Organic EL display device and method for fabricating the same

• US 20060158077A1
• Filed: 12/23/2005
• Published: 07/20/2006
• Est. Priority Date: 12/24/2004
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Optrex Corporation (Kyocera Corporation)
• Inventors: Kato, Naoki, Masumo, Kunio, Yokoyama, Mika
• Granted Patent: US 7,414,363 B2
• Time in Patent Office: Days
• US Class Current: 313/112
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

An organic EL display device includes color filters 102, an overcoat layer 103 and an inorganic solid layer 104 disposed on a substrate 101; a first electrodes 105, an organic film 107 and a second electrodes 108 disposed on the inorganic solid layer 104; an insulating layer 106 disposed so as to cover edge portions of the first electrodes. The organic EL display device can improve production yield and restrain visual failure from being caused with the lapse of time by including a protection layer 109 so as to prevent the inorganic solid layer 104 from being damaged.

Claims

1. An organic EL display device comprising:

a substrate;

a color organic material layer disposed on the substrate;

an overcoat layer covering the color organic material layer;

an inorganic solid layer disposed on the overcoat layer;

a plurality of first electrodes, an organic light-emitting layer and a plurality of second electrodes disposed on the inorganic solid layer;

a light-emitting portion, the light-emitting portion comprising a region of the organic light-emitting layer, where a first electrode and a second electrode overlap each other, and which is brought into contact with the first electrode and the second electrode;

an insulting film disposed so as to cover both of edges of the first electrodes and all gaps between the first electrodes and adjacent ones thereof; and

a protection layer disposed so as to cover an inorganic solid layer on the substrate as much as possible except areas of the first electrodes, the protection layer being patterned so as not to be short-circuited with the first electrodes when the protection layer comprises a conductive material.

2. The organic EL display device according to claim 1, wherein the protection layer is disposed outside an active area.

3. The organic EL display device according to claim 1, wherein the protection layer is conductive and is disposed so as to be insulated from the first electrodes.

4. The organic EL display device according to claim 1, wherein the protection layer is disposed so as to cover a whole region where the overcoat layer is disposed.

5. The organic EL display device according to claim 1, wherein the protection layer and the first electrodes are layers to be processed by the same processes.

6. The organic EL display device according to claim 1, wherein the organic light-emitting layer emits white light, and the color organic material layer comprises color filters of R, G and B.

7. The organic EL display device according to claim 1, wherein the organic light-emitting layer and the color organic material layer have at least a kind of color-converting layer disposed therebetween, said color-converting layer being capable of converting original emitting light to a different color light.

8. A method for fabricating an organic EL display device, comprising:

disposing a color organic material layer on a substrate;

disposing an overcoat layer so as to cover the color organic material layer;

disposing an inorganic solid layer on top of the overcoat layer;

disposing a plurality of first electrodes on the inorganic solid layer;

disposing a protection layer on the inorganic solid layer and patterning the inorganic solid layer so as not to contact with the first electrodes;

cleaning the substrate from above the first electrodes and the protection layer;

disposing an insulating film on the first electrodes, the insulating film having openings;

disposing an organic light-emitting layer; and

disposing a plurality of second electrodes on the organic light-emitting layer disposed on the first electrodes.

9. The method according to claim 8, further comprising disposing the first electrodes and the protection layer by the same process.

10. The method according to claim 8, further comprising disposing separators to separate the second electrodes from one another.