ORGANIC EL DISPLAY DEVICE

• US 20160043346A1
• Filed: 08/10/2015
• Published: 02/11/2016
• Est. Priority Date: 08/11/2014
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: KAMIYA, Akinori, Fukuda, Kaichi, Kato, Daisuke
• Granted Patent: US 9,425,429 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/8731 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers

Abstract

A bank layer includes projecting portions swollen toward in a thickness direction of a first substrate in an adhesion area. A multi-barrier includes a portion, in which a organic barrier is not disposed, on an upper side of the projecting portions. Therefore, it is possible to obtain, in the adhesion area, a portion in which a first inorganic barrier layer and a second inorganic barrier layer directly come in contact with each other. In an organic EL display device including the multi-barrier formed of an organic material and an inorganic material, it is possible to prevent two facing substrates from being separated from each other.

Claims

1. An organic EL display device comprising:

a first substrate;

a second substrate facing the first substrate;

a sealing material disposed between the first substrate and the second substrate;

an adhesion area overlapping a position of the sealing material in planar view of the first substrate and the second substrate;

an organic layer formed on the first substrate, and including a light emitting layer;

a multi-barrier formed on the first substrate to cover the organic layer, and includes

a first inorganic barrier layer formed of an inorganic material,

an organic barrier formed of an organic material and disposed on an upper side of the first inorganic barrier layer,

a second inorganic barrier layer formed of an inorganic material and covering the organic barrier and the first inorganic barrier layer, and

a portion formed in the adhesion area; and

a projecting portion formed on the first substrate, and projected toward the second substrate,

wherein at least a portion of the projecting portion is located in the adhesion area, and is covered with the multi-barrier, and

wherein the multi-barrier includes a portion in which the organic barrier is not disposed on the upper side of the at least a portion of the projecting portion.

2. The organic EL display device according to claim 1,

wherein the first substrate includes a pixel electrode which is provided in each of a plurality of pixels, and

wherein the projecting portion is formed in a bank layer including a partition wall that is disposed between two adjacent pixel electrodes.

3. The organic EL display device according to claim 1,

wherein a plurality of projecting portions arranged in a direction parallel to the first substrate and the second substrate are formed as the projecting portion.

4. The organic EL display device according to claim 3,

wherein the plurality of projecting portions includes a first projecting portion and a second projecting portion,

wherein the organic barrier includes a portion positioned between the first projecting portion and the second projecting portion, and

wherein a thickness of the portion of the organic barrier is smaller than a height of the first projecting portion and the second projecting portion.

5. The organic EL display device according to claim 1,

wherein the projecting portion surrounds a display area.

6. The organic EL display device according to claim 5,

wherein the projecting portion is formed into a wall shape which extends along the sealing material.

7. The organic EL display device according to claim 1,

wherein the first substrate is provided with a planarization film,

wherein the planarization film includes an opening extending along the sealing material in the adhesion area, and

wherein the projecting portion is formed on the planarization film, and includes a portion which is formed in the opening of the planarization film.

8. The organic EL display device according to claim 7,

wherein the projecting portion is formed in the opening of the planarization film.

9. The organic EL display device according to claim 8,

wherein a plurality of projecting portions arranged in a direction parallel to the first substrate and the second substrate are formed as the projecting portion formed in the opening of the planarization film.

10. The organic EL display device according to claim 1,

wherein the first inorganic barrier layer and the second inorganic barrier layer come in contact with each other in an area overlapping the projecting portion on the multi-barrier.