Organic electroluminescent display device

Patent metadata

Field	Value
Publication number	US-9437659-B2
Application number	US-201414469623-A
Country	US
Kind code	B2
Filing date	Aug 27, 2014
Priority date	Aug 29, 2013
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

An organic electroluminescent display device includes: a substrate; plural anodes that are formed in respective pixels; pixel separation films that cover at least an edge of the respective anodes between the respective pixels; an organic layer that covers a display area over the plurality of anodes, and the pixel separation films, and includes at least a light emitting layer; a cathode that is formed on the organic layer; and a counter substrate that is arranged on the cathode so as to face the substrate, in which the anodes each include: a contact area that comes in contact with the organic layer, and faces a corresponding pixel of the counter substrate, and a peripheral area that is formed around the contact area, and faces pixels around the corresponding pixels of the counter substrate. The organic electroluminescent display device can realize higher definition, higher luminance, and prevention of color mixture.

First claim

What is claimed is:

1. An organic electroluminescent display device, comprising:
a substrate;
a plurality of anodes that are formed in respective pixels arranged in a display area of the substrate in a matrix;
pixel separation films that are made of an insulating material, and cover at least an edge of the respective anodes between the respective pixels;
an organic layer that is made of an organic material, covers the display area over the plurality of anodes, and the pixel separation films, and includes at least a light emitting layer;
a cathode that is formed on the organic layer;
a counter substrate that is arranged on the cathode so as to face the substrate;
a plurality of thin film transistors each electrically connected with each of the anodes; and
an insulating film that is arranged between the substrate and the anodes, and has a groove portion between the respective pixels, the groove portion being recessed toward the substrate,
wherein the anodes each include:
a contact area that comes in contact with the organic layer, and faces a corresponding pixel of the counter substrate, and
a peripheral area that is formed around the contact area, and faces pixels around the corresponding pixels of the counter substrate, and
wherein the peripheral area extends along the groove portion and is not in contact with an electrode of one of the thin film transistors.

2. The organic electroluminescent display device according to claim 1 ,
wherein the peripheral area faces the pixel adjacent to the corresponding pixel of the counter substrate.

3. The organic electroluminescent display device according to claim 1 ,
wherein the insulating film is separated for each of the pixels.

4. The organic electroluminescent display device according to claim 1 ,
wherein the pixel separation films each cover at least a part of the groove portion.

5. The organic electroluminescent display device according to claim 1 ,
wherein the counter substrate is a color filter substrate.

6. The organic electroluminescent display device according to claim 1 ,
wherein the anodes includes a first anode and a second anode that is adjacent to the first anode,
both the peripheral area of the first anode and the peripheral area of the second anode are located on the groove portion together.

Assignees

• Japan Display Inc

Inventors

• Sato Toshihiro

Classifications

• H01L27/3246 Primary

  Electricity · mapped topic

• H01L51/5209

  Electricity · mapped topic

• H10K59/38

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

• H10K50/813

  characterised by their shape · CPC title

• H10K59/122 Primary

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