the first semiconductor layer after the material layer is formed on the first semiconductor layer and annealed; and forming a second semiconductor layer on the first semiconductor layer. Read more »

IP, Reports & Roadmaps | Jun 27, 2006

LED lighting system

Block diagram of a portion of an LED based 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 »

FEATURED

LumiTop 4000: Comprehensive Optical Wafer Testing for μLEDs

LumiTop 4000: Comprehensive Optical Wafer Testing for μLEDs Instrument Systems offers a unique camera-based measurement solution for μLED wafer testing that generates 2-dimensional, pixel-resolved optical analyses within given cycle times. The LumiTop 4000 has a resolution of 12 MP and can detect the smallest of defects and inhomogeneities on the wafer. ... Read more »

FEATURED

Lumileds Maximizes Field Usable Lumens: New LUXEON HL2X LED

Lumileds Maximizes Field Usable Lumens: New LUXEON HL2X LED Lumileds introduces the LUXEON HL2X, the ideal choice for roadway lighting and sports lighting fixtures with the highest flux and efficiency in an industry standard package. "With 318+ lumens at 700 mA and 85°C, LUXEON HL2X delivers more 'field usable lumens' for optical engineers to work with. ... Read more »

EDITORIAL

Australian Associated Press Recently Wrote: Red Light Could Improve Over-40s' Eyesight

Australian Associated Press Recently Wrote: Red Light Could Improve Over-40s' Eyesight A small LED torch that emits deep red light could help improve declining eyesight, scientists have said: A study by University College London, involving a small sample size of 24 people, has shown that staring at long wavelength light for three minutes every day can "significantly improve vision" ... Read more »

EDITORIAL

Signify Invests to Broaden Its UV-C Lighting Portfolio for Professional Disinfection

Signify Invests to Broaden Its UV-C Lighting Portfolio for Professional Disinfection Signify, the world leader in lighting, is increasing its UV-C lighting production capacity and expanding its UV-C product portfolio. The company is leveraging more than 35 years of expertise in UV-C lighting to address the growing global need for the disinfection of air, surfaces and objects. Read more »