LED Filament Headlight Plate Positioning for Glare Reduction
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Solution Overview
Problem
Conventional lighting technologies for automobiles fail to provide improved illumination as performance and range requirements change and/or increase, with limitations in glare reduction and figure of merit (FOM) for better visibility.
Innovation Solution
A headlighting system featuring a plate with at least two light emitting diode (LED) filaments configured at a specific reference position and distance from a reference plane, designed to reduce glare and enhance figure of merit (FOM) for improved illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional halogen lighting technologies are used, then the lighting system is simple and easy to manufacture, but the glare value is high and the figure of merit is insufficient
Solution Approach 1:
The patent changes the critical parameter of filament position distance from the reference plane. By positioning the LED filaments at a specific distance (e.g., 42.1mm) from the reference plane, the system achieves optimized beam performance with reduced glare and improved figure of merit, resolving the contradiction between illumination intensity and device complexity
Solution Approach 2:
The patent replaces conventional halogen filament positioning mechanisms with a precision-machined plate structure that incorporates reference planes and positioning features. This substitution enables more accurate and consistent filament positioning, achieving better beam performance without significantly increasing manufacturing complexity
2Illumination intensity
If conventional halogen lighting technologies are used, then the power consumption is high, but the illumination performance is insufficient
Solution Approach 1:
The patent optimizes the power consumption parameter by using LED technology with efficient driver circuits. The specific filament positioning (42.1mm from reference plane) ensures that the LED array achieves the required illumination performance with lower power consumption (20W-14W for LB/HB) compared to conventional halogen systems, simultaneously improving glare reduction and energy efficiency
3Illumination intensity
If the filament distance from the reference plane is increased, then the beam performance improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent introduces a precision-machined plate as an intermediary component that incorporates reference planes and positioning features. This plate serves as a mediator between the filament positioning requirement and the manufacturing process, providing precise geometric references (flat surfaces, positioned features) that enable accurate filament placement at the optimized distance (42.1mm) without excessively increasing manufacturing precision requirements
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 headlighting system achieves a glare range of 500 cd to 2,700 cd and FOM range of 90,000 cd to 300,000 cd, significantly improving upon conventional halogen lighting technologies by reducing power consumption from 20 W to 14 W for both low and high beams.
Implementation Method 1
at least two light emitting diode filaments configured on the plate at the reference position
Data Source
AI summary
A headlighting system is provided. The headlighting system includes a plate, a reference plane, a reference position for installation. The headlighting system includes light emitting diode filaments on the plate at the reference position. An edge of a first light emitting diode filament of the light emitting diode filaments is on the plate at a distance from the reference plane.