Micro-LED Display Panel Film Openings for Device Reliability
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Solution Overview
Problem
Current micro-LED display panels face challenges in reliability due to limitations in their structure and manufacturing processes, which affect the performance and durability of the light-emitting devices.
Innovation Solution
The proposed display panel includes an array layer with light-emitting devices, a first film layer, and a first electrode, where openings are formed on the film layer to overlap the light-emitting devices, enhancing protection and stability. The method involves providing an array layer, arranging light-emitting devices, applying a first film layer, forming openings, and placing a first electrode on the film layer to improve reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional micro-LED display structure is used, then the display can achieve high brightness and rapid response, but the reliability and durability are insufficient
Solution Approach 1:
The display panel is divided into multiple functional layers including array substrate, light-emitting devices, film layer, and electrode layer. Each layer performs a specific function, allowing the system to achieve high reliability through modular design while maintaining manageable complexity through clear functional separation.
Solution Approach 2:
The patent introduces a vertical stacking dimension by arranging components in multiple layers (array layer, film layer, electrode layer) rather than a single plane. This vertical arrangement improves reliability by providing protective barriers and stable electrical connections while organizing complexity in the vertical dimension rather than horizontal spread.
2Reliability
If the light-emitting devices are directly exposed, then the manufacturing process is simpler, but the protection and stability of the devices are reduced
Solution Approach 1:
The film layer is formed over the light-emitting devices before final assembly, providing preliminary protection and defining opening positions in advance. This preliminary action stabilizes the devices during subsequent manufacturing steps while the opening formation process is simplified through direct patterning over the light-emitting regions.
Solution Approach 2:
The film layer is designed with local openings only where needed for light emission, while maintaining coverage over other areas for protection. This localized modification provides stability where required without unnecessarily complicating the manufacturing process in non-critical areas.
3Reliability
If additional protective layers and electrodes are added, then the protection and electrical connection stability improve, but the manufacturing process becomes more complex
Solution Approach 1:
The film layer serves multiple functions simultaneously: it provides mechanical protection for the light-emitting devices, defines the opening positions for light emission, and serves as a substrate for the electrode layer. This multi-functionality improves reliability through comprehensive protection while avoiding the need for separate dedicated layers for each function, thereby simplifying the overall manufacturing process.
Solution Approach 2:
The patent combines the protective function, structural support function, and electrical connection function into an integrated multi-layer structure. The film layer and electrode layer are combined in a single fabrication sequence, where the electrode is formed directly on the film layer openings, merging multiple functions into a unified structure that improves reliability without proportionally increasing manufacturing complexity.
Data Source
AI summary
A display panel, a method for fabricating the display panel and a display device are provided to improve reliability of the display panel. The display panel includes an array layer, one or more light-emitting devices arranged on the array layer, a first film layer at least partially arranged on the one or more light-emitting devices, and a first electrode arranged on the first film layer. Openings are formed on the first film layer, and at least part of the openings overlap the respective light-emitting devices. The display device including the display panel and the method for fabricating the display panel are further provided.