JP2015144261A5 - - Google Patents

Claims (20)

A light emitting device,
A light transmitting base plate,
It is placed on a first surface of the light transmitting base plate, a first array of operable solid-state light emitters to generate excitation Okoshiko,
A photoluminescence wavelength converting component comprising a mixture of particles of at least one photoluminescent material and particles of light reflecting material, wherein in operation the excitation light generated by the solid state light emitter of the first array A photoluminescent wavelength converting component, wherein a portion of the photoluminescent wavelength converting component is configured to be emitted through the photoluminescent wavelength converting component and contribute to a final visible luminescent product. Placed on the second surface of the light transmitting base plate, further comprising a second array of solid state light emitters, light emitting device according to claim 1. The transmission base plate has at least 50% transmittance for the visible light emitting device of claim 1. The transmission base plate is thermally conductive, light-emitting device according to claim 1. At least a portion of the transmission base plate, magnesium oxide, sapphire, aluminum oxide, quartz glass, is selected from the group consisting of aluminum nitride, and diamond, the light emitting device of claim 4.   2. The photoluminescent component of claim 1, comprising a mixture of the at least one photoluminescent material and particles of the light reflecting material applied directly to the array or each array of solid state light emitters. Light emitting device.   The light emitting device of claim 1, wherein the photoluminescent component is remote to the array or each array of solid state light emitters.   The light emitting device of claim 7, wherein a surface of the wavelength converting component is positionable at a distance of at least 5 mm from the plurality of solid state light emitters.   The light emitting device of claim 7, wherein the wavelength converting component comprises a substantially cylindrical tube.   The light-emitting device according to claim 1, wherein the light reflecting material has a particle size in a range selected from the group consisting of 0.01 μm to 10 μm, 0.01 μm to 1 μm, and 0.1 μm to 1 μm.   The weight filling percentage of the light reflecting material relative to the at least one photoluminescent material is 0.01% to 10%, 0.01% to 1%, 0.1% to 1%, and 0.5% to 1%. The light emitting device according to claim 1, wherein the light emitting device is in a range selected from the group consisting of:   The light emitting device of claim 1, wherein the light reflecting material is selected from the group consisting of magnesium oxide, titanium dioxide, barium sulfate, and combinations thereof. The wavelength converting component is provided as at least one layer , a mixture of a photoluminescent material and a light reflecting material, and a photoluminescent material and a light reflecting material distributed uniformly throughout the volume of the light transmissive substrate. 2. A light emitting device according to claim 1 selected from the group consisting of mixtures with materials.   The particles of the light reflecting material have a particle size such that the particles scatter relatively more excitation light generated by the solid state light emitter than light generated by the at least one phosphor material. The corresponding light emitting device according to claim 1.   The light emitting device of claim 1, further comprising a light diffusing layer adjacent to the photoluminescence wavelength converting component.   The light diffusing layer corresponds to a particle size such that the particles scatter relatively more excitation light generated by the solid state light emitter than light generated by the at least one photoluminescent material. The light emitting device of claim 15 comprising particles of light reflecting material.   The light emitting device according to claim 16, wherein the light reflecting material has a particle size in a range of 100 nm to 150 nm. The light emitting device of claim 1, wherein the first array of solid state light emitters is electrically connected to the first surface of the light transmissive substrate. The light emitting device of claim 2, wherein the second array of solid state light emitters is electrically connected to the second surface of the light transmissive substrate.   The light emitting device according to claim 1, wherein the light transmissive substrate comprises a light transmissive circuit board.