Tactile Sensation Presentation Device Trajectory Prediction

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Solution Overview

Problem

Quick tracing on touch panel devices results in frequent vibration, leading to user annoyance due to continuous tactile sensation presentation.

Innovation Solution

A tactile sensation presentation device and method that predicts the next selected image based on the trajectory of a tracing operation and only presents tactile sensation when the trajectory reaches the next selected image, rather than continuously across boundary lines between images.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If vibration is presented at every boundary line crossing during tracing operation, then tactile feedback is provided continuously, but user annoyance increases due to frequent vibration during quick tracing

Engineering Contradiction:

Improvetactile feedback qualityVSAvoiduser annoyance

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The control unit predicts the next selected image before the user actually selects it, based on the current trajectory of the tracing operation. This preliminary prediction allows the system to prepare tactile feedback in advance, presenting vibration only when the prediction indicates the user will actually select the predicted image, rather than vibrating at every boundary line crossing.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses trajectory-based prediction to create intelligent feedback control. By continuously monitoring the tracing trajectory and predicting the next selected image, the system adjusts tactile feedback delivery to match actual user intent, providing feedback only when predicted selection is likely, thereby reducing unnecessary vibration and user annoyance.

Inventive Principle:

Principle #23Feedback

2Duration of action of moving object

If tactile sensation is presented at short intervals during quick tracing, then continuous feedback is provided, but user experience deteriorates due to annoyance

Engineering Contradiction:

Improvefeedback continuityVSAvoiduser annoyance

Core Design Contradiction:

Duration of action of moving objectVSObject-affected harmful factors

Solution Approach 1:

Instead of continuous or frequent periodic vibration at every boundary line, the system implements intelligent periodic action by predicting the next selected image and providing tactile feedback only at predicted selection points. This transforms the vibration pattern from frequent regular intervals to selective intervals based on predicted user behavior, maintaining feedback continuity where needed while eliminating annoying frequent vibration.

Inventive Principle:

Principle #19Periodic action

3Loss of information

If vibration frequency is increased to provide continuous tactile feedback, then feedback completeness is improved, but user annoyance increases during rapid tracing operations

Engineering Contradiction:

Improvefeedback completenessVSAvoiduser annoyance

Core Design Contradiction:

Loss of informationVSObject-affected harmful factors

Solution Approach 1:

The system extracts and removes unnecessary tactile feedback vibrations from the continuous feedback stream. By predicting the next selected image and comparing actual boundary line crossings with predicted selection points, the system extracts only the meaningful feedback moments (when prediction matches actual selection) and removes unnecessary vibrations (when boundary lines are crossed but no selection is predicted), thereby reducing feedback completeness loss while eliminating user annoyance.

Inventive Principle:

Principle #2Taking out (Extraction)

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

This approach suppresses annoyance by reducing the frequency of tactile sensation presentation, improving user experience, especially during rapid tracing operations, by providing feedback only when the user interacts with the predicted next image.

Implementation Method 1

a vibration presentation unit that presents tactile sensation by vibrating the operation surface according to the touch operation

Methodology Applied

Scientific EffectMechanical vibration: Vibration

Data Source

PatentUS11327569B2Tactile sensation presentation device and tactile sensation presentation method

Publication Date: 2022.05.10 KK TOKAI RIKA DENKI SEISAKUSHO

AI summary

A tactile sensation presentation device includes a display unit that displays plural images on a display screen, an operating portion including an operation surface on which a touch operation is performed to select one of the plural images displayed on the display unit, a vibration presentation unit that presents tactile sensation by vibrating the operation surface according to the touch operation, and a control unit that extracts at least one candidate image, which has a probability of being selected next after a selected image selected on the operation surface, from the plural images displayed on the display screen, predicts a next selected image to be selected next from the candidate image(s) based on a trajectory, on the display screen, of a tracing operation as the touch operation performed on the operation surface, and presents tactile sensation by the vibration presentation unit when reaching the next selected image.