Automotive Lamp Light Guides with Refraction Structures
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Solution Overview
Problem
Existing automotive lighting devices lack high optical efficiency, particularly in distributing and emitting light uniformly for brake and taillamps, which affects visibility and safety.
Innovation Solution
A lamp design featuring a central lens, a side emitting lens, and a plurality of light guides with a light refraction structure, such as prisms or textured surfaces, to direct light into specific output beams, enhancing optical efficiency and uniform light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional lighting device is used, then the structure is simple, but the optical efficiency is low and light distribution is non-uniform
Solution Approach 1:
The lighting device is divided into multiple light guides, each responsible for directing light in specific directions. This segmentation allows efficient light distribution while maintaining manageable complexity through modular design
Solution Approach 2:
Multiple light guides are integrated into a single lamp housing with a unified light source, combining their light-directing functions to achieve high optical efficiency and uniform light distribution across the entire lighting device
2Illumination intensity
If light is emitted directly without optical elements, then the device complexity is low, but the light distribution uniformity is poor
Solution Approach 1:
Each light guide is equipped with specific optical elements (lenses, refraction structures) tailored to its function, creating localized light modification zones that collectively achieve uniform overall light distribution
Solution Approach 2:
Optical elements such as lenses and refraction structures serve as intermediaries between the light source and the environment, mediating light propagation to achieve uniform distribution without direct emission
3Manufacturing precision
If optical elements are added to improve light distribution, then the light distribution uniformity improves, but the manufacturing complexity increases
Solution Approach 1:
Optical elements are pre-formed with precise geometries (lens shapes, refraction angles) during manufacturing, allowing for controlled light distribution characteristics to be built into the components before assembly
Solution Approach 2:
The optical characteristics of light guides are controlled by adjusting parameters such as refraction angles, lens curvatures, and surface textures, allowing precise light distribution control through parameter optimization rather than complex structural changes
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 design achieves high optical efficiency and uniform light emission, improving visibility and safety by effectively redirecting and distributing light from the light source, making it suitable for vehicle lighting applications like brake lamps and taillamps.
Implementation Method 1
a central lens optically aligned with the light source to receive a first portion of light emitted by the light source and transmit the first portion of light in a first output beam
Implementation Method 2
each of the plurality of light guides has a light refraction structure on a first side for directing the second portion of the light in a second output beam from a second side
Implementation Method 3
The light refraction structure comprises a plurality of prisms
Implementation Method 4
The light refraction structure comprises a plurality of prisms; each prism has a V-shaped groove formed in a surface of a light transmissive medium
Implementation Method 5
the light refraction structure comprises a textured surface; the textured surface increases in density from the input to the output
Data Source
AI summary
A lamp includes a light source, a central lens optically aligned with the light source to receive a first portion of light emitted by the light source and transmit the first portion of light in a first output beam, a side emitting lens generally disposed between the central lens and the light source and arranged to receive a second portion of the light, and a plurality of light guides each having a light input end and operatively coupled to the side emitting lens to receive the second portion of light emitted from the light source that is directed through the side emitting lens and having a light output end, wherein each of the plurality of light guides has a light refraction structure on a first side for directing the second portion of the light in a second output beam from a second side.