US 2010/0148191 A1Published application

High Luminous Flux Warm White Solid State Lighting Device

AssigneeLEDnovation, Inc.

InventorsJinhui Zhai, Israel Morejon, Thong Bui

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Abstract

A high luminous flux warm white solid state lighting device with a high color rendering is disclosed. The device comprising two groups of semiconductor light emitting components to emit and excite four narrow-band spectrums of lights at high luminous efficacy, wherein the semiconductor light emitting components are directly mounted on a thermal effective dissipation member; a mixing cavity for blending the multi-spectrum of lights; a back-transferred light recycling member deposited on top of an LED driver and around the semiconductor light emitters; and a diffusive member to diffuse the mixture of output light from the solid state lighting device. The solid state lighting device produces a warm white light with luminous efficacy at least 80 lumens per watt and a color rendering index at least 85 for any lighting application.

Claims20

Dependent claims

A solid state lighting device comprising:

a first group of semiconductor light emitting components emitting a first spectrum of primary light;
a first wavelength down-conversion layer on top of said first group of semiconductor light emitting components exciting a second spectrum of yellow light having a narrow bandwidth;
a second wavelength down-conversion layer on top of said first wavelength down-conversion layer exciting a third spectrum of light having a peak wavelength between said first spectrum of primary light and said second spectrum of yellow light;
a second group of semiconductor light emitting components emitting a fourth spectrum of light having a peak wavelength longer than said first spectrum of primary light and said second spectrum of yellow light;
a color mixing cavity having a diffusive output window mixing said first spectrum of primary light, said second spectrum of yellow light, said third spectrum of light and said fourth spectrum of light;
a light recycling reflector member around an interior wall of said solid state lighting device, said light recycling reflector member surrounding said first group of semiconductor light emitting components and said second group of semiconductor light emitting components;
and
a power line electrically connected to said first group of semiconductor light emitting components and said second group of semiconductor light emitting components.

5 more elements

A solid state lighting device comprising:

a substrate;
a first group of semiconductor light emitting components being packaged on a single light emitting device on said substrate, said first group of semiconductor light emitting components emitting a first spectrum of primary light;
a first wavelength down-conversion layer covering said first group of semiconductor light emitting components and covering said substrate, said first wavelength down-conversion layer exciting a second spectrum of yellow light having a narrow bandwidth with full width at half maximum less than 75 nm;
a second wavelength down-conversion layer on top of said first wavelength down-conversion layer exciting a third spectrum of light having a peak wavelength between said first spectrum of primary light and said second spectrum of yellow light;
a second group of semiconductor light emitting components emitting a fourth spectrum of light having a peak wavelength longer than said first spectrum of primary light, said second spectrum of yellow light and said third spectrum of light;
a color mixing cavity having a diffusive output window mixing said first spectrum of primary light, said second spectrum of yellow light, said third spectrum of light and said fourth spectrum of light;
a light recycling reflector member;
and
a power line electrically connected to said first group of semiconductor light emitting components and said second group of semiconductor light emitting components.

6 more elements

Dependencies are inferred from the claim text.