Light-emitting diode illumination source

Active solid-state devices (e.g. – transistors – solid-state diode – Organic semiconductor material

Reexamination Certificate

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Details

C257S079000, C257S098000, C257S103000

Reexamination Certificate

active

07737434

ABSTRACT:
The invention provides light emitting diode illumination source having excellent properties as an illumination source such as a flat spectral distribution in the wavelength region from green to red and a sufficient emission intensity in the red region, comprising a light emitting diode having multiple peaks with a half-value width of 20 nm or more within a range from 480 to 700 nm in a spectral distribution, wherein the minimum of the intensities of the valleys between the peaks in the wavelength range from 480 to 700 nm is 65% or more of the maximum peak intensity in the same range, and an illuminator and a backlight for a liquid crystal display using the illumination source.

REFERENCES:
patent: 6869697 (2005-03-01), Heuer et al.
patent: 7306856 (2007-12-01), Igarashi et al.
patent: 1 398 363 (2004-03-01), None
Sergey Lamanasky et al., “Synthesis and Characterization of Phosphorescent Cyclometalalated Iridium Complexes.”, Inorganic Chemistry, American Chemical Society, 2001, p. 1704-1711, vol. 40, No. 7, XP002196399.
Sergey Lamanasky et al., “Cyclometalalated Ir complexes in polymer organic light-emitting devices.”, Journal of Applied Physics, American Institute of Physics, Aug. 1, 2002, p. 1570-1575, vol. 92, No. 3, XP012057001.
Yuichiro Kawamura et al., “Energy transfer in polymer electrophosphorescent light emitting devices With single and multiple doped luminescent layers.”, Journal of Applied Physics, American Institute of Physics, Jul. 1, 2002, p. 87-93, vol. 92, No. 1, XP012056515.

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