Abstract: A disclosed power supply includes a power factor correction circuit including a switch, an inductor having a first terminal connected to an input voltage, and a second terminal connected to the switch, a storage capacitor and a load, a value of the inductor selected to operate the power factor correction circuit in discontinuous conduction mode, and a controller programmed to operate the switch to increase a power factor of the power supply. The switching frequency of the switch is periodically adjusted to reduce electromagnetic interference.

Abstract: A method of operating a lighting fixture comprising a plurality of discrete illumination sources of distinguishably different color coordinates comprises determining target color coordinates and luminous flux at which to operate the lighting fixture, determining input electrical power values for each of the plurality of discrete illumination sources that substantially produce the target color coordinates and luminous flux by referencing a calibration data lookup table having calibration data based on measurements of the plurality of discrete illumination sources, determining a color mixing zone defined by three distinguishably different color coordinates of the plurality of discrete illumination sources within which the target color coordinates lie according to the calibration data, determining luminous flux ratios for each of the plurality of discrete illumination sources having one of the three distinguishably different color coordinates defining the color mixing zone that substantially produces the target

Abstract: A method of operating a lighting fixture comprising a plurality of discrete illumination sources of distinguishably different color coordinates comprises determining target color coordinates and luminous flux at which to operate the lighting fixture, determining input electrical power values for each of the plurality of discrete illumination sources that substantially produce the target color coordinates and luminous flux by referencing a calibration data lookup table having calibration data based on measurements of the plurality of discrete illumination sources, determining a color mixing zone defined by three distinguishably different color coordinates of the plurality of discrete illumination sources within which the target color coordinates lie according to the calibration data, determining luminous flux ratios for each of the plurality of discrete illumination sources having one of the three distinguishably different color coordinates defining the color mixing zone that substantially produces the target

Abstract: An LED lighting element having an H-shaped housing. The housing, which may be an extruded housing, has a first section and a second section which is separated from the first section by a cross bar. A back plate is positioned opposite of the crossbar and is removably secured to the first section. A heat sink is located within the housing while a microcontroller and LED drive/control technology and integrated power supply contacts the heat sink and is attached to the back plate. An LED PC board that is electrically connected to the microcontroller and LED drive/control technology and integrated power supply is positioned in the second section and is attached to the housing. An end cap for the housing along with a method for constructing the lighting element are also disclosed.

Abstract: A method of operating a lighting fixture comprising a plurality of discrete illumination sources of distinguishably different color coordinates comprises determining target color coordinates and luminous flux at which to operate the lighting fixture, determining input electrical power values for each of the plurality of discrete illumination sources that substantially produce the target color coordinates and luminous flux by referencing a calibration data lookup table having calibration data based on measurements of the plurality of discrete illumination sources, determining a color mixing zone defined by three distinguishably different color coordinates of the plurality of discrete illumination sources within which the target color coordinates lie according to the calibration data, determining luminous flux ratios for each of the plurality of discrete illumination sources having one of the three distinguishably different color coordinates defining the color mixing zone that substantially produces the target

Abstract: Digitally-controlled power factor correction circuits, methods, and articles of manufacture are disclosed. A disclosed power supply comprises a power factor correction circuit including a switch, an inductor having a first terminal connected to an input voltage, and a second terminal connected to the switch, a storage capacitor and a load, a value of the inductor selected to operate the power factor correction circuit in discontinuous conduction mode, and a controller programmed to operate the switch to increase a power factor of the power supply.

Abstract: A method of operating a lighting fixture comprising a plurality of discrete illumination sources of distinguishably different color coordinates comprises determining target color coordinates and luminous flux at which to operate the lighting fixture, determining input electrical power values for each of the plurality of discrete illumination sources that substantially produce the target color coordinates and luminous flux by referencing a calibration data lookup table having calibration data based on measurements of the plurality of discrete illumination sources, determining a color mixing zone defined by three distinguishably different color coordinates of the plurality of discrete illumination sources within which the target color coordinates lie according to the calibration data, determining luminous flux ratios for each of the plurality of discrete illumination sources having one of the three distinguishably different color coordinates defining the color mixing zone that substantially produces the target

Abstract: An LED lighting element having an H-shaped housing. The housing, which may be an extruded housing, has a first section and a second section which is separated from the first section by a cross bar. A back plate is positioned opposite of the crossbar and is removably secured to the first section. A heat sink is located within the housing while a microcontroller and LED drive/control technology and integrated power supply contacts the heat sink and is attached to the back plate. An LED PC board that is electrically connected to the microcontroller and LED drive/control technology and integrated power supply is positioned in the second section and is attached to the housing. An end cap for the housing along with a method for constructing the lighting element are also disclosed.

Abstract: A method and associated illumination system are provided for illuminating an interior of a vehicle with a modular area illumination system, the modular area illumination system comprising: a system controller; and a plurality of an intelligent light module groups, each comprising: one or more light modules, each of which comprises a plurality of discrete illumination sources; a power supply; and an intelligent module group controller comprising: a) circuitry that controls the illumination levels of the illumination sources; and b) an interface for sending and receiving information; the method comprising: initializing each of the module groups to assign a unique address to respective module groups; sending a command, by the system controller, directly or indirectly, to each module group, the command being associated with a color and illumination value and setting; and receiving the command, by a module group, and adjusting a color and illumination of the illumination sources to the associated color.

Abstract: A light emitting diode (LED) unit is therefore provided, comprising: an LED module, comprising: a plurality of LEDs; LED drive circuitry that drives the LEDs; an LED control bus that carries LED illumination control information to the LED drive circuitry; and a housing that at least partially surrounds LED module components; a power supply and control module, comprising: a power supply that converts a first voltage level to a second voltage level; a microcontroller that receives illumination instructions from an external source; an LED drive controller that receives lighting instructions from the microcontroller and transmits LED illumination information to the LED drive circuitry; a housing that at least partially surrounds power supply and control module components; an interface that connects the LED drive controller to the LED control bus.