IP, Reports & Roadmaps | Jan 11, 2007

Cermet announces license agreement with georgia Institute of Technology for white LED technology

Atlanta, Georgia USA--Cermet, Inc has negotiated an exclusive license agreement for white LED technology developed with the Georgia Institute of Technology. Read more »

IP, Reports & Roadmaps | Jan 11, 2007

Nichia's actions against a US maker of Lighting Appliances

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. Read more »

IP, Reports & Roadmaps | Jan 02, 2007

Integrating chamber cone light using LED sources

Example of a radiant energy emitting system 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 | Dec 26, 2006

Diode Lighting System

Schematic side view of the lighting system 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. Read more »

IP, Reports & Roadmaps | Dec 21, 2006

Color Kinetics announces licensing agreement with Neo-Neon

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. Read more »

IP, Reports & Roadmaps | Dec 15, 2006

Cree expands patent litigation against BridgeLux with additional patents

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”). Read more »

IP, Reports & Roadmaps | Dec 07, 2006

Led luminaire and arrangement comprising a luminaire body and an led operating device

Detail of the luminaire 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. Read more »

IP, Reports & Roadmaps | Dec 05, 2006

Dimming Control Circuit for Light-Emitting Diodes

Circuit diagram showing a conventional LED drive circuit 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. Read more »

IP, Reports & Roadmaps | Nov 20, 2006

Intelligent drive circuit for a light emitting diode (LED) light engine

Overview of a control system of the present invention 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 »

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 »