Electronic Timepiece Daylight Saving Time Auto-Selection
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Solution Overview
Problem
Users of electronic timepieces face extra work in setting daylight saving time settings when moving between areas with different rules, as conventional methods require searching for and updating daylight saving time implementation rules from standard radio waves.
Innovation Solution
An electronic timepiece with a clocking unit, daylight saving time application unit, radio wave reception unit, storage unit, and information selection unit that applies daylight saving time information based on positional information, using pre-stored rules and radio wave data to automatically select the appropriate settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If users manually search for and update daylight saving time implementation rules from standard radio waves, then the timepiece can accurately reflect local daylight saving time rules, but users must perform extra work every time they move between areas with different rules
Solution Approach 1:
The patent pre-stores daylight saving time implementation rules for multiple areas in a storage unit before the user needs to use the timepiece in different locations. When the user moves to a new area, the system automatically selects and applies the pre-stored rules for that area without requiring the user to search for or manually update the rules, thus maintaining accuracy while eliminating manual workload.
Solution Approach 2:
The timepiece automatically determines the user's current position, retrieves the corresponding pre-stored daylight saving time rules, and applies them without user intervention. The system serves itself by autonomously selecting between different time rules based on location, eliminating the need for users to manually search for and update settings when moving between areas.
2Ease of operation
If the timepiece uses pre-stored daylight saving time implementation rules, then users can quickly obtain correct time settings without searching for latest rules, but the rules may become outdated if not updated
Solution Approach 1:
The patent incorporates a mechanism where the timepiece receives radio waves containing current daylight saving time implementation information from external sources. The system compares this received information with the pre-stored rules and automatically updates the stored rules when discrepancies are detected or when newer information is received, ensuring both quick access and up-to-date accuracy.
Solution Approach 2:
The system maintains a database of pre-stored daylight saving time rules for various areas, allowing immediate retrieval and application when the user is in a particular location. This preliminary preparation ensures fast response time while the feedback mechanism keeps the stored rules current through periodic updates from received radio wave information.
Data Source
AI summary
An electronic timepiece including: a clocking unit which counts current date and time; a daylight saving time application unit which applies daylight saving time information corresponding to positional information to the date and time counted by the clocking unit; a radio wave reception unit which receives radio waves including daylight saving time implementation information of a predetermined area; a daylight saving time information acquisition unit which acquires the daylight saving time implementation information from the received radio waves; a storage unit in which a daylight saving time implementation rule of each area in the world is stored in advance; and an information selection unit which selects, as the daylight saving time information, one of the daylight saving time implementation information and the daylight saving time implementation rule corresponding to a current position on the basis of the current position and the daylight saving time implementation information.