Display Electrode Layout With Guiding Patterns for Element Alignment
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Solution Overview
Problem
Existing display devices face challenges in minimizing the number of light-emitting elements that are lost during fabrication and improving the alignment of these elements on electrodes.
Innovation Solution
A display device design that includes a plurality of patterns disposed between banks on which electrodes are arranged, allowing for improved alignment and reduced loss of light-emitting elements by guiding them to be placed between the patterns during fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light-emitting elements are disposed on the substrate without patterns, then the fabrication process is simple, but many light-emitting elements are lost because they are not properly aligned with electrodes
Solution Approach 1:
The invention divides the space between banks into multiple regions by introducing patterns, which segment the area into distinct zones. These patterns create height differences that guide light-emitting elements to specific locations, ensuring proper alignment with electrodes while maintaining a manageable structural complexity.
Solution Approach 2:
The invention utilizes the thickness direction (vertical dimension) by creating height differences through patterns with varying thicknesses. This dimensional approach guides light-emitting elements to proper positions without complicating the planar layout, resolving the contradiction between alignment precision and structural simplicity.
2Productivity
If light-emitting elements are disposed without guidance structures, then the fabrication process is simple, but the number of lost light-emitting elements increases
Solution Approach 1:
The patterns are pre-formed on the substrate before light-emitting elements are disposed. These patterns create predetermined height differences that guide elements to correct positions during fabrication, improving yield by preventing misalignment losses while adding minimal structural complexity.
Solution Approach 2:
The patterns act as intermediary structures between the banks and light-emitting elements. They provide a mediating mechanism that guides elements to proper positions without requiring complex fabrication processes, thus improving productivity while maintaining relative structural simplicity.
3Manufacturing precision
If patterns are added between banks to guide light-emitting elements, then alignment is improved, but the device structure becomes more complex
Solution Approach 1:
The patterns are strategically placed only in specific regions between banks where guidance is needed, rather than uniformly across the entire structure. This localized approach improves alignment precision while minimizing the overall increase in device complexity.
Data Source
AI summary
A display device comprises a plurality of first banks disposed on a substrate to extend in a first direction and spaced apart from one another, a plurality of first patterns disposed between the plurality of first banks and spaced apart from one another in the first direction, a first electrode and a second electrode extending in the first direction and disposed on different first banks of the plurality of first banks and spaced apart from each other, a first insulating layer overlapping the plurality of first patterns, disposed on the first substrate, and to partially overlapping the first and second electrodes, and a plurality of light-emitting elements disposed on the first insulating layer so that first and second ends of each of the plurality of light-emitting elements are disposed on the first and second electrodes, respectively.