Touch Display Character Area Expansion for Input Accuracy
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Solution Overview
Problem
Portable electronic devices with touch-sensitive displays face challenges in efficiently managing input on small screens due to limited space and the need for improved user interaction, particularly in reducing errors and enhancing typing speed.
Innovation Solution
The method involves detecting touches on a touch-sensitive display, adding characters to a string, identifying matching objects from stored data, increasing the size of active areas for predicted next characters, and reducing their size over time without further input, to facilitate accurate and efficient character entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the size of the touch-sensitive display is decreased to improve portability, then the device becomes more portable, but the area available for user input and output is reduced
Solution Approach 1:
The system performs preliminary action by predicting and highlighting likely next characters before the user actually needs to input them. This allows users to anticipate upcoming input requirements, reducing the effective cognitive load and time needed for character entry on the limited display area.
Solution Approach 2:
The system implements feedback by dynamically adjusting the visual size of character areas based on prediction algorithms. Characters that are likely to be selected next are displayed with larger areas, providing immediate visual feedback to guide user input and reduce errors on the small touchscreen.
2Measurement precision
If the area of each character on the display is increased to improve input accuracy, then typing accuracy improves, but the number of characters that can be displayed simultaneously is reduced
Solution Approach 1:
The system applies local quality by making only the predicted next characters have enlarged display areas, while other characters maintain their standard size. This selective enhancement provides high input accuracy for the most relevant characters without significantly reducing the overall number of visible characters on the display.
Solution Approach 2:
The system uses partial action by enlarging only the specific character areas that are predicted to be selected next, rather than uniformly enlarging all character areas. This partial enhancement achieves the accuracy benefit where needed while preserving display space for other characters.
3Reliability
If the system highlights multiple possible next characters to reduce input errors, then typing accuracy improves, but the complexity of the display and user interface increases
Solution Approach 1:
The system uses local quality to differentiate only the predicted next characters through area enlargement, keeping the rest of the interface simple and uniform. This localized modification reduces input errors without significantly increasing overall interface complexity.
Solution Approach 2:
The system employs visual changes (area enlargement) to highlight important characters, similar to how color changes are used in other interfaces to draw attention. This visual differentiation improves reliability by making the correct characters more noticeable without requiring complex interface elements.
Data Source
AI summary
A method of controlling an electronic device that has a touch-sensitive display includes detecting a touch at an area associated with a character displayed on the touch-sensitive display, adding the character to a character string, identifying, from stored data, objects that at least partially match the character string, determining a next character of ones of the objects identified to yield a set of next characters, increasing a size of an area associated with each character of the set of next characters, and reducing the size of the area associated with each character of the set of next characters with time absent detection of a further touch.