Vehicle Lamp Fitting Layout for Compact Projection Optics
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Solution Overview
Problem
Existing lamp units are not adequately downsized, necessitating a need for a more compact configuration.
Innovation Solution
A lamp unit design featuring a light emission unit with its center above the projection lens optical axis, a condenser lens with a unique arrangement of lens portions, and a light blocking member with upward-extending slits, combined with a projection lens to form efficient irradiation patterns while minimizing vertical space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional lamp unit configuration is used, then adequate light projection is achieved, but the overall size cannot be downsized
Solution Approach 1:
The patent repositions the light emission unit so its center is above the projection lens optical axis, and arranges the slit to extend upward from the optical axis. This vertical dimension reconfiguration allows compact horizontal spacing while maintaining adequate light path length for quality projection, effectively downsizing the lamp unit without sacrificing performance
Solution Approach 2:
The patent employs asymmetric arrangement where the light emission unit center is positioned above the projection lens optical axis, and the slit extends upward rather than symmetrically. This asymmetric configuration optimizes space utilization and enables downsizing while preserving light projection quality through carefully designed optical paths
2Length of stationary object
If light emission unit center is positioned above projection lens optical axis, then vertical space is minimized, but optical alignment becomes more complex
Solution Approach 1:
The patent applies local quality by positioning the light emission unit center above the projection lens optical axis and configuring the slit to extend upward. This localized asymmetric arrangement optimizes vertical space utilization in the critical optical path region while the overall structure remains manageable, reducing vertical footprint without excessive complexity increase
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 allows for a downsized lamp unit and vehicle lamp by efficiently utilizing space and projecting clear, high-intensity irradiation patterns without significant aberration, enhancing visibility.
Implementation Method 1
a condenser lens that condenses light emitted from the light emission unit
Implementation Method 2
a projection lens that projects the light that has passed through the light blocking member to form an irradiation pattern
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A lamp unit includes: one light emission unit that emits light; a condenser lens that condenses light emitted from the light emission unit; a light blocking member having a slit through which the light condensed by the condenser lens passes; and a projection lens that projects the light that has passed through the light blocking member to form an irradiation pattern. The light emission unit is arranged such that a center thereof in an up-down direction is above a projection lens optical axis. The slit is arranged to extend upward from the projection lens optical axis.