Vehicle Light-Guiding Body Structure for Illuminance and Glare Control
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Solution Overview
Problem
Existing vehicle light-guiding bodies struggle to emit a light-distribution pattern with appropriate illuminance to the front of a vehicle.
Innovation Solution
The vehicle light-guiding body incorporates an incident surface, first and second reflection surfaces, a light shielding portion, an internal reflection surface, and an adjustment portion with a protruding inclined and folded surface to control light distribution, allowing for appropriate illuminance and reduced glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional light-guiding body integrates reflector, shade, and projection lens functions in one component, then device complexity is reduced, but the ability to emit light-distribution pattern with appropriate illuminance deteriorates
Solution Approach 1:
The light-guiding body is divided into multiple functional surfaces: incident surface, first reflection surface, second reflection surface, light shielding portion, internal reflection surface, emission surface, and adjustment portion. Each surface performs a specific optical function, allowing precise control of light distribution while maintaining integrated structure.
Solution Approach 2:
Different regions of the light-guiding body have different optical properties. The adjustment portion is specifically designed with protruding shape and inclined surface to modify light distribution in certain areas, while other regions maintain their original functions. This localized optimization enables appropriate illuminance distribution without redesigning the entire structure.
2Ease of manufacture
If the light-guiding body uses simple reflection surfaces, then manufacturing is easier, but glare control and brightness uniformity deteriorate
Solution Approach 1:
The internal reflection surface includes an adjustment portion with a protruding shape and inclined surface that specifically targets glare control. This localized modification redirects excessive light away from the emission direction, reducing glare while maintaining the overall simplicity of the reflection surfaces for easy manufacturing.
Solution Approach 2:
The adjustment portion acts as an intermediary element between the second reflection surface and the emission surface. It intercepts and redirects light that would otherwise cause glare, providing a simple yet effective solution that does not require complex additional components.
3Device complexity
If the light-guiding body uses a simple emission surface, then device complexity is reduced, but rapid brightness changes occur
Solution Approach 1:
The emission surface is designed with a specific shape and orientation that works in conjunction with the adjustment portion to stabilize brightness. The localized optical properties of the emission surface ensure uniform light output while maintaining the overall simplicity of the integrated structure.
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 enables the emission of a light-distribution pattern with appropriate illuminance and reduced glare, ensuring optimal visibility without rapid brightness changes.
Implementation Method 1
a first reflection surface that internally reflects the light incident from the incident surface
Implementation Method 2
a second reflection surface that internally reflects, to a front, at least a part of the light reflected by the first reflection surface so as to pass through a focal point and a vicinity of the focal point
Implementation Method 3
an internal reflection surface that is located between a front-side end part of the second reflection surface and the light shielding portion and internally reflects, to a front, a part of the light internally reflected by the second reflection surface
Implementation Method 4
an adjustment portion that is provided at a part which is a rear of the light shielding portion in the internal reflection surface and closer to one of right and left than the focal point of the second reflection surface and emits a part of the light reflected by the second reflection surface from a part different from the emission surface to an outside by internally reflecting or refracting a part of the light reflected by the second reflection surface
Implementation Method 5
an adjustment portion that is provided at a part which is a rear of the light shielding portion in the internal reflection surface and closer to one of right and left than the focal point of the second reflection surface and emits a part of the light reflected by the second reflection surface from a part different from the emission surface to an outside by internally reflecting or refracting a part of the light reflected by the second reflection surface
Data Source
AI summary
A light distribution pattern is emitted with appropriate illuminance. A vehicle light-guiding body has an incident surface; a first reflection surface; a second reflection surface; a light shielding portion; an internal reflection surface located between a front-side end part of the second reflection surface and the light shielding portion and internally reflects, to a front, a part of the light internally reflected by the second reflection surface; an emission surface; and an adjustment portion provided at a part which is a rear of the light shielding portion in the internal reflection surface and closer to one of right and left than the focal point of the second reflection surface and emits a part of the light reflected by the second reflection surface from a part different from the emission surface to an outside by internally reflecting or refracting a part of the light reflected by the second reflection surface.