Rollable Display Support Bar Spacing for Stress Control
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Solution Overview
Problem
Flexible display devices are prone to damage due to uneven stress distribution and interference between support bars during winding and unwinding processes, leading to potential damage to the display module.
Innovation Solution
A display device design featuring a support part with a resin layer and support bars arranged in an extension direction, connected to a shaft with varying distances between bars to evenly distribute stress, preventing interference and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If support bars are arranged with uniform spacing in the support part, then manufacturing is simplified, but stress distribution becomes uneven during winding and unwinding causing display module damage
Solution Approach 1:
The support bars are arranged with different spacing intervals in different regions of the support part. Specifically, the support part includes a first region with first support bars spaced at a first interval and a second region with second support bars spaced at a second interval that is greater than the first interval. This non-uniform arrangement optimizes stress distribution during winding and unwinding operations, preventing display module damage while maintaining manufacturing feasibility.
2Strength
If support bars are closely spaced to provide continuous support, then structural strength increases, but interference between support bars occurs during winding process
Solution Approach 1:
The support part is segmented into multiple regions with different support bar spacing. The first region has closely spaced support bars to provide continuous support and structural strength, while the second region has wider spacing to prevent interference between support bars during the winding process. This segmentation allows the structure to simultaneously achieve both strength and interference prevention.
3Reliability
If the support part is made rigid to prevent deformation, then display module protection improves, but flexibility and windability around shaft deteriorate
Solution Approach 1:
The support part employs a thin film structure with strategically positioned support bars rather than a fully rigid construction. The thin film nature provides flexibility for winding around the shaft, while the support bars provide localized reinforcement to prevent deformation and protect the display module during the winding and unwinding processes.
Data Source
AI summary
A display device includes a display module including a display surface that displays an image, a support part disposed on a rear surface of the display module that faces away from the display surface, the support part including a resin layer and a plurality of support bars arranged in the resin layer in an extension direction of the resin layer, and a shaft that is connected to one end of the support part and has an axis of rotation that extends in a first direction, wherein the display module and the support part are windable around and unwindable from the shaft. A gap between support bars adjacent to each other among the support bars adjacent to the one end of the support part is greater than a gap between support bars adjacent to each other among the support bars adjacent to an opposite end of the support part.