Light Guide Exit Surface Sizing for Headlight Luminosity
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Solution Overview
Problem
Conventional vehicle headlights experience luminosity insufficiency and resolution issues in the central region of the illuminable area when projecting light, while desiring increased luminosity and resolution in both central and peripheral regions.
Innovation Solution
An illumination device comprising a substrate with multiple light sources and a light guide system where the size of the light exit surface differs between central and peripheral regions, guiding light from each source to enhance luminosity and resolution in specific areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If light from the light source substrate is projected through a projector lens, then the illuminable region is expanded, but luminosity insufficiency occurs in the central region and resolution in the central region becomes insufficient
Solution Approach 1:
The patent applies local quality by making the light exit surfaces of the light guides have different sizes based on their position. Central region light guides have smaller light exit surfaces to concentrate light and improve luminosity, while peripheral region light guides have larger light exit surfaces to expand the illuminable region. This non-uniform design resolves the contradiction between expanding the illuminable region and maintaining luminosity in the central region.
2Area of stationary object
If light from the light source substrate is projected through a projector lens, then the illuminable region is expanded, but resolution in the central region becomes insufficient
Solution Approach 1:
The patent improves resolution in the central region by using smaller light exit surfaces for central light guides, which concentrates the light and reduces the illumination spot size. This local optimization of light guide exit surface dimensions enhances the resolution in the central region while the overall system maintains an expanded illuminable region through larger peripheral light guides.
3Device complexity
If uniform light guides are used for all light sources, then the structure is simple, but luminosity and resolution cannot be optimized in specific regions
Solution Approach 1:
The patent resolves the contradiction between structural simplicity and luminosity optimization by implementing local quality differentiation. The light guides are structured with varying exit surface sizes according to their positional requirements - smaller for central regions to enhance luminosity, larger for peripheral regions to expand coverage. This targeted differentiation optimizes luminosity where needed while maintaining reasonable structural complexity.
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 effectively increases luminosity and resolution in both central and peripheral regions of the illuminable area, reducing luminosity and resolution insufficiencies, thereby improving visibility for drivers and reducing accident risks.
Implementation Method 1
a light guide provided at a light emission side of the plurality of light sources, wherein the light guide includes a plurality of light guides corresponding to the plurality of light sources
Data Source
AI summary
An illumination device, a headlight, and a movable body are provided which can increase luminosity and resolution at a central region or a peripheral region in an illuminable region. A primary lens is placed at a light emission side of a plurality of light sources, and the primary lens includes a plurality of light guides corresponding in a one-to-one relationship to the plurality of light sources. A size of a light exit surface of a light guide corresponding to a light source which illuminates a central region in the illuminable region of the headlight is set to differ from a size of a light exit surface of a light guide corresponding to a light source which illuminates a peripheral region surrounding the central region.