Liquid crystal cells – elements and systems – Particular excitation of liquid crystal – Electrical excitation of liquid crystal
Reexamination Certificate
2011-01-18
2011-01-18
Nguyen, Hoan C (Department: 2871)
Liquid crystal cells, elements and systems
Particular excitation of liquid crystal
Electrical excitation of liquid crystal
C349S043000, C349S038000, C349S039000, C349S143000, C349S144000, C257S059000, C257S072000, C345S092000
Reexamination Certificate
active
07872697
ABSTRACT:
A VA mode LCD obtains a wide viewing angle without forming cutouts or protrusions in the common electrode. A pixel electrode has a cutout; a direction control electrode overlaps the cutout; a first storage electrode overlaps the pixel electrode; and a second storage electrode overlaps the direction control electrode. The pixel electrode has plurality of partitions, each partition has two major edges that are parallel to each other. In the present invention, the electric field generated by the direction control electrode pre-tilts the LC molecules by maintaining the direction control electrode voltage with respect to the common voltage higher than the pixel electrode voltage with respect to the common voltage. The LC molecules in each partition receive horizontal components of electric fields that are substantially perpendicular to the major edges thereby sorting the LC molecules into four tilt directions and thus widening the reference viewing angle according to the tilt directions of the LC molecules.
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patent: 7345730 (2008-03-01), Kim et al.
patent: 2005/0078253 (2005-04-01), Kim et al.
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Innovation Counsel LLP
Nguyen Hoan C
Samsung Electronics Co,. Ltd.
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