ADB Vehicular Lamp Lens Layout for Heat and Light Distribution
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Solution Overview
Problem
Existing vehicle lighting systems struggle to efficiently form and emit the challenges of existing ADB lighting devices in forming desired light distribution patterns while managing heat generation and avoiding interference from adjacent structures.
Innovation Solution
The ADB lighting device unit is configured with projection lenses arrayed in a right-left direction and light-emitting elements on the rearward side, emitting outgoing lights through the projection lenses in a forward direction, with inclined emission from one end to the other to avoid interference and heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light-emitting elements are disposed close to each other to form small light distribution patterns in parallel arrangement, then the ADB light distribution pattern can be formed, but heat generation of the light-emitting elements easily occurs
Solution Approach 1:
The ADB lighting device unit is divided into multiple projection lenses (first through fourth) arranged in a specific pattern, with each lens receiving light from dedicated light-emitting elements. This segmentation allows light-emitting elements to be spaced apart rather than clustered, reducing heat generation while still forming the required light distribution pattern through the combined output of multiple lenses
Solution Approach 2:
The projection lenses are arranged not only in the right-left direction but also in the up-down direction, creating a two-dimensional array configuration. This spatial arrangement in multiple dimensions allows light-emitting elements to be distributed more evenly throughout the device, increasing spacing between elements and improving heat dissipation while maintaining effective light distribution
2Temperature
If projection lenses are arrayed in right-left direction with light-emitting elements on rearward side, then light-emitting elements can be disposed away from each other to restrain heat generation, but outgoing light from end portion projection lens may be intercepted by adjacent structure
Solution Approach 1:
The projection lenses are arranged asymmetrically with respect to the light-emitting elements. Specifically, the first and second light-emitting elements are positioned to the right of their corresponding lenses, while the third and fourth light-emitting elements are positioned to the left. This asymmetric configuration causes the outgoing light from the first projection lens (at the left end) to incline toward the right, directing it away from adjacent structures and preventing interception
Solution Approach 2:
Each projection lens has a specifically optimized asymmetric shape tailored to its position in the array. The first projection lens has an asymmetric configuration that directs its outgoing light away from the center, while other lenses have different asymmetric characteristics suited to their locations. This local optimization ensures that light from each lens, particularly from end lenses, is directed appropriately without being intercepted by adjacent structures
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 the formation of desired light distribution patterns while effectively managing heat generation and interference, enabling efficient placement and balanced light distribution.
Implementation Method 1
emitting outgoing lights from the respective light-emitting elements through the respective projection lenses in the lighting-device forward direction
Data Source
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AI summary
A vehicle lighting device including an ADB lighting device unit can form an ADB light distribution pattern as a desired form while restraining heat generation of a plurality of light-emitting elements constituting the ADB lighting device unit. An ADB lighting device unit 20R is configured to emit outgoing lights from six light-emitting elements 22A to 22F through six projection lenses 32A to 32F in a lighting-device forward direction. On that occasion, outgoing light from the projection lens 32F positioned at a left end portion is emitted in a direction inclined to the side of a right end portion with respect to a lighting-device front direction. Thereby, a part of the outgoing light from the projection lens 32F is prevented from being intercepted by a low-beam lighting device unit 40R, even though the low-beam lighting device unit 40R is disposed at a left lateral vicinity of the ADB lighting device unit 20R. Thereby, the ADB light distribution pattern is formed as a desired form.