Touch Panel Acoustic Signal Generation with Acceleration Data Selection

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Solution Overview

Problem

Conventional electronic acoustic signal generating devices fail to accurately reflect the force of a user's touching action in sound volume due to timing discrepancies between touch panel and acceleration sensor detections, leading to inaccurate sound generation.

Innovation Solution

An electronic acoustic signal generating device with a touch panel, acceleration sensor, storage section, and processing circuit that saves and selects acceleration data to determine signal characteristics, ensuring accurate reflection of the touching action's force in sound generation, even with timing differences between detection events.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If acceleration sensor is used to detect touching force, then sound volume can be controlled by touching force, but timing discrepancy between touch panel and acceleration sensor causes inaccurate sound generation

Engineering Contradiction:

Improvetouching force detectionVSAvoidtouching force measurement accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The system performs preliminary action by storing acceleration data at predetermined regular intervals before the touching action is detected. When a touch is detected, the system retrieves previously stored acceleration data that corresponds to the touching force, eliminating timing discrepancies. This allows the acceleration sensor to be used for force detection while ensuring accurate correspondence between touch and sound generation.

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If acceleration sensor output is used directly for sound volume control, then sound generation is simple, but timing mismatch prevents accurate reflection of touching action

Engineering Contradiction:

Improvesound generation systemVSAvoidsound generation accuracy

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The system stores acceleration data at predetermined regular intervals in advance before touching action occurs. This preliminary storage of data allows the system to retrieve the correct acceleration value corresponding to the touch moment, ensuring reliable sound generation without increasing device complexity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system introduces an intermediary mechanism (data storage and selection circuit) that mediates between the acceleration sensor output and the sound generation. This intermediary stores acceleration data and selects the appropriate value based on timing, ensuring accurate correspondence between touching action and sound volume without complicating the overall system architecture.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If touch panel detects touching action, then user interaction is detected, but force information is not captured

Engineering Contradiction:

Improvetouch detectionVSAvoidtouching force information

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The system merges the functions of the touch panel (which detects touching action) and the acceleration sensor (which detects touching force). By combining data from both sensors through the storage and selection mechanism, the system captures both the fact that a touch occurred and the force with which it occurred, eliminating information loss.

Inventive Principle:

Principle #5Merging (Combining)

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

The device effectively decides acoustic signal characteristics that closely match the user's touching action, ensuring accurate sound volume and quality by selecting appropriate acceleration data based on predetermined conditions, thus improving the accuracy of sound generation.

Implementation Method 1

an acceleration sensor that detects an acceleration when a touching action is performed on the manipulator on the touch panel

Methodology Applied

Scientific EffectAcceleration detection: Accelerometer

Data Source

PatentUS8978672B2Electronic acoustic signal generating device and electronic acoustic signal generating method

Publication Date: 2015.03.17 YAMAHA CORP

AI summary

A device includes a touch panel, a display circuit that displays a manipulator on the touch panel, an acceleration sensor that detects an acceleration when a touching action is performed on the manipulator on the touch panel, a storage section that acquires acceleration data that shows the acceleration detected by the acceleration sensor, and saves n number of items of the acceleration data in sequence of newest first; a processing circuit that saves k (wherein k<n) number of the acceleration data items in the storage section, and then selects at least one acceleration data item that matches predetermined conditions from among the n number of acceleration data items that include the k number of acceleration data items; and a sound effect/source circuit that, based on the acceleration data selected by the processing circuit, decides signal characteristics of an acoustic signal that should be generated.