OLED Panel Anti-Moisture Unit for Narrow Bezel Protection
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Solution Overview
Problem
In organic light emitting display panels using face seal technology, moisture permeation through interface imperfections or defects in the non-display area, particularly the bezel area, shortens the device's lifetime due to higher probability of moisture ingress, especially when implementing narrow bezel configurations.
Innovation Solution
An anti-moisture unit is formed on the planarization layer to cover the non-display area, and a second bank is disposed between the non-display and display areas, with an anti-moisture unit covering the planarization layer and second bank to suppress moisture permeation, using an inorganic material for enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If face seal technology is used to minimize moisture permeation, then device protection is improved, but moisture permeation through interface imperfections in the non-display area increases
Solution Approach 1:
The patent divides the sealing structure into multiple segments: the face seal layer covering the display area, and additional anti-moisture films covering the non-display area and bezel region. This segmentation allows each layer to address specific moisture permeation paths independently, with the face seal providing primary protection and the anti-moisture films providing extended protection to previously vulnerable interface regions.
Solution Approach 2:
The patent extends the moisture barrier protection from the two-dimensional display area into the third spatial dimension by adding vertical layers of anti-moisture films that cover the bezel and non-display areas. This dimensional extension creates multiple barrier layers at different depths, effectively blocking moisture permeation paths that would otherwise bypass the face seal through interface imperfections.
2Shape
If the non-display area is reduced for narrow bezel configuration, then device aesthetics are improved, but moisture permeation probability increases
Solution Approach 1:
The patent applies different moisture barrier properties to different regions: the face seal layer provides protection in the display area, while additional anti-moisture films provide enhanced protection in the non-display area and bezel region. This local differentiation of barrier properties ensures that even when the non-display area is minimized for narrow bezels, the critical interface regions maintain adequate moisture protection through targeted anti-moisture film placement.
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 configuration effectively reduces moisture permeability, extending the lifetime of the organic light emitting display panel and enabling stable narrow bezel implementations by protecting the panel from external moisture, thereby enhancing the overall durability and performance.
Implementation Method 1
moisture permeation path R which starts from a side surface of the passivation layer 15
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
An apparatus comprising a first electrode (147) on a planarization layer (123), an organic emission layer (148) on the first electrode, a first bank (161) and a second bank (162) on the planarization layer (123) and configured to surround the organic emission layer (148) and an anti-moisture unit (155) on a portion of the planarization layer (123) and a portion of the second bank (162), wherein the anti-moisture unit (155) is configured to suppress moisture permeation through the second bank (162) and the planarization layer (123).