Headlight Module Optical Element Reflecting Surface Design
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Solution Overview
Problem
The existing headlight devices have low light use efficiency due to the use of a light blocking plate, which blocks part of the light emitted from the source and is not used for projection, and also face challenges in manufacturability due to the requirement for high accuracy in placement of optical components, especially in downsized systems.
Innovation Solution
A headlight module that includes a light source and an optical element with a first and second reflecting surface, where the second reflecting surface reflects light passing through the edge portion of the first reflecting surface to form a high luminous intensity region and a cutoff line in the light distribution pattern, reducing the need for a light blocking plate and improving manufacturability by simplifying the optical system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light blocking plate is used to form the cutoff line, then the light distribution pattern can be formed, but the light use efficiency is reduced
Solution Approach 1:
The invention extracts and eliminates the light blocking plate from the optical system. Instead of using a separate light blocking plate to form the cutoff line, the patent designs the reflector's second reflecting surface to directly form the cutoff line by reflecting light at specific angles, thereby removing the component that causes light loss and improving light use efficiency
Solution Approach 2:
The invention merges the cutoff line formation function into the reflector structure itself. The second reflecting surface of the reflector is designed to form the cutoff line while also performing light reflection, combining two functions (light reflection and cutoff line formation) into a single component, thereby eliminating the need for a separate light blocking plate
2Illumination intensity
If a light blocking plate is used to form the cutoff line, then the light distribution pattern can be formed, but the device complexity increases
Solution Approach 1:
The invention merges the cutoff line formation function into the reflector structure itself. The second reflecting surface of the reflector is designed to form the cutoff line while also performing light reflection, combining two functions (light reflection and cutoff line formation) into a single component, thereby eliminating the need for a separate light blocking plate
Solution Approach 2:
The invention extracts and eliminates the light blocking plate from the optical system. Instead of using a separate light blocking plate to form the cutoff line, the patent designs the reflector's second reflecting surface to directly form the cutoff line, thereby removing the component and simplifying the optical system
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 enhances light use efficiency by eliminating the need for a light blocking plate and improves manufacturability by simplifying the optical system, while maintaining compliance with road traffic light distribution patterns.
Implementation Method 1
a first reflecting surface for reflecting the light as first reflected light
Implementation Method 2
a second reflecting surface for reflecting, as second reflected light, light passing through a traveling direction side of an edge portion of the first reflecting surface
Data Source
AI summary
A headlight module for projecting a light distribution pattern includes: a light source for emitting light; and an optical element including a first reflecting surface for reflecting the light as first reflected light, a second reflecting surface for reflecting, as second reflected light, light passing through a traveling direction side of an edge portion of the first reflecting surface, a first emitting surface for emitting the first reflected light, and a second emitting surface for emitting the second reflected light, the traveling direction side being a side toward which the first reflected light travels. The edge portion is an edge portion on the traveling direction side. The first reflecting surface forms a high luminous intensity region of the light distribution pattern by superposing the first reflected light and light that has not been reflected by the first reflecting surface, and forms a cutoff line of the light distribution pattern.