OLED Display Non-Display Area Trench Moisture Barrier
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Solution Overview
Problem
Organic light emitting display devices face deterioration in light-emitting properties due to external moisture infiltration into the non-display areas, which affects display quality.
Innovation Solution
The display device incorporates a trench area and power line arrangement in the non-display area to minimize moisture infiltration, with a second electrode connected to an auxiliary electrode in the trench area to reduce electrical resistance and prevent moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second electrode is extended to the non-display area, then the electrical resistance is reduced, but the moisture infiltration risk increases
Solution Approach 1:
The non-display area is divided into multiple trench areas that segment the extended second electrode into isolated sections. These trenches act as moisture barriers while allowing the electrode to maintain its extended configuration for low resistance, thus resolving the contradiction between electrical performance and moisture protection.
Solution Approach 2:
The trench areas serve as intermediary structures between the extended second electrode and the external environment. They provide a physical barrier against moisture infiltration while allowing the electrode to extend into the non-display area, mediating between the need for low resistance and moisture protection.
2Adaptability or versatility
If the non-display area is used for routing power lines and driving circuits, then device functionality is improved, but moisture infiltration pathways are created
Solution Approach 1:
The non-display area is segmented into multiple trench regions that allow power lines and driving circuits to be routed while creating moisture barriers. This segmentation enables functional versatility while protecting against moisture infiltration through the structured division of the non-display space.
Solution Approach 2:
Different regions of the non-display area are given different local qualities - some areas contain trenches for moisture protection while others accommodate power lines and circuits for functionality. This local differentiation allows simultaneous achievement of device versatility and moisture resistance.
Data Source
AI summary
The present disclosure relates to a display device that includes a substrate including a display area and a non-display area including at least one trench area. The display device includes plural sub-pixels disposed in the display area, a driving circuit and a power line disposed in the non-display area, at least one transistor disposed in the plural sub-pixels, an overcoat layer disposed on the at least one transistor and a light emitting diode. The light emitting diode includes a first electrode and a second electrode disposed on the first electrode. The light emitting diode is disposed on the overcoat layer and linked electrically to the at least one transistor. The overcoat layer and the second electrode extends to the non-display area. The second electrode is linked to a portion of an auxiliary electrode in the at least one trench area.