OLED Encapsulation Structure for Leakage Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light-emitting display apparatuses face challenges in detecting whether an organic layer has leaked out to the peripheral area, as existing methods like differential interference contrast microscopy struggle to distinguish between concave-convex shapes of layers and the organic layer, leading to difficulties in preventing oxygen and water penetration, which reduces the lifespan and reliability of the display.
Innovation Solution
The organic light-emitting display apparatus includes a substrate with a display area and a peripheral area, featuring a pixel electrode, pixel-defining layer, intermediate layer, opposite electrode, and conductive layers with specific block structures and an encapsulation structure. The method involves forming conductive layers with openings, block structures, and an encapsulation structure to precisely detect and prevent organic layer leakage, using a combination of inorganic and organic layers for effective encapsulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If organic layer leakage is not detected, then production efficiency is maintained, but reliability deteriorates due to oxygen and water penetration
Solution Approach 1:
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
Solution Approach 2:
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
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 solution allows for precise detection of organic layer leakage and reduces defect rates by ensuring the encapsulation structure effectively prevents external impurities from penetrating, thereby enhancing the lifespan and reliability of the organic light-emitting display apparatus.
Implementation Method 1
excitons, which are generated by holes injected from the hole injection electrode and electrons injected from the electron injection electrode being united in the organic emission layer, emit light by falling from an excited state to a ground state
Data Source
AI summary
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.