Rollable Display Panel With Hollow Shaft Cable Routing
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Solution Overview
Problem
Existing display devices with rotating mechanisms face challenges in reducing the overall set size due to interference and overlapping of components during rolling and unrolling, leading to increased dimensions.
Innovation Solution
The design incorporates a rotating shaft that protrudes beyond the edges of the display panel, with a hollow structure and defined cut-out grooves, allowing the flexible cable and printed circuit board to be wound around its outer surface without overlapping the display panel, thereby minimizing interference and reducing the overall size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rotating shaft is designed to accommodate the printed circuit board and flexible cable, then the device can be rolled and unrolled, but the overall set size increases due to component overlapping and interference
Solution Approach 1:
The printed circuit board is disposed inside the hollow interior of the rotating shaft, and the flexible cable is wound around the outer circumferential surface of the rotating shaft, creating a nested arrangement where components are contained within or around the shaft structure rather than occupying separate external spaces
Solution Approach 2:
The rotating shaft extends in the first direction (width direction of display panel) beyond the second edges of the display panel, utilizing the width dimension to position components in a direction perpendicular to the rolling direction, thereby preventing interference between the flexible cable and display panel during rolling operations
2Reliability
If the flexible cable is routed through the rotating shaft structure, then connection is maintained during rolling, but component interference increases the overall dimensions
Solution Approach 1:
The rotating shaft is divided into distinct functional portions: a hollow interior portion for accommodating the printed circuit board, an outer circumferential surface for winding the flexible cable, and extended portions protruding beyond the display panel edges to prevent cable interference
Solution Approach 2:
The rotating shaft acts as an intermediary structure that mediates between the printed circuit board and flexible cable, providing dedicated spaces for each component and preventing direct interference between them while maintaining connection stability during rolling and unrolling operations
Data Source
AI summary
A display device includes a display panel including first edges extending in a first direction and facing each other and second edges extending in a second direction and facing each other, the second direction intersecting the first direction, a printed circuit board connected to the display panel and including a connector, a rotating shaft which extends in the first direction and in which the printed circuit board is disposed and a hollow is defined, and a flexible cable including an end connected to the connector of the printed circuit board. The rotating shaft includes an overlapping portion which overlaps the display panel and a first protruding portion which protrudes further than one of the second edges of the display panel in the first direction. The display panel and the flexible cable are rolled or unrolled by being wound or unwound around an outer circumferential surface of the rotating shaft.