G - Physics
09
F
G09F 13/00 (2006.01) F21V 8/00 (2006.01)
Patent
CA 2162236
Lighting fixtures which feature indicia illuminated more uniformally and with greater brightness than in conventional lighting fixtures. LEDs which operate at a higher frequency/shorter wavelength, such as blue LEDs, emit light which causes the transformation material to reemit, reradiate or emit light at a lower frequency/longer wavelength with increased brightness and uniformity. In the preferred embodiment of the invention, blue LEDs cause the transformation material to emit green light for bright and even illumination of indicia such as letters and chevrons in exit signs, and at a wavelength to which the human eye is serendipitously sensitive.
Appareils d'éclairage permettant d'illuminer des indicateurs avec plus d'uniformité et de luminosité que dans les appareils d'éclairage traditionnels. La lumière de DEL à fréquence plus élevée/longueur d'onde plus courte, p. ex. DEL bleues, fait réémettre ou émettre, au niveau du matériau de transformation, de la lumière de fréquence plus basse/longueur d'onde plus longue, ce qui améliore la luminosité et l'uniformité. Dans la version préférée de l'invention, des DEL bleues font émettre au matériau de transformation de la lumière qui permet l'illumination brillante et uniforme, p. ex. de lettres et flèches d'enseignes de sortie, sur une longueur d'onde heureusement adaptée à la sensibilité de l'oeil humain.
O'shea Donald C.
Smith Stephen T.
Bereskin & Parr
Nsi Enterprises Inc.
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