Organic EL light emitting element with light emitting layers and intermediate conductive layer

• US 6,107,734 A
• Filed: 09/28/1998
• Issued: 08/22/2000
• Est. Priority Date: 05/20/1998
• Status: Expired due to Term

• Current Assignee: Idemitsu Kosan Company Limited
• Original Assignee: Idemitsu Kosan Company Limited
• Inventors: Hosakawa, Chishio, Tanaka, Shosaku
• Primary Examiner(s): Patel, Vip
• Application Number:
  US09/161,503
• Time in Patent Office: 694 Days
• Field of Search: 313/506, 313/498, 313/505, 313/502
• US Class Current: 313/506
• CPC Class Codes: H10K 50/19 Tandem OLEDs
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 59/805 Electrodes
• CPC Class Codes: H10K 59/86 Series electrical configurations of multiple OLEDs

Abstract

An organic EL light emitting element and a light emitting device capable of realizing inexpensively a display which a scanning line current is suppressed and which is large size and high-resolution is provided. The organic EL light emitting element 6 is constituted from a transparent electrode 2; an opposed electrode 3 arranged in a manner to oppose to this transparent electrode 2; an intermediate conductive layer 4 of "n" sheets (1≦n≦100); and an organic layers 5 comprising at least an organic light emitting layer, the organic light emitting layer being arranged between the transparent electrode 2 and the opposed electrode 3 in a manner to sandwich the intermediate conductive layer 4 in an intermediate position. These organic EL light emitting element 6 are arranged in one dimension or in two dimensions, whereby the light emitting device 10 is constituted.

Claims

1. An organic EL light emitting element comprising:

a transparent electrode;

an opposed electrode arranged in a manner to oppose to the transparent electrode;

an intermediate conductive layer; and

a plurality of organic light emitting layers arranged between said transparent electrode and said opposed electrode in a manner to sandwich said intermediate conductive layer in an intermediate position.

2. The organic EL light emitting element according to claim 1, wherein a number "n" of said intermediate conductive layer is 1≦

n≦

100.

3. The organic EL light emitting element according to claim 2, wherein said transparent electrode, said intermediate conductive layer and said opposed electrode are laminated in a manner to overlap each other in viewing on a plane.

4. The organic EL light emitting element according to claim 2, wherein

a first unit light emitting element arranging an organic light emitting layer between said transparent electrode and a first intermediate conductive layer;

and

an "n" th unit light emitting element arranging the organic light emitting layer between an "n" th intermediate conductive layer and said opposed electrode are arranged side by side on one plane.

5. The organic EL light emitting element according to claim 2, wherein a first unit light emitting element arranging an organic light emitting layer between said transparent electrode and a first intermediate conductive layer;

and

an "n" th unit light emitting element arranging the organic light emitting layer between an "n" th intermediate conductive layer and said opposed electrode possess at least a rectifying ability.

6. A light emitting device, wherein the organic light emitting elements comprising:

a transparent electrode;

an opposed electrode arranged in a manner to oppose to the transparent electrode;

an intermediate conductive layer; and

a plurality of organic light emitting layers arranged between said transparent electrode and said opposed electrode in a manner to sandwich said intermediate conductive layer in an intermediate position;

are arranged as pixels in one dimension or in two dimensions.

7. The light emitting device according to claim 6, wherein the number "n" of said intermediate conductive layer is 1≦

n≦

100.

8. The light emitting device according to claim 7, wherein said transparent electrode, said intermediate conductive layer and said opposed electrode are laminated in a manner to overlap each other in viewing on a plane.

9. The light emitting device according to claim 7, wherein a first unit light emitting element arranging an organic light emitting layer between said transparent electrode and a first intermediate conductive layer;

and an "n" th unit light emitting element arranging the organic light emitting layer between an "n" th intermediate conductive layer and said opposed electrode are arranged side by side on one plane.

10. The light emitting device according to claim 7, wherein a first unit light emitting element arranging an organic light emitting layer between said transparent electrode and a first intermediate conductive layer;

and an "n" th unit light emitting element arranging the organic light emitting layer between an "n" th intermediate conductive layer and said opposed electrode possess at least a rectifying ability.