Touch Display Panel Manufacturing via Layered Patterning and Through Holes
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Solution Overview
Problem
Flexible and stretchable OLED displays face technical challenges in manufacturing, particularly in achieving improved stretchability and bending performance while maintaining structural integrity and display quality.
Innovation Solution
A method for manufacturing a touch display panel involving a substrate film layer, display functional film layer, encapsulation film layer, and touch functional film layer, with specific patterning processes to form through holes and layers that enhance the panel's flexibility and durability, including the use of inorganic and organic encapsulation layers and conductive bridges for improved sealing and touch functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible and stretchable OLED displays are developed to meet special structures and wide applications, then adaptability and versatility are improved, but structural integrity and reliability deteriorate due to increased risk of cracks and package failure
Solution Approach 1:
The display panel is divided into multiple film layers (substrate film layer, display functional film layer, encapsulation film layer, touch functional film layer) that can be independently formed and patterned. This segmentation allows each layer to be optimized for its specific function while maintaining overall flexibility and reliability
Solution Approach 2:
The patent uses multiple thin film layers including flexible substrate film and encapsulation films to create a structure that can bend and stretch without breaking. The thin film structure provides flexibility while the layered configuration maintains structural integrity during deformation
2Ease of manufacture
If through holes are formed early in the manufacturing process, then ease of manufacture is improved, but manufacturing precision deteriorates due to alignment difficulties with subsequent layers
Solution Approach 1:
The substrate film layer and display functional film layer are formed completely before forming through holes. This preliminary action allows precise patterning of functional layers while maintaining ease of through-hole formation later without compromising alignment
Solution Approach 2:
Instead of forming through holes first and then building layers around them, the patent inverts the sequence by forming all functional film layers first and then creating through holes through the completed structure. This reversal ensures precise alignment while simplifying the overall manufacturing process
3Reliability
If multiple film layers are formed to enhance flexibility and sealing, then reliability is improved, but device complexity increases
Solution Approach 1:
Each film layer serves multiple functions: the substrate film layer provides mechanical support and flexibility, the display functional film layer enables OLED functionality, the encapsulation film layer provides sealing and protection, and the touch functional film layer enables touch sensitivity. This multi-functionality reduces the need for additional specialized layers
Solution Approach 2:
The patent combines multiple functional requirements into integrated film layers. For example, the encapsulation film layer simultaneously provides sealing, mechanical protection, and structural support, while the touch functional film layer integrates touch sensitivity with the display structure, reducing overall device complexity
Data Source
AI summary
The present disclosure relates to a method for manufacturing a touch display panel. The method includes providing a substrate film layer; forming a display functional film layer on the substrate film layer; forming an encapsulation film layer on a side of the display functional film layer away from the substrate film layer; forming a touch functional film layer on a side of the encapsulation film layer away from the display functional film layer; and after the touch functional film layer is formed, removing all film layers which include at least the substrate film layer and are located at opening areas to form through holes.