Bidirectional Bending OLED Backplane via Memory Metal
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Solution Overview
Problem
Current bendable OLED display technologies can only bend in one direction, either inwardly or outwardly, lacking the ability to be flexible towards both front and back sides.
Innovation Solution
A bendable backplane structure comprising a first and second flexible layer with metal sections and extensions, where the metal sections are doped with memory metal and have overlapping extensions with varying thicknesses, allowing for flexibility and supportability to bend towards both sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bending mechanism is used to achieve bendability, then the display can be bent in one direction, but it cannot be bent toward both front and back sides
Solution Approach 1:
The patent uses flexible layers (first and second flexible layers) with integrated metal sections that have varying thicknesses to enable bidirectional bending. The flexible layers act as the bending substrate, allowing the display to curve toward both front and back sides without requiring complex mechanical bending mechanisms.
Solution Approach 2:
The metal sections have different thicknesses (first thickness for first metal section, second thickness for second metal section) which changes the structural parameters to enable bidirectional bending. By adjusting the thickness parameters of different metal sections, the display achieves flexible bending capability in multiple directions.
2Strength
If the metal layer thickness is increased to improve structural support, then bending flexibility is reduced
Solution Approach 1:
Different metal sections have different thicknesses tailored to their specific functional requirements. The first metal section has a first thickness optimized for its region, while the second metal section has a second thickness optimized for its region. This local differentiation provides structural support where needed while maintaining bending flexibility where required.
Solution Approach 2:
The display structure combines flexible layers with metal sections of varying thicknesses to create a composite structure. This composite design integrates the flexibility of the flexible layers with the structural support of the metal sections, achieving both bending capability and structural integrity simultaneously.
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 OLED display assembly to be bendable towards both front and back sides, reducing unintended deformation and enhancing bending performance while maintaining structural integrity.
Implementation Method 1
the parts of the first metal section and the second metal section, which are located between the second area and the fifth area, are doped with a memory metal
Data Source
AI summary
A bendable backplane structure is provided. The bendable backplane structure includes a first flexible layer, and a metal layer which is disposed on the first flexible layer and includes a first metal section and a second metal section, wherein the first metal section includes a first extension, the second metal section includes a second extension, and the first extension is disposed corresponding to the second extension in a lamination direction from the first flexible layer toward the metal layer. The bendable backplane further also includes a second flexible layer which is disposed on the metal layer.