Vacuum Bending of Flexible Display Panels to Prevent Circuit Board Separation
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Solution Overview
Problem
Existing flexible display devices face challenges in maintaining reliability during bending due to the risk of separation between the display panel and the circuit board, which affects the integrity and functionality of the device.
Innovation Solution
A method of manufacturing a display device that includes a display panel with a first area for pixels, a second area for bending, and a third area where a force is applied using vacuum members to bend the panel without directly applying force to external components like the circuit board, thereby reducing separation and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If force is directly applied to the circuit board to bend the display panel, then the bending process can be controlled, but separation between the display panel and circuit board occurs reducing reliability
Solution Approach 1:
A support member is introduced as an intermediary component between the bending apparatus and the circuit board. This support member distributes the bending force across multiple contact points and prevents direct concentrated force application that would cause separation. The support member acts as a mediator that enables controlled bending while maintaining bonding integrity between the display panel and circuit board.
Solution Approach 2:
The bending force application is segmented into multiple discrete contact points through the support member structure. Instead of applying force at a single location, the support member distributes the force across multiple segments or zones along the circuit board, preventing localized stress concentration that would cause delamination while achieving the desired bending curvature.
2Adaptability or versatility
If the display panel is made flexible to enable folding and bending, then user convenience and design flexibility are improved, but the risk of separation between components increases affecting reliability
Solution Approach 1:
The support member is positioned and configured in advance to provide cushioning protection during the bending operation. By pre-positioning the support member at critical locations where separation is most likely to occur, the system proactively prevents damage before it happens, allowing flexible configurations to be achieved without compromising component bonding integrity.
Solution Approach 2:
The support member serves as an intermediary protective element that enables the flexible display panel to be bent into various configurations while preventing direct harmful interactions between the bending apparatus and the circuit board components, thus maintaining reliability during adaptable configurations.
3Reliability
If vacuum force is applied to the third area to bend the second area, then separation is prevented and reliability is improved, but the device complexity increases due to additional vacuum members
Solution Approach 1:
The vacuum members are designed to perform multiple functions simultaneously: they apply suction force to hold the display panel, provide distributed support during bending, and prevent separation between components. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in overall device complexity while achieving improved reliability.
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 prevents separation between the display panel and the circuit board during bending, improving the reliability and design flexibility of the display module, allowing for various folding and bending configurations while maintaining image display functionality.
Implementation Method 1
providing a plurality of vacuum members respectively corresponding to a plurality of locations in the peripheral area; and the plurality of vacuum members respectively providing a vacuum force as the first force, to the display panel
Data Source
AI summary
A manufacturing method of a display device includes providing a display panel including: a first area in which a plurality of pixels is arranged, a second area adjacent to the first area and at which the display panel is bendable, and a third area facing the first area with the second area therebetween; providing a circuit board electrically connected to the display panel at the third area; providing a first force to the third area of the display panel; and bending the second area of the display panel by the first force which is provided to the third area of the display panel.