RGBG Micro-LED Display Layout With Color-Specific Optical Patterns
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Solution Overview
Problem
Existing display devices, particularly those using subminiature light emitting diodes, face challenges in optimizing light emission efficiency based on the emission color of these diodes, which affects their performance in applications like head-mounted displays for virtual or augmented reality.
Innovation Solution
A display device design featuring a partition wall defining emission areas in an RGBG matrix pattern, with specific arrangements and optical patterns, and the use of refractive index-matched or mismatched materials to enhance light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If subminiature light emitting diodes are used in display devices, then the device size is reduced and integration is improved, but the light emission efficiency deteriorates due to color-specific optical properties
Solution Approach 1:
The patent applies local quality by implementing color-specific optical patterns and refractive index matching for different emission colors (red, green, blue). Each color channel has optimized optical structures with appropriate refractive indices to maximize light extraction efficiency for that specific wavelength range, thereby resolving the efficiency deterioration while maintaining miniaturization.
2Loss of energy
If optical patterns are added to improve light emission efficiency, then the optical performance is improved, but the device complexity increases
Solution Approach 1:
The patent utilizes parameter changes by adjusting the refractive index of optical patterns and surrounding materials to optimize light emission. By varying refractive index parameters across different color channels and structural layers, the patent achieves improved light extraction efficiency without requiring complex mechanical or geometric modifications, thus managing device complexity.
3Loss of energy
If refractive index-matched materials are used to enhance light emission, then the emission efficiency is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent manages manufacturing precision requirements by systematically selecting and applying refractive index parameters for different materials and layers. By establishing specific refractive index relationships between optical patterns, base resin, and encapsulation materials, the patent achieves efficient light extraction while providing clear fabrication guidelines that balance performance with manufacturability.
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 design improves the emission efficiency of subminiature light emitting diodes, enhancing the performance of display devices, especially in applications requiring high color accuracy and brightness, such as head-mounted displays.
Implementation Method 1
a plurality of optical patterns located on at least one of the plurality of emission areas
Implementation Method 2
a refractive index of the filling member is greater than a refractive index of the base resin or the plurality of optical patterns
Implementation Method 3
a first light emitting element configured to emit a first light in a wavelength range realizing any one of red, green, and blue colors
Data Source
AI summary
A display device includes a partition wall on a substrate, a plurality of light emitting elements respectively located on a plurality of emission areas defined by the partition wall, the plurality of light emitting elements extend in a thickness direction of the substrate, a base resin located in the plurality of emission areas, and a plurality of optical patterns located on at least one of the plurality of emission areas, wherein the plurality of emission areas are arranged in a RGBG matrix pattern by the partition wall.