Vehicular Lamp Optical Axis Adjustment via Rotatable Light Source
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Solution Overview
Problem
Existing vehicular lamps struggle to precisely adjust optical axes without impairing the appearance, as rotating components can cause misalignment and affect the light distribution pattern.
Innovation Solution
A vehicular lamp design where the light source units are rotatable with respect to the bracket, while the light control members, such as projection lenses, are fixedly supported on the bracket, allowing for collective adjustment of optical axes without positional misalignment, and using a single transparent member for projection lenses to reduce component count and improve precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the projection lens and reflector of each lamp unit are made rotatable with respect to the bracket to correct misalignment of optical axes, then the optical axes can be precisely adjusted, but the positions of these components change which may impair the appearance of the vehicular lamp
Solution Approach 1:
The lamp unit is divided into two independently adjustable segments: the light source unit (with reflector) that can rotate on the bracket, and the projection lens that remains fixed. This segmentation allows optical axis correction through light source rotation while keeping the projection lens position constant, thus maintaining appearance while achieving precision adjustment
Solution Approach 2:
Instead of making the projection lens rotatable as in conventional designs, this invention inverts the approach by making the light source unit rotatable while keeping the projection lens fixed. This inversion resolves the contradiction by achieving optical axis adjustment through light source positioning rather than lens positioning, preventing appearance impairment
2Measurement precision
If multiple separate components (projection lenses and reflectors) are used in each lamp unit to allow independent adjustment, then optical axis alignment can be corrected, but the number of components increases which may complicate the structure
Solution Approach 1:
The projection lenses of multiple lamp units are merged into a single integrated projection lens component that is fixedly supported on the bracket. This merging reduces the number of separate components while maintaining the ability to achieve precise optical axis alignment through rotation of the light source units, thus simplifying the overall structure
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
Enables precise adjustment of optical axes for improved light distribution patterns without compromising the appearance of the lamp, reducing the number of components and maintaining structural integrity, while maintaining a sleek appearance.
Implementation Method 1
the light source unit is supported to be rotatable with respect to the bracket
Implementation Method 2
a light control member configured to control light from the light source unit
Implementation Method 3
a bracket supported to be rotatable with respect to a lamp body
Data Source
AI summary
Three lamp units are supported on a bracket supported to be rotatable with respect to a lamp body. In the configuration of the respective lamp units, light source units are supported to be rotatable in an up and down direction with respect to the bracket, and projection lenses are fixedly supported on the bracket. Accordingly, it is possible to correct a misalignment of optical axes among the lamp units by preventing the occurrence of the positional misalignment of the projection lenses among the lamp units and then rotating the respective light source units with respect to the bracket.