Organic el emission device

• US 20070159085A1
• Filed: 11/08/2005
• Published: 07/12/2007
• Est. Priority Date: 10/31/2005
• Status: Active Grant

• Current Assignee: Idemitsu Kosan Company Limited
• Original Assignee: Idemitsu Kosan Company Limited
• Inventors: Kuma, Hitoshi, Hosokawa, Chishio
• Granted Patent: US 7,843,134 B2
• Time in Patent Office: Days
• US Class Current: 313/506
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1011 Condensed systems
• CPC Class Codes: C09K 2211/1014 bridged by heteroatoms, e.g. N, P, Si or B
• CPC Class Codes: C09K 2211/1088 containing oxygen as the only heteroatom
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/86 Series electrical configurations of multiple OLEDs

Abstract

An organic electroluminescent apparatus 1 comprising: a first emitting device 10 wherein a first organic emitting layer 14 is interposed between a first under electrode 12 and a first upper electrode 16; and a second emitting device 20 wherein a second organic emitting layer 24 is interposed between a second under electrode 22 and a second upper electrode 26. The second under electrode 22 is electrically connected to the first upper electrode 16 or is made of the same material as that of the first upper electrode 16. The two devices 10 and 20 are placed on a plane, and the devices 10 and 20 exhibit different emission colors.

Claims

1. An organic electroluminescent apparatus comprising:

a first emitting device wherein a first organic emitting layer is interposed between a first under electrode and a first upper electrode; and

a second emitting device wherein a second organic emitting layer is interposed between a second under electrode and a second upper electrode, the second under electrode being electrically connected to the first upper electrode or being made of the same material as the material of the first upper electrode;

the first and second emitting devices being placed on a plane; and

the first and second emitting devices exhibiting different emission colors.

4. The organic electroluminescent apparatus according to claim 1, wherein at least one of the emitting devices has two reflection surfaces,

at least one of the reflection surfaces is semi-reflective and semi-transparent,

the organic emitting layer is positioned between the two optical reflection interfaces, and

the distance between the two optical reflection interfaces is determined so as to narrow the natural emission width of light emitted from the emission center in the organic emitting layer.

7. The organic electroluminescent apparatus according to claim 1,

wherein emission surfaces of the emitting devices have a rectangular shape at a length ratio of a long side to a short side of 3.5 or more,

two adjacent emitting devices are electrically connected to each other in the longitudinal direction of the rectangle, and

the emitting devices are arranged in a diagonal pattern.

10. The organic electroluminescent apparatus according to claim 4,

wherein emission surfaces of the emitting devices have a rectangular shape at a length ratio of a long side to a short side of 3.5 or more,

two adjacent emitting devices are electrically connected to each other in the longitudinal direction of the rectangle, and

the emitting devices are arranged in a diagonal pattern.

13. The organic electroluminescent apparatus according to claim 1, further comprising a light diffusive member on the light emission side.

16. The organic electroluminescent apparatus according to claim 4, further comprising a light diffusive member on the light emission side.

2. An organic electroluminescent apparatus comprising:

a first emitting device wherein a first organic emitting layer is interposed between a first under electrode and a first upper electrode;

a second emitting device wherein a second organic emitting layer is interposed between a second under electrode and a second upper electrode, the second under electrode being electrically connected to the first upper electrode or being made of the same material as the material of the first upper electrode; and

a third emitting device wherein a third organic emitting layer is interposed between a third under electrode and a third upper electrode, the third under electrode being electrically connected to the second upper electrode or being made of the same material as the material of the second upper electrode;

the first, second and third emitting devices being placed on a plane; and

the first, second and third emitting devices exhibiting two or more different emission colors.

5. The organic electroluminescent apparatus according to claim 2, wherein at least one of the emitting devices has two reflection surfaces,

at least one of the reflection surfaces is semi-reflective and semi-transparent,

the organic emitting layer is positioned between the two optical reflection interfaces, and

the distance between the two optical reflection interfaces is determined so as to narrow the natural emission width of light emitted from the emission center in the organic emitting layer.

8. The organic electroluminescent apparatus according to claim 2,

wherein emission surfaces of the emitting devices have a rectangular shape at a length ratio of a long side to a short side of 3.5 or more,

two adjacent emitting devices are electrically connected to each other in the longitudinal direction of the rectangle, and

the emitting devices are arranged in a diagonal pattern.

11. The organic electroluminescent apparatus according to claim 5,

wherein emission surfaces of the emitting devices have a rectangular shape at a length ratio of a long side to a short side of 3.5 or more,

two adjacent emitting devices are electrically connected to each other in the longitudinal direction of the rectangle, and

the emitting devices are arranged in a diagonal pattern.

14. The organic electroluminescent apparatus according to claim 2, further comprising a light diffusive member on the light emission side.

17. The organic electroluminescent apparatus according to claim 5, further comprising a light diffusive member on the light emission side.

3. An organic electroluminescent apparatus, comprising emitting devices the number of which is N, N being an integer of two or more,

wherein the first emitting device comprises the first organic emitting layer interposed between the first under electrode and the first upper electrode,

the (k+1)^th emitting device, k being an integer of 1 or more and N−

1 or less, comprises the (k+1)^th organic emitting layer interposed between the (k+1)^th under electrode and the (k+1)^th upper electrode, the (k+1)^th under electrode being electrically connected to the k^th upper electrode or being made of the same material as the material of the k^th upper electrode, and

the N^th emitting device comprises the N^th organic emitting layer interposed between the N^th under electrode and the N^th upper electrode, the N^th under electrode being electrically connected to the (N−

1)^th upper electrode or being made of the same material as the material of the (N−

1)^th upper electrode,

the N emitting devices are placed on a plane, and the N emitting devices exhibit two or more different emission colors.

6. The organic electroluminescent apparatus according to claim 3, wherein at least one of the emitting devices has two reflection surfaces,

at least one of the reflection surfaces is semi-reflective and semi-transparent,

the organic emitting layer is positioned between the two optical reflection interfaces, and

the distance between the two optical reflection interfaces is determined so as to narrow the natural emission width of light emitted from the emission center in the organic emitting layer.

9. The organic electroluminescent apparatus according to claim 3,

wherein emission surfaces of the emitting devices have a rectangular shape at a length ratio of a long side to a short side of 3.5 or more,

two adjacent emitting devices are electrically connected to each other in the longitudinal direction of the rectangle, and

the emitting devices are arranged in a diagonal pattern.

12. The organic electroluminescent apparatus according to claim 6,

wherein emission surfaces of the emitting devices have a rectangular shape at a length ratio of a long side to a short side of 3.5 or more,

two adjacent emitting devices are electrically connected to each other in the longitudinal direction of the rectangle, and

the emitting devices are arranged in a diagonal pattern.

15. The organic electroluminescent apparatus according to claim 3, further comprising a light diffusive member on the light emission side.

18. The organic electroluminescent apparatus according to claim 6, further comprising a light diffusive member on the light emission side.