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US 9,541,692 B2Granted
Optical retardation film and method of production thereof
AssigneeCrysoptix KK
InventorEllina Kharatiyan
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Abstract
The present invention relates generally to the field of organic chemistry and particularly to the optical retardation films for liquid crystal displays. The present invention provides an optical film comprising a substrate having front and rear surfaces, and at least one solid retardation layer on the front surface of the substrate. Said solid retardation layer comprises rigid rod-like macromolecules comprising n organic units of the first type having general structural formula I and k organic units of the second type having general structural formula II
Claims19
A macromolecule of general structural formula I
- wherein
- n and k are each from 1 to 10,000, and n+k≧10;
- R1 and R2 are side-groups independently selected from the list consisting of —H, -alkyl, —(CH2)mSO3M, —(CH2)mSi(O-alkyl)3, —CH2-aryl, and —(CH2)mOH, wherein m is a number from 1 to 18, and in case -H is one of the side-groups, then total number of —H does not exceed 50% of total number of side-groups in the macromolecule;
- and
- M is counterion selected from the list consisting of H+, Na+, K+, Li+, Cs+, Ba2+, Ca2+, Mg2+, Sr2+, Pb2+, Zn2+, La3+, Al3+, Ce3+, Y3+, Yb3+, Gd3+, Zr4+, and NH4−pQp+, where Q is selected from the list consisting of linear and branched (C1-C20)alkyl, (C2-C20)alkenyl, (C2-C20)alkynyl, and (C6-C20) arylalkyl, and p is 0, 1, 2, 3 or 4.
2 more elements
Dependencies are inferred from the claim text.