Scratch and mar resistant PDLC modulator
View Patent ↗A PDLC modulator is fabricated using at least one a selection of specially-formulated UV curable organic hard coatings as a protective layer on the exposed side of polyester (Mylar) film. The hard coatings of various related types show good adhesion on a polyester film substrate, superior hardness and toughness, and have a slippery top surface, which minimizes unnecessary wear. The coating as applied on the modulator surface significantly reduces scratch damage on modulators caused by unexpected particles on the panels under test. In addition, the slip surface will reduce stickiness to particles and therefore also reduce the possibility of panel damage.
1. A method for fabricating a PDLC-based modulator comprising
coating PDLC material directly on an optical block substrate;
coating a water-borne adhesive over the PDLC material;
laminating a dielectric mirror/pellicle over the PDLC and adhesive; and
coating the polyester surface with a UV curable organic coating; and
UV curing the curable organic coating to an organic hard coating.
2. The method according to claim 1 further including formulating the UV curable organic coating as a mixture of multi-functional acrylates, silicone acrylate as a slip agent, and photo-initiators.
3. The method according to claim 1 further including formulating the UV curable organic coating as a mixture and multi-functional acrylates, silicone acrylate as a slip agent, a crosslinkage adhesion promoter, and photo-initiators.
4. The method according to claim 1 further including formulating the UV curable organic coating as a mixture of multi-functional acrylates, silicone acrylate as a slip agent, a crosslinkage adhesion promoter, a (meth)acrylate terminated toughener, and photo-initiators.
5. The method according to claim 1 further including formulating the UV curable organic coating as a mixture of multi-functional acrylates, silicone acrylate as a slip agent, a (meth)acrylate terminated toughener, nano sized silica as an inorganic filler, and photo-initiators.
6. The method according to claim 1 further including formulating the UV curable organic coating as a mixture of multi-functional acrylates, silicone acrylate as a slip agent, a (meth)acrylate terminated toughener, nano sized silica as inorganic filler, a silane coupling agent, and photo-initiators.
7. The method according to claim 1 further including formulating the PDLC as a mixture of hydroxyl polyacrylate with a TL-series liquid crystal, where the hydroxyl group is crosslinked by polyisocyanate.
8. A PDLC-based modulator with a protective coating, said modulator comprising:
a coating PDLC material directly on an optical block substrate;
a water-borne adhesive layer coating the PDLC material;
a dielectric mirror/pellicle laminated on top of the adhesive layer; and
a cured UV curable organic hard coating on the pellicle.
9. The modulator according to claim 8 wherein the UV curable organic coating is a mixture of multi-functional acrylates, silicone acrylate as a slip agent, and photo-initiators.
10. The modulator according to claim 8 wherein the UV curable organic coating is a mixture of multi-functional acrylates, silicone acrylate as a slip agent, a crosslinkage adhesion promoter, and photo-initiators.
11. The modulator according to claim 8 wherein the UV curable organic coating is a mixture of multi-functional acrylates, silicone acrylate as a slip agent, a crosslinkable adhesion promoter, a (meth)acrylate terminated toughener, and photo-initiators.
12. The modulator according to claim 8 wherein the UV curable organic coating is a mixture of multi-functional acrylates, silicone acrylate as a slip agent, a (meth)acrylate terminated toughener, nano sized silica as an inorganic filler, and photo-initiators.
13. The modulator according to claim 8 wherein the UV curable organic coating is a mixture of multi-functional acrylates, silicone acrylate as a slip agent, a (meth)acrylate terminated toughener, nano sized silica as inorganic filler, a silane coupling agent, and photo-initiators.
14. The modulator according to claim 8 wherein the PDLC is a mixture of hydroxyl polyacrylate with a TL-series liquid crystals, where the hydroxyl group is crosslinked by polyisocyanate.