Terminal Anti-Lost Lock Screen Volume Control
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Solution Overview
Problem
Existing terminal anti-lost methods fail to accurately locate a lost device once the user discovers it is missing, leading to difficulties in recovery.
Innovation Solution
The method involves detecting if the terminal is in a lock screen state and, if so, skipping instructions to decrease volume or prevent carrier signal reception, instead increasing volume and playing an alarm tone using the loudspeaker, and deactivating headset insertion to maintain loudspeaker functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the terminal receives instructions to decrease volume or prevent carrier signal reception, then the terminal can be stealthily disabled, but the alarm tone cannot be played to locate the lost device
Solution Approach 1:
The system performs preliminary detection of the lock screen state before executing volume control or signal blocking instructions. This preliminary action ensures that anti-lost measures (playing alarm tone, increasing volume) are taken in advance before the thief can successfully disable the terminal, thereby preventing the harmful effect of stealth disabling while maintaining the ability to locate the lost device
Solution Approach 2:
The system applies preliminary anti-action by detecting the lock screen state and preemptively counteracting the thief's instructions to decrease volume or block carrier signals. When the lock screen state is detected, the system executes opposite actions (increasing volume, ensuring carrier signal reception) to prevent the terminal from being stealthily disabled, thus resolving the contradiction between stealth disabling and location accuracy
2Reliability
If the terminal is in lock screen state, then security is maintained, but normal volume control instructions cannot be executed
Solution Approach 1:
The lock screen state detection mechanism acts as an intermediary between the received instruction and the execution action. This intermediary detects whether the terminal is in lock screen state and mediates the execution decision: allowing normal volume control execution when unlocked, but triggering anti-lost measures when locked, thus maintaining both security and operational flexibility
Solution Approach 2:
The system changes the execution parameter based on the lock screen state detection. When the lock screen state is detected, the execution parameter changes from normal volume control to anti-lost mode (playing alarm tone, increasing volume), resolving the contradiction between maintaining security and enabling normal operation by dynamically adjusting the execution behavior
Data Source
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AI summary
Embodiments of the present invention disclose a terminal anti-lost method and a terminal, to resolve a problem that a lost terminal is difficult to find when a user discovers in a timely manner that the terminal is lost. The method in the embodiments of the present invention includes: first detecting, by the terminal when receiving a specific instruction, whether the terminal is currently in a lock screen state, where the specific instruction represents an instruction of controlling the terminal to decrease volume and/or an instruction of preventing the terminal from receiving a carrier signal; and skipping executing, by the terminal, the instruction when it is determined that the terminal is in the lock screen state, and controlling the terminal to increase the volume and/or play an alarm tone by using a loudspeaker.