Light emitting diode illumination system
First Claim
1. A multicolor Light Emitting Diode (LED) based lighting element for constituting a white light, comprising:
- a LED light source, wherein the LED light source emits LED light consisting of one or more selected color;
a fluorescent dye positioned to receive the LED light, wherein the LED light passing through the fluorescent dye emits fluorescent light of one or more colors other than the selected color, wherein the fluorescent dye is generally transparent to the fluorescent light emitted; and
wherein the fluorescent light is emitted in a forward direction and in a backward direction; and
an optical element positioned between the LED light source and the fluorescent dye to redirect fluorescent light from the backward direction into the forward direction, wherein the fluorescent light emitted constitutes white light.
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Accused Products
Abstract
In various embodiments of the invention, a unique construction for Light Emitting Diodes (LEDs) with prisms and dyes and other optical elements can be used to generate a variety of light sources with different emission spectra. In an embodiment of the invention, reflected light can be redirected outward. In another embodiment of the invention, a white LED based light uses a blue LED and associated optics elements, including a high index glass prism or rod, a layer of dyed florescent polymer and an extraction-enhancing optical element or lens, such that all of the light emitted from with the dye layer can be directed outward.
266 Citations
21 Claims
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1. A multicolor Light Emitting Diode (LED) based lighting element for constituting a white light, comprising:
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a LED light source, wherein the LED light source emits LED light consisting of one or more selected color; a fluorescent dye positioned to receive the LED light, wherein the LED light passing through the fluorescent dye emits fluorescent light of one or more colors other than the selected color, wherein the fluorescent dye is generally transparent to the fluorescent light emitted; and wherein the fluorescent light is emitted in a forward direction and in a backward direction; and an optical element positioned between the LED light source and the fluorescent dye to redirect fluorescent light from the backward direction into the forward direction, wherein the fluorescent light emitted constitutes white light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of generating a Red Green Blue (RGB) lighting system using a Light Emitting Diode (LED) based lighting element, comprising the steps of:
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applying a potential to a LED to generate LED light in at least a selected color; positioning a fluorescent dye to receive the LED light, wherein the LED light passing through the fluorescent dye emits fluorescent light of one or more colors other than the selected color, wherein the fluorescent dye is generally transparent to the fluorescent light emitted; and wherein the fluorescent light is being emitted in the forward direction and in a backward direction; and redirecting the backward emitted fluorescent light in the forward direction via an optical element positioned between the LED light source and the fluorescent dye, wherein the emitted fluorescent light comprises RGB light. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A multicolor Light Emitting Diode (LED) based lighting element for constituting a white light, comprising:
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a LED light source, wherein the LED light source emits LED light consisting of one or more selected color; a fluorescent dye positioned to receive the LED light, wherein the LED light passing through the fluorescent dye emits fluorescent light of one or more colors other than the selected color, wherein the fluorescent dye is generally transparent to the fluorescent light emitted, and wherein there is a space between the fluorescent dye and the LED; wherein the fluorescent light is emitted in a forward direction and in a backward direction; and an optical element positioned in the space between the LED light source and the fluorescent dye to redirect fluorescent light from the backward direction into the forward direction, wherein the fluorescent light emitted constitutes white light.
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21. A method of generating a Red Green Blue (RGB) lighting system using a Light Emitting Diode (LED) based lighting element, comprising the steps of:
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applying a potential to a LED to generate LED light in at least a selected color; positioning a fluorescent dye to receive the LED light, wherein the LED light passing through the fluorescent dye emits fluorescent light of one or more colors other than the selected color, wherein the fluorescent dye is generally transparent to the fluorescent light emitted, and wherein there is a space between the fluorescent dye and the LED; wherein the fluorescent light is being emitted in the forward direction and in a backward direction; and redirecting the backward emitted fluorescent light in the forward direction via an optical element positioned in the space between the LED light source and the fluorescent dye, wherein the emitted fluorescent light comprises RGB light.
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Specification