High-pretilt polyphenylene layers for liquid-crystal displays

Nehring, J.; Amstutz, H.; Holmes, P. A.; Nevin, A.
October 1987
Applied Physics Letters;10/19/1987, Vol. 51 Issue 16, p1283
Academic Journal
High-pretilt angles (of about 20°), as required for highly multiplexable liquid-crystal displays based on the ‘‘supertwisted birefringence effect,’’ can be obtained by rubbing polyphenylene layers. The aligning properties of such layers depend somewhat on the type of the precursor polymer from which the polyphenylene is made and on the substrate on which it is formed. A 120×240 matrix display prototype with 270° twist and rubbed polyphenylene orientation layers showed a uniform and stable surface alignment over the whole display area.


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