Half-Wave Rectified Vibration Actuator for Sound-Coupled Haptics
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Solution Overview
Problem
Existing sensory vibration generation apparatuses require complex configurations to generate suitable vibrations corresponding to sound, which is not efficiently addressed by existing technologies.
Innovation Solution
A sensory vibration generation apparatus utilizing an electromagnetic actuator that drives a movable member in one direction using an alternating current signal after half-wave rectification, supported elastically to vibrate and transmit vibrations to a user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an electromagnetic actuator driven in one direction is used to generate vibration, then the configuration becomes simpler, but the ability to generate suitable vibration corresponding to sound is insufficient
Solution Approach 1:
The patent applies periodic action by using half-wave rectification to convert the alternating current signal into a unidirectional periodic driving signal. This allows the electromagnetic actuator to receive continuous periodic excitation in one direction, enabling it to generate vibrations that correspond to sound waves while maintaining a simple configuration. The periodic nature of the rectified signal ensures continuous vibration generation without requiring complex bidirectional control mechanisms.
2Reliability
If a complex configuration is used to generate suitable vibration, then the vibration generation capability is improved, but the device complexity increases
Solution Approach 1:
The patent extracts only the necessary functional component for vibration generation by using a simple electromagnetic actuator driven in one direction. Instead of implementing a complex bidirectional actuator system, the invention extracts the essential vibration-generating function and achieves it through unidirectional actuation combined with half-wave rectification of the driving signal, thereby simplifying the overall configuration while maintaining vibration generation capability.
3Ease of operation
If half-wave rectification is applied to the alternating current signal, then the electromagnetic actuator can be driven in one direction, but the signal processing complexity increases
Solution Approach 1:
The patent replaces complex mechanical bidirectional actuation mechanisms with an electrical signal processing approach. By using half-wave rectification to convert the alternating current signal into a unidirectional driving signal, the system achieves simple unidirectional actuator driving without requiring complex mechanical control systems, switches, or mechanical reversers.
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
Enables the user to feel suitable vibrations corresponding to sound with a simpler configuration, reducing complexity and cost while maintaining effective vibration transmission.
Implementation Method 1
an electromagnetic actuator configured to vibrate a movable member by driving the movable member in one direction of a vibration direction of the movable member with an input driving signal
Implementation Method 2
the movable member being supported to elastically vibrate with respect to a fixing body
Implementation Method 3
a rectification section configured to acquire the driving signal by performing half-wave rectification on the alternating current signal
Data Source
AI summary
This bodily vibration generation device can be mounted to a bodily sensation presentation apparatus and generates, with a simple configuration, suitable vibration corresponding to a sound so that a user bodily senses the vibration. This device has: an electromagnetic actuator that causes, by an inputted drive signal, a movable body being supported so as to be elastically vibratable with respect to a fixed body, to vibrate by driving same in one direction of the vibration directions thereof; an AC signal input unit for inputting an AC signal; and a rectification unit that performs half-wave rectification of the AC signal and outputs the AC signal to the electromagnetic actuator as the drive signal.