Development of Color Resists Containing Novel Dyes for Liquid Crystal Displays

SUMITOMO KAGAKU 2013 through each color filter for each pixel instantaneously by a liquid crystal shutter. Improving the brightness of color filters comes down to improving the brightness of each pixel,3) in other words, improving the transmittance of color resists, which are the materials that form the pixels. In addition to resist components, color resists have colorants mixed in, and color performance is mainly determined by the colorants. Currently, color resists for LCDs use pigment dispersed resists in which pigments are sub-micro-dispersed for the colorants. In the early days of color filters, there were color filters manufactured by dyeing casein with dyes,4) and pigment dispersed resists in which pigments were used as colorants were not usedfrom the standpoint of productivity, color density and durability. Here we will discuss pigments and dyes, which are the focal point of this article. Pigments and dyes are used for forming color coated films and dyeing fibers respectively, and both of them are colorants; however, they are classified according to whether they are insoluble in solvents and are in a dispersed state or whether Development of Color Resists Containing Novel Dyes for Liquid Crystal Displays