Light Source Distribution Element for Headlight Device
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Solution Overview
Problem
The light guide body in existing low-beam headlight devices has a complex configuration with multiple total reflection surfaces, making it difficult to achieve a simple and downsized structure without compromising light use efficiency.
Innovation Solution
A light source distribution element with a simplified structure, featuring an incident portion, emission portions, and light guide portions that guide light from the incident portion to the emission portions using reflection surfaces, allowing for a compact design without reducing light use efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multiple total reflection surfaces are arranged inside the light guide body, then light use efficiency is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple light guide body portions (first light guide body portion and second light guide body portion with left and right portions) into a single integrated light guide body. This merging reduces the number of separate components and assembly steps while maintaining the multiple total reflection surfaces needed for high light use efficiency, thus resolving the contradiction between efficiency and complexity.
Solution Approach 2:
The light guide body is segmented into functional regions (incident portion, emission portion, total reflection portion, attachment portion) and structural portions (first and second light guide body portions). This segmentation allows each region to be optimized for its specific function while being manufactured as an integrated whole, reducing overall device complexity while preserving light efficiency.
2Use of energy by moving object
If multiple light guide body portions are arranged along the optical axis, then light use efficiency is improved, but device length increases
Solution Approach 1:
The patent transitions from arranging light guide body portions sequentially along the optical axis to a planar configuration where the first and second light guide body portions are arranged side-by-side in a direction perpendicular to the optical axis. This dimensional change reduces the optical path length while maintaining multiple reflection opportunities, thus improving light efficiency without increasing device length.
Solution Approach 2:
The second light guide body portion with its left and right portions is positioned to overlap or adjacently nest with the first light guide body portion in the vertical direction. This nesting arrangement allows multiple light guide paths to coexist in a compact space, reducing the overall device length while maintaining light efficiency.
3Use of energy by moving object
If the light guide body is configured with first and second light guide body portions, then light distribution is improved, but device width increases
Solution Approach 1:
The light guide body is designed as a thin, planar structure where the first and second light guide body portions are arranged in a compact configuration. The thin film-like structure allows efficient light distribution across the emission surface while minimizing the device width, as the light guide paths are optimized to achieve uniform distribution without requiring excessive lateral space.
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 a thin and compact light source distribution element that maintains high light use efficiency, simplifying the structure and reducing size while ensuring effective light distribution.
Implementation Method 1
a second light guide portion that is located between the second joint surface of the incident portion and the second emission portion, has a first reflection surface formed on one of opposite side faces of the second light guide portion in the second direction and a second reflection surface formed on another one of the opposite side faces, and is to reflect light from the second joint surface of the incident portion by using the first reflection surface and the second reflection surface to guide the light to the second emission portion
Data Source
AI summary
A light source distribution element for headlight device includes: a first light guide portion that is located between a first joint surface of an incident portion and a first emission portion, and is to guide light from the first joint surface of the incident portion to the first emission portion; and a second light guide portion that is located between a second joint surface of the incident portion and a second emission portion, has a first reflection surface formed on one of opposite side faces of the second light guide portion and a second reflection surface formed on the other one of the opposite side faces, and is to reflect light from the second joint surface of the incident portion by using the first reflection surface and the second reflection surface to guide the light to the second emission portion.