Flexible Display Shape-Memory Wire Deformation Control
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Solution Overview
Problem
Flexible displays with shape-memory alloy wires can be easily carried and unfolded, but they often cannot be deformed into a suitable shape for storage simultaneously.
Innovation Solution
A display device with a flexible substrate and shape-memory alloy wires, where the wires are divided into groups with different shape-memory properties, allowing for controlled deformation by heating specific portions to change the display's shape for storage or use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the entire display is simultaneously deformed using shape-memory alloy wires, then the display can be folded or rolled for carrying, but the display cannot be brought into a shape suitable for storage
Solution Approach 1:
The shape-memory alloy wires are divided into multiple groups (first group, second group, third group) with different shape-memory characteristics. Each group contains wires with different original shapes (bent or straight) and different transformation temperatures, enabling sequential deformation of the display into different configurations including storage shapes
Solution Approach 2:
Different regions of the display have wires with locally optimized properties. Wires in different groups are distributed to different areas of the flexible substrate, with each region's wires having specific shape-memory characteristics tailored to achieve local deformation patterns necessary for various display configurations
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
Enables the display device to be properly deformed into suitable shapes for storage or use by selectively heating wires with shape-memory effects, allowing for efficient folding, rolling, or unwinding.
Implementation Method 1
the plurality of wires each include a first portion extending in the first direction and exhibiting a shape-memory effect
Implementation Method 2
the plurality of wires are energized and heated in ascending or descending order of distance of the positions of the first portions from the edge of the flexible substrate
Data Source
AI summary
A display device includes: a flexible substrate having a shape extending in a first direction and a second direction crossing each other; a display element layer in which light-emitting elements are arranged; a sealing layer sealing the display element layer; and wires each including a first portion extending in the first direction and exhibiting a shape-memory effect, the wires being divided into groups depending on which the position of the first portion in the first direction is different. The wire of at least one group further includes a second portion not exhibiting the shape-memory effect and extending in the first direction from the first portion so as to approach an edge of the flexible substrate. The wires are energized and heated in ascending or descending order of distance of the positions of the first portions from the edge of the flexible substrate.