Back to results
US 5,409,734 AGranted
Making liquid suspension type light valve film
AssigneeHankuk Glass Industries, Inc.
InventorsJeong Hoon Lee, Byung Seok Yu, Eung Su Kim
Life of this patent
Estimating the term…
Abstract
A film for a light valve is made by phase separation of a mixture comprising a homogeneous polymeric solution and a liquid suspension of light-polarizing particles. Uniform liquid-suspension droplets in a polymeric matrix are formed by phase separation processing, e.g., by polymerization or solvent evaporation. Such simple, one-step processing results in cost reduction in display and window applications. Sealing problems of conventional light valves are alleviated.
Claims36
A method for making a liquid-suspension type light-valve film, comprising:
- forming a suspension comprising light-polarizing particles and a dispersant/stabilizer in a liquid suspending medium;
- forming a matrix solution comprising a matrix material which, under light-valve operating conditions, is substantially incompatible with the liquid suspending medium;
- forming a homogeneous mixture/solution of the matrix solution and the suspension;
- coating the homogeneous mixture/solution onto a substrate;
- and
- whereby the light-valve film is formed by phase separation.
3 more elements
Dependencies are inferred from the claim text.