Groove-Based Sealant Bonding for OLED Display Sealing
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Solution Overview
Problem
Traditional flat panel display devices face issues with moisture and oxygen exposure due to inadequate sealing, leading to performance degradation and short lifetimes, particularly in OLED displays.
Innovation Solution
The display device incorporates a base substrate and a cover plate bonded by a frame sealant with grooves containing a desiccant layer and a thermosensitive laser circuit, which increases the adhesive force and enhances sealing performance by emitting a laser to melt the inner wall of the groove when ambient temperature exceeds a preset value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional bonding method without groove is used, then manufacturing process is simple, but sealing performance is insufficient
Solution Approach 1:
The bonding region is segmented by introducing grooves that divide the sealant into multiple sections, increasing the effective bonding area and improving sealing performance without significantly complicating the overall structure
Solution Approach 2:
The groove structure adds a vertical dimension to the bonding interface, transforming a simple planar bond into a three-dimensional structure with increased surface area for sealing
2Reliability
If groove structure is added to improve sealing, then sealing performance is improved, but manufacturing complexity increases
Solution Approach 1:
The grooves are formed in advance on the substrate or cover plate before the sealant is applied, allowing for precise control of the bonding geometry and simplifying the overall manufacturing process despite the added structural complexity
3Reliability
If thermosensitive laser circuit is added, then sealing performance is enhanced, but device complexity increases
Solution Approach 1:
The thermosensitive laser circuit automatically activates when the temperature exceeds a preset threshold, causing the laser to melt and seal the groove without requiring external control systems or complex circuitry
Solution Approach 2:
The laser-induced melting of the groove material utilizes phase transition from solid to liquid and back to solid, creating a hermetic seal that enhances the overall sealing performance of the device
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 significantly improves the sealing performance of the display device, preventing moisture and oxygen ingress and extending the lifespan of OLED displays by increasing the contact area and adhesive force between the sealant and the substrate/cover plate.
Implementation Method 1
at least one thermosensitive laser circuit is disposed in the groove, the thermosensitive laser circuit emitting a laser for melting an inner wall of the groove when an ambient temperature exceeds a preset value
Implementation Method 2
the thermosensitive laser circuit emitting a laser for melting an inner wall of the groove
Implementation Method 3
The cover plate is bonded to the base substrate by a frame sealant
Data Source
AI summary
The present disclosure relates to a display device and a method of producing the same. In an embodiment, the display device includes: a base substrate; a cover plate opposite to the base substrate; and a first frame sealant, the cover plate is bonded to the base substrate at least by the first frame sealant, at least one groove is provided in a bonding region of at least one of the base substrate and the cover plate, and at least a part of the first frame sealant is disposed in the groove.