Vehicle Headlight Circuit Assembly Common Negative Terminal
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Solution Overview
Problem
The existing circuit arrangements for vehicle headlight light units require a large number of line connections and plug-in contacts between the light unit and the control unit, leading to increased construction space and complexity due to separate connections for negative terminals, cathodes, and equipotential bonding contacts.
Innovation Solution
The cathode, negative terminal, and equipotential bonding contact are electrically connected within the light unit, reducing the number of line connections by merging these components on a common circuit board, with the equipotential bonding contact connected to the power supply ground, allowing for temperature measurement without interference from the semiconductor light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the negative terminals and cathodes are led out as separate contacts, then each component can be independently connected to the control unit, but the number of line connections and plug-in contacts increases significantly
Solution Approach 1:
The patent combines the negative terminal of the temperature measurer, the cathode of the semiconductor light source, and the equipotential bonding contact into a single common negative terminal structure. This merging reduces the number of separate line connections from three to one, while maintaining reliable electrical connections for all components through the shared negative terminal and common ground connection.
2Reliability
If separate line connections are used for each component, then each component has dedicated wiring, but the construction space and housing size increase
Solution Approach 1:
The patent merges multiple wiring paths into a single common negative terminal structure that accommodates the temperature measurer, semiconductor light source, and equipotential bonding contact. This consolidation significantly reduces the space required for wiring channels, terminal blocks, and associated mounting structures within the headlight housing, allowing for a more compact overall design.
3Adaptability or versatility
If multiple plug-in contacts are used between light unit and control unit, then all components can be connected, but the number of contacts and connection points increases
Solution Approach 1:
The patent consolidates three separate plug-in contacts (negative terminal of temperature measurer, cathode of semiconductor light source, and equipotential bonding contact) into a single common negative terminal connection point. This merging maintains the ability to connect all components to the control unit while reducing the number of plug-in contacts from three to one, simplifying the connector design and assembly process.
Data Source
AI summary
A circuit arrangement for the electrical wiring of a light unit of a headlight for a vehicle, having a control unit which is connected to a power supply, the light unit having at least one semiconductor light source and a temperature measurer, wherein the semiconductor light source has a cathode and wherein the temperature measurer has a cathode, and wherein the light unit has an equipotential bonding contact. In the light unit, the cathodes are electrically connected to one another and/or at least one of the cathodes is electrically connected to the equipotential bonding contact in the light unit.