Adaptive Virtual Keyboard Layout for Natural Thumb Typing
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Solution Overview
Problem
Existing virtual keyboards on handheld devices are ill-suited for thumb operation due to their linear key arrangements, which require unnatural thumb articulation and do not account for individual user differences in hand and thumb size.
Innovation Solution
The virtual keyboard is arranged in tiered arcs that accommodate the natural motion of the thumb, with customizable key placements and adaptive sensing to compensate for off-center or larger thumb contact, and includes methods for calibrating the keyboard to the user's preferences and thumb size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If keys are arranged in a rectangular matrix or standard QWERTY format, then the keyboard layout is simple and standardized, but the linear row arrangement requires unnatural thumb articulation and is ill-suited for thumb operation
Solution Approach 1:
The patent applies curvature by arranging keys in arc-shaped rows instead of straight lines. The keys are positioned along circular arcs that radiate from a common center point, creating a curved keyboard layout that naturally accommodates the rotational motion of the thumb. This curved arrangement allows the thumb to move along the arc without requiring unnatural articulation at the thumb joints, directly resolving the contradiction between ease of thumb operation and layout simplicity.
2Adaptability or versatility
If the keyboard is designed with fixed key arrangements, then the design is simple to implement, but it cannot account for individual user differences in hand and thumb size
Solution Approach 1:
The patent implements dynamics by making the keyboard layout adjustable and reconfigurable based on user characteristics. The system allows customization of key positions, row spacing, and arc radii to match individual user thumb sizes and preferences. This dynamic adaptation capability enables the keyboard to transform from a fixed layout to a personalized configuration, resolving the contradiction between adaptability to individual users and implementation simplicity.
Solution Approach 2:
The patent applies parameter changes by allowing modification of key layout parameters such as arc radius, key spacing, and row curvature to accommodate different user anatomies. The system can adjust these parameters based on user input or calibration procedures, enabling the same keyboard hardware to be optimized for users with varying thumb sizes and hand proportions, thus achieving versatility without requiring multiple physical keyboard designs.
3Ease of operation
If the keyboard uses standard linear rows, then the layout is easy to manufacture and display, but it requires extensive proprioceptive development for users to become accustomed to it
Solution Approach 1:
The curved arc arrangement of keys follows the natural rotational path of the thumb, allowing users to type immediately with minimal proprioceptive development. The arc-shaped rows enable the thumb to move naturally along the curve without requiring adaptation to linear row transitions, significantly reducing the learning curve and time needed to develop typing proficiency.
Data Source
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AI summary
In various embodiments, the size, shape and arrangement of keys on a virtual keyboard may be determined based on touchscreen contacts made by the user. Further, the actual contact patch made by the user may be analysed to interpret which point of contact was intended, and other factors such as spelling and context may also be considered. These factors may be determined based on a calibration session and/or on continuing inputs during operation of the keyboard, and applied to future operational interpretations of the touchscreen contacts.