Vehicle Lens Device with Segmented Rear Reflector for Convex Front
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Solution Overview
Problem
Conventional vehicle lighting assemblies require an optical lens with a convex lens front to achieve a specific light distribution pattern, which is not effectively addressed by existing designs.
Innovation Solution
The lens device features a rear lens segment with a recess and reflective surface, and a front lens segment with a convex profile, where light beams enter through refractive surfaces and converge at focal regions, ensuring the output light beams have a desired distribution pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the lens front is made convex to meet aesthetic or aerodynamic requirements, then the appearance or aerodynamic performance is improved, but the light distribution pattern becomes distorted and deviates from the desired pattern
Solution Approach 1:
The optical lens is divided into two distinct segments: a rear lens segment containing the recess and reflective surface for light manipulation, and a front lens segment with the convex profile for aesthetic or aerodynamic purposes. This segmentation allows each segment to fulfill its specific function independently, resolving the contradiction between shape requirements and light distribution requirements.
Solution Approach 2:
The rear lens segment acts as an intermediary between the light source and the convex front lens segment. It pre-shapes and directs the light beams through the recess and reflective surface before they reach the convex front, ensuring that the final light distribution pattern remains correct despite the convex profile's potential distortion effects.
2Ease of manufacture
If the lens front is made flat to maintain simple manufacturing, then manufacturing complexity is reduced, but the light beams cannot be effectively parallelized and distributed as required
Solution Approach 1:
The lens is segmented into functional zones: the rear lens segment with the recess and reflective surface handles light beam manipulation and parallelization, while the front lens segment can be simpler in form. This division allows the complex light control functions to be concentrated in the rear segment, maintaining ease of manufacture for the front segment while achieving effective light parallelization.
3Shape
If a convex lens front is used to achieve aesthetic or aerodynamic goals, then the appearance or aerodynamic performance is improved, but additional optical elements or complex structures are needed to maintain proper light distribution
Solution Approach 1:
The patent merges the light manipulation functions (recess, reflective surface, focal region control) into the rear lens segment that is integrally connected to the front lens segment. This combining of functions within a unified two-segment structure avoids the need for separate optical elements or complex additional structures, maintaining relatively simple device complexity while achieving both convex shape and proper light distribution.
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 novel lens device achieves a light distribution pattern similar to that of a conventional optical lens with a flat lens front, with the convex lens front ensuring the light beams are substantially parallel and distributed effectively.
Implementation Method 1
when the light beams from the light emitter enter the optical lens through the first refractive surface to form a plurality of first refracted light beams in the optical lens
Implementation Method 2
when the light beams from the light emitter enter the optical lens through the second refractive surface and then are reflected by the reflective surface to form a plurality of reflected light beams
Implementation Method 3
the second refractive surface and the reflective surface are configured such that when the light beams from the light emitter enter the optical lens through the second refractive surface and then are reflected by the reflective surface
Data Source
AI summary
A lens device includes at least one optical lens which includes rear and front lens segments. The rear lens segment has a first refractive surface, a second refractive surface, and a reflective surface. The front lens segment has a convex lens front which defines a rear focal region. When light beams enter the optical lens through the second refractive surface and then are reflected by the reflective surface to form a plurality of reflected light beams, a plurality of second imaginary lines, extending rearwardly and respectively from the reflected light beams, converge at a second focal region overlapping with the rear focal region.