Flexible Display Panel Bending Sensing for Precise Size Adjustment
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Solution Overview
Problem
Existing display devices with flexible display panels suffer from inaccurate state detection during size adjustment, as conventional sensors like Hall sensors can only detect the starting and endpoint positions, failing to accurately monitor the panel's state during sliding.
Innovation Solution
Integrate a series of flex sensors along the flexible display panel to detect bending degrees, outputting corresponding voltages that allow for precise determination of unfolding or contraction sizes by correlating voltage changes with bending angles and positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensors like Hall sensors are used to detect the flexible display panel state, then the device structure remains simple, but the detection accuracy is insufficient as they can only detect starting and endpoint positions
Solution Approach 1:
The flexible display panel is divided into multiple detection zones along the winding direction, with each zone containing a flex sensor. This segmentation allows the system to detect bending states at multiple discrete positions, transforming a single-point detection limitation into multi-point detection capability, thereby improving overall detection accuracy while maintaining manageable system complexity
Solution Approach 2:
The detection approach transitions from detecting only endpoint positions (1D) to detecting bending states across multiple positions along the winding direction (multi-dimensional). By arranging flex sensors at different locations along the panel's length, the system creates a spatial distribution of detection points that enables more comprehensive state monitoring
2Measurement precision
If multiple flex sensors are arranged along the winding direction to improve detection accuracy, then the detection precision increases, but the manufacturing complexity increases
Solution Approach 1:
Multiple flex sensors are integrated onto a single flexible display panel during the manufacturing process. By combining multiple sensing elements into one unified structure, the system achieves multi-point detection capability while streamlining the manufacturing process, as all sensors are fabricated together rather than assembled separately
Solution Approach 2:
The flex sensors are designed with uniform structure, shape, and size, and are arranged at regular intervals along the winding direction. This homogeneous arrangement simplifies the manufacturing process by using standardized components and consistent placement patterns, reducing the complexity that would otherwise arise from varying sensor specifications
3Adaptability or versatility
If flex sensors are integrated into the flexible display panel to enable accurate bending detection, then the detection capability improves, but the device structure becomes more complex
Solution Approach 1:
The flexible display panel itself serves as the substrate for mounting the flex sensors, eliminating the need for separate sensor mounting structures. The panel's flexible nature naturally accommodates the sensors during bending, and the sensors leverage the panel's own mechanical deformation to generate detection signals, thereby adding functionality without significant structural overhead
Solution Approach 2:
The flexible display panel performs dual functions: it serves as both the display surface and the mounting substrate for the flex sensors. This multi-functionality reduces the need for additional structural components, as the panel itself provides the mechanical foundation for the sensing system while maintaining its primary display function
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
Accurately detects the state of the flexible display panel during sliding, enabling stepless control and precise adjustment of display surface sizes, improving detection accuracy compared to previous technologies.
Implementation Method 1
a resistance value of the flex sensor is positively correlated with a bending degree of the flex sensor
Data Source
AI summary
The present disclosure provides a display apparatus. The display apparatus includes a reel, a flexible display panel, a detection assembly, and a plurality of flex sensors. The plurality of flex sensors are disposed on the flexible display panel and arranged along a winding direction of the flexible display panel. The flex sensors are configured to detect a change in a bending degree of the flexible display panel and output corresponding voltages according to the bending degree.