Dynamic LED Headlight Control for Energy Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LED headlight systems for motor vehicles consume excessive energy, particularly in low beam mode, due to the need for multiple LED arrays to achieve required illumination levels, which can strain the vehicle's electrical system and reduce range, especially in hybrid or electric vehicles.
Innovation Solution
A method to dynamically adjust the luminous flux and power of LED headlight modules based on driving situations, such as vehicle speed and environment, by selectively switching off or reducing power to specific LED arrangements, including the range module and side illumination, while ensuring compliance with legal light distribution requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LED arrays are operated together to achieve required illumination levels, then illumination quality is improved, but energy consumption increases
Solution Approach 1:
The patent applies dynamics by continuously adapting the luminous flux of individual LED arrays based on detected driving situations. The control device dynamically adjusts which LED arrays are active and their respective luminous flux levels, transitioning from static full-power operation to dynamic conditional operation, thereby reducing energy consumption while maintaining illumination quality when needed.
Solution Approach 2:
The patent implements local quality by enabling different LED arrays to have different operational states (fully on, partially on, or off) based on their specific contribution to illumination requirements in different driving situations. This allows selective optimization of each LED array's operation rather than uniform operation of all arrays, reducing overall energy consumption while maintaining necessary illumination in critical areas.
2Illumination intensity
If high power is consumed by the low beam, then illumination requirements are met, but the electrical system and energy store are strained
Solution Approach 1:
The patent applies parameter changes by continuously monitoring driving situation parameters (vehicle speed, acceleration, braking, steering angle) and adjusting the luminous flux parameters of individual LED arrays accordingly. This allows the system to operate at reduced power levels during situations where full illumination is not required, while still meeting illumination requirements when necessary, thereby reducing overall power consumption and strain on the electrical system.
3Length of moving object
If the range module is operated at full power, then the range of the low beam is increased, but energy consumption increases by around 23 watts
Solution Approach 1:
The patent applies dynamics to the range module by continuously adjusting its luminous flux based on detected driving situations. The control device determines when full range illumination is necessary versus when reduced illumination suffices, dynamically transitioning the range module's operation state to optimize the balance between beam range and energy consumption.
Solution Approach 2:
The patent implements partial action by operating the range module at reduced power levels during driving situations where full range illumination is not required. Instead of consistently providing maximum illumination, the system applies partial illumination sufficient for the current driving context, thereby reducing energy consumption by around 23 watts while maintaining adequate range when needed.
4Illumination intensity
If the vehicle is stationary with full low beam power, then maximum illumination is provided, but the vehicle electrical system for restarting the internal combustion engine is relieved
Solution Approach 1:
The patent applies parameter changes by detecting when the vehicle is stationary through monitoring driving situation parameters and adjusting the luminous flux of LED arrays accordingly. During stationary periods, the system reduces illumination power levels since full illumination is not required, thereby reducing electrical system load and preserving energy for critical functions such as restarting the internal combustion engine in start-stop vehicles.
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 approach reduces energy consumption by up to 50% without compromising safety, extending the range of electric vehicles and alleviating the electrical load on hybrid or conventional vehicles, while maintaining adequate illumination according to driving conditions.
Implementation Method 1
The light module can be designed as a reflection module comprising at least one light source for emitting light beams
Implementation Method 2
at least one primary optics, for example in the form of a reflector, for bundling the emitted light beams
Implementation Method 3
at least one secondary optics, e.g. in the form of a projection lens for imaging the bundled light beams on a roadway in front of the vehicle
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The method involves detecting driving conditions e.g. driving speed, of a motor vehicle, and adjusting a power output of an LED arrangement of a lighting device based on the driving conditions. The LED arrangement comprises LEDs (2, 3), a power supply for the LED arrangement and a control-or regulating unit. The LED arrangement is attached to the power supply. Obstacles are detected by an intelligent night vision device. The LED arrangement is switched on and off based on the driving conditions of the vehicle. An independent claim is also included for a control-or regulating unit for a lighting device of a motor vehicle.