OLED Component Adaptation Structure Homogeneous Optical Properties
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Solution Overview
Problem
Conventional OLEDs exhibit lateral variations in optical properties such as transmissivity, absorption, and reflectivity due to the use of metallic contacts and glass covers, leading to uneven heating and potential thermal strains, which affect the representation of information and the overall performance of optoelectronic components.
Innovation Solution
A component and method are developed to create a more homogeneous optical variable across the substrate, eliminating metallic contacts and using an adaptation structure to match the optical properties of the optically active and inactive regions, ensuring uniform heating and improved information representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metallic contacts and glass covers are used in conventional OLEDs, then electrical contacting and encapsulation are achieved, but lateral variations in optical properties (transmissivity, absorption, reflectivity) occur
Solution Approach 1:
The patent removes metallic contacts from the optically active region entirely, extracting the source of optical inhomogeneity. Instead, transparent conductive oxide contacts are used only in the optically inactive region, eliminating the contradiction between reliable electrical contacting and homogeneous optical properties in the active display area.
Solution Approach 2:
The patent applies different contact structures to different regions: transparent conductive oxide contacts are placed only in the optically inactive region, while the optically active region maintains its transparency. This local differentiation resolves the contradiction by allowing metallic-like conductivity where needed while preserving optical homogeneity where required.
2Reliability
If metallic contacts are used for current distribution, then uniform current supply to anode and cathode is achieved, but optical inhomogeneity and uneven heating occur
Solution Approach 1:
The patent introduces transparent conductive oxide as an intermediary material that provides electrical conductivity without the optical and thermal drawbacks of metallic contacts. This mediator achieves uniform current distribution while avoiding the absorption and uneven heating caused by metallic contacts in the optically active region.
3Ease of operation
If different transmissivity regions are present (metallization vs. light emitting region), then electrical functionality is achieved, but information representation is altered undesirably
Solution Approach 1:
The patent segments the device into optically active and optically inactive regions with distinct contact structures. Metallic-like contacts are confined to the inactive region, while the active region maintains uniform optical properties for accurate information representation. This segmentation resolves the contradiction by isolating electrical functionality from optical display areas.
Data Source
AI summary
Various embodiments may relate to a component. The component includes an optically active region designed for electrically controllably transmitting, reflecting, absorbing, emitting and/or converting an electromagnetic radiation, and an optically inactive region formed alongside the optically active region, wherein the optically inactive region and/or the optically active region have/has an adaptation structure designed to adapt the value of an optical variable in the optically inactive region to a value of the optical variable in the optically active region.