Anisotropic Light Source Lens for Flexible Mini LED Diffusion
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Solution Overview
Problem
Existing mini LEDs face limitations in LED arrangement and light diffusion due to their square shape, leading to reduced autonomy and increased component costs, with isotropic lenses complicating design freedom and causing dark spots.
Innovation Solution
A light assembly featuring an anisotropic lens with a curved upper surface, including a concave portion and peak portions, is used to cover the LED, allowing for greater light diffusion in one direction and improved LED arrangement flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an isotropic lens is used to cover the LED, then light diffusion is achieved in all directions, but the LED arrangement autonomy is reduced and design freedom is limited
Solution Approach 1:
The patent applies asymmetry by replacing the traditional isotropic lens with an anisotropic lens that has different diffusion characteristics in different directions. The lens is designed with a length in a first direction greater than a length in a second direction perpendicular to the first direction, creating asymmetric light diffusion that enhances LED arrangement autonomy and design freedom while maintaining effective light distribution
2Area of stationary object
If mini LEDs are arranged in a square shape, then compact arrangement is achieved, but autonomy in LED arrangement and quantity is reduced
Solution Approach 1:
The patent breaks the square arrangement constraint by implementing asymmetric light diffusion through the anisotropic lens. This allows LEDs to be arranged in non-square patterns with greater autonomy, as the lens compensates for irregular light distribution by directing light more effectively in specific directions, thereby increasing design freedom while maintaining compactness
3Ease of manufacture
If air layers are present between the LED and lens, then assembly is simplified, but light assembly efficiency is reduced
Solution Approach 1:
The patent applies merging by eliminating the air layer between the LED and lens, creating direct contact between the two components. This integration improves light assembly efficiency by reducing light loss at interfaces and enhancing thermal conduction, while the manufacturing process remains feasible through direct bonding or curing methods
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 anisotropic lens enhances light diffusion in a desired direction, increases design freedom, and reduces component costs by eliminating air layers between the LED and lens, thereby improving light assembly efficiency.
Implementation Method 1
the light source lens may have a diffusion angle in the first direction greater than a diffusion angle in the second direction
Implementation Method 2
a light source lens constructed to cover the LED and having a curved upper surface
Implementation Method 3
the light source lens includes an anisotropic lens with a length in a first direction greater than a length in a second direction perpendicular to the first direction
Data Source
AI summary
Provided is a light assembly including a light source substrate having an LED mounted thereon, and a light source lens constructed to cover the LED and having a curved upper surface, wherein the light source lens includes an anisotropic lens with a length in a first direction greater than a length in a second direction perpendicular to the first direction.