Abstract: A bi-directional communication system communicates between a control station, which receives and outputs control signals, and one or more display cabinets. LEDs illuminate objects disposed about the cabinets. Addressable nodes interactively communicate with the control station and selectively operate the LEDs, each node being coupled to the control station and to associated LEDs.

Abstract: The inventive dummy load is mounted on the input power cables of a traffic signal while managing the heat load generated by either a resistive and/or capacitive load. Using the inventive dummy load, there is no thermal path back to the light emitting diode (LED) board. The inventive dummy load may be easly installed, removed, or replaced. The dummy load can be retrofit to adapt to a new controller, either by adding to or replacing the dummy load after initial installation or by removing part or all of the dummy load. There is no need to breach the sealed lamp to adjust the dummy load. Thus, field-adjustments can be made. Further, the number of parts required to manufacture lamps for a variety of retrofit applications are reduced, which in turn reduces the cost and complexity of the lamp.

Abstract: A string light engine includes a flexible power cord, a heat sink, an IDC terminal, a PCB, and an LED. The flexible power cord includes an electrical wire and an insulating material for the wire. The heat sink attaches to the power cord. The IDC terminal is inserted through the insulating material and electrically communicates with the wire. The PCB is at least partially received in the heat sink. The PCB includes a first surface having circuitry and a second surface opposite the first surface. The circuitry is in electrical communication with the IDC terminal. The second surface is abutted against a surface of the heat sink so that heat is transferred from the LED into the heat sink. The LED mounts to the first surface of the PCB and is in electrical communication with the circuitry.

Abstract: A system is employed to provide a substantially constant intensity light source via functional circuitry, the functional circuitry comprises a switching power supply. At least one signal is part of a matrix of LEDs connected in series and parallel and configured for redundancy. A monitoring circuit comprises a current sense circuit, wherein the current sense circuit includes an amplifier and at least one resistor in series with the amplifier. The current sense circuit includes a power converter circuit that senses a current of a flyback diode, recovers a dc component of a waveform via a low pass filter, and provides feedback control of the at least one signal.

Abstract: A LED symbol signal with LEDs arrayed to correspond to a desired symbol. A mask defines the desired symbol. A diffusion surface on the cover diffuses the display aspect, obscuring the individual LEDs. The mask is spaced a distance from the diffusing surface. The more aggressive the diffusion pattern the closer the mask is spaced to the diffusion pattern. Preferably, the ratio of the pitch of the optical elements to the width of the symbol at the diffusion surface is less than 1:2, preferably less than 1:4, more preferably less than 1:6 and most preferably approximately 1:10.

Abstract: A retaining device holds a PCB to a heat sink that has channels for receiving the retaining device. The retaining device includes a body having portions configured for receipt into the channels of the heat sink and moveable tabs and protuberances protruding away from a first surface of each moveable tab. A method for holding the PCB to the heat sink is disclosed. A lighting assembly that includes the retaining device is also disclosed.

Abstract: A string light engine includes a plurality of LEDs, a plurality of IDC connectors, and an insulated flexible conductor. Each IDC connector is in electrical communication with at least one of the plurality of LEDs and is operatively mechanically connected to at least one of the plurality of LEDs. The IDC connectors attach to the conductor.

Abstract: A splice connector includes a first IDC terminal, a second IDC terminal, a body receiving the first and second IDC terminals, and a cover connected to the body such that the cover selectively slides with respect to the body in the first linear direction from first position to a second position. The body defines a first seat configured to receive an associated first cable and second seat configured to receive an associated second cable that is to be electrically connected to the associated first cable. The first and second IDC terminals each include a portion that extends into a region adjacent a respective wire seat. The cover is configured to cooperate with the body where a portion of the cover engages a portion of the body at a third position between the first position and the second position such that in the third position movement of the cover with respect to the body in a second direction, which is opposite the first, is inhibited.

Abstract: A light engine (16) includes at least one LED (12) for generating light of one of a plurality of wavelengths. The LED (12) is disposed on the magnetic core printed circuit board (14). A heatsink (26) is disposed in thermal communication with a base (24) and the LED (12) for conducting thermal energy away from the LED (12). The light engine (16) is magnetically attached to the heatsink (26) via a magnet (50) which is attached to the heatsink (26) to create that a magnetic force between the magnetic core board (14) and the heatsink (26).

Abstract: A heat dissipating lamp is provided. The lamp includes a reflector, a lens cover, a support structure interposed between the reflector and the lens cover, and an LED mounted to the support structure. The lens cover includes a portion adjacent a peripheral edge of the reflector. The support structure includes a bridge.

