Vehicle Headlight Beam Overlap for Front Illuminance
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Solution Overview
Problem
Vehicle headlights with high installation positions on tall vehicles experience reduced illuminance in the immediate front area, leading to a psychological impression of insufficient brightness, which affects the commodity value and visibility.
Innovation Solution
A vehicle headlight configuration that includes a first low beam unit and a second high beam unit, where the high beam overlaps the low beam on the lower end and the additional low beam overlaps the low beam on the upper end, ensuring sufficient illuminance to the immediate front side by forming a continuous and enhanced light distribution pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the vehicle headlight is installed at a relatively high position on a tall vehicle, then the high beam can illuminate distant areas, but the illuminance at the immediate front side of the vehicle becomes low
Solution Approach 1:
The light distribution is segmented into multiple distinct patterns: high beam for distant illumination, first low beam for standard near-field illumination, and second low beam specifically for immediate front side illumination. This segmentation allows each beam type to be optimized for its specific function without compromising the others, resolving the contradiction by adding a dedicated second low beam pattern to illuminate the immediate front area while maintaining the existing high beam capability for distant areas
Solution Approach 2:
The patent introduces a new spatial dimension to the light distribution by adding the second low beam that illuminates a previously underlit zone (immediate front side). This creates a multi-layered illumination structure where high beam covers distant horizontal areas, first low beam covers intermediate areas, and second low beam fills the immediate front gap, effectively adding depth to the illumination coverage without increasing device complexity
2Illumination intensity
If the vehicle headlight is installed at a relatively high position on a tall vehicle, then the high beam structure is simplified, but the illuminance at the immediate front side becomes low causing psychological impression of insufficient brightness
Solution Approach 1:
The illumination task is divided into three separate functional segments: high beam for distant areas, first low beam for intermediate areas, and second low beam for immediate front side. This segmentation allows the control system to independently manage each beam type, making the overall system easier to manufacture and control while achieving comprehensive brightness coverage including the immediate front area that was previously dark
Solution Approach 2:
Each beam type is optimized with specific local quality characteristics: high beam for long-range penetration, first low beam for standard near-field coverage, and second low beam specifically tuned for immediate front side illumination. This local optimization ensures that each region receives appropriate brightness quality, improving overall brightness perception while maintaining manageable manufacturing complexity through specialized design
3Illumination intensity
If the high beam and low beam are completely separated without overlapping, then the light distribution is clean and distinct, but the illuminance coverage in transition zones becomes insufficient
Solution Approach 1:
The patent strategically merges the second low beam with the first low beam in the immediate front side region, creating overlapping coverage in this critical zone. This merging ensures continuous illuminance coverage without gaps, as the overlapping beams reinforce each other to provide sufficient brightness at the immediate front side, while maintaining distinct separation in other regions to preserve beam pattern clarity
Solution Approach 2:
The beam pattern structure applies different spatial relationships locally: complete overlap between second and first low beams in the immediate front region for enhanced coverage, partial overlap between high and first low beams in transition zones for smooth gradients, and clear separation in distant areas. This local differentiation optimizes illuminance coverage continuity where needed while maintaining clean beam patterns where separation is beneficial
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 configuration provides increased illuminance to the immediate front side of the vehicle, improving visibility and reducing the psychological impression of insufficient brightness, especially in low-light conditions, and enhancing the exterior design by maintaining a continuous light appearance.
Implementation Method 1
a light source 33 having a plurality of light emitting elements configured to generate light
Implementation Method 2
a lens 34 configured to form a high beam and an additional low beam by condensing and reverse-projecting the light emitted from these light emitting elements
Data Source
AI summary
To provide a vehicle headlight whose irradiation light is capable of ensuring sufficient illuminance to the immediate front side of the vehicle. A vehicle headlight irradiating light to the front of a vehicle including a first unit which generates light in order to form a first low beam, a second unit which generates light in order to form a high beam and a second low beam, where a portion of the high beam on the lower end side overlaps a portion of the first low beam on the upper side, and the other portion is formed above the first low beam without overlapping the first low beam, and where a portion of the second low beam on the upper side overlaps a portion of the first low beam on the lower side, and the other portion is formed below the first low beam without overlapping the first low beam.