Light-emitting device and display device
First Claim
1. A light-emitting device comprising:
- a first element comprising;
a first color filter layer; and
a first light-emitting element,wherein the first light-emitting element comprises;
a first electrode having a reflective property;
a first light-emitting layer over the first electrode; and
a second light-emitting layer over the first light-emitting layer; and
a second element comprising;
a second color filter layer; and
a second light-emitting element,wherein the second light-emitting element comprises;
a second electrode having a reflective property;
the first light-emitting layer over the second electrode; and
the second light-emitting layer over the first light-emitting layer,wherein a first optical path length is an optical path length between the first electrode and the first light-emitting layer, and the first optical path length is one-quarter of a first central wavelength of a first wavelength range in which the first color filter layer has a transmittance of 50% or higher in the visible light range,wherein a second optical path length is an optical path length between the second electrode and the second light-emitting layer, and the second optical path length is m-quarters of a second central wavelength of a second wavelength range in which the second color filter layer has a transmittance of 50% or higher in the visible light range,wherein m is an odd number of three or more, andwherein a wavelength of a color of light emitted from the first light-emitting layer is shorter than a wavelength of a color of light emitted from the second light-emitting layer.
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Abstract
A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is positioned to the electrode having a reflective property, the shorter the wavelength of light emitted from the light-emitting layer is.
67 Citations
44 Claims
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1. A light-emitting device comprising:
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a first element comprising; a first color filter layer; and a first light-emitting element, wherein the first light-emitting element comprises; a first electrode having a reflective property; a first light-emitting layer over the first electrode; and a second light-emitting layer over the first light-emitting layer; and a second element comprising; a second color filter layer; and a second light-emitting element, wherein the second light-emitting element comprises; a second electrode having a reflective property; the first light-emitting layer over the second electrode; and the second light-emitting layer over the first light-emitting layer, wherein a first optical path length is an optical path length between the first electrode and the first light-emitting layer, and the first optical path length is one-quarter of a first central wavelength of a first wavelength range in which the first color filter layer has a transmittance of 50% or higher in the visible light range, wherein a second optical path length is an optical path length between the second electrode and the second light-emitting layer, and the second optical path length is m-quarters of a second central wavelength of a second wavelength range in which the second color filter layer has a transmittance of 50% or higher in the visible light range, wherein m is an odd number of three or more, and wherein a wavelength of a color of light emitted from the first light-emitting layer is shorter than a wavelength of a color of light emitted from the second light-emitting layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A light-emitting device comprising:
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a first element comprising; a first color filter layer; and a first light-emitting element, wherein the first light-emitting element comprises; a first electrode having a reflective property; a first light-emitting layer over the first electrode; and a second light-emitting layer over the first light-emitting layer; and a second element comprising; a second color filter layer; and a second light-emitting element, wherein the second light-emitting element comprises; a second electrode having a reflective property; the first light-emitting layer over the second electrode; and the second light-emitting layer over the first light-emitting layer, wherein a first optical path length is an optical path length between a surface of the first electrode and a lower surface of the first light-emitting layer or more and an optical path length between the surface of the first electrode and an upper surface of the first light-emitting layer or less, wherein the first optical path length is one-quarter of a first central wavelength of a first wavelength range in which the first color filter layer has a transmittance of 50% or higher in the visible light range, wherein a second optical path length is an optical path length between a surface of the second electrode and a lower surface of the second light-emitting layer or more and an optical path length between the surface of the second electrode and an upper surface of the second light-emitting layer or less, wherein the second optical path length is m-quarters of a second central wavelength of a second wavelength range in which the second color filter layer has a transmittance of 50% or higher in the visible light range, wherein m is an odd number of three or more, and wherein a wavelength of a color of light emitted from the first light-emitting layer is shorter than a wavelength of a color of light emitted from the second light-emitting layer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A light-emitting device comprising:
