Light-Emitting Module With Recessed Light-Guiding Layer
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Solution Overview
Problem
Conventional direct-type back light modules using frame type packages have limited light-emitting efficiency and create dark zones due to long distances between LEDs, leading to poor visual perception, and reducing LED distance increases costs by requiring more LEDs.
Innovation Solution
A light-emitting module structure featuring a substrate with LEDs, a light-guiding layer having recesses, crosstalk resistant structures, scattering structures, and reflection structures, which enhance light distribution and reduce the number of LEDs needed by optimizing light transmission and reducing dark zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the distance between light-emitting diodes is reduced, then light-emitting efficiency and uniformity are improved, but the number of light-emitting diodes increases causing cost increase
Solution Approach 1:
The patent introduces a light-guiding layer with microstructures (recesses, protrusions, scattering structures, reflection structures) that manipulate light propagation in three-dimensional space. These structures extend the light transmission path and improve light distribution uniformity without requiring reduced spacing between LEDs, thus maintaining cost-effectiveness while achieving better illumination efficiency and uniformity.
Solution Approach 2:
The light-guiding layer acts as an intermediary between the light-emitting diodes and the display surface. It contains various microstructures (recesses, protrusions, scattering structures, reflection structures) that mediate light propagation, extending the transmission path and improving light distribution without requiring the LEDs to be placed closer together.
2Illumination intensity
If the distance between light-emitting diodes is reduced, then dark zones are eliminated improving visual perception, but manufacturing cost increases
Solution Approach 1:
The patent uses three-dimensional microstructures within the light-guiding layer to extend light transmission paths and eliminate dark zones. This approach achieves uniform light distribution without requiring reduced LED spacing, thereby avoiding increased manufacturing costs associated with higher LED quantities.
Solution Approach 2:
The light-guiding layer incorporates localized microstructures (recesses, protrusions, scattering structures, reflection structures) at specific positions to optimize light propagation in different regions. This localized optimization eliminates dark zones and improves uniformity without requiring a complete redesign or increased LED density across the entire module.
3Device complexity
If conventional frame type package is used, then device structure is simple, but light-emitting angle is small and light-emitting efficiency is low
Solution Approach 1:
The patent transitions from a conventional two-dimensional frame-type package to a three-dimensional light-guiding structure with microrecesses, protrusions, and internal scattering/reflection structures. This dimensional enhancement extends light transmission paths and increases light-emitting angle and efficiency while maintaining reasonable structural complexity.
Solution Approach 2:
The light-guiding layer is constructed as a composite structure containing multiple functional elements: recesses, protrusions, scattering structures, and reflection structures. This composite design achieves superior light-emitting efficiency and angle compared to simple frame packages, while the integration of these elements maintains manufacturing feasibility.
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 proposed structure improves light-emitting efficiency and uniformity, allowing for longer distances between LEDs while maintaining brightness and reducing costs by minimizing the number of LEDs required, thus addressing the limitations of conventional modules.
Implementation Method 1
a light-guiding layer covering the light-emitting diodes
Implementation Method 2
each of the reflection structures is arranged between two adjacent light-emitting diodes and disposed on two opposite sides of the each of the crosstalk resistant structures
Implementation Method 3
each of the scattering structures is arranged between two adjacent light-emitting diodes and disposed on two opposite sides of the each of the crosstalk resistant structures
Data Source
AI summary
A light-emitting module structure includes a substrate, a plurality of light-emitting diodes (LEDs) disposed on the substrate, and a light-guiding layer covering the light-emitting diodes. The light-guiding layer has an upper surface, the upper surface has a plurality of recesses, and the recesses are above the light-emitting diodes or between the light-emitting diodes. This light-emitting module structure can improve the brightness and uniformity of the light-emitting module.