Patent ID: 6512643
Filing Date: 2003-01-28
Classification: G02B

Abstract:
A photoselective absorbing filter comprising a light selective absorbing coloring material that selectively absorbs external light in a color display device having blue, green, and red picture elements, wherein a transmittance of light at a wavelength ranging from 470 to 510 nm and at a wavelength ranging from 550 to 600 nm is smaller than a transmittance of light in a visible range other than said two wavelength ranges,wherein said light selective absorbing coloring material comprises (a) a pyridinophthalocyanine selected from the group consisting of a metal-tetra-2,3-pyridinoporphyrazine of general formula (I), a metal-tetra-3,4-pyridinoporphyrazine of general formula (II), a tetra-2,3-pyridinoporphyrazine of general formula (III), a tetra-3,4-pyridinoporphyrazine of general formula (IV), and mixtures thereof, wherein M is a center metal selected from the group consisting of copper, cobalt, nickel, zinc, iron, tin, and aluminum; X is a ligand bonded directly to the center metal M and is a halogen atom selected from fluorine, chlorine, and bromine, an oxygen atom, a nitrogen atom, a hydroxy group, or a siloxane group; R is an alkyl group or a halogen atom; and n is an integer of 0 to 3; and (b) an anthraquinone dye.