Abstract: Power factor correction and driver circuits and stages are described. More particularly, power factor correction circuits are described that utilize an auxiliary inductor winding for power regulation. Driver circuits configured for electrical loads such as series arrangements of light emitting diodes are also described. An exemplary embodiment of a driver circuit can implement a comparator and/or a voltage regulator to allow for improved output current uniformity for high-voltage applications and loads, such as series configurations of LEDs. Embodiments of PFC stages and driver stages can be combined for use as a power supply, and may be configured on a common circuit board. Power factor correction and driver circuits can be combined with one or more lighting elements as a lighting apparatus.

Abstract: A reflector assembly for a lighting apparatus, the reflector assembly comprising two or more reflector modules configured for associating with one or more light sources, each reflector module comprising one or more reflectors for being located adjacent to a light source when the reflector module is associated with the one or more light sources, the one or more reflectors configured to reflect light from the adjacent light source. The reflector modules may further comprising a cover plate defining a plurality of light source apertures for allowing a light source to protrude through the cover plate, at least a first of the one or more light source apertures disposed adjacent to an overhead reflector and at least a second of the one or more light source apertures disposed adjacent to a lateral reflector.

Abstract: A lighting apparatus having a base member and a directional member are shown and described. The base member includes a first surface having a plurality of reflective elements extending therefrom. The base member also including a plurality of openings arranged in a pattern. Each openings is configured to receive a respective light source. The directional member has a portion of a reflective surface positioned relative to at least one opening to reflect light radiating from a lighting source disposed within the opening towards a portion of at least one of the reflective elements extending from the base member.

Abstract: A light fixture useful in the lighting of parking garages, including a base, a reflector element and at least one light-emitting lamp. The reflector element includes a reflector portion that extends vertical from the base to a distal edge that extends beyond the lamp. The extending reflector portions include a plurality of planer panels positioned in a plane at an angle that faces toward the lamp. A portion of the emitted light is reflected by the extending reflector portion in the opposed horizontal direction away from the fixture at a reflected angle from nadir that is greater than the emitted angle. The light fixture provides a uniform lighting pattern that allows for using fewer of the light fixtures, by projecting or reflecting emitted light horizontally at very high angles from nadir, and delivering more light to areas laterally remote from the fixture, and potentially using less energy.

Abstract: A device and method for retrofitting a light fixture from use with a lamp socket that employs an incandescent or metal halide lamp, to use with another lamp assembly. The lamp fixture has a collar with a base and an annular outer wall extending out from the base. The LED lamp device includes a neck base having an annular outer wall having a shaped outside surface that is placed into direct surface contact with the inner surface of the annular outer wall of the collar, to establish an effective heat-transferring interface. The shaped outer surface of the neck base provides proper fitting of the LED lamp device into the lighting fixture, and provides a heat-transferring interface over substantially all of the outer surface of the neck base, to dissipate heat away from the LED module. Aluminum material provides high thermal conductivity, light weight, availability, and low cost.

Abstract: A lighting apparatus having a base member and a directional member are shown and described. The base member includes a first surface having a plurality of reflective elements extending therefrom. The base member also including a plurality of openings arranged in a pattern. Each openings is configured to receive a respective light source. The directional member has a portion of a reflective surface positioned relative to at least one opening to reflect light radiating from a lighting source disposed within the opening towards a portion of at least one of the reflective elements extending from the base member.

Abstract: Disclosed are lighting techniques, including systems, apparatus, and methods, that employ optical transmission of two-dimensional control signals to manipulate lighting elements. The lighting apparatus can include a projector with an IR LED array to wirelessly transmit pixel information onto a target space. The pixel information controls lighting elements within the target space. The two-dimensional control signals can includes subareas corresponding to lighting elements in a control array. The lighting elements can be lights of desired wavelengths including infrared and/or visible wavelengths. LEDs can be used as light sources in exemplary embodiments.

Abstract: Disclosed are lighting techniques, including systems, apparatus, and methods, that employ optical transmission of two-dimensional control signals to manipulate lighting elements. The lighting apparatus can include a projector with an IR LED array to wirelessly transmit pixel information onto a target space. The pixel information controls lighting elements within the target space. The two-dimensional control signals can includes subareas corresponding to lighting elements in a control array. The lighting elements can be lights of desired wavelengths including infrared and/or visible wavelengths. LEDs can be used as light sources in exemplary embodiments.

