Vehicle Lamp Mirror Rotary Angle Reduction via 2D LED Array
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Solution Overview
Problem
Existing vehicle lamps require high-speed mirrors with large rotary angles to scan a wide area, which are expensive and difficult to control, and suffer from light distribution patterns appearing on the upper edge of the irradiation region due to diagonal mirror tilting.
Innovation Solution
A vehicle lamp design featuring a mirror that rotates around a vertical axis, with light-emitting elements arranged laterally and a lens that irradiates a wider range, allowing light distribution images to align along the vehicle width, reducing the need for large rotary angles and preventing light from appearing on the upper edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If light-emitting elements are disposed adjacent to each other to form a light-emitting region covering only the width of the irradiation region, then the number of light-emitting elements can be reduced, but the mirror must rotate at a large rotary angle and high speed which increases cost and control difficulty
Solution Approach 1:
The patent transitions from a one-dimensional arrangement (light-emitting elements arranged only in the vertical direction to cover the irradiation region width) to a two-dimensional arrangement (light-emitting elements arranged in both vertical and horizontal directions). This dimensional expansion allows the light-emitting region to be wider, reducing the mirror's rotary angle requirement while maintaining the same number of light-emitting elements, thereby resolving the contradiction between element quantity and mirror complexity
Solution Approach 2:
The patent segments the light-emitting region into multiple discrete light-emitting elements arranged in a grid pattern (vertical and horizontal directions) rather than using a continuous or densely packed single-direction arrangement. This segmentation allows for optimized spatial distribution that reduces the scanning angle requirement while utilizing the same number of elements efficiently
2Ease of manufacture
If the light source is disposed on the lower side in the vertical direction, then the light distribution pattern appears on the upper side toward the edge of the irradiation region due to diagonal mirror tilting
Solution Approach 1:
The patent adds horizontal dimension to the light-emitting element arrangement, creating a two-dimensional light-emitting region that extends beyond the mirror's vertical projection. This dimensional change allows the light distribution to be controlled more precisely, preventing concentration on the upper edge while maintaining ease of light source positioning
Solution Approach 2:
The patent creates non-uniform local density distribution of light-emitting elements, with different spacing arrangements in vertical and horizontal directions. This local quality variation optimizes the light distribution pattern to prevent concentration on the upper edge while maintaining manufacturing simplicity
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 suppresses the rotary angle of the mirror and prevents light distribution on the upper side of the irradiation region, enhancing control and reducing costs while maintaining effective illumination.
Implementation Method 1
a lens that irradiates a range wider than the mirror with light from the light-emitting elements
Implementation Method 2
light distribution images of the light reflected by the mirror surface
Data Source
AI summary
A vehicle lamp includes a mirror, a plurality of light-emitting elements, and a lens. The mirror is capable of rotating a mirror surface around a rotary axis in a vertical direction. The mirror surface extends along the rotary axis. The light-emitting elements are arranged on a lateral side more than the mirror in a vehicle width direction. The lens irradiates a range wider than the mirror with light from the light-emitting elements. The light-emitting elements are disposed apart from each other such that light distribution images of the light reflected by the mirror surface are aligned along the vehicle width direction. The mirror rotates to combine the adjacent light distribution images and form a main light distribution pattern.