Vehicular Lamp Uniform Illumination via Diffusing Treatment
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Solution Overview
Problem
Vehicular lamps for two-wheel and four-wheel vehicles face challenges in illuminating short-distance road surfaces uniformly without light distribution unevenness, while also requiring a compact and cost-effective configuration that improves lamp efficiency and appearance by ensuring high positional accuracy of components.
Innovation Solution
A vehicular lamp configuration that includes a projection lens, a reflector, and a light diffusing treatment on the reflective surface to illuminate a short-distance road surface uniformly, with the projection lens supported by a light source support member and a common heat sink, and the light emitting elements inclined to efficiently direct light onto the projection lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light diffusing treatment is applied to the reflective region to illuminate the short-distance road surface uniformly, then light distribution unevenness is reduced, but the manufacturing complexity of the reflector increases
Solution Approach 1:
The patent applies a light diffusing treatment specifically to the reflective region that illuminates the short-distance road surface, while other regions of the reflector maintain their original reflective properties. This localized treatment achieves uniform illumination where needed without unnecessarily complicating the entire reflector structure.
Solution Approach 2:
The patent changes the optical parameters of the reflective region by applying a light diffusing treatment, which modifies the reflectivity characteristics to distribute light more uniformly. This parameter change enables uniform illumination of the short-distance road surface while maintaining the overall simplicity of the reflector design.
2Stability of the object's composition
If the projection lens is supported by a light source support member via a bracket unit, then the lamp structure is stable, but the number of parts increases and cost increases
Solution Approach 1:
The patent merges the projection lens support function with the light source support member, eliminating the need for a separate bracket unit. The light source support member directly supports the projection lens, reducing the number of parts while maintaining structural stability.
Solution Approach 2:
The light source support member is designed to perform multiple functions: supporting the light source and supporting the projection lens. This multi-functionality eliminates the need for dedicated bracket units, reducing part count and cost while maintaining structural integrity.
3Shape
If an extension is arranged to surround the projection lens for appearance purposes, then the lamp appearance is improved, but the number of parts increases and cost increases
Solution Approach 1:
The patent integrates the appearance-improving coverage function into the existing light source support member and heat sink structure, eliminating the need for a separate extension component. The light source support member and heat sink are designed to provide both functional and appearance benefits without additional parts.
4Manufacturing precision
If the substrate and reflector are arranged with high positional accuracy with respect to the heat sink, then light distribution performance is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates positioning protrusions and positioning holes in advance during the design stage, which guide the substrate and reflector into their correct positions relative to the heat sink during assembly. This preliminary positioning feature ensures high positional accuracy without requiring complex manufacturing processes.
Solution Approach 2:
The positioning protrusions and positioning holes act as intermediary elements that mediate between the substrate/reflector and the heat sink, ensuring accurate alignment. These intermediary features simplify the manufacturing process by providing built-in alignment guidance rather than requiring complex precision machining of all components.
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 configuration achieves uniform illumination of short-distance road surfaces with reduced light distribution unevenness, minimizes the number of parts, and ensures the appearance of the lamp without external cover members, while improving lamp efficiency and positional accuracy of components.
Implementation Method 1
a light diffusing treatment for diffusing and reflecting emitted light from the light source is applied to the reflective region
Implementation Method 2
a vehicular lamp configured to radiate, toward front of the lamp via a projection lens, light from a light source, which is reflected by a reflector
Implementation Method 3
a projection lens configured to focus light from the light source onto the short-distance road surface
Data Source
AI summary
A vehicular lamp includes a light source, a reflector, and a projection lens. The vehicular lamp is configured to radiate, toward front of the lamp via the projection lens, light from the light source, the light being reflected by the reflector. A reflective surface of the reflector includes a reflective region configured to illuminate a short-distance road surface within 5 m in front of the lamp. A light diffusing treatment for diffusing and reflecting emitted light from the light source is applied to the reflective region.