Vehicle Headlight Beam Shaper Structure for Precise Cutoff Lines
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Solution Overview
Problem
Existing vehicle headlights struggle to form precise low and high beam light distribution patterns without forming unintended dark or bright regions, and the beam shaper components are prone to deformation and misalignment, affecting the quality of the light distribution.
Innovation Solution
A vehicle headlight design featuring a beam shaper with a plate-shaped main member and reinforcing member, where the main member includes a base portion with a fixed reinforcing member, and a position regulating portion is integrated into the light guide member to maintain shape and alignment, preventing deformation and misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the beam shaper is thinned to reduce complexity, then the device complexity is reduced, but the base portion becomes easily deformed and cannot maintain predetermined shape
Solution Approach 1:
The beam shaper is segmented into a main member and a reinforcing member that are fixed together. The main member includes a base portion with a front end that does not overlap the reinforcing member, while another part overlaps and is fixed to the reinforcing member. This segmentation allows the beam shaper to be thinned overall while maintaining shape stability through the reinforcing member's support.
Solution Approach 2:
The beam shaper uses a composite structure combining the main member and reinforcing member as separate components. This composite approach allows the thin main member to maintain structural integrity through the reinforcing member, achieving both reduced complexity and maintained shape stability.
2Device complexity
If the beam shaper is thinned to reduce complexity, then the device complexity is reduced, but the front end cannot maintain predetermined shape
Solution Approach 1:
The beam shaper is segmented into a main member and a reinforcing member that are fixed together. The main member includes a base portion with a front end that does not overlap the reinforcing member, while another part overlaps and is fixed to the reinforcing member. This segmentation allows the beam shaper to be thinned overall while maintaining shape stability through the reinforcing member's support.
3Strength
If the reinforcing member overlaps the entire base portion, then the rigidity is improved, but the upper surface cannot reflect light to form cutoff line
Solution Approach 1:
The reinforcing member is positioned to overlap only specific parts of the base portion, not the entire base portion. This local reinforcement approach provides rigidity support where needed while leaving the upper surface of the base portion exposed to reflect light and form the cutoff line of the low beam light distribution pattern.
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 ensures precise formation of low and high beam light distribution patterns without unintended dark or bright regions, maintaining the shape of the beam shaper components and improving rigidity and alignment, resulting in improved light distribution quality.
Implementation Method 1
an upper surface of the base portion reflects a part of the first light toward the projection lens in such a way as to form a cutoff line of the low beam light distribution pattern
Data Source
AI summary
A vehicle headlight (1) includes: a first light emitting optical system (LE1) that emits first light (L1); a second light emitting optical system (LE2) that emits second light (L2); a projection lens (35); and a beam shaper (50), in which the beam shaper (50) includes a main member (110) and a reinforcing member (120) overlapping the main member (110), the main member (110) includes a base portion (53) having a part that includes a front end of the main member (110) and does not overlap the reinforcing member (120) and a part that overlaps the reinforcing member (120) and to which the reinforcing member (120) is fixed, and an upper surface of the base portion (53) reflects a part of the first light (L1) toward the projection lens (35) in such a way as to form a cutoff line (CL) of a low beam light distribution pattern (PL).