Projection Headlight Reflective Surface Units Dark Zone Illumination
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Solution Overview
Problem
Conventional ellipsoidal reflector headlamps face challenges in achieving sufficient illuminance at the dark zone due to light refraction by curved housing walls, leading to potential safety hazards.
Innovation Solution
A projection headlight design incorporating a reflecting mirror with a mounting space defined by first, second, and third reflective surface units, along with a light shield and lens, to effectively reflect and project light beams, ensuring adequate illumination at the dark zone by adjusting the configuration of these reflective surface units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a stationary light shield with specific structure is used to reflect light and project light patterns, then light patterns (high beam and low beam) can be formed as required, but sufficient illuminance at the dark zone cannot be achieved due to light refraction by curved housing walls
Solution Approach 1:
The light shield is divided into multiple reflective surface units (first reflective surface unit, second reflective surface unit, third reflective surface unit) that are arranged in sequence. Each unit performs a specific reflection function, collectively achieving the desired light distribution and illuminance at the dark zone while maintaining structural manageability.
Solution Approach 2:
The patent introduces a multi-dimensional light path configuration by arranging reflective surface units at different spatial positions and orientations within the mounting space. This dimensional arrangement allows light to undergo multiple reflections from different angles, enabling sufficient illuminance at the dark zone without requiring complex curved housing structures.
2Adaptability or versatility
If the lamp housing is designed with many curved structures for aesthetic appearance and versatility, then aesthetic appearance and versatility are improved, but light beams are refracted by the curved housing wall and light patterns are adversely affected
Solution Approach 1:
The light shield acts as an intermediary optical element between the light source and the housing wall. By positioning the light shield in the mounting space with specifically oriented reflective surfaces, it mediates the light path to achieve desired illumination patterns before light interacts with the curved housing structures, thereby protecting light pattern quality while allowing aesthetic housing designs.
Solution Approach 2:
The reflective surface units are strategically positioned and oriented at specific locations within the mounting space to address local illumination requirements. This localized optical control ensures that critical light paths maintain their intended patterns regardless of the overall curved housing structure, allowing aesthetic versatility without compromising light quality.
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 illuminance at the dark zone, improving safety and flexibility in light pattern adjustment, even with curved lamp housing structures, while maintaining aesthetic appeal.
Implementation Method 1
a light beam that is reflected by the first reflective surface unit toward the second reflective surface unit
Implementation Method 2
reflected by the second reflective surface unit toward the third reflective surface unit
Implementation Method 3
projected forwardly through the lens
Data Source
AI summary
A projection headlight includes a reflecting mirror, a light shield, a reflector, a lens and a light emitting unit. The reflecting mirror includes a first reflective surface unit. The light shield is disposed in the reflecting mirror and includes a second reflective surface unit facing rearwardly. The reflector is disposed behind the light shield and includes a third reflective surface unit facing forwardly. The light emitting unit is disposed behind the light shield, and emits a light beam reflected by the first reflective surface unit toward the second reflective surface unit, and then reflected by the second reflective surface unit toward the third reflective surface unit to be projected forwardly through the lens.