Manufacturing method of an organic electroluminescence display device and the organic electroluminescence display device

Patent metadata

Field	Value
Publication number	US-9577014-B2
Application number	US-201514657363-A
Country	US
Kind code	B2
Filing date	Mar 13, 2015
Priority date	Mar 20, 2014
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A manufacturing method of an organic electroluminescence display device including a device substrate provided with a plurality of pixel electrodes which have a gap part therebetween, a common electrode disposed opposite to the plurality of pixel electrodes, a light emitting layer provided over the plurality of pixel electrodes, and a bank layer provided in the gap part of the plurality of pixel electrodes, the method comprising forming a cover layer including a concave region to fit into a convex shaped part of the bank layer at a support substrate, forming a color filter layer facing the pixel electrode to the concave region, disposing a surface of the color filter layer on the device substrate so that the concave region fits into a convex shaped part, and attaching the cover layer and the color filter layer on the device substrate by peeling the cover layer from the support substrate.

First claim

What is claimed is:

1. An organic electroluminescence display device comprising:
a substrate provided with a plurality of pixels;
a plurality of pixel electrodes formed over the substrate, each of the pixel electrodes being formed in each of the pixels;
a bank layer located in a gap part between the plurality of pixels and exposing the pixel electrode;
a light emitting layer located on a side of the pixel electrode, the side being opposite to the substrate;
a common electrode located on a side of the light emitting layer, and provided over the plurality of pixels and the bank layer, the side being opposite to the substrate;
a color filter layer located on a side of the common electrode, and provided over the bank layer and one of the plurality of pixels, the side being opposite to the substrate; and
a cover layer located on a side of the color filter and provided over the plurality of pixels and the bank layer, the side being opposite to the substrate,
wherein each of the plurality of pixel electrodes includes an exposure area exposed by the bank layer, and
a surface of the color filter layer has a convex shape protruding towards the substrate at a position facing the exposure area, the surface facing the common electrode.

2. The organic electroluminescence display device according to claim 1 , wherein the light emitting layer is provided over the plurality of pixels and the bank layer.

3. The organic electroluminescence display device according to claim 1 , wherein the plurality of pixels include a first pixel and a second pixel adjacent to the first pixel,
the color filter layer includes a first color filter layer and a second color filter layer;
the first pixel is provided with the first color filter layer;
the second pixel is provided with the second color filter layer; and
the first color filter layer and the second color filter layer overlap at an upper surface part of the bank layer positioned in a gap part between the first pixel and the second pixel.

4. The organic electroluminescence display device according to claim 3 , wherein the cover layer includes a concave part dented towards an opposite side of the substrate at a position facing the upper surface part.

5. The organic electroluminescence display device according to claim 3 , wherein a third pixel is further provided adjacent to the second pixel;
the second color filter layer is provided not to overlap a color filter layer different to the second color filter layer at an upper surface part of the bank layer positioned in a gap part between the second pixel and the third pixel;
the bank layer positioned in the gap part between the first pixel and the second pixel includes a first height;
the bank layer located in the gap part between the second pixel and the third pixel includes a second height; and
 the second height is larger than the first height.

6. The organic electroluminescence display device according to claim 1 , wherein the color filter layer includes a first area facing an upper surface part of the bank layer, a second area facing the pixel electrode, and a third area facing a side surface part of the bank layer and linking the first area and second area, and the second area is nearer to the substrate than the first area.

7. The organic electroluminescence display device according to claim 1 , wherein a sealing film is provided between the common electrode and the color filter layer.

8. The organic electroluminescence display device according to claim 7 , wherein the sealing layer is formed in the silicon nitride.

9. The organic electroluminescence display device according to claim 1 , wherein the cover layer is formed using an organic resin material.

10. The organic electroluminescence display device according to claim 1 , wherein the cover layer includes a convex part protruding towards the substrate at a position facing the exposure area.

11. The organic electroluminescence display device according to claim 1 , wherein the color filter layer includes a convex part having the convex shape.

12. The organic electroluminescence display device according to claim 1 , wherein the bank layer and the exposure area form a concave-convex shape, the common electrode includes a concave part formed in the concave-convex shape at a position facing the exposure area, and the color filter layer fills the concave part.

13. An organic electroluminescence display device comprising:
a substrate provided with a plurality of pixels;
a plurality of pixel electrodes formed over the substrate, each of the pixel electrodes being formed in each of the pixels;
a bank layer located in a gap part between the plurality of pixels and exposing the pixel electrode;
a light emitting layer located on a side of the pixel electrode, the side being opposite to the substrate;
a common electrode located on a side of the light emitting layer, and provided over the plurality of pixels and the bank layer, the side being opposite to the substrate;
a color filter layer located on a side of the common electrode, and provided over the bank layer and one of the plurality of pixels, the side being opposite to the substrate;
wherein each of the plurality of pixel electrodes includes an exposure area exposed by the bank layer; and
a surface of the color filter layer has a convex shape protruding towards the substrate at a position facing the exposure area, the surface facing the common electrode, and the color filter layer includes a convex part having the convex shape,
wherein the bank layer and the exposure area form a concave-convex shape, the common electrode includes a concave part formed in the concave-convex shape at a position facing the exposure area, and the color filter layer fills the concave part.

14. The organic electroluminescence display device according to claim 13 , wherein the plurality of pixels include a first pixel and a second pixel adjacent to the first pixel,
the color filter layer includes a first color filter layer and a second color filter layer;
the first pixel is provided with the first color filter layer;
the second pixel is provided with the second color filter layer; and
the first color filter layer and the second color filter layer overlap at an upper surface part of the bank layer positioned in a gap part between the first pixel and the second pixel.

15. The organic electroluminescence display device according to claim 13 further comprising:
a cover layer positioned on an opposite side to the substrate of the color filter layer and is provided over the plurality of pixels and the bank layer.

Assignees

• Japan Display Inc

Inventors

• Ishii Yoshinori
• Sato Toshihiro

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• H01L27/322

  Electricity · mapped topic

• H01L51/5284

  Electricity · mapped topic