Compact Vehicle Headlamp Integrating LED Projector and Reflector Units
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Solution Overview
Problem
Existing vehicle headlamps using discharge bulbs or halogen lamps face challenges in miniaturization due to the size requirements for reflectors to manage heat and light distribution, leading to increased overall volume when separate lamp units are used for different light distribution patterns.
Innovation Solution
A vehicle headlamp design incorporating both a projector-type and a reflection-type lamp unit, each using an LED as a light source, where the reflection-type unit is positioned beneath the projector-type unit, allowing for a compact configuration with shared components and improved heat management, and utilizing a one-piece structure for the reflector and coupling member to enhance light distribution efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate lamp units are used for different light distribution patterns, then light distribution versatility is improved, but the overall volume of the lamp increases
Solution Approach 1:
The patent combines the projector-type lamp unit and reflection-type lamp unit into a single integrated headlamp assembly, sharing common structural components such as the housing, heat dissipation mechanisms, and mounting structures. This merging approach enables multiple light distribution patterns to be achieved within a compact volume by selecting different lamp units as needed, rather than requiring separate complete lamp assemblies for each pattern.
2Area of stationary object
If a projector-type lamp unit is used, then the reflector diameter can be reduced, but the overall lamp volume increases due to separate unit configuration
Solution Approach 1:
The patent integrates the projector-type lamp unit with the reflection-type lamp unit in a shared housing structure, where the reflector and other components are common to both units. This allows the reflector diameter to be optimized for the projector-type configuration while avoiding the volume penalty of completely separate units, as the integration shares spatial footprint and structural elements.
3Volume of stationary object
If LED is used as light source, then the lamp can be miniaturized, but heat dissipation becomes more challenging in compact space
Solution Approach 1:
The patent combines both lamp units in a shared housing that includes common heat dissipation structures, such as heat sinks and ventilation pathways. This integrated approach allows efficient heat management for the compact LED-based design by sharing thermal management resources across both units, rather than requiring duplicate heat dissipation systems that would increase volume.
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 design enables the miniaturization of vehicle headlamps by effectively utilizing space and improving light distribution patterns while reducing the number of parts and enhancing heat dissipation, resulting in a more compact and efficient lighting solution.
Implementation Method 1
there is proposed a lamp which employs an LED (light emitting diode), for example, as a semiconductor light emitting element for a light source
Implementation Method 2
a light emitted from the light source is reflected toward the forward direction by the reflector
Implementation Method 3
The reflected light is irradiated in the forward direction of the lamp via a projection lens disposed on the forward side of the reflector
Data Source
AI summary
A vehicle headlamp including a projector-type lamp unit and a reflection-type lamp unit. The projector-type lamp unit includes a first light source, a first reflector, and a projection lens disposed in a forward direction of the first light source. The reflection-type lamp unit includes a second light source, and a second reflector. The reflection-type lamp unit is disposed beneath the projector-type lamp unit.