Variable Aperture Diaphragm for High-Resolution Headlamp
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Solution Overview
Problem
Existing illumination devices for motor vehicles cannot simultaneously achieve high maximum illumination intensity and high imaging quality, depending on the application, whether for adaptive glare-free high beams or symbol projections.
Innovation Solution
Incorporation of a variable aperture diaphragm, such as an iris diaphragm, which can be adjusted by an electric motor to optimize light distribution based on the application, allowing for maximum illumination intensity in high beam mode and high imaging quality in symbol projection mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture diaphragm opening width is increased to achieve high maximum illumination intensity, then the illumination intensity improves, but the imaging quality deteriorates
Solution Approach 1:
The patent implements a variable aperture diaphragm with adjustable opening width that can dynamically change between different aperture sizes. This dynamic adjustment capability allows the system to optimize between illumination intensity and imaging quality based on the specific application requirement, resolving the contradiction by making the aperture size adaptive rather than fixed
Solution Approach 2:
The patent changes the physical parameter of aperture opening width to achieve different performance characteristics. By varying this parameter, the system can switch between high illumination intensity mode (larger opening) and high imaging quality mode (smaller opening), effectively managing the trade-off between these two competing requirements
2Manufacturing precision
If the aperture diaphragm opening width is decreased to achieve high imaging quality, then the imaging quality improves, but the maximum illumination intensity deteriorates
Solution Approach 1:
The variable aperture diaphragm enables dynamic adjustment of the opening width to smaller sizes when high imaging quality is required. This dynamic capability allows the system to optimize for projection quality in symbol projection applications while maintaining the ability to switch to larger apertures when illumination intensity becomes the priority
Solution Approach 2:
The system utilizes parameter changes in aperture opening width to achieve optimal imaging quality. By reducing the aperture size, diffraction effects are minimized and projection sharpness is improved, directly addressing the imaging quality requirement while the system retains the flexibility to change this parameter when needed
3Device complexity
If a fixed aperture design is used, then the device complexity is reduced, but the adaptability to different applications deteriorates
Solution Approach 1:
The patent introduces a dynamically adjustable aperture diaphragm that can change its opening width based on application requirements. This dynamic feature enhances adaptability across different use cases (high beam versus symbol projection) while the overall structural design remains relatively simple, maintaining a reasonable balance between complexity and versatility
Solution Approach 2:
The variable aperture diaphragm enables the illumination device to perform multiple functions effectively - both high-intensity illumination and high-quality symbol projection. This single adjustable component provides multi-functionality, allowing the device to adapt to different applications without requiring separate specialized systems for each function
Data Source
AI summary
An illumination device for a motor vehicle, in particular a high-resolution headlamp, comprising an imaging component with an active surface at which imaging elements are arranged in the manner of a matrix for the specific creation of pixels of a light distribution, projection optics by means of which the light coming from the active surface is projected into the space outside the motor vehicle in operation of the illumination device, wherein the illumination device has an aperture diaphragm with a variable opening width through which at least part of the light coming from the active surface can pass in operation of the illumination device.