Color conversion filter substrate, color conversion type multicolor organic EL display having the color conversion filter substrate, and methods of manufacturing these

A color-converting filter substrate, comprising:

• a transparent supporting substrate;
• at least one color-converting filter layer formed of a resin film containing fluorescent colorant and formed in a desired pattern on the supporting substrate;
• a transparent polymeric film layer for covering the color-converting filter layer to be flat;
• at least two transparent inorganic film layers formed on the polymeric film layer;
• and
• a transparent electrode layer formed in at least one electrically independent region on the inorganic film layer;
• wherein for a wavelength λ in a range from 450 nm to 500 nm inclusive, a refractive index of one of the inorganic film layers adjacent to the transparent electrode layer is lower than that of the transparent electrode layer, and refractive indices and thicknesses of (2p−1)th and 2pth inorganic film layers counting from the transparent electrode layer, wherein p is a natural number, satisfy the relationships
• n2p−1>n2p, n2p−1d2p−1=s2p−1λ/2, and n2pd2p=s2pλ/4,
• wherein n is a refractive index of one inorganic film layer, d is a thickness of the one inorganic film layer, and s is a natural number.

A color-converting filter substrate, comprising:

• a transparent supporting substrate;
• at least one color-converting filter layer formed of a resin film containing fluorescent colorant and formed in a desired pattern on the supporting substrate;
• a transparent polymeric film layer for covering the color-converting filter layer to be flat;
• a transparent inorganic film layer formed of a laminate of at least two inorganic film layers deposited on the polymeric film layer;
• and
• a transparent electrode layer formed in at least one electrically independent region on the inorganic film layer;
• wherein for a wavelength λ in a range from 450 nm to 500 nm inclusive, a refractive index of one of the inorganic film layers adjacent to the transparent electrode layer is lower than a refractive index of the transparent electrode layer, and refractive indices and thicknesses of (2p−1) th and 2pth inorganic film layers counting from the transparent electrode layer, wherein p is a natural number, satisfy the relationships
• n2p−1<n2p, n2p−1d2p−1=s2p−1λ/4, and n2pd2p=s2pλ/2,
• wherein n is a refractive index of one inorganic film layer, d is a thickness of the inorganic film layer, and s is a natural number.

A color-converting filter substrate, comprising:

• a transparent supporting substrate;
• at least one color-converting filter layer formed of a resin film containing fluorescent colorant and formed in a desired pattern on the supporting substrate;
• a transparent polymeric film layer for covering the color-converting filter layers to be flat;
• a single transparent inorganic film layer formed on the polymeric film layer;
• and
• a transparent electrode layer formed in at least one electrically independent regions on the inorganic film layer;
• wherein said inorganic film layer includes a composition such that a refractive index of the inorganic film layer decreases continuously from the transparent electrode layer toward the polymeric film layer.

A method of manufacturing a color-converting filter substrate, comprising the steps of:

• preparing a transparent supporting substrate;
• forming, in a desired pattern on the supporting substrate, at least one color-converting filter layer formed of a resin film containing fluorescent colorant;
• forming a transparent polymeric film layer for covering the color-converting filter layers to be flat;
• forming one transparent inorganic film layer on the polymeric film layer, and for a wavelength λ in a range from 450 nm to 500 nm inclusive, said inorganic film layer having a film thickness d that satisfies a relation ship
• nd=sλ/2,
• wherein n is a refractive index to light of wavelength λ, and s is a natural number;
• and
• forming a transparent electrode layer in at least one electrically independent region on the inorganic film layer, the transparent electrode layer having a refractive index higher than that of the inorganic film layer.

A method of manufacturing a color-converting filter substrate, comprising the steps of:

• preparing a transparent supporting substrate;
• forming, in a desired pattern on the supporting substrate, at least one color-converting filter layer formed of a resin film containing fluorescent colorant;
• forming a transparent polymeric film layer for covering the color-converting filter layers to be flat;
• forming a transparent inorganic film layer having a thickness d on the polymeric film layer;
• and
• forming transparent electrode layer in at least one electrically independent region on the inorganic film layer, the transparent electrode layer having a refractive index higher than that of the inorganic film layer;
• wherein the inorganic film layer is constituted from a laminate of at least two inorganic film layers, and for a wavelength λ in a range from 450 nm to 500 nm inclusive, a refractive index of the inorganic film layer adjacent to the transparent electrode layer is lower than a refractive index of the transparent electrode layer, and refractive indices and thicknesses of (2p−1) th and 2pth inorganic film layers counting from the transparent electrode layer, wherein p is a natural number, satisfy the relationships
• n2p−1>n2p, n2p−1d2p−1=s2p−1λ/2, and n2pd2p=s2pλ/4,
• wherein n is a refractive index of one inorganic film layer, d is a thickness of the one inorganic film layer, and s is a natural number.

A method of manufacturing a color-converting filter substrate, comprising the steps of:

• preparing a transparent supporting substrate;
• forming, in a desired pattern on the supporting substrate, at least one color-converting filter layer formed of a resin film containing fluorescent colorant;
• forming a transparent polymeric film layer for covering the color-converting filter layer to be flat;
• forming a transparent inorganic film layer having a thickness d on the polymeric film layer;
• and
• forming transparent electrode layer in at least electrically independent region on the inorganic film layer, the transparent electrode layer having a refractive index higher than that of the inorganic film layer;
• wherein the inorganic film layer is constituted from a laminate of at least two inorganic film layers, and for a wavelength λ in a range from 450 nm to 500 nm inclusive, a refractive index of the inorganic film layer adjacent to the transparent electrode layer is lower than a refractive index of the transparent electrode layer, and refractive indices and thicknesses of (2p−1)th and 2pth inorganic film layers counting from the transparent electrode layer, wherein p is a natural number, satisfy the relationships
• n2p−1<n2p, n2p−1d2p−1=s2p−1λ/4, and n2pd2p=s2pλ/2,
• wherein n is a refractive index of one inorganic film layer, d is a thickness of the one inorganic film layer, and s is a natural number.

