Directly formed polymer dispersed liquid crystal light shutter displays
OwnerJiansheng Wanginventor
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Abstract
A polymer dispersed liquid crystal display device is provided comprising a copolymer formed from monomers having significantly different reactivities. A reverse mode device is provided consisting of negative liquid crystal microdroplets dispersed in a non-homogeneous polymer matrix consisting of a monomer having a high reactivity and a high surface free energy and another monomer having a low reactivity and has a low surface free energy. The surface active monomer is preferentially distributed at the surface of microdroplets formed by phase separation, causing homeotropic alignment of the liquid crystals.
Claims23
A polymer-dispersed liquid crystal light shutter device for transmitting and scattering light comprising:
- a non-homogeneous light transmissive copolymer matrix;
- and
- droplets of liquid crystal material dispersed in the copolymer matrix.
A method of forming a polymer-dispersed liquid crystal light shutter device for transmitting and scattering light comprising:
- mixing a higher reactivity monomer, a lower reactivity monomer and a liquid crystal material to form a homogeneous solution;
- and
- curing the copolymer.
A method for flattening microdroplets of negative liquid crystal material dispersed in a polymer comprising:
- applying an electric field to the polymer during the time the microdroplets are spontaneously forming from solution and the liquid crystal material is in an anisotropic state.
Dependencies are inferred from the claim text.