Foldable LED Sheet Assembly for Easy Power Linking

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Solution Overview

Problem

Existing LED lighting units for algae culture systems and plant/animal growth factories are difficult to connect easily, lacking efficient power transfer mechanisms and flexible attachment options.

Innovation Solution

An LED sheet with power receiving and feeding terminals, flexible wiring, and a foldable design, allowing easy connection and attachment to other LED sheets, with a substrate that supports a large area light source and flexible power distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If LED lighting units are connected by connecting circuit boards with connectors, then electrical continuity is established, but the connection process becomes complex and insulation of terminal portions is required

Engineering Contradiction:
Improveease of connectionVSAvoidconnection structure complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The LED lighting unit is divided into multiple detachable LED sheet modules, each with integrated terminals. This segmentation allows independent handling and connection of modules without complex circuit board assembly, simplifying the overall connection process while maintaining electrical continuity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The power receiving terminal and power feeding terminal are integrated directly onto the LED sheet substrate, merging the terminal functions with the lighting module itself. This eliminates the need for separate connector assemblies and circuit board connections, reducing structural complexity while enabling direct module-to-module connection.

Inventive Principle:
Principle #5Merging (Combining)

2Adaptability or versatility

If rigid circuit boards are used for LED arrangement, then electrical connections are stable, but flexibility in installation and attachment to various surfaces is reduced

Engineering Contradiction:
Improveinstallation flexibilityVSAvoidcircuit board rigidity
Core Design Contradiction:
Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The circuit board is replaced with a flexible substrate that can bend and conform to various surface geometries. This flexible substrate maintains electrical connectivity through printed circuits or conductive traces, enabling stable electrical connections while providing the necessary flexibility for diverse installation scenarios such as curved surfaces or irregular geometries.

Inventive Principle:
Principle #30Flexible shells and thin films

3Illumination intensity

If multiple LED chips are arranged on a large area substrate, then light distribution uniformity improves, but power consumption increases

Engineering Contradiction:
Improvelight distribution uniformityVSAvoidpower consumption
Core Design Contradiction:
Illumination intensityVSUse of energy by moving object

Solution Approach 1:

Different regions of the LED sheet are equipped with LEDs of different colors or intensities tailored to specific functional requirements. This local differentiation allows optimized light distribution for algae culture requirements without uniformly increasing power consumption across the entire substrate, as each region provides only the necessary illumination characteristics.

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

Facilitates easy and secure connection of LED sheets, enhances light distribution uniformity, reduces power consumption, and supports flexible installation on various surfaces, improving algae growth efficiency and system compactness.

Implementation Method 1

a plurality of LED chips 21 are mounted on the metal wiring portion 32

Methodology Applied
Scientific EffectLight-emitting diode (LED): Light Emitting Diode

Data Source

PatentEP4645397A1LED sheet, LED sheet assembly, and culture system
Publication Date: 2025.11.05 DAI NIPPON PRINTING CO LTD
  • EP4645397A1 patent drawingFigure 1
  • EP4645397A1 patent drawingFigure 2
  • EP4645397A1 patent drawingFigure 3

AI summary

An LED sheet (20) includes a substrate (31) that has a first surface (31a) and a second surface (31b) positioned on a side opposite to the first surface (31a), a metal wiring portion (32) positioned on the first surface (31a) of the substrate (31), a plurality of LED chips (21) mounted on the metal wiring portion (32), a power receiving terminal (61) connected to the metal wiring portion (32) and used for connection with another LED sheet (20), and a power feeding terminal (62) connected to the metal wiring portion (32) and used for connection with another LED sheet (20).