Display Electrodes With Offset Openings for Luminance and Durability
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Solution Overview
Problem
Current display devices, particularly inorganic light emitting diodes, face challenges in achieving high luminance due to limitations in electrode design and light emitting element alignment, which affects their efficiency and durability, especially in high-temperature environments.
Innovation Solution
A display device design featuring a substrate with spaced electrodes, insulating layers, and strategically placed contact electrode layers to expose portions of the electrodes, allowing for efficient electrical connection and alignment of light emitting elements, thereby enhancing luminance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional electrode design is used, then device structure is simple, but luminance is insufficient
Solution Approach 1:
The electrode is divided into multiple segments with different transparency levels. The first electrode includes a first region with higher transparency and a second region with lower transparency, allowing different areas to serve different functions in light emission and electrical connection, thereby improving overall luminance while maintaining structural feasibility
Solution Approach 2:
Different regions of the electrode are assigned different optical properties. The first region is designed with higher transparency to maximize light emission, while the second region has lower transparency to provide stable electrical connection. This local differentiation optimizes both luminance and electrical performance without requiring complete redesign of the entire electrode structure
2Productivity
If light emitting elements are densely arranged, then productivity increases, but alignment precision deteriorates
Solution Approach 1:
A transfer layer is introduced as an intermediary component between the light emitting elements and the substrate. This transfer layer facilitates precise positioning and alignment of the light emitting elements during the transfer process, enabling high-density arrangement while maintaining manufacturing precision through controlled transfer mechanisms
Solution Approach 2:
The alignment problem is addressed by utilizing the thickness dimension of the transfer layer. By controlling the position and thickness of the transfer layer in the vertical dimension, precise horizontal alignment of light emitting elements is achieved, enabling high-density arrangement without sacrificing positioning accuracy
3Reliability
If inorganic light emitting diodes are used, then durability in high-temperature environments improves, but manufacturing complexity increases
Solution Approach 1:
The transfer layer is designed to automatically facilitate the transfer and alignment of inorganic light emitting diodes during the manufacturing process. The layer's structural properties enable self-alignment and secure positioning, reducing the need for complex external manipulation equipment and processes while maintaining the durability benefits of inorganic materials
Data Source
AI summary
A display device includes a substrate, a first electrode, and a second electrode spaced from each other on the substrate, a first insulating layer on the first electrode, a first light emitting element between the first electrode and the second electrode, a second light emitting element on the first insulating layer and spaced from the first light emitting element, and a second insulating layer on the first insulating layer and covering at least a portion of the second light emitting element, wherein the first insulating layer includes at least one first opening penetrating the first insulating layer to expose a portion of the first electrode, the second insulating layer includes at least one second opening penetrating the second insulating layer to expose a portion of the first insulating layer, the at least one first opening and the at least one second opening do not overlap each other.