OLED Light-Emitting Assembly Narrow Border Electrical Connection
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Solution Overview
Problem
Organic light-emitting diode (OLED) assemblies are prone to degradation due to moisture and oxygen invasion, which reduces their service life, and existing packaging methods fail to effectively address this issue, limiting the durability and efficiency of OLEDs.
Innovation Solution
A light-emitting assembly design that includes a first substrate with a transparent electrode layer, a light-emitting layer, and a second electrode layer, where the second electrode layer is located between the second substrate and the light-emitting layer, and conductive members are used to establish electrical connections while a moisture barrier layer and a composite sealing structure prevent external moisture and oxygen from reaching the light-emitting layer, enhancing the assembly's durability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional packaging methods are used for OLED assemblies, then the manufacturing process is simple, but the service life is reduced due to moisture and oxygen invasion
Solution Approach 1:
The packaging structure is divided into multiple functional layers including a first substrate, a second substrate, a moisture barrier layer, and sealing structures. Each layer performs a specific function (structural support, moisture blocking, sealing), allowing the complex protection requirement to be achieved through modular, manageable components rather than a single complex package
Solution Approach 2:
A moisture barrier layer is introduced as an intermediary component between the OLED assembly and the external environment. This layer specifically blocks moisture and oxygen from reaching the light-emitting layer, while the conductive members serve as intermediaries to establish electrical connections without compromising the moisture barrier
2Shape
If the second electrode layer is positioned between the second substrate and the light-emitting layer, then a narrow border structure is achieved, but electrical connection becomes more difficult
Solution Approach 1:
The conductive members extend in the thickness direction (vertical dimension) to connect the second electrode layer on the first substrate with the second substrate. This dimensional approach allows electrical connection without requiring the electrode layers to extend to the edges in the planar dimension, thus maintaining the narrow border structure while enabling reliable electrical connectivity
Solution Approach 2:
Conductive members serve as intermediary elements that bridge the electrical connection between the second electrode layer and the second substrate. These members are specifically positioned to contact the second electrode layer and extend to the second substrate, providing a dedicated electrical pathway that does not interfere with the narrow border design
Data Source
AI summary
A light-emitting assembly includes a first substrate, a first electrode layer, a light-emitting layer, a second electrode layer, a second substrate, a first conductive member and a second conductive member. The first electrode layer, the light-emitting layer and the second electrode layer are sequentially disposed on the first substrate. An area of the second electrode layer is entirely located within an area of the light emitting layer. The second electrode layer is located between the second substrate and the light-emitting layer. The first and second conductive members are disposed between the first and second substrates. The first electrode layer is electrically connected to a first circuit on the second substrate through the first conductive member. The second electrode layer is electrically connected to a second circuit on the second substrate through the second conductive member. The second conductive member is located within the area of the second electrode layer.