OLED Sealant Barrier Layer Reduces Dead Space
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Solution Overview
Problem
Organic light-emitting display apparatuses face a limitation due to dead space created by the sealant, which restricts the expansion of the display region towards the edges of the apparatus.
Innovation Solution
The solution involves a barrier layer between the insulating layer and the sealant, allowing the sealant to overlap the insulating layer, reducing the dead space by positioning the sealant closer to the display area and using a barrier layer to protect the underlying components from heat damage during the sealing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a sealant is used to attach the upper and lower substrates, then the substrates are securely attached, but dead space is created in the region where the sealant is provided, preventing the display region from being expanded toward the edges
Solution Approach 1:
A barrier layer is introduced as an intermediary component between the sealant and the underlying structures. This barrier layer serves as a mediator that allows the sealant to be positioned closer to the display area while protecting the underlying components from heat damage, thereby reducing dead space without compromising attachment integrity
Solution Approach 2:
The barrier layer is formed in advance on the lower substrate before the sealant is applied. This preliminary action creates a protective surface that enables subsequent sealant placement closer to the display region, reducing dead space while ensuring that underlying components are already protected before heat-generating sealing operations occur
2Area of stationary object
If the sealant is positioned closer to the display area to reduce dead space, then the display region can be expanded, but the underlying components may be damaged by heat from the sealing process
Solution Approach 1:
The barrier layer acts as a protective intermediary between the heat-generating sealant and the underlying components. It absorbs or blocks heat during the sealing process, allowing the sealant to be positioned closer to the display area while preventing thermal damage to TFTs and other sensitive components
Solution Approach 2:
The barrier layer is formed beforehand to provide thermal protection to underlying components. This cushioning layer is positioned in advance to intercept heat from the sealant before it can reach and damage temperature-sensitive components during the sealing process
Data Source
AI summary
A method of manufacturing an organic light-emitting display apparatus includes preparing a lower substrate comprising a display area and a peripheral area surrounding the display area. A first thin film transistors (TFTs) is formed in the display area of the lower substrate. A first insulating layer is formed and disposed in the display area and at least a portion of the peripheral area of the lower substrate and that covers the first TFTs. Organic light-emitting diodes (OLEDs) are formed to be electrically connected to the first TFTs. A barrier layer is formed on at least a portion of the first insulating layer that is formed in the peripheral area of the lower substrate. A sealant is formed on the barrier layer such that at least a portion of the sealant overlaps the first insulating layer, and an upper substrate is sealed with the lower substrate.