Vehicle Optical Structure with Reflective Shield for Light Leakage
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Solution Overview
Problem
Existing optical systems for vehicle headlamps face challenges in reducing the size of optical modules while maintaining efficient light distribution, as thin aspherical lenses tend to leak light, causing obstructions and design inefficiencies.
Innovation Solution
An optical structure comprising a plurality of optics with a reflective shield between the optic unit and lens, utilizing a semicircular aspherical lens with upper and lower cut surfaces, and a Bezier curve outer surface to redirect and focus light efficiently, thereby reducing module size and implementing a thin, elongated headlamp design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a thin aspherical lens is applied to reduce the optical module size, then the head lamp becomes thinner and more compact, but light leaks outside the lens causing beam pattern obstructions
Solution Approach 1:
A reflective shield is introduced as an intermediary component between the LED and the aspherical lens. This shield has a reflective surface that redirects light which would otherwise leak outside the lens, directing it toward the lens instead. This mediator component solves the light leakage problem without requiring a larger lens or optical module.
Solution Approach 2:
The harmful light leakage is extracted and redirected separately from the main optical path. By using the reflective shield to capture and redirect the leaked light, the system separates the problematic stray light from the primary beam path and redirects it to a useful position, eliminating the obstruction issue.
2Ease of manufacture
If the lens size is reduced to achieve a compact design, then manufacturing and installation become easier, but light distribution efficiency degrades due to increased light leakage
Solution Approach 1:
The reflective shield acts as a mediator that compensates for the reduced light collection area of the smaller lens. By redirecting stray light into the lens, it ensures that the smaller lens still achieves adequate light distribution efficiency, maintaining energy effectiveness despite the size reduction.
3Length of stationary object
If a thin aspherical lens with upper and lower cut surfaces is used, then the head lamp achieves a thin and elongated design, but the beam pattern width becomes restricted
Solution Approach 1:
The reflective shield mediates between the geometric constraints of the thin lens and the beam pattern requirements. By redirecting light at specific angles, it effectively widens the beam pattern distribution without requiring a larger or differently shaped lens, thus maintaining the thin profile while achieving the desired 30-degree beam width.
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 reduces the size of the optical module, enhances luminous intensity, and blocks leaked light, achieving a desired beam pattern with a width of 30 degrees, improving design efficiency and compliance with regulatory standards.
Implementation Method 1
a shield which is provided between the optic unit and the lens to reflect light which passes through the optic toward the lens
Implementation Method 2
a lens which is provided with an interval from the optic unit... The lens may be an aspherical lens... a semicircular aspherical lens having upper and lower cut surfaces
Data Source
AI summary
The present invention provides an optical structure for a vehicle, including: an optic unit which is configured by a plurality of optics; a lens which is provided with an interval from the optic unit; and a shield which is provided between the optic unit and the lens to reflect light which passes through the optic toward the lens.