Flexible Display Module Buffer Layer for Circuit Protection
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Solution Overview
Problem
Flexible dynamic bendable display products face issues with circuit breakage due to pressure on the flexible cover plate, leading to undesirable displays and reduced yield and reliability.
Innovation Solution
A display module design featuring a flexible filling portion between the flexible cover plate and display panel, along with a polarizing layer and optical clear resin, which cushions and protects the panel, reducing extrusion force and preventing circuit breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the flexible cover plate is made of soft material to improve flexibility and comfort, then the ease of operation is improved, but the reliability deteriorates due to circuit breakage when pressed
Solution Approach 1:
A buffer layer is introduced between the flexible cover plate and the display panel to act as an intermediary. This buffer layer absorbs pressing forces and prevents direct transmission to the panel, thereby maintaining both the flexibility of the soft cover plate and the reliability of the underlying circuitry.
Solution Approach 2:
The buffer layer is pre-installed between the flexible cover plate and the display panel to provide beforehand cushioning. This pre-positioned cushioning structure absorbs potential impact forces before they can reach the sensitive circuit components, preventing circuit breakage while preserving the soft material's flexibility.
2Ease of operation
If the flexible cover plate is pressed at the binding area to improve contact, then the ease of operation is improved, but the harmful factors increase due to extrusion of the panel
Solution Approach 1:
The buffer layer serves as a mediator between the flexible cover plate and the display panel. When the user presses the cover plate, the buffer layer absorbs and distributes the pressure, preventing concentrated extrusion forces from damaging the panel while still allowing effective user contact.
Solution Approach 2:
The buffer layer changes the pressure distribution parameters by converting concentrated point pressure into distributed area pressure. This parameter transformation reduces the extrusion force density on the panel, preventing damage while maintaining operational effectiveness.
3Device complexity
If no buffer structure is added to simplify the design, then the device complexity is reduced, but the reliability deteriorates due to lack of protection against circuit breakage
Solution Approach 1:
A thin flexible buffer layer is used instead of complex rigid protection structures. This thin film approach provides effective cushioning and protection against circuit breakage while adding minimal structural complexity, maintaining design simplicity while improving reliability.
4Reliability
If a buffer layer is added to protect the panel and improve reliability, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The buffer layer is implemented as a thin flexible film that integrates seamlessly between the existing components. This approach provides comprehensive protection against circuit breakage while minimizing the increase in device complexity through the use of a single, thin protective layer rather than multiple thick components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces circuit breakage and deformation of the flexible cover plate, enhancing the reliability and yield of flexible display products by providing better cushioning and protection.
Implementation Method 1
the first flexible filling portion located between the bent portion and the flexible cover plate layer is disposed in the non-display area to fill a misalignment gap... when a user presses the flexible cover plate layer, the first flexible filling portion can have a better effect of cushioning and protection
Implementation Method 2
a polarizing layer and an optical clear resin (OCR) layer, the polarizing layer is located on the flexible display panel, the OCR layer is located on the polarizing layer
Implementation Method 3
the non-display area further has disposed therein an ultraviolet curing adhesive layer, and the ultraviolet curing adhesive layer is located on the bent portion
Data Source
AI summary
A display module and a mobile terminal are provided. The display module includes a display area and a non-display area located on a side of the display area. The non-display area includes: a support portion, a flexible display panel located on the support portion and including a bent portion, a flexible cover plate layer located on the flexible display panel, and a first flexible filling portion located between the bent portion and the flexible cover plate layer.