Abstract: A method of forming a light emitting diode (LED) for a solid state light engine includes depositing a layer of tacky resin onto a die portion of the LED, adhering a plurality of phosphor particles to the tacky resin, and encapsulating the layer of tacky resin and the plurality of phosphor particles in another layer of resin.

Abstract: A solid state light engine includes a bridge rectifier having a rectified output. At least one light emitting diode (LED) is connected to the bridge rectifier, the at least one LED including a die portion, a layer of phosphor free resin positioned upon the die portion, and a plurality of phosphor particles adhered to the layer of phosphor free resin. A pair of AC power input terminals are electrically connected to the input of the bridge rectifier for use in coupling the bridge rectifier to an AC power source. A pair of DC power input terminals are connected to the rectified output of the bridge rectifier for use in coupling the bridge rectifier to a circuit productive of a DC voltage at the pair of DC power terminals. The layer of phosphor free resin includes a polymeric resin.

Abstract: A solid state light engine includes a bridge rectifier having a rectified output. At least one light emitting diode (LED) is connected to the bridge rectifier, the at least one LED including a die portion, a layer of phosphor free resin positioned upon the die portion, and a plurality of phosphor particles adhered to the layer of phosphor free resin. A pair of AC power input terminals are electrically connected to the input of the bridge rectifier for use in coupling the bridge rectifier to an AC power source. A pair of DC power input terminals are connected to the rectified output of the bridge rectifier for use in coupling the bridge rectifier to a circuit productive of a DC voltage at the pair of DC power terminals. The layer of phosphor free resin includes a polymeric resin.

Abstract: A solid-state light engine comprised of light emitting diodes (LEDs) configured into a bridge rectifier with a current limiting module coupled to the LED bridge rectifier. The light engine may be packaged for high temperature operation. Optionally, the LEDs comprise wavelength-converting phosphors with a persistence that is a multiple of the peak to peak current period, to smooth and mask ripple frequency pulsation of emitted light.

Abstract: A display backlight assembly providing improved optical coupling between a solid state light source and a display optical light guide. The assembly includes an optical coupler to couple the solid state light source and display optical light guide together. In addition, the optical coupler may include a light mixing element for improved mixing of the multi-colored or mono-chromatic light produced by the solid state light source.

Abstract: The present invention relates to regulated power supplies or ballasts integrated with an LED light source. The invention provides a power factor correction scheme producing a greater circuit power factor and improved frequency spectrum characteristics, in which a voltage corresponding to the instantaneous inductor current is sampled and compared to a scaled sample of the rectified input AC line voltage. The line voltage sample modulates the inductor peak charge current in the envelope of the rectified AC voltage waveform. This drives the LED output voltage at a frequency of twice the input line voltage frequency, such that no flicker is perceived in the light output because the persistence in LED phosphor assists in averaging the flux output.

Abstract: A solid-state light engine comprised of light emitting diodes (LEDs) configured into a bridge rectifier with a current limiting module coupled to the LED bridge rectifier. The light engine may be packaged for high temperature operation. Optionally, the LEDs comprise wavelength-converting phosphors with a persistence that is a multiple of the peak to peak current period, to smooth and mask ripple frequency pulsation of emitted light.