POLYMER-DISPERSED LIQUID CRYSTAL DEVICE HAVING AN ULTRAVIOLET-POLYMERIZABLE MATRIX AND A VARIABLE OPTICAL TRANSMISSION AND A METHOD FOR PREPARING THE SAME
摘要
A polymer-dispersed liquid crystal device comprises a multiplicity of droplets of a birefringent, functionally nematic liquid crystal material dispersed in a matrix comprising the reaction product of ultraviolet radiation polymerizable materials. The device specularly transmits incident light as a function of the magnitude of an electric field applied across the device. The difference between a first applied voltage corresponding to a first percentage of the total incident light transmitted by the device as a specular light and a second applied voltage corresponding to a second percentage of the total incident light transmitted by the device as specular light is greater than or equal to 15 volts. As a result, a polymer-dispersed liquid crystal device according to the invention displays a variable grey scale which has a uniform optical transmission. A method for preparing a PDLC device in general is also disclosed.
申请公布号
WO9212219(A1)
申请公布日期
1992.07.23
申请号
WO1992US00173
申请日期
1992.01.10
申请人
MINNESOTA MINING AND MANUFACTURING COMPANY
发明人
MILLER, STEPHEN, A.;HUFFMAN, WILLIAM, A.;GILBERT, LAURENCE, R.;VESLEY, GEORGE, F.