Curved Light-Emitting Panel Sealing Against Moisture Damage
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Solution Overview
Problem
Light-emitting devices with electroluminescence (EL) elements are prone to deterioration due to external contaminants like moisture, which reduces their reliability and functionality.
Innovation Solution
A manufacturing process for light-emitting devices involves forming a light-emitting panel with a curved shape and applying a protective film to prevent moisture and impurities from entering, thereby enhancing the device's reliability and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light-emitting panel is processed into a curved shape after manufacturing the electrode layer and element layer, then the device can achieve complex shapes suitable for various applications, but the protective film may be damaged during shape processing
Solution Approach 1:
The protective film is formed on the light-emitting panel before the panel is processed into a curved shape. This preliminary formation of the protective film prevents damage during subsequent shape processing, as the film is already in place to protect the electrode layer and element layer when the panel is bent or curved.
2Reliability
If the protective film is formed before shape processing, then the film can protect the light-emitting elements, but the film may be damaged due to the stress of curving
Solution Approach 1:
A flexible sealing member is introduced as an intermediate layer between the light-emitting panel and the protective film. This flexible sealing member allows the assembly to be curved without causing stress concentration or damage to the protective film, as the flexible material can accommodate the bending while maintaining the integrity of the protective film.
3Reliability
If the light-emitting device is sealed to prevent moisture contamination, then reliability improves, but the manufacturing process becomes more complex
Solution Approach 1:
The flexible sealing member serves multiple functions: it seals the light-emitting elements to prevent moisture contamination, it provides flexibility to allow curving of the panel, and it supports the protective film during and after shape processing. This multi-functionality reduces the need for additional separate components, thereby simplifying the overall sealing structure despite the curved shape requirement.
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 proposed solution effectively prevents shape defects and contamination, resulting in a more reliable and versatile light-emitting device suitable for various applications with improved durability.
Implementation Method 1
the protective film which is a dense film blocks moisture or other impurities from the outside, and contamination of a light-emitting device can be efficiently prevented
Implementation Method 2
a light-emitting device having a light-emitting element (hereinafter also referred to as an EL element) exhibiting electroluminescence (hereinafter also referred to as EL)
Data Source
AI summary
An object of one embodiment of the present invention is to provide a more convenient highly reliable light-emitting device which can be used for a variety of applications. Another object of one embodiment of the present invention is to manufacture, without complicating the process, a highly reliable light-emitting device having a shape suitable for its intended purpose. In a manufacturing process of a light-emitting device, a light-emitting panel is manufactured which is at least partly curved by processing the shape to be molded after the manufacture of an electrode layer and/or an element layer, and a protective film covering a surface of the light-emitting panel which is at least partly curved is formed, so that a light-emitting device using the light-emitting panel has a more useful function and higher reliability.