ILLUMINATION UNIT EQUIPPED WITH AT LEAST ONE LED AS LIGHT SOURCE - PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH

Title:

ILLUMINATION UNIT EQUIPPED WITH AT LEAST ONE LED AS LIGHT SOURCE

Document Type and Number:

Japanese Patent JP2003124527

Kind Code:

A

Abstract:

To provide an illumination unit which shows invariance even if operation temperature varies and has high color reproducibility and high efficiency.

The illumination unit which is equipped with at least one LED as a light source and is characterized in that the LED emits primary radiation in a range of 300 to 485 nm and a fluorescent body exposed to the primary radiation of the LED converts the radiation partially or completely into radiation of long wavelength performs the conversion by using the fluorescent body originating from a kind of Eu-activated SIALON which emits yellow-orange light of wavelength of peak illumination of 540 to 620 nm and the SIALON is represented as Mp/2Si12-p-qAlp+qOqN16-q:Eu2+, where M is Ca alone or Ca combined with Sr or Mg, (q) is 0 to 2.5, and (p) is 0 to 3.

Inventors:

ELLENS ANDRIES
KUMMER FRANZ
HUBER GUENTHER DIPL ING

Application Number:

JP2002206125A

Publication Date:

April 25, 2003

Filing Date:

July 15, 2002

Export Citation:

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Assignee:

PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH

International Classes:

C09K11/08; C09K11/59; C09K11/62; C09K11/64; C09K11/77; C09K11/80; H01L25/13; (IPC1-7): H01L33/00; C09K11/08; C09K11/59; C09K11/62; C09K11/64; C09K11/80

Attorney, Agent or Firm:

Toshio Yano (4 outside)

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