HK1053622B - Device for driving vibration source - Google Patents

Description

Vibration source driving device

Technical Field

The present invention relates to a vibration source driving device, and more particularly, to a vibration source driving device for realizing a vibration function of a mobile phone or the like.

Background

A conventional cellular phone or the like is configured such that a vibrator is driven at the time of an incoming call in order to inform the incoming call by vibration in addition to a sound such as a musical tune. The vibrator is generally configured to generate vibration by eccentrically attaching a weight to a rotating shaft of a rotor of a DC motor and driving the rotation of the weight.

The conventional cellular phone or the like can be configured such that, upon an incoming call, a vibrator is driven to sound a melody or the like and to notify the incoming call in both sound and vibration.

However, the conventional mobile phone and the like have a problem that the sound and vibration of the tune have no correlation, and therefore, when it is set that the sound and vibration are simultaneously generated to announce an incoming call, a feeling of error occurrence is generated for the user of the mobile phone and the like.

As a vibration source, a vibration horn having a vibration function is known. The vibration horn is configured such that a resonance frequency on the cone side and a resonance frequency on the magnet side are set to be different from each other, and sound output and vibration occur in different frequency band regions. In a conventional cellular phone, a vibration horn is known as not being a constituent component for realizing a vibration function. The reason is that: to reliably generate vibrations using a vibration horn, it is necessary to control the frequency characteristics of the drive system of the vibration horn so as to vary with the variation in the resonance frequency of the vibration horn on the side of the magnet that generates the vibrations. Thus causing a problem of a complicated circuit configuration.

The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a vibration source driving apparatus which, as an apparatus for realizing a vibration function of a portable telephone or the like, correlates a music tune sound with vibration in a case where a sound and vibration are simultaneously generated at the time of an incoming call to inform of the incoming call, thereby allowing a user to feel enjoyment without feeling the occurrence of an error.

Further, a second object of the present invention is to provide a vibration source driving device which can be driven without using a complicated circuit in the case where a vibration horn is used as a vibration source as a device for realizing a vibration function of a cellular phone or the like.

Disclosure of Invention

To achieve the first object of the present invention, the present invention is characterized by comprising: a sound source for generating musical tone signals based on the music data; a vibration source that generates vibrations; a signal extraction unit that extracts a low-frequency portion of the musical tone signal output from the sound source; and a driving device for driving the vibration source based on the musical tone signal of the low frequency portion extracted by the signal extraction device.

In the above configuration, since the signal of the low frequency portion of the musical tone signal outputted from the sound source is extracted and the vibration source is driven based on the musical tone signal of the low frequency portion, when the mobile phone is set to notify an incoming call simultaneously with a sound (melody) and a vibration, the vibration is generated in synchronization with the melody rhythm outputted as an acoustic sound, and thus the user can enjoy the music without feeling a mistake.

Further, features of the invention include: a tone source for generating musical tone signals; a vibration source that generates vibrations; a driving device that drives the vibration source; a switching device provided between the sound source and the vibration source, the switching device being turned on to supply a musical tone signal generated by the sound source to the vibration source; and a control device that drives the sound source based on music data, and controls the driving device so as to drive the vibration source in synchronization with the rhythm signal by controlling on/off of the switching device based on time data indicating a time at which the rhythm signal in the music data is output.

Further, the driving device is an amplifier that amplifies the musical tone signal input from the switching device.

In the above configuration, the vibration source is driven by the low frequency part of the musical tone signal emitted from the sound source by controlling the on/off of the switching means provided between the sound source and the amplifier 22 by the control means based on the time signal representing the output time of the rhythm signal of the rhythm sound among the musical tone signals emitted from the sound source 10, so that when the setting of the mobile phone is to announce the incoming call by both sound (melody) and vibration, vibration occurs in synchronization with the melody rhythm as the acoustic output, thereby obtaining an effect that the user can enjoy without feeling the occurrence of an error.

