Vehicle Headlamp Dust-Tight Air Gap for Matrix Lighting
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Solution Overview
Problem
The implementation of matrix light or adaptive high beam in vehicle headlights faces challenges due to contamination risks during assembly and operation, leading to imaging errors and reduced illumination performance, which increases the complexity and cost of maintaining cleanliness and component quality.
Innovation Solution
A vehicle headlight design featuring a lighting lens with a transparent lens body and a lighting assembly that includes a carrier with independently controllable pixels, where an air gap between the lighting matrix and the light entrance surface is sealed dust-tight but not air-tight, using a particle filter to prevent dust contamination while allowing air passage, thereby maintaining high accuracy and reducing contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the light source is positioned close to the lens to achieve compact design, then the headlight structure is more compact, but the risk of contamination increases
Solution Approach 1:
The headlight is divided into separate functional modules: a lighting module containing the light source and a lens module containing the lens assembly. This segmentation allows each module to be optimized independently and assembled with controlled contamination risk.
Solution Approach 2:
A carrier component is introduced as an intermediary between the light source and the lens. This carrier provides a mounting structure that maintains precise positioning while creating a controlled interface that minimizes contamination pathways.
2Measurement precision
If adjustable mounting is used to achieve high alignment accuracy, then imaging precision is improved, but assembly complexity and cost increase
Solution Approach 1:
The carrier is pre-designed with integrated positioning features and mounting structures that establish precise alignment during the manufacturing process. This preliminary action eliminates the need for complex adjustable mounting mechanisms during final assembly.
Solution Approach 2:
The mounting function and positioning function are merged into the carrier component. The carrier simultaneously provides mechanical support, precise positioning, and alignment reference features, reducing the number of separate adjustment mechanisms needed.
3Object-affected harmful factors
If the installation space is sealed completely to prevent contamination, then cleanliness is improved, but heat dissipation and air flow are restricted
Solution Approach 1:
The sealing arrangement provides localized dust-tight sealing at the interface between the carrier and lens housing, while leaving other areas open for heat dissipation. This selective sealing approach prevents contamination without restricting thermal management.
Solution Approach 2:
The sealing arrangement uses a mesh structure that acts as a physical barrier to dust particles while allowing air molecules to pass through freely. This porous configuration enables simultaneous contamination prevention and heat dissipation.
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
This design enhances the imaging quality and reduces the effort and cost associated with maintaining the headlight's cleanliness and component quality, ensuring consistent and efficient illumination performance.
Implementation Method 1
an air gap is provided which is sealed dust-tight but not air-tight with respect to the environment of the lighting lens
Data Source
AI summary
The disclosure relates, inter alia, to a motor vehicle (1) having a vehicle headlight (10) which comprises a lighting lens (46), the lighting lens (46) comprising a lens body (460) made of transparent material with at least one light entrance surface (462) and at least one light exit surface, wherein the lighting lens (46) further comprises a lighting assembly (461) which comprises a carrier (4612) on which is arranged a lighting matrix (4611) with a plurality of independently controllable lighting pixels, wherein by means of the lighting matrix (4611) light can be irradiated into the light entrance surface (462) of the lens body (460), which light exits from the light exit surface of the lens body (460), wherein between the lighting matrix (4611) and the light entrance surface (462) an air gap (464) is provided which is sealed dust-tight but not air-tight with respect to the surroundings of the lighting lens (46).