Flexible Display Strain Gauge Integration for Deformation Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing flexible display apparatuses face limitations in sensing deformation, such as thickness increase and limited curvature radius, when using additional sensors like ITO films or hall sensors, which restrict their ability to accurately detect bending extent and direction.
Innovation Solution
Incorporating strain gauges as shape deformation sensors integrated into the connection lines of both the flexible display panel and touch screen panel, which vary electrical resistance with deformation, allowing precise deformation sensing without adding extra thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an additional ITO film is adhered to sense deformation, then deformation sensing capability is improved, but the thickness of the flexible display apparatus increases
Solution Approach 1:
The patent combines the sensing function with the existing connection lines by forming the same material layer to serve dual purposes: electrical connection and deformation sensing. This eliminates the need for separate sensing films while maintaining sensing capability, thereby preventing thickness increase.
2Measurement precision
If an additional ITO film is adhered to sense deformation, then deformation sensing capability is improved, but the radius of curvature allowed during folding operation is limited
Solution Approach 1:
The sensing function is merged into the existing flexible connection lines, eliminating additional layers that would restrict bending. The connection lines themselves serve as sensors, allowing the display to be folded or bent without radius constraints.
3Measurement precision
If a hall sensor structure is used to sense deformation, then deformation sensing is enabled, but sensing is limited to specific conditions and directions
Solution Approach 1:
The connection lines are designed to serve multiple functions: electrical connection, touch input transmission, and deformation sensing in all directions. This multi-functional design eliminates the directional limitations of hall sensors and provides universal sensing capability across the entire display surface.
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 precise deformation sensing and prevents thickness increase, allowing the flexible display apparatus to accurately measure bending extent and direction while maintaining a thin and lightweight design.
Implementation Method 1
a shape deformation sensor which varies in electrical resistance with deformation of the flexible display panel
Data Source
AI summary
Provided is a flexible display apparatus. A shape deformation sensor is formed in at least one of a first plurality of connection lines of a flexible display panel and a second plurality of connection lines of a touch screen panel. The shape deformation sensor is configured to sense a shape deformation of the flexible display panel.