Further, in order to achieve the second object of the present invention, the present invention is characterized by comprising a vibration source having a sound source for generating a musical tone signal, a first vibration system for generating resonance in a first frequency band region and a second vibration system for generating resonance in a second frequency band region lower than the first frequency band, and generating sound by the first vibration system and generating vibration by the second vibration system; a variable filter for converting a signal transmission band of the musical tone signal outputted from the sound source according to a setting signal inputted from the outside; and a driving device that drives the vibration source based on an output of the variable filter, the variable filter setting a filter constant according to the setting signal in such a manner that, when the vibration source functions only as a vibrator, the variable filter functions as a low-pass filter, making an upper limit frequency of the second frequency band region a cutoff frequency; when the vibration source functions as a speaker for reproducing an acoustic signal, the variable filter functions as a high-pass filter, and the lower limit frequency of the first frequency band region is set to a cutoff frequency; or when the vibration source functions to reproduce an acoustic signal and generate vibration, the variable filter is in a through state in which all signals pass.

The features of the invention include: a sound source for generating musical tone signals and vibration signals; a vibration source having a first vibration system that resonates in a first frequency band region and a second vibration system that resonates in a second frequency band region lower than the first frequency band, the first vibration system generating sound and the second vibration system generating vibration; an adding device for adding the musical tone signal and the vibration signal outputted from the sound source; and a driving means for driving the vibration source based on an output signal of the adding means.

The features of the invention include: a sound source for generating a musical tone signal based on the music data and generating a vibration signal synchronized with the rhythm data based on the rhythm data in the music data; a vibration source having a first vibration system that resonates in a first frequency band region and a second vibration system that resonates in a second frequency band region lower than the first frequency band, the first vibration system generating sound and the second vibration system generating vibration; a rhythm data detection device for detecting rhythm data from the musical tone signal outputted from the sound source and outputting the rhythm data to the sound source; a high-pass filter for removing a bass portion from the musical tone signal; a low-pass filter for removing a high-frequency portion of the vibration signal; an adding means for adding an output signal of the high-pass filter and an output signal of the low-pass filter; and a driving means for driving the vibration source based on an output signal of the adding means.

The present invention is also characterized in that in the vibration source-driving device, the vibration source is a vibration horn.

In the present invention having the above-described configuration, the vibration horn generating sound and vibration in different frequency band regions is used as a vibration source because the vibration source is driven by a signal through the variable filter which can change the frequency characteristics of a musical tone signal output from the sound source according to a setting input, and therefore, in order to generate only sound (sound or voice), only vibration, or both sound and vibration, as an implementation of a vibration function of a cellular phone or the like, when the vibration horn is used as a vibration source, it can be driven with a general horn driving amplifier without a complicated circuit configuration. And when the setting of the mobile phone is to simultaneously inform the incoming call by sound (tune) and vibration, the vibration is generated in synchronization with the rhythm of the tune as the sound output, so that the user can enjoy without feeling error.

In the present invention having the above-described configuration, since the musical tone signal generated by the sound source and the vibration signal corresponding to the resonance frequency region of the vibration system generating vibrations in the vibration horn as the vibration source are used to drive the vibration horn by the addition signal of the musical tone signal and the vibration signal, the vibration horn can be driven by a general horn drive amplifier without using a complicated circuit configuration when the vibration horn is used as the vibration source as the mode of realizing the vibration function of a mobile phone or the like.

When the setting of the mobile phone is to simultaneously notify an incoming call by sound (melody) and vibration, the vibration is generated in synchronization with the rhythm of the melody generated as sound, and therefore, the user can enjoy the music without feeling a mistake.

In the present invention, a signal obtained by removing a low-frequency portion from a musical tone signal outputted from a tone source and a signal for vibration synchronized with a rhythm in the musical tone signal outputted from the tone source are added together, and a vibration horn as a vibration source is driven by the addition output signal. Therefore, when the vibration horn is used as a vibration source, the vibration horn can be driven by a general horn driving amplifier without using a complicated circuit configuration as a mode for realizing the vibration function of a cellular phone or the like.

