Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2004-03-05
2008-10-21
Nelms, David C. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S113000
Reexamination Certificate
active
07440059
ABSTRACT:
Provided are a reflective liquid crystal display device and a liquid crystal display unit capable of eliminating or minimizing the occurrence of misalignment specific to a vertically aligned liquid crystal due to the structure of a pixel groove and achieving higher contrast and superior image quality. In a reflective pixel electrode (42), a peripheral portion is inclined, and the reflective pixel electrode has a trapezoidal shape so that the width of the reflective pixel electrode (42) increases from the top side to the bottom side. When a side surface of the reflective pixel electrode (42) is inclined so as to eliminate verticality in a cross section of the reflective pixel electrode (42), liquid crystal molecules aligned in a horizontal direction to an extreme in a pixel groove portion can be eliminated. Even if liquid crystal molecules are locally and slightly aligned in a horizontal direction, sufficient verticality can be maintained in the pixel groove portion by an interaction with vertically aligned liquid crystal molecules around the horizontally aligned liquid crystal molecules.
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Nelms David C.
Sonnenschein Nath & Rosenthal LLP
Sony Corporation
Vu Phu
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