Floating Third-Electrode Layout for Dense Micro-LED Pixel Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current techniques for manufacturing subminiature light emitting elements with inorganic crystal structures face challenges in controlling the alignment density and distribution of light emitting elements in display devices, affecting the luminance and resolution of the pixels.
Innovation Solution
A light emitting device design featuring first and second electrodes with a third electrode that floats, allowing for controlled alignment density of light emitting elements by varying the electric field distribution, thereby increasing luminance and facilitating design changes in pixel shape and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the density of light emitting elements is increased to enhance luminance, then the luminance per unit surface area is improved, but the pixel size cannot be reduced and manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by creating non-uniform electrode pairs with different spacing distances within the same pixel. Some electrode pairs have shorter distances to concentrate light emitting elements in specific regions, while other pairs have longer distances. This local variation in electrode spacing allows different regions of the pixel to have different densities of light emitting elements, enabling high luminance in specific areas without requiring the entire pixel to be large.
Solution Approach 2:
The patent changes the parameter of electrode spacing distance to control the alignment density of light emitting elements. By varying the distance between adjacent electrodes in different electrode pairs, the patent directly controls where light emitting elements align and how densely they pack. This parameter change allows optimization of luminance density without proportionally increasing pixel area.
2Illumination intensity
If the density of light emitting elements is increased to enhance luminance, then the luminance per unit surface area is improved, but the manufacturing complexity and alignment control difficulty increase
Solution Approach 1:
The patent uses local quality by designing electrode pairs with locally different spacing characteristics. Each electrode pair can be independently designed with specific spacing to create desired alignment density in its region. This localized approach simplifies manufacturing because each electrode pair acts as an independent alignment control unit, making it easier to manage overall alignment complexity compared to uniform high-density designs.
Solution Approach 2:
The patent segments the pixel into multiple electrode pairs, where each pair functions as an independent unit for controlling light emitting element alignment. This segmentation allows the complex task of high-density alignment to be broken down into simpler, repeating units with varying spacing characteristics, reducing overall manufacturing complexity while achieving high luminance.
3Illumination intensity
If non-uniform distribution of light emitting elements is created to control alignment density, then luminance distribution is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by designing specific electrode pairs with shorter spacing distances to create regions of higher light emitting element density. These locally optimized electrode pairs require precise manufacturing only in specific areas where high density is needed, rather than across the entire pixel. This localized precision requirement is more manageable than uniform high-precision requirements across all electrode pairs.
Solution Approach 2:
The patent creates dynamic variation in electrode spacing across different pairs, allowing the system to achieve non-uniform light emitting element distribution through geometric design rather than requiring precise control of each individual element placement. The varying spacing distances provide built-in guidance for element alignment, reducing the need for post-manufacturing precision adjustments.
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 enables precise control over light emitting element alignment, enhancing luminance per unit surface area and allowing for reduced pixel size while maintaining high resolution.
Implementation Method 1
A light emitting device design featuring first and second electrodes with a third electrode that floats, allowing for controlled alignment density of light emitting elements by varying the electric field distribution
Data Source
AI summary
A light emitting device may include first electrodes and second electrodes that are spaced apart from each other in a first direction, light emitting elements electrically connected between adjacent first and second electrodes among the first and the second electrodes, and a third electrode spaced apart from the first electrodes and the second electrodes. The third electrode may be electrically separated from the first electrodes and the second electrodes.