Soft Keyboard Gesture Recognition for Case Switching
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Solution Overview
Problem
Operating a soft keyboard on portable computing devices can be challenging due to the need for additional finger or thumb movements to manage the SHIFT key for capital letters, leading to slowed input and error-prone situations.
Innovation Solution
A computing device detects single and double touch actions on keys to display initial and alternate characters respectively, omitting the need for a SHIFT key by using gestures to toggle case, and performs specific backspace processing based on the type of character displayed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a SHIFT key is included in the soft keyboard to enable uppercase character input, then the keyboard can provide complete character input functionality, but the number of keys increases and the operation becomes more complex
Solution Approach 1:
The patent removes the SHIFT key from the keyboard layout entirely. Instead of having a dedicated key for case switching, the system uses gesture-based approaches (single tap vs. double tap) to select between lowercase and uppercase characters, thereby simplifying the physical keyboard structure while maintaining full functionality.
Solution Approach 2:
Each key on the keyboard is designed to perform multiple functions based on the tap gesture: a single tap produces a lowercase character while a double tap produces an uppercase character. This multi-functionality eliminates the need for separate SHIFT keys, as the same key handles both case requirements through different interaction modes.
2Adaptability or versatility
If a SHIFT key is added to the soft keyboard, then uppercase character input is enabled, but the input speed decreases due to additional finger movements
Solution Approach 1:
The patent combines the case switching function with the character selection function into a single key interaction. By merging these two operations, the user no longer needs to perform separate actions for case switching and character input, thereby maintaining input speed while enabling uppercase character capability.
Solution Approach 2:
The system uses periodic tap actions (single tap for lowercase, double tap for uppercase) as a rhythmic interface pattern. This periodic interaction model allows users to switch between cases efficiently without breaking the flow of typing, as the double-tap sequence becomes a natural extension of the single-tap rhythm.
3Adaptability or versatility
If a SHIFT key is included for capital mode switching, then case input is supported, but the number of operations increases leading to more errors
Solution Approach 1:
By extracting the SHIFT key from the keyboard, the patent eliminates the source of case switching errors. The gesture-based system (single tap vs. double tap) reduces the operational steps required, thereby minimizing the opportunities for user error and improving input reliability.
Solution Approach 2:
The system provides immediate visual feedback when a key is tapped, displaying the selected character (lowercase or uppercase) on the screen. This feedback mechanism confirms to the user that the correct character has been selected, reducing errors and increasing confidence in the input process.
Data Source
AI summary
Input from a keyboard of a computing device may include displaying a character associated with a key depending on whether the user single-tapped or double-tapped the key. A single touch on the key may cause the computing device to display an initial character that is associated with the key. A double touch on the key may cause the computing device to display an alternate character that is associated with the key.