Rollable Display Support Bars for Winding Stress Control
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Solution Overview
Problem
Flexible display devices, such as rollable displays, experience stress when the display module is wound on a roller, leading to potential defects and degradation of surface quality.
Innovation Solution
A display device design featuring a support layer with varying widths of support bars that gradually increase from a central portion to the edges, optimizing strain and support force distribution across the display module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display module is wound on a roller, then the display device becomes flexible and portable, but stress occurs in the display module causing defects and surface quality degradation
Solution Approach 1:
The support layer is designed with non-uniform structure where the width of support bars varies across different regions. Specifically, the support layer includes a first region with a first width and a second region with a second width different from the first width, allowing different portions of the display module to receive appropriate levels of support tailored to their specific stress requirements during rolling operations.
2Ease of manufacture
If uniform support is provided across the display module, then manufacturing is simple, but stress distribution is not optimized leading to surface quality issues
Solution Approach 1:
The support layer is designed with non-uniform structure where the width of support bars varies across different regions. Specifically, the support layer includes a first region with a first width and a second region with a second width different from the first width, allowing different portions of the display module to receive appropriate levels of support tailored to their specific stress requirements during rolling operations.
3Reliability
If the support layer has varying widths in different regions, then stress is optimized and surface quality improves, but the support structure becomes more complex
Solution Approach 1:
The support layer is designed with non-uniform structure where the width of support bars varies across different regions. Specifically, the support layer includes a first region with a first width and a second region with a second width different from the first width, allowing different portions of the display module to receive appropriate levels of support tailored to their specific stress requirements during rolling operations.
Solution Approach 2:
The support layer is divided into multiple regions (first region and second region) with distinct width characteristics. This segmentation allows each region to be optimized independently for its specific functional requirements, managing complexity through modular regional design rather than a completely uniform or entirely customized structure.
Data Source
AI summary
A display device includes a display module, a support layer disposed below the display module, a support layer disposed below the display module, and including a rolling portion wound and unwound in a first direction, where the rolling portion includes a central portion, a first region between a first edge of the rolling portion and the central portion, and a second region between a second edge of the rolling portion and the central portion, a first support bar disposed in the central portion, second support bars disposed in the first region, and third support bars disposed in the second region. A width of each of the second support bars in the first direction is greater than a width of the first support bar, and widths of the second support bars in the first direction gradually increase as being closer to the first edge.