When the setting of the mobile phone is to simultaneously inform the incoming call by sound (melody) and vibration, the vibration is generated in synchronization with the rhythm of the melody outputted as the sound, and therefore, the user can enjoy the music without feeling the mistake.

Drawings

Fig. 1 is a block diagram showing the configuration of a vibration source driving apparatus according to a first embodiment of the present invention;

FIG. 2 is a characteristic diagram of the frequency characteristics of musical tone signals generated by the tone generator of FIG. 1;

fig. 3 is a characteristic diagram of the frequency characteristic of the low-pass filter shown in fig. 1;

FIG. 4 is a waveform diagram of an output signal of the rectifier circuit shown in FIG. 1;

fig. 5 is a block diagram showing the configuration of a vibration source driving apparatus according to a second embodiment of the present invention;

FIG. 6 is a waveform diagram of an output signal of the comparator shown in FIG. 5;

fig. 7 is a block diagram showing the constitution of a vibration source driving apparatus according to a third embodiment of the present invention;

FIG. 8 is a time chart of the operational state of the sequencer shown in FIG. 7;

FIG. 9 is a schematic explanatory view of a configuration of a vibration horn;

fig. 10 is a block diagram showing the configuration of a vibration source driving apparatus according to a fourth embodiment of the present invention;

fig. 11 is a characteristic diagram of the frequency characteristic of the variable filter shown in fig. 10;

fig. 12 is a block diagram showing the configuration of a vibration source driving apparatus according to a fifth embodiment of the present invention;

FIG. 13 is an explanatory diagram of the content of the vibration signal generated by the sound source shown in FIG. 12;

FIG. 14 is an explanatory diagram of the content of a signal for vibration generated from the sound source shown in FIG. 12;

FIG. 15 is an explanatory diagram of the content of the vibration signal generated by the sound source shown in FIG. 12;

FIG. 16 is an explanatory diagram of the content of the vibration signal generated by the sound source shown in FIG. 12;

FIG. 17 is an explanatory diagram of the content of the vibration signal generated by the sound source shown in FIG. 12;

FIG. 18 is an explanatory diagram of the content of a signal for vibration generated from the sound source shown in FIG. 12;

fig. 19 is a block diagram showing the configuration of a vibration source driving apparatus according to a sixth embodiment of the present invention;

fig. 20 is a block diagram showing the constitution of a vibration source-driving device according to a seventh embodiment of the present invention;

fig. 21 is a block diagram showing the configuration of a vibration source driving apparatus according to an eighth embodiment of the present invention;

fig. 22 is a block diagram showing the configuration of a vibration source driving apparatus according to a ninth embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. The embodiment of the present invention has been described with respect to the case where the present invention is applied to the vibration function of a portable telephone, but the present invention is not necessarily limited to these embodiments.

(first embodiment)

Fig. 1 shows the constitution of a vibration source-driving device according to a first embodiment of the present invention. In the figure, the vibration source driving apparatus of the first embodiment includes a sound source 10 for generating a musical sound signal, a DC motor 24 as a vibration source for generating vibration, a Low Pass Filter (LPF)16 as a signal extracting means for extracting a low frequency component from the musical sound signal output from the sound source 10, a detector circuit 18 for detecting an output signal of the low pass filter 16, a rectifier circuit 20 for rectifying a detection output of the detector circuit 18, and an amplifier 22 as a driving means for driving the vibration source based on the musical sound signal of the low frequency component extracted by the low pass filter 16.

