Organic Insulation Layers for Foldable Touch Display Panels
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Solution Overview
Problem
Current foldable display panels have a large bending radius and are prone to creasing and warping when bent for an extended period due to the poor flexibility of inorganic materials used in their insulation layers, which limits their durability and functionality.
Innovation Solution
The use of organic materials, such as silicone resin, acrylic resin, or polyimide resin, for the intermediate and touch insulation layers in a touch display panel, along with a thin film encapsulation layer and a color filter, enhances flexibility and reduces the bending radius, preventing creasing and warping while improving display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic materials are used for insulation layers, then electrical insulation performance is improved, but flexibility and bendability deteriorate
Solution Approach 1:
The patent changes the material parameter from inorganic to organic, fundamentally altering the mechanical properties while maintaining electrical insulation functionality. This allows the insulation layers to be flexible and suitable for foldable displays.
Solution Approach 2:
The patent uses composite material structures where organic insulation layers are combined with other functional layers (such as thin film encapsulation layers and color filters) to create a multi-layer system that achieves both electrical insulation and flexibility requirements.
2Stability of the object's composition
If inorganic materials are used for insulation layers, then thermal stability is improved, but flexibility and resistance to creasing deteriorate
Solution Approach 1:
The patent changes the material composition parameter from inorganic to organic, which fundamentally alters the mechanical behavior under bending stress. Organic materials exhibit better elasticity and recovery characteristics, preventing permanent creases while maintaining adequate thermal stability for display operation.
Solution Approach 2:
The patent employs thin film structures made of organic materials that can flex and recover without permanent deformation. The thin film encapsulation layer and organic insulation layers work together as flexible protective structures that resist creasing.
3Adaptability or versatility
If the bending radius is reduced, then flexibility and adaptability are improved, but the display panel may break
Solution Approach 1:
The patent uses multiple thin film layers (thin film encapsulation layer, organic insulation layers) that can accommodate small bending radii without breaking. These thin films are inherently more flexible and damage-resistant at bent states compared to thick rigid layers.
Solution Approach 2:
The patent creates a composite multi-layer structure where different materials (organic insulation layers, thin film encapsulation, color filters) work together to distribute stress during bending, preventing any single layer from bearing excessive stress that would cause failure.
4Adaptability or versatility
If organic materials are used for insulation layers, then flexibility is improved, but manufacturing precision and material consistency deteriorate
Solution Approach 1:
The patent carefully controls the thickness parameter of organic insulation layers (1-3 microns) to achieve consistent performance. By standardizing this critical parameter, the patent maintains manufacturing precision while benefiting from the flexibility of organic materials.
Data Source
AI summary
The invention provides a touch display panel, a method for preparing the same, and a display device. The touch display panel includes a display module and a touch module that are arranged in a stack, the display module including two conductive layers, an intermediate insulation layer arranged between the two conductive layers and a planarization layer, and the touch module including at least two touch electrodes and a touch insulation layer between the at least two touch electrodes, in which the intermediate insulation layer, the touch insulation layer and the planarization layer are all made of an organic material.