Adaptive Front Light System Using Multi-Face LED Reflectors

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Solution Overview

Problem

Conventional adaptive front light systems for vehicles face challenges in manufacturing costs due to the need for motors and additional control equipment, and they often lack sufficient space for multiple reflectors required to form various beam patterns, limiting their functionality.

Innovation Solution

An adaptive front light system utilizing light-emitting diode (LED) lamp units with multi-face reflectors having cells of different curvature radii or focal points, allowing for the formation of various beam patterns by selectively turning on or off LED lamp units, and incorporating a light absorber to reduce glare.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If projection-type headlamps with motors and rotation axial members are used to achieve various beam patterns, then beam pattern versatility is improved, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvebeam pattern versatilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical rotation axial member and motor system with a fixed multi-face reflector structure. The various beam patterns are achieved by selectively activating different LED lamp units that correspond to different reflective faces, eliminating the need for mechanical movement while maintaining beam pattern versatility.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The reflector is divided into multiple independent faces with different curvature radii, each face designed to produce a specific beam pattern. Correspondingly, the LED lighting system is segmented into multiple independently controllable lamp units, allowing selective activation to achieve different beam patterns without mechanical movement.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If conventional reflector-type headlamps increase the number of reflectors to achieve various beam patterns, then beam pattern versatility is improved, but space requirements and device complexity increase

Engineering Contradiction:

Improvebeam pattern versatilityVSAvoidheadlamp space

Core Design Contradiction:

Adaptability or versatilityVSVolume of stationary object

Solution Approach 1:

Multiple reflector functions are merged into a single multi-face reflector structure. Different faces of the same reflector have different curvature radii and are designed to produce different beam patterns, consolidating what would traditionally require multiple separate reflectors into one integrated component.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The multi-face reflector serves multiple functions simultaneously - each face is designed to produce a specific beam pattern (e.g., high beam, low beam, cornering light). A single reflector structure with multiple faces replaces what would traditionally require multiple separate reflectors, reducing space requirements while maintaining beam pattern versatility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If conventional headlamps use motors to tilt or raise beams for AFLS functions, then beam adjustment capability is improved, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvebeam adjustment capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent replaces motor-driven beam tilting and raising mechanisms with a multi-face reflector system. Different beam directions and adjustments are achieved by selectively activating LED lamp units that correspond to different reflector faces, eliminating motors and complex control equipment while reducing manufacturing cost.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Adaptability or versatility

If LED lamp units with multi-face reflectors are used to generate various beam patterns, then beam pattern versatility is improved, but glare control becomes more challenging

Engineering Contradiction:

Improvebeam pattern versatilityVSAvoidglare

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

Each face of the multi-face reflector is designed with specific local optical properties - different curvature radii and reflective characteristics tailored to produce specific beam patterns. This localized optimization allows each reflector face to control light distribution appropriately for its intended function while minimizing glare in unwanted directions.

Inventive Principle:

Principle #3Local quality

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 effectively generates various beam patterns according to road and weather conditions while reducing manufacturing costs and improving glare management, meeting international luminous flux standards and enhancing driver visibility.

Implementation Method 1

a reflector which reflects light emitted from a light source forward

Methodology Applied

Scientific EffectLight reflection: Reflection

Implementation Method 2

reducing glare around an LED light source by using a light absorber

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS7690826B2Adaptive front light system using LED headlamp

Publication Date: 2010.04.06 SL LIGHTING

AI summary

Provided is an adaptive front light system (AFLS) for a vehicle. The AFLS comprising one or more light-emitting diode (LED) lamp units and a housing which accommodates the LED lamp units, wherein each of the LED lamp units comprises one or more LEDs as its light source and a reflector which reflects light emitted by the light source so that the reflected light can be directed forward, and said adaptive front light system is operable to form different beam patterns by selectively turning on or off the lamp units, and wherein one or more reflectors of the lamp units comprise a multi-face reflector including a plurality of cells having different curvature radiuses or focal points.