Advanced polymer dispersed liquid crystal (PDLC) for display projection screens

A method for manufacturing a PDLC projection screen, consisting of:

• providing materials for producing a PDLC film, said materials comprising:
• at least two transparent polymer supports;
• and
• at least one liquid crystal dispersion;
• disposing said liquid crystal dispersion between said at least two transparent polymer supports, thereby forming a PDLC film;
• curing said PDLC film by means of UV light, electron beam light or heat;
• and,
• controlling the quality parameters of said PDLC projection screen;
• wherein:
• said step of disposing said liquid crystal dispersion between said at least two transparent polymer supports comprises disposing said liquid crystal dispersion to a thickness of 30-100 μm;
• and,
• said step of controlling the quality parameters of said PDLC projection screen further comprises a step of verifying that said quality parameters are equal to:
• a total light transmittance Tt of about 70 to 90%, a diffusion transmittance Dt of about 0 to 10%, a clarity C of 90 to 97%, and a haze value H of about 0 to 3%, measured in accordance with either ASTM D1003-13, ISO 13468-1:1996 or ISO 13468-2:1999.

A method for manufacturing a multilayer of liquid crystal dispersion in a polymer matrix film adapted for a PDLC projection screen, consisting of:

• providing materials for producing a PDLC film, comprising:
• at least one first releasable supporting film;
• at least one liquid crystal dispersion;
• at least one second supporting film;
• disposing said liquid crystal dispersion between said at least one first releasable supporting film and said at least one second supporting film, thereby forming a PDLC film;
• curing said PDLC film by means of UV light, electron beam light or heat;
• detaching said at least one releasable supporting film;
• providing materials for producing at least one second layer of liquid crystal in said PDLC film, comprising:
• a third supporting film;
• a second liquid crystal dispersion;
• disposing said second liquid crystal dispersion between said third supporting film and said PDLC film, thereby forming a multilayer PDLC film;
• curing said multilayer PDLC film by means of UV or electron beam light;
• and
• controlling the quality parameters of said PDLC projection screen;
• wherein:
• any of said supporting films can be releasable supporting films;
• said steps of disposing said liquid crystal dispersion between said at least one first releasable supporting film and said at least one second supporting film and of disposing said second liquid crystal dispersion between said third supporting film and said PDLC film comprise disposing said liquid crystal dispersions to a total thickness of 30-100 μm;
• and,
• said step of controlling the quality parameters of said PDLC projection screen further comprises a step of verifying that said quality parameters are equal to:
• a total light transmittance Tt of about 70 to 90%, a diffusion transmittance Dt of about 0 to 10%, a clarity C of 90 to 97%, and a haze value H of about 0 to 3%, measured in accordance with either ASTM D1003-13, ISO 13468-1:1996 or ISO 13468-2:1999.