Electronic Device Power Control Switch for Exception Shutdown
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Solution Overview
Problem
Existing methods for electronic devices fail to implement effective shutdown after an exception event, leading to potential security risks due to continuous electrification of abnormal chips.
Innovation Solution
An electronic device with a control switch that detects exception events, such as unauthorized external signals, and generates a control signal to disconnect the power supply output channel, ensuring complete shutdown and preventing reactivation of abnormal chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic device starts a shutdown process when detecting an exception event and instructs the PM chip to power off, then the shutdown process is initiated, but the power supply remains in a power-on state and continuously supplies power to the PM chip, causing the electronic device to restart and the abnormal chip to remain electrified
Solution Approach 1:
The patent extracts the power supply control function from the PM chip by introducing a separate control switch between the power supply and the PM chip. This control switch is independently controlled by a detecting chip that monitors exception events, thereby separating the power control function from the original power management system and enabling effective shutdown without PM chip intervention.
Solution Approach 2:
The patent introduces a control switch as an intermediary component between the power supply and the PM chip. This control switch acts as a mediator that can completely disconnect power to the PM chip when exception events are detected, preventing the PM chip from receiving power and causing device restart, thus solving the ineffective shutdown problem.
2Reliability
If the PM chip powers off and the power supply continues to supply power to the PM chip, then the PM chip is reset and supplies power to other chips, but the electronic device restarts and security risks remain
Solution Approach 1:
The patent extracts the power cutoff function from the PM chip by placing a control switch in series between the power supply and the PM chip. The control switch is controlled by a detecting chip that monitors for exception events, enabling complete power disconnection from the PM chip and preventing any power that could cause restart or security issues.
Solution Approach 2:
The patent implements preliminary action by having the detecting chip monitor for exception events and activate the control switch to disconnect power before the PM chip can be reset or cause security issues. This proactive power disconnection prevents the problematic sequence of PM chip reset and device restart from occurring in the first place.
Data Source
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AI summary
An embodiment of the present invention discloses a method for protecting an electronic device, where the electronic device includes a control switch for controlling output of a power supply, and the method includes: detecting whether an exception event occurs, and if it is detected that an exception event occurs, generating a control signal for controlling the control switch; and controlling, based on the control signal, the control switch to disconnect an output channel of the power supply. Correspondingly, an embodiment of the present invention further discloses an electronic device. During implementation of the present invention, effective shutdown can be implemented after an exception occurs on an electronic device, thereby eliminating a potential security risk that an abnormal chip of the electronic device is continuously electrified after the electronic device shuts down because of an exception event.