Flexible Display Bending Detection via Capacitance Analysis
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Solution Overview
Problem
The increasing manufacturing costs associated with incorporating additional sensors to detect the bending and degree of flexible display devices pose a challenge, as existing methods require separate sensors to determine bending, which is not economically viable.
Innovation Solution
A method and structure that utilize capacitance changes detected by integrated touch and pressure-sensitive panels to determine bending, allowing the system to switch between bending and force touch modes without an additional sensor, by analyzing capacitance changes and determining whether they form a bending line or represent user input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional sensors are incorporated to detect bending of flexible display device, then bending detection capability is improved, but manufacturing cost increases
Solution Approach 1:
The existing touch panel and pressure-sensitive panel are made to serve dual functions: their primary function of detecting user touch input is maintained, and additionally they detect bending of the flexible display device by monitoring capacitance changes across the display area. This eliminates the need for separate bending sensors and reduces manufacturing costs.
Solution Approach 2:
The touch panel and pressure-sensitive panel utilize their own capacitance sensing capability to detect bending, without requiring external assistance from additional sensors. The system serves itself by using existing components for multiple detection purposes.
2Device complexity
If touch panel and pressure-sensitive panel are used for both touch detection and bending detection, then device complexity is reduced, but measurement precision may deteriorate
Solution Approach 1:
The display area is divided into multiple coordinate points, and capacitance changes are detected independently at each point. By analyzing the spatial distribution pattern of capacitance changes across different coordinates, the system can distinguish between bending (which affects multiple coordinates in a characteristic pattern) and user touch (which affects localized coordinates), thereby maintaining measurement precision while using integrated sensors.
Solution Approach 2:
The system continuously monitors capacitance changes and uses this feedback information to determine whether the flexible display device is bent or being touched. The control unit analyzes the pattern and magnitude of capacitance changes to accurately distinguish between bending and touch events, maintaining detection accuracy.
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
This approach allows for the detection of bending and bending degree in flexible display devices without additional sensors, reducing manufacturing costs while maintaining functionality, and enabling adaptive display modes based on detected capacitance changes.
Implementation Method 1
detecting a capacitance change with respect to each position of a display area
Data Source
AI summary
A flexible display device and a method of driving a flexible display device, in which the method of driving the flexible display device includes detecting a capacitance change with respect to at least some coordinates of a display area, determining whether bending is occurring through the detected capacitance change, and setting a driving mode in response to a result of the step of determining whether bending is occurring. The driving mode is converted into a bending mode when it is determined that bending is occurring, and the driving mode is set into a force touch mode when it is determined that bending is not occurring.