Vehicle Headlamp Module Shielding Layout for Short-Circuit Prevention
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Solution Overview
Problem
Existing vehicle headlight modules face challenges in achieving a space-saving design while maintaining high operational reliability due to the risk of electrical short circuits from mechanical vibrations and positional inaccuracies, which require a buffer distance from conductive housing for electromagnetic shielding.
Innovation Solution
The implementation of hardened, electrically non-conductive adhesive points on the contact-sensitive surface section of the circuit arrangement to maintain a minimum distance from the conductive housing, preventing surface contact and ensuring operational reliability even when positioned closely to the shielding surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the circuit arrangement is positioned close to the conductive housing for electromagnetic shielding, then space is saved, but the risk of electrical short circuits increases due to mechanical vibrations and positional inaccuracies
Solution Approach 1:
The patent introduces adhesive points as intermediary elements between the circuit arrangement and the conductive housing. These adhesive points serve as spacers that maintain a defined distance, preventing direct contact while allowing the circuit arrangement to be positioned close to the housing for space-saving purposes. The adhesive points transfer mechanical loads away from the electrical contacts, ensuring reliability even under vibration and shock conditions.
2Reliability
If an insulating varnish layer is applied to prevent short circuits, then electrical reliability is improved, but the layer can be abraded by mechanical vibrations and shocks
Solution Approach 1:
The patent applies beforehand cushioning by positioning the circuit arrangement at a predetermined safe distance from the conductive housing using adhesive points. This pre-established spacing cushion prevents mechanical contact between electrical contacts and the conductive housing, protecting against abrasion of insulating layers that would occur under vibration and shock conditions.
3Reliability
If a buffer distance is designed into the module, then operational reliability is maintained, but the module size increases
Solution Approach 1:
The patent applies local quality by creating localized spacing only at critical areas where electrical contacts are present. The adhesive points are positioned specifically at locations where electrical conductors run close to the conductive housing, providing targeted protection without requiring a uniform buffer distance across the entire module. This allows compact overall dimensions while maintaining reliability at critical interfaces.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a vehicle headlight module (1) comprising an electrical circuit arrangement (2) for controlling at least one function of a vehicle headlight (3), and a housing (4) for at least partially accommodating the electrical circuit arrangement (2), wherein the housing (4) has at least a section of a metallic, electrically conductive shielding surface (4a) facing the circuit arrangement (2) for electromagnetic shielding of the circuit arrangement (2), wherein the electrical circuit arrangement (2) has at least one largely planar contact-sensitive surface section (2a), wherein this contact-sensitive surface section (2a) is free of electrical components (5a) arranged thereon and faces a planar section (4a') of the shielding surface (4a) of the housing (4), wherein electrical conductors (6a) and/or contacts (6b) extend along the contact-sensitive surface section (2a).wherein a number of cured, electrically non-conductive adhesive points (7) are arranged on the largely flat contact-sensitive surface section (2a), which project from the contact-sensitive surface section (2a) in the direction of the flat section (4a') of the shielding surface (4a) of the housing (4) to ensure a minimum distance between the contact-sensitive surface section (2a) and the flat section (4a') of the shielding surface (4a) of the housing (4).