Reference numeral 12 denotes an amplifier which amplifies the musical tone signal output from the sound source 10, 14 denotes a horn which is driven by the output of the amplifier and generates sound based on the musical tone signal, and 26 denotes a light emitting diode for displaying blinking in synchronization with the vibration. The DC motor 24 has a weight attached to its rotation shaft in an eccentric manner, and the portable telephone body is vibrated by rotating the weight. A sound source, such as an FM sound source, outputs musical tone signals based on input music data. The sound source may be any sound source that can generate musical tone signals, such as a PCM sound source.

In the above configuration, when the mobile phone is set to notify an incoming call by sound (music) and vibration, the sound source 10 is driven, and musical tone signals defining a tune are output from the sound source 10 to the amplifier 12 and the low-pass filter 16 based on input music data. As a result, the horn 14 outputs sound based on musical tone signals.

On the other hand, the low-pass filter 16 extracts a musical tone signal of a low-frequency part from the musical tone signal output from the sound source 10.

Fig. 2 shows the frequency characteristics of musical tone signals output from the tone source 10. In the figure, a curve P shows the frequency characteristic of the low-frequency portion in the musical tone signal, and a curve Q shows the frequency characteristic of the high-frequency portion in the musical tone signal. The upper limit frequency of the low frequency part in the musical sound signal is denoted by fc 1. Fig. 3 also shows the frequency characteristic of the low-pass filter 16. As shown in the figure, the filter constant is selected so that the cutoff frequency in the frequency characteristic of the low-pass filter 16 is fc 1. The low-pass filter 16 thereby extracts the low-frequency portion of the frequency characteristic shown by the curve P in the musical tone signal.

The output signal of the low-pass filter 16 is detected by a detector circuit 18, and then a waveform signal shown in fig. 4 is output by a rectifier circuit 20, amplified to a predetermined level by an amplifier 22, and supplied to a DC motor 24 and a light-emitting diode 26. As a result, the DC motor 24 is driven in synchronization with the rhythm of the low-frequency component, for example, a bass range tone, in the musical tone signal output from the sound source 10, and generates vibrations. In addition, the light-emitting diode 26 also flashes off in synchronism with the vibration.

Therefore, a tune obtained by reproducing the musical tone signal output from the sound source 10 is output from the horn 14 as a sound in a range from a low frequency to a high frequency. The DC motor 24 as a vibration source is driven in synchronization with the rhythm sound of the low-frequency part extracted from the musical tone signal, thereby generating vibrations in synchronization with the rhythm sound.

According to the vibration source driving device of the first embodiment of the present invention, when the mobile phone is set to notify an incoming call by both sound (melody) and vibration, the vibration is generated in synchronization with the rhythm of the melody outputted as an acoustic output, so that the user can enjoy the vibration without feeling a mistake.

(second embodiment)

Next, fig. 5 shows the configuration of a vibration source driving device according to a second embodiment of the present invention. The vibration source driving device of the second embodiment differs from the vibration source driving device of the first embodiment in the constitution in that a comparator 30, a reference voltage generating circuit 32, a transistor 34 as a switching element whose opening and closing are controlled by the output of the comparator 30, and a resistor 36 are provided on the output side of the rectifying circuit 20 in fig. 1, wherein a power source Vcc is connected to one end of the DC motor 24 and the light emitting diode 26 through the resistor 36 and the transistor 34, and the other constitution is the same as the vibration source driving device of the first embodiment, and therefore the same portions are denoted by the same symbols and duplicate explanation is omitted.

In the above configuration, when the mobile phone is set to notify an incoming call by both sound (melody) and vibration, the sound source 10 is driven when the incoming call is received, and musical tone signals of a predetermined melody based on the input music data are output from the sound source 10 to the amplifier 12 and the low frequency filter 16. As a result, sound is output from the horn 14 based on the musical tone signal.

On the other hand, the output signal of the low-pass filter 16 is detected and rectified by the detector circuit 18 and the rectifier circuit 20 as described above to obtain a signal as shown in fig. 4. The output signal of the rectifying circuit 20 is compared with a constant reference signal output from a reference voltage generating circuit 32 by a comparator 30, and a pulse train signal as shown in fig. 6 is output to a base of a transistor 34 by the comparator 30. The pulse train signal is a signal corresponding to a low-frequency component in the musical sound signal output from the sound source 10, specifically, a rhythm signal, as in the output signal of the rectifier circuit 20.

