Vehicle Headlight Controller Using Electronic Light Distribution
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Solution Overview
Problem
Conventional vehicle headlight systems with adaptive driving beams and adaptive front-lighting systems are complex, unreliable, and prone to emitting glare, especially on curved roads and when oncoming vehicles approach, limiting their use and design flexibility due to movable parts.
Innovation Solution
A headlight controller system with a camera, vehicle detector, and light-emitting area controller that adjusts light distribution patterns and intensity based on traffic conditions, using optical units without movable parts to prevent glare and enhance visibility, allowing for simpler and more reliable headlight designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotatable shutter is used to adjust light distribution patterns, then the headlight can adapt to various traffic conditions, but the structure becomes complex and reliability decreases
Solution Approach 1:
The patent replaces the mechanical rotatable shutter system with a semiconductor light-emitting device array that can be electronically controlled to produce different light distribution patterns. This substitution eliminates moving parts and mechanical complexity while maintaining the ability to adapt light distribution to various traffic conditions through electronic control of individual LED elements.
Solution Approach 2:
The headlight is divided into multiple independently controllable light-emitting elements (first and second light-emitting devices with different light-emitting surfaces). Each element can be controlled separately to create various light distribution patterns, replacing the need for a single complex movable shutter system.
2Object-affected harmful factors
If a rotatable shutter is used to block light, then glare can be prevented for oncoming vehicles, but the device complexity increases
Solution Approach 1:
The patent replaces the mechanical shutter system with electronically controllable light-emitting elements that can be selectively activated or deactivated. This allows glare prevention through electronic control rather than mechanical blocking, eliminating the need for complex shutter mechanisms while achieving the same safety objective.
Solution Approach 2:
Different regions of the light-emitting array are controlled independently to provide appropriate light distribution for different directions. The first light-emitting device provides light for one direction while the second light-emitting device provides light for another direction, allowing selective illumination that prevents glare to oncoming vehicles while maintaining visibility for the driver.
3Illumination intensity
If adaptive front-lighting system with movable parts is used, then visibility can be improved, but reliability decreases
Solution Approach 1:
The patent replaces movable mechanical components with a fixed array of semiconductor light-emitting devices that are electronically controlled to achieve adaptive lighting. This substitution eliminates mechanical failure points while maintaining the ability to adjust light distribution patterns for improved visibility in various driving conditions.
Solution Approach 2:
Instead of using a single light source with movable components to adjust direction, the patent uses multiple fixed light sources that can be independently controlled. This inverts the traditional approach by making the light sources adjustable through electronic selection rather than through mechanical movement, thereby improving reliability.
4Adaptability or versatility
If conventional headlight system with movable parts is used, then design flexibility is limited, but the structure becomes simpler
Solution Approach 1:
The headlight is segmented into multiple independently controllable light-emitting elements arranged in specific patterns. This segmentation allows for flexible light distribution patterns and adaptive lighting functions while using simple, fixed structural components, thereby achieving design flexibility without increasing mechanical complexity.
Data Source
AI summary
A headlight controller and a vehicle headlight system including an ADB and AFS can include a headlight controller and an optical unit. The headlight controller can include a system controller and a camera photographing vehicles located in a travelling direction of a subject vehicle, and the system controller can be configured to output a control signal to provide favorable light distribution patterns by using image data output from the camera in accordance with traffic conditions. The optical unit can be configured to emit beam lights using lights emitted from a first and second light-emitting device via a projector lens so that the beam lights can be used as a high/low beam without movable parts. Thus, the disclosed subject matter can include providing vehicle headlight systems that can form various favorable light distribution patterns by utilizing the characteristics of the controller and the optical unit in accordance with the traffic conditions.