Foldable Screen Folding Angle Detection via Touch Chip Integration
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Solution Overview
Problem
Existing methods for detecting the folding angle of a foldable screen in electronic devices face challenges such as interference from external magnetic fields, occupation of internal space, and increased costs, while also being prone to environmental influences and reduced accuracy.
Innovation Solution
A method utilizing a touch chip to detect the folding angle of a foldable screen by acquiring detection data from specific detection channels, differentiating this data to reduce environmental interference, and using functions to represent the relationship between the differential data and the folding angle, thereby improving detection accuracy and eliminating the need for additional space or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a touch chip is used to detect folding angle, then detection accuracy is improved and environmental interference is reduced, but device complexity increases
Solution Approach 1:
The patent combines the folding angle detection function with the existing touch chip, merging two functions into a single component. The touch chip processes both touch input signals and folding angle detection signals, eliminating the need for a separate detection device and reducing overall system complexity despite the enhanced functionality.
Solution Approach 2:
The touch chip is designed to perform multiple functions: traditional touch input detection and folding angle detection. By making the touch chip universal, the patent avoids adding dedicated hardware for folding angle detection, thus improving measurement precision without proportionally increasing device complexity.
2Reliability
If detection channels are placed in non-bending regions, then coupling capacitor interference is reduced, but detection signal strength decreases
Solution Approach 1:
The patent applies different detection strategies to different regions of the touch panel. Detection channels are strategically placed in non-bending regions where coupling capacitor interference is minimal, ensuring stable detection. The system compensates for the weaker signal by using differential calculation methods that enhance the extracted folding angle information despite the lower signal strength.
3Reliability
If differential calculation is performed on detection data, then environmental interference is reduced, but calculation complexity increases
Solution Approach 1:
The system uses differential calculation as a feedback mechanism to continuously compensate for environmental interference. By comparing detection data from adjacent channels and calculating differences, the system dynamically eliminates common-mode noise and environmental effects, improving reliability despite the additional computational step.
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 solution effectively detects the folding angle of a foldable screen with high accuracy, is not easily influenced by external environments, occupies no internal space of the electronic device, and does not incur additional costs.
Implementation Method 1
a coupling capacitor may be formed between detection channels within the two non-bending regions, thereby affecting data outputted from the detection channels
Data Source
Figure 1~2(b)
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AI summary
The present disclosure provides a method for detecting a folding angle of a foldable screen, a touch chip, a touch panel, and an electronic device, thereby effectively detecting a folding angle of a foldable screen of the electronic device. The method includes: acquiring detection data of a particular detection channel in a touch panel, where the touch panel includes a bending region extending along a first direction and a non-bending region distributed on both sides of the bending region along a second direction, the second direction is perpendicular to the first direction, and the particular detection channel is a first detection channel that is closest to the bending region or is located within the bending region among a plurality of first detection channels parallel to the first direction; and determining the folding angle of the foldable screen according to the detection data of the particular detection channel.