Organic EL element, organic EL display apparatus, and manufacturing method of organic EL element
First Claim
1. An organic electro-luminescence (EL) element, comprising:
- a substrate; and
a light reflective layer, a first transparent electrode layer, an insulation layer, a hole transport layer, and a plurality of banks being stacked above the substrate;
a luminous function layer above the hole transport layer in a recess defined by the plurality of banks; and
a second transparent electrode layer above the luminous function layer,wherein the light reflective layer, the first transparent electrode layer, the insulation layer, and the hole transport layer are stacked above the substrate in a region isolated by the plurality of banks,the plurality of banks comprises a material that absorbs incident light of a predetermined wavelength during a process of forming the plurality of banks by exposing a photosensitive resin layer to the incident light, the process of forming the plurality of banks defining the recess for the luminous function layer,the first transparent electrode layer, the insulation layer, and the hole transport layer are part of an optical multilayer film, each having a reflectance value that is between a local minimum value and a neighborhood value of the local minimum value, the reflectance value being a ratio of reflection of the incident light that is reflected from the light reflective layer toward the photosensitive resin layer to the incident light that is directed from the photosensitive resin layer toward the light reflective layer during the process of forming the plurality of banks, andthe predetermined wavelength is λ and
satisfies;
d1=1/n1×
4.0a×
λ
/4;
d2=1/n2×
1.0a×
λ
/4;
d3=1/n3×
7.0a×
λ
/4; and
d4=1/n4×
5.0a×
λ
/4, whereind1 is a thickness of the first transparent electrode layer,d2 is a thickness of the hole transport layer,d3 is a thickness of the insulation layer,d4 is a thickness of the plurality of banks above the hole transport layer,n1 is a refractive index of the first transparent electrode layer,n2 is a refractive index of the hole transport layer,n3 is a refractive index of the insulation layer,n4 is a refractive index of the photosensitive resin layer from which the plurality of banks is formed, anda is a predetermined constant.
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Accused Products
Abstract
An organic EL element includes a substrate and a light refractive layer, a first transparent electrode layer, an insulation layer, a hole transport layer, and a photosensitive resin layer stacked above the substrate. A luminous function layer is above the hole transport layer in a recess defined by the photosensitive resin layer. A second transparent electrode layer is above the luminous function layer. The light reflective layer, the first transparent electrode layer, the insulation layer, and the hole transport layer are formed above the substrate in a region isolated by the photosensitive resin layer. The photosensitive resin layer comprises a material that absorbs incident light of a predetermined wavelength. The first transparent electrode layer, the insulation layer, the hole transport layer, and the photosensitive resin layer each have a reflectance value that is between a local minimum value and a neighborhood value of the local minimum value.
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Citations
16 Claims
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1. An organic electro-luminescence (EL) element, comprising:
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a substrate; and a light reflective layer, a first transparent electrode layer, an insulation layer, a hole transport layer, and a plurality of banks being stacked above the substrate; a luminous function layer above the hole transport layer in a recess defined by the plurality of banks; and a second transparent electrode layer above the luminous function layer, wherein the light reflective layer, the first transparent electrode layer, the insulation layer, and the hole transport layer are stacked above the substrate in a region isolated by the plurality of banks, the plurality of banks comprises a material that absorbs incident light of a predetermined wavelength during a process of forming the plurality of banks by exposing a photosensitive resin layer to the incident light, the process of forming the plurality of banks defining the recess for the luminous function layer, the first transparent electrode layer, the insulation layer, and the hole transport layer are part of an optical multilayer film, each having a reflectance value that is between a local minimum value and a neighborhood value of the local minimum value, the reflectance value being a ratio of reflection of the incident light that is reflected from the light reflective layer toward the photosensitive resin layer to the incident light that is directed from the photosensitive resin layer toward the light reflective layer during the process of forming the plurality of banks, and the predetermined wavelength is λ and
satisfies;
d1=1/n1×
4.0a×
λ
/4;
d2=1/n2×
1.0a×
λ
/4;
d3=1/n3×
7.0a×
λ
/4; and
d4=1/n4×
5.0a×
λ
/4, whereind1 is a thickness of the first transparent electrode layer, d2 is a thickness of the hole transport layer, d3 is a thickness of the insulation layer, d4 is a thickness of the plurality of banks above the hole transport layer, n1 is a refractive index of the first transparent electrode layer, n2 is a refractive index of the hole transport layer, n3 is a refractive index of the insulation layer, n4 is a refractive index of the photosensitive resin layer from which the plurality of banks is formed, and a is a predetermined constant. - View Dependent Claims (2, 3, 4, 5)
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6. An organic electro-luminescence (EL) element, comprising:
