Power Control Signal Duration Detection for Forced Shutdown
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Solution Overview
Problem
Force shutdown of electronic devices often prevents the BIOS from setting necessary mechanisms like WOL, leading to their loss of effectiveness due to insufficient time for initialization before power is cut off.
Innovation Solution
A method and circuit board that detect the duration of a power control signal and generate an interrupt signal if it exceeds a threshold, allowing the processing module to set preset mechanisms before shutdown, ensuring these mechanisms remain active even during forced shutdowns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power switch is pressed continuously for several seconds to force shutdown, then the electronic device can be shut down immediately, but the BIOS chip does not have enough time to set the network control element and other related units, causing the WOL mechanism to lose effectiveness
Solution Approach 1:
The patent applies preliminary action by detecting the power switch press duration and generating an interrupt signal before the power is actually cut off. This interrupt signal allows the BIOS chip to complete the setting of the network control element and other units before shutdown, ensuring the WOL mechanism remains effective even during forced shutdown scenarios.
2Loss of time
If the power is cut off directly during forced shutdown, then the shutdown is immediate and efficient, but mechanisms that need to be set before shutdown by the BIOS chip lose effectiveness
Solution Approach 1:
The patent uses feedback by monitoring the duration of the power control signal and using this information to determine when to generate an interrupt signal. This feedback mechanism ensures that the BIOS chip receives sufficient time to configure necessary mechanisms before power cutoff, while still enabling rapid shutdown when the press duration exceeds the threshold.
3Reliability
If the BIOS chip is given enough time to set mechanisms before shutdown, then the WOL mechanism remains effective, but the shutdown process becomes slower
Solution Approach 1:
The patent applies dynamics by making the shutdown process adaptive based on the power switch press duration. When the press duration is short, the system initiates a normal shutdown sequence that allows BIOS configuration time. When the press duration exceeds the threshold, the system generates an interrupt signal that enables rapid shutdown while still preserving WOL effectiveness, thus dynamically adjusting the shutdown behavior to balance speed and reliability.
Data Source
AI summary
The invention provides a method, an element and a circuit board for controlling an electronic device to be shut down. The method according to the invention includes the steps as follows. First, a power control signal is received, and the duration of the power control signal at a preset signal level is calculated. Then, whether the duration is greater than a threshold value is determined. If yes, an interrupt signal is generated and transmitted to a processing module of the electronic device to drive the processing module to set the preset mechanism of the electronic device according to the interrupt signal.