Solid state illumination device
A solid state illumination device includes a semiconductor light emitter mounted on a base and surrounded by sidewalls, e.g., in a circular, elliptical, triangular, rectangular or other appropriate arrangement, to define a chamber. A top element, which may be reflective, may be coupled to the sidewalls to further define the chamber. The light produced by the semiconductor light emitter is emitted through the sidewalls of the chamber. The sidewalls and/or top element may include wavelength converting material, for example, as a plurality of dots on the surfaces. An adjustable wavelength converting element may be used within the chamber, with the adjustable wavelength converting element being configured to adjust the surface area that is exposed to the light emitted by the semiconductor light emitter in the chamber to alter an optical property of the chamber.
1. An apparatus comprising:
at least one semiconductor light emitter operable to emit light;
a light mixing chamber that includes a base element, at least one sidewall element and a top element, wherein the light mixing chamber is operable to receive light emitted by the at least one semiconductor light emitter;
a first wavelength converting material having a first color light conversion property, wherein the first wavelength converting material covers a first portion of the light mixing chamber, and wherein the first portion is physically separated from the at least one semiconductor light emitter;
a second wavelength converting material having a second color conversion property that is different than the first color conversion property, wherein the second wavelength converting material covers a second portion of the light mixing chamber that is different than the first portion, and wherein the second portion is physically separated from the at least one semiconductor light emitter.
2. The apparatus of claim 1 , wherein the first portion of the light mixing chamber is a first substitutable component and the second portion of the light mixing chamber is a second substitutable component.
3. The apparatus of claim 1 , wherein the first portion of the light mixing chamber comprises the at least one sidewall and the second portion of the light mixing chamber comprises the top element.
4. The apparatus of claim 1 , wherein light exits the light mixing chamber through the at least one sidewall.
5. The apparatus of claim 1 , wherein the second wavelength converting material is different than the first wavelength converting material.
6. An apparatus comprising:
at least one semiconductor light emitter operable to emit light;
a light mixing chamber that includes a base element, at least one sidewall element and a top element, wherein the light mixing chamber is operable to receive light emitted by the at least one semiconductor light emitter;
a first wavelength converting material having a first light conversion property, wherein the first wavelength converting material covers a first portion of the light mixing chamber, and wherein the first portion is physically separated from the at least one semiconductor light emitter;
a second wavelength converting material having a second light conversion property that is different than the first light conversion property, wherein the first wavelength converting material and the second wavelength converting material comprise different phosphors, wherein the second wavelength converting material covers a second portion of the light mixing chamber that is different than the first portion, and wherein the second portion is physically separated from the at least one semiconductor light emitter.
7. A method of producing an illumination device, the method comprising:
measuring a wavelength and light output of at least one light emitting diode;
selecting a first component having a first wavelength converting material with a first light conversion property based on the measured wavelength and light output of the at least one light emitting diode;
selecting a second component having a second wavelength converting material with a second light conversion property based on the measured wavelength and light output of the at least one light emitting diode;
assembling the at least one light emitting diode with the first component and the second component, the first component and the second component forming at least a portion of a light mixing chamber into which light from the at least one light emitting diode is emitted, wherein the first component and the second component are selected based on the measured wavelength and light output of the at least one light emitting diode to achieve a desired color point of light emitted from the light mixing chamber.
8. The method of claim 7 , wherein the first component comprises at least one sidewall element of the light mixing chamber and the second component comprises a top element of the light mixing chamber.
9. The method of claim 7 , wherein the first component and the second component are physically separated from the at least one light emitting diode.
10. The method of claim 7 , wherein the first wavelength converting material and the second wavelength converting material comprise different phosphors.
11. The method of claim 7 , wherein the first component having the first wavelength converting material is selected for at least one of the wavelength converting material, concentration, coverage factor, and thickness to produce the first light conversion property and the second component having the second wavelength converting material is selected for at least one of the wavelength converting material, concentration, coverage factor, and thickness to produce the second light conversion property.
12. The method of claim 7 , wherein the first light conversion property is a first color conversion property and the second light conversion property is a second color conversion property that is different than the first color conversion property.
13. The method of claim 7 , the second wavelength converting material is different than the first wavelength converting material.
14. An apparatus comprising:
at least one semiconductor light emitter operable to emit light;
a light mixing chamber that includes a base element, at least one sidewall element and a top element, wherein the light mixing chamber is operable to receive light emitted by the at least one semiconductor light emitter;
a first selectable component of the light mixing chamber, the first selectable component having a first wavelength converting material with a first light conversion property, the first selectable component is selectable based on at least one of the concentration, coverage factor, and thickness of the first wavelength converting material;
a second selectable component of the light mixing chamber, the second selectable component is physically separated from the first selectable component, the second selectable component having a second wavelength converting material with a second light conversion property, the second selectable component is selectable based on at least one of the concentration, coverage factor, and thickness of the second wavelength converting material;
wherein the first selectable component and the second selectable component convert the light emitted by the at least one semiconductor light emitter to produce light with a desired color point.
15. The apparatus of claim 14 , wherein the first wavelength converting material and the second wavelength converting material comprise different phosphors.
16. The apparatus of claim 14 , wherein the first selectable component comprises the at least one sidewall and the second selectable component comprises the top element.
17. The apparatus of claim 14 , wherein light exits the light mixing chamber through the at least one sidewall element.
18. The apparatus of claim 14 , wherein the first light conversion property is a first color conversion property and the second light conversion property is a second color conversion property that is different than the first color conversion property.
19. The apparatus of claim 14 , wherein the second wavelength converting material is different than the first wavelength converting material.