Dual-Function Automotive Lighting Module with Optical Lens Illumination
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Solution Overview
Problem
Existing motor vehicle headlight lighting modules with dual-function capabilities suffer from unlit appearance of the projection lens when the second lighting sub-module is off, and the projection lens is not illuminated during low-beam lighting, affecting the overall appearance.
Innovation Solution
A lighting module design that includes an optical device to redirect light rays from the primary light source to the second projection lens when the second lighting sub-module is off, ensuring illumination without additional sources, using reflection surfaces to achieve this redirection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual-function lighting module is used to provide both low-beam and high-beam functions, then the lighting functionality is improved, but the projection lens appears unlit when the second lighting sub-module is off, affecting the overall appearance
Solution Approach 1:
An optical device is introduced as an intermediary element between the first lighting sub-module and the second projection lens. This optical device redirects light rays from the primary light source toward the second projection lens, ensuring that the lens maintains an illuminated appearance even when the second lighting sub-module is inactive, thus resolving the appearance issue while preserving dual-function capability
2Illumination intensity
If an optical device is added to illuminate the second projection lens, then the appearance is improved, but the device complexity increases
Solution Approach 1:
The optical device serves multiple functions: it redirects light to illuminate the second projection lens for aesthetic purposes, and simultaneously manages light distribution within the dual-function lighting module. By making the optical device multi-functional, the patent avoids adding separate dedicated illumination components, thereby limiting the increase in device complexity while achieving the desired illumination effect
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
Ensures the second projection lens is illuminated when the second lighting sub-module is inactive, maintaining a uniform appearance and avoiding the need for additional light sources, while maintaining the compactness and simplicity of the module design.
Implementation Method 1
a primary collector with a reflective surface capable of reflecting light rays emitted by said primary light source into a first primary reflected light beam
Implementation Method 2
an optical device configured to return to the second projection lens light rays coming directly from the primary light source of the first lighting sub-module and passing in front of the reflective surface of the primary collector
Data Source
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AI summary
The invention relates to a motor-vehicle lighting module (2), comprising a first lighting sub-module (5) comprising a light source (6.3) able to form a first light beam; a second lighting sub-module (10) able to form a second light beam; a second projection lens (12) for projecting the second light beam, contiguous to a first projection lens (8); and an optical device (18) configured to redirect to the second projection lens (12) light rays that originate directly from the light source (6.3) of the first lighting sub-module (5) and that pass in front of the reflective surface (6.2) of the first lighting module (5), so as to make said second projection lens (12) appear illuminated even when the second lighting sub-module (10) is turned off.