Frequency Converter Symbol Editor Using Segmented Lists
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Solution Overview
Problem
Frequency converters have limited control panels with small displays and few keys, making it difficult to efficiently input and edit symbol strings, especially when a large number of symbols are required, leading to cumbersome scrolling through long lists.
Innovation Solution
Grouping potential input symbols into at least two symbol lists, allowing users to scroll and select from a shorter current list, with a four-directional control device to switch between lists and select symbols, reducing the complexity and length of the editing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a scrollable symbol list is provided for inputting symbols, then the interface is intuitive and easy to use, but the symbol list becomes very long and it is tiresome and time-consuming to scroll through to select desired symbols
Solution Approach 1:
The patent divides the complete symbol set into multiple categorized symbol lists (e.g., alphanumeric symbols, special symbols, unit symbols). Instead of presenting one long scrollable list, the interface segments symbols into manageable categories, allowing users to select from shorter, organized lists rather than scrolling through all symbols sequentially.
Solution Approach 2:
The patent introduces a hierarchical dimension to symbol selection. First, users select a symbol list category (first level), then select from symbols within that category (second level). This two-dimensional approach replaces the single-dimensional long-scrolling list, organizing symbols by type before selection and reducing the scrolling distance in each dimension.
2Device complexity
If the control panel is kept small and simple with limited keys, then reliability and compactness are improved, but the capability to efficiently input and edit symbol strings is reduced
Solution Approach 1:
The patent makes the four-directional control device universal by using it for multiple functions: navigating symbol lists, selecting symbols, editing symbol strings, and confirming selections. This multi-functional approach allows efficient symbol string input using only the simple four-directional controls without requiring additional dedicated keys for text editing operations.
Solution Approach 2:
The system provides self-service text editing capabilities where the four-directional control device handles all text input and editing operations automatically. The interface adapts to the user's directional inputs to navigate, select, and insert symbols without requiring complex manual intervention or additional hardware controls.
Data Source
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AI summary
A frequency converter has a symbol string editor in which the potential input symbols are grouped into at least two symbol lists 4. One of the lists is treated as a current symbol list 4, which can be scrolled and from which the symbols can be selected as the user input. In addition, user is allowed to control change of the current symbol list 4 such that the symbols in all of the symbol lists 4 are available for selection. The invention allows embodiments, in which the scrollable lists are significantly shorter than a single list of potential symbols would be. This makes entering symbol strings faster.