Matrix LED Headlamp With Position-Based Luminance Control
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Solution Overview
Problem
LED headlights in motor vehicles are mechanically fixed, limiting their ability to adjust light distribution and influencing driver gaze behavior, such as in predictive cornering lights, and existing technologies do not effectively manage light intensity and spectral composition for communication or adaptive illumination.
Innovation Solution
A headlight system with a matrix arrangement of light sources, where luminance can be individually set and adjusted based on position using a predetermined distribution function, allowing for flexible control of light segments and adaptive illumination based on driving conditions and sensor data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If LED headlights are mechanically fixed to the vehicle, then structural stability is improved, but the ability to adjust light distribution and influence driver gaze behavior deteriorates
Solution Approach 1:
The headlight is divided into multiple independently controllable segments or zones, each with adjustable luminance. This allows different portions of the headlight to be controlled separately to achieve predictive cornering effects and adapt to road geometry without requiring mechanical movement of the entire headlight assembly.
Solution Approach 2:
Different segments of the headlight are assigned different luminance characteristics based on their position and function. Central segments may have higher luminance for main illumination while peripheral segments are adjusted for cornering or glare reduction, creating localized light quality variations that guide driver attention and improve safety.
2Adaptability or versatility
If individual light sources are controlled separately with different luminance values, then adaptability of illumination is improved, but device complexity increases
Solution Approach 1:
The control system dynamically adjusts luminance values of individual light sources based on real-time driving conditions, road geometry, and detected objects. This dynamic control enables adaptive illumination that responds to changing environmental conditions without requiring complex mechanical reconfiguration.
Solution Approach 2:
The system uses feedback from sensors, cameras, and vehicle dynamics data to automatically adjust the luminance distribution across light sources. This closed-loop control simplifies the user interface while maintaining high adaptability, as the system self-regulates based on environmental feedback rather than requiring manual configuration.
3Use of energy by moving object
If luminance values are adjusted based on position following distribution functions, then energy efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The system changes the luminance parameter of light sources based on their positional coordinates according to predetermined distribution functions. This software-based parameter adjustment compensates for manufacturing tolerances in light source positioning, allowing precise light distribution control without requiring extremely tight manufacturing tolerances for LED placement.
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
Enables precise adjustment of light distribution for improved road illumination, obstacle detection, and reduced glare for oncoming vehicles, enhancing driver safety and comfort by optimizing energy usage and light beam alignment with the road and vehicle dynamics.
Implementation Method 1
Headlamps with light-emitting diodes (LEDs) are increasingly being used in modern motor vehicles
Data Source
Figure 1~2
Figure 3~4
AI summary
The headlight (10) has multiple light sources, where the lighting sources are arranged in a matrix with two perpendicular directions of extension (18,20). A value of the luminance is adjusted individually for each of the lamps. The value of the luminance of the light source is adjustable depending on a position of the light source along one of the directions of extension of a given distribution function (24) that is a normal discretised distribution. Independent claims are included for the following: (1) a motor vehicle with an assistance system; and (2) a method for operating a headlight.