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

(12) PATENT APPLICATION PUBLICATION (21) Application No.6347/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :21/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "SOLID-STATE, COLOR-BALANCED BACKLIGHT WITH WIDE ILLUMINATION RANGE"
(51) International classification :F21V 7/04 (71)Name of Applicant :
(31) Priority Document No :11/338,315
1)ASTRONAUTICS CORPORATION OF AMERICA
(32) Priority Date :24/01/2006
Address of Applicant :4115 NORTH TEUTONIA AVENUE,
(33) Name of priority country :U.S.A.
MILWAUKEE, WISCONSIN 53209, UNITED STATES OF
(86) International Application No :PCT/US2007/001756 AMERICA. U.S.A.
Filing Date
:23/01/2007 (72)Name of Inventor :
(87) International Publication No :WO 2007/087296 1)PETER A. ZAGAR
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
2)FREDERICK A. ELLNER
3)HANS C. HANSEN
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
A color balanced solid-state backlight (15) provides feedback control of each color using a single photo detector (42) by imposing a
modulation pattern (94, 96, 98) on the solid-state lamps revealing individual colors to the photodetector. The photo detector signal
provides feedback controlling color balance over a small range of instantaneous brightness less than larger range of average brightness
of the display to provide for accurate color balance throughout a large range of average brightnesses.
No. of Pages : 24 No. of Claims : 20
The Patent Office Journal 24/10/2008 25928