Display Panel Partition Wall Structure for Reliable Electrode Connectivity
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Solution Overview
Problem
Existing display panels face challenges in achieving improved display quality and efficiency, particularly in the design and materials used for the conductive partition walls and light-emitting elements, which affect the overall performance and durability of the display.
Innovation Solution
The display panel incorporates a conductive partition wall structure with a first partition wall layer made of an aluminum alloy, including impurities such as nickel, lanthanum, or neodymium, and a second partition wall layer of a different conductive material, along with a pixel electrode, intermediate layer, and counter electrode configuration, enhancing the electrical connectivity and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single-layer conductive partition wall is used, then the manufacturing process is simple, but the electrical connectivity and display quality are insufficient
Solution Approach 1:
The conductive partition wall is divided into multiple layers (first conductive partition wall layer and second conductive partition wall layer) with different materials and functions. The first layer provides basic conductivity while the second layer enhances electrical connectivity and compensates for work function differences, resolving the contradiction between simple structure and reliable electrical connectivity.
Solution Approach 2:
The patent uses composite material structure where the first conductive partition wall layer is made of one conductive material and the second layer is made of a different conductive material. This composite approach allows optimization of electrical properties at different interfaces, improving overall electrical connectivity without excessive structural complexity.
2Manufacturing precision
If the partition wall structure is simplified, then the manufacturing is easier, but the display quality and durability are reduced
Solution Approach 1:
By segmenting the partition wall into multiple formable layers, each layer can be deposited and patterned using standard manufacturing processes. This segmentation allows precise control over each layer's thickness and composition, achieving high manufacturing precision while maintaining compatibility with existing manufacturing capabilities.
Solution Approach 2:
The patent optimizes parameters such as the thickness of each partition wall layer and the composition ratios of conductive materials to achieve the desired electrical properties. By carefully controlling these parameters, the manufacturing precision is improved without requiring fundamentally new manufacturing processes.
3Reliability
If a single-material partition wall is used, then the manufacturing is simpler, but the work function matching and electrical performance are inadequate
Solution Approach 1:
The conductive partition wall uses composite materials with different work functions arranged in specific layers. This allows the first layer to provide one set of electrical properties while the second layer provides complementary properties, achieving better overall work function matching with the adjacent electrodes without requiring a single complex material.
Solution Approach 2:
Different materials are placed at different locations within the partition wall structure based on their specific electrical properties. The first conductive partition wall layer uses one material optimized for interfacing with certain electrodes, while the second layer uses another material optimized for interfacing with other electrodes, achieving local optimization of work function matching.
Data Source
AI summary
A display panel includes a substrate, a pixel circuit layer disposed on the substrate and including a transistor, a common electrode disposed on the pixel circuit layer, a conductive partition wall including a first partition wall layer disposed on the common electrode and a second partition wall layer disposed on the first partition wall layer, the conductive partition wall being electrically connected to the common electrode, a partition wall insulation layer disposed on the conductive partition wall, and a light-emitting element including a pixel electrode disposed on the partition wall insulation layer and electrically connected to the transistor, an intermediate layer disposed on the pixel electrode and including an emission layer, and a counter electrode disposed on the intermediate layer and electrically connected to the conductive partition wall, wherein the first partition wall layer includes an aluminum alloy.