Browse Prior Art Database

Cell Structure to Control Multi-Cell Thickness in Liquid Crystal Displays

IP.com Disclosure Number: IPCOM000122818D
Original Publication Date: 1998-Jan-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Fujita, T: AUTHOR [+3]

Abstract

Disclosed is cell structure combined with post-spacers and multi-cell thickness to achieve a high contrast ratio, less color change in a gray scale, and high transmissivity. Post-spacers are: 1. on color filter substrate 2. on TFTs substrate 3. on color filter substrate and TFTs substrate (hybrid structure).

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Cell Structure to Control Multi-Cell Thickness in Liquid Crystal
Displays

      Disclosed is cell structure combined with post-spacers and
multi-cell thickness to achieve a high contrast ratio, less color
change in a gray scale, and high transmissivity.  Post-spacers are:
  1.  on color filter substrate
  2.  on TFTs substrate
  3.  on color filter substrate and TFTs substrate
       (hybrid structure).

      High transmissivity and less color change in a gray scale can
be achieved by multi-cell thickness, but the following problems occur
by ordinary technology (spacer-balls dispersion):
  o  Nonuniformity of cell thickness
      It is difficult to control cell thickness by dispersed
      nonuniform plastic balls (spacer-balls) in a multi-cell
      thickness cell.
  o  The liquid crystals alignment defects happen because of
      spacer-balls moving in the cell under shock or vibration
      stress.
  o  Spacer-balls cluster occurs, then degrade the quality of
      the front screen.  Spacer-ball-free cell structure combined
      with multi-cell thickness enables solving these problems
      and producing high-quality liquid crystal displays.

      One example of Spacer-ball-free cell structure combined with
multi-cell thickness is shown in the Figure.