Electrostatic Screen State Detection for Bendable Displays
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Solution Overview
Problem
Existing screen state detection methods for foldable and rollable displays are complex, consume high power, and suffer from noise interference in the environment, making them inefficient for determining the open or closed state of bendable displays.
Innovation Solution
A device and method utilizing an electrostatic charge variation sensor with a stimulus electrode and a receiving electrode to detect electrostatic charge variations, decoding the sequence to determine if the display is in an open or closed state, providing a low-cost and low-power solution by transmitting a key signal and measuring its reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If capacitive sensing, switch mechanisms, magnetic and optical solutions are used for screen state detection, then detection capability is achieved, but device complexity increases
Solution Approach 1:
The patent combines the stimulus electrode and receiving electrode into a single electrostatic charge variation sensor assembly, merging multiple detection functions into one integrated component that measures electrostatic charge variations to determine screen state
Solution Approach 2:
The electrostatic charge variation sensor serves multiple functions: it detects the presence of the key signal, determines screen state (open/closed), and provides noise immunity, making one component perform what previously required multiple separate systems
2Measurement precision
If traditional screen state detection methods are used, then detection accuracy is maintained, but power consumption increases
Solution Approach 1:
The stimulus electrode transmits the key signal periodically rather than continuously, allowing the receiving electrode to detect electrostatic charge variations at specific intervals, which reduces overall power consumption while maintaining detection accuracy
Solution Approach 2:
The electrostatic charge variation sensor utilizes the natural electrostatic field interactions between electrodes and the bendable display structure itself, rather than requiring active power-consuming sensors, enabling passive detection that consumes minimal energy
3Reliability
If conventional detection techniques are used, then detection function is provided, but noise interference increases
Solution Approach 1:
The electrostatic charge variation acts as an intermediary signal that mediates between the transmitted key signal and the detected screen state, allowing the system to detect state changes through electrostatic field variations that are less susceptible to environmental noise compared to direct electrical or optical signals
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 effectively determines the screen state with reduced power consumption and noise interference, offering a reliable method for detecting whether a bendable display is open or closed, suitable for use in foldable and rollable devices.
Implementation Method 1
an electrostatic charge variation sensor that measures the variation of electrostatic charge received by the receiving electrode
Data Source
AI summary
The present disclosure is directed to devices and methods for performing screen state detection. The screen state detection may be used in conjunction with any device with a bendable display. The device and method utilizes an electrostatic charge variation sensor to detect whether the display is in an open state or a closed state.