Vehicle Lamp Lens Layout for Radar Heat Isolation
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Solution Overview
Problem
Radar devices disposed near vehicle headlights are affected by heat generated by the light source, leading to potential failure and affecting the safety and reliability of autonomous driving systems.
Innovation Solution
A lighting device design that separates the monitoring device, such as radar, from the light source by positioning it outside the lamp chamber and behind an opaque portion of the lens, with a sealing mechanism to maintain separation and protect against heat, dirt, and dust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the monitoring device is disposed in the same space as the light source, then the device structure is compact and space is saved, but the monitoring device is affected by heat generated by the light source causing failure
Solution Approach 1:
The patent divides the internal space of the lens portion into two separate chambers: a lamp chamber for the light source and a monitoring device chamber for the monitoring device. The sealing portion acts as a partition wall between these chambers, physically separating the heat-generating light source from the heat-sensitive monitoring device while maintaining overall compactness.
Solution Approach 2:
The monitoring device is extracted from the common space and placed in a dedicated monitoring device chamber that is sealed off from the lamp chamber. This extraction removes the monitoring device from the harmful thermal environment while keeping it within the same overall housing structure.
2Reliability
If the monitoring device is disposed outside the lamp chamber, then the monitoring device is protected from heat, but the device structure becomes more complex
Solution Approach 1:
The lens portion serves multiple functions: it acts as the outer housing for both chambers, provides the sealing portion to separate the chambers, and contains the mounting structures for both the light source and monitoring device. This multi-functionality reduces overall structural complexity despite the internal separation.
Solution Approach 2:
The monitoring device chamber is nested within the lens portion, and the lamp chamber is also nested within the lens portion. Both chambers are contained within the single lens portion housing, creating a nested structure that minimizes external complexity while providing internal separation.
3Reliability
If the monitoring device is disposed at the back surface of the lens portion, then the monitoring device is isolated from heat and environmental contaminants, but the installation position is more restricted
Solution Approach 1:
The lens portion is pre-designed with an integrated monitoring device chamber and sealing structures during manufacturing. The mounting structures for the monitoring device are built into the lens portion itself, allowing for straightforward installation at the predetermined back surface location without requiring additional complex assembly steps.
Data Source
AI summary
The invention provides a lighting device for a vehicle for which a monitoring device and a light source may be disposed in a same space without being affected by heat and causing failure. The lighting device for the vehicle includes a housing accommodating the light source; and a lens portion covering the housing from an outside of the vehicle to be combined with the housing and forming a lamp chamber surrounded by a sealing portion, wherein the light source is disposed in the lamp chamber, and the monitoring device is disposed at an outside of the lamp chamber and at a position of a back surface of the lens portion.