Abstract: A method of manufacturing a light source includes providing a substrate with electronic circuitry to drive light emitting diodes (LEDs); coupling a plurality of LEDs to the electronic circuitry on the substrate, the LEDs with more than one color types; and attaching a mixing barrel around the plurality of LEDs over the substrate, the mixing barrel with a reflective internal wall.

Abstract: An electrical circuit is disclosed. The electrical circuit comprises a plurality of color strings coupled in series, where each color string has at least one lamp, preferably a light emitting diode. The color strings may be of dissimilar length and may contain light emitting diodes of different colors. In one embodiment, a switch coupled in parallel with one of the color strings is configured to shunt power away from the color string to a power supply. In another embodiment, a switch coupled in parallel with one of the color strings is configured to shunt power away from the color string to one or more other color strings. In several embodiments, passive storage elements are utilized to store shunted power. In another embodiment, a current injector is configured to inject or remove current from a node adjacent to a color string. In several embodiments the invention is implemented as a light emitting diode driver integrated circuit or chip.

Abstract: The tunable color mixing system includes a mixing barrel that captures light from multiple light emitting diodes emitting at different colors, mixes the light, and outputs the light with a narrow beam angle from a small area. The array of LEDs in the system is thermally coupled to a heat conductor via thermal pads. A flexible printed circuit is electrically connected to the LEDs to supply and fine-tune the electrical power. The array includes LEDs of at least three emitting colors to achieve an output light having a high color rendering index, tunable to a wide range of correlated color temperatures.

Abstract: A lighting system is described. The lighting system includes a lamp and a first container including a first phase change material thermally connected to the lamp. Heat generated by the lamp during operation is conducted to the first phase change material. The system also includes a second container including a second phase change material thermally connected to the lamp. Heat generated by the lamp during operation is also conducted to the second phase change material, and the second phase change material has a transition point temperature lower than the transition point temperature of the first phase change material of the first container to account for a temperature drop between the second container and the first container. The lighting system also includes a temperature sensor for reducing lamp power if the lamp becomes too hot, and a mounting bracket which may also conduct heat away from the lamp.

Abstract: Systems and methods for using a dual-path fluid routing system that uses a flow restriction device to enhance temperature and pressure control of fluid are provided. Systems and methods for using a setpoint pressure control system to accurately control the setpoint pressure of a regulator are also provided.