Convex-Concave Display Electrodes for Precise LED Alignment
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Solution Overview
Problem
Current display devices face challenges in achieving excellent alignment of light emitting elements, leading to inefficiencies and reduced performance due to unarranged light emitting elements.
Innovation Solution
A display device design featuring a substrate with first and second electrodes having convex and concave portions, alternately arranged along a direction, and light emitting elements positioned between these portions, with an insulating layer and contact electrodes to enhance alignment and electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional flat electrode structures are used, then manufacturing is simple, but light emitting elements cannot be aligned properly
Solution Approach 1:
The electrode surface is segmented into convex and concave portions, creating multiple discrete alignment sites. This segmentation allows light emitting elements to be precisely positioned at specific locations (convex or concave portions) rather than requiring continuous alignment across a flat surface, thereby improving alignment precision while maintaining manageable manufacturing complexity.
Solution Approach 2:
The electrode structure transitions from a two-dimensional flat surface to a three-dimensional structure with convex and concave portions. This dimensional change creates vertical relief features that provide mechanical interlocking and precise positioning for light emitting elements, significantly improving alignment precision through the added vertical dimension while the overall structure remains relatively simple.
2Productivity
If light emitting elements are not properly arranged, then device complexity remains low, but operational efficiency and performance decrease
Solution Approach 1:
The convex and concave portions are pre-formed on the electrode surfaces before light emitting elements are attached. This preliminary structuring creates predetermined alignment sites that guide the placement of light emitting elements, ensuring proper arrangement and high operational efficiency without requiring complex real-time alignment processes.
Solution Approach 2:
The convex and concave portions on the electrodes automatically guide and position the light emitting elements during assembly. The geometric features of the electrodes themselves perform the alignment function, eliminating the need for external alignment tools or complex positioning mechanisms, thereby improving both operational efficiency and alignment precision.
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A display device includes a substrate and a display element layer on the substrate. The display element layer includes: first and second electrodes extending along a first direction and spaced apart from each other in a second direction; and light emitting elements electrically connected to the first and second electrodes. The first electrode has a first convex portion convex toward the second electrode and a first concave portion concave in a direction away from the second electrode, and the second electrode has a second convex portion convex toward the first electrode and a second concave portion concave in a direction away from the first electrode. The light emitting elements include a first light emitting element and a second light emitting element, respectively close to the first concave portion and the second concave portion based on an imaginary extension line extending in the first direction between the first electrode and the second electrode.