Abstract: A lamp is disclosed, which comprises a tubular, an elongate and two end-caps, wherein the tubular body comprises two ends of the tubular body; the elongate light source board is inside the tubular body along a longitudinal direction thereof, and the elongate light source board comprises at least one light source arranged thereon and two ends of the elongate light source board; two end-caps are adapted to seal the two ends of the tubular body respectively, and at least one end-cap is slidingly connected to one of the two ends of the tubular body and fixedly connected to one of the two ends of the elongate light source board. The lamp of the present disclosure can be adapted to temperature changes, and can avoid an overall length variation, and/or a bending deformation in appearance.

Abstract: Aspects of the present disclosure include a dimming device comprising a dimming signal interface module which includes an optical coupling module and an analog-digital converter module having its input terminal connected to the input terminal of the dimming signal interface module and its output terminal selectively connected to the optical coupling module. The dimming signal interface module may receive digital signals and analog signals. When the analog signals are received by the input terminal of the dimming signal interface module, the analog-digital converter module may convert the analog signals to square-wave signals and output the square-wave signals to the optical coupling module. When digital signals are received by the input terminal of the dimming signal interface module, the output terminal of the analog-digital converter module may be disconnected from the optical coupling module. The dimming device may be able to receive digital and analog control signals to be used for dimming.

Abstract: A stabilizing circuit is disclosed, which may be employed with lighting systems, such as with lighting system power supply operations. The circuit comprises a monitoring circuit configured to detect a characteristic of a power supply, and a switching controller configured to disconnect a primary load from the power supply and connect an auxiliary load to the power supply when the detected characteristic fails to meet a specified parameter. This is done to ensure compatibility and stability of both the power supply and the primary load. For example, when an AC mains voltage providing power to the power supply becomes unstable, the stabilizing circuit may be configured to prevent the power supply from remaining in a self-protection mode that may cause the primary load to become unstable. A method for stabilizing a circuit is also disclosed.

Abstract: The present disclosure provides a lamp assembly (200), comprising a base (202), an outer jacket (204) mounted to the base (202), a first reflective substrate (206, 208) positioned within the outer jacket (204), and a first solid-state light source (220) disposed proximate the first reflective substrate (206, 208). The outer jacket (204) may be glass. The outer jacket (204) may hermetically seal the first solid-state light source (220).

Abstract: Light sources that emit light having enhanced color spectrum characteristics are described. A color metric called the Lighting Preference Index (LPI) is disclosed that enables quantitative optimization of color preference by tailoring the spectral power distribution of the light source. In an embodiment, a lamp includes at least one blue light source having peak wavelength in the range of about 400 nanometer (nm) to about 460 nm, at least one green or yellow-green light source having peak wavelength in the range of about 500 nm to about 580 nm, and at least one red light source having peak wavelength in the range of about 600 nm to about 680 nm, wherein the lamp has an LPI of at least 120.

Abstract: Provided is a master printed circuit board (PCB). The master PCB includes panels defined by grooves cut in the master PCB, the grooves separating one panel from another. A final PCB is formable via use of one or more jumpers, wherein the jumpers are configured to extend across at least one of the grooves to electrically connect one panel to another panel. The electrically connected panels form the final PCB.

Abstract: Materials and lightguides formed thereof that are suitable for use in lighting units to impart a color filtering effect to visible light. At least a portion of such a lightguide (16) is formed of a composite material comprising a polymeric matrix material and an inorganic particulate material that contributes a color filtering effect to visible light passing through the composite material, and the particulate material comprises a neodymium compound containing Nd3+ ions.

Abstract: Provided is a traffic communication network that includes a signaling system having a plurality of light signaling devices, a controller disposed at at least one traffic intersection, and configured to wirelessly control the plurality of light signaling devices. A remote control system is also provided to wirelessly transmit commands to the controller and directly to the plurality of light signaling devices.

Abstract: A drive circuit coupled to a switching device for controlling operations of a load, which includes: a drive element configured to be coupled to the switching device; a control circuit for shutting down and turning on the drive element to control the switching device to operate and stop the load, the control circuit including a control switch having a first terminal coupled to the drive element and a second terminal to receive a control signal for controlling the drive element operation. The control switch is turned on by a first control signal, shutting down the drive element and the switching device to stop operating the load. The control switch is turned off by a second control signal, turning on the drive element and controlling the switching device to operate the load normally.

