Input Shortcuts for Mobile Device Symbol Entry
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Solution Overview
Problem
Handheld mobile communications devices face difficulties in efficiently inputting special symbol characters due to their reduced keyboard size, making it cumbersome for users to enter symbols like @ or . when only one hand is free.
Innovation Solution
A method and device implementation that allows users to input electronic addresses by detecting repetitive successive inputs of a delimiter, such as a space bar, to select and add non-text symbol characters from a predefined set, facilitating easier entry of symbol characters in address fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional keyboard is used on a handheld mobile communications device, then the device can receive user input, but the keyboard size must be reduced to fit the small device, making it cumbersome to input special symbol characters
Solution Approach 1:
The keyboard is segmented into multiple layers or levels. The first level contains alphanumeric characters, while the second level contains special symbol characters. Users can switch between levels using a SHIFT key or similar mechanism, allowing access to special symbols without requiring a full-sized keyboard layout.
Solution Approach 2:
Keys on the keyboard are designed to serve multiple functions. Each key can represent different characters or symbols depending on the active layer or mode. This multi-functionality allows a reduced-size keyboard to provide access to both alphanumeric and special symbol characters using the same physical key positions.
2Adaptability or versatility
If the keyboard keys are made smaller to accommodate more features in limited space, then more keys can be fitted on the device, but inputting special symbols becomes nearly impossible with one hand
Solution Approach 1:
Multiple character sets (alphanumeric and special symbols) are merged into a single keyboard structure through layering. The SHIFT key acts as a toggle that combines access to both character sets, allowing users to input special symbols with the same thumb used for alphanumeric input, maintaining one-handed operability.
Solution Approach 2:
The keyboard design adds a temporal or sequential dimension to character selection. Instead of requiring lateral space for separate symbol keys, the system uses time-based input sequences (pressing SHIFT then the symbol key) to access special characters, effectively utilizing the time dimension rather than spatial dimension.
3Adaptability or versatility
If additional keys or features are added to the keyboard, then more functionality is available, but there is limited physical space on the mobile device
Solution Approach 1:
The keyboard implements dynamic layer switching where the active character set changes based on user input (e.g., pressing SHIFT). This dynamic behavior allows the same physical keys to represent different characters at different times, effectively doubling or tripling the functionality without adding physical keys.
Solution Approach 2:
Multiple character sets are nested within the same physical key structure. Each key contains multiple character representations, and the active representation is determined by the current keyboard state or layer. This nesting allows comprehensive character coverage within a compact footprint.
Data Source
AI summary
A method of inputting an electronic address into a text field on a communications device is disclosed, as well as a device and controller for implementing the method. The method includes: receiving, through a user input interface of the device, an input corresponding to a predetermined delimiter; selecting a non-text symbol character from a set of non-text symbol characters in dependence on a number of times the input corresponding to the predetermined delimiter has been repetitively input without any intervening inputs; and adding the selected non-text symbol character to the text field of the communications device when an input other than that corresponding to the predetermined delimiter is received.