Vehicle Lamp Lens Structure for Lateral Light Distribution
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Solution Overview
Problem
Existing vehicle lamps face issues with internal light reflection and inefficient light distribution, affecting visibility and design aesthetics, particularly in the vehicle width direction as required by regulations.
Innovation Solution
A vehicle lamp design featuring a lens with cut regions and additional reflective surfaces that redirect light outward along the optical axis and intersecting directions, utilizing lens cut parts and additional reflective surfaces to enhance light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If light is emitted into the lens at various angles, then the lens can cover a wide area, but internal reflection occurs reducing visibility and design aesthetics
Solution Approach 1:
The lens inner surface is divided into multiple lens cut regions, each corresponding to a light source. Within each region, lens cut parts segment the light paths to control reflection and emission directions, separating useful light from harmful internal reflections
Solution Approach 2:
Different regions of the lens inner surface are given different optical properties through lens cut parts. Each lens cut region is optimized for its specific light source, creating local quality variations that control light distribution and reduce internal reflection in specific areas
2Ease of manufacture
If the lens structure is simplified, then manufacturing is easier, but light distribution efficiency in the vehicle width direction is reduced
Solution Approach 1:
The lens is segmented into multiple cut regions with lens cut parts that can be integrated into a single lens manufacturing process. This segmentation provides complex light distribution functionality while maintaining a unified lens structure that can be manufactured in one piece
Solution Approach 2:
The lens cut parts introduce additional optical dimensions by creating specific geometric features on the lens inner surface. These features add functional complexity for light distribution without requiring multiple separate optical components, maintaining manufacturing simplicity
3Illumination intensity
If light is directed primarily along the optical axis, then visibility from the front is improved, but light emission in the vehicle width direction is insufficient
Solution Approach 1:
The lens cut regions are segmented into different functional zones: some regions direct light along the optical axis for front visibility, while other regions with lens cut parts redirect light at angles to achieve vehicle width direction emission, satisfying both requirements simultaneously
Solution Approach 2:
The lens structure serves multiple functions: it acts as a protective cover, a light distributor, and a reflection controller. The lens cut parts enable the same lens to perform both forward light transmission and lateral light distribution, achieving multi-functionality without additional 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
Improves visibility and design aesthetics by efficiently directing light outward in the vehicle width direction, meeting regulatory requirements with a simple structure.
Implementation Method 1
the additional reflective surface internally reflects light internally reflected on an outer surface of the lens and performs orientation so that the light is emitted outward along a direction intersecting with the optical axis direction
Implementation Method 2
In the lens cut region, at least one lens cut part is formed, and the at least one lens cut part distributes light so that the light emitted from the light source into the lens is emitted outward along an optical axis direction
Data Source
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AI summary
Provided is a vehicle lamp making it possible to improve visibility from the exterior and design properties, and effectively distribute light emitted from a light source, thus efficiently obtaining light which is emitted outward in the vehicle width direction, as is legally required. A vehicle lamp (1) is provided with a lens (4), and a luminous body (6) for emitting light (B) to an outer surface (10a) side of a lens body (10) via the lens (4). An inner surface (10b) of the lens body (10) has a lens cut region (AR), and in the lens cut region, formed is at least one lens cut part (16) for distributing light so that the light (B) that is from the luminous body (6) and incident in the lens (4) is emitted outwardly along the optical axis (OP) direction. An additional reflective surface (18) is formed in part of the lens cut region. Of the light (B) that is from the luminous body (6) and incident in the lens (4), the additional reflective surface (18) internally reflects the light (B) that is internally reflected at the outer surface (10a), and the additional reflective surface orients the light (B) so that the same is emitted outwardly along a direction intersecting the optical axis (OP) direction.