Leak Detection in OLED Displays: Patent-Based Solutions
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Summary
Problems
Organic light-emitting display apparatuses face reduced lifespan and reliability due to oxidation and water penetration, with existing detection methods struggling to precisely identify organic layer leaks between block structures, especially with concave-convex surface shapes.
Innovation solutions
The organic light-emitting display apparatus includes a substrate with a display area and peripheral area, featuring a pixel electrode, intermediate layer, opposite electrode, and conductive layers with specific block structures and an encapsulation structure comprising inorganic and organic layers, allowing precise detection of organic layer leaks through the use of openings in the conductive layers.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If organic layer leakage is not detected, then production efficiency is maintained, but reliability deteriorates due to oxygen and water penetration
Why choose this principle:
The flat reference layer is formed in advance during the manufacturing process, enabling subsequent automated optical inspection of organic layer leakage. This preliminary preparation allows for rapid, non-contact detection that can be integrated into the production line, maintaining high productivity while ensuring reliability by identifying leakage defects before final assembly
Principle concept:
If organic layer leakage is not detected, then production efficiency is maintained, but reliability deteriorates due to oxygen and water penetration
Why choose this principle:
The DIC microscope provides real-time feedback on organic layer leakage by detecting interference patterns in the peripheral area. This feedback mechanism enables immediate identification of defective products, allowing for quality control decisions to be made during manufacturing, thus maintaining both high productivity through automated inspection and reliability by preventing defective products from reaching customers
Application Domain
Data Source
AI summary:
The organic light-emitting display apparatus includes a substrate with a display area and peripheral area, featuring a pixel electrode, intermediate layer, opposite electrode, and conductive layers with specific block structures and an encapsulation structure comprising inorganic and organic layers, allowing precise detection of organic layer leaks through the use of openings in the conductive layers.
Abstract
An organic light-emitting display apparatus including: a substrate including a display area and a peripheral area at an outer side of the display area; a pixel electrode disposed in the display area of the substrate; a pixel-defining layer disposed on the pixel electrode and exposing at least a portion of the pixel electrode; an intermediate layer disposed on the pixel electrode; an opposite electrode disposed on the intermediate layer; a first conductive layer disposed in the peripheral area of the substrate and including at least one opening; a first block structure and a second block structure disposed on the first conductive layer and separated from each other with the at least one opening therebetween; and an encapsulation structure disposed on the opposite electrode in the display area and the peripheral area.