Abstract: Screens for three-dimensional (3D) viewing are described that can include a plurality of light sources used as a video screen in conjunction with a switching polarization filter or panel. The polarization panel can be used to synchronize the left and right views interleaved on the screen. Separate left and right video signals can be interleaved into a single continuous digital video signal, for example a DVI signal, which can be displayed by the video screen. By switching the polarization panels in front of the video screen in synchronization with the interleaved data, the images can be directed to the left and right eye of a viewer. A processor can be used to accomplish the interleaving of the signals while providing the necessary synchronization signal for the polarizing screen. Related methods are also described. The light sources can include LEDs, plasma screen, LCD screen, and spatially discrete sub groups of such.

Abstract: Lighting apparatus and structures are described that are adapted for installation in housings. The housings can be pre-existing ones, such as those installed for high-intensity discharge (HID) or other types of lighting. The lighting apparatus can include a light unit (e.g., luminaire) with desired type of light source(s), for example, an array of LEDs. The apparatus can include structures that are adapted for use with the housings such that installation of a light unit requires a minimum of user effort and time. Such lighting apparatus, and related installation methods, can accordingly provide for high-efficiency lighting. Related assembly and installation techniques are also described.

Abstract: LED lighting fixtures, or luminaires, related components, driver circuit, methods, and software/firmware are described can provide for among other things, ambient environment sensing, thermal self-monitoring, sensor-based power management, communications, and/or programmability. Driver and lighting circuits configured for electrical loads such as series arrangements of light emitting diodes are also described. Embodiments of PFC stages and driver stages can be combined for use as a power supply, and may be configured on a common circuit board. Power factor correction and driver circuits can be combined with one or more lighting elements as a lighting apparatus. Methods of hysteretic power factor correction start-up are also described.

Abstract: A switched preconditioner circuit is provided at the power input end of a light source to effectively drop the voltage of the light source to zero volts whenever the light source is required to be in an OFF state thereby eliminating the problem of unwanted current through the light source. The preconditioner circuit may include a terminal connected to a first power potential, a terminal connected to a power node at the power input end of the light source, and an input to receive a preconditioner control signal to place the preconditioner circuit in one of an ON state and an OFF state. The preconditioner circuit supplies the voltage to the power node in its ON state and effectively eliminates the voltage to the power node in its OFF state.

Abstract: A device and method for retrofitting a light fixture from use with a lamp socket that employs a conventional incandescent or metal halide lamp, to use with a light emitting diode (LED)-based lamp assembly. The lamp fixture has a collar with a base and an annular outer wall extending out from the base. The LED lamp device includes a neck base having an annular outer wall having a shaped outside surface that is placed into direct surface contact with the inner surface of the annular outer wall of the collar, to establish an effective heat-transferring interface. The shaped outer surface of the neck base provides proper fitting of the LED lamp device into the lighting fixture, and provides a heat-transferring interface over substantially all of the outer surface of the neck base, to dissipate heat away from the LED module. Aluminum material provides high thermal conductivity, light weight, availability, and low cost.

Abstract: Systems and devices are disclosed that can be aimed by external adjustment devices/features/means without the need to open the sealed LED module. Heat from the LEDs and/or LED mounting assembly can be transferred to the outside air while the module is tilted, e.g., up to 15 degrees, or more, from vertical. Additionally, the modular structure of the inground LED light can allow for upgrade/renewal of associated electronics with only minor disassembly. Moreover, the thermal dissipation/management afforded by the designs of embodiments can allow for an increase of the LED useful service life. The sealing of the inground light unit can preclude the chance of an end user (e.g., service technician) from causing the unit to leak and thereby cause premature failure.

Abstract: A switched preconditioner circuit is provided at the power input end of a light source to effectively drop the voltage of the light source to zero volts whenever the light source is required to be in an OFF state thereby eliminating the problem of unwanted current through the light source. The preconditioner circuit may include a terminal connected to a first power potential, a terminal connected to a power node at the power input end of the light source, and an input to receive a preconditioner control signal to place the preconditioner circuit in one of an ON state and an OFF state. The preconditioner circuit supplies the voltage to the power node in its ON state and effectively eliminates the voltage to the power node in its OFF state.