Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2006-12-05
2006-12-05
Dudek, James (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
Reexamination Certificate
active
07145626
ABSTRACT:
A phoretic display device comprising a plurality of electrophoretic or magnetophoretic cells, each having a phoretic particle dispersed within a suspension medium comprising a liquid crystal material. The phoretic cell is adapted to induce defects, sometimes known as disclinations, in the alignment of the liquid crystal material within the cell which act to exert a retentive force on the phoretic particle when within the region of influence of the defects. The configuration of the display introduces a threshold level in the electric or magnetic field required to move the phoretic particle between defects within the cell. Accordingly, the non-linear electro-optic or magneto-optic behaviour of the display facilitates matrix addressing of the cells therein. The display may comprise a plurality of prolate spheroid phoretic cells arranged in an encapsulant, the major (long) axis of each cell arranged substantially perpendicular to the plane of the display.
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Hui Victor Chaklam
Miller Richard Jonathan
Dudek James
McDonnell Boehnen & Hulbert & Berghoff LLP
Qinetiq Limited
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