Beaded rear projection screen with tunable gain

Details Beaded rear projection screen with tunable gain Beaded rear projection screen with tunable gain

G - Physics

03

B

G03B 21/62 (2006.01) H04N 5/74 (2006.01)

Patent

CA 2457133

The present invention provides a beaded rear projection screen (100) that has performance properties such as gain and viewing angle that can be tuned by using a mixture of two or more types of microbeads (110) having different refractive indices and varying the mixture. The present invention further provides methods of selecting microbeads (110) and the construction of the screen so that transmission through the screen (100) can remain sufficiently high throughout the range of tunability.

L'invention concerne un écran perlé de projection par transparence (100) doté de caractéristiques de fonctionnement, telles que le gain et l'angle visuel, qui peuvent être accordées au moyen d'un mélange de deux ou plusieurs types de microbilles (110) à indices de réfraction différents par variation dudit mélange. La présente invention concerne en outre des procédés de sélection de microbilles (110) ainsi que la formation dudit écran, de sorte que l'émission à travers ledit écran (100) peut rester suffisamment élevée sur toute la plage d'accordabilité.

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