Vehicle Headlight Optical Axis Adjustment for Precise Light Images
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Solution Overview
Problem
Existing vehicle headlights require complex adjustments of the lens arrangement to the light source unit, leading to high manufacturing costs and potential material connection issues.
Innovation Solution
A distance adjustment device with a controllable actuating element, such as a magnetizable spring element, allows for simple adjustment of the light source unit relative to the lens arrangement by moving it along the optical axis, eliminating the need for complex bonding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens arrangement is adjusted by complex bonding processes to the light source unit, then the manufacturing precision of the light distribution is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
Instead of adjusting the lens arrangement relative to the light source unit through complex bonding processes, the patent inverts the approach by making the light source unit adjustable relative to the lens arrangement. The light source unit is mounted on a printed circuit board that can be positioned at different distances from the lens arrangement, simplifying the adjustment mechanism while achieving the same optical focusing effect
Solution Approach 2:
The patent introduces a dynamic adjustment mechanism where the light source unit can be repositioned along the optical axis relative to the lens arrangement. This is achieved through an adjustable mounting structure on the printed circuit board, allowing the system to adapt to different optical requirements without complex bonding processes
2Ease of manufacture
If the light source unit is fixed at a predetermined distance from the lens arrangement, then the manufacturing process is simplified, but the ability to adjust the light image is lost
Solution Approach 1:
The patent transforms the fixed distance arrangement into a dynamic one by providing an adjustable mounting structure for the light source unit on the printed circuit board. This allows the light source unit to be positioned at different distances from the lens arrangement while maintaining a simple overall structure, thus achieving both ease of manufacture and adjustability
Solution Approach 2:
The patent segments the mounting structure into adjustable components, specifically the printed circuit board assembly that can be independently positioned relative to the lens arrangement. This segmentation allows for simple assembly while enabling subsequent adjustment of the light image parameters
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 easy and cost-effective adjustment of the light image by allowing the light source unit to be positioned accurately relative to the lens arrangement, compensating for material tolerances and enabling adjustments even after installation.
Implementation Method 1
an actuator which is configured as a magnetic field generator, wherein the body extension of the spring element can be changed by means of a magnetic field generated by the magnetic field generator
Data Source
AI summary
The invention relates to a headlight with a light source unit and a lens arrangement which is arranged at a predetermined distance from the light source unit for generating a predetermined light image, with a printed circuit board to which the light source unit is electrically contacted, and with a holding device for holding the lens arrangement on a body which is firmly connected to the printed circuit board. A distance adjustment device includes an actuating element which moves in the direction of an optical axis and which engages the light source unit and the printed circuit board, an actuator which can be brought into operative interconnection with the actuating element for adjusting the same, and a control device for controlling the actuator such that the actuating element is moved by in the direction of the optical axis until the currently generated light image corresponds to a predetermined light image.