Vehicle Headlight with Segmented LED-Lens Arrays for Thermal Management
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Solution Overview
Problem
Current vehicle headlamps using high-output LEDs face challenges in achieving high illumination while minimizing size and heat dissipation, leading to increased complexity and air resistance issues.
Innovation Solution
The design incorporates multiple lens units with varying light emitting devices and lenses arranged to face each other, allowing for controlled light distribution and reduced heat dissipation needs, with step differences between light emitting devices on a single substrate to enhance heat dissipation and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If one high-output LED is used to increase illumination, then illumination intensity is improved, but heat generation increases and device size increases
Solution Approach 1:
The patent divides the single high-output LED into multiple LEDs arranged in an array. Each LED emits light that is collected by a corresponding lens unit. This segmentation reduces the heat generation per LED while maintaining or improving total illumination output through the combined effect of multiple light sources.
Solution Approach 2:
The patent introduces lens units as intermediary elements between the LEDs and the external environment. Each lens unit is positioned to face a corresponding LED and serves as an optical mediator that directs and shapes the light output, improving illumination efficiency while allowing for better thermal management of each individual LED.
2Illumination intensity
If one high-output LED is used to increase illumination, then illumination intensity is improved, but device size increases
Solution Approach 1:
The patent segments the illumination system into multiple LED-lens unit combinations arranged in a compact array. This segmentation allows for more efficient space utilization compared to a single large LED, achieving high illumination output within a smaller overall device volume.
Solution Approach 2:
The patent merges multiple LED-lens unit assemblies into a single integrated headlamp structure. The lens units are arranged to face the LEDs in a coordinated manner, combining their individual light outputs to achieve high illumination intensity while maintaining a compact form factor suitable for vehicle installation.
3Temperature
If cooling mechanism is added to handle heat from high-output LED, then heat dissipation is improved, but device complexity increases
Solution Approach 1:
The patent segments the heat generation into multiple smaller LEDs rather than one large high-output LED. This segmentation inherently reduces the heat load per component, simplifying the cooling requirements. Each LED generates less heat, allowing for more manageable thermal management without complex cooling systems.
4Illumination intensity
If reflector size is increased for optical design, then light distribution quality is improved, but device size increases
Solution Approach 1:
The patent introduces lens units as optical intermediaries between the LEDs and the external environment. Each lens unit is positioned to face a corresponding LED and serves as an optical mediator that directs and shapes the light output. This approach achieves high-quality light distribution without requiring large reflector structures, as the lenses directly control the light paths from each LED.
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 enables a compact, high-quality light distribution system with improved heat dissipation and visibility, reducing light reflection and increasing efficiency and reliability of the headlamp.
Implementation Method 1
lenses arranged so as to face the respective plural light emitting devices
Data Source
AI summary
A headlight for a vehicle having good heat dissipation performance includes a plurality of lens units, each including a plurality of light emitting devices, and lenses arranged so as to face the respective plural light emitting devices. The plurality of light emitting devices include first light emitting devices arranged on an inner side of the vehicle and having a first light emitting area and second light emitting devices arranged on an outer side of the vehicle having a second light emitting area. A first light distribution emitted from first lens units having the first light emitting devices and a second light distribution emitted from second lens units having the second light emitting devices are included, and the second light emitting area is smaller than the first light emitting area as well as a range of the second light distribution is smaller than a range of the first light distribution.