IP Library Granted Patent US 8,653,548
Granted Patent B2
US 8,653,548 · App. 12/808,156 · Granted Feb 18, 2014

Light-emitting device

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Quick Facts
Patent No.
US 8,653,548
App. No.
12/808,156
Granted
Feb 18, 2014
Kind
B2
Abstract

A light-emitting device comprising a light-emitting layer and a light exit layer. In this case, the light exit layer has a multiplicity of mutually parallel first areas, arranged in an inclined fashion with respect to the light-emitting layer. The light exit layer furthermore has a multiplicity of mutually parallel second areas arranged in an inclined fashion with respect to the light-emitting layer and in an inclined fashion with respect to the first areas. The first areas are transparent and the second areas are reflective to light emitted by the light-emitting layer.

Claims (33)

1. A light-emitting device, comprising:

a plurality of light-emitting elements; and

a carrier comprising:

a plurality of mutually parallel first areas; and

a plurality of mutually parallel second areas arranged in an inclined fashion with respect to the first areas,

wherein the light-emitting elements are arranged on the first areas, each light-emitting element comprises a substrate and an OLED layer construction having a light-emitting layer comprising an optically active, radiation-generating organic material, and

wherein the light-emitting elements are in direct contact with the first areas of the carrier.

2. The light-emitting device as claimed in claim 1 , wherein the carrier comprises prisms arranged in a parallel fashion, the prisms having areas forming the first areas and the second areas of the carrier.

3. A light-emitting device, comprising:

a substrate; and

an OLED layer construction applied to a surface of the substrate and having at least one light-emitting layer comprising an optically active, radiation-generating organic material,

wherein the surface of the substrate is height-structured periodically in a lateral direction,

the OLED layer construction is in direct contact with the height-structured surface of the substrate, covering and conforming to the height-structured surface of the substrate, and

the surface of the OLED layer construction facing way from the substrate is height-structured in the same way as the height-structured surface of the substrate.

4. The light-emitting device as claimed in claim 3 , wherein the height structuring rises and falls linearly in one lateral direction and the surface of the substrate has substantially plane areas.

5. A light-emitting device, comprising

a substrate having a first side and a second side opposite the first side;

an OLED layer construction having a light-emitting layer comprising an optically active, radiation-generating organic material;

wherein the light-emitting layer has strip-type first regions and second regions arranged alternately in a lateral direction,

wherein the first regions and the second regions have different refractive indices and comprise the same material as the light-emitting layer, and

wherein the first regions and the second regions are formed inside the light-emitting layer.

6. The light-emitting device as claimed in claim 5 , wherein dimensions of the first regions and of the second regions in the lateral direction are of the order of magnitude of a wavelength of the light emitted by the light-emitting layer.

7. The light-emitting device as claimed in claim 6 , wherein the dimensions of the first regions and of the second regions in the lateral direction is smaller than 5-times the wavelength.

8. A method for producing the light-emitting device of claim 5 , the method comprising;

forming the first regions and the second regions having different refractive indices inside of the light-emitting layer by irradiating first regions of the light-emitting layer with UV light through a mask and not irradiating the second regions, wherein irradiation of the first regions alters the light-emitting layer of the irradiated first regions at a molecular level, to change the refractive index in the first regions with respect to the refractive index of the second regions.

9. A light-emitting device, comprising:

a substrate having first side and a second side opposite the first side;

an OLED layer construction having a light-emitting layer comprising an optically active, radiation-generating organic material in direct contact with the first side of the substrate;

a light exit layer in direct contact with a side of the OLED layer construction facing away from the substrate, the light exit layer being a planar layer lying parallel to the substrate and the OLED layer construction; and

a multiplicity of anisotropic scattering particles arranged in or on the light exit layer, the anisotropic scattering particles being oriented along a lateral direction of the light-emitting device.

10. A method for producing the light-emitting device according to claim 9 , comprising:

introducing scattering particles having a permanent or inducible electric or magnetic dipole or quadrupole moment that is different than zero into the light exit layer; and

applying an electric or magnetic field to the scattering particles to orient the scattering particles.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 11, 2020
From: OSRAM OLED GMBH
To: DOLYA HOLDCO 5 LIMITED
Reel/Frame 053464/0374 →
CORRECTIVE ASSIGNMENT TO CORRECT THE 11/658.772 REPLACED 11/658.772 PROPERTY NUMBERS PREVIOUSLY RECORDED AT REEL: 053464 FRAME: 0395. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Aug 11, 2020
From: DOLYA HOLDCO 5 LIMITED
To: PICTIVA DISPLAYS INTERNATIONAL LIMITED
Reel/Frame 053464/0395 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 21, 2016
From: OSRAM OPTO SEMICONDUCTORS GMBH
To: OSRAM OLED GMBH
Reel/Frame 037567/0993 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 7, 2010
From: KRUMMACHER, BENJAMIN CLAUS; SCHINDLER, FLORIAN; KLEIN, MARKUS
To: OSRAM OPTO SEMICONDUCTORS GMBH
Reel/Frame 024948/0824 →