OLED Subregion Segmentation for Short Circuit Isolation
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Solution Overview
Problem
Large organic light-emitting diodes (OLEDs) are prone to internal short circuits due to minute particles during manufacturing, which can lead to failures and are difficult to detect, resulting in costly individual testing before delivery.
Innovation Solution
The OLEDs are structured into subregions with connecting elements that act as electrical fuses, allowing for electrical insulation of a short-circuited area, preventing the failure from propagating and maintaining the functionality of other OLED elements, with optional scattering layers to blur out the non-luminous point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the OLED is manufactured with larger luminous surfaces, then the lighting coverage is improved, but the risk of internal short circuits increases
Solution Approach 1:
The OLED is divided into multiple independently separable subregions (first subregion, second subregion, third subregion) through separating regions. This segmentation allows the OLED to maintain a large overall luminous surface area while reducing the risk that a short circuit in one subregion will affect the entire device. Each subregion can be electrically isolated, so failures are contained locally rather than propagating across the whole luminous surface.
2Measurement precision
If individual testing is performed for each OLED before delivery, then the detection of potential failures is improved, but the manufacturing cost increases
Solution Approach 1:
The separating regions and connecting elements are pre-integrated into the OLED structure during manufacturing, creating built-in failure isolation mechanisms and test access points. This preliminary structuring enables more efficient testing procedures where potential failures can be detected and isolated without requiring expensive individual comprehensive testing of each large-area OLED, thereby reducing manufacturing costs while maintaining detection accuracy.
Data Source
AI summary
In various embodiments, an organic light-emitting organic is provided. The organic light-emitting component may include a first electrode layer, an organic functional layer structure over the first electrode layer, and a second electrode layer over the organic functional layer structure. The second electrode layer and the organic functional layer structure are divided into subregions which are arranged laterally next to one another, which are respectively at least partially separated from one another. A plurality of the subregions are electrically connected to at least two neighboring subregions by at least two corresponding connecting elements with are formed by the second electrode layer and the organic functional layer structure.