Vehicle Mirror Turn Lamp Light Guide Lens Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional turn lamps for vehicle outside mirrors face challenges in efficiently directing light beams from a light source with optical axes in one direction towards opposite ends of a light guide lens while minimizing the lamp's length and avoiding interference with internal structures, and complicating the mounting process of LEDs with different optical axes.
Innovation Solution
A turn lamp design featuring a light guide lens with a reflective surface on its backside, where LEDs with optical axes in the same direction are mounted on a single substrate, allowing one LED's light to enter directly and the other's light to be reflected, enabling efficient guidance towards both ends without diffusing widely, and integrating a convex lens for collimated light entry, reducing refraction and misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light source is arranged at an end of the light guide lens, then light can be guided over the entire length of the light guide lens, but the entire length of the turn lamp increases
Solution Approach 1:
The light source is positioned on the back side of the light guide lens rather than at the end, utilizing the depth dimension to achieve compact overall length while maintaining effective light guidance through the lens structure
Solution Approach 2:
A reflective surface is introduced as an intermediary element to redirect light from the back-side positioned light source toward the end of the light guide lens, enabling compact arrangement while maintaining light guidance efficiency
2Length of stationary object
If the light source is arranged on the back side of the light guide lens, then the entire length of the turn lamp is suppressed, but light beams must be emitted in different directions toward opposite ends
Solution Approach 1:
The light guide lens is functionally segmented into two light guidance paths: one for light traveling directly from the light source to one end, and another for light reflected by the reflective surface to the opposite end, enabling compact arrangement with simplified directional control
Solution Approach 2:
Different regions of the light guide lens are optimized for different light paths: one region receives direct light from the light source while another region receives reflected light, with each region having tailored optical properties for its specific function
3Ease of operation
If LEDs with different optical axes are mounted separately, then light can be directed toward opposite ends, but the mounting process becomes complicated
Solution Approach 1:
Multiple LEDs with different optical axes are mounted on a single common substrate rather than separate substrates, integrating multiple light sources into one assembly unit to simplify the mounting process while maintaining the ability to direct light toward opposite ends of the light guide lens
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 design allows for efficient light distribution towards opposite ends of the light guide lens, reduces the lamp's length, simplifies LED mounting, and minimizes interference with internal structures, while maintaining design flexibility and reducing dark areas between light entry points.
Implementation Method 1
another part of the light beam emitted from the light source is reflected by the reflective surface and obliquely enters the light guide lens toward another end in the long direction of the light guide lens
Implementation Method 2
a light beam emitted from the light source entering a predetermined position on the back side of the light guide lens and being radiated from surfaces of respective parts of the light guide lens to an outside of the light guide lens while being guided inside the light guide lens
Implementation Method 3
being guided inside the light guide lens
Data Source
AI summary
While a light source is arranged on the back side of a light guide lens, light beams can be emitted from the light source with respective optical axes directed in one direction and be guided toward opposite ends of the light guide lens. A light source and a reflective surface are arranged on the back side of a light guide lens. The light source emits light beams with respective optical axes directed in one direction. One of the light beams obliquely enters the light guide lens toward one end in a long direction of the light guide lens without being reflected by the reflective surface. Another one of the light beams is reflected by the reflective surface and obliquely enters the light guide lens toward another end in the long direction of the light guide lens.