Touch Display Panel Layer Structure for Peripheral Peeling Prevention
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Solution Overview
Problem
The issue of film layer peeling in flexible multi-layer on cell (FMLOC) display panels leads to contamination, signal disruption, and product scrapping, particularly due to poor contact between inorganic and organic insulation layers in the peripheral regions, causing film layer upwarping, wrinkling, and water/oxygen invasion.
Innovation Solution
The solution involves removing the inorganic insulation layer in specific regions of the peripheral area, allowing direct contact between the organic insulation layer and the touch conductive layer or protection layer, thereby preventing film layer peeling and ensuring better structural integrity and reducing the risk of water/oxygen invasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inorganic insulation layer is present in the peripheral region, then the touch function layer provides insulation and protection, but the organic insulation layer and inorganic insulation layer fail to make good contact, causing film layer upwarping, wrinkling, and peeling
Solution Approach 1:
The inorganic insulation layer is removed from the peripheral region where it causes contact problems between layers. This extraction eliminates the source of upwarping and wrinkling in the peripheral area while preserving the inorganic insulation layer in the display region where it provides necessary protection and insulation.
Solution Approach 2:
The inorganic insulation layer is segmented into two parts: it is retained in the display region and removed from the peripheral region. This segmentation allows different structural configurations in different areas of the panel, optimizing both contact quality and flatness where needed.
2Stability of the object's composition
If the inorganic insulation layer is removed in the peripheral region, then direct contact between organic insulation layer and touch conductive layer prevents upwarping and wrinkling, but the touch function layer loses insulation protection in that region
Solution Approach 1:
The structure of the touch function layer is made non-uniform: in the display region, the complete structure with inorganic insulation layer is maintained for protection, while in the peripheral region, the inorganic insulation layer is removed to ensure good contact and flatness. Each region has the quality needed for its specific function.
3Productivity
If film layer peeling occurs in the peripheral region, then the display panel can be manufactured, but contamination and signal disruption occur, leading to product scrapping
Solution Approach 1:
The inorganic insulation layer is removed in advance from the peripheral region during the manufacturing process, before the panel is assembled and before peeling can occur. This preliminary action prevents contamination and signal disruption that would otherwise lead to scrapping, thereby improving product yield.
Data Source
AI summary
Disclosed are a touch display panel, a touch display apparatus and a touch display mother board. The touch display panel includes: a base substrate, including a display region and a peripheral region; a display function layer, including: at least one organic insulation layer and an encapsulation layer, wherein an orthographic projection of the encapsulation layer on the base substrate covers the display region and part of the peripheral region; and a touch function layer, located on a side of the encapsulation layer facing away from the base substrate and including: a touch conductive layer, an inorganic insulation layer, wherein the touch function layer includes: a first touch conductive layer, and a second touch conductive layer located on a side of the first touch conductive layer facing away from the display function layer, the inorganic insulation layer includes at least: a first inorganic insulation layer.