Flexible Display Substrate Layout With Variable-Thickness Electrodes
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Solution Overview
Problem
Existing flexible display apparatuses face challenges in efficiently arranging light-emitting elements and electrodes to achieve optimal display performance and flexibility.
Innovation Solution
A flexible display apparatus is designed with a substrate featuring island portions, bridge portions, and opening portions, along with light-emitting elements and protruding electrodes of different thicknesses, where the electrodes include a first and second protruding electrode with varying thicknesses and are connected to specific light-emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protruding electrodes of different thicknesses are used to connect light-emitting elements of different sizes, then connection reliability and display performance are improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by making protruding electrodes have different thicknesses at different locations corresponding to different light-emitting element sizes. Larger light-emitting elements are connected to thicker protruding electrodes while smaller elements are connected to thinner electrodes, optimizing connection reliability for each specific case rather than using a uniform electrode thickness throughout.
Solution Approach 2:
The patent changes the physical parameter of electrode thickness to match the size of light-emitting elements. By varying the thickness parameter of protruding electrodes based on the size requirements of different light-emitting elements, the patent achieves better mechanical and electrical connection reliability while maintaining manufacturing feasibility through controlled parameter variation.
2Measurement precision
If light-emitting elements are densely arranged on island portions, then display resolution is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent divides the substrate into multiple island portions with bridge portions connecting them. This segmentation allows light-emitting elements to be densely arranged on each isolated island portion while the bridge portions provide structural support and flexibility, enabling high display resolution without proportionally increasing manufacturing precision requirements across the entire display area.
Solution Approach 2:
The patent introduces a third dimension by creating protruding electrodes that extend vertically from the substrate surface. This dimensional change allows for better mechanical connection and electrical contact between the substrate and light-emitting elements, facilitating denser arrangements on island portions while maintaining connection reliability through the additional vertical dimension.
3Adaptability or versatility
If flexible substrate structure with island and bridge portions is used, then flexibility is improved, but structural complexity increases
Solution Approach 1:
The patent segments the substrate into island portions and bridge portions, where island portions can be independently arranged to accommodate light-emitting elements and bridge portions provide flexible connections between islands. This segmentation enables the substrate to bend and flex more easily while maintaining structural integrity, achieving flexibility without requiring a completely different substrate design.
Solution Approach 2:
The bridge portions serve multiple functions: they mechanically connect island portions, provide flexibility for bending, and can accommodate routing of electrical connections. This multi-functionality reduces the need for separate components, achieving flexibility while minimizing the increase in overall structural complexity.
Data Source
AI summary
A display apparatus includes a substrate including a plurality of island portions spaced apart from each other, a bridge portion connecting the plurality of island portions to each other, and an opening portion arranged between the plurality of island portions, light-emitting elements arranged in each of the plurality of island portions, and protruding electrodes arranged between the substrate and the light-emitting elements and connected to the light-emitting elements, wherein the protruding electrodes include a first protruding electrode and a second protruding electrode, wherein a thickness of the first protruding electrode is different from a thickness of the second protruding electrode.