SOLID STATE LIGHT EMITTER WITH PHOSPHORS DISPERSED IN A LIQUID OR GAS FOR PRODUCING HIGH CRI WHITE LIGHT
First Claim
1. A solid state light emitting device, comprising:
- a semiconductor chip for producing electromagnetic energy;
a package enclosing the semiconductor chip and configured to allow emission of light as an output of the device; and
a plurality of semiconductor nanophosphors dispersed in a light transmissive liquid or gas contained within the package, each of the semiconductor nanophosphors having a respective absorption spectrum encompassing an emission spectrum of the semiconductor chip for re-emitting visible light of a different spectrum, for together producing visible light in the output of the device when the semiconductor nanophosphors are excited by electromagnetic energy from the semiconductor chip,wherein;
(a) the visible light output produced during the excitation of the semiconductor nanophosphors is at least substantially white;
(b) the visible light output produced during the excitation of the semiconductor nanophosphors has a color rendering index (CRI) of 75 or higher; and
(c) the visible light output produced during the excitation of the semiconductor nanophosphors has a color temperature in one of the following ranges;
2,725±
145°
Kelvin;
3,045±
175°
Kelvin;
3,465±
245°
Kelvin;
3,985±
275°
Kelvin;
4,503±
243°
Kelvin;
5,028±
283°
Kelvin;
5,665±
355°
Kelvin; and
6,530±
510°
Kelvin.
2 Assignments
0 Petitions
Accused Products
Abstract
A solid state white light emitting device includes a semiconductor chip for producing electromagnetic energy and may additionally include a reflector forming an optical integrating cavity. Phosphors, such as semiconductor nanophosphors dispersed in a light transmissive liquid or gas material, within the chip packaging of the solid state device itself, are excitable by the energy from the chip. The device produces output light that is at least substantially white and has a color rendering index (CRI) of 75 or higher. The white light output of the device may exhibit color temperature in one of the following specific ranges along the black body curve: 2,725±145° Kelvin; 3,045±175° Kelvin; 3,465±245° Kelvin; 3,985±275° Kelvin; 4,503±243° Kelvin; 5,028±283° Kelvin; 5,665±355° Kelvin; and 6,530±510° Kelvin.
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Citations
24 Claims
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1. A solid state light emitting device, comprising:
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a semiconductor chip for producing electromagnetic energy; a package enclosing the semiconductor chip and configured to allow emission of light as an output of the device; and a plurality of semiconductor nanophosphors dispersed in a light transmissive liquid or gas contained within the package, each of the semiconductor nanophosphors having a respective absorption spectrum encompassing an emission spectrum of the semiconductor chip for re-emitting visible light of a different spectrum, for together producing visible light in the output of the device when the semiconductor nanophosphors are excited by electromagnetic energy from the semiconductor chip, wherein; (a) the visible light output produced during the excitation of the semiconductor nanophosphors is at least substantially white; (b) the visible light output produced during the excitation of the semiconductor nanophosphors has a color rendering index (CRI) of 75 or higher; and (c) the visible light output produced during the excitation of the semiconductor nanophosphors has a color temperature in one of the following ranges; 2,725±
145°
Kelvin;3,045±
175°
Kelvin;3,465±
245°
Kelvin;3,985±
275°
Kelvin;4,503±
243°
Kelvin;5,028±
283°
Kelvin;5,665±
355°
Kelvin; and6,530±
510°
Kelvin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A solid state light emitting device, comprising:
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a semiconductor chip for producing electromagnetic energy; a package enclosing the semiconductor chip; at least one reflective surface forming an optical integrating cavity within the package, wherein the semiconductor chip is positioned and oriented so that at least substantially all direct emissions from the semiconductor chip reflect at least once within the cavity; a light transmissive gas or liquid material and a containment member configured to contain the material within the package such that the light transmissive material fills at least a substantial portion of the optical integrating cavity, a surface of a containment member forming an optical aperture to allow emission of light from the cavity for a light output of the device; and a plurality of phosphors dispersed in the light transmissive gas or liquid material, each of the phosphors having a respective absorption spectrum encompassing an emission spectrum of the semiconductor chip for re-emitting visible light of a different spectrum, for together producing visible light in the output of the device when the phosphors are excited by electromagnetic energy from the semiconductor chip, wherein; (a) the visible light output produced during the excitation of the phosphors is at least substantially white; and (b) the visible light output produced during the excitation of the phosphors has a color rendering index (CRI) of 75 or higher. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification