LED/phosphor-LED hybrid lighting systems
DCFirst Claim
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1. A lighting system for producing white light, the system comprising:
- at least one light emitting diode that emits red light; and
a phosphor-light emitting diode disposed adjacent to the at least one light emitting diode, wherein the phosphor-light emitting diode emits light of at least a third different color, the color being selected from the group consisting of amber and yellow-green.
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Abstract
A hybrid lighting system for producing white light including at least one light emitting diode and phosphor-light emitting diode. The hybrid lighting system exhibits improved performance over conventional LED lighting systems that use LEDs or phosphor-LEDs to produce white light. In particular, the hybrid system of the invention permits different lighting system performance parameters to be addressed and optimized as deemed important, by varying the color and number of the LEDs and/or the phosphor of the phosphor LED.
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Citations
12 Claims
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1. A lighting system for producing white light, the system comprising:
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at least one light emitting diode that emits red light; and
a phosphor-light emitting diode disposed adjacent to the at least one light emitting diode, wherein the phosphor-light emitting diode emits light of at least a third different color, the color being selected from the group consisting of amber and yellow-green. - View Dependent Claims (2, 3, 4, 11, 12)
wherein the phosphor-light emitting diode includes a blue light emitting diode that emits blue light and at least one phosphor that converts at least a portion of the blue light to one of a green light and a red light. -
3. The lighting system of claim 2, wherein the spectral wavelength of the red light emitted from the first light emitting diode is different from the spectral wavelength of the red light emitted from the third light emitting diode.
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4. The lighting system of claim 1, wherein the phosphor-light emitting diode includes a blue light emitting diode that emits blue light and at least one phosphor that converts at least a portion of the blue light to one of a green light and a red light.
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11. The lighting system of claim 1, further comprising at least a second light emitting diode which emits green light, wherein the phosphor-light emitting diode includes a blue light emitting diode that emits blue light and at least one phosphor that converts at least a portion of the blue light to one of a green light and a red light.
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12. The lighting system of claim 1, further comprising at least a second light emitting diode which emits green light.
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5. A lighting system for producing white light, the system comprising:
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at least one light emitting diode; and
a phosphor-light emitting diode that emits at least two different colors of light, disposed adjacent to the at least one light emitting diode, wherein the phosphor-light emitting diode emits at least three different colors of light, one of which three different colors is selected from the group consisting of amber and yellow-green.
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6. A lighting system for producing white light, the system comprising:
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at least two light emitting diodes; and
a phosphor-light emitting diode disposed adjacent to the at least one light emitting diode, wherein the phosphor-light emitting diode emits at least three different colors of light, one of which three different colors is selected from the group consisting of amber and yellow-green. - View Dependent Claims (7, 8, 9, 10)
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Specification