Stretchable Display Device With Interleaved Pixel Panels
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Solution Overview
Problem
Stretchable display devices experience a reduction in resolution when stretched due to increased intervals between pixels, which compromises their performance.
Innovation Solution
A stretchable display device design featuring a first and second stretchable display panel, where the second panel's pixels are positioned between the first panel's pixels when stretched, with a detector and controller to manage the driving time of the second panel's pixels based on modulus changes, maintaining resolution through strategic material properties and structural arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the stretchable display device is stretched, then the display area is expanded, but the resolution is reduced due to increased intervals between pixels
Solution Approach 1:
The display device is divided into two separate stretchable display panels (first and second panels). Each panel has its own pixels that can be independently controlled. When stretched, the second panel's pixels are positioned between the first panel's pixels, effectively doubling the pixel density and maintaining resolution while allowing the overall display area to expand.
Solution Approach 2:
The solution transitions from a single-layer pixel arrangement to a multi-layer stacked configuration. By positioning the second panel's pixels in a different spatial dimension (between the first panel's pixels when stretched), the system achieves higher effective pixel density without increasing the planar footprint, thus maintaining resolution during stretching.
2Shape
If the second stretchable substrate is made stiffer to maintain shape, then the flatness is improved, but the stretchability is reduced
Solution Approach 1:
The second stretchable substrate has non-uniform physical properties with different Young's moduli in different regions. The curved portions have higher Young's modulus to maintain shape stability when not stretched, while the central display region has lower Young's modulus to allow stretching. This local variation in material properties enables the substrate to simultaneously maintain flatness and stretchability.
Solution Approach 2:
The second stretchable substrate dynamically changes its shape and flatness based on the stretching state. When not stretched, it maintains a curved shape with higher flatness in certain regions. When stretched, it transitions to a flatter overall configuration, allowing the display panels to align properly while maintaining the necessary flexibility for stretching.
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 maintains resolution even when the display device is stretched by compensating for increased pixel intervals and ensuring the second panel's pixels are driven at optimal times, enhancing the display's performance and usability.
Implementation Method 1
the detector may measure a modulus of the second stretchable substrate. The driving time of the second pixels may be a time at which the modulus of the second stretchable substrate changes from a first gradient to a second gradient different from the first gradient.
Implementation Method 2
The detector may measure flatness of the second stretchable substrate. A time at which the second stretchable substrate becomes substantially flat may be the driving time of the second pixels.
Implementation Method 3
A Young's modulus of the first stretchable substrate may be less than a Young's modulus of the second stretchable substrate.
Data Source
AI summary
A stretchable display device includes a first stretchable display panel and a second stretchable display panel overlapping the first stretchable display panel. The first stretchable display panel includes a first stretchable substrate having a first length and a plurality of first pixels spaced apart from one another on the first stretchable substrate. The second stretchable panel includes a second stretchable substrate and a plurality of second pixels spaced apart from one another on the second stretchable substrate. The first stretchable substrate is stretchable in a first direction to have a second length. When the first stretchable substrate is stretched to have the second length, the second pixels are each positioned between the plurality of first pixels when viewed from a plan view.