Protruding Electrode Alignment for Microscale LED Displays
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Solution Overview
Problem
Microscale light emitting diode (LED) elements in display devices often fail to align uniformly due to the absence of a structured electrode configuration, leading to inconsistent light emission and image quality.
Innovation Solution
A display device design featuring a substrate with first and second electrodes, each having protruding electrodes that guide and electrically connect microscale LED elements, enhancing alignment through an electric field-induced dielectrophoretic force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If microscale LED elements are provided for the first electrode and the second electrode, then the light emitting elements can be arranged in a matrix, but the microscale LED elements cannot be uniformly aligned
Solution Approach 1:
The first electrode is divided into multiple first protruding electrodes, and the second electrode is divided into multiple second protruding electrodes. This segmentation creates discrete alignment reference points that guide the microscale LED elements into uniform positions, resolving the alignment uniformity issue while maintaining the ability to arrange multiple light emitting elements in a matrix configuration.
Solution Approach 2:
The protruding electrodes serve as intermediary structures between the main electrodes and the microscale LED elements. These intermediaries provide physical guidance and electrical connection points that enable uniform alignment and reliable electrical connection, solving both the alignment and connectivity challenges.
2Quantity of substance
If a plurality of microscale LED elements is provided, then the display resolution is improved, but the alignment degree deteriorates
Solution Approach 1:
By segmenting the electrodes into multiple protruding elements, each protruding electrode pair acts as an independent alignment guide for individual microscale LED elements. This allows a large number of light emitting elements to be arranged with high precision, maintaining alignment degree even as the total quantity increases.
Solution Approach 2:
Each protruding electrode pair provides localized alignment quality control. The local structure of protruding electrodes ensures that each microscale LED element is precisely positioned at its specific location, enabling high overall alignment degree across the entire display while accommodating a large number of elements.
3Manufacturing precision
If protruding electrodes are added to improve alignment, then the alignment degree is improved, but the device complexity increases
Solution Approach 1:
The protruding electrodes combine multiple functions into a single structure: they serve as alignment guides, electrical connection terminals, and positioning references simultaneously. This merging reduces the need for separate alignment structures and simplifies the overall device architecture despite the increased precision capability.
Solution Approach 2:
The protruding electrodes are multi-functional components that perform alignment guidance, electrical connection, and structural support functions. This universality means that while the electrode structure is more complex, it eliminates the need for additional separate components, thereby managing overall device complexity effectively.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution improves the alignment degree and uniform spacing of microscale LED elements, resulting in enhanced light emission and image quality by ensuring consistent electrical connections and improved contact areas.
Implementation Method 1
Voltages of the opposite polarities are applied to the first electrode and the second electrode, and a plurality of microscale LED elements are aligned toward the first electrode and the second electrode by an electric field formed between the first electrode and the second electrode
Data Source
AI summary
A display device includes a substrate, a first electrode disposed on the substrate, a second electrode disposed on the substrate and spaced apart from the first electrode, a plurality of first protruding electrodes disposed on the first electrode, a plurality of second protruding electrodes disposed on the second electrode, and a plurality of light emitting elements electrically connected to the plurality of first protruding electrodes and the plurality of second protruding electrodes.