JP2002344565A - Method of driving vibration actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of improving the sound quality for simultaneous use of an incoming transmitting function with vibration and an incoming transmitting function with voice in transferring the incoming through a vibration actuator usable for portable telephones, etc. SOLUTION: A controller of a vibration actuator previously records the frequencies and the quantities of distortions caused when a vibration signal and a voice signal are superposed one on the other and inputted to the controller. Based on the data the controller has recorded, distortions are removed from the superposed signals to output vibration signals and voice signals, thus improving the quality of reproduced sounds.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving a vibration actuator, which can be used for a portable communication device such as a portable telephone and can simultaneously output a voice signal and a vibration signal.

[0002]

2. Description of the Related Art In recent years, the spread of mobile phones has been remarkable. In consideration of convenience, it is desired that such a device be as small and lightweight as possible and consume less power. One of the components that responds to the demand is a multifunctional vibration actuator.

[0003] In a conventional portable telephone, there is a method of transmitting an incoming call irrespective of a ringing tone by rotating a motor inside the portable telephone and transmitting the incoming call by mechanical vibration. However, when a motor is used, there has been a problem that the miniaturization of the housing of the mobile phone is hindered, and it is difficult to suppress an increase in power consumption, so that the charging interval is shortened.

A multi-function vibration actuator has been developed as a countermeasure for this, and has a speaker provided with a vibration function, that is, an incoming call transmission function by mechanical vibration, and is becoming mainstream in mobile phones and the like. .

[0005] Using such a vibration actuator,
If you try to play the audio signal and the vibration signal at the same time, you need to input both signals superimposed,
The superimposed signals hinder each other in the mode operation, and as a result, although they can be driven simultaneously, an output signal with a large amount of distortion is generated.

When using a mobile phone, it is difficult to hear a ring tone in a crowded place or the like, and it is essential to use a function of transmitting a call by vibration. Therefore, the above-mentioned problem has been a factor that significantly impairs the convenience of the mobile phone.

[0007]

SUMMARY OF THE INVENTION Accordingly, a technical problem of the present invention is to provide a method for transmitting an incoming call by a vibration actuator used in a cellular phone or the like, and simultaneously using an incoming call transmitting function by vibration and an incoming call transmission function by voice. To improve sound quality.

[0008]

SUMMARY OF THE INVENTION The present invention has been made as a result of studying a method for correcting an audio output signal in order to solve the above-mentioned problems.

That is, according to the present invention, the frequency and amount of distortion generated when a vibration signal and an audio signal are superimposed and input to the vibration actuator are input to a controller of the vibration actuator capable of outputting a vibration signal and an audio signal. A driving method of a vibration actuator, characterized in that a vibration signal and / or an audio signal are output after recording and removing a distortion from a superimposed signal based on data recorded in a controller.

[0010]

According to the present invention, even if an audio signal and a vibration signal are output simultaneously, the distortion of the signal is eliminated, so that the sound reproduced from the speaker can be made clear and of high sound quality. .

[0011]

Embodiments of the present invention will be described below.

FIG. 1 is a block diagram showing a configuration of an open-loop distortion correction method according to an embodiment of the present invention. As shown in this figure, this example includes a vibration actuator 101, an amplifier 102 for driving the vibration actuator, an IC 103 constituting a controller for performing waveform correction, and an IC 10 for generating a vibration signal.
4. It is composed of an IC 105 for generating an audio signal.

With such a configuration, when the audio signal and the vibration signal are superimposed and sent to the IC 103, the input signal is corrected based on the data recorded in the IC 103 in advance, and amplified by the amplifier 102. Drive the vibration actuator 101.

FIG. 2 shows an example of a waveform obtained by correcting a superimposed signal and separating the signal into a vibration signal and an audio signal. By correcting the audio signal in this way, the ringtone can be reproduced with clear sound quality while using the vibration function.

In this example, either a vibration signal or an audio signal can be output by switching a switch or the like.

[0016]

As described above, according to the present invention, when a vibration actuator capable of outputting a vibration signal and an audio signal is used, deterioration of sound quality is prevented even if the vibration signal and the audio signal are output simultaneously. It is possible to do. Thereby, the convenience of the portable communication device such as a mobile phone can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a distortion correction method according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a waveform obtained by correcting a superimposed signal and separating the signal into a vibration signal and an audio signal according to the embodiment of the present invention.

[Explanation of symbols]

101 Vibration actuator 102 Amplifier (for driving the vibration actuator) 103 (Constructing a controller that performs waveform correction)
IC 104 (generates a vibration signal) IC 105 (generates an audio signal)

Claims (1)

[Claims] 1. A frequency and amount of distortion generated when a vibration signal and an audio signal are superimposed and input to the vibration actuator are recorded in advance in a controller of the vibration actuator capable of outputting a vibration signal and an audio signal. And removing a distortion from a superimposed signal based on data recorded in a controller and outputting at least one of a vibration signal and an audio signal.