continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6487/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :24/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "LIGHT SOURCE COMPRISING A LIGHT EMITTING ELEMENT"
(51) International classification :H01L 33/00
(71)Name of Applicant :
1)TRIDONIC OPTOELECTRONICS GMBH,
(31) Priority Document No :A 2154/2000
Address of Applicant :EISENSTADTERSTRASSE 20, A-
(32) Priority Date :28/12/2000 8380 JANNERSDOF, AUSTRIA. Austria
(33) Name of priority country :Austria
2)LITEC GBR
(86) International Application No :PCT/AT2001/00364 3)LEUCHTSTOFEWERK BREITUNGEN GMBH
Filing Date
:19/11/2001 4)TOYOTA GOSEI CO. LTD.
(87) International Publication No :WO 02/054502 (72)Name of Inventor :
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
1)TASCH STEFAN
2)PACHLER PETER
3)ROTH GUNDULA
(62) Divisional to Application Number :00862/DELNP/2003 4)TEWS WALTER
Filed on
(57) Abstract :
:04/06/2003 5)KEMPFERT WOLFGANG
6)STARICK DETLEF
The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising
a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorhs a portion of the light emitted by the
light source and emits light in another spectral region. According to the invention, the luminophore is an alkaline-earth orthosilicate,
which is activated with bivalent europium and whose composition consists of: (2-x-y)SrO x(Ba, Ca)O (l-a-b-c-d)SiO2 aP2O5 bAl2O3
cB2Os dGeO2: y Eu2+ and/or (2-x~y)BaO x((Sr, Ca)O (1-a-b-c-d)SiO2 aP2O3 bAl2O3 cB2O; dGeO2: y Hu2+. The desired color
(color temperature) can be easily adjusted by using a luminophore of the aforementioned type. The light source can contain an
additional luminophore selected from the group of alkaline-earth aluminates, activated with bivalent europium and/or manganese,
and/or can contain an additional red-emitting luminophore selected from the group Y(V, P, Si)O4:Eu or can contain alkaline-earth
magnesium disilicate.
No. of Pages : 14 No. of Claims : 2
The Patent Office Journal 24/10/2008 25951