Virtual Keyboard Touch Correction for One-Handed Typing Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touchscreen interfaces on mobile devices, such as smartphones, face challenges in accurately registering user inputs due to difficulty in reaching certain keys, particularly when held in one hand, leading to increased typing errors.
Innovation Solution
The touchscreen is divided into an 'easy zone' and a 'difficult zone', with the position of touches computed and corrected based on their zone assignment, using accelerometers to determine hand orientation and learning user habits for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If capacitive touch technology is used to enable multi-touch functionality, then the number of simultaneous touches is improved, but false touches caused by environmental factors (rain, snow, dust) deteriorates reliability
Solution Approach 1:
The patent introduces an intermediary layer (transparent film or coating) between the capacitive touch sensor and the external environment. This intermediary layer selectively filters environmental factors like rain, snow, and dust while allowing legitimate touch inputs to pass through to the sensor, thereby resolving the contradiction between multi-touch capability and reliability.
Solution Approach 2:
The patent converts harmful environmental factors (rain, snow, dust) into beneficial signals by detecting their capacitive presence and using them to trigger protective actions or ignore them as false touches. For example, continuous contact patterns from rain can be distinguished from intentional taps, transforming the harmful environmental interference into a manageable signal characteristic.
2Ease of operation
If the touchscreen is made more sensitive to detect light touches, then ease of operation is improved, but susceptibility to false touches from environmental factors deteriorates
Solution Approach 1:
The patent implements dynamic threshold adjustment where the touch detection sensitivity is not fixed but adapts based on contextual factors. The system dynamically modifies detection thresholds based on environmental conditions, touch duration, pressure patterns, and sequence of events, allowing high sensitivity for legitimate touches while filtering out false triggers from environmental factors.
Solution Approach 2:
The patent employs feedback mechanisms where the system continuously monitors touch characteristics and adjusts its interpretation accordingly. Feedback from touch duration, pressure variation, and contact pattern analysis allows the system to distinguish between intentional user inputs and environmental interference, resolving the contradiction between sensitivity and reliability.
3Device complexity
If traditional touch sensors are used, then device complexity is low, but inability to detect multiple simultaneous touches deteriorates functionality
Solution Approach 1:
The patent segments the touch detection function into multiple independent detection zones or sensors that can simultaneously detect touches at different locations. By dividing the touchscreen surface into multiple sensing regions, the system achieves multi-touch capability without requiring a completely new sensor architecture, thus managing the complexity-functionality trade-off.
Solution Approach 2:
The patent makes the touch sensor system multi-functional by enabling it to detect both single touches and multiple simultaneous touches using the same hardware infrastructure. The sensor system is designed to handle various touch scenarios (single tap, double tap, multi-finger gestures) through software algorithms, achieving versatility without proportionally increasing hardware complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces typing errors by accurately associating touches with intended keys without altering the virtual keyboard layout, enhancing user input reliability.
Implementation Method 1
capacitive touch sensor
Data Source
Figure 1~2
Figure 3
AI summary
The present invention relates to a mobile device (100) and a method for improving the reliability of user's touches on a touchscreen. It is based on the virtual subdivision of a keyboard zone in an easy zone (105), where the user can easily play the keys, and a difficult zone (104), where the user has some difficulty to correctly touch the keys. The touches in the easy zone (105) are not corrected, while the touches in the difficult zone (104) may be corrected according to a number of criteria. In any case the layout of the virtual keyboard does not change.