Browse Prior Art Database

Color Liquid Crystal Display

IP.com Disclosure Number: IPCOM000035323D
Original Publication Date: 1989-Jul-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Ikeda, A: AUTHOR [+3]

Abstract

In a color liquid crystal display (LCD), some materials which have both the functions of color filter and molecular alignment have been discovered.

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Color Liquid Crystal Display

In a color liquid crystal display (LCD), some materials which have both the functions of color filter and molecular alignment have been discovered.

The materials were prepared by dispersing coloring matter (red, green, blue) into polyimide and each color pixel could be fabricated by photolithographic process. The new functional material consists of polyimide and the coloring matter which is shown below. - Red: Solvent Red 122 - Green: Solvent Yellow 21 + Solvent Blue 25 - Blue: Acid Blue 129

The contents of the coloring matter were about 7-20 wt% against the resin, and the silane coupling agent (0.5 wt%) was blended to improve adhesive characteristics.

When the color filter was fabricated on a substrate with a transparent electrode and the liquid crystal was assembled by using the substrate as one side, the liquid crystal was aligned without domain such as reverse (tilt) domain, disinclination.

Then there is no doubt that the materials meet the characteristics required for molecular alignment, such as high resistivity, surface tension, reflective index, etc. The cell structure of the LCD is shown in the figure.

Thus, it has been clarified that the material has both the functions of color filter and molecular alignment layer simultaneously.

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