Optical fibre for display application

G - Physics – 02 – B

Patent

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G02B 1/04 (2006.01) F21V 8/00 (2006.01)

Patent

CA 2338860

The present invention describes a fluorescent dye doped polymer based optical wave-guide structure. The described polymers can be used to fabricate a range of display elements and illumination systems which work without the use of external electrical power. This is due to the process of the fluorescent dyes absorbing ambient light and then subsequently emitting light which is conducted by the polymer host material to a point where it is emitted. The emitted light can be of a range of colours depending upon the type of dye that polymers are doped with. There is a constant contrast between the light power flux emitted for the wave-guide structure and the light power flux of the ambient light. There is also provided a method in which a dielectric stack mirror layer fabricated on the surface of the polymer which can be used to improve the efficiency and the contrast of those optical elements.

L'invention concerne une structure de guide d'onde optique à base de polymère dopé au colorant fluorescent. Ces polymères peuvent être utilisés pour fabriquer une plage de systèmes d'illumination et d'éléments d'affichage qui fonctionnent sans utiliser d'énergie électrique extérieure. Ceci est dû au procédé qui utilise des colorants fluorescents absorbant la lumière ambiante, puis émettant ladite lumière amenée par le matériau polymère hôte vers un point à partir duquel elle est émise. La lumière émise peut posséder une plage de couleurs dépendant du type de colorants avec lesquels les polymères sont dopés. Il existe un contraste permanent entre le flux d'énergie lumineuse émis à partir de la structure de guide d'onde et le flux d'énergie lumineuse provenant de la lumière ambiante. L'invention concerne également un procédé qui peut utiliser une couche miroir à pile diélectrique fabriquée sur la surface du polymère pour améliorer l'efficacité et le contraste de ces éléments optiques.

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