LED-based white-emitting illumination unit

Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type

Reexamination Certificate

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Details

C313S486000, C313S512000, C257S098000, C252S30140R, C252S30140P

Reexamination Certificate

active

07002291

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 colour reproduction and highly constant lighting properties at various temperatures.

REFERENCES:
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patent: 6255670 (2001-07-01), Srivastava et al.
patent: 6294800 (2001-09-01), Duggal et al.
patent: 6504179 (2003-01-01), Ellens et al.
patent: 6670748 (2003-12-01), Ellens et al.
patent: 196 38 667 (1998-04-01), None
patent: 98/12757 (1998-03-01), None
patent: WO 98/39805 (1998-09-01), None
patent: WO 00/57490 P (2000-09-01), None
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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