Micro-LED Display Pixel Structure for Directed Light Output
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Solution Overview
Problem
Existing display devices face challenges in achieving high light output efficiency due to limitations in the alignment and configuration of light emitting elements, leading to non-uniform light distribution and increased manufacturing complexity.
Innovation Solution
The display device incorporates a novel structure with a first insulating layer, light emitting elements having semiconductor layers with different conductive dopants, and a cover layer to guide light emission, eliminating the need for alignment electrodes, thereby enhancing light output efficiency and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If alignment electrodes and complex layer structures are used to position light emitting elements, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent removes alignment electrodes from the device structure, extracting the function of positioning light emitting elements to the substrate surface itself through patterned regions, thereby simplifying the overall layer structure while maintaining manufacturing precision
Solution Approach 2:
The substrate surface is segmented into distinct patterned regions that guide and position light emitting elements, allowing precise placement without requiring additional alignment electrode layers, thus reducing device complexity while improving manufacturing precision
2Productivity
If light emitting elements are arranged in conventional configurations, then device complexity is reduced, but light output efficiency decreases
Solution Approach 1:
The patent implements local quality by creating specific patterned regions on the substrate with distinct optical and electrical properties, allowing light emitting elements to be positioned and oriented optimally for maximum light output efficiency without requiring complex overall device configuration
Solution Approach 2:
The patterned substrate regions serve as an intermediary structure that facilitates efficient light output by providing built-in positioning and orientation guidance for light emitting elements, eliminating the need for complex alignment mechanisms while maintaining high productivity
3Measurement precision
If pixel size is reduced for higher resolution, then measurement precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent performs preliminary action by pre-defining patterned regions on the substrate before placing light emitting elements, which guides positioning and reduces the precision requirements during subsequent manufacturing steps, enabling smaller pixel sizes without proportionally increasing manufacturing difficulty
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
This configuration improves light output efficiency by directing light emission in a desired direction, reduces manufacturing complexity, and allows for higher resolution displays with reduced pixel size.
Implementation Method 1
at least one light emitting element disposed on the first insulating layer and each having a first end and a second end in a longitudinal direction
Data Source
AI summary
A display device includes pixel areas each having an emission area, and a pixel in each of the pixel areas and including a display element part. The display element part includes a first insulating layer on a substrate, a light emitting element on the first insulating layer and each having first and second ends, a first layer on the first insulating layer and the light emitting element and contacting a first area of each of the first and second ends of the light emitting element, a second layer on the light emitting element and contacting a second area of each of the first and second ends of the light emitting element, and an interlayer insulating layer between the first layer and the second layer. The first layer and the second layer include a semiconductor material.