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Spacerball Free PI-Cell Structure

IP.com Disclosure Number: IPCOM000123060D
Original Publication Date: 1998-May-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 27K

Publishing Venue

IBM

Related People

Noguchi, M: AUTHOR [+2]

Abstract

This article describes a special structure of the bend-alignment liquid crystal cell (called PI(&pi.)-cell) which has a polymer rib structure instead of a spacerball in the liquid crystal cell (called spacerball free structure). In the usual cell with the spacerballs, the spacerballs capture some disclinations, resulting in the pixel defect, while there is no disclination in the rib structure.

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Spacerball Free PI-Cell Structure

        This article describes a special structure of the
bend-alignment liquid crystal cell (called PI(&pi.)-cell) which has a
polymer rib structure instead of a spacerball in the liquid crystal
cell (called spacerball free structure).  In the usual cell with the
spacerballs, the spacerballs capture some disclinations, resulting in
the pixel defect, while there is no disclination in the rib
structure.

   The figure shows the spacerball free PI-cell structure.  A
polymer rib is constructed on the TFT (Thin Film Transistor) glass
or opposite glass.  The polymer rib must be constructed under the
black matrix, for example on the TFT or on the data line.  The
number of a polymer rib should be one per to ten pixels.