The switching of the transistor 34 is controlled by a pulse train signal as an output signal of the comparator 30, so that the power supply of the DC motor 24 and the light emitting diode 26 is controlled.

Therefore, a tune obtained by reproducing the musical tone signal output from the sound source 10 is output from the horn 14 as a sound in a range from a low frequency to a high frequency. The DC motor 24 as a vibration source is driven in synchronization with the rhythm sound of the low-frequency part extracted from the musical tone signal, thereby generating vibrations in synchronization with the rhythm sound. The led 26 then flashes off in synchronism with the vibration.

As described above, in the vibration source driving device according to the second embodiment of the present invention, when the mobile phone is set to notify an incoming call by both sound (melody) and vibration, the vibration is generated in synchronization with the rhythm of the melody outputted as the sound, so that the user can enjoy the vibration without feeling a mistake.

(third embodiment)

Next, fig. 7 shows the configuration of a vibration source-driving device according to a third embodiment of the present invention. The vibration source driving apparatus of the third embodiment differs from the vibration source driving apparatus of the first embodiment in the configuration thereof shown in fig. 1 in that the DC motor as the vibration source is driven by the low frequency part of the musical tone signal output from the sound source 10 by controlling the on and off of the switch 42 by the sequencer 40 based on the time signal indicating the output time of the rhythm signal 42 provided between the sound source and the amplifier 22, the rhythm signal being a rhythm sound in the musical tone signal output from the sound source 10. Since the other configurations are the same as those of the vibration source driving device according to the first embodiment, the same portions are denoted by the same reference numerals, and redundant description is omitted.

In addition, the sequencer 40 has a counter therein. The counter controls the switch 42 to be in an on state during the output of the tempo signal based on the time data of the output of the tempo signal output from the sound source 10 (e.g., FM sound source) while calculating the time. The sequencer 40 corresponds to a control device of the present invention.

In the above configuration, the sequencer 40 has only necessary channels for sequencing data (music data), and controls the drive sound source 10 in parallel with them, thereby generating musical tone signals in a range from low frequencies to high frequencies from the sound source 10. The musical tone signal is supplied to the horn 14 through the amplifier 12, and sound based on the musical tone signal is output from the horn 14.

Further, in the sequencer 40, by displaying data of the time at which the rhythm signal representing the rhythm sound in the sequencing data is output, specifically, by specifying data of each period of the gate times a, B, C, … as shown in fig. 8 (on at times t1, t3, and t 5; off at times t2 and t 4), on and off of the switch 42 is controlled, whereby the rhythm signal is supplied to the DC motor 24 and the light emitting diode 26 as the vibration source through the amplifier 22. As a result, a tune obtained by reproducing the musical tone signal outputted from the sound source 10 is outputted as a sound from the horn 14 from a low frequency to a high frequency range, because the DC motor 24 as a vibration source is driven in synchronization with the rhythm sound of the low frequency part of the musical tone signal outputted from the switch 42 which is turned on and off under the control of the sequencer, thereby generating vibrations in synchronization with the rhythm sound. At this time, the light emitting diode 26 blinks in synchronization with the vibration.

As described above, in the vibration source driving device according to the third embodiment of the present invention, similarly to the first embodiment, when the mobile phone is set to notify an incoming call by both sound (melody) and vibration, the vibration is generated in synchronization with the rhythm of the melody outputted as an acoustic output, so that the user can enjoy the vibration without feeling a mistake.

The fourth to ninth embodiments of the present invention will be described below with respect to a vibration source driving device using a vibration horn as a vibration source. First, fig. 9 shows the structure of the vibration horn. In this figure, the vibrating horn 50 is supported by and connects the edge portion of the cone 52 to the upper end of the frame 56 by the edge 54.

