LED Filament Headlight Layout for Low-Glare Beam Performance
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Solution Overview
Problem
Conventional automobile lighting technologies fail to meet evolving performance and range requirements, characterized by high glare and limited visibility distance, with halogen HB1 devices having glare of 1,102.2 cd and FOM of 81,706 cd.
Innovation Solution
A headlighting system featuring a plate with two LED filaments positioned at specific distances from a reference plane, one for low beam and one for high beam, optimizing glare and FOM to 500-2,700 cd and 90,000-300,000 cd respectively, while reducing power consumption to 20 W-14 W.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional halogen lighting technologies are used, then the lighting system provides sufficient illumination, but the glare value is high (1,102.2 cd for HB1) and visibility distance is limited
Solution Approach 1:
The patent changes the physical parameters of the light source by using LED filaments with specific e values (42.8mm for low beam, 41.1mm for high beam) instead of conventional halogen filaments. This parameter change in filament position and LED technology fundamentally alters the light distribution pattern, achieving lower glare (500-2,700 cd) while maintaining or improving visibility distance (90,000-300,000 cd FOM)
Solution Approach 2:
The patent segments the lighting function by using separate LED filaments for low beam and high beam operations, each positioned at specific e values. This segmentation allows independent optimization of each beam type's light distribution characteristics, enabling simultaneous reduction of glare and improvement of visibility distance for different driving conditions
2Illumination intensity
If conventional halogen HB1 devices are used, then the lighting system provides adequate beam performance, but power consumption is high (65 W for low beam, 45 W for high beam)
Solution Approach 1:
The patent substitutes the halogen heating filament mechanism with LED electroluminescence technology. This replacement eliminates the need for high-power resistive heating, dramatically reducing power consumption while maintaining beam performance through optimized LED filament positioning at specific e values
3Adaptability or versatility
If conventional lighting technologies are used, then the system meets current performance requirements, but it cannot adapt to evolving performance and range requirements
Solution Approach 1:
The patent creates a dynamic lighting system where LED filaments can be selectively activated for low beam or high beam modes based on driving conditions. The specific e value positioning (42.8mm/41.1mm) enables flexible adjustment of light distribution patterns, allowing the system to adapt to evolving performance requirements while maximizing visibility distance
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
The system provides improved beam performance with lower glare and higher FOM, maintaining compatibility with existing automobiles at reduced manufacturing costs.
Implementation Method 1
at least two light emitting diode filaments configured on the plate at one or more reference positions
Data Source
AI summary
A headlighting system is provided. The headlighting system includes a plate. The headlighting system includes a reference plane. The headlighting system includes light emitting diode filaments. The light emitting diode filaments are on the plate. The light emitting diode filaments are on the plate at reference positions. The reference positions are set at distances from the reference plane.