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a first element comprising; a first color filter layer; and a first light-emitting element, wherein the first light-emitting element comprises; a first electrode having a reflective property; a first light-emitting layer over the first electrode; a second light-emitting layer over the first light-emitting layer; and a third light-emitting layer over the second light-emitting layer; a second element comprising; a second color filter layer; and a second light-emitting element, wherein the second light-emitting element comprises; a second electrode having a reflective property; the first light-emitting layer over the second electrode; the second light-emitting layer over the first light-emitting layer; and the third light-emitting layer over the second light-emitting layer; and a third element comprising; a third color filter layer; and a third light-emitting element, wherein the third light-emitting element comprises; a third electrode having a reflective property; the first light-emitting layer over the third electrode; the second light-emitting layer over the first light-emitting layer; and the third light-emitting layer over the second light-emitting layer, wherein a first optical path length is an optical path length between the first electrode and the first light-emitting layer, and the first optical path length is one-quarter of a first central wavelength of a first wavelength range in which the first color filter layer has a transmittance of 50% or higher in the visible light range, wherein a second optical path length is an optical path length between the second electrode having a reflective property and the second light-emitting layer in the second element, and the second optical path length is m-quarters of a second central wavelength of a second wavelength range in which the second color filter layer has a transmittance of 50% or higher in the visible light range, wherein a third optical path length is an optical path length between the third electrode having a reflective property and the third light-emitting layer in the third element, and the third optical path length is n-quarters of a third central wavelength of a third wavelength range in which the third color filter layer has a transmittance of 50% or higher in the visible light range, wherein m is an odd number of three or more, and n is an odd number of three or more, wherein a wavelength of a color of light emitted from the first light-emitting layer is shorter than a wavelength of a color of light emitted from the second light-emitting layer, and wherein a wavelength of a color of light emitted from the second light-emitting layer is shorter than a wavelength of a color of light emitted from the third light-emitting layer. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A light-emitting device comprising:
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a first element comprising; a first color filter layer; and a first light-emitting element, wherein the first light-emitting element comprises; a first electrode having a reflective property; a first light-emitting layer over the first electrode; a second light-emitting layer over the first light-emitting layer; and a third light-emitting layer over the second light-emitting layer; a second element comprising; a second color filter layer; and a second light-emitting element, wherein the second light-emitting element comprises; a second electrode having a reflective property; the first light-emitting layer over the second electrode; the second light-emitting layer over the first light-emitting layer; and the third light-emitting layer over the second light-emitting layer; and a third element comprising; a third color filter layer; and a third light-emitting element, wherein the third light-emitting element comprises; a third electrode having a reflective property; the first light-emitting layer over the third electrode; the second light-emitting layer over the first light-emitting layer; and the third light-emitting layer over the second light-emitting layer, wherein a first optical path length is an optical path length between a surface of the first electrode and a lower surface of the first light-emitting layer or more and an optical path length between the surface of the first electrode and an upper surface of the first light-emitting layer or less, wherein the first optical path length is one-quarter of a first central wavelength of a first wavelength range in which the first color filter layer has a transmittance of 50% or higher in the visible light range, wherein a second optical path length is an optical path length between a surface of the second electrode and a lower surface of the second light-emitting layer or more and an optical path length between the surface of the second electrode and an upper surface of the second light-emitting layer or less, wherein the second optical path length is m-quarters of a second central wavelength of a second wavelength range in which the second color filter layer has a transmittance of 50% or higher in the visible light range, wherein a third optical path length is an optical path length between a surface of the third electrode and a lower surface of the third light-emitting layer or more and an optical path length between the surface of the third electrode and an upper surface of the third light-emitting layer or less, wherein the third optical path length is n-quarters of a third central wavelength of a third wavelength range in which the third color filter layer has a transmittance of 50% or higher in the visible light range, wherein m is an odd number of three or more, and n is an odd number of three or more, wherein a wavelength of a color of light emitted from the first light-emitting layer is shorter than a wavelength of a color of light emitted from the second light-emitting layer, and wherein a wavelength of a color of light emitted from the second light-emitting layer is shorter than a wavelength of a color of light emitted from the third light-emitting layer. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification