Vehicular Headlight Shade Reflection Surfaces
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Solution Overview
Problem
Conventional vehicular headlamps require large reflectors to effectively distribute low and high beams, leading to increased size and complexity, and struggle to maintain clear light distribution patterns without dark portions.
Innovation Solution
A vehicular headlight design featuring a first and second light emitting element with obliquely directed emission surfaces, a shade with reflection surfaces, and a projection lens that allows direct passage of light without the need for large reflectors, optimizing light distribution and reducing size through precise arrangement and surface features on the shade and projection lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a large reflector is used to effectively distribute low and high beams, then light distribution is improved, but the headlight size increases
Solution Approach 1:
The patent extracts and eliminates the large reflector component from the headlight system. Instead of using a reflector to distribute light, the invention uses a shade with reflection surfaces positioned between the light emitting elements and the projection lens to achieve light distribution, thereby reducing the overall headlight volume while maintaining effective light distribution for both low and high beams
Solution Approach 2:
The patent changes the spatial arrangement by positioning the shade with reflection surfaces in a different dimensional location - between the light emitting elements and the projection lens rather than using a traditional reflector geometry. This dimensional repositioning allows effective light distribution without requiring the large volume of a conventional reflector structure
2Illumination intensity
If a large reflector is used to effectively distribute low and high beams, then light distribution is improved, but the device complexity increases
Solution Approach 1:
The patent removes the complex large reflector structure from the system and replaces it with a simpler shade assembly containing reflection surfaces. This extraction of the problematic component directly reduces device complexity while the shade's reflection surfaces continue to provide effective light distribution for both low and high beams
Solution Approach 2:
The patent merges the functions of light blocking and light distribution into a single shade component with integrated reflection surfaces. This consolidation eliminates the need for separate large reflectors and other complex structural elements, thereby simplifying the overall headlight device while maintaining effective light distribution
3Volume of moving object
If conventional light sources are used, then the headlight can be compact, but dark portions appear in the light distribution pattern
Solution Approach 1:
The patent applies local quality by positioning different reflection surfaces on the shade at specific locations to control light distribution in different regions. The first reflection surface and second reflection surface are strategically placed to direct light to specific areas, ensuring uniform illumination without dark portions while maintaining a compact headlight structure
Solution Approach 2:
The shade with its reflection surfaces acts as an intermediary component between the light emitting elements and the projection lens. This intermediary structure carefully mediates the light paths, ensuring that light is properly distributed to eliminate dark portions in the final light distribution pattern while allowing the headlight to remain compact
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 design enhances luminous intensity and irradiation range for both low and high beams, suppresses the formation of dark portions in the light distribution pattern, and prevents the headlight from becoming overly large, while maintaining clear cut lines and reduced brightness irregularities.
Implementation Method 1
an upper surface of the shade has a first reflection surface that reflects another part of the first light so that the another part of the first light passes through the projection lens
Implementation Method 2
a lower surface of the shade has a second reflection surface that reflects another part of the second light so that the another part of the second light passes through the projection lens
Implementation Method 3
a projection lens that is arranged forward from the shade, and through which part of the first light and part of the second light directly pass
Data Source
AI summary
A vehicular headlight includes: a first light emitting element (55) that emits a first light (L1); a second light emitting element (63) that emits a second light (L2); a shade (43); and a projection lens (20), in which an upper surface of the shade (43) has a first reflection surface (43a) that reflects another part of the first light (L1) to the projection lens (20) side, and a lower surface of the shade has a second reflection surface (43b) that reflects another part of the second light (L2) to the projection lens (20) side, and a front end (43c) of the shade (43) has a step (43cs) in an up and down direction corresponding to a shape of a cut line of a light distribution pattern of the low beam.