Optical panel capable of switching between reflective and...

Details Optical panel capable of switching between reflective and... Optical panel capable of switching between reflective and...

G - Physics

02

F

G02F 1/1335 (2006.01) E06B 9/24 (2006.01) G02F 1/13357 (2006.01) G09F 9/35 (2006.01) G02F 1/1347 (2006.01)

Patent

CA 2224324

A device (8), comprising a switchable optical panel (10) and means (19, 21, 23) for switching the panel between a reflecting state and a transmitting state. The switchable optical panel includes a transparent optically active layer (12) having a first and a second major surface, a first reflective polarizer (32) disposed on the first major surface and a second reflective polarizer (34) disposed on the second major surface. The optically active layer preferably comprises a liquid crystal device and the switching means preferably comprises a system of driving electronics for applying voltage across the liquid crystal device. The invention also includes a switchable window (62, 114) and a transflective optical display (128).

L'invention concerne un dispositif (8) comprenant un panneau optique commutable (19) et des moyens (19, 21, 23) pour effectuer la commutation du panneau entre un état réflecteur et un état émetteur. Le panneau optique commutable comprend une couche transparente optiquement active (12) ayant des première et seconde surfaces principales, un premier polariseur réflecteur (32) disposé sur la première surface principale et un second polariseur réflecteur (34) disposé sur la seconde surface principale. La couche optiquement active comprend de préférence un dispositif à cristaux liquides, et les moyens de commutation comprennent de préférence un système de commande électronique permettant d'appliquer une tension sur le dispositif à cristaux liquides. L'invention décrit également une fenêtre commutable (62, 114) et un affichage optique transflecteur (128).

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