Light emitting apparatus generating white light by mixing of...

Details Light emitting apparatus generating white light by mixing of... Light emitting apparatus generating white light by mixing of...

2007-01-30

2007-01-30

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S287000, C315S291000

Reexamination Certificate

active

11158399

ABSTRACT:
A current of the same amount or in a constant ratio is applied to each of a combination of a blue light emitting diode having a small wavelength variation and a green light emitting diode having a large wavelength variation. With this, as an amount of applied current increases, an oscillation wavelength of the green light emitting diode having the large wavelength variation changes from a long wavelength side to a short wavelength side and mixes with a blue color of the blue light emitting diode having the small wavelength variation to gradually change chromaticity as a whole. When desired chromaticity is obtained, the amount of the current is fixed.

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