Automotive Lighting Apparatus Lens Segmentation for High Beam Visibility
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Solution Overview
Problem
Conventional lighting apparatuses with low beam light-distribution pattern forming components in the base obstruct high beam light emission, leading to insufficient forward visibility when the low beam component is present.
Innovation Solution
The lighting apparatus design includes a refractive portion in the lower part of the lens body and a non-refractive portion in the upper part, with the first light-emitting device for low beam use positioned behind the refractive portion and the second light-emitting device for high beam use further forward and behind the non-refractive portion, allowing the low beam light-distribution pattern forming component to be positioned in front of the first light-emitting device without affecting the high beam light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the low beam light-distribution pattern forming component is disposed in the base in front of the first light-emitting device and second light-emitting device, then oncoming vehicles are not dazzled and sidewalk checking is facilitated, but the low beam light-distribution pattern forming component causes a dark streak in the light emitted from the second light-emitting device for high beam-use
Solution Approach 1:
The lens body is divided into two distinct portions: a refractive portion in the lower area and a non-refractive portion in the upper area. This segmentation allows different optical treatments for low beam and high beam light paths, enabling the low beam pattern forming component to function without interfering with high beam illumination.
Solution Approach 2:
Different portions of the lens body are assigned different optical properties: the lower portion has refractive characteristics to guide low beam light, while the upper portion has non-refractive characteristics to allow high beam light to pass without creating dark streaks. This local differentiation resolves the contradiction between preventing dazzle and maintaining visibility.
2Illumination intensity
If the second light-emitting device for high beam-use is disposed behind the lens body to improve forward visibility, then visibility is improved when oncoming vehicles are not present, but the low beam light-distribution pattern forming component causes a dark streak in the emitted light
Solution Approach 1:
The lens body is segmented into refractive and non-refractive portions, with the non-refractive portion positioned in the upper area where high beam light passes through. This eliminates the dark streak problem while maintaining the high beam's visibility-improving function.
Solution Approach 2:
The non-refractive portion of the lens body acts as an intermediary element that allows high beam light to pass through without being affected by the low beam light-distribution pattern forming component, thereby preventing dark streak formation while maintaining illumination intensity.
3Object-affected harmful factors
If the first light-emitting device for low beam-use is disposed behind the lens body, then the low beam light-distribution pattern forming component can block light toward oncoming vehicles, but the component obstructs light from the second light-emitting device
Solution Approach 1:
The lens body is divided into functional zones: the lower refractive portion handles low beam light from the first light-emitting device, while the upper non-refractive portion handles high beam light from the second light-emitting device. This spatial segmentation allows both functions to coexist without interference.
Solution Approach 2:
The solution moves from a single-plane arrangement to a multi-dimensional spatial configuration, positioning light-emitting devices at different depths (first device behind lens body, second device further forward) and assigning different vertical zones of the lens body to different functions, thereby resolving the obstruction problem.
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
This configuration enhances visibility during high beam light-distribution pattern illumination by preventing interference from the low beam light-distribution pattern forming component, ensuring improved forward visibility even when equipped with a low beam component.
Implementation Method 1
a refractive portion is provided in a lower portion of the lens body
Implementation Method 2
a non-refractive portion is provided in an upper portion of the lens body
Data Source
AI summary
A lighting apparatus includes: a base that is open toward a front and includes a low beam light-distribution pattern forming component; a lens body disposed forward of the base; a first light-emitting device; and a second light-emitting device. A refractive portion is provided in a lower portion of the lens body, and a non-refractive portion is provided in an upper portion of the lens body. The first light-emitting device is disposed behind the refractive portion of the lens body, the second light-emitting device is disposed further forward than the first light-emitting device and behind the non-refractive portion of the lens body, and the low beam light-distribution pattern forming component is disposed in front of the first light-emitting device.