Pixel Electrode Layout for Aligning Subminiature Light Emitters
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Solution Overview
Problem
Current display devices face challenges in efficiently utilizing subminiature light emitting elements in pixel emission areas, leading to suboptimal light source formation and emission efficiency.
Innovation Solution
A display device design featuring a pixel structure with specifically arranged electrodes and light emitting elements, where the electrodes are spaced apart by a distance equal to or less than the length of the light emitting elements, allowing for efficient electrical connection and alignment of the elements to form a light source unit within the emission area, enclosed by a bank to enhance light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrodes are spaced apart to accommodate subminiature light emitting elements, then light source formation is improved, but electrical connection reliability deteriorates
Solution Approach 1:
The first electrode is divided into three separate electrode parts (first, second, and third electrode parts) that are spatially distributed around the second electrode. This segmentation allows each electrode part to independently establish electrical connections with light emitting elements, improving connection reliability while maintaining the spaced-apart configuration necessary for light source formation.
Solution Approach 2:
The electrode parts are arranged in different spatial dimensions around the second electrode, with electrode parts extending in different directions. This multi-dimensional arrangement maximizes the utilization of spatial space, enabling reliable electrical connections from multiple directions while maintaining the overall spaced-apart configuration for effective light emission.
2Manufacturing precision
If multiple electrode parts are used to improve alignment, then light emitting element alignment is improved, but device complexity increases
Solution Approach 1:
The first, second, and third electrode parts are electrically connected to each other, effectively merging them into a unified first electrode structure. This merging approach provides multiple alignment points for light emitting elements without requiring completely separate electrode structures, thereby improving alignment precision while controlling device complexity through electrical integration.
Solution Approach 2:
The multiple electrode parts serve dual functions: they provide multiple alignment references for light emitting elements and simultaneously establish electrical connections. This multi-functionality reduces the need for additional separate components, improving alignment precision without proportionally increasing device complexity.
Data Source
AI summary
A display device includes a plurality of pixels, each of the plurality of pixels including an emission area, a first electrode and a second electrode that are disposed in the emission area to be spaced apart from each other, and a plurality of light emitting elements that are electrically connected between the first and second electrodes, and a bank disposed between the emission area of each of the plurality of pixels to enclose the emission area. The first electrode includes a first electrode part disposed in the emission area to be adjacent to a first side of the second electrode, a second electrode part disposed in the emission area to be adjacent to a second side of the second electrode, and a third electrode part electrically connecting the first and second electrode parts and disposed in the emission area to be adjacent to a third side of the second electrode.