Vehicle Lamp Lens Stepped Reflecting Segments Glare Control
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Solution Overview
Problem
Conventional vehicle lamps with vacuum-coated reflecting seats face material limitations due to high temperature requirements, leading to uneven reflecting surfaces, optical precision issues, and increased light loss, while existing collimator lenses cause glare with residual light above the cut-off line.
Innovation Solution
A lamp lens with a light input surface, output surface, and reflecting surface featuring multiple reflecting segments and optical structures that prevent total reflection, allowing light to exit uniformly and reducing glare by controlling the light's path and cut-off line position through stepped surfaces and textured structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a vacuum coating process is used to form the reflecting surface, then the reflectivity is improved, but the manufacturing precision deteriorates due to uneven reflecting surface
Solution Approach 1:
The patent replaces the vacuum coating process with a molding process that forms the reflecting surface directly on the lamp lens. This substitution eliminates the unevenness caused by vacuum coating while maintaining high reflectivity through the molded optical structures.
Solution Approach 2:
The patent changes the physical state and formation method of the reflecting surface from a deposited coating layer to a molded structural feature. By forming the reflecting surface as an integral part of the lens during molding, the surface uniformity is significantly improved while preserving the optical reflection function.
2Measurement precision
If a collimator lens is used to guide light through TIR, then the optical precision is improved, but object-generated harmful factors worsen due to residual light causing glare
Solution Approach 1:
The patent divides the reflecting surface into multiple reflecting segments with different orientations. This segmentation allows different portions of light to be reflected at different angles, enabling precise control over the light distribution pattern and eliminating residual light that causes glare.
Solution Approach 2:
The patent applies different reflecting segment configurations to different regions of the lamp lens. By tailoring the orientation and shape of reflecting segments in specific areas, the light distribution is optimized locally to prevent glare while maintaining overall optical precision.
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 lamp lens design enhances optical precision, reduces light loss, and minimizes glare by ensuring light is projected below the cut-off line, improving driving safety and compliance with local regulations.
Implementation Method 1
Light that enters such lamp lens will exit through a light output surface of the lamp lens after undergoing total internal reflection (TIR)
Implementation Method 2
The optical structures are adapted to prevent total reflection of a portion of the light
Data Source
AI summary
A lamp lens is adapted to transmit light, and includes spaced-apart light input and output surfaces and a reflecting surface. The light input surface has a surrounding surface portion and an end surface portion connected to a front end of the surrounding surface portion. The reflecting surface extends from the light input surface to the light output surface, and has a plurality of reflecting segments and optical structures. The reflecting segments are adapted for total reflection of a portion of the light which enters the lamp lens through the light input surface. Each adjacent two of the reflecting segments forma stepped surface structure. The optical structures are adapted to prevent total reflection of a portion of the light.