Electronic Timepiece Dual Correction Mode Power Optimization
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Solution Overview
Problem
Existing electronic timepieces that adjust time based on GPS signals require frequent positioning processes, leading to increased power consumption and reduced battery life, especially in small devices like wristwatches, impairing user convenience when crossing time zones.
Innovation Solution
An electronic device with a receiver and time display unit that allows manual selection between first and second time correction processing, where the first processing adjusts time based on satellite signals without calculating position, and the second processing calculates position to adjust time, reducing power consumption and improving user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the electronic device regularly recalculates time based on positioning process to adjust time zone changes, then the time adjustment accuracy is improved, but the power consumption increases and battery duration is shortened
Solution Approach 1:
The patent implements dynamic adjustment of time correction frequency based on device state and user needs. The system can switch between automatic time correction (higher power consumption) and manual time correction (lower power consumption) modes, and adjust the frequency of automatic corrections based on whether the device has moved to a new time zone, thereby optimizing the balance between time adjustment accuracy and power consumption.
Solution Approach 2:
The patent changes the parameter of time correction frequency dynamically. Instead of fixed regular recalculations, the system adjusts how often time correction occurs based on conditions such as device movement detection, user settings, and battery status. This allows the system to maintain time accuracy when needed while reducing power consumption during stationary periods or when using power-saving modes.
2Extent of automation
If the electronic device performs positioning process to calculate position and adjust time, then the automatic time zone adjustment is improved, but the reception time is extended and power consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing time zone information along with positioning data. When the device needs time zone adjustment, it can retrieve pre-stored time zone data instead of performing complete real-time positioning calculations, significantly reducing reception time and power consumption while maintaining automatic adjustment capability.
Solution Approach 2:
The patent extracts only the necessary time zone information from the full positioning process. Instead of performing complete position calculation every time, the system extracts and uses only the time zone data needed for time adjustment, reducing the computational burden and reception time while maintaining automatic time zone adjustment functionality.
3Use of energy by moving object
If the electronic device uses standard time signals for time adjustment, then the power consumption is reduced, but the geographical coverage is limited
Solution Approach 1:
The patent implements multi-functionality by enabling the device to use multiple time correction methods: standard time signals for routine adjustments (low power) and satellite positioning signals for global coverage (higher power but broader geographical capability). The system can switch between these methods based on location and user needs, achieving both power efficiency and worldwide adaptability.
Solution Approach 2:
The patent dynamically selects between standard time signals and satellite positioning-based time correction based on device location, movement status, and user preferences. This dynamic approach allows the system to use power-efficient standard signals when available while maintaining the capability to use satellite positioning for global coverage when needed, thereby achieving both low power consumption and wide geographical adaptability.
Data Source
AI summary
A control method is provided for an electronic device that has a receiver to receive a satellite signal, and a time display unit to display time. The method includes selecting, by manual operation using a crown or a button, a first time correction processing or a second time correction processing. When the first time correction processing is selected, the control method further includes receiving a satellite signal, acquiring time information based on the received satellite signal, and correcting the displayed time based on the acquired time information. When the second time correction processing is selected, the control method further includes receiving a satellite signal, calculating the position of the electronic device based on satellite orbit information contained in the received satellite signal, and correcting the displayed time based on the calculated position.