Vehicle Light Guide Structure for Precise Low-Beam Distribution
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Solution Overview
Problem
Existing vehicle light guide bodies struggle with fine light distribution control, particularly for low beam applications, as they rely solely on the incident part for light control, which is insufficient for precise light management.
Innovation Solution
A vehicle light guide body incorporating an incident surface, a first reflective surface for forming nearly parallel light, a second reflective surface shaped like a paraboloid of revolution for forward light reflection, a third reflective surface for diffusing light, and a light shielding part to control light emission, allowing for precise light distribution patterns through a combination of light condensing and diffusion patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light is controlled only by the incident part, then the structure is simple, but fine light distribution control cannot be achieved
Solution Approach 1:
The reflective surface is segmented into multiple functional zones: a first reflective surface for general light reflection, a second reflective surface with paraboloid shape for forming parallel light, a third reflective surface for diffusion pattern formation, and a light condensing pattern forming surface. Each segment performs a specific light control function, enabling fine light distribution control while maintaining a relatively integrated structure.
Solution Approach 2:
Different regions of the reflective surface are given different optical properties and shapes. The light condensing pattern forming surface has a specific curvature to concentrate light, while the diffusion pattern forming surface has a different geometry to scatter light. This local differentiation allows precise control over light distribution patterns in different areas of the headlight beam.
2Manufacturing precision
If multiple reflective surfaces with different functions are added, then fine light distribution control is achieved, but device complexity increases
Solution Approach 1:
Multiple reflective surfaces with different functions (first reflective surface, second reflective surface with paraboloid shape, third reflective surface, light condensing pattern forming surface, and diffusion pattern forming surface) are merged into a single integrated light guide body. This combining approach achieves fine light distribution control through multiple optical functions while avoiding the complexity of assembling separate components.
Solution Approach 2:
The light guide body serves multiple functions simultaneously: it reflects light, forms parallel beams, creates diffusion patterns, condenses light patterns, and controls overall light distribution. This multi-functionality is achieved within a single structural component, reducing the need for multiple separate devices.
3Manufacturing precision
If light condensing and diffusion patterns are combined, then pattern clarity and luminous intensity adjustment are improved, but manufacturing complexity increases
Solution Approach 1:
The optical parameters of different surface regions are precisely controlled during manufacturing. The light condensing pattern forming surface has specific curvature radii and angles optimized for light concentration, while the diffusion pattern forming surface has different geometric parameters for light scattering. These parameter variations are integrated into the molding process to achieve clear patterns while maintaining manufacturing feasibility.
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
Enables fine light distribution control, allowing for the formation of appropriate headlight patterns with enhanced luminous intensity adjustment on both inner and outer sides, reducing light wastage and improving pattern clarity.
Implementation Method 1
a first reflective surface that internally reflects light that has entered from the incident surface to form nearly parallel light
Implementation Method 2
a second reflective surface that has a shape based on a paraboloid of revolution and internally reflects the light from the first reflective surface forward in a front-rear direction
Implementation Method 3
the second reflective surface has a diffusion pattern forming surface that reflects a part of the light from the first reflective surface toward the third reflective surface
Implementation Method 4
the third reflective surface internally reflects the light from the diffusion pattern forming surface toward the light emitting surface
Implementation Method 5
The third reflective surface may have a light diffusion part that diffuses light
Data Source
AI summary
A vehicle light guide body includes an incident surface that light from the light source enters, a first reflective surface that internally reflects the light that has entered from the incident surface to form nearly parallel light, a second reflective surface that internally reflects the light from the first reflective surface, a third reflective surface provided in a position located in front of the second reflective surface in a front-rear direction and in a portion in at least one of end faces in a left-right direction, a light shielding part that shields a part of the light reflected by the second reflective surface, and a light emitting surface that emits the light that has been internally reflected by the second reflective surface and has passed through the light shielding part to illuminate a headlight pattern in front of a vehicle.