Dual Beam Headlamp with Angled Planar LEDs and Parabolic Reflector
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing headlamp assemblies suffer from low optical efficiency and poor beam pattern distribution, leading to inefficient light projection and increased costs.
Innovation Solution
A dual beam headlamp assembly design featuring a housing with low and high beam light emitting devices, lenses, and a reflector, where the light emitting devices have planar surfaces oriented at specific angles to direct light along an optical axis, and a reflector with parabolic surfaces to maximize light projection in the forward direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional headlamp designs are used, then the structure is simple, but optical efficiency is low and light is lost to surroundings
Solution Approach 1:
The headlamp assembly is segmented into distinct functional zones: a reflector portion for redirecting light and a lens portion for focusing light. This segmentation allows each component to be optimized for its specific function, maximizing light direction efficiency while maintaining a manageable structural complexity through modular design.
2Illumination intensity
If light emitting devices are oriented at specific angles, then beam pattern distribution is improved, but manufacturing precision requirements increase
Solution Approach 1:
The reflector portion is designed with a curved reflecting surface rather than flat surfaces. This curvature is specifically shaped to redirect light from the LED package in multiple directions, achieving uniform beam pattern distribution while being more tolerant to manufacturing variations compared to precision flat surface orientations.
Solution Approach 2:
The lens portion utilizes refractive index parameters and curvature radii that are optimized to focus light from the LED package. By carefully selecting and tuning these optical parameters, the system achieves precise beam control and uniform illumination patterns while accommodating standard manufacturing tolerances.
3Productivity
If reflector surfaces are shaped by revolving parabolas, then light direction efficiency is maximized, but manufacturing complexity increases
Solution Approach 1:
The reflector portion employs a surface of revolution generated by revolving a parabola around its axis. This parabolic curvature is mathematically optimal for directing light parallel to the optical axis, maximizing light direction efficiency. The surface can be manufactured using rotational molding or CNC machining techniques that are relatively straightforward for rotational symmetry.
Solution Approach 2:
The single parabolic reflector surface serves multiple functions: it redirects light from the LED package, focuses light toward the optical axis, and works in conjunction with the lens portion to achieve both illumination and signaling functions. This multi-functionality reduces the need for additional separate components, simplifying overall manufacturing.
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 design enhances light projection efficiency by ensuring 100% of emitted light is directed forward, minimizing loss and improving beam pattern distribution, resulting in a more uniform and effective lighting pattern on the road surface.
Implementation Method 1
The reflector may be arranged in the housing to receive a remaining portion of the light emitted from the low beam and high beam light emitting devices and reflect the remaining portion of the light in the forward direction along the optical axis
Implementation Method 2
The low beam and high beam lens may be arranged in the housing to receive a portion of the light emitted from the low beam and high beam light emitting devices, respectively, and operable to direct the light in the forward direction along the optical axis
Data Source
AI summary
A headlamp assembly for projecting light in a forward direction along an optical axis is provided. The headlamp assembly may include a housing, a low beam light emitting device, a high beam light emitting device, a low beam lens, a high beam lens, and a reflector. The low beam and high beam light emitting devices may be arranged in the housing and include first and second planar surfaces, respectively, from which light is emitted. The normal to the first and second planar surfaces may be oriented away from the optical axis at substantially forty-five degrees in relation to the optical axis. The normal to the second planar surface may be oriented away from the normal to the first planar surface at substantially ninety degrees.