Electronic Timepiece Local Time Accuracy via Segmented Storage
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Solution Overview
Problem
Existing electronic timepieces face challenges in continuously and accurately displaying local time due to frequent changes in time zones and daylight-saving time settings, especially in regions with limited data transmission capabilities.
Innovation Solution
An electronic timepiece equipped with a storage unit and processor that associates local time information with geographical positions, allowing for automatic updates and manual corrections using satellite radio waves to ensure accurate timekeeping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If map data with time zone and daylight-saving time information is stored and updated frequently, then local time accuracy is improved, but data storage requirements and update complexity increase
Solution Approach 1:
The patent divides the world map data into multiple blocks and stores only the time zone and daylight-saving time information for the current position's block in the time zone storage unit, rather than storing complete global map data. This segmentation reduces data storage requirements while maintaining local time accuracy.
Solution Approach 2:
The patent stores time zone information specifically for the block containing the current position in the time zone storage unit, rather than uniformly storing all possible time zone data. This local quality approach ensures accurate local time display while minimizing data storage requirements.
2Measurement precision
If complete map data with time zone and daylight-saving time information is stored, then local time accuracy is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the necessary time zone and daylight-saving time information from the complete map data, storing only the relevant block's data in the time zone storage unit. This extraction reduces device complexity by eliminating the need to manage and process unnecessary global map data.
Solution Approach 2:
The patent pre-divides the world map into blocks and pre-identifies which block contains the current position, so that only the relevant time zone data needs to be stored and managed. This preliminary action simplifies data management complexity while ensuring accurate local time display.
3Measurement precision
If time zone and daylight-saving time information is updated frequently, then local time accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The patent enables the electronic timepiece to automatically acquire and update time zone and daylight-saving time information for the current position without requiring user intervention. The system self-updates the time zone storage unit with new information, improving local time accuracy while maintaining ease of operation.
Data Source
AI summary
An electronic timepiece includes a storage unit and a processor. The storage unit associates and stores local time information with a corresponding geographical position. The local time information corresponds to each of a plurality of predetermined geographical positions. The processor acquires local time information corresponding to a geographical position selected from the plurality of geographical positions, as update information of a predetermined region including the selected geographical position. When update information corresponding to a target position for setting local time is acquired, the processor sets the local time by referring to the acquired update information. When the update information corresponding to a target position for setting local time is not acquired, the processor sets the local time by referring to the local time information.