Asymmetric Primary Lens for Vehicle Headlight Illumination
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Solution Overview
Problem
Existing headlight designs fail to effectively diffuse light in the horizontal direction while converging it in the vertical direction, leading to inadequate illumination characteristics, and densely packed LED particles compromise heat dissipation.
Innovation Solution
A primary lens with a focus line extending horizontally and ridges extending vertically, combined with a secondary convex lens and a heat dissipation system, to achieve light diffusion in the horizontal direction and convergence in the vertical direction, while improving heat dissipation through even spacing and arc-shaped transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If LED particles are arranged densely to improve illumination coverage, then the illumination area is increased, but heat dissipation performance deteriorates
Solution Approach 1:
The illumination area is divided into multiple zones with different LED densities. The center region has higher LED density for bright spot illumination, while the peripheral region has lower LED density for heat dissipation and ambient illumination, resolving the contradiction between coverage area and heat management
Solution Approach 2:
Different regions of the headlight have different optical and thermal properties. The optical lens has varying refractive indices in different zones to control light distribution, and the heat dissipation structure has different densities and materials in different areas to optimize both illumination and thermal management locally
2Ease of manufacture
If a standard spherical lens is used, then manufacturing is simple, but light beam control in specific directions is insufficient
Solution Approach 1:
The optical lens transitions from a standard spherical shape to an asymmetric design with different curvature radii in the horizontal and vertical directions. This asymmetric geometry enables independent control of light diffusion in horizontal direction and convergence in vertical direction, achieving precise beam shaping while maintaining manufacturability through injection molding
Solution Approach 2:
The lens surface is designed with specific curvature variations - the horizontal curvature radius differs from the vertical curvature radius. This controlled spheroidality allows the lens to diffuse light horizontally while converging it vertically, providing precise beam control without requiring complex multi-element lens systems
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 effectively satisfies the illumination characteristics of vehicle headlights by diffusing light horizontally and converging it vertically, while enhancing heat dissipation efficiency by distributing LEDs and using silicone for the primary lens.
Implementation Method 1
a straight focus line extending in the second direction is formed on the first optical surface, and the height of the first optical surface is gradually reduced from the focus line to the two sides
Implementation Method 2
the second optical surface comprises a plurality of ridges arranged in a third direction, and the ridges have arc-shaped convex faces
Implementation Method 3
the primary lens is made of silicone
Data Source
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AI summary
Disclosed are a primary lens (100), a light-emitting assembly, a light-emitting system, and a headlight, which relate to the technical field of optical components. The primary lens (100) comprises a main body portion (110), and the main body portion (110) comprises a first optical surface (111) and a second optical surface (112), wherein a linear focus line (113) is formed on the first optical surface (111), and the height of the first optical surface (111) is gradually reduced from the focus line (113) towards two sides; and the second optical surface (112) comprises a plurality of ridges (114) arranged in parallel, with an extension direction of the ridges (114) being perpendicular to the focus line (113), and the ridges (114) have arc-shaped convex faces. Under the conditions where the focus line (113) extends horizontally and the ridges (114) extend vertically, the primary lens (100) can converge light that is incident on the first optical surface (111) in a vertical direction and diffuse the light in a horizontal direction, thereby satisfying the illumination characteristics of a headlight of a vehicle.