Micro LED Refraction Structure for Forward Brightness and Color Purity
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Solution Overview
Problem
Current micro LED display devices suffer from insufficient brightness and light mixing due to wide light-emitting angles and differing light-emitting efficiencies of different color LEDs, leading to poor display quality when viewed from specific angles.
Innovation Solution
Incorporating refraction structures corresponding to each micro LED to adjust light-emitting directions, increasing forward brightness and reducing light mixing by converging light patterns to the center, thereby enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If micro LED display devices use wide light-emitting angles, then the viewing angle is improved, but the forward brightness becomes insufficient
Solution Approach 1:
The patent applies local quality by implementing refraction structures with specific refractive indices at different locations. The refraction structure includes a first region with a first refractive index and a second region with a second refractive index, where the refractive indices differ to optimize light control in different areas, thereby improving forward brightness while maintaining viewing angle characteristics
2Adaptability or versatility
If micro LED display devices have wide light-emitting angles, then the viewing coverage is improved, but light mixing occurs reducing display quality
Solution Approach 1:
The patent implements local quality by creating regions with different refractive indices within the refraction structure. The first region and second region have distinct refractive indices that are specifically designed to control and separate light from different color micro LEDs, preventing light mixing while maintaining wide viewing coverage
Solution Approach 2:
The refraction structure acts as an intermediary between the micro LEDs and the viewer. It mediates the light paths from different color LEDs by refracting light at different angles based on the refractive index distribution, thereby preventing unwanted light mixing while preserving wide viewing angles
3Illumination intensity
If micro LED display devices use different brightness levels for different colors, then the display contrast is improved, but color overflow occurs affecting overall quality
Solution Approach 1:
The patent applies local quality by assigning different refractive indices to different regions of the refraction structure. This allows precise control over light from each color micro LED, ensuring that higher brightness levels for certain colors (like green) do not overflow into adjacent color regions, thereby maintaining both contrast and color accuracy
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 refraction structures effectively increase the brightness of micro LED display devices in the forward direction and improve display quality by minimizing light mixing, resulting in improved visibility and color consistency.
Implementation Method 1
at least one refraction structure is disposed on and corresponds to each micro LED. The refraction structure may change the light-emitting direction of the micro LED
Implementation Method 2
the refraction structure may effectively reduce light mixing, thereby improving the display quality of the micro LED display device
Data Source
AI summary
A micro LED display device is provided. The micro LED display device includes a substrate. The micro LED display device also includes a first micro LED disposed on the substrate. The micro LED display device further includes at least one first refraction structure disposed on and corresponding to the first micro LED. Moreover, the micro LED display device includes a second micro LED disposed on the substrate and adjacent to the first micro LED. The micro LED display device also includes at least one second refraction structure disposed on and corresponding to the second micro LED.