Display Transmission-Area Groove Layout for Moisture Blocking
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Solution Overview
Problem
Existing display apparatus manufacturing processes face challenges in producing a transmission area while minimizing defects and ensuring efficient integration of additional components without compromising the display area.
Innovation Solution
A display apparatus design featuring a transmission area surrounded by a middle area with grooves and a display area, utilizing polycrystalline silicon and oxide semiconductor thin film transistors, and a thin film encapsulation layer to protect the display element, along with a method of manufacturing that includes forming semiconductor layers and grooves to ensure structural integrity and moisture protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transmission area is added to the display apparatus to integrate additional components, then the functionality and versatility of the display apparatus are improved, but the manufacturing complexity and defect rate increase
Solution Approach 1:
The display apparatus is divided into distinct functional areas: a display area for visual output, a transmission area for additional components (such as sensors or cameras), and a middle area connecting them. This segmentation allows each area to be optimized independently for its specific function while simplifying the overall manufacturing process by treating them as separate zones with different structural requirements.
Solution Approach 2:
The groove structure extends in the vertical dimension through multiple layers (first groove in the first substrate, second groove in the second substrate, and third groove connecting them). This three-dimensional groove system provides moisture blocking functionality without occupying horizontal display area, thus adding functionality in the vertical dimension while maintaining the simplicity of the horizontal manufacturing process.
2Adaptability or versatility
If a transmission area with through holes is created to accommodate additional components, then the adaptability of the display apparatus is improved, but manufacturing defects and moisture infiltration risks increase
Solution Approach 1:
The groove structure is localized specifically at the transmission area where through holes are present, rather than throughout the entire display apparatus. The first groove, second groove, and third groove are positioned precisely to seal the transmission area boundaries and protect the through holes from moisture infiltration, while leaving the display area structure unchanged and simple.
Solution Approach 2:
The groove structure acts as an intermediary barrier between the external environment and the through holes in the transmission area. The groove walls and associated layers (such as the blocking layer mentioned in the patent) create a protective interface that prevents moisture from reaching the through holes and internal components, thus mediating the interaction between the transmission area openings and the external environment.
3Reliability
If grooves and additional layers are added to protect the transmission area from moisture, then moisture resistance is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The groove structure is integrated with the existing multi-layer substrate structure of the display apparatus. The first groove is formed in the first substrate, the second groove in the second substrate, and the third groove connects them, merging the moisture protection function with the existing mechanical and optical structure. This integration allows the groove structure to serve dual purposes: structural support and moisture blocking, without requiring completely separate manufacturing processes.
Solution Approach 2:
The groove structure and associated layers serve multiple functions simultaneously: they provide moisture blocking, structural support, and define the boundaries between the display area and transmission area. The blocking layer within the groove structure also serves both as a moisture barrier and as part of the optical path management. This multi-functionality reduces the need for additional dedicated components, thereby simplifying the overall manufacturing process despite the added protection features.
Data Source
AI summary
A display apparatus includes a substrate including a transmission area having a first through hole, a display area surrounding the transmission area, and a middle area disposed between the transmission area and the display area, a pixel circuit disposed on the display area, the pixel circuit including a first thin film transistor including a first semiconductor layer having polycrystalline silicon, and a second thin film transistor including a second semiconductor layer including an oxide semiconductor, a display element including a pixel electrode electrically connected to the pixel circuit, an opposite electrode disposed on the pixel electrode, and an intermediate layer disposed between the pixel electrode and the opposite electrode and including an emission layer, and a groove disposed in the middle area while surrounding the first through hole.