FEUILLE DE MOSAIQUE DE LENTILLES, ECRAN DE TRANSMISSION ET AFFICHEUR DE TYPE RETROPROJECTEUR

N° de brevet: EP1452908 (A1)
Date de publication: 2004-09-01
Inventeur(s): YOSHIDA TSUTOMU [JP];EBINA KAZUYOSHI [JP];ABE TAKASHI [JP];TAKAHASHI SUSUMU [JP];
Demandeur(s): TOPPAN PRINTING CO LTD [JP];
Classification: G02B3/00;G03B21/62;
N° de demande: EP20020781873 20021203 
Numéro(s) de priorité: WO2002JP12655 20021203;JP20010369216 20011203;JP20020241309 20020822 
A lens array sheet, a transparent screen using the same, and a rear-projection display device are provided in which it is possible to control a perspective angle for the image in both a horizontal direction and a vertical direction without causing a problem in that a gain (brightness) of a light is reduced by an optical absorption and an S/N ratio is reduced by an increased white dispersion. <??>A first lens array 18 and a second lens array 20 which are formed by disposing a plurality of half-cylindrical lenses 17, 19 in parallel on a common plain (a surface of a base member layer13a) such that longitudinal directions of the cylindrical lenses 17, 19 should be orthogonal to each other. Unified lens array layer 13b and a shading layer 16 in which a section through which a light does not transmit is formed on a focal plain of the lens array layer 13b form a lens array sheet. Furthermore, fresnel lens are combined so as to form a transparent screen. <IMAGE>

Copyright © 2008 Patfr.com Tous droits réservés. Contact