Touch Screen Input Processing for Unintended Drawing Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch screen systems struggle to accurately distinguish between intended and unintended drawing operations, leading to unwanted drawing when the user's intention is not followed, often due to sudden changes in pen touch position and pressure.
Innovation Solution
An information processing system that acquires touch position and pressure information, calculates change amounts, and determines whether the operation is suited for drawing by analyzing simultaneous sudden drops in pressure and direction changes, switching between drawing and no-drawing modes accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If drawing operation is executed based on touch position and pressure information, then drawing functionality is enabled, but unintended drawing occurs when user intention is not followed
Solution Approach 1:
The system performs preliminary analysis of pressure change amounts and direction change amounts before executing the drawing operation. By calculating these change amounts in advance and comparing them against threshold values, the system determines whether the touch operation reflects genuine user intention for drawing, thereby preventing unintended drawing while maintaining drawing functionality.
2Reliability
If pressure threshold is used to prevent unintended drawing, then false drawing is reduced, but legitimate drawing with light pressure is blocked
Solution Approach 1:
The system changes from using a single pressure threshold parameter to using multiple parameters: pressure change amount and direction change amount. By monitoring the rate of pressure change and the directional movement of the touch position, the system can distinguish between unintended contact (sudden pressure drop with minimal movement) and legitimate light pressure drawing (gradual pressure change with significant directional movement), thus preventing false drawing while allowing legitimate operations.
3Device complexity
If simple touch detection is used, then system complexity is low, but distinction between intended and unintended drawing is inaccurate
Solution Approach 1:
The system introduces intermediary calculations (pressure change amount and direction change amount) that mediate between the raw touch detection data and the final drawing execution decision. These intermediary parameters act as additional sensors that provide more nuanced information about the touch operation characteristics, enabling more accurate distinction between intended and unintended drawing without requiring complex hardware modifications.
Data Source
AI summary
Provided are information processing system and information processing method which make it possible to avoid execution of drawing by a pen touching operation which does not follow a user's intention accurately.