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US 12,666,769 B2Granted
System and method for selected pump LEDs with multiple phosphors
AssigneeKorrus, Inc.
InventorsAurelien J.F. David, Arpan Chakraborty, Michael Ragan Krames, Troy Trottier
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Abstract
An LED pump light with multiple phosphors is described. LEDs emitting radiation at violet and/or ultraviolet wavelengths are used to pump phosphor materials that emit other colors. The LEDs operating in different wavelength ranges are arranged to reduce light re-absorption and improve light output efficiency.
Claims8
A light emitting system for emitting white light, said light emitting system comprising:
- light emitting diodes (LEDs) comprising at least
- a first set of LEDs comprising at least one first LED and emitting a first light having a first peak wavelength in a range 405-430 nm,
- a second set of LEDs comprising at least one second LED and emitting a second light having a second peak wavelength which is longer than the first peak wavelength;
- and
- wavelength-converting materials, configured to substantially absorb a portion of light from said LEDs and convert it to a third light and a fourth light;
- wherein said white light comprises at least a portion of said first, second, third, and fourth lights.
3 more elements
Dependencies are inferred from the claim text.