Vehicle Lighting Color Correction Element
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Solution Overview
Problem
Existing vehicle lighting devices with semiconductor-based light sources suffer from undesirable color fringes at light-dark borders due to chromatic aberration, and previous solutions involving aspherical partial surfaces are costly.
Innovation Solution
A color correction element with a color correction-free and a color correction-affected partial surface area is introduced between the semiconductor-based light source and the imaging device, where the color correction-free area allows unaltered light to pass through, and the color correction-affected area corrects light beams responsible for color fringes, preventing their occurrence without significant luminous flux reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If aspherical partial surfaces are used to prevent color fringes, then color fringe prevention is achieved, but manufacturing cost increases
Solution Approach 1:
The optical element is segmented into two distinct functional areas: a color correction-free partial surface area and a color correction-affected partial surface area. This segmentation allows each area to perform its specific function optimally while simplifying manufacturing compared to complex aspherical surfaces.
Solution Approach 2:
Different regions of the optical element are assigned different optical properties. The color correction-free area maintains original light transmission, while the color correction-affected area (arranged in a border angle area) specifically addresses chromatic aberration. This local differentiation prevents color fringes without requiring expensive aspherical manufacturing across the entire surface.
2Object-affected harmful factors
If color correction is applied to all light beams, then color fringes are prevented, but luminous flux is significantly reduced
Solution Approach 1:
Color correction is applied partially rather than universally. Only the color correction-affected partial surface area, positioned to intercept border angle light beams, performs color correction. The majority of light beams passing through the color correction-free area remain uncorrected, preserving luminous flux while still preventing color fringes where they occur.
Solution Approach 2:
The solution applies color correction locally only where needed (in the border angle area where color fringes occur) rather than globally across all light beams. This localized approach maintains overall luminous flux while preventing the harmful color fringe effect at critical boundaries.
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 solution effectively prevents color fringes in the light distribution while maintaining the luminous flux, using a cost-effective approach by minimizing light losses and ensuring the light source's color correction before entering the optical element, thus counteracting chromatic aberration.
Implementation Method 1
the appearance of color fringes in a light distribution is prevented... as a result of chromatic aberration
Implementation Method 2
an optical element is arranged between the semiconductor-based light source and the imaging device... having a plurality of refractive micro optical components
Data Source
AI summary
A lighting device for vehicles with a semiconductor-based light source and an optical unit having an imaging device for producing a predetermined light distribution and having an optical element arranged between the semiconductor-based light source and the imaging device. The optical element has a back side facing the semiconductor-based light source and has a front side facing the imaging device. The optical element is formed as a color correction element which has a color correction-free partial surface area through which a firstly emitted partial light beam of the semiconductor-based light source passes and has a color correction-affected partial surface area through which the secondly emitted partial light beam of the semiconductor-based light source passes in a border angle area.