A voice coil 64 is wound around the back side of the center portion of the cone 52, and a voice coil holder 62 is fixed and fitted to the pole piece 60A of the magnet 60. In addition, the lower end of the frame 56 is connected to the upper end of the magnet 60 by a rim 58.

In the vibration horn 50 of the above-described structure, there are two vibration systems, i.e., a first vibration system including the cone 52 and a second vibration system including the magnet 60, wherein the second vibration system resonates in a lower frequency band region than the first vibration system to generate vibration. These vibration systems are designed such that the first vibration system resonates in a first frequency band region, for example, in a frequency band region of 500Hz to 1KHz, and the magnet 60 resonates in a second frequency band region, for example, in a frequency band region of 130Hz to 145 Hz. The cone 52 moves at a constant acceleration in frequencies above the first frequency band region, producing a flowing acoustic output. The magnet has a larger mass than the cone 52 and therefore produces little vibration above 500 Hz.

In addition, the magnet 60 as the second vibration system is designed to resonate between 130Hz and 145Hz, and since the frequency of the second frequency band region is lower than the frequency of the first frequency band region causing the cone 52 to vibrate, the cone 52 is less likely to vibrate, and only the magnet 60 operates. Therefore, no sound is emitted, and vibration is generated. As described above, in the different frequency band regions, the cone constituting the first vibration system emits sound, and the magnet 60 constituting the second vibration system vibrates.

In addition, the vibration horn 50 of the present embodiment is configured to vibrate the magnet 60 as the second vibration system, but the present invention is not limited to this, and for example, a vibration mass (load mass) may be used instead of the magnet 60 and may be connected to the cone by a flexible fitting (コンプライアンス), and therefore, the present invention is also applicable to a configuration in which the vibration mass is used as the second vibration system. That is, the present invention can be applied to a vibration horn including a frame having at least one opening, a vibration plate attached to the frame, an excitation coil attached to the vibration plate via a bobbin, a magnetic circuit arranged to generate a magnetic driving force with respect to the excitation coil, and a load having a predetermined mass and connected to the vibration plate via a device having a mechanical or acoustic flexible member (コンプライアンス). When a low-frequency electric signal is applied to the excitation coil, the load and the vibration plate vibrate integrally by the device having the flexible fitting, and when an audio electric signal is applied to the excitation coil, the vibration force is substantially blocked by the device having the flexible fitting, the vibration plate vibrates, and a sound is emitted from the opening portion of the frame.

(embodiment 4)

Fig. 10 shows the configuration of a vibration source driving device according to a fourth embodiment of the present invention. In the figure, the vibration source driving device of the fourth embodiment includes a sound source (for example, an FM sound source) 10 that generates a musical tone signal based on input music data, a DA converter (DAC)70 that performs digital-to-analog conversion (D/a) on the musical tone signal of the sound source 10, an adder 72 as an adding means that adds an output signal of the DA converter 70 and an analog input (for example, a voice signal) from the outside, a variable filter 74 that is configured such that a frequency band region through which an input signal passes can be changed by a setting signal input from the outside, and an amplifier 76 as a driving means that drives a vibration horn 50 as a vibration source based on an output signal of the variable filter 74.

As shown in fig. 11, the filter constant is set based on the setting signal in such a manner that when the vibration horn 50 functions only as a vibrator, the variable filter 74 has the frequency characteristic (curve a) of a low-pass filter in which the upper limit frequency of the second frequency band region is the cutoff frequency fc1, and when the vibration horn 50 functions as a horn reproducing an acoustic signal, the variable filter 74 has the frequency characteristic (curve b) of a high-pass filter in which the lower limit frequency of the first frequency band region is the cutoff frequency fc2, and when the vibration horn 50 functions to reproduce an acoustic signal and generates vibration, the variable filter 74 is in a through state in which all signals can pass through.

