US 7,495,384 B2
Display comprising a fluorescent dye doped polymer
Janos Peter Hajto, Edinburgh (United Kingdom); Colin Stuart Hindle, Edinburgh (United Kingdom); and Brendan Thomas McGuckin, Falkirk (United Kingdom)
Assigned to Freelight Systems Limited, Edinburgh (United Kingdom)
Appl. No. 10/362,806
PCT Filed Aug. 29, 2001, PCT No. PCT/GB01/03844
§ 371(c)(1), (2), (4) Date Jun. 11, 2003,
PCT Pub. No. WO02/19020, PCT Pub. Date Mar. 07, 2002.
Claims priority of application No. 00211169 (GB), filed on Aug. 29, 2000; and application No. 01038553 (GB), filed on Feb. 16, 2001.
Prior Publication US 2004/0100432 A1, May 27, 2004
Int. Cl. G02F 1/13357 (2006.01); H05B 33/00 (2006.01)
U.S. Cl. 313—504  [313/512; 362/800; 428/917] 6 Claims
OG exemplary drawing
 
1. A back-lighting source for use in the illumination of a display screen, the back-lighting source comprising a fluorescent dye doped polymer material and a phosphorescent material, said phosphorescent material being modulated such that the release of light can be controlled therefrom and wherein the absorption spectrum of the fluorescent dye contained within the polymer are wavelength matched with the energy spectrum of an LED which acts as a pumping source.