Power Supply Mode Switching for Tablet Accidental Power-Off Prevention
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Solution Overview
Problem
In Tablet PCs, accidental pressing of the power button often leads to immediate power-off, disrupting user operations and reducing usability in intelligent desktop mode.
Innovation Solution
A power supply mode switching method that detects a mode switching signal to switch between power supply modes, triggering power signals only after a user operation is confirmed, depending on the angle of the display screen relative to the horizontal plane, preventing immediate power-off in accidental button presses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the power button is set to immediately power off the Tablet PC when pressed in power-on state, then the power-off operation is fast and responsive, but accidental pressing disrupts user operations and reduces usability
Solution Approach 1:
The patent applies dynamics by making the power button's response behavior change based on the device's operating mode. In intelligent desktop mode, the power button requires continuous pressing for a set duration before triggering power-off, while in other modes it responds immediately. This dynamic adjustment of button response characteristics resolves the contradiction between fast power-off response and prevention of accidental power-off in multi-user scenarios.
2Device complexity
If the power button triggers power-off immediately in intelligent desktop mode, then the power management is simple and direct, but it causes disruption to current user operations
Solution Approach 1:
The system dynamically adjusts the power button's trigger mechanism based on the detected operating mode. When intelligent desktop mode is detected, the system activates a continuous pressing detection mechanism that requires the button to be held for a predetermined duration before triggering power-off. This dynamic behavior adds conditional complexity to the power management logic but significantly improves operation continuity by preventing accidental power-off disruptions.
3Reliability
If continuous pressing detection is implemented for power button, then accidental power-off is prevented, but the power-off operation becomes slower and more complex
Solution Approach 1:
The patent implements dynamic behavior where the power button requires continuous pressing detection only in intelligent desktop mode, while maintaining immediate response in other modes. This selective application of continuous pressing detection prevents accidental power-off in multi-user scenarios while minimizing the impact on power-off execution speed in single-user scenarios, thus resolving the contradiction between reliability and speed.
Data Source
AI summary
A power supply mode switching method and apparatus applied to an electronic device are described. The method includes detecting a mode switching signal of the electronic device; switching a power supply mode of the electronic device from a first power supply mode to a second power supply mode if the mode switching signal detected indicates to switch the electronic device from a first mode to a second mode; switching the power supply mode of the electronic device from the second power supply mode to the first power supply mode if the mode switching signal detected indicates to switch the electronic device from the second mode to the first mode. The power supply mode switching method makes the electronic device not enter into the power-off mode immediately when the user presses the power button by accident in the second mode of the electronic device.