Display Peripheral Wiring and Encapsulation for Moisture Blocking
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Solution Overview
Problem
Existing display apparatuses face challenges in preventing external moisture and oxygen penetration while maintaining high-quality performance and minimizing the size of the peripheral area, which affects the reliability and efficiency of the display.
Innovation Solution
The display apparatus incorporates a substrate with a display area and a peripheral area, featuring main and auxiliary wirings in the same layer, a connecting wiring with an insulating layer, and a thin-film encapsulation layer comprising inorganic and organic layers to seal the areas, with the auxiliary wiring acting as a blocking unit to prevent moisture and oxygen ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional single wiring structure is used in the peripheral area, then the structure is simple, but the resistance value is high and voltage drop occurs
Solution Approach 1:
The single wiring structure is segmented into multiple parallel wirings (first wiring and second wiring) to reduce resistance and voltage drop while maintaining structural simplicity through systematic division
2Reliability
If the peripheral area is enlarged to accommodate blocking units, then moisture and oxygen penetration is prevented, but the display apparatus size increases
Solution Approach 1:
The auxiliary wiring serves dual functions: it provides electrical connection (original function) and acts as a blocking unit preventing moisture and oxygen penetration (additional function), eliminating the need for separate blocking structures
Solution Approach 2:
The blocking function is merged with the wiring structure by making the auxiliary wiring itself serve as the blocking unit, combining protection and conduction functions in a single element
3Reliability
If additional blocking units are added to prevent moisture and oxygen, then protection is improved, but device complexity increases
Solution Approach 1:
The auxiliary wiring performs multiple functions including electrical connection and moisture/oxygen blocking, eliminating the need for separate blocking units and reducing overall device complexity
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 reduces the resistance value of the wirings, minimizes voltage drop, and effectively prevents external moisture and oxygen penetration, thereby enhancing the display's reliability and reducing the peripheral area size without the need for additional blocking units.
Implementation Method 1
a thin-film encapsulation layer configured to seal the display area and the peripheral area
Implementation Method 2
with an insulating layer interposed between the main wiring and the auxiliary wiring
Data Source
AI summary
A display apparatus includes a substrate including a display area displaying an image and a peripheral area outside the display area, a main wiring and an auxiliary wiring disposed in an identical layer in the peripheral area, the main wiring being disposed closer to the display area than the auxiliary wiring, a dam configured to cover at least a part of the main wiring, the auxiliary wiring being spaced apart from the dam, and a connecting wiring configured to connect the main wiring to the auxiliary wiring, and a thin-film encapsulation layer configured to seal the display area and the peripheral area.