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a substrate; a reflective layer, a first transparent electrode layer, a hole transport layer, and a plurality of banks that are stacked above the substrate; a luminous function layer above the hole transport layer in a recess defined by the plurality of banks; and a second transparent electrode layer above the luminous function layer, wherein the light reflective layer, the first transparent electrode layer, and the hole transport layer are stacked above the substrate in a region isolated by the plurality of banks, the plurality of banks comprises a material that absorbs incident light of a predetermined wavelength during a process of forming the plurality of banks by exposing a photosensitive resin layer to the incident light, the process of forming the plurality of banks defining the recess for the luminous function layer, the first transparent electrode layer and the hole transport layer are part of an optical multilayer film, each having a reflectance value that is between a local minimum value and a neighborhood value of the local minimum value, the reflectance value being a ratio of reflection of the incident light that is reflected from the light reflective layer toward the photosensitive resin layer to the incident light that is directed from the photosensitive resin layer toward the light reflective layer during the process of forming the plurality of banks, and the predetermined wavelength is λ and
satisfies;
d1=1/n1×
1.8a×
λ
/4;
d2=1/n2×
0.8a×
λ
/4; and
d4=1/n4×
0.2a×
λ
/4, whereind1 is the thickness of the first transparent electrode layer, d2 is the thickness of the hole transport layer, d4 is the thickness of the plurality of banks above the hole transport layer, n1 is a refractive index of the first transparent electrode layer, n2 is a refractive index of the hole transport layer, n4 is a refractive index of the photosensitive resin layer from which the plurality of banks is formed, and a is a predetermined constant. - View Dependent Claims (7, 8, 9, 10)
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11. A method of manufacturing an organic electro-luminescence (EL) element, comprising:
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stacking, above a substrate, a reflective layer, a first transparent electrode layer having a thickness of d1 and a refractive index of n1, an insulation layer having a thickness of d3 and a refractive index of n3, a hole transport layer having a thickness of d2 and a refractive index of n2, and a photosensitive resin layer having a thickness of d4 and a refractive index of n4; removing a portion of the photosensitive resin layer by irradiating the photosensitive resin layer with light of a predetermined wavelength; providing a luminous function layer in a recess formed when the portion of the photosensitive resin layer is removed; and providing a second transparent electrode layer above the luminous function layer, wherein the light reflective layer, the first transparent electrode layer, the insulation layer, and the hole transport layer are stacked above the substrate in a region isolated by the photosensitive resin layer, the photosensitive resin layer comprises a material that absorbs incident light of the predetermined wavelength when the portion of the photosensitive resin layer is removed, the first transparent electrode layer, the insulation layer, the hole transport layer, and the photosensitive resin layer are an optical multilayer film, each having a reflectance value that is between a local minimum value and a neighborhood value of the local minimum value, the reflectance value being a ratio of reflection of the incident light that is reflected from the light reflective layer toward the photosensitive resin layer to the incident light that is directed from the photosensitive resin layer toward the light reflective layer, and the predetermined wavelength is λ and
satisfies;
d1=1/n1×
4.0a×
λ
/4;
d2=1/n2×
1.0a×
λ
/4;
d3=1/n3×
7.0a×
λ
/4; and
d4=1/n4×
5.0a×
λ
/4, whereina is a predetermined constant. - View Dependent Claims (12, 13)
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14. A method of manufacturing an organic electro-luminescence (EL) element, comprising:
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stacking, on a substrate, a light reflective layer, a first transparent electrode layer having a thickness of d1 and a refractive index of n1, a hole transport layer having a thickness of d2 and a refractive index of n2, and a photosensitive resin layer having a thickness of d4 and a refractive index of n4; removing a portion of the photosensitive resin layer by irradiating the photosensitive resin layer with light of a predetermined wavelength; providing a luminous function layer in a recess formed when the portion of the photosensitive resin layer is removed; and providing a second transparent electrode layer above the luminous function layer, wherein the light reflective layer, the first transparent electrode layer, and the hole transport layer are stacked above the substrate in a region isolated by the photosensitive resin layer, the photosensitive resin layer comprises a material that absorbs incident light of the predetermined wavelength when the portion of the photosensitive resin layer is removed, the first transparent electrode layer, the hole transport layer, and the photosensitive resin layer are an optical multilayer film, each having a reflectance value that is between a local minimum value and a neighborhood value of the local minimum value, the reflectance value being a ratio of reflection of the incident light that is reflected from the light reflective layer toward the photosensitive resin layer to the incident light that is directed from the photosensitive resin layer toward the light reflective layer, and the predetermined wavelength is λ and
satisfies;
d1=1/n1×
1.8a×
λ
/4;
d2=1/n2×
0.8a×
λ
/4; and
d4=1/n4×
0.2a×
λ
/4, whereina is a predetermined constant. - View Dependent Claims (15, 16)
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Specification