Fluorescent Micro Gap Detection in Flat Panel Display Sealing
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Solution Overview
Problem
Flat panel display devices, such as organic light-emitting display devices, are prone to damage from external factors like oxygen and moisture due to defects in the sealing structure's thin film, which can be minute and not immediately visible, leading to potential defects over time.
Innovation Solution
A flat panel display device with a sealing structure comprising alternating layers of inorganic and organic materials, including micro gaps filled with a fluorescent substance or dye, allowing for the detection of defects through ultraviolet illumination, enabling identification of micro gaps and determining the presence of defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a thin film sealing structure is used to achieve a thin profile and flexible characteristic, then the device becomes thinner and more flexible, but the sealing structure becomes easily damaged with minute defects that are not visible
Solution Approach 1:
The patent applies fluorescent substances or dyes to the sealing structure that change color or emit light under ultraviolet illumination. This allows minute defects in the thin film sealing structure to be visually detected, resolving the contradiction between using thin films for flexibility and maintaining reliable defect detection for sealing integrity.
2Ease of manufacture
If the sealing structure is made as a thin film, then the profile is thin and flexible, but minute damage may occur during processing that is not visible
Solution Approach 1:
The fluorescent substance or dye incorporated in the sealing structure emits light under ultraviolet illumination, causing micro gaps to become visually detectable. This resolves the contradiction between maintaining ease of manufacture with flexible thin films and improving the detectability of processing defects.
3Productivity
If minute damage to the thin film is not detected, then production continues, but the damage forms a penetration path for external moisture and oxygen over time
Solution Approach 1:
The patent incorporates fluorescent substances or dyes in the sealing structure during manufacturing, enabling preliminary detection of micro gaps before they become penetration paths for moisture and oxygen. This resolves the contradiction between maintaining high productivity and ensuring long-term reliability by allowing defect detection at an early stage.
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 solution effectively identifies and determines the existence and position of micro gaps in the sealing structure, ensuring the integrity of the flat panel display device by detecting potential defects early, thus preventing moisture and oxygen penetration.
Implementation Method 1
the micro gap includes an identification material including a fluorescent substance or a dye
Data Source
AI summary
A flat panel display device is provided. The flat panel display device includes: a display unit on a substrate; and a sealing structure on the substrate covering the display unit to seal the display unit, the sealing structure including at least one first layer including an inorganic material and at least one second layer including an organic material. The sealing structure includes at least one micro gap, and the micro gap includes an identification material including a fluorescent substance or a dye.