Automotive Optical Guide with Segmented Reflection and Diffusion Patterns
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Solution Overview
Problem
Motor vehicle optical guides face challenges in achieving uniform light distribution and high photometric values across a wide range of viewing angles, with existing designs often favoring illumination along the vehicle axis and lacking aesthetic appeal when viewed from other angles.
Innovation Solution
A light device featuring a combination of optical reflection and diffusion patterns within the guide, allowing directed and diffused light fractions to be superimposed, providing enhanced photometry and visibility while maintaining a sleek design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If optical patterns are designed to emit light mainly in the vehicle axis direction to meet photometric standards, then photometric values are improved, but the angular distribution of light becomes insufficient and uniformity across viewing angles deteriorates
Solution Approach 1:
The optical guide is divided into multiple zones along its length, with each zone containing a different type of optical pattern (reflective patterns in some zones, diffusive patterns in others). This segmentation allows different portions of the guide to perform different functions: reflective zones concentrate light in the vehicle axis direction for photometric compliance, while diffusive zones spread light across wider angles for uniform appearance from various viewing positions.
2Illumination intensity
If optical guides are designed to emit light in a preferred direction, then photometric performance is improved, but uniform appearance from different viewing angles deteriorates
Solution Approach 1:
Different local regions of the optical guide are赋予 different optical properties. Reflective optical patterns are placed in regions where concentrated light emission in the vehicle axis direction is needed to achieve photometric standards. Diffusive optical patterns are placed in regions where wide-angle light distribution is needed to ensure uniform appearance from various viewing angles. This local differentiation of optical properties resolves the contradiction between directed illumination and uniform appearance.
3Adaptability or versatility
If Lambertian diffusion patterns are used to achieve wide viewing angle visibility, then angular distribution is improved, but photometric values become limited
Solution Approach 1:
The optical guide is segmented into zones with different optical characteristics. Zones containing Lambertian diffusive patterns provide wide viewing angle visibility and uniform appearance. Zones containing reflective patterns concentrate light in the vehicle axis direction to achieve high photometric values. The combination of these segmented zones allows the overall system to achieve both wide viewing angle visibility and high photometric performance simultaneously.
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 achieves a more uniform and aesthetically pleasing illuminated appearance over a wide range of angles, with improved photometric performance and a harmonious aesthetic both on and off.
Implementation Method 1
the light rays emitted by this source are propagated by total reflection in the length of the guide towards its opposite end
Implementation Method 2
A part of the light rays propagating in the guide exits via a face called the front face of the guide thanks to the presence of reflective optical patterns
Implementation Method 3
optical guides provided with optical patterns allowing diffusion of light in a Lambertian manner, that is to say, in all directions of space
Data Source
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AI summary
The device has a light source (1) for emitting a light beam, and an optical guide (3) allowing propagation of the light beam into the guide. The guide includes a light exit face and a set of optical reflection patterns (20) for reflection of directed fractions (17) from the light beam through the exit face according to a preferred direction. The guide includes a set of optical diffusion patterns (22) for diffusion of diffused fractions (19) from the light beam through the exit face. Reflection patterns are alternated with the diffusion patterns.