Vehicular Lamp Fitting Uniform Brightness via Segmented Reflector
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Solution Overview
Problem
Conventional vehicular lamp fittings with light guide bodies and reflectors struggle to maintain uniform brightness and appearance, leading to visibility issues from the lateral side, as the vicinity of the light guide body appears brighter than other parts, causing a difference in brightness that is difficult to address.
Innovation Solution
A vehicular lamp fitting design featuring a reflector with a first and second reflector portion, a light guide member, and strategically placed light sources, where the light guide members are oriented to direct light to the reflector portions, and cutout parts are used at the contact area to prevent linear dark spots, ensuring uniform light distribution and improved visibility from the lateral side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide body and reflector are used in a vehicular lamp fitting, then light can be directed to the front side, but the vicinity of the light guide body becomes brighter than other parts, causing non-uniform brightness and poor appearance
Solution Approach 1:
The reflector is divided into multiple reflection portions (first reflection portion, second reflection portion, third reflection portion) that are spatially separated and oriented at different angles. This segmentation allows each portion to control light distribution in different directions, preventing concentration of light at any single location and achieving uniform brightness distribution across the lamp fitting.
Solution Approach 2:
Each reflection portion of the reflector is designed with specific local characteristics - the first reflection portion reflects light to the front, the second to the lateral side, and the third to the rear. This local differentiation of reflection functions ensures that light is distributed uniformly across different regions, eliminating the brightness concentration problem near the light guide body.
2Illumination intensity
If a conventional reflector design is used, then light is reflected to the front side, but visibility from the lateral side is insufficient
Solution Approach 1:
The reflector is segmented into multiple functional portions, including a second reflection portion specifically oriented to reflect light toward the lateral side. This segmentation enables the lamp fitting to provide illumination in multiple directions simultaneously, significantly improving lateral visibility while maintaining front-side illumination.
Solution Approach 2:
The reflector design extends light distribution from a single-dimensional front direction to multi-dimensional distribution by adding reflection portions oriented at different angles. The second reflection portion directs light laterally, and the third reflection portion directs light to the rear, creating three-dimensional light distribution that improves visibility from multiple viewpoints.
3Illumination intensity
If multiple reflector portions are added to improve light distribution, then visibility and appearance are improved, but device complexity increases
Solution Approach 1:
Multiple reflection portions are merged into a single integrated reflector structure rather than being separate components. This merging approach maintains the functional benefits of multiple reflection directions while simplifying the overall device structure, reducing the number of parts, and easing assembly and manufacturing processes.
Solution Approach 2:
The single reflector structure performs multiple functions by incorporating different reflection portions that direct light in various directions (front, lateral, rear). This multi-functional design eliminates the need for separate reflectors for different directions, reducing device complexity while achieving uniform light distribution and improved visibility from multiple angles.
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 enhances the appearance and visibility from the lateral side by ensuring uniform light emission and reducing brightness differences, improving the overall aesthetic and functional performance of the vehicular lamp fitting.
Implementation Method 1
direct light which is reflected by a reflection surface of the first light guide member and then is emitted to the first reflector portion's side
Implementation Method 2
a first reflector portion to reflect light to the vehicular front side
Implementation Method 3
the second light guide member has a reflection surface to reflect the light that is guided in the second light guide member, to the second reflector portion's side
Implementation Method 4
the second reflector portion... reflects the light to a vehicular front side
Data Source
AI summary
A vehicular lamp fitting is provided with: a reflector having a first reflector portion; an inner panel; a first light guide member provided along an edge of the first reflector portion toward the center of the vehicle and disposed to be opposed to the first reflector portion; and a light source provided at least on either one end or the other end of the first light guide member so as to allow light to be incident on the first light guide member. The first light guide member is disposed so as to be visually recognized from the side of the vehicle, and part of direct light reflected by a reflective surface of the first light guide member and emitted toward the first reflector portion that has not been emitted ahead of the vehicle by the first reflector portion is emitted toward the side of the vehicle.