Light Emitting Display Emission Layer Segmentation
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Solution Overview
Problem
Seamless light emitting display apparatuses face challenges in minimizing non-display areas due to the difficulty in separating the emission layer in non-display areas, leading to potential moisture permeation and larger bezel sizes.
Innovation Solution
A light emitting display apparatus design that uses a division portion at the upper end of a dam to separate the emission layer, reducing the non-display area and minimizing bezel size by effectively dividing the emission layer between the display and non-display areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate structure is added outside the dam to separate the emission layer, then moisture permeation is prevented, but the non-display area size increases and bezel area becomes larger
Solution Approach 1:
The emission layer is segmented into display area emission layer and non-display area emission layer that are separated from each other. The division portion provided on the dam creates a physical separation between these two emission layers, preventing moisture from the non-display area from reaching the display area emission layer while maintaining a compact overall structure without requiring additional external separation structures.
2Area of stationary object
If the emission layer in non-display area is removed, then non-display area size is reduced, but moisture can permeate through the emission layer
Solution Approach 1:
The emission layer is divided into distinct display area and non-display area segments. The division portion on the dam creates a barrier that prevents moisture permeation from the non-display area emission layer to the display area emission layer, allowing the non-display area emission layer to remain without compromising overall device reliability.
Solution Approach 2:
The division portion provided on the dam acts as an intermediary barrier between the display area emission layer and non-display area emission layer. This intermediate structure prevents direct moisture permeation while allowing both emission layers to coexist in their respective areas.
3Area of stationary object
If the non-display area is minimized, then bezel area is reduced, but it becomes difficult to separate the emission layer
Solution Approach 1:
The emission layer is segmented into distinct display and non-display area portions separated by the division portion on the dam. This segmentation enables clear manufacturing boundaries and separation processes even when the non-display area is minimized, as the division portion provides a defined separation line during fabrication.
Data Source
AI summary
A light emitting display apparatus can include a substrate including a display area and a non-display area surrounding the display area, a circuit layer on the substrate, a planarization layer on the circuit layer, and a dam disposed on the planarization layer and located at a boundary between the display area and the non-display area. Also, the light emitting display apparatus can further include a division portion disposed on the dam, the division portion extending along the dam; a display area emission layer disposed in the display area; a non-display area emission layer disposed outside the dam, the dam being located between the display area emission layer and the non-display area emission layer; and a division portion emission layer disposed on an upper surface of the division portion. The division portion emission layer can be separated from the display area emission layer and the non-display area emission layer.