Touchscreen Handwriting Display Prediction Controller
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Solution Overview
Problem
Handwriting input on touchscreen displays in portable electronic devices experiences delays, leading to user disconcertment and increased calculation costs due to prediction errors, which affect the writability and responsiveness of the input process.
Innovation Solution
An electronic apparatus with a display controller that displays a predicted line segment alongside the actual line segment for a predetermined duration, using a combination of detection signals and prediction algorithms to reduce delay and user disconcertment, while minimizing calculation costs by adjusting the display period and color of the predicted line segment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If prediction algorithm is used to reduce display delay, then response performance is improved, but calculation cost increases
Solution Approach 1:
The system performs prediction in advance to display the predicted line segment before the actual handwriting data is fully processed, thereby reducing the perceived display delay. The prediction result is displayed temporarily and then replaced or corrected when actual data becomes available, achieving proactive response without continuous heavy calculation.
2Reliability
If correction process is implemented when prediction is wrong, then user disconcertment is reduced, but calculation cost increases
Solution Approach 1:
The system implements a feedback mechanism where the predicted line segment is displayed temporarily, and when actual handwriting data becomes available, the system compares and corrects the prediction if necessary. This feedback loop ensures accuracy while avoiding continuous correction calculations by only performing corrections when needed.
3Ease of operation
If smoothing is applied to make wrong prediction inconspicuous, then user experience is improved, but drawn line segment deviates from actual handwriting position
Solution Approach 1:
The system applies different quality levels to different parts of the displayed line segment. The predicted portion is displayed with lower visual prominence (e.g., different color or transparency) to indicate its predictive nature, while the actual handwriting data is displayed with high accuracy. This local differentiation maintains user experience by making predictions inconspicuous while preserving position accuracy for the actual handwriting.
Data Source
AI summary
According to one embodiment, an electronic apparatus includes a touchscreen display and a display controller. The display controller is configured to display, on the touchscreen display, a locus of first contact input detected on the touchscreen display. The display controller is configured to draw a first line corresponding to the locus of the first contact input, and to draw a second line, based on a prediction based on a first position of the first contact input. The display controller is configured to display the second line in addition to the first line on the touchscreen display for a first duration of time.