Patent ID: 7649595

Claim:
A method of forming a polymer dispersed liquid crystal cell comprising: a) preparing a porous polymer matrix out of monomers and/or oligomers between a first and a second substrate, wherein pores of said porous polymer matrix are filled with a first material, b) lifting off said second substrate from a face of said porous polymer matrix, c) removing said first material from said porous polymer matrix, d) placing a third substrate on a face of said porous polymer matrix, from which face said second substrate had been lifted off in step b), and e) filling some or substantially all of said pores of said porous polymer matrix with a second material which is liquid crystalline, wherein said second material is dye doped with a dye consisting of azo, anthraquinone, or azo and anthraquinone, wherein said steps c) and e) occur concomitantly.