Rollable Display Connector Axial Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in minimizing the radius of the rotation shaft, which affects the compactness and portability of rollable display devices.
Innovation Solution
A display device design that includes a display panel, a chip-on-film attached to the panel, a printed circuit board with a connector portion, and a rotation shaft with a cut groove, allowing the panel to be rolled or unrolled without increasing the overall device size by strategically positioning connectors and protrusions to minimize the rotation shaft's radius.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connector portion of the printed circuit board is positioned to extend beyond the rotation shaft ends, then electrical connectivity is maintained during rolling, but the rotation shaft radius increases
Solution Approach 1:
The connector portion is positioned to extend beyond the ends of the rotation shaft in the axial direction (one-dimensional extension), allowing the display panel to be rolled while maintaining electrical connectivity without increasing the radial dimension. This dimensional approach resolves the contradiction by sacrificing axial space to preserve radial compactness.
2Adaptability or versatility
If the display panel is rolled around the rotation shaft, then portability is enhanced, but the rotation shaft radius increases device size
Solution Approach 1:
The display panel is configured to roll in the axial direction of the rotation shaft rather than radially, extending beyond the shaft ends during the rolled state. This allows the device to achieve a compact form factor while maintaining portability through the rolling mechanism.
Solution Approach 2:
The display device is divided into functional segments: the rotation shaft for mechanical rolling, the connector portion for electrical connectivity, and the display panel for visualization. This segmentation allows each component to be optimized independently, with the connector positioned to extend axially rather than radially.
3Area of stationary object
If the connector portion overlaps the display panel in plan view, then device area is reduced, but electrical connectivity during rolling is compromised
Solution Approach 1:
The connector portion is positioned to extend beyond the ends of the rotation shaft in the axial direction, creating a non-overlapping configuration in plan view. This spatial arrangement maintains electrical connectivity during rolling operations while preserving device area by eliminating redundant overlap regions.
Data Source
AI summary
A display device includes a display panel; a chip on film attached to an end of the display panel; a printed circuit board electrically connected to an end of the chip on film and including a connector portion; a rotation shaft including the printed circuit board and extending in a direction; and a flexible cable having an end electrically connected to the connector portion of the printed circuit board. The connector portion of the printed circuit board does not overlap the display panel in a plan view.