Multi-Vertex Pyramid Diffusion Plate for Mini LED Backlight Uniformity
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Solution Overview
Problem
Conventional diffusion plates with hemispherical or single-vertex pyramid-shaped microstructures in Mini LED backlight modules suffer from poor light diffusion effects, with visible light splitting points and inadequate uniformity.
Innovation Solution
A diffusion plate with pyramid-like structures featuring multiple vertex angles, which increases light splitting points by dividing a single light source into eight or more point-light sources, improving light diffusion through a combination of refractive and reflective surfaces with specific geometric configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional diffusion plates with hemispherical or single-vertex pyramid-shaped microstructures are used, then the manufacturing process is simple, but the light diffusion effect is poor with visible light splitting points
Solution Approach 1:
The single vertex of the pyramid structure is segmented into multiple vertices (first convex portion with first vertex angle and second convex portion with second vertex angle). This segmentation increases the number of light splitting points from 4 to 8 or more, improving light diffusion uniformity while maintaining the molded manufacturing process
Solution Approach 2:
Different portions of the pyramid structure have different vertex angles tailored to specific functional requirements. The first convex portion and second convex portion have different vertex angles to optimize light diffusion in different directions, achieving superior local light control quality
2Manufacturing precision
If the number of light splitting points is increased to improve light diffusion, then the light uniformity improves, but the structural complexity of the diffusion plate increases
Solution Approach 1:
Multiple functional portions (first convex portion and second convex portion) are merged into a single integrated pyramid-like structure. This combining approach achieves complex light diffusion functionality (8+ light splitting points) without requiring multiple separate components, thus improving light uniformity while controlling structural complexity
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 diffusion plate significantly enhances light splitting and diffusion effects, achieving more uniform light distribution and reducing the visibility of light splitting points, thereby improving the overall performance of Mini LED backlight modules.
Implementation Method 1
Spectral diffusion is mainly caused by the surface structure
Implementation Method 2
light refraction, reflection and scattering
Implementation Method 3
light refraction, reflection and scattering
Data Source
AI summary
The invention refers to a diffusion plate and a backlight module having the diffusion plate. The diffusion plate comprises a plate-body and a plurality of pyramid-like structures arranged on a surface of the plate-body. Each pyramid-like structure has a bottom surface, a first convex portion and a second convex portion. The first convex portion and the second convex portion have different vertex angles, and therefore the pyramid-like structure can also be called as “pyramid-like structure with multiple vertex angles”. The pyramid-like structures with multiple vertex angles can increase the light splitting points, which can improve the light splitting effect of the diffusion plate. The light source of a single light-emitting diode can be divided into eight point-light sources (light splitting points) or more, which is double the number of light splitting points compared with the traditional pyramid structure with single vertex, and thus can greatly improve the light diffusion effect.