OLED Shock Absorption Member Layer Stack
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Solution Overview
Problem
Organic light-emitting display apparatuses are prone to damage from external shocks, particularly when used in portable devices, as existing technologies lack effective shock absorption mechanisms that can be integrated without additional manufacturing processes.
Innovation Solution
Incorporating a shock absorption member with a layer stack structure, including layers analogous to those in the thin film transistor and pixel electrode, between the lower and upper substrates, which is formed simultaneously with the TFT and pixel electrode, providing a buffer against external shocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shock absorption member is added to protect against external shocks, then the durability and reliability of the display apparatus is improved, but the device complexity and manufacturing process become more complex
Solution Approach 1:
The shock absorption member is merged with the existing layer stack structure of the display apparatus. It is formed simultaneously with the TFT and pixel electrode using the same manufacturing processes, integrating the shock absorption function into the existing structure without adding separate components or steps.
Solution Approach 2:
The layer stack structure serves dual functions: it forms the essential TFT and pixel electrode components for display operation, while simultaneously creating the shock absorption member that protects against external shocks. This multi-functionality resolves the contradiction by making the protective structure also the functional structure.
2Reliability
If a shock absorption member with additional layers is incorporated, then the shock absorption capability is improved, but the manufacturing precision and process complexity increase
Solution Approach 1:
The shock absorption member is formed by merging the formation processes of existing layers (TFT and pixel electrode) into a single integrated manufacturing sequence. The same deposition and patterning steps that create the functional layers also create the shock absorption structure, eliminating the need for separate manufacturing processes.
Solution Approach 2:
The shock absorption member is formed preliminarily during the same manufacturing steps as the TFT and pixel electrode, before the display apparatus is assembled and before any shock events occur. This preliminary formation ensures that the protective structure is already in place with the correct geometry and material properties.
3Reliability
If the shock absorption member is formed separately from the sealing member, then the shock absorption function is improved, but the device complexity and assembly process become more complex
Solution Approach 1:
The shock absorption member and sealing member are formed as separate structures during the same manufacturing process, but they are integrated in function within the same device architecture. The shock absorption member is positioned between the display area and the sealing member, creating a protective hierarchy without requiring separate assembly steps.
Data Source
AI summary
An OLED apparatus including a lower substrate including a display and peripheral area, the peripheral area surrounding the display area; a TFT on the lower substrate; a pixel electrode electrically connected to the TFT; a pixel defining layer covering an edge of the pixel electrode and exposing a central portion of the pixel electrode; an intermediate layer on the pixel electrode and including an emission layer; an opposite electrode overlying the pixel electrode; an upper substrate overlying the lower substrate; a sealing member on the peripheral area and attaching the lower substrate to the upper substrate; and a shock absorption member including a first layer on the peripheral area, the first layer being separated from the sealing member and stacked in a layer stack structure on the lower substrate; and a second layer on the first layer and including a same material as the pixel defining layer.