Organic EL Illumination Device Tab Connection Automation

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Solution Overview

Problem

Conventional organic EL illumination devices face challenges in automation of connection work, high skill requirements for soldering anode and cathode terminal electrodes, potential for glass substrate chipping during ultrasonic soldering, thick lead wires needed for high current supply leading to bulkiness, safety risks from exposed sharp edges, and high likelihood of short circuits due to thin protective films.

Innovation Solution

The use of a frame-shaped wiring board with anisotropic conductive film or paste for thermo compression bonding, eliminating the need for manual soldering, reducing lead wire thickness, and incorporating a resin frame or heat distribution plate to enhance safety and prevent short circuits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If soldering method is used to connect anode and cathode terminal electrodes, then electrical connection is achieved, but automation is difficult and high skill requirement is needed

Engineering Contradiction:

Improveautomation of connection workVSAvoidskill requirement for soldering

Core Design Contradiction:

Extent of automationVSEase of manufacture

Solution Approach 1:

The patent replaces the manual soldering process with a tab connection structure that can be automatically assembled. The tab connects the anode and cathode terminal electrodes through mechanical means (adhesive bonding or insertion) rather than requiring skilled soldering operations, enabling automation of the connection work while maintaining electrical connectivity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If ultrasonic soldering is used to connect terminal electrodes, then electrical connection is achieved, but glass substrate chipping occurs

Engineering Contradiction:

Improveconnection efficiencyVSAvoidglass substrate chipping

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a tab as an intermediary component between the anode and cathode terminal electrodes. This tab absorbs the mechanical stress and connection forces, preventing direct transmission of ultrasonic vibration energy to the glass substrate that would cause chipping. The tab acts as a buffer that enables connection without harmful effects on the substrate.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Power

If thick lead wires are used to supply high current, then sufficient current supply is achieved, but device becomes bulky

Engineering Contradiction:

Improvecurrent supply capabilityVSAvoiddevice thickness

Core Design Contradiction:

PowerVSVolume of moving object

Solution Approach 1:

The patent merges multiple functions into the tab structure: it serves as both the electrical connection element and the current conduction path. By integrating the current supply function into the tab rather than using separate thick lead wires, the design achieves high current capability while minimizing the volume occupied by connection components, thus reducing device bulkiness.

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If thin protective film is used to prevent oxygen and water intrusion, then sealing performance is improved, but short circuit likelihood increases

Engineering Contradiction:

Improvesealing performanceVSAvoidshort circuit risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the protective function into multiple layers: the thin protective film provides oxygen and water barrier, while additional insulating structures (such as insulating films or air gaps) are introduced to provide electrical insulation. This segmentation allows the thin film to maintain sealing performance while the added insulating elements prevent short circuits between adjacent electrodes.

Inventive Principle:

Principle #1Segmentation

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 approach enables automation of connection work, improves productivity, reduces the risk of glass substrate chipping, allows for thinner and more compact devices, and significantly decreases the likelihood of short circuits, thereby enhancing safety and yield.

Implementation Method 1

a frame-shaped wiring board with anisotropic conductive film or paste for thermo compression bonding

Methodology Applied

Scientific EffectThermo compression bonding:

Data Source

PatentEP2566298B1Organic el illumination device

Publication Date: 2018.06.06 LUMIOTEC

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AI summary

Disclosed is an organic EL illumination device-which is provided with: an organic EL element (13) on a glass substrate (10); and a plurality of anode terminal electrodes (11) and cathode terminal electrodes (12) for evenly supplying current to the aforementioned organic EL element (13) on the aforementioned glass substrate (10)-wherein the organic EL illumination device is provided with a wiring board (1) to which a circuit having anode wiring (1a) corresponding to the position of each of the aforementioned anode terminal electrodes (11), and a circuit having cathode wiring (1b) corresponding to the position of each of the aforementioned cathode terminal electrodes (12) are formed.