Illumination device including a color selecting panel for recycling unwanted light
First Claim
1. An illumination device comprising:
- At least one light emitting diode that produces light having a first range of wavelengths;
at least one wavelength converting element converting at least a portion of the light having the first range of wavelengths to light having a second range of wavelengths; and
a color selecting panel that selects a portion of the first and/or the second range of wavelength as an illumination light and selects a portion from the first and/or second range of wavelengths as a recycled light, wherein the selection of the illumination light and the recycled light is in at least one of the spatial domain of the panel and the temporal domain of at least two selections.
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Accused Products
Abstract
An illumination source includes at least one light emitting diode, e.g., in array of LEDs that produce short wavelength light. One or more wavelength converting elements, such as phosphor elements, convert at least a portion of the short wavelength light from the LED(s) to longer wavelengths, such as Red and Green. A dichroic element positioned between the LED(s) and the wavelength converting element(s) transmits the light from the LED(s) and reflects the longer wavelengths from the wavelength converting element(s). A color selection panel selects the colors of light to be produced by the illumination device and to be recycled for another opportunity to be converted by the wavelength converting element(s) or to be reflected by the dichroic element. The color selection panel may operate in one or both of the spatial domain and the temporal domain.
37 Citations
21 Claims
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1. An illumination device comprising:
At least one light emitting diode that produces light having a first range of wavelengths;
at least one wavelength converting element converting at least a portion of the light having the first range of wavelengths to light having a second range of wavelengths; and
a color selecting panel that selects a portion of the first and/or the second range of wavelength as an illumination light and selects a portion from the first and/or second range of wavelengths as a recycled light, wherein the selection of the illumination light and the recycled light is in at least one of the spatial domain of the panel and the temporal domain of at least two selections.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of producing light from an illumination source, the method comprising:
- generating Blue light from at least one light emitting diode;
converting at least a portion of the Blue light from the at least one light emitting diode to produce Red light and Green light; and
selecting colors of light to produce with a color selecting panel wherein the color selecting panel selects a portion from the Blue, Red or Green light as an illumination light and selects a portion from the Blue, Red or Green light as a recycled light, wherein the selection of the illumination light and the recycled light is in at least one of the spatial domain of the panel and the temporal domain of at least two selections. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
- generating Blue light from at least one light emitting diode;
Specification