Organic EL display

• US 6,909,229 B2
• Filed: 01/04/2002
• Issued: 06/21/2005
• Est. Priority Date: 01/11/2001
• Status: Expired due to Fees

• Current Assignee: Tohoku Pioneer Company Limited (Pioneer Corporation)
• Original Assignee: Tohoku Pioneer Company Limited (Pioneer Corporation)
• Inventors: Yazawa, Naoki
• Primary Examiner(s): Patel, Ashok
• Application Number:
  US10/035,165
• Publication Number:
  US 20020089281A1
• Time in Patent Office: 1,264 Days
• Field of Search: 313/504, 313506-509, 313/498, 349/11, 345/76, 315/169.3, 347/113, 347/106, 347/143, 347/182, 347/183
• US Class Current: 313/504
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00

Abstract

An organic EL display includes a transparent electrode 2, an organic EL layer 3, 4, and a back electrode 5 sequentially stacked on a transparent substrate 1. A half mirror 6 is disposed on the outer surface of the transparent substrate 1. A thin metal film is formed as the half mirror 6 by vapor-depositing or sputtering one of metals such as Al, Ag, Sn and Cr and a compound such as TiO₂ or several of the metals and compound on the outer surface of the transparent substrate 1. A transparent resin film on which a thin metal film is formed, or the like is used.

Claims

1. An organic electroluminescent display comprising:

a transparent substrate having an inner surface and an outer surface;

a transparent electrode disposed on the inner surface of the transparent substrate;

an organic EL layer disposed on the transparent electrode;

a back electrode disposed on the organic EL layer; and

a half mirror disposed on the outer surface of the transparent substrate and at a distance from the organic EL layer to display an image that produces a sense of depth,

wherein the transparent electrode is in direct contact with the organic EL layer.

2. The organic electroluminescent display according to claim 1, wherein the half mirror is formed of a thin metal film on the outer surface of the transparent substrate or a surface of a transparent plate that protects the organic electroluminescent display.

3. The organic electroluminescent display according to claim 1, wherein the half mirror is formed of a transparent resin film having a thin metal film, the transparent resin film attached to the transparent substrate or a transparent plate that protects the organic electroluminescent display.

4. The organic electroluminescent display according to claim 1, wherein a perpendicular distance from a surface of the organic EL layer to the half mirror is equal to or larger than a dot pitch of the display.

5. The organic electroluminescent display according to claim 2, wherein a perpendicular distance from a surface of the organic EL layer to the half mirror is equal to or larger than a dot pitch of the display.

6. The organic electroluminescent display according to claim 3, wherein a perpendicular distance from a surface of the organic EL layer to the half mirror is equal to or larger than a dot pitch of the display.