Organic electroluminescence display device

• US 20080203909A1
• Filed: 02/14/2008
• Published: 08/28/2008
• Est. Priority Date: 02/28/2007
• Status: Abandoned Application

• Current Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Azuma, Hitoshi
• Application Number:
  US12/071,023
• Publication Number:
  US 20080203909A1
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/8428 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays

Abstract

There is provided an organic electroluminescence display device with sufficient sealability that reduces discharge of gas and moisture infiltration into sealed space. An organic EL display device structured to coat the surface of a spacer fixed to the inner surface of a sealing substrate and a bonded surface of the side wall to a sealing member with an inorganic insulation film.

Claims

1. An organic EL display device comprising:

a lower electrode disposed on a main surface of an element substrate;

an organic EL layer with a multi-layer structure disposed on the lower electrode;

an upper electrode disposed on the organic EL layer as an upper layer;

a sealing substrate disposed opposite the element substrate;

a plurality of spacers disposed between the sealing substrate and the element substrate; and

a sealing member for bonding a peripheral portion between the sealing substrate and the element substrate,

wherein the spacers are fixed to the sealing substrate, each surface of which is coated with an inorganic insulation film.

2. The organic EL display device according to claim 1, wherein the spacer is a resin shaped member.

3. The organic EL display device according to claim 1, wherein the spacer is fixed to the sealing substrate via a bond member which is different from a member for forming the spacer.

4. The organic EL display device according to claim 1, wherein the sealing substrate is provided with a side wall protruding toward the element substrate on the peripheral portion, and the inorganic insulation film is interposed between the side wall and the sealing member.

5. The organic EL display device according to claim 4, wherein the side wall is formed of the same material for forming the spacer, and is fixed to the sealing substrate via the sealing member.

6. The organic EL display device according to claim 1, wherein the sealing substrate includes the inorganic insulation film on an inner surface of an area enclosed by the side wall.

7. The organic EL display device according to claim 1, wherein the sealing substrate includes a desiccant at a portion opposite the upper electrode.

8. The organic EL display device according to claim 1, wherein the spacer protrudes from a surface of the desiccant toward the upper electrode.

9. The organic EL display device according to claim 1, wherein the organic EL layer includes an electron feed layer, a light emitting layer, a hole feed layer, and a hole implantation layer.

10. The organic EL display device according to claim 2, wherein the resin shaped member has a column-like form.

11. The organic EL display device according to claim 2, wherein the resin shaped member has a bead-like form.

12. An organic EL display device comprising:

a lower electrode disposed on a main surface of an element substrate;

an organic EL layer with a multi-layer structure disposed on the lower electrode;

an upper electrode disposed on the organic EL layer as an upper layer;

a sealing substrate disposed opposite the element substrate;

a plurality of spacers disposed between the sealing substrate and the element substrate; and

a sealing member for bonding a peripheral portion between the sealing substrate and the element substrate,

wherein the spacer is formed of a resist resin, and has a surface coated with an inorganic insulation film.

13. The organic EL display device according to claim 12, wherein the resist resin is formed of a photosensitive acrylic resin.

14. The organic EL display device according to claim 12, wherein a desiccant is coated on an area between the spacers.

15. The organic EL display device according to claim 12,

wherein the sealing substrate has a side wall protruding toward the element substrate on the peripheral portion;

the side wall is formed of the same material for forming the spacer; and

the inorganic insulation film is interposed between the side wall and the sealing member.