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US 6,577,073 B2Granted
Led lamp
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasanori Shimizu, Yoko Shimomura, Tetsushi Tamura, Hideo Nagai, Nobuyuki Matsui
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Abstract
An LED lamp includes blue and red LEDs and a phosphor. The blue LED produces an emission at a wavelength falling within a blue wavelength range. The red LED produces an emission at a wavelength falling within a red wavelength range. The phosphor is photoexcited by the emission of the blue LED to exhibit a luminescence having an emission spectrum in an intermediate wavelength range between the blue and red wavelength ranges.
Claims23
A LED lamp comprising:
- a blue LED for producing an emission at a wavelength falling within a blue wavelength range;
- a red LED for producing an emission at a wavelength falling within a red wavelength range;
- and
- a phosphor, which is photoexcited by the emission of the blue LED to exhibit a luminescence having an emission spectrum in an intermediate wavelength range between the blue and red wavelength ranges.
1 more element
Dependencies are inferred from the claim text.