Alternating Reflector Arrays for Compact Vehicle Lamp
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Solution Overview
Problem
Vehicle headlamps with separate reflector cavities for low-beam and high-beam functions become larger, increasing cost and reducing efficiency.
Innovation Solution
A vehicle lamp design featuring a single reflector with alternating arrays of reflective surfaces for low-beam and high-beam patterns, where the first array reflects light from an upper LED toward the front in a low-beam pattern and the second array reflects light from a lower LED toward the front in a high-beam pattern, allowing for compact size and improved light output without separate cavities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate reflector cavities are configured for low-beam and high-beam functions, then each beam function can be optimized independently, but the vehicle headlamp becomes considerably larger
Solution Approach 1:
The patent combines separate low-beam and high-beam reflector cavities into a single integrated reflector structure. The reflector contains both first reflective surfaces for low-beam patterns and second reflective surfaces for high-beam patterns within one unified optical system, eliminating the need for separate cavities while maintaining independent optimization of each beam function through strategically positioned reflective surfaces
Solution Approach 2:
The patent utilizes the vertical dimension within the reflector structure to differentiate between low-beam and high-beam functions. The first and second reflective surfaces are positioned at different vertical levels and orientations within the same reflector, allowing independent light pattern control without increasing horizontal footprint, thus reducing overall headlamp size while maintaining functional separation
2Reliability
If separate low-beam and high-beam reflector cavities are configured independently, then each cavity can be optimized for its specific function, but manufacturing cost increases
Solution Approach 1:
The patent merges separate reflector cavities into a single integrated reflector structure that contains both low-beam and high-beam reflective surfaces. This consolidation reduces the number of separate manufacturing processes, assembly steps, and aiming devices required, thereby lowering manufacturing costs while maintaining independent functional optimization through the integrated design
3Reliability
If separate low-beam and high-beam reflector cavities are configured independently, then each cavity can be optimized for its function, but device complexity increases
Solution Approach 1:
The patent integrates separate low-beam and high-beam reflector cavities into one unified reflector structure, reducing device complexity by eliminating redundant components such as separate aiming devices and multiple cavity structures. The integrated design maintains functional optimization through carefully positioned first and second reflective surfaces that independently control low-beam and high-beam patterns
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 minimizes the width of the reflector while providing enhanced light output for both beam patterns, complying with safety standards and reducing manufacturing costs by eliminating the need for separate cavities and aiming devices.
Implementation Method 1
A reflector has a first and second array of reflective surfaces. The first array of first reflective surfaces reflect light emitted from the upper LED toward a front of the headlamp in a low-beam pattern. The second array of second reflective surfaces reflecting light emitted from the lower LED toward the front of the headlamp in a high-beam pattern.
Data Source
AI summary
A vehicle lamp is provided with an upper light source and a lower light source spaced apart from the upper light source in a height direction. A reflector has a central optical axis extending a forward direction and oriented between the upper and lower light source. The reflector has first and second arrays of reflective surfaces. The first array of first reflective surfaces reflects light emitted from the upper light source in a first light pattern in the direction of the central optical axis. The second array of second reflective surfaces reflecting light emitted from the lower light source in a second light pattern in the direction of the central optical axis. At least one of the first reflective surfaces is oriented between two second reflective surfaces in the height direction.