When the variable filter 74 is in the through state and the acoustic and vibration are generated simultaneously by the vibration horn 50, the filter constant is set so that the variable filter 74 has a frequency characteristic capable of adjusting the output of the acoustic and vibration as shown by curves c and d in fig. 11, and a new effect can be generated in accordance with the acoustic and vibration.

In the above configuration, musical tone signals are generated by the sound source 10 based on input music data, and the musical tone signals are input to the DA converter (DAC) 70. The musical tone signal is converted into an analog signal by a DA converter (DAC)70, added to an analog input of voice or the like by an adder 72, and input to a variable filter 74. The variable filter 74 sets the filter characteristics in accordance with the predetermined operation mode setting of the incoming call. That is, any one of the operation modes is selected from a mode a in which an incoming call is notified only by voice (music), a mode B in which an incoming call is notified only by vibration, and a mode C in which an incoming call is notified simultaneously by voice and vibration, and the filter characteristic (frequency characteristic) is set by a setting signal corresponding to each operation mode.

The output signal of the variable filter 74 is amplified by an amplifier 76 and then applied to the vibrating horn 50. When the mode a is set, the filter constant is set so that the variable filter 74 becomes a high-pass filter, and therefore, a sound based on a signal component excluding a low-frequency portion of the musical tone signal output from the sound source 10 is output from the vibration horn 50, or a voice input from the outside is output. When the mode B is set, the filter constant is set so that the variable filter 74 becomes a low-pass filter, and the variable filter 74 extracts a low-frequency part of the musical sound signal output from the sound source 10, so that the vibration horn 50 drives only the magnet 60 to generate vibration.

When the mode C is set, the filter constant is set so that the variable filter 74 is in the through state, and the sound source signal or the analog signal such as the voice output from the sound source 10 is entirely passed through the variable filter 74 and is added to the vibration horn 50, so that when power is supplied, the cone 52 vibrates based on the musical sound signal to generate sound or voice, and the magnet 60 of the vibration horn 50 is driven by the low frequency part of the musical sound signal to generate vibration.

According to the vibration source driving device of the fourth embodiment of the present invention, when the vibration horn is used as the vibration source as the mode for realizing the vibration function of the mobile phone or the like, the vibration source driving device can be driven by the usual horn driving amplifier without using a complicated circuit configuration.

Further, when the mobile phone is set to notify an incoming call by both sound (melody) and vibration, since vibration occurs in synchronization with the rhythm of the melody as an acoustic output, an effect is obtained that the user can enjoy without feeling the occurrence of an error.

(embodiment 5)

The following is a configuration of a vibration source driving device according to a fifth embodiment of the present invention shown in fig. 12.

The vibration source driving apparatus of the present embodiment is different from the vibration source driving apparatus of the fourth embodiment in that the sound source 10 outputs a musical sound signal and a vibration signal without using a variable filter, and a newly provided adder 82 adds the musical sound signal or voice and the vibration signal passed through the DA converter 78 and the low-pass filter 80 to each other as a driving signal for the vibration horn 50. Since the other configurations are the same as those of the vibration source driving device according to the fourth embodiment, the same portions are denoted by the same reference numerals, and redundant description is omitted.

In this figure, a vibration source driving device according to a fifth embodiment includes: a sound source 10 (for example, FM sound source) for generating a signal for vibration while generating a musical tone signal based on the inputted music data, a DA converter (DAC)70 for performing digital-to-analog conversion (D/a) of the musical tone signal output from the sound source 10, an adder 72 for adding together the output signal of the DA converter 70 and an analog input (e.g., a voice signal) from the outside, a DA converter (DAC)78 for performing digital-to-analog conversion (D/A) on the vibration signal outputted from the sound source 10, a low-pass filter 80 for removing a high-frequency part from the output signal of the DA converter 78, an adder 82 as an adding means for adding the output signal of the adder 72 and the output signal of the low-pass filter 80, and an amplifier 76 as a driving means for driving the vibration horn 50 as a vibration source based on an output signal of the adder 82.

