Anisotropic Light Diffuser Plate Curvature Control
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Solution Overview
Problem
Existing light diffuser plates do not effectively control the shape of diffused light, which is a limitation in modern devices that require tailored light projection surfaces.
Innovation Solution
A light diffuser plate with a base material and a group structure of densely arranged convexities or concavities having anisotropic shapes, where the boundaries between adjacent features include curved lines with varying curvatures, allowing for controlled light distribution angles and reduced diffraction components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional light diffuser plates are used, then light diffusion is achieved, but the shape of diffused light cannot be controlled
Solution Approach 1:
The patent applies local quality by creating convexities with anisotropic shapes (different curvatures in different directions) rather than uniform isotropic shapes. Each convexity has specific curvature values in the first and second directions, allowing localized control of light diffusion characteristics to achieve desired anisotropic light distribution patterns
Solution Approach 2:
The patent changes geometric parameters of the convexities by specifying different curvature values (first curvature and second curvature) in orthogonal directions. By adjusting these curvature parameters and their ratios, the patent controls the anisotropic shape of diffused light to match various projection surface requirements
2Illumination intensity
If light diffusion is enhanced, then light distribution improves, but diffraction patterns increase
Solution Approach 1:
The patent employs asymmetry by designing convexities with different curvatures in orthogonal directions (first curvature ≠ second curvature). This asymmetric, anisotropic shape control allows optimization of light diffusion while suppressing diffraction patterns that arise from symmetric structures, thereby improving light distribution homogeneity without enhancing harmful diffraction
Solution Approach 2:
The patent utilizes controlled curvature by specifying particular first and second curvature values for the convexity surfaces. By carefully designing these curvature parameters and their relationships, the patent achieves smooth light diffusion that reduces diffraction effects while maintaining homogeneous illumination distribution
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
Enables precise control over the anisotropic shape of diffused light, improving light diffusion efficiency and homogeneity, and reducing diffraction patterns, thus enhancing the performance of image display and lighting devices.
Implementation Method 1
A light diffuser plate that scatters incoming light to various directions is widely utilized in various devices... One of the light diffuser plates which utilize the light refraction resulting from the surface shape is what is called a microlens array light diffuser plate
Implementation Method 2
a group structure including a plurality of convexities or concavities provided on at least one main surface of the base material and having anisotropic shapes extended in a common direction... Surfaces of the convexities or concavities may include curved surfaces
Data Source
AI summary
To provide a light diffuser plate that can control an anisotropic shape of diffused light. The light diffuser plate includes a base material, and a group structure including a plurality of convexities or concavities provided on at least one main surface of the base material and having anisotropic shapes extended in a common direction. The plurality of convexities or concavities are arranged randomly and densely on the main surface of the base material. A boundary between adjacent ones of the plurality of convexities or concavities includes a plurality of curved lines having curvatures different from each other.