Vehicle Light Module Rear Wall Layout for Color Desaturation
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Solution Overview
Problem
Light modules for vehicles suffer from color desaturation issues, particularly in white taillight elements, which are exacerbated by transparent lenses and result in reduced homogeneity and light yield when attempting to implement multi-colored dual functions.
Innovation Solution
Incorporating a rear wall apparatus with distinct first and second rear wall regions that differ in reflection and absorption properties, allowing for a combination of high reflection and low absorption to maintain homogeneity and reduce color desaturation while achieving desired light functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a colorless or transparent lens is used to allow white taillight elements to be visible by day, then the visibility is improved, but color desaturation occurs
Solution Approach 1:
The rear wall is divided into multiple regions with different optical properties: a first region with high reflection and low absorption to maintain color saturation, and a second region with different properties to ensure homogeneous light distribution. This segmentation allows each region to optimize for its specific function while working together to solve the overall contradiction.
Solution Approach 2:
Different regions of the rear wall are assigned different local qualities (reflection/absorption properties) to address different aspects of the problem. The first region's high reflection property addresses color saturation locally, while the second region's properties address light distribution homogeneity locally, resolving the global contradiction through local optimization.
2Ease of manufacture
If monochromatic light functions with colored lenses are implemented to avoid color desaturation, then color saturation is improved, but multi-colored dual functions cannot be implemented
Solution Approach 1:
The light module is designed to perform multiple functions (different colors and light patterns) within a single integrated structure. The rear wall's multi-region design enables the same optical system to support both color-saturated monochromatic functions and multi-colored dual functions simultaneously, achieving universality.
Solution Approach 2:
The system utilizes variable parameters (different reflection and absorption properties in different regions) to achieve multiple functions. By changing the optical parameters locally across the rear wall, the system can support various light functions including both color-saturated and multi-colored operations.
3Ease of manufacture
If the color and surface structure of the entire rear wall are changed to remedy color desaturation, then color saturation is improved, but homogeneity or light yield is restricted
Solution Approach 1:
Instead of uniformly changing the entire rear wall, only specific regions are modified with different optical properties. The first region is optimized for color saturation while the second region is optimized for light distribution, allowing each property to be enhanced locally without compromising the other globally.
Solution Approach 2:
The rear wall is segmented into functional zones where each zone is optimized for its specific purpose. This segmentation prevents the trade-off that would occur with a uniform design, as each segment can independently optimize for its primary function while contributing to the overall system performance.
4Ease of manufacture
If a surface light guide without a rear wall is used, then manufacturing is simplified, but intensity superimposition of elements located behind one another occurs
Solution Approach 1:
Rather than completely removing the rear wall, the invention extracts only the problematic portions and replaces them with selectively designed regions. The rear wall structure is retained where needed to prevent intensity superimposition, while simplified areas are maintained where they do not cause problems, achieving a balance between manufacturing simplicity and optical performance.
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 reduces color desaturation and enhances light yield by optimizing the rear wall regions' properties, ensuring a uniform and intense light output without compromising the homogeneity of the light module.
Implementation Method 1
a rear wall apparatus (20) is provided which, on its side facing the light-guiding body (24), has at least one first rear wall region (32, 56, 66, 74) and at least one second rear wall region (34, 57, 58, 73), wherein the at least one first rear wall region and the at least one second rear wall region differ from one another in terms of reflection and/or absorption properties
Implementation Method 2
a rear wall apparatus (20) is provided which, on its side facing the light-guiding body (24), has at least one first rear wall region (32, 56, 66, 74) and at least one second rear wall region (34, 57, 58, 73), wherein the at least one first rear wall region and the at least one second rear wall region differ from one another in terms of reflection and/or absorption properties
Data Source
AI summary
A light module for a lighting device of a vehicle is disclosed having at least one illuminant and a light-guiding body which is suitable and destined for guiding radiation emanating from the illuminant and coupled into the light-guiding body to a light exit surface of the light-guiding body, and having at least one rear wall apparatus which is arranged at least in certain areas in the beam path of ambient radiation incident from externally through the light exit surface of the light-guiding body into the light-guiding body. The rear wall apparatus has at least one first rear wall region and at least one second rear wall region, wherein the at least one first rear wall region and the at least one second rear wall region differ from one another in terms of reflection and/or absorption properties, for example with regard to the ambient radiation.