Multi-pixel Vehicle Headlamp with Segmented Paraboloidal Reflectors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current multi-pixel high beam systems, particularly reflective systems, cannot independently adjust the width of each pixel to meet specific illumination requirements, such as forming high resolution near the vehicle and low resolution on the sides, due to the fixed focal point and mirror configuration, leading to inadequate light distribution and increased costs in projection systems.
Innovation Solution
A multi-pixel high beam system utilizing a multi-cavity reflector with paraboloidal reflection surfaces and separate focal points for each light-emitting source, combined with a first and second reflector, allows for adjustable pixel widths by setting the widths of individual light collimation units, enabling flexible light spot formation and assembly without the need for additional lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reflecting mirror is used for multiple LED light sources, then the system structure is simplified and cost is reduced, but the pixel widths cannot be independently adjusted and are basically the same
Solution Approach 1:
The single reflecting mirror is divided into multiple reflecting mirror units, each corresponding to one LED light source. This segmentation allows each mirror unit to independently control the light reflection for its corresponding LED, enabling independent adjustment of pixel widths while maintaining a relatively simple overall structure without requiring additional lenses or complex optical systems.
Solution Approach 2:
Each reflecting mirror unit is designed with specific local optical properties tailored to its corresponding LED light source. The reflecting mirror units can have different focal lengths, curvature radii, or reflection angles optimized for individual LEDs, allowing each pixel to have its desired width characteristics while the overall system remains structurally simple.
2Ease of manufacture
If the focal point of the reflecting mirror is set on the middle LED light source, then all LED light sources can share the same mirror, but the widths of individual pixels formed are basically the same and cannot be changed individually
Solution Approach 1:
The unified reflecting mirror is segmented into multiple independent reflecting mirror units, each with its own focal point optimization. This allows each unit to be manufactured with specific precision requirements for its corresponding pixel, while the overall manufacturing process remains simpler than creating entirely separate optical systems for each LED.
Solution Approach 2:
The reflecting mirror units can be designed with adjustable parameters such as movable mounting positions or adjustable curvature, allowing the focal characteristics of each unit to be dynamically optimized for different pixel width requirements while maintaining the shared mirror structure benefit.
3Manufacturing precision
If projection elements such as lenses are added to achieve multi-pixel high beam, then pixel width control is improved, but the cost is much higher than the reflective system
Solution Approach 1:
The patent replaces the traditional lens-based optical system with a reflecting mirror unit system. By using reflection instead of refraction through lenses, the system achieves comparable or superior pixel width control precision while eliminating the need for expensive optical lenses, thereby reducing overall system cost while maintaining manufacturing precision.
Solution Approach 2:
The patent controls pixel width by changing the parameters of the reflecting mirror units (such as focal length, curvature radius, reflection angle) rather than using different lens configurations. This parameter adjustment approach achieves precise pixel width control while using cost-effective reflective optics instead of expensive transmissive lenses.
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 configuration allows for a high beam light shape with specific pixel widths that can be adjusted according to driving conditions, enhancing illumination uniformity and safety while reducing system complexity and cost.
Implementation Method 1
a light collimation element and at least one reflective element which cooperate with the light-emitting light sources, wherein the light collimation element is provided with a plurality of light collimation units arranged in parallel and having set widths, the light emitted from the light-emitting light source is converged by the light collimation element
Implementation Method 2
the light emitted from the light-emitting light source is reflected by the reflecting mirror
Implementation Method 3
the light emitted from the light-emitting light source is reflected by the reflecting mirror, and then form a high beam light shape with a certain width corresponding to the size of the light-emitting chip
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A vehicle lamp, comprising a multi-pixel high beam system comprising a plurality of light-emitting light sources (1), a light condensing element matching the light-emitting light sources (1), and at least one reflective element. The light condensing element forms a plurality of light condensing units arranged in parallel and having a set width. The light-emitting light sources (1) have one-to-one correspondence to the light condensing units, so that light emitted by the light-emitting light sources (1) is converged by the light condensing element, and then reflected by the reflective element to form a plurality of light spots. The plurality of light spots are sequentially arranged to form a plurality of light shapes having a plurality of pixels, and the width of the light spots corresponds to the set width of each light condensing unit. A high beam light shape (a) having a plurality of pixels of the specific widths can be formed, and the width of each pixel can be independently set according to the actual condition on a vehicle driving road, thereby meeting the multi-pixel intelligent illumination requirements.