Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.123/CHENP/2012 A
(19) INDIA
(22) Date of filing of Application :04/01/2012 (43) Publication Date : 21/06/2013
(54) Title of the invention : ILLUMINATION SYSTEM FOR SPOT ILLUMINA
(51) International classification :F21V7/00
(31) Priority Document No :09162852.9
(32) Priority Date :16/06/2009
(33) Name of priority country :EPO
(86) International Application No
Filing Date
(87) International Publication No : NA
(61) Patent of Addition to Application
:NA
Number
:NA
Filing Date
(62) Divisional to Application Number
Filing Date
:PCT/IB2010/052559
:09/06/2010
:NA
:NA
(71)Name of Applicant :
1)KONINKLIJKE PHILIPS ELECTRONICS N.V.
Address of Applicant :GROENEWOUDSEWEG 1
EINDHOVEN 5621 BA NETHERLANDS
(72)Name of Inventor :
1)TUKKER Teunis Willem
2)LENDERIK Egbert
3)KURT Ralph
4)SPIKES Mark Eduard Johan
(57) Abstract :
An illumination system (10) for spot illumination comprising a tubular reflector (2) with a reflective inner surface the tubular
reflector (2) having an entrance aperture (7) and an exit aperture (8) being larger than the entrance aperture (7); and a light-source
array (1) comprising a plurality of light-sources (13a c; 30a d 31a d 32a d) arranged to emit light into the tubular reflector (2) at
the entrance aperture (7) thereof. At least one of the tubular reflector (2) and the light-source array (1) is configured in such a way
that each symmetry state of the light-source array (1) is different from any symmetry state of the tubular reflector (2). By avoiding
coinciding symmetry states the occurrence of preferred directions of the emitted light can be reduced whereby the spatial
homogeneity with respect to intensity and where applicable color of the emitted light can be improved.
No. of Pages : 15 No. of Claims : 13
The Patent Office Journal 21/06/2013 13707