Modulator with improved sensitivity and life time
View Patent ↗An electro-optic modulator assembly includes a sensor layer made from an electro-optic modulator material that comprises liquid crystal droplets encapsulated within a polymer matrix. The sensor layer material comprises an interfacial agent, for example a defoaming agent, in an amount sufficient to lower an intrinsic operating voltage at which the sensor layer transmits light. The defoaming agent can comprise from about 1 to about 10 percent by weight of the electro-optic modulator material, and the defoaming agent may comprise a reactive component to react with the polymer matrix, for example at least one of a siloxane with a reactive end group, a reactive fluorinated polymer or a non-ionic block copolymer to react with the polymer matrix. The assembly can also include a hard coating layer to protect the sensor layer.
1. An NCAP latex-based modulator with a protective coating, said modulator comprising:
an NCAP latex based material comprising an interfacial agent;
a dielectric mirror pellicle laminated on top of the NCAP material; and
a cured UV curable organic hard coating on the mirror pellicle.
2. The modulator of claim 1 wherein the interfacial agent comprises a defoaming agent.
3. The modulator of claim 2 wherein an amount of the defoaming agent is sufficient to decrease an operating voltage of the modulator.
4. The modulator of claim 2 wherein the defoaming agent comprises a siloxane with a reactive end group in an amount sufficient to decrease an operating voltage of the modulator.
5. The modulator of claim 2 wherein the defoaming agent comprises a reactive fluorinated polymer present in an amount sufficient to decrease an operating voltage of the modulator.
6. The modulator of claim 2 wherein the defoaming agent comprises a non-ionic block copolymer present in an amount sufficient to decrease an operating voltage of the modulator.
7. The modulator of claim 1 wherein the UV curable organic coating comprises 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.