Automotive Lamp with Segmented Beam Control
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Solution Overview
Problem
Conventional automotive lamps lack the ability to seamlessly switch between low-beam and high-beam modes while maintaining efficient light distribution and minimizing power consumption and heat generation.
Innovation Solution
The automotive lamp is designed with three distinct lamp units: a first unit illuminating a horizontal region with a horizontal cutoff line, a second unit illuminating an oblique region with an oblique cutoff line, and a third unit illuminating a region above the oblique cutoff line in high-beam mode, utilizing a translucent member with direct and total reflection controllers and diffusion lens elements to optimize light distribution and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single lamp unit is used to provide both low-beam and high-beam functions, then device complexity is reduced, but light distribution precision and beam pattern control deteriorate
Solution Approach 1:
The headlamp is divided into three independent lamp units (first, second, and third lamp units), each responsible for specific beam patterns. The first and second lamp units provide low-beam illumination with horizontal and oblique cutoff lines respectively, while the third lamp unit provides high-beam illumination above the oblique cutoff line. This segmentation enables precise control of light distribution for different driving conditions.
2Illumination intensity
If high light intensity is used to improve visibility in high-beam mode, then illumination intensity increases, but power consumption and heat generation increase
Solution Approach 1:
The third lamp unit is configured to illuminate only the region above the oblique cutoff line, concentrating light output where needed for high-beam functionality. This segmented approach allows high illumination intensity in the critical high-beam zone while avoiding unnecessary light output in other regions, thereby reducing overall power consumption and heat generation compared to a single full-intensity lamp unit.
3Manufacturing precision
If multiple lamp units are used to achieve precise beam patterns, then light distribution precision improves, but device complexity increases
Solution Approach 1:
Each lamp unit is designed with specific optical characteristics tailored to its function: the first lamp unit creates a horizontal cutoff line for left-side low-beam illumination, the second lamp unit creates an oblique cutoff line for right-side low-beam illumination, and the third lamp unit illuminates the region above the oblique cutoff line for high-beam. This local optimization of optical properties in each unit achieves precise overall beam pattern control.
4Area of stationary object
If light coverage is expanded to illuminate more regions, then illumination coverage increases, but light intensity per unit area decreases
Solution Approach 1:
The illumination space is divided into distinct regions handled by different lamp units: low-beam regions (below horizontal and oblique cutoff lines) are covered by the first and second lamp units, while the high-beam region (above the oblique cutoff line) is covered by the third lamp unit. This segmentation allows each unit to concentrate its light output on its designated region, maintaining high light intensity per unit area while collectively achieving comprehensive illumination coverage.
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 allows for efficient light distribution in both low-beam and high-beam modes, reducing power consumption and heat generation by adjusting light intensity and coverage, while maintaining consistent light patterns and minimizing unevenness.
Implementation Method 1
a total reflection controller configured to output light toward the front side of the lamp after the light incident to the translucent member is totally reflected
Data Source
AI summary
An automotive lamp includes a first lamp unit, a second lamp unit, and a third lamp unit. The first lamp unit illuminates a first region having its longitudinal direction in the horizontal direction and having its upper edge defining a horizontal cutoff line in the low-beam mode and the high-beam mode. The second lamp unit illuminates a second region having its longitudinal direction in an oblique direction inclined with respect to the horizontal direction and having its upper edge defining an oblique cutoff line in the low-beam mode and the high-beam mode. The third lamp unit illuminates a third region having its longitudinal direction in an oblique direction inclined with respect to the horizontal direction and having its lower edge parallel to the oblique cutoff line.