Abstract: An LED light engine includes a flexible electrical cable and a plurality of LEDs. The flexible electrical cable includes first, second and third electrical conductors and an electrically insulating covering for the electrical conductors. The conductors are arranged substantially parallel with one another having an insulating material therebetween. A first LED including a first lead electrically connects to the first electrical conductor and a second lead of the first LED electrically connects to the second conductor. A second LED includes a first lead electrically connected to the second electrical conductor and a second lead electrically connected to the third electrical conductor. A third LED includes first and second leads electrically connected to the second conductor. The third LED is interposed between the first LED and the second LED.

Abstract: An illuminated street sign illuminated by LEDs. A light engine comprising a light engine carrier, at least one LED, a heat sink and optionally a reflector and/or lens system is used to illuminate a street sign. The light engine can be retrofit into existing illuminated street signs after removal of the fluorescent tube, attached to the interior of conventional housings or be integrally formed with the housing of an illuminated sign. A pair of light engines are mounted in the housing at an angle to direct the light to the opposite side panel. Each light engine has a reflector. An additional reflector can be mounted n the base of the housing.

Abstract: An electrical apparatus that is cooled via natural convection includes an electrical component, a vertical heat dissipation surface in thermal communication with the electrical component, and a diverter extending from the heat dissipation surface. The diverter disrupts vertical airflow over the heat dissipation surface.

Abstract: A phosphor having the formula Na2(Ln1-y-zCeyTbz)2B2O7, wherein Ln is selected from the group consisting of La, Y, Gd, Lu, Sc and combinations thereof and wherein y=0.01-0.3 and z=0.0-0.3. The phosphor is suitable for use in a white-light emitting device including a UV/blue semiconductor light source having a peak emission from about 250 to about 550 nm and a phosphor blend including a blue emitting phosphor, a red emitting phosphor and a green emitting phosphor having the above described formula.

Abstract: A method for separating individual optoelectronic devices, such as LEDs, from a wafer includes directing a laser beam having a width toward a major surface of the semiconductor wafer. The laser beam has an image with a first portion of a first energy per unit width and a second portion of a second energy per unit width less than the first energy. The laser beam image cuts into the first major surface of the semiconductor wafer to produce individual devices.

Abstract: An LED traffic signal having a single switching power supply placed inside the load switch to supply power to each of the aspect signals. The traffic signal has several aspects, such as red, yellow and green. The load switch comprises a switching power supply to supply power to the signals, an output selection circuit to select the desired aspect, and a conflict monitor interface circuit to mimic an incandescent circuit.

Abstract: A method for using LEDs to supplement natural light in a greenhouse and a support structure for attaching LEDs in a greenhouse so that the plants receive substantially even light distribution from the LEDs and minimal natural light is blocked by the lighting system. A narrow attachment rail is used to suspend a strip of LEDs from the frame structure of the greenhouse.

Abstract: A flip-chip LED device (10) includes a plurality of group III-nitride semiconductor layers (22) defining a p/n junction and including a top p-type group III-nitride layer (28), and a p-contact (30, 30?, 30?) for flip-chip bonding the top p-type group III-nitride layer. The p-contact includes an aluminum layer (32) disposed on the top p-type group III-nitride layer (28), and an interface layer (40, 66, 72, 80) disposed between the aluminum layer and the top p-type group III-nitride layer. The interface layer reduces a contact resistance between the aluminum layer (32) and the top p-type group III-nitride layer (28). The interface layer comprises one or more group III-nitride layers.

Abstract: A light-emitting microelectronic package includes a light-emitting diode (110) having a first region (114) of a first conductivity type, a second region (116) of a second conductivity type, and a light-emitting p-n junction (118) between the first and second regions. The light-emitting diode defines a lower contact surface (120) and a mesa (122) projecting upwardly from the lower contact surface. The first region (114) of a first conductivity type is disposed in the mesa (122) and defines a top surface of the mesa, and the second region (116) of a second conductivity type defines the lower contact surface that substantially surrounds the mesa (122). The mesa includes at least one sidewall (130) extending between the top surface (124) of the mesa and the lower contact surface (120), the at least one sidewall (130) having a roughened surface for optimizing light extraction from the package.

Abstract: A border lighting strip (10) includes an electrical cable (14) having a plurality of electrical conductors (14A, 14B). A plurality of light emitting devices (LEDs) (12) arranged alongside the electrical cable (14) and electrically connected (12A, 12B) thereto. An essentially hollow extruded sheath (16) of translucent or transparent material is adapted to receive the LEDs (12). The sheath (16) also includes an integrally formed cylindrical lens (18) arranged to optically cooperate with the LEDs (12). A method (200)for manufacturing a lighting strip includes electrically connecting (202, 204, 206, 208) a plurality of light emitting devices to an electrical cable to form a linear light source (214), extruding (216) a transparent or translucent sheath adapted to receive the linear light source (214), and inserting (218) the linear light source into the extruded sheath to form the border lighting strip (220).