Display device, manufacturing method thereof, and electronic device

Patent metadata

Field	Value
Publication number	US-9343515-B2
Application number	US-201414215692-A
Country	US
Kind code	B2
Filing date	Mar 17, 2014
Priority date	Mar 21, 2013
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A display device that includes a reflective electrode; a transparent electrode; a partition; an EL layer formed over the partition and the transparent electrode; a semi-transmissive electrode formed over the EL layer; and a coloring layer over the semi-transmissive electrode. A light-emitting region is formed to overlap with the transparent electrode, the EL layer, the semi-transmissive electrode, and the coloring layer. A non-light-emitting region is formed to overlap with the transparent electrode, the partition, the EL layer, and the coloring layer. The non-light-emitting region is formed to surround the light-emitting region. The sum of the optical length of the transparent electrode and the optical length of the EL layer is adjusted to fulfill a condition of a microcavity intensifying light of the color of the coloring layer. The optical length of the partition in the non-light-emitting region is adjusted to weaken external light incident through the coloring layer.

First claim

What is claimed is:

1. A display device comprising:
a reflective electrode;
a transparent electrode over the reflective electrode;
a partition surrounding the transparent electrode and the reflective electrode and overlapping the transparent electrode;
a layer containing a light-emitting organic compound over the partition and the transparent electrode;
a semi-transmissive electrode over the layer containing the light-emitting organic compound; and
a coloring layer over the semi-transmissive electrode,
wherein a light-emitting region is provided in a region which overlaps the transparent electrode, the layer containing the light-emitting organic compound, the semi-transmissive electrode, and the coloring layer,
wherein a non-light-emitting region is provided in a region which overlaps the transparent electrode, the partition, the layer containing the light-emitting organic compound, and the coloring layer,
wherein the non-light-emitting region surrounds the light-emitting region,
wherein a sum of an optical length of the transparent electrode and an optical length of the layer containing the light-emitting organic compound is adjusted to fulfill a condition of a microcavity intensifying light of a color of the coloring layer, and
wherein an optical length of the partition in the non-light-emitting region is adjusted to weaken external light incident through the coloring layer.

2. The display device according to claim 1 , wherein the optical length of the partition in the non-light-emitting region is adjusted to a multiple of a ½ wavelength of a wavelength of the color of the coloring layer.

3. The display device according to claim 2 , wherein the color of the coloring layer is green.

4. An electronic device comprising the display device according to claim 1 .

5. A display device comprising:
a reflective electrode;
a transparent electrode over the reflective electrode;
a partition surrounding the transparent electrode and the reflective electrode;
a layer containing a light-emitting organic compound over the transparent electrode;
a semi-transmissive electrode over the layer containing the light-emitting organic compound; and
a coloring layer over the semi-transmissive electrode and the partition,
wherein the partition is a stacked-layer film including a first insulating layer and a second insulating layer with different refractive indices,
wherein a light-emitting region is provided in a region which overlaps the transparent electrode, the layer containing the light-emitting organic compound, the semi-transmissive electrode, and the coloring layer,
wherein a non-light-emitting region is provided in a region which overlaps the transparent electrode, the partition, the layer containing the light-emitting organic compound, and the coloring layer,
wherein the non-light-emitting region surrounds the light-emitting region,
wherein a sum of an optical length of the transparent electrode and an optical length of the layer containing the light-emitting organic compound is adjusted to fulfill a condition of a microcavity intensifying light of a color of the coloring layer, and
wherein an optical length of the second insulating layer in the non-light-emitting region is adjusted to weaken external light incident through the coloring layer.

6. The display device according to claim 5 ,
wherein when the refractive index of the first insulating layer is smaller than the refractive index of the second insulating layer, the optical length of the second insulating layer is adjusted to a sum of the optical length of the transparent electrode and a wavelength of the color of the coloring layer multiplied by (2N−1)/4 (N is a natural number), and
wherein when the refractive index of the first insulating layer is larger than the refractive index of the second insulating layer, the optical length of the second insulating layer is adjusted to a sum of the optical length of the transparent electrode and a multiple of a ½ wavelength of the wavelength of the color of the coloring layer.

7. The display device according to claim 6 , wherein a difference between the refractive index of the first insulating layer and the refractive index of the second insulating layer is 0.1 or more.

8. The display device according to claim 5 , wherein the color of the coloring layer is green.

9. An electronic device comprising the display device according to claim 5 .

10. A display device comprising:
a first reflective electrode and a second reflective electrode;
a first transparent electrode over the first reflective electrode;
a second transparent electrode over the second reflective electrode;
a first partition surrounding the first reflective electrode and the first transparent electrode over the first transparent electrode;
a second partition surrounding the second reflective electrode and the second transparent electrode over the second transparent electrode;
a layer containing a light-emitting organic compound over the first partition, the second partition, the first transparent electrode, and the second transparent electrode;
a semi-transmissive electrode over the layer containing the light-emitting organic compound; and
a first coloring layer and a second coloring layer over the semi-transmissive electrode,
wherein a first light-emitting region is provided in a region which overlaps the first transparent electrode, the layer containing the light-emitting organic compound, the semi-transmissive electrode, and the first coloring layer,
wherein a first non-light-emitting region is provided in a region which overlaps the first transparent electrode, the first partition, the layer containing the light-emitting organic compound, and the first coloring layer,
wherein the first non-light-emitting region surrounds the first light-emitting region,
wherein a sum of an optical length of the first transparent electrode and an optical length of the layer containing the light-emitting organic compound is adjusted to fulfill a condition of a microcavity intensifying light of a color of the first coloring layer,
wherein an optical length of the first partition is adjusted to weaken external light incident through the first coloring layer,
wherein a second light-emitting region is provided in a region which overlaps the second transparent electrode, the layer containing the light-emitting organic compound, the semi-transmissive electrode, and the second coloring layer,
wherein a second non-light-emitting region is provided in a region which overlaps the second transparent electrode, the second partition, the layer containing the light-emitting organic compound, and the second coloring layer,
wherein the second non-light-emitting region surrounds the second light-emitting region,
wherein a sum of an optical length of the second transparent electrode and the optical length of the layer containing the light-emitting organic compound is adjusted to fulfill a condition of a microcavity intensifying light of a color of the second coloring layer, and
wherein an optical length of the second partition is adjusted to weaken external light incident through the second coloring layer.

11. The display device according to claim 10 ,
wherein the optical length of the first partition is adjusted to a multiple of a ½ wavelength of a wavelength of the color of the first coloring layer, and
wherein the optical length of the second partition is adjusted to a multiple of a ½ wavelength of a wavelength of the color of the second coloring layer.

12. The display device according to claim 10 ,
wherein the first partition comprises a first insulating layer,
wherein an optical length of the first i

Assignees

• Sugisawa Nozomu
• Ikeda Hisao
• Kikuchi Katsuhiro
• Niboshi Manabu
• Inoue Satoshi
• Tsukamoto Yuto
• Kawato Shinichi
• Semiconductor Energy Lab
• Sharp Kk

Inventors

• Sugisawa Nozomu
• Ikeda Hisao
• Kikuchi Katsuhiro
• Niboshi Manabu
• Inoue Satoshi
• Tsukamoto Yuto
• Kawato Shinichi

Classifications

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/876

  comprising a resonant cavity structure, e.g. Bragg reflector pair · CPC title

• H10K59/80518

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H01L51/5265

  Electricity · mapped topic

• H01L51/5281

  Electricity · mapped topic