Rollable Display Circuit Layout for Cylinder Space Utilization
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Solution Overview
Problem
Existing rollable display devices face challenges in efficiently utilizing the space inside a cylinder, particularly in accommodating the flexible printed circuit portion and source boards while maintaining electrical connectivity.
Innovation Solution
The display device incorporates a flexible printed circuit portion that includes a first connection portion, a second connection portion, and a body extending perpendicular to the first direction, which is electrically connected to source boards and accommodated within a cylinder, allowing for efficient space utilization by being wound or folded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the flexible printed circuit portion and source boards are accommodated inside the cylinder, then the space utilization is improved, but the device complexity increases
Solution Approach 1:
The flexible printed circuit portion and source boards are nested inside the cylinder, with the circuit portion wound around the source boards. This nesting arrangement allows multiple components to occupy the same spatial envelope, efficiently utilizing the limited volume inside the cylinder while maintaining a compact overall structure.
Solution Approach 2:
The flexible printed circuit portion is designed to be dynamically configurable between wound and unwound states. When wound, it compactly fits inside the cylinder with the source boards; when unwound, it provides sufficient surface area for electrical connections and signal transmission. This dynamic transformation resolves the contradiction between compact storage and functional requirements.
2Volume of moving object
If the flexible printed circuit portion is wound on the source boards, then the space inside the cylinder is efficiently utilized, but the ease of manufacture decreases
Solution Approach 1:
The flexible printed circuit portion is segmented into distinct functional regions: a first connection portion for connecting to the source board, a body portion that gets wound, and a second connection portion for external connections. This segmentation allows each portion to be manufactured and tested independently before final assembly, simplifying the overall manufacturing process despite the complex final configuration.
Solution Approach 2:
The flexible printed circuit portion is pre-configured with connection portions and conductive patterns before being wound around the source boards. This preliminary preparation of electrical connections ensures that the winding process does not compromise signal integrity, and allows for quality verification before final assembly, thereby maintaining manufacturing ease.
3Stability of the object's composition
If the body of the flexible printed circuit portion extends perpendicular to the connection portions, then the accommodation stability is improved, but the device complexity increases
Solution Approach 1:
The body of the flexible printed circuit portion is configured to extend perpendicular to the connection portions, creating a T-shaped or L-shaped geometry when unwound. When wound, this configuration naturally forms a compact spiral or cylindrical shape that fits efficiently inside the cylinder. The perpendicular extension provides structural stability during winding while maintaining a simple overall form factor.
Data Source
AI summary
A display device according to one or more embodiments comprises a flexible display panel, a connection film at least partially overlapping the display panel, and electrically connected to the display panel, source boards at least partially overlapping the connection film, and electrically connected to the connection film, and a flexible printed circuit portion electrically connecting the source boards, and wound or folded on the source boards.