Vehicular Lamp Lens Segmentation for Heat Management
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Solution Overview
Problem
Existing vehicular lamps that form multiple light distributions using a single lamp unit face challenges in heat management due to close proximity of light sources, leading to potential overheating issues.
Innovation Solution
A vehicular lamp design featuring a first lens with positive refractive power and a second lens with multiple positive refraction areas, where light sources are positioned at focal points of the second lens, allowing them to be spaced apart and effectively cooled, while the first lens converges light from the second lens to emit it as parallel light, enabling the formation of multiple light distributions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If light sources are arranged close to each other to share a projection lens in a single lamp unit, then the lamp size is reduced, but heat buildup occurs due to insufficient spacing for cooling
Solution Approach 1:
The projection lens is segmented into a first lens and a second lens with multiple positive refraction areas. This segmentation allows multiple light sources to be positioned at different focal points corresponding to different positive refraction areas, enabling better heat dissipation while maintaining a compact single-lamp-unit structure.
Solution Approach 2:
The second lens acts as an intermediary optical element that receives light from multiple light sources positioned at its focal points and directs it to the first lens. This intermediary structure enables spatial separation of light sources for heat management while maintaining optical integration in a single lamp unit.
2Adaptability or versatility
If multiple light sources are positioned close together, then a single lamp unit can form multiple light distributions, but heat management becomes difficult
Solution Approach 1:
Different areas of the second lens are designed with specific positive refraction areas corresponding to different light sources. Each positive refraction area has optimized optical properties to handle light from its corresponding light source, enabling local heat management and multiple light distributions simultaneously.
Solution Approach 2:
The patent uses multiple positive refraction areas on the second lens to create separate optical paths for different light sources in the vertical dimension. This allows light sources to be arranged at different positions (including vertically separated positions) while still forming multiple light distributions through a single lamp unit.
3Temperature
If light sources are spaced apart to improve cooling, then heat management is improved, but the lamp unit size increases
Solution Approach 1:
The first lens and second lens are nested in sequence, with the second lens positioned behind the first lens. This nested arrangement allows multiple light sources to be spaced apart for heat management while maintaining a compact overall lamp unit structure through integrated optical path design.
Solution Approach 2:
The use of curved lens surfaces with specific refraction properties enables compact optical path folding. The spherical or aspherical surfaces of the lenses allow light to be redirected efficiently, maintaining compact lamp unit dimensions even when light sources are spaced apart for cooling.
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
This design allows for the effective spacing of light sources, reducing heat buildup and enabling a single lamp unit to produce multiple light distributions, such as low and high beams, while maintaining a compact and efficient cooling system.
Implementation Method 1
a first lens (12) having a positive refractive power on a front surface and a rear surface
Implementation Method 2
a second lens (14) positioned behind the first lens (12) and having a plurality of positive refraction areas (14u, 14d) each having a positive refraction power
Data Source
AI summary
The present disclosure provides a lamp unit including: a first lens that has a positive refractive power on a front surface and a rear surface thereof; a second lens that is positioned behind the first lens and has a plurality of positive refraction areas each having a positive refractive power; and a plurality of light sources that are arranged near focal points of the positive refractive areas. Thus, the light sources may be arranged to be spaced apart from each other.