Motor Vehicle Lighting Device with Offset Rotational Axis
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Solution Overview
Problem
Existing automotive vehicle lighting systems face issues where heavy loads cause the illumination beam to be directed above the predetermined horizon line, potentially dazzling other road users, necessitating wider protective outer lenses that compromise the signature of the illumination beam.
Innovation Solution
A lighting device with a luminous module that can be rotated about an axis offset from the module, passing through a space defined by the screen, ensuring the beam remains centered on the main projection area regardless of vehicle load, using a system that allows rotational movement combined with translation or complex movements to maintain regulatory and aesthetic compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the protective outer lens is made wider to accommodate beam projection at all inclination angles, then regulatory requirements are met, but the signature of the illumination beam is compromised due to gaps appearing between the lens edge and the beam
Solution Approach 1:
The patent implements a dynamic adjustment mechanism that pivots the luminous module about a longitudinal axis to change the inclination angle of the illumination beam. This allows the beam direction to be adapted dynamically based on vehicle load conditions, ensuring regulatory compliance while maintaining a compact lens design that preserves the manufacturer's signature appearance.
Solution Approach 2:
The invention changes the inclination parameter of the luminous module by pivoting it around a longitudinal axis. This parameter adjustment allows the illumination beam to be directed at different angles without requiring a wider protective outer lens, thereby maintaining both regulatory compliance and aesthetic signature integrity.
2Device complexity
If the luminous module is pivoted about an axis close to the module to adjust beam inclination, then the adjustment mechanism is simple, but the beam may not remain centered on the main projection area of the screen
Solution Approach 1:
The patent introduces an intermediary optical element (such as a lens or reflector) positioned between the luminous module and the screen. This intermediary component helps maintain proper beam positioning and focus even when the luminous module is pivoted, ensuring that the beam remains centered on the main projection area while allowing for inclination adjustment.
Solution Approach 2:
The invention merges the inclination adjustment function with the beam positioning function by integrating the pivoting mechanism with optical elements that automatically keep the beam centered. This combination allows a single adjustment mechanism to achieve both inclination change and beam centering, simplifying the overall system while maintaining precision.
Data Source
AI summary
The present invention is a lighting device configured to project a light beam. The lighting device includes a light-emitting module configured to generate the light beam mainly along a longitudinal optical axis and a screen having a main region through which the light beam is projected. The lighting device includes a system for rotating the light-emitting module that is able to make the light-emitting module move from a first position to a second position about an axis of rotation. The axis of rotation of the light-emitting module is at distance from the light-emitting module, in a space bounded longitudinally by the screen and the light-emitting module.