Monolithic Headlight Lens with Curved Light Tunnel for Total Internal Reflection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current headlight lens designs for vehicles are costly to manufacture and do not efficiently manage light distribution, leading to suboptimal illumination patterns.
Innovation Solution
A monolithic headlight lens made of transparent material, specifically inorganic glass, with a light tunnel that undergoes blank-molding to create a smooth, curved surface for total reflection, guiding light through a bend to form a light-dark boundary, reducing the need for post-treatment and enhancing light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional headlight lens designs are used, then manufacturing costs are high, but light distribution efficiency is poor
Solution Approach 1:
The headlight lens is divided into multiple functional zones: a light tunnel section for total internal reflection, a light passage section for light transmission, and a light-dark boundary section for pattern formation. Each zone has optimized optical properties that work together to improve light distribution efficiency while maintaining manufacturing simplicity through integrated molding.
Solution Approach 2:
Different regions of the lens are assigned different optical functions and material properties. The light tunnel section has a curved cross-section optimized for total internal reflection, the light passage section has specific refractive index characteristics, and the light-dark boundary section creates sharp illumination patterns. This local optimization achieves high light distribution efficiency without increasing overall manufacturing complexity.
2Manufacturing precision
If complex post-treatment processes are applied to achieve smooth surfaces, then surface quality improves, but manufacturing costs increase
Solution Approach 1:
The mold cavity is designed with precise surface geometry that directly forms the required smooth surfaces of the light tunnel, light passage, and light-dark boundary sections during the molding process itself. This preliminary action eliminates the need for subsequent post-treatment operations, reducing manufacturing costs while maintaining high surface quality and optical precision.
Solution Approach 2:
The molding process itself generates the required smooth surfaces through the precision of the mold cavity, making the system self-sufficient. The integrated design of the light tunnel with its curved cross-section and the light-dark boundary section are all formed in one step, allowing the manufacturing process to serve its own precision requirements without external post-processing.
3Ease of operation
If traditional light guiding structures are used, then light entry is simple, but light distribution and reflection efficiency are insufficient
Solution Approach 1:
The light tunnel section is designed with a curved cross-section that optimizes total internal reflection. The curved geometry of the light tunnel walls ensures that light rays entering the tunnel are reflected efficiently toward the light-dark boundary section, significantly improving light reflection efficiency while maintaining simple light entry through the front surface of the lens.
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 solution reduces manufacturing costs and improves light distribution by ensuring total reflection at the tunnel's surfaces, allowing light to exit at specific angles, creating a bright-dark boundary and enhancing illumination efficiency.
Implementation Method 1
a light tunnel section (108A, 108B) with a curved cross-section for total reflection
Implementation Method 2
a light passage section (109) for imaging the bend as a light-dark boundary
Data Source
AI summary
Headlight lens for a vehicle headlight having a monolithic body of transparent material, the monolithic body including at least one light entry face, a light passage section and at least one optically operative light exit face.