Spiral LED Rod Lighting for Smooth Decorative Light Gradients

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Solution Overview

Problem

Current lighting systems struggle to create a smooth light gradient for mimicking natural lighting effects, are complex, and require tedious tuning to achieve desired decorative effects.

Innovation Solution

A lighting arrangement featuring a translucent optical element and spirally arranged LEDs, which refract light to produce a smooth gradient and decorative effects, eliminating the need for complex tuning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If current lighting systems are used to create decorative lighting effects, then lighting effects can be produced, but the light gradient is not smooth and the reproduction of natural phenomena is inaccurate

Engineering Contradiction:
Improvelight gradient smoothnessVSAvoidreproduction accuracy of natural phenomena
Core Design Contradiction:
Manufacturing precisionVSReliability

Solution Approach 1:

The lighting system is segmented into multiple individually controllable LED elements arranged in a specific geometric pattern. This segmentation allows independent control of each LED's intensity and color, enabling precise creation of smooth light gradients and accurate reproduction of natural lighting phenomena through coordinated control of individual segments.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different regions of the lighting system are assigned different functional qualities - certain LED groups are optimized for specific color temperatures or intensity ranges to match different parts of natural phenomena (e.g., warmer tones for horizon areas, cooler tones for upper sky regions). This local optimization enables accurate reproduction of natural lighting variations.

Inventive Principle:
Principle #3Local quality

2Manufacturing precision

If complex lighting arrangements are used to achieve smooth light gradients, then lighting quality improves, but system complexity and tuning difficulty increase

Engineering Contradiction:
Improvelight gradient smoothnessVSAvoidsystem structure complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The lighting system employs a curved or circular arrangement of LED elements rather than linear configurations. This geometric curvature naturally distributes light sources along an arc, creating smooth gradients through the spatial distribution alone, thereby achieving high lighting quality without requiring complex control mechanisms or extensive tuning.

Inventive Principle:
Principle #14Spheroidality (Curvature)

Solution Approach 2:

The patent transitions from conventional two-dimensional planar LED arrangements to a three-dimensional spatial configuration, utilizing vertical stacking and radial distribution of LED elements. This dimensional expansion allows smooth light gradient generation through spatial geometry rather than complex intensity modulation, simplifying the control system while maintaining high lighting quality.

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

3Ease of operation

If conventional LED arrangements are used, then basic illumination is achieved, but tedious tuning is required to create desired decorative effects

Engineering Contradiction:
Improveoperational convenienceVSAvoidtuning time
Core Design Contradiction:
Ease of operationVSLoss of time

Solution Approach 1:

The lighting system is pre-configured with LED elements arranged in optimal geometric patterns and pre-programmed with control algorithms that automatically generate desired lighting effects. This preliminary setup eliminates the need for extensive on-site tuning, allowing users to achieve professional decorative lighting effects immediately upon installation with minimal adjustment.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system incorporates automatic control mechanisms that self-regulate the lighting output based on pre-set parameters and environmental conditions. The LEDs and control system work autonomously to maintain optimal lighting gradients and effects without requiring continuous manual intervention or tuning, significantly reducing operational effort and time investment.

Inventive Principle:
Principle #25Self-service

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 arrangement provides aesthetically pleasing and decorative lighting effects by reproducing natural phenomena with ease, avoiding complex operations and ensuring a smooth light gradient.

Implementation Method 1

The LEDs are arranged to emit said light through the optical element for being influenced, i.e. refracted, by the optical element upon passage of the light through the optical element.

Methodology Applied
Scientific EffectRefraction: Refraction

Data Source

PatentEP4508368B1Lighting arrangement for decorative lighting
Publication Date: 2026.01.28 SIGNIFY HOLDING BV
  • EP4508368B1 patent drawingFigure 1
  • EP4508368B1 patent drawingFigure 2
  • EP4508368B1 patent drawingFigure 3a~3b

AI summary

A lighting arrangement (100), comprising an optical element (110) in the form of a rod comprising a translucent material, wherein the optical element elongates along a first axis, A. The lighting arrangement further comprises at least one array (120) of light emitting diodes (130), LEDs, wherein each array of the at least one array of LEDs comprises at least two adjacently arranged rows (150) of LEDs. Each row of LEDs comprises sequentially arranged LEDs configured to emit light being of the same color in the row, the color being different to a color of the light configured to be emitted by the LEDs of any of the other rows. Each array of the at least one array of LEDs is arranged on an outer surface (160) of the optical element and arranged in a spiral shape around the optical element.