Electronic Timepiece DST Rule Matching via Standard Wave Reception
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Solution Overview
Problem
Electronic timepieces that independently determine daylight saving time (DST) periods based on standard waves may fail to provide accurate time information due to mismatched DST application rules, leading to inappropriate time display.
Innovation Solution
An electronic timepiece that stores local time information, including DST application rules and standard-wave transmitting station information, and uses a processor to calibrate time based on received standard waves, ensuring that DST application is applied only if the specific-region DST application rule information matches the standard-wave transmitting station information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the electronic timepiece independently determines DST period based on standard waves, then the timepiece can operate autonomously without external DST information, but the time display may be inaccurate due to mismatched DST application rules
Solution Approach 1:
The patent applies local quality by storing multiple DST application rules corresponding to different standard-wave transmitting stations in the storage unit. The processor selectively applies the appropriate DST rule based on which standard wave is actually received, ensuring local accuracy for each region rather than using a single universal DST rule
Solution Approach 2:
The patent implements feedback by having the processor determine whether a standard wave is actually received and then selectively apply or not apply DST based on this feedback. The system continuously monitors standard wave reception status and adjusts DST application accordingly, creating a closed-loop control mechanism that ensures time display accuracy
2Adaptability or versatility
If the electronic timepiece stores multiple DST application rules for different regions, then the timepiece can provide accurate time for multiple regions, but the storage requirements and data management complexity increase
Solution Approach 1:
The patent achieves universality by designing the storage unit to hold multiple DST application rules that can serve different standard-wave transmitting stations. The same storage structure and processor logic handle all regional DST rules uniformly, allowing the timepiece to function accurately across multiple regions without requiring region-specific hardware or complex separate management systems
Data Source
AI summary
An electronic timepiece includes a storage that stores specific-region DST application rule information and local time information that includes, in association with each other, DST application rules for each region and standard-wave transmitting station information indicating each station transmitting standard waves receivable in the region; a processor that controls clock time to be kept by a clock circuit and displays time to be displayed on a display; and a standard wave receiver that receives standard waves and obtains time information. The processor calibrates the clock time based on the time information indicated by the standard waves received by the standard wave receiver, and controls the display time based on whether the specific-region DST application rule information and the DST application rule information associated with the standard-wave transmitting station information indicating a station transmitting the received standard waves satisfy a predetermined condition.