Adaptive Beam Scanning Headlamp with Oscillating Mirror
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Solution Overview
Problem
Existing vehicle headlamps struggle to adaptively control light beam patterns to reduce glare for oncoming vehicles and pedestrians, as they lack efficient mechanisms for dynamically adjusting light intensity and distribution.
Innovation Solution
An adaptive beam scanning headlamp system featuring a light source, primary and secondary projection lenses, and an oscillating mirror, where the oscillating mirror is obliquely angled between the lenses to redirect light, and a controller actively dims or turns off LEDs to shape a desired beam pattern, reducing glare by modulating light output based on real-time imaging and location data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional headlamps use fixed beam patterns, then the structure is simple and reliable, but they cannot adaptively reduce glare for oncoming vehicles and pedestrians
Solution Approach 1:
The patent applies the dynamics principle by implementing a movable oscillating mirror that can dynamically change its angular position to redirect light beams. The mirror oscillates between different angles under controller direction, enabling the headlamp to adaptively adjust beam patterns in real-time based on detected positions of other vehicles or pedestrians, thus resolving the contradiction between adaptability and complexity by introducing controlled motion rather than static multiple components
Solution Approach 2:
The patent applies segmentation by dividing the light source into multiple independently controllable LEDs arranged in arrays. The controller can selectively activate or dim individual LEDs or groups of LEDs to create different beam patterns. This segmentation allows the system to achieve complex adaptive lighting functions while maintaining a relatively simple overall structure, as each LED module can be controlled independently to achieve various illumination patterns
2Illumination intensity
If headlamps increase light intensity for better visibility, then illumination improves, but glare to other vehicles and pedestrians increases
Solution Approach 1:
The patent applies local quality by enabling the controller to selectively activate or dim specific LEDs or LED groups based on the detected position of other vehicles or pedestrians. When an obstacle is detected, the controller adjusts the illumination intensity of only the relevant LED segments that would cause glare to that specific location, while maintaining full intensity in other areas where no obstacles are present. This localized control resolves the contradiction by applying different illumination qualities to different spatial regions
Solution Approach 2:
The patent implements feedback through the use of imaging devices (cameras or sensors) that continuously detect the positions of other vehicles, pedestrians, or obstacles. The controller receives this visual feedback and uses it to dynamically adjust the beam pattern and intensity of the LEDs in real-time. This closed-loop feedback system allows the headlamp to automatically reduce glare to detected objects while maintaining illumination in safe areas, resolving the contradiction between visibility and glare reduction
3Measurement precision
If headlamps use multiple independently controllable LEDs for adaptive patterns, then beam control precision improves, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies segmentation by organizing LEDs into modular arrays or groups that can be controlled independently. Rather than requiring completely individual control of every LED, the system divides the LED array into segments or zones that can be activated or dimmed as groups. This segmentation maintains sufficient beam pattern control precision for practical applications while reducing the complexity of the control system and manufacturing requirements compared to fully individual LED control
Solution Approach 2:
The patent applies universality by designing the oscillating mirror and LED array system to perform multiple functions: it can create different beam patterns (high beam, low beam, selective masking), detect obstacles through integrated imaging devices, and adapt to various driving conditions. This multi-functionality reduces the need for separate dedicated components for each function, thereby controlling overall device complexity while achieving precise beam pattern control through the coordinated operation of the universal system components
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
The system effectively projects a controlled light pattern that minimizes glare for other vehicles and pedestrians by dynamically adjusting the beam pattern in real-time, enhancing safety and reducing light intensity where necessary.
Implementation Method 1
An oscillating mirror is obliquely angled between the primary projection lens and a secondary projection lens to receive light from the primary projection lens and redirect the light to the secondary projection lens
Data Source
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AI summary
An adaptive beam scanning headlamp for a vehicle includes a plurality of light sources arranged linearly, with each of the plurality of light sources having a linear array of LEDs. A plurality of primary projection lenses shape light from the plurality of light sources. An oscillating mirror obliquely angled between the plurality of primary projection lenses and a secondary projection lens receives light from the plurality of primary projection lenses and redirects the light to the secondary projection lens. The secondary projection lens is adapted to further shape the light for projecting a beam pattern from the vehicle. A controller is adapted for controlling each of the plurality of light sources and the oscillating mirror to actively dim or turn off portions of the beam pattern for reducing glare perceived outside the vehicle.