Abstract: An apparatus including a housing; a solid state light source disposed in the housing to emit light therefrom; and a filter disposed in or on the housing in optical communication with the solid state light source to reshape a radiometric spectrum of the light emitted by the solid state light source to substantially replicate a radiometric spectrum of an incandescent filament light source.

Abstract: Provided is a traffic communication network that includes a signaling system including a plurality of light signaling devices, and a controller configured to wirelessly control the plurality of light signaling devices; and a remote control system in wireless communication with the controller and configured to control the controller.

Abstract: A DC current driver includes a DC current drive circuit configured to provide a DC supply current and receive a DC return current. A switch is coupled in series with the DC return current, and a supplemental power supply is coupled in parallel with the switch and configured to provide a supplemental voltage. Opening the switch diverts the DC return current through the supplemental supply and closing the switch causes the DC return current to bypass the supplemental supply.

Abstract: Embodiments of a lamp that utilizes a reflector and a light source with light-emitting diode (LED) devices to generate an optical intensity distribution substantially similar to that of a conventional incandescent light bulb. These embodiments utilize an operation configuration with parameters that define relationships between components of the lamp to generate the optical intensity distribution. These parameters can, in one example, set out the position of the reflector relative to the light source as well as the ratio between dimensions of the reflector and the light source. In one embodiment, the reflector is in position relative to the light source to form a blocking area proximate the light source that defines a part of the lamp that does not diffuse light.

Abstract: An system including a housing defining an enclosure and having an aperture in an exterior surface of the housing; a concave reflector, the reflector being disposed on or in the enclosure of the housing to reflect light emissions; a plurality of solid state light sources disposed within the housing to direct light emissions within the enclosure towards the reflector, the plurality of solid state light sources including multiple groups of solid state light sources; and a mixing chamber defined by a space within the enclosure located between the reflector and the aperture, wherein the reflector is configured to reflect light emissions from the plurality of solid state light sources towards the mixing chamber where the reflected light emissions are to combine before exiting the housing through the aperture.

Abstract: A luminaire includes a housing having an external surface and an internal surface defining an interior volume, with an LED light source mounted on a mounting surface within the interior volume, an internal inter-surface structure within the interior volume in thermal communication with the board and in thermal communication with at least one housing internal surface. The internal inter-surface structure configured to spread heat generated by the LED light source laterally along the internal inter-surface structure. The interior volume of the housing is substantially closed to external air flow. The housing external surface being an about smooth surface free of extruding heat sink fins or ridges, and having a shape sufficient to inhibit the trapping of water or dirt.

Abstract: Provided is a method and a system for multi-channel acoustic communication and sensing. For example, there is provided a system that includes a processor and a memory. The processor, when executing instructions from the memory, can perform certain operations. The operations can include classifying a motion detected near an ultrasonic receiver based on a Doppler shift observed in a signal measured by the ultrasonic receiver. The classifying can further include detecting a side lobe in a power spectrum of the signal to indicate that the motion has been detected.

Abstract: There is provided an ultrasonic bridge for ultrasonic-based wireless communication. For example, there is provided an ultrasonic bridge that includes a microphone configured to transduce an ultrasound into an analog voltage. The ultrasonic bridge further includes hardware configured to convert the analog voltage to digital information. The ultrasonic further includes a transceiver configured to send the digital information wirelessly to a remote device via one of an RF link and a light-based link.

Abstract: One or more light emitting diode diodes (LEDs) are attached to a printed circuit board. The attached LEDs are connectable with a power source via circuitry of the printed circuit board. An overmolding material is insert molded an over at least portions of the printed circuit board proximate to the LEDs to form a free standing high thermal conductivity material overmolding that covers at least portions of the printed circuit board proximate to the LEDs. The free standing high thermal conductivity material has a melting temperature greater than about 100° C. and has a thermal conductivity greater than or about 1 W/m·K. In some embodiments, the free standing high thermal conductivity material is a thermoplastic material.

Abstract: An LED signal module includes a circuit board with a plurality of LEDs, a corresponding plurality of lenses and an overmolded front element with a plurality of openings for receiving one of the plurality of lenses therethrough, and an exterior surface having a textured pattern thereon, with the front element configured to absorb the light from external sources.