Patent ID: 7843134
Filing Date: 2010-11-30
Classification: C09K,H01L,H05B

Abstract:
1. An organic electroluminescent apparatus comprising: a first emitting device wherein a first organic emitting layer is between a first under electrode and a first upper electrode, the first emitting device comprising insulating layers having different heights on both sides of the first under electrode to insulate the first under electrode from the first upper electrode; and a second emitting device wherein a second organic emitting layer is between a second under electrode and a second upper electrode, the second emitting device comprising insulating layers having different heights on both sides of the second under electrode to insulate the second under electrode from the second upper electrode, and the second upper electrode being electrically connected to the first under electrode or being made of the same material as the material of the first under electrode; at least one of the emitting devices comprising a light diffusive member through which light is emitted from the apparatus, the light diffusive member being able to relieve radiation into an isotropic radiation pattern without the loss of optical intensity; the first and second emitting devices being substantially coplanar; and the first and second emitting devices exhibiting different emission colors; 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 between the two optical reflection interfaces, and the distance between the two optical reflection interfaces is set to narrow the natural emission bandwidth of light emitted from the emission center in the organic emitting layer.