A method of manufacturing a color-converting filter substrate, comprising the steps of:

• preparing a transparent supporting substrate;
• forming, in a desired pattern on the supporting substrate, at least one color-converting filter layer formed of a resin film containing fluorescent colorant;
• forming a transparent polymeric film layer for covering the color-converting filter layers to be flat;
• forming a transparent inorganic film layer on the polymeric film layer to have a composition that changes continuously;
• and
• forming a transparent electrode layer in at least one electrically independent region on the inorganic film layer, the transparent electrode layer having a refractive index higher than a refractive index of the inorganic film layer.

A method of manufacturing a color conversion type multi-color display, comprising the steps of:

• preparing a transparent supporting substrate;
• forming, in a desired pattern on the supporting substrate, at least one color-converting filter layer formed of a resin film containing fluorescent colorant;
• forming a transparent polymeric film layer for covering the color-converting filter layer to be flat;
• forming one transparent inorganic film layer on the polymeric film layer, and for a wavelength λin a range from 450 nm to 500 nm inclusive, said inorganic film layer having a film thickness d that satisfies a relationship
• nd=sλ/2,
• wherein n is a refractive index to light of the wavelength λ, and s is a natural number;
• forming a transparent electrode layer in at least one electrically independent region on the inorganic film layer, the transparent electrode layer having a refractive index higher than that of the inorganic film layer;
• forming an organic light-emitting layer containing at least a light-emitting material on the transparent electrode layer;
• and
• forming a second electrode layer on the organic light-emitting layer.

A method of manufacturing a color conversion type multi-color display, comprising the steps of:

• preparing a transparent supporting substrate;
• forming, in a desired pattern on the supporting substrate, at least one color-converting filter layer formed of a resin film containing fluorescent colorant;
• forming a transparent polymeric film layer for covering the color-converting filter layers to be flat;
• forming a transparent inorganic film layer having a thickness d on the polymeric film layer;
• forming a transparent electrode layer in at least one electrically independent region on the inorganic film layer, the transparent electrode layer having a refractive index higher than that of the inorganic film layer;
• forming an organic light-emitting layer containing at least a light-emitting material on the transparent electrode layer;
• and
• forming a second electrode layer on the organic light-emitting layer;
• wherein the inorganic film layer is constituted from a laminate of at least two inorganic film layers, and for a wavelength λ in a range from 450 nm to 500 nm inclusive, a refractive index of the inorganic film layer adjacent to the transparent electrode layer is lower than a refractive index of the transparent electrode layer, and refractive indices and thicknesses of (2p−1)th and 2pth inorganic film layers counting from the transparent electrode layer, wherein p is a natural number, satisfy the relationships
• n2p−1>n2p, n2p−1d2p−1=s2pλ/2, and n2pd2p=s2pλ/4,
• wherein n is a refractive index of one inorganic film layer, d is a thickness of the the inorganic film layer, and s is a natural number.

A method of manufacturing a color conversion type multi-color display, comprising the steps of:

• preparing a transparent supporting substrate;
• forming, in a desired pattern on the supporting substrate, at least one color-converting filter layer formed of a resin film containing fluorescent colorant;
• forming a transparent polymeric film layer for covering the color-converting filter layers to be flat;
• forming a transparent inorganic film layer on the polymeric film layer;
• forming a transparent electrode layer in at least one electrically independent region on the inorganic film layer, the transparent electrode layer having a refractive index higher than that of the inorganic film layer;
• forming an organic light-emitting layer containing at least a light-emitting material on the transparent electrode layer;
• and
• forming second electrode layer on the organic light-emitting layer;
• wherein the inorganic film layer is constituted from a laminate of at least two inorganic film layers, and for a wavelength λ in a range from 450 nm to 500 nm inclusive, the refractive index of the inorganic film layer adjacent to the transparent electrode layer is lower than a refractive index of the transparent electrode layer, and refractive indices and thicknesses of (2p−1)th and 2pth inorganic film layers counting from the transparent electrode layer, wherein p is a natural number, satisfy the relationships
• n2-1<n2p, n2p−1d2p−1=s2p−1λ/4, and n2pd2p=s2pλ/2,
• wherein n is a refractive index of one inorganic film layer, d is a thickness of the one inorganic film layer, and s is a natural number.

A method of manufacturing a color conversion type multi-color display, comprising the steps of:

• preparing a transparent supporting substrate;
• forming, in a desired pattern on the supporting substrate, at least one color-converting filter layer formed of a resin film containing fluorescent colorant;
• forming a transparent polymeric film layer for covering the color-converting filter layers to be flat;
• forming a transparent inorganic film layer having a composition that changes continuously on the polymeric film layer;
• forming a transparent electrode layer in at least one electrically independent region on the inorganic film layer, the transparent electrode layer having a refractive index higher than that of the inorganic film layer;
• forming an organic light-emitting layer containing at least a light-emitting material on the transparent electrode layer;
• and
• forming a second electrode layer on the organic light-emitting layer.