Display device
View Patent ↗A display device includes: an organic layer arranged in plural pixels which are arranged in a display area in a matrix; a first electrode that is formed on a surface of the organic layer opposite to a substrate, and transmits a visible light; a second electrode that holds the organic layer in cooperation with the first electrode, and is lower in the transmittance of the visible light, and higher in the reflectance than the first electrode; an insulating layer that holds the second electrode in cooperation with the organic layer, and higher in the transmittance of the visible light, and lower in the reflectance than the second electrode; and a third electrode that holds the insulating layer in cooperation with the second electrode, is formed across adjacent pixels of the plural pixels, and lower in the transmittance of the visible light, and higher in the reflectance than the second electrode.
1. A display device, comprising:
a substrate;
a plurality of pixels that is arranged in a display area, and includes an organic layer having at least a light emission layer, and a light emitting area;
a first electrode that is formed on an opposite side of the organic layer to the substrate, and transmits a visible light;
a second electrode that holds the organic layer in cooperation with the first electrode, and is lower in the transmittance of the visible light, and higher in the reflectance than the first electrode;
an insulating layer that holds the second electrode in cooperation with the organic layer, and higher in the transmittance of the visible light, and lower in the reflectance than the second electrode; and
a third electrode that holds the insulating layer in cooperation with the second electrode, is formed across adjacent pixels of the plurality of pixels, and lower in the transmittance of the visible light, and higher in the reflectance than the second electrode,
wherein the light emitting area is an area in which the organic layer comes in direct contact with the first electrode and the second electrode, and
the third electrode is formed by stacking molybdenum 90 nm to 110 nm in thickness on aluminum 180 nm to 220 nm in thickness.
2. The display device according to claim 1 , wherein
the third electrode is formed to be larger than the light emitting area when the light emitting area is viewed in a plan view from the first electrode side.
3. The display device according to claim 2 , comprising:
a TFT; and
a second insulating layer that is arranged between the TFT and the third electrode, wherein the insulating layer directly contacts with the TFT.
4. The display device according to claim 1 , wherein
the third electrode is electrically connected to the first electrode.
5. The display device according to claim 4 , wherein
the third electrode is formed to extend from the display area to an outside of the display area, and electrically connected to the first electrode outside of the display area.
6. The display device according to claim 1 , wherein
a light having a wavelength band of 540 nm to 570 nm is smaller than a light having a wavelength band of 455 nm to 490 nm in a reflectance of the light input from the first electrode side in the light emitting area.
7. The display device according to claim 1 , wherein
a reflectance of a light having a wavelength band of 430 nm to 730 nm input from the first electrode side in the light emitting area is minimum in a light included in a wavelength band of 540 nm to 570 nm.
8. The display device according to claim 1 , wherein
the second electrode includes a layer made of a metal material, and a layer made of a conductive material higher in the transmittance of the visible light than the metal material, and
the insulating layer is formed to be thicker than the second electrode, and thinner than the third electrode.
9. The display device according to claim 1 , wherein
the second electrode includes a metal 5 nm to 30 nm in thickness.
10. The display device according to claim 1 , wherein
the second electrode includes at least one of the group consisting of magnesium, aluminum, titanium, chromium, iron, copper, molybdenum, tungsten, silver, and gold.
11. The display device according to claim 1 , wherein
the second electrode is formed by stacking indium tin oxide on molybdenum,
the insulating layer is made of silicon nitride.
12. The display device according to claim 11 , wherein
the second electrode is formed by stacking indium tin oxide 45 nm to 55 nm in thickness on molybdenum 7 nm to 9 nm in thickness, and
the insulating layer is made of silicon nitride 72 nm to 88 nm in thickness.
13. The display device according to claim 11 , wherein
the second electrode further includes indium tin oxide held between the insulating layer and molybdenum.
14. The display device according to claim 11 , wherein the second electrode is formed by stacking indium tin oxide 45 nm to 55 nm in thickness on molybdenum 7 nm to 9 nm in thickness, and
the insulating layer is made of silicon nitride 72 nm to 88 nm in thickness.
15. The display device according to claim 1 , wherein
the first electrode is formed across some of the plurality of pixels.
16. The display device according to claim 1 , wherein
the organic layer is formed across some of the plurality of pixels.
17. A display device, comprising:
a substrate;
a plurality of pixels that is arranged in a display area, and includes an organic layer having at least a light emission layer, and a light emitting area;
a TFT;
a first electrode that is formed on an opposite side of the organic layer to the substrate, and transmits a visible light;
a second electrode that holds the organic layer in cooperation with the first electrode, and is lower in the transmittance of the visible light, and higher in the reflectance than the first electrode;
an insulating layer that holds the second electrode in cooperation with the organic layer, and higher in the transmittance of the visible light, and lower in the reflectance than the second electrode;
a third electrode that holds the insulating layer in cooperation with the second electrode, is formed across adjacent pixels of the plurality of pixels, and lower in the transmittance of the visible light, and higher in the reflectance than the second electrode; and
a second insulating layer that is arranged between the TFT and the third electrode,
wherein a part of the second electrode directly contacts with the TFT,
wherein the insulating layer directly contacts with the TFT,
wherein the light emitting area is an area in which the organic layer comes in direct contact with the first electrode and the second electrode, and
wherein the third electrode is formed by stacking molybdenum 90 nm to 110 nm in thickness on aluminum 180 nm to 220 nm in thickness.
18. The display device according to claim 17 , wherein
the third electrode is formed to be larger than the light emitting area when the light emitting area is viewed in a plan view from the first electrode side.