ORGANIC EL DISPLAY DEVICE AND METHOD OF MANUFACTURING ORGANIC EL DISPLAY DEVICE

• US 20170365809A1
• Filed: 03/31/2017
• Published: 12/21/2017
• Est. Priority Date: 06/17/2016
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: MATSUMOTO, Yukio, KOKAME, Hiraaki
• Granted Patent: US 10,910,591 B2
• Time in Patent Office: Days
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/87 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

An organic EL display device according to an embodiment of the present invention includes a substrate on which a display region including a plurality of pixels including an organic EL layer and an external region that surrounds the display region are formed, at least one separating wall that is formed at a part of the external region on the substrate, and an organic layer that covers at least a part of the display region, includes an organic material, and is formed on a display region side of the at least one separating wall. A wall surface of the display region side of the at least one separating wall includes an inclined surface that is inclined toward the display region side as it is extended away from the substrate.

Claims

1. An organic EL display device comprising:

a substrate on which a display region comprising a plurality of pixels comprising an organic EL layer and an external region that surrounds the display region are formed;

at least one separating wall that is formed at a part of the external region on the substrate; and

an organic layer that covers at least a part of the display region, includes an organic material, and is formed on a display region side of the at least one separating wall,

wherein a wall surface of the display region side of the at least one separating wall comprises an inclined surface that is inclined toward the display region side as it is extended away from the substrate.

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

wherein the pixels comprise a first electrode formed on a side of the organic EL layer opposite from the substrate, and

the organic layer is formed on the substrate on a side of a first inorganic film opposite from the substrate, the first inorganic film being formed on a side of the first electrode opposite from the substrate and composed of an inorganic material.

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

wherein a second inorganic film that integrally covers the organic layer and the at least one separating wall and is composed of an inorganic material is formed.

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

wherein the at least one separating wall surrounds a whole periphery of the display region.

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

wherein the at least one separating wall comprises a plurality of separating walls, and the separating walls surround the whole periphery of the display region.

6. A method of manufacturing an organic EL display device comprising:

forming a separating wall in an external region of a substrate on which a display region and the external region are formed, wherein the display region comprises a plurality of pixels comprising an organic EL layer and the external region surrounds the display region;

dripping a formation material of an organic layer including an organic material on a display region side of the separating wall, and

forming, on a wall surface of the display region side of the separating wall, an inclined surface that is inclined toward the display region side as the inclined surface is extended away from the substrate.

7. The method of manufacturing an organic EL display device according to claim 6, further comprising forming a first inorganic film composed of an inorganic material on the substrate before dripping the formation material of the organic layer.

8. The method of manufacturing an organic EL display device according to claim 6, further comprising forming a second inorganic film composed of an inorganic material that integrally covers the organic layer and the separating wall after dripping the formation material of the organic layer to form the organic layer.

9. The method of manufacturing an organic EL display device according to claim 6, further comprising:

forming a separating wall formation film with a photosensitive resin composition on the substrate;

disposing, on the separating wall formation film, a photomask including a light transmitting part that corresponds to apart where the separating wall is formed;

disposing a light source above the display region; and

forming the separating wall by an exposure to perform a development.