Organic EL display and electronic apparatus

• US 9,343,698 B2
• Filed: 03/18/2014
• Issued: 05/17/2016
• Est. Priority Date: 03/29/2013
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: JOLED Inc.
• Inventors: Negishi, Eisuke
• Primary Examiner(s): Mandala, Michelle
• Assistant Examiner(s): DRYE, TYLER B
• Application Number:
  US14/218,466
• Publication Number:
  US 20140291641A1
• Time in Patent Office: 791 Days
• Field of Search: 257/40, 257/79, 257 82- 84, 257/88, 257/89, 257 93-100, 257/E51.001, 257/E33.001, 257/E33.013, 257/E33.044, 313504-506, 438/149
• US Class Current: 1/1
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: H10K 10/464 Lateral top-gate IGFETs comprising only a single gate
• CPC Class Codes: H10K 10/466 Lateral bottom-gate IGFETs comprising only a single gate
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 85/113 Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene

Abstract

An organic EL display includes: a first insulating layer on a lower side as well as a second insulating layer on an upper side, the first insulating layer and the second insulating layer being provided to a display region and a peripheral region; a first separation groove provided in the first insulating layer between the display region and the peripheral region; a first conductive layer provided on the first insulating layer in the peripheral region, with a side face and a bottom of the first separation groove in between; a covering section in which at least a part of an end face of the second insulating layer is covered by the organic layer or the second electrode; and a sealing section provided on an outer edge side of the covering section, and formed by laminating the first conductive layer and the second electrode.

Claims

1. An organic EL display comprising:

a display region including a plurality of pixels being arranged and each including a light-emission device, the light-emission device including a first electrode, an organic layer, and a second electrode laminated in order from a substrate side, and the organic layer including a light emitting layer;

a peripheral region provided on an outer edge side of the display region, and including a peripheral circuit, the organic layer extending from the display region into the peripheral region;

a first insulating layer as well as a second insulating layer, the first insulating layer being closer to the substrate side than the second insulating film, the first insulating layer and the second insulating layer being provided to extend from the display region to the peripheral region;

a first separation groove provided in the first insulating layer between the display region and the peripheral region;

a first conductive layer provided on the first insulating layer in the peripheral region, and formed in a region between the display region and the peripheral region, and formed between a side face and a bottom of the first separation groove;

a covering section in which at least a part of an end face of the second insulating layer is covered by the organic layer or the second electrode in the peripheral region; and

a sealing section provided on an outer edge side of the covering section, and formed by laminating the first conductive layer and the second electrode.

2. The organic EL display according to claim 1, wherein a connection section is formed between the substrate and the first insulating layer, and in the connection section, a second conductive layer and a third insulating layer are provided in order from the substrate side, the first insulating layer being formed on the third insulating layer, the first separation groove extends through and separates the first insulating layer and the third insulating layer, and the first conductive layer and the second conductive layer are laminated at the bottom of the first separation groove.

3. The organic EL display according to claim 2, wherein the second electrode and the second conductive layer are electrically connected through the first conductive layer.

4. The organic EL display according to claim 1, wherein the first electrode and the first conductive layer are formed by a same process.

5. The organic EL display according to claim 1, further comprising a second separation groove provided in the peripheral region, the second separation groove separating the first insulating layer into a part on an inner region side and a part on an outer region side.

6. The organic EL display according to claim 5, wherein a wall surface and a bottom surface of the second separation groove are covered by the first conductive layer, and the second separation groove is embedded by the second electrode.

7. The organic EL display according to claim 1, further comprising a high-resistive layer between the organic layer and the second electrode.

8. The organic EL display according to claim 2, wherein the first insulating layer and the second insulating layer are each an organic insulating layer, and the third insulating layer is an inorganic insulating layer.

9. The organic EL display according to claim 1, wherein a seal material is disposed at an end of the substrate.

10. The organic EL display according to claim 2, wherein the peripheral circuit is formed below the third insulating layer, on the substrate.

11. The organic EL display according to claim 1, wherein the light-emission device includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer which are provided on the substrate in order from the first electrode side.

12. The organic EL display according to claim 1, wherein the light-emission device includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, a charge generation layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer which are provided on the substrate in order from the first electrode side.

13. The organic EL display according to claim 1, wherein the plurality of pixels include a red pixel, a green pixel, and a blue pixel, or include a red pixel, a green pixel, a blue pixel, and a white pixel.

14. An electronic apparatus including an organic EL display,

the organic EL display comprising:

a display region including a plurality of pixels being arranged and each including a light-emission device, the light-emission device including a first electrode, an organic layer, and a second electrode laminated in order from a substrate side, and the organic layer including a light emitting layer;

a peripheral region provided on an outer edge side of the display region, and including a peripheral circuit, the organic layer extending from the display region into the peripheral region;

a first insulating layer as well as a second insulating layer, the first insulating layer being closer to the substrate side than the second insulating film, the first insulating layer and the second insulating layer being provided to extend from the display region to the peripheral region;

a first separation groove provided in the first insulating layer between the display region and the peripheral region;

a first conductive layer provided on the first insulating layer in the peripheral region, and formed in a region between the display region and the peripheral region, and formed between a side face and a bottom of the first separation groove;

a covering section in which at least a part of an end face of the second insulating layer is covered by the organic layer or the second electrode in the peripheral region; and

a sealing section provided on an outer edge side of the covering section, and formed by laminating the first conductive layer and the second electrode.