Vehicular Headlight Extension Member Heat Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicular headlight extension members experience temperature rises due to sunlight absorption from internal reflections in the lens, which affects their appearance and functionality.
Innovation Solution
A vehicular headlight design featuring a light-transmitting extension member with a colored portion on one surface and a light-scattering portion on the other, positioned below the lens to scatter focused sunlight, reducing heat absorption and enhancing appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a colored extension member is placed along the outer periphery of the lens to improve appearance, then the appearance is improved, but the temperature of the extension member rises due to heat absorption from focused sunlight
Solution Approach 1:
The extension member is designed with spatially varying properties: the upper portion (exposed to focused sunlight) has light scattering characteristics to reduce heat absorption, while the lower portion maintains colored appearance for aesthetic purposes. This local differentiation resolves the contradiction by applying different functional qualities to different regions of the same component.
Solution Approach 2:
A light scattering layer or structure is introduced as an intermediary between the sunlight and the colored extension member. This intermediary scatters the focused sunlight before it reaches the colored portion, reducing heat absorption while preserving the appearance-enhancing colored design.
2Shape
If the extension member is made opaque to improve appearance, then the appearance is improved, but light transmission is blocked causing heat accumulation
Solution Approach 1:
The extension member employs local quality differentiation where the upper portion has light scattering or translucent properties to allow light transmission and reduce heat accumulation, while the lower portion has colored opaque properties for appearance enhancement. This resolves the contradiction by optimizing different regions for different functions.
Solution Approach 2:
The extension member uses composite material structure combining materials with different optical properties - one material provides light scattering/transmission to reduce heat, while another provides colored appearance. The composite structure allows simultaneous achievement of appearance improvement and heat mitigation.
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 solution effectively suppresses heat generation in the extension member while improving the headlight's appearance by scattering focused sunlight, thereby reducing temperature rises and enhancing aesthetic appeal.
Implementation Method 1
a light-scattering portion provided at least in a portion of the light-transmitting member below the lens in a vehicle-mounted state
Implementation Method 2
a light-transmitting member that has a plate shape, that is provided with a first surface facing forward in the vehicle-mounted state and a second surface on an opposite side to the first surface, and that is capable of transmitting light from the first surface to the second surface
Implementation Method 3
a colored portion disposed on the second surface of the light-transmitting member
Data Source
AI summary
In order to provide a vehicular headlight in which a rise in temperature of an extension member due to sunlight can be suppressed, and for which the appearance can be improved, a vehicular headlight includes: a light source; a reflector that reflects light from the light source; a lens having an entry surface through which light reflected by the reflector enters, and an exit surface from which the light that has entered the entry surface exits into an irradiation region in front of the vehicle; an extension member disposed at least in front of and below the lens in a vehicle-mounted state, and including a colored portion and a light-transmitting member that is disposed covering the colored portion and is capable of transmitting light; and a light-scattering portion provided at least in a portion of the light-transmitting member below the lens in the vehicle-mounted state.