Dyeing color-filters for liquid crystal display

It is pointed out that the development of LCDs (liquid crystal displays) for OA and TV has focused on larger sizes and coloring. A color filter (CF) which makes colored-LCDs possible must have higher color purity and contrast to light. To match these features, a water soluble photosensitive composition composed of special polypeptides obtained by hydrolysis of cattle gelatin was developed. The photosensitive composition has good resolution and stability for aging. The hydrolyzate can be produced in a good yield under strict control to have a narrow distribution of a desirable molecular weight. The dyeing CF, featuring the hydrolyzate, is the most suitable for commercial production.<>