Pseudo Power-Off State for Mobile Phone Time Display
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Solution Overview
Problem
Mobile phones cannot display time in a power-off state, which is inconvenient and can cause electromagnetic interference, and existing solutions do not address the issue of radio frequency signal generation during standby, leading to safety and power consumption concerns.
Innovation Solution
A method that introduces a pseudo power-off state allowing the mobile phone to display time without generating radio frequency signals by setting a pseudo power-off identifier, obtaining and displaying time values from a physical layer clock, and managing tasks to ensure low power consumption and no interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the mobile phone is in standby state to display time, then time display function is available, but radio frequency signals are generated causing electromagnetic interference
Solution Approach 1:
The mobile phone operation states are segmented into three distinct modes: normal standby state, pseudo power-off state, and complete power-off state. The pseudo power-off state is specifically designed to separate the time display function from radio frequency signal generation, allowing the phone to display time without generating harmful electromagnetic interference.
Solution Approach 2:
The system changes the operational parameters of the mobile phone by introducing a pseudo power-off state where specific subsystems are activated or deactivated. In this state, the time display subsystem remains active while the radio frequency transmission subsystem is deactivated, thereby changing the electromagnetic emission parameters from high (standby) to low (pseudo power-off).
2Object-generated harmful factors
If the mobile phone is shut down to avoid radiation and save power, then electromagnetic interference and power consumption are reduced, but time display function is lost
Solution Approach 1:
The mobile phone system dynamically adjusts its operational state based on user needs and environmental conditions. The pseudo power-off state provides a dynamic intermediate mode between full standby and complete shutdown, allowing the system to adaptively balance radiation reduction with time display functionality. Users can transition between states as needed, making the system flexible and responsive.
Solution Approach 2:
The pseudo power-off state acts as an intermediary state between normal standby and complete power-off. This intermediate state mediates between the conflicting requirements of maintaining time display capability and reducing radio frequency radiation, providing a compromise solution that satisfies both demands simultaneously.
3Ease of operation
If the mobile phone is in standby state, then time can be displayed, but power consumption increases
Solution Approach 1:
The power consumption is segmented by separating the time display function from the radio frequency subsystem. In the pseudo power-off state, only the minimal necessary subsystems (display and clock) remain active, while power-intensive radio frequency components are deactivated, thereby segmenting and reducing overall power consumption while maintaining time display capability.
Solution Approach 2:
The system changes power consumption parameters by transitioning to a pseudo power-off state where power supply to specific subsystems is adjusted. The radio frequency subsystem receives reduced or zero power while the display and clock subsystems maintain operational power levels, thereby optimizing the power consumption profile to match the actual functional requirements.
Data Source
AI summary
The present invention relates to a method for time display on a mobile phone. The method includes the following steps: step 1, in a standby state, set a pseudo power off identifier for the mobile phone; step 2, when the mobile phone identifies that the pseudo power off identifier is active, the mobile phone comes into a pseudo power off state; step 3, the mobile phone continually obtains a new time value through a physical layer clock, and displays the new time value on a LCD; and step 4, the mobile phone quits the pseudo power off state, and restarts. The present invention enables the mobile phone to display time without radio frequency signal by setting a third state, i.e., the pseudo power off state.