Foldable Display Panel Bending Angle Detection via Pressure Sensors
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Solution Overview
Problem
Current foldable display devices cannot accurately detect the folding degree during the bending process, leading to potential display errors and mis-touch issues.
Innovation Solution
A display panel with a bending region and at least three pressure-sensitive devices, connected to a detection circuit via detection lines, which generates and interprets detection signals to determine the bending angle and correct for mis-touch operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If foldable display devices are designed with bending regions to enable flexibility, then adaptability and versatility are improved, but measurement precision of bending angle deteriorates
Solution Approach 1:
The display panel is divided into a bending region and a rigid region, with pressure-sensitive devices specifically positioned in the bending region to detect local deformation characteristics. This segmentation allows the flexible display to maintain accurate bending angle measurement by focusing detection capabilities where deformation occurs.
Solution Approach 2:
Pressure-sensitive devices are introduced as intermediary elements between the bending display structure and the detection system. These devices convert mechanical deformation into detectable signals, enabling accurate bending angle measurement without directly interfering with the flexibility of the display.
2Measurement precision
If pressure-sensitive devices are added to detect bending angle, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The pressure-sensitive devices are integrated into the thin-film structure of the display panel, maintaining the flexible and compact design. This approach allows accurate bending detection without adding significant structural complexity or rigid components that would compromise flexibility.
Solution Approach 2:
The pressure-sensitive devices serve multiple functions: detecting bending angle, determining bending direction, and enabling touch input differentiation. This multi-functionality reduces the need for separate detection systems, thereby limiting the increase in device complexity while improving measurement precision.
3Measurement precision
If multiple pressure-sensitive devices are positioned symmetrically around the bending axis, then measurement precision and reliability are improved, but device complexity increases
Solution Approach 1:
While the patent describes symmetric positioning of pressure-sensitive devices, the underlying principle allows for asymmetric configurations depending on specific application requirements. The key is that devices are positioned to capture the bending characteristics, whether symmetrically or asymmetrically, based on the bending axis orientation and display geometry.
Solution Approach 2:
The detection circuit receives signals from multiple pressure-sensitive devices and processes them to determine bending angle and direction. This feedback mechanism allows the system to accurately interpret the combined signals from multiple devices, maintaining measurement precision while managing the complexity through intelligent signal processing.
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 accurate detection of the bending angle and correction of display errors, enhancing the stability and user experience of foldable display devices by preventing mis-touch influences and improving image visibility.
Implementation Method 1
the at least three pressure-sensitive devices are graphene sensors, resistance strain gauge sensors, semiconductor strain gauge sensors, piezoresistive pressure sensors, optical sensors, infrared sensors, ultrasonic sensors, inductive sensors or capacitive sensors
Data Source
AI summary
The present disclosure provides a display panel, a method for detecting the same, and a display device. The display panel includes a bending region and a rigid region. The display panel includes at least three pressure-sensitive devices inside, and the at least three pressure-sensitive devices are at least partially overlapped with the bending region respectively. The display panel further includes a detection circuit, the detection circuit is electrically connected to the at least three pressure-sensitive devices via detection lines, and the detection circuit is configured to receive detection signals generated by the at least three pressure-sensitive devices.