Headlamp Optical Modules for Glare Reduction and Illumination
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Solution Overview
Problem
Current headlamp systems fail to consistently meet regulatory standards for illumination intensity and glare reduction, often resulting in poor ratings due to insufficient illumination and excessive glare, while also facing challenges in balancing aesthetic appeal with cost and technological requirements.
Innovation Solution
The headlamp system incorporates a low beam assembly with high luminance sources and a high beam assembly, featuring modules with short focal lengths, optimized lens heights, and unique optical configurations such as a 'kink' and 'flat' low beam modules, along with a high beam module, to generate specific luminous intensity distributions that meet regulatory standards and improve IIHS ratings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional headlamp systems are used, then manufacturing cost and simplicity are maintained, but illumination intensity and glare control fail to meet regulatory standards
Solution Approach 1:
The headlamp is divided into multiple independent optical modules, each with specific functions (low beam, high beam, cornering light). Each module contains optimized optical elements (lenses, reflectors, folders) that work together to achieve precise light distribution patterns required by regulatory standards.
Solution Approach 2:
Different regions of the headlamp emit light with different characteristics. The optical system creates specific luminous intensity distributions in different spatial zones (e.g., maximum intensity hot spot regions for illumination, controlled intensity zones for glare reduction), allowing each region to optimize its function locally.
2Shape
If lens height is reduced for aesthetic appeal, then vehicle design flexibility improves, but illumination performance deteriorates
Solution Approach 1:
The patent employs high luminance LED sources with significantly higher luminance (cd/mm²) compared to conventional products. This parameter change in source intensity compensates for the reduced lens height, allowing the optical system to achieve required illumination performance despite the compact form factor.
Solution Approach 2:
The optical modules integrate multiple optical elements (lenses, reflectors, folders) with different optical properties in composite arrangements. This allows the system to achieve complex light distribution patterns from compact configurations, maintaining performance despite reduced individual component sizes.
3Illumination intensity
If illumination intensity is increased to meet standards, then regulatory compliance improves, but glare to oncoming traffic increases
Solution Approach 1:
The optical system creates different luminous intensity distributions in different spatial zones. Maximum intensity hot spot regions are directed downward for road illumination, while controlled intensity zones manage upward and lateral light distribution to minimize glare to oncoming traffic and reduce overall system complexity.
Solution Approach 2:
Complex multi-element optical systems act as intermediaries between the light sources and the road environment. These optical elements (lenses, reflectors, folders) shape and control the light distribution, enabling the system to deliver high intensity where needed while filtering and directing light away from sensitive areas.
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 achieves improved illumination patterns that conform to regulatory standards, reducing glare and enhancing downroad visibility, thereby improving IIHS ratings while maintaining aesthetic appeal and cost-effectiveness.
Implementation Method 1
The at least one high luminance source is a high luminance light emitting diode
Data Source
AI summary
A headlamp assembly, an optical system and a method for generating a hybrid luminous intensity are provided. The headlamp includes a low beam assembly and a high beam assembly. The low beam assembly is configured to generate a low beam distribution. The low beam assembly includes a plurality of low beam modules including at least one high luminance source optically configured to emit a first luminous intensity distribution and at least one light source optically configured to emit a second luminous intensity distribution. The high beam assembly includes one or more high beam modules.