Vehicular Headlamp Module with Dual Reflection Bodies
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Solution Overview
Problem
Existing vehicular headlamp technologies reduce glare against oncoming vehicles but often compromise lighting efficiency and illumination intensity for self-vehicles, leading to unclear cut-off lines and reduced road recognition.
Innovation Solution
A lighting structure for vehicular headlamps using two reflection bodies and a projection lens set, where light is reflected and refracted to enhance brightness in the self-direction while reducing glare by blocking light in the opposite direction, incorporating a light-blocking plate and heat dissipater to manage LED light effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shade or blocking plate is used to reduce glare against oncoming vehicles, then glare is reduced, but lighting efficiency and illumination intensity for self-vehicles deteriorates
Solution Approach 1:
The headlamp is divided into multiple functional zones using a multi-component light-shaping assembly including a reflector, shade, and projection lens. Each component segments the light path to perform specific functions: the reflector directs light forward, the shade blocks glare to oncoming vehicles, and the projection lens focuses illumination on the road, allowing simultaneous achievement of glare reduction and maintained illumination intensity
Solution Approach 2:
Different regions of the light distribution are given different qualities through the light-shaping components. The upper portion of the light beam is shaped to reduce glare for oncoming vehicles, while the lower portion maintains high illumination intensity for road recognition, creating localized optical properties that satisfy both requirements
2Object-affected harmful factors
If a protruding portion is added to block light and lower the cut-off line, then glare is reduced, but the cut-off line becomes unclear
Solution Approach 1:
A projection lens is introduced as an intermediary component between the light source and the road surface. This lens mediates the light distribution by focusing and shaping the beam, creating a precise and clear cut-off line while simultaneously controlling glare, thereby resolving the contradiction between glare reduction and cut-off line clarity
3Object-affected harmful factors
If an inclined plane is used to block light toward oncoming vehicles, then glare is reduced, but brightness in front of the driver is weakened too much
Solution Approach 1:
The light-shaping assembly creates different optical qualities in different spatial regions. The upper light beam is directed upward to reduce glare for oncoming vehicles, while the lower light beam maintains high intensity for road illumination in front of the driver, achieving localized optimization that resolves the contradiction between glare control and brightness maintenance
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 enhances light intensity in the self-direction, ensuring clear road recognition for drivers while complying with regulations by reducing glare and maintaining adequate illumination for oncoming vehicles, thus improving driving safety at night.
Implementation Method 1
the light emitted from the lighting element to the reflector is reflected to the projection lens set by the first reflection body
Implementation Method 2
uses reflection and refraction of light to project a light-distributed pattern on the front ground
Data Source
Figure 1
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AI summary
A lighting structure of a vehicular headlamp module includes a reflector (14), and a base (12) is located under the reflector and has a lighting element (24). A shade (16) is integrated at the base (12), and its central region has a shape of arc and protrudes toward the base and has a prominent point (162). A top of a first reflection body (18) located on one side of the prominent point (162) has a reflective inclined plane (182), which is located at the front end of the base (12) and in back of the shade (16). A second reflection body (20) has a light-blocking inclined plane (204), which is located at the front end of the base (12) and in front of the shade (16) and located at the other side of the prominent point (162). A projection lens (22) set is connected with the base. The light emitted from the lighting element is transmitted through, reflected to and refracted by the projection lens set to form a clear light-distributed pattern that reduces brightness and hence prevents from glare on the one side of the light-distributed pattern and enhances brightness on the other side of the light-distributed pattern.