Motorcycle Headlight Carrier Layout for Stable Light Distribution

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Solution Overview

Problem

Existing headlight designs for single-track vehicles, particularly motorcycles, suffer from high component count, reduced mechanical stability, and difficulty in replacing defective light elements due to separate filaments or semiconductor elements for position lights, which also limit light distribution adjustment.

Innovation Solution

The positioning of at least one low beam and one high beam light elements behind at least two position light elements on a light element carrier, combined with a transmissive and reflective optical element system, allows for adjustable and symmetrical light distribution, improved heat dissipation, and reduced heat transfer between elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate filament lamps or semiconductor light elements are used for position light, then position light function is achieved, but component count increases and mechanical stability decreases

Engineering Contradiction:
Improvemechanical stabilityVSAvoidcomponent count
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple light elements (low beam, high beam, and position light) onto a single lighting element carrier. This merging of previously separate components into one integrated unit reduces the overall component count, improves mechanical stability, and enhances the tightness of the headlight assembly while maintaining all required lighting functions.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The lighting element carrier serves as a universal platform that accommodates multiple types of light elements for different lighting functions (low beam, high beam, position light). This multi-functional design eliminates the need for separate mounting structures for each light element, thereby reducing component count and improving mechanical stability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Ease of repair

If multiple separate light elements are used, then all lighting functions are achieved, but replacing defective light elements becomes more difficult

Engineering Contradiction:
Improveease of replacing light elementVSAvoidcomponent count
Core Design Contradiction:
Ease of repairVSDevice complexity

Solution Approach 1:

By merging multiple light elements onto a single carrier unit, the patent creates a modular assembly that can be replaced as one unit. This significantly simplifies maintenance and repair operations, as technicians no longer need to handle and replace individual light elements separately, thereby improving ease of repair while maintaining all lighting functions.

Inventive Principle:
Principle #5Merging (Combining)

3Adaptability or versatility

If position light element is arranged in reflector area, then position light is achieved, but light distribution adjustment is limited

Engineering Contradiction:
Improvelight distribution adjustmentVSAvoidreflector configuration
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent positions the position light element on the front end region of the lighting element carrier, extending in the longitudinal direction, rather than arranging it within the reflector area. This spatial reconfiguration in a different dimension allows for flexible light distribution adjustment while simplifying the reflector design and eliminating the need for special reflector configurations.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 flexible light distribution, enhanced mechanical stability, easier maintenance, and reduced energy consumption by allowing independent adjustment of light elements and effective heat dissipation.

Implementation Method 1

a transmissive optical element is arranged around the at least two position light elements in the end region, by which the light distribution of the at least two position light elements can be influenced

Methodology Applied
Scientific EffectRefraction: Refraction

Implementation Method 2

a reflective optical element is arranged around the at least two position light elements in the end region, by which the light distribution of the at least two position light elements can be influenced

Methodology Applied
Scientific EffectReflection: Reflection

Implementation Method 3

the at least one low beam light element and the at least one high beam light element are arranged behind the at least two position light elements, in relation to the longitudinal direction, so that heat dissipation is improved and heat transfer between the light elements is reduced

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentEP4113000B1Illumination device for a motor vehicle headlight
Publication Date: 2025.09.03 KTM AG
  • EP4113000B1 patent drawingFigure 1a~1b
  • EP4113000B1 patent drawingFigure 2
  • EP4113000B1 patent drawingFigure 3a~3b

AI summary

Lighting device (12) for a headlight (13), in particular of a single-track vehicle, comprising a light element carrier (14) with a longitudinal direction (L), wherein at least one low beam light element (4), at least one high beam light element (5) and at least one position light element (6) are arranged on the light element carrier (14), wherein the at least one position light element (6) is arranged in an end region (15) of the light element carrier (14) that is forward with respect to the longitudinal direction (L), and wherein the at least one low beam light element (4) and the at least one high beam light element (5) are arranged behind the at least one position light element (6) with respect to the longitudinal direction (L).