Tilted Vehicle Lamp Mounting Face with Rotated LED
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Solution Overview
Problem
Vehicle lamps experience a reduction in light distribution pattern formation precision when the light emitting element mounting face is tilted due to the shape of the vehicle, leading to inaccurate light projection and discomfort for drivers.
Innovation Solution
The vehicle lamp design includes a mounting face tilted such that each left-right direction end is at a different height, with light emitting elements positioned rotated about a reference axis orthogonal to their emitting face, ensuring precise light distribution pattern formation even when tilted, and utilizing a reflector to form a cut-off line with high precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the mounting face is tilted to adapt to the vehicle shape, then the adaptability to different vehicle installations is improved, but the light distribution pattern formation precision deteriorates
Solution Approach 1:
The patent applies parameter changes by rotating the light emitting element around a reference axis orthogonal to its light emitting face. This rotation adjusts the orientation of the light emitting face relative to the tilted mounting face, compensating for the tilt-induced distortion. By changing the angular parameter of the light emitting element's orientation, the system maintains precise light distribution pattern formation despite the mounting face being tilted to adapt to different vehicle shapes.
2Ease of manufacture
If the light emitting element is positioned in the reference position with light emitting face parallel to mounting face, then the ease of installation is improved, but the light distribution pattern precision deteriorates when mounting face is tilted
Solution Approach 1:
The patent modifies the installation parameter by rotating the light emitting element around the reference axis. Instead of simply placing the light emitting face parallel to the tilted mounting face, the element is rotated by a specific angle to compensate for the tilt. This parameter adjustment maintains installation simplicity (using the same reference position and axis) while achieving precise light distribution patterns despite the mounting face tilt.
3Manufacturing precision
If the light emitting face is rotated about the reference axis, then the light distribution pattern formation precision is improved, but the device complexity increases
Solution Approach 1:
The patent introduces asymmetry by rotating the light emitting element around the reference axis orthogonal to its light emitting face. This asymmetric positioning (rotating away from the symmetric reference position where the light emitting face would be parallel to the mounting face) compensates for the tilt-induced asymmetry in light distribution. The asymmetric rotation angle is specifically designed to counterbalance the mounting face tilt, thereby maintaining precise light patterns without requiring complex additional components.
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 design effectively suppresses the reduction in light distribution pattern precision due to tilting, maintaining accurate light projection and reducing driver discomfort by ensuring the cut-off line is formed correctly, enhancing visibility and reducing distortion.
Implementation Method 1
a reflector configured to reflect light of the light emitting element
Data Source
AI summary
A vehicle lamp includes an element installation portion including a mounting face, a light emitting element which is mounted on the mounting face and which includes a rectangular shaped light emitting face extending parallel to the mounting face, and a reflector configured to reflect light of the light emitting element. The mounting face is tilted such that each lamp left-right direction end is at a different height position. The light emitting element is mounted on the mounting face such that, with respect to a reference position where two sides of the light emitting face are parallel to a lamp front-rear axis and the other two sides of the light emitting face are perpendicular to a lamp front-rear axis, the light emitting face is positioned at a position rotated about a reference axis which is orthogonal to the light emitting face when the light emitting face is in the reference position.