Polarising liquid crystal device for security documents

Details Polarising liquid crystal device for security documents Polarising liquid crystal device for security documents

B - Operations, Transporting

42

D

B42D 15/10 (2006.01) G02F 1/1335 (2006.01) G02F 1/1337 (2006.01)

Patent

CA 2493574

A polarising liquid crystal device comprises a substrate (10), at least one photo-alignment layer (12) which is uniformly aligned with a polarised light source and a nematic liquid crystal layer (14) applied to the photo-alignment layer (12). A latent image (18;48;78) which is viewable under cross-polarisers is formed by the photo-alignment layer (12) and the liquid crystal layer (14) without the aid of a mask by a variable printing or laser writing process.

L'invention concerne un dispositif à cristaux liquides de polarisation comprenant un substrat (10), au moins une couche de photo-alignemement (12) alignée de manière uniforme avec une source lumineuse polarisée et une couche à cristaux liquides nématique (14) appliquée sur la couche de photo-alignement (12). Une image latente (18, 48, 78) visible sous polariseurs croisés est formée par la couche de photo-alignement (12) et la couche à cristaux liquides (14) sans avoir recours à un masque, lors d'un processus d'impression variable ou d'écriture laser.

Affiliated with

Also associated with

Rating

Polarising liquid crystal device for security documents does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polarising liquid crystal device for security documents, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarising liquid crystal device for security documents will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1503456