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 »
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 »
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.
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Diode 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.
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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 »
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 »
Color Kinetics and super vision reach comprehensive settlement
TIR Systems awarded another patent for solid state lighting technology
Led luminaire and arrangement comprising a luminaire body and an led operating device
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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Siemens unit sues citizen watch over diode patents
Dimming Control Circuit for Light-Emitting Diodes
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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Nichia settles with creative technology in U.S. litigation
Control system for an illumination device incorporating discrete light sources
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.
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