Electroluminescence device using liquid crystal compound

Details Electroluminescence device using liquid crystal compound Electroluminescence device using liquid crystal compound

2005-04-26

2005-04-26

Wu, Shean C. (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299620, C349S193000, C349S187000

Reexamination Certificate

active

06884477

ABSTRACT:
An electroluminescence device contains a carrier transporting layer comprising a liquid crystal compound represented byin-line-formulae description="In-line Formulae" end="lead"?R—X—A—B—X′—R′  (I),in-line-formulae description="In-line Formulae" end="tail"?wherein A and B denote a naphthalene-2,6-diyl skeleton optionally substituted with one or two of F, Cl, Br, CH3and CF3, at least one of A and B comprising a naphthalene-2,6-diyl skeleton having one to four CH groups replaced with N; X and X′ denote —O—, —S—, —OOC— or —COO—; and one of R and R′ denotes H, F, Cl, Br, CF3or a linear or branched alkyl group having 1-20 carbon atoms, and the other one of R and R′ denotes a linear or branched alkyl group having 3-20 carbon atoms, said alkyl groups being independently capable of including one methylene group which can be replaced with —O—, —S—, —CH═CH— or —C≡C— so long as heteroatoms are not adjacent to each other.

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Chigrim, et al., “Observation of Total omnidirectional reflection from a one-dimensional dielectric lattice”, 68, Appl. Phys. 25-28 (1999).

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