Solid-state light emitting devices with photoluminescence wavelength conversion

摘要

A solid-state light emitting device comprises a light transmissive thermally conductive circuit board; an array of solid-state light emitters (LEDs) mounted on, and electrically connected to, at least one face of the circuit board; and a photoluminescence wavelength conversion component. The wavelength conversion component comprises a mixture of particles of at least one photoluminescence material (phosphor) and particles of a light reflective material. The emission product of the device comprises the combined light generated by the LEDs and the photoluminescence material. The wavelength conversion component can comprise a layer of the phosphor material and particles of a light reflective material applied directly to the array of LEDs in the form of an encapsulant. Alternatively the photoluminescence component is a separate component and remote to the array of LEDs such as tubular component that surrounds the LEDs.

主权项

1. A light emitting device comprising:
a light transmissive circuit board; a first array of solid-state light emitters mounted on, and electrically connected to, a first face of the light transmissive circuit board, wherein the first array of solid-state light emitters are operable to generate excitation light; and a photoluminescence wavelength conversion component comprising a mixture of particles of at least one photoluminescence material and particles of a light reflective material, wherein the photoluminescence wavelength conversion component is configured such that in operation a portion of the excitation light generated by the first array solid-state light emitter is emitted through the photoluminescence wavelength conversion component to contribute to a final visible emission product.