Rollable Display Support Structure for Wrinkle-Free Unrolling
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Solution Overview
Problem
Conventional rollable electronic devices experience distortion and reduced quality due to wrinkles in the display region when unrolled, affecting their performance and lifespan.
Innovation Solution
A rollable display device with a substrate, light emitting units, and a deformable layer where the deformable units extend beyond the light emitting layer in the unrolled status, adjusting Young's modulus to minimize wrinkles and enhance flexibility, featuring a transforming method to optimize the device's status between rolled and unrolled states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display region is made flexible and rollable, then the device can be transformed between rolled and unrolled statuses, but wrinkles are caused in the display region when unrolled, leading to distortion and reduced quality
Solution Approach 1:
The support structure is divided into multiple deformable units arranged in an array, each capable of independent deformation. This segmentation allows localized adjustment of the support structure to match the display region's curvature during rolling while maintaining planarity during unrolled operation, preventing wrinkles and distortion
Solution Approach 2:
The deformable units are configured to dynamically change their deformation state based on the device's operational mode. When rolled, the units deform to provide flexible support; when unrolled, they return to their initial state to maintain display flatness, enabling the display region to transform between statuses without quality degradation
2Reliability
If the deformable layer is positioned to extend beyond the light emitting layer, then adequate support is provided to reduce wrinkles, but the device structure becomes more complex
Solution Approach 1:
The deformable units are positioned specifically at locations corresponding to the display region's support needs, with at least some units extending beyond the light emitting layer's boundaries. This localized placement provides targeted support where wrinkles are most likely to form without unnecessarily complicating the overall device structure
Solution Approach 2:
The deformable units are integrated within the display structure's layered configuration, with the support structure nested between the light emitting layer and the back plane. This nesting approach incorporates the support function into the existing device architecture rather than adding external components, reducing overall structural complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces wrinkles and improves the quality and lifespan of rollable electronic devices by providing adequate support in the unrolled state while facilitating easy rolling, thereby enhancing user experience and device durability.
Implementation Method 1
adjusting Young's modulus to minimize wrinkles and enhance flexibility
Data Source
AI summary
A rollable display device is unrollable in a direction, wherein the rollable display device includes a substrate, a plurality of light emitting units and a plurality of deformable units. The light emitting units define a light emitting layer on a surface of the substrate. The deformable units define a deformable layer on an opposite surface of the substrate. An edge of an unrolled portion of the deformable layer extends beyond an edge of the light emitting layer in the direction in an unrolled status. The direction is parallel to a longitudinal side of the rollable display device, the substrate extends beyond the light emitting layer, and the deformable units are aligned along the direction.