Electronic Timepiece DST Rule Switching
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Solution Overview
Problem
Conventional electronic timepieces struggle to easily acquire and display local time information considering daylight saving time (DST) when users travel to new locations, especially when DST implementation rules change or are manually set, leading to confusion and inaccurate time displays.
Innovation Solution
An electronic timepiece with a clocking unit, storage for DST implementation rules, a setting selection unit, and a local time acquisition unit that includes a movement determination unit and DST implementation information switching unit, allowing for automatic DST rule application based on geographical position, ensuring accurate local time display by switching between DST rules when the user's location changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual daylight saving time setting is maintained, then user can control DST display at current location, but user cannot easily acquire accurate local time information when traveling to different areas
Solution Approach 1:
The electronic timepiece automatically detects geographical position changes and switches between manual setting mode and automatic DST rule application without user intervention. The system serves itself by monitoring position data and autonomously determining when to apply stored DST rules for the new location, eliminating the need for users to manually reconfigure settings during travel.
Solution Approach 2:
The system dynamically adjusts its operation mode based on detected position changes. When the user moves to a different geographical area, the timepiece transitions from maintaining manual DST settings to automatically applying location-specific DST rules, creating a flexible system that adapts to changing environmental conditions.
2Measurement precision
If automatic daylight saving time rule application is used, then local time is accurately reflected at different locations, but system complexity increases due to position detection and rule switching mechanisms
Solution Approach 1:
The electronic timepiece integrates multiple functions into a single system: it serves as both a conventional timepiece with manual DST settings and an automatic local time acquisition device. The position detection unit and DST rule storage are shared resources that support both manual and automatic operation modes, reducing overall system complexity through functional integration.
Solution Approach 2:
The control unit acts as an intermediary that manages the transition between manual setting mode and automatic DST rule application. It receives position information, compares it with stored DST rules, and automatically switches modes when appropriate, simplifying the interaction between the position detection unit and the time display system.
3Adaptability or versatility
If user manually switches daylight saving time implementation rules, then DST can be adjusted for specific locations, but user operation becomes cumbersome and error-prone
Solution Approach 1:
The system automatically performs the DST rule switching function that would otherwise require manual user input. By monitoring position changes and autonomously selecting the appropriate DST rules from stored data, the timepiece eliminates the need for users to manually configure DST settings at each new location, preventing errors and simplifying operation.
Data Source
AI summary
An electronic timepiece includes a clocking unit, a storage unit, a setting selection unit which selects, as daylight saving time implementation information, daylight saving time implementation rule or user setting that specifies whether to implement summer time, and a local time acquisition unit which acquires local time at a predetermined point. The local time acquisition unit includes a movement determination unit which determines, when the setting selection unit selects the user setting, whether a previous point and a new point belong to a predetermined range in which local time counted at the previous point is equal to local time counted at the new point, and a daylight saving time implementation information switching unit which acquires local time on the basis of the daylight saving time implementation rule when the previous point and the new point do not belong to the predetermined range.