Led-based illumination unit

Details Led-based illumination unit Led-based illumination unit

2007-02-27

2007-02-27

Roy, Sikha (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S486000, C313S512000, C257S098000, C252S30140R, C252S30140P

Reexamination Certificate

active

11321822

ABSTRACT:
The inventive white-light emitting luminescent conversion LED uses a chlorosilicate luminous substance which is doped with europium in addition to containing Ca and Mg and a garnet rare-earth substance, especially Y and/or Tb. This results in high quality color reproduction and highly constant lighting properties at various temperatures.

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Zhang et al., “Luminescence Properties and Energy Transfer of Eu2+Doped Ca8Mg (SiO4)4Cl2Phosphors”,J. Electrochem. Soc., Feb. 1992, vol. 139, No. 2, pp. 622-625, XP000334401.

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