OLED Display Panel Sealant Layer for Non-Display Region Smoothing
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Solution Overview
Problem
The existing OLED display panels face issues with unevenness in the non-display region, which affects peripheral wiring and leads to stress-related de-lamination during processing, such as when transported by a robot arm.
Innovation Solution
A sealant layer is applied to the non-display region to smooth its surface, facilitating peripheral wiring and reducing process difficulties, while also absorbing and dispersing stress between layers to prevent de-lamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thin film encapsulation (TFE) technology is applied to OLED display panels, then the display region achieves smooth surface and better characteristics, but the non-display region exhibits large unevenness
Solution Approach 1:
The patent applies different treatment to different regions: the display region receives TFE technology for smooth surface, while the non-display region is filled with sealant material to compensate for unevenness. This local differentiation resolves the contradiction by optimizing each region according to its specific requirements.
Solution Approach 2:
The sealant layer acts as an intermediary substance that fills the uneven non-display region. This intermediate material bridges the gap between the encapsulated display region and the underlying substrate, achieving surface uniformity without affecting the TFE-encapsulated display area.
2Reliability
If the non-display region has large unevenness, then TFE encapsulation can be applied, but peripheral wiring becomes difficult and process complexity increases
Solution Approach 1:
The patent performs preliminary action by filling the non-display region with sealant material before applying the TFE encapsulation and subsequent wiring processes. This pre-treatment creates a uniform surface that facilitates easier peripheral wiring and reduces process complexity.
Solution Approach 2:
The sealant filling is applied locally to the non-display region only, leaving the display region unchanged for optimal TFE encapsulation. This localized treatment enables both reliable encapsulation and ease of peripheral wiring by addressing only the problematic area.
3Productivity
If the glass periphery undergoes transportation and processing, then manufacturing continues, but large stress causes film layer de-lamination
Solution Approach 1:
The sealant layer serves as a cushioning element that is installed beforehand to absorb and disperse stress during subsequent transportation and processing. This preventive measure protects the film layers from de-lamination caused by stress during manufacturing operations.
Solution Approach 2:
The sealant layer acts as a stress-distributing intermediary between the rigid glass substrate and the flexible film layers. During transportation and processing, this intermediate layer absorbs mechanical stress and prevents direct stress transmission that would cause de-lamination.
Data Source
AI summary
The present disclosure discloses an organic light emitting diode display panel, a manufacturing method thereof, and an organic light emitting diode display apparatus. The organic light emitting diode display panel may include a display region and a non-display region, and a surface of the non-display region filled with a sealant layer to smooth the surface of the non-display region. The non-display region of the display panel of the present disclosure may have a smooth surface. A peripheral wiring may be facilitated, and a process difficulty of the wiring may be reduced. Moreover, the sealant layer may absorb and disperse the stress between the layers, and may improve a de-lamination condition caused by an excessive stress.