Trichromatic colour filter comprising a substituted phthalocyanine

摘要

A trichromatic colour filter, suitable for use in a flat bed display, has a green pigment which is an optionally substituted octa-4,5-phthalocyanine, e.g. copper octa-4,5-phenyl-phthalocyanine. The colour filter may be prepared on a substrate e.g. an amorphous silicon thin film transistor.