The sound source 10 is, for example, an FM sound source. The signal for vibration output from the sound source 10 is a signal in a frequency band region corresponding to a second frequency band region (130Hz to 145Hz) in which the magnet 60 constituting the second vibration system of the vibration horn 50 resonates, and the signal can be generated by various methods. For example, a plurality of sine waves having different frequencies are connected by a pitch setting function of an FM sound source, thereby generating a signal for vibration (see fig. 13 a).

Further, by continuously changing the signal frequency for a while (see fig. 13(B)) or changing the frequency in a stepwise manner for a while (see fig. 13(C)), it is possible to generate a signal for vibration of a frequency band region corresponding to the above-mentioned second frequency band region (130Hz to 145 Hz). Further, by changing the frequency over a period of time within a certain width centered on the center frequency f0 of the above-described second frequency band region (130Hz to 145Hz), a signal for vibration of the frequency band region corresponding to the second frequency band region (130Hz to 145Hz) can be generated (see fig. 13 (D)).

Further, by AM-modulating the carrier wave in the AM modulation section built in the sound source 10, that is, by generating a side wave by the block (エンベロ - プ) setting function of the FM sound source and dispersing the frequency spectrum, a signal for vibration in a frequency band region corresponding to the second frequency band region (130Hz to 145Hz) can be generated (fig. 14). When the vibration signal is generated, a high frequency is generated in a rising portion X of the vibration signal shown in fig. 15 (a). To avoid this, as shown in fig. 15(B), by smoothly changing the amplitude of the vibration signal by the constant setting function and the closed setting function of the FM sound source and changing the frequency for a while, the vibration signal of the frequency band region corresponding to the second frequency band region (130Hz to 145Hz) can be generated.

In addition to the above method, as shown in fig. 16, a carrier wave is subjected to multiple modulation to generate a side wave, a frequency spectrum is dispersed, multiple tones are generated in the vicinity of the center frequency f0 of the second frequency band region (130Hz to 145Hz), and a signal for vibration can be generated in a frequency band region corresponding to the second frequency band region. In fig. 16, for example, f1 is 130, f2 is 132, f3 is 134, f4 is 136, and f5 is 138.

As shown in fig. 17, the sound source 10 is caused to generate a signal as a signal for vibration, and the waveform of the signal is distorted and generated by superimposing a high frequency on a low frequency signal (fig. 17 a). The vibration horn 50 is driven by this signal, and the vibration feeling can be changed.

Although the vibration horn is used as the vibration source in the present embodiment, when the vibrator of the cellular phone is configured by using the vibration motor, signals generated by simulating the vibration form (frequency and amplitude of vibration) of the vibration motor as shown in fig. 18 can be used as the vibration signals, that is, these signals can be used as the drive signals of the vibration motor.

In the configuration shown in fig. 12, musical sound signals and signals for vibration from the sound source 10 are output to the DA converters 70 and 78, respectively. The audio signal is converted into an analog signal by the DA converter 70, and added to an analog input such as a voice by the adder 72. The output of the adder 72, i.e., a musical tone signal or a voice signal, is output to an earphone (or a headphone) or an adder 82.

On the other hand, the vibration signal is converted into an analog signal by a DA converter 78, the high frequency part is removed by a low-pass filter 80, and the signal is added to a musical sound signal or a speech signal by an adder 82. In this manner, the added output signal of the musical sound signal or the speech signal and the vibration signal is amplified by the amplifier 76 and supplied to the vibration horn 50. The vibration horn 50 generates sound in the first frequency band region based on musical tone signals or voice signals, and generates vibration in the second frequency band region based on signals for vibration generated by the sound source 10.

According to the vibration source driving device of the fifth embodiment of the present invention, as an implementation mode for implementing a vibration function of a mