Rollable Display Wiring Sheet Integration
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Solution Overview
Problem
Rollable display devices face challenges with wiring line damage and alignment errors due to repeated winding and unwinding, and the need for flexible substrates that can maintain image display capability in a rolled state.
Innovation Solution
A display device design that integrates a flexible flat cable connecting the source and control printed circuit boards, incorporates an extending sheet, and includes a spring in the roller to apply uniform force, minimizing wiring line damage and alignment errors, and allows for easy placement adjustments of the control printed circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate flexible flat cable is used to connect source and control printed circuit boards, then electrical connection is achieved, but the wiring line is susceptible to damage during repeated winding and unwinding
Solution Approach 1:
The patent combines the flexible flat cable with the extending sheet into a single integrated structure. The cable is embedded within the sheet, eliminating the need for separate components and reducing damage risk during winding/unwinding operations by creating a unified, more robust assembly that moves together as one unit
2Area of stationary object
If the display device size is increased, then display area is improved, but alignment errors of wiring lines and circuit boards increase
Solution Approach 1:
By integrating the cable and sheet into a single structure, the patent reduces the number of separate components that need alignment, thereby minimizing cumulative alignment errors that would otherwise increase with larger display dimensions
3Adaptability or versatility
If control printed circuit board placement is fixed, then manufacturing is simplified, but adaptability to different configurations is reduced
Solution Approach 1:
The integrated sheet structure allows the control printed circuit board to be repositioned along the sheet while maintaining electrical connections through the flexible cable, enabling dynamic adjustment of board placement without requiring complex reconnection procedures or fixed mounting structures
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 enhances the reliability of the display device during winding and unwinding, reduces damage to the wiring lines, and compensates for alignment errors, ensuring the display panel is wound without distortion and maintaining image display capability.
Implementation Method 1
a spring in the roller to apply uniform force, minimizing wiring line damage and alignment errors, and allows for easy placement adjustments of the control printed circuit board
Data Source
AI summary
A display device includes a display panel, a plurality of flexible films electrically connected to one end of the display panel, a source printed circuit board electrically connected to the plurality of flexible films, a roller on which the display panel is wound or unwound, a control printed circuit board disposed in the roller and a wiring sheet including a first wiring line electrically connecting at least one of the plurality of source printed circuit boards and the control printed circuit board. By disposing the wiring sheet in which the first wiring and the sheet are integrated, damage of the first wiring due to repeated winding and unwinding can be minimized.