Light modulating materials comprising a liquid crystal phase dis

Details Light modulating materials comprising a liquid crystal phase dis Light modulating materials comprising a liquid crystal phase dis

1989-03-20

1991-02-19

Maples, John S.

Compositions

Liquid crystal compositions

2522995, 428 1, 350334, 350347E, 350348, 350347R, C09K 1952

Patent

active

049942042

ABSTRACT:
A haze-free light modulating polymer dispersed liquid crystal (PDLC) material is disclosed which comprises a polymer matrix which is birefringent and possesses anisotropic optical properties similar to those of the dispersed liquid crystal microdroplets such that the PDLC material in its transparent state exhibits a refractive index that is matched for all directions of incident light providing for an optically clear, scatter-free film for all angles of view. Electrooptic light shutters are possible from this material which are transparent in the field OFF-state and opaque in the field ON-state or vice versa, depending upon the microdroplet structure and configuration of the light shutter device.

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