Vehicle Lamp Inter-Light Source Reflector Shadow Reduction
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Solution Overview
Problem
Existing vehicle headlamps with multiple LEDs in parallel arrangements face issues with light distribution shadows due to lattice-like guide elements, leading to inefficient light utilization and increased lamp size.
Innovation Solution
The use of inter-light source reflectors and a shade with concave reflective surfaces to direct and reflect light from LEDs, allowing for effective light utilization without increasing the lamp's size, by sandwiching LEDs and creating gaps for parallel light to pass through, thus minimizing shadow formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a lattice-like guide element is provided surrounding each LED, then light distribution control is improved, but shadow formation occurs in the light distribution due to shielding by the guide element
Solution Approach 1:
An inter-light source reflector is introduced as an intermediary component between adjacent light sources. This reflector mediates the light paths by reflecting light from one LED toward the projection lens, preventing the guide element from completely blocking the light. The reflector acts as a mediator that allows light to bypass the shielding effect of the guide element while maintaining controlled light distribution.
2Use of energy by moving object
If the first reflector and second reflector are increased in size to cause light to effectively enter the projection lens, then light utilization is improved, but the size of the lamp is increased
Solution Approach 1:
The reflection function is segmented into multiple components: the first reflector, the second reflector, and the inter-light source reflector. By dividing the reflection task among these segments, the patent achieves effective light utilization without requiring each individual reflector to be large. The inter-light source reflector specifically handles light between adjacent LEDs, allowing the overall lamp size to remain compact while maintaining high light efficiency.
Solution Approach 2:
The inter-light source reflector utilizes the spatial dimension between adjacent light sources to redirect light. By positioning the reflector in the inter-light source region and utilizing oblique reflection, the system effectively uses the three-dimensional space within the compact lamp structure to improve light utilization without increasing the overall footprint of the lamp.
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 enhances light distribution by preventing complete shadowing of parallel light, allowing for efficient light utilization and maintaining a compact lamp design.
Implementation Method 1
a first inter-light source reflector and a second inter-light source reflector which are disposed so as to sandwich a line connecting the light sources adjacent to each other and which are configured to reflect a part of the light emitted from the light sources toward the projection lens
Implementation Method 2
a projection lens through which light emitted from the plurality of light sources is transmitted
Data Source
AI summary
A lamp includes a plurality of light sources arranged in parallel, a projection lens through which light emitted from the plurality of light sources is transmitted, and a first inter-light source reflector and a second inter-light source reflector which are disposed so as to sandwich a line connecting the light sources adjacent to each other and which are configured to reflect a part of the light emitted from the light sources toward the projection lens.