Organic light-emitting diode

Patent metadata

Field	Value
Publication number	US-10121833-B2
Application number	US-201615551216-A
Country	US
Kind code	B2
Filing date	Feb 17, 2016
Priority date	Feb 20, 2015
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

An organic light-emitting diode includes at least two segments arranged adjacent to one another, a scattering layer that at least partially scatters the light generated in each of the segments, and at least one separating region located in the scattering layer, wherein the separating region has a transmittance for light generated in the segments of at most 20%, the separating region, when viewed in a plan view, is arranged in a transitional region between adjacent segments such that within the scattering layer propagation of light between the segments is suppressed, the segments include organic layer sequences each located between a first electrode and a second electrode, the segments are distant from one another in a direction parallel to the main directions of extension, and the scattering layer directly adjoins the first electrode which is light-transmitting and directly adjoins a transparent layer on a side remote from the first electrode.

First claim

The invention claimed is:

1. An organic light-emitting diode comprising:
at least two segments electrically mutually independently operable, configured to generate light and arranged adjacent to one another when viewed in a plan view,
a scattering layer that at least partially scatters the light generated in each of the segments, and
at least one separating region located in the scattering layer,
wherein
in a direction parallel to main directions of an extension of the scattering layer, the separating region has a transmittance for light generated in the segments of at most 20%,
the separating region, when viewed in a plan view, is arranged in a transitional region between adjacent segments such that within the scattering layer propagation of light between the segments is suppressed,
the segments comprise organic layer sequences each located between a first electrode and a second electrode,
the segments are distant from one another in a direction parallel to the main directions of extension, and
the scattering layer directly adjoins the first electrode which is light-transmitting and directly adjoins a transparent layer on a side remote from the first electrode.

2. The organic light-emitting diode according to claim 1 , wherein
an average distance between the adjacent segments is at most 0.3 mm,
an average extent of the segments in a direction parallel to the main directions of extension is at least 100 times an average distance, and
the scattering layer, in a throughput direction perpendicular to the main directions of extension, has an opacity value of 0.5 to 0.99.

3. The organic light-emitting diode according to claim 1 , wherein the separating region has an average width in a direction parallel to at least one of the main directions of extension of at most 100 μm, and the scattering layer, together with the separating region, extends with a constant thickness over all the segments.

4. The organic light-emitting diode according to claim 1 , wherein
the separating region passes right through the scattering layer in a direction perpendicular to the main directions of extension, and
a thickness of the scattering layer is 1 μm to 50 μm.

5. The organic light-emitting diode according to claim 1 , wherein
the scattering layer comprises a multiplicity of inorganic scattering particles to scatter the light, and
the separating region is free of the scattering particles.

6. The organic light-emitting diode according to claim 1 , wherein
the scattering layer comprises an organic matrix material, and
the matrix material is at least partly decomposed in the separating region and, on at least one side facing the scattering layer, the separating region absorbs light.

7. The organic light-emitting diode according to claim 1 , wherein
the separating region comprises a metal or a metal alloy, and, on at least one side facing the scattering layer, the separating region reflects light.

8. The organic light-emitting diode according to claim 1 , wherein
the separating region is electrically conductive or comprises an electrically conductive sub-region, and
the separating region carries electrical current when the light-emitting diode is in use.

9. The organic light-emitting diode according to claim 1 , wherein
the separating region is in electrical contact with at least one of the electrodes of the organic light-emitting diode, and
the electrodes are configured to inject current into the segments and the second electrode is reflective.

10. The organic light-emitting diode according to claim 1 , wherein a region between the segments, in a direction parallel to the main directions of extension, is transmissive for the light generated in the segments.

11. The organic light-emitting diode according to claim 1 , wherein the separating region and the segments overlap one another, when viewed in plan view.

12. The organic light-emitting diode according to claim 1 , wherein
the segments each generate light of the same color, and
the light generated in the segments is emitted in unmodified spectral composition by the organic light-emitting diode.

13. A part of a rear light of a motor vehicle comprising the organic light-emitting diode according to claim 1 .

Assignees

• Osram Oled Gmbh

Inventors

• Riedel Daniel
• Rausch Andreas
• Niedermeier Ulrich

Classifications

• F21W2103/35

  Brake lights · CPC title

• F21W2103/00

  Exterior vehicle lighting devices for signalling purposes · CPC title

• H01L51/5203

  Electricity · mapped topic

• H01L51/5284

  Electricity · mapped topic

• F21S43/145 Primary

  Surface emitters, e.g. organic light emitting diodes [OLED] · CPC title