Spiral Cable Routing for Rollable Display Space Optimization
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Solution Overview
Problem
Existing display devices face challenges in minimizing the space required for mounting cables within the housing and efficiently utilizing the space of rollable display devices.
Innovation Solution
The display device incorporates a flexible display panel with a connection film, a printed circuit board, a control board, and a spiral-shaped cable that minimizes space by varying its shape according to the positions of the printed circuit board and control board, allowing efficient use of space within the rollable display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a straight cable is used to connect the printed circuit board and control board, then the electrical connection is simple, but the space required for cable mounting in the housing increases
Solution Approach 1:
The cable is configured in a spiral shape instead of a straight line, allowing it to fit within a compact area while maintaining electrical connection between the printed circuit board and control board. The spiral curvature enables the cable to occupy minimal space in the housing without requiring complex routing structures.
2Length of moving object
If the control board is positioned close to the printed circuit board, then the cable length is reduced, but the heat generation from the control board affects the display panel
Solution Approach 1:
The cable is positioned inside the cylinder that accommodates the display panel, nesting the cable within the existing structural space. This allows the cable to extend from the printed circuit board to the control board without occupying additional external space, while the control board can be positioned at an optimal distance that balances cable length and heat dissipation.
3Area of stationary object
If the cable is positioned inside the cylinder, then the space utilization is improved, but the cable may interfere with the display panel winding and deployment
Solution Approach 1:
The cable is divided into segments: a first straight line portion positioned inside the cylinder and a second straight line portion positioned in the second opening. This segmentation allows different portions of the cable to serve different functions - the first portion utilizes internal cylinder space efficiently, while the second portion extends outward to connect to the control board without interfering with the display panel's winding and deployment operations.
Data Source
AI summary
A display device may include a display panel which is flexible and includes a first surface on which an image is displayed and a second surface on which the image is not displayed, a connection film at least partially overlapping a side of the display panel in a plan view, a printed circuit board at least partially overlapping a side of the connection film in a plan view and electrically connected to the connection film, a control board spaced apart from the printed circuit board, and a cable electrically connecting the printed circuit board and the control board. The cable may have a spiral shape.