Touch Display Panel Peripheral Layer Layout to Prevent Peeling
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Solution Overview
Problem
The issue of film layer peeling and contamination in flexible multi-layer on cell (FMLOC) display panels, leading to signal disruption and product scrapping, is prevalent due to poor contact between inorganic and organic insulation layers, especially in the peripheral regions, causing wrinkles, cracks, 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 upwarping, wrinkling, and crack formation, and enhancing product yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inorganic insulation layer is kept intact in the peripheral region, then the insulation performance is improved, but film layer peeling and wrinkling occur due to poor contact with the organic insulation layer
Solution Approach 1:
The patent applies local quality by differentiating the treatment of the inorganic insulation layer between different regions: in the display region, the inorganic insulation layer is retained to maintain insulation performance, while in the peripheral region, the inorganic insulation layer is removed to enable direct contact between the organic insulation layer and touch conductive layer, preventing peeling and wrinkling. This regional differentiation resolves the contradiction between insulation performance and film layer contact stability.
2Stability of the object's composition
If the inorganic insulation layer is removed in the peripheral region, then film layer peeling is prevented, but insulation performance may be compromised
Solution Approach 1:
The patent maintains insulation performance while preventing peeling by locally removing the inorganic insulation layer only in the peripheral region where peeling occurs, while retaining it in the display region where insulation is critical. The organic insulation layer is extended to directly contact the touch conductive layer in the peripheral region, providing sufficient insulation without the inorganic layer, thus resolving the contradiction between preventing peeling and maintaining insulation performance.
3Reliability
If the encapsulation layer is extended to cover the peripheral region, then film layer protection is improved, but manufacturing complexity increases
Solution Approach 1:
The patent extracts the inorganic insulation layer from the peripheral region, eliminating the need for complex multi-layer structures in that area. By removing the inorganic insulation layer in the peripheral region and allowing direct contact between the organic insulation layer and touch conductive layer, the structure is simplified while still providing adequate protection against peeling and wrinkling, thus resolving the contradiction between film layer protection and manufacturing complexity.
4Stability of the object's composition
If the organic insulation layer makes direct contact with the touch conductive layer in the peripheral region, then peeling is prevented, but insulation performance may be reduced
Solution Approach 1:
The patent applies local quality by making the organic insulation layer directly contact the touch conductive layer specifically in the peripheral region where peeling occurs, while maintaining the inorganic insulation layer in the display region where high insulation performance is required. The organic insulation layer's extended coverage in the peripheral region provides sufficient local insulation while enabling direct contact to prevent peeling, thus resolving the contradiction between contact stability and insulation performance.
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.