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