Motor Vehicle Headlamp Signlight Using Dimmable Additional Lighting
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Solution Overview
Problem
Existing motor vehicle headlight systems face challenges in generating signlight, a light distribution required for illuminating overhead objects, as current solutions are either visually unappealing due to visible optics or complex and not universally applicable.
Innovation Solution
A lighting device with an additional light source system that can be dimmed or switched off to adjust light intensity in specific areas, allowing for the generation of signlight while meeting regulatory requirements without compromising design aesthetics or optical system functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If special optics such as facets on projection lens are used to generate signlight, then the required light intensity values for signlight are achieved, but the optics become visible from outside which is undesirable for design reasons
Solution Approach 1:
The headlight system is divided into separate functional modules: a basic light distribution device and an additional light distribution device. The additional device contains multiple independently controllable light sources that can be selectively activated to generate signlight without requiring visible optical structures on the projection lens surface.
Solution Approach 2:
The patent controls the luminous intensity parameters of individual light sources within the additional light distribution device by independently adjusting their activation states. This allows precise control of signlight intensity values without changing the physical structure or visibility of optical elements.
2Illumination intensity
If discreet small elevations are used to generate signlight, then the light intensity requirements are met, but these structures are perceived as bright points of light which is rejected for design reasons
Solution Approach 1:
The additional light distribution device is segmented into multiple individually controllable light sources. By selectively activating specific sources and controlling their intensity, the system generates signlight without creating unwanted bright point perceptions, as the light is distributed across multiple controlled emission points rather than concentrated elevations.
Solution Approach 2:
The patent dynamically adjusts the luminous intensity parameters of individual light sources based on operational requirements. This allows the system to meet signlight intensity requirements while maintaining aesthetic appearance by controlling which light sources are active and at what intensity levels.
3Illumination intensity
If specially shaped collimator optics are used to generate signlight, then the basic light distribution and signlight are generated, but the collimators become complex and cannot be used universally for any lighting module concept
Solution Approach 1:
The lighting system is segmented into separate functional devices: a basic light distribution device for general illumination and an additional light distribution device for signlight. This eliminates the need for complex specially shaped collimator optics within a single system, as each device can use simpler, more universal optical components optimized for its specific function.
Solution Approach 2:
The additional light distribution device with independently controllable light sources provides a universal solution that can be integrated with different basic light distribution devices and lighting module concepts. This modular approach replaces the need for complex, non-universal specially shaped collimators with a flexible, adaptable system.
4Illumination intensity
If high beam distribution is generated by activating both basic and additional light illumination devices, then the required light intensity is achieved, but glare may increase
Solution Approach 1:
The patent applies different control strategies to different regions of the light distribution. The additional light distribution device targets specific areas (signlight regions) with elevated light sources, while the basic light distribution device provides general illumination. This localized approach ensures high beam intensity where needed while minimizing glare in other areas through precise spatial control of light emission.
Solution Approach 2:
The system dynamically adjusts which light sources are activated and at what intensity levels based on operational requirements. During high beam operation, the control device coordinates activation of both basic and additional light distribution devices, but can independently modulate their output to achieve the required intensity balance between illumination and glare reduction.
Data Source
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AI summary
The invention relates to a lighting device (1) for a motor vehicle headlight or for a motor vehicle, wherein the lighting device (1) comprises a basic light lighting device (2) for generating a basic light distribution and an additional light lighting device (3) which is configured to generate an additional light distribution, and wherein the lighting device (1) can be operated in a first operating state in which the basic light lighting device (2) and the additional light lighting device (3) together form a high beam distribution, and wherein the lighting device (1) can be operated in a second operating state in which the basic light lighting device (2) is activated to generate the basic light distribution, wherein in the second operating state the additional light lighting device (3) is operated dimmed compared to the first operating state.