Vehicle Luminous Module Secondary Light Guide Parasitic Ray Control
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Solution Overview
Problem
Existing vehicle light modules suffer from parasitic light rays that degrade the quality of the beam, causing light overintensities and spots outside the main beam, which can lead to reduced visibility and dazzling of oncoming drivers.
Innovation Solution
A light module design incorporating secondary light guides that deflect and spread parasitic light rays, preventing them from reaching the projection field and reducing their intensity, thereby improving beam quality and reducing the risk of dazzling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the light sources are positioned opposite the entrance edges of the light guides, then the beam coverage is improved, but stray light rays are generated that degrade beam quality
Solution Approach 1:
The patent extracts and isolates the harmful stray light rays from the main beam path by introducing dedicated light guides (third and fourth light guides) that specifically capture and redirect parasitic rays away from the projection optics assembly, thereby removing the harmful effect while preserving the beneficial beam coverage
Solution Approach 2:
The patent introduces intermediary light guides (third and fourth light guides) that act as mediators between the light sources and the projection optics. These intermediary guides capture stray rays that would otherwise contaminate the main beam and redirect them to safe paths, thus protecting the beam quality without compromising coverage
2Manufacturing precision
If the projection assembly images the light guides output in a projection field, then the beam precision is improved, but stray rays form visible bright spots that reduce beam quality
Solution Approach 1:
The patent extracts stray rays from the imaging path by directing them into separate light guides (third and fourth light guides) that do not feed into the projection optics assembly, thereby removing the source of bright spots while maintaining the precision imaging of the main beam through the first and second light guides
Solution Approach 2:
The patent segments the light guide system into multiple functional groups: first and second light guides for main beam transmission to the projection assembly, and third and fourth light guides for stray ray capture and redirection. This segmentation allows independent optimization of beam precision and stray light control
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 minimizes parasitic light rays, enhancing the quality and precision of the light beam, providing better visibility for drivers while reducing the risk of dazzling from stray light.
Implementation Method 1
a secondary light guide separate from the primary light guides and arranged to deflect light rays from the light source so as not to reach the output member
Implementation Method 2
arranged to deflect light rays from the light source so as not to reach the output member, and/or to spread said light rays in said projection field
Implementation Method 3
a projection assembly comprising a focal zone and an output member, said projection assembly being arranged so that the light rays passing through said focal zone and reaching the output member are imaged in a projection field downstream of said projection assembly
Data Source
Figure 1~2
Figure 3~4
Figure 5~5B
AI summary
The present invention relates to a luminous vehicle module (1) intended to generate a light beam along an optical axis (I), comprising: - primary light guides (2) each comprising an entrance dioptric interface and an exit dioptric interface; - a light source (9) arranged facing an entrance dioptric interface; - a projecting assembly (4) comprising a focal zone and an exit member (61), said projecting assembly (4) being arranged so that the light rays that pass through said focal zone and reach the exit member (61) are imaged in a projection field downstream of said projecting assembly; - the exits of the guides being arranged in the focal zone. According to the invention, the luminous module (1) comprises at least one secondary light guide (3) that is separate from the primary light guides (2) and arranged so as to deviate light rays generated by the light source (9) so that they do not reach the exit member (61) and/or so as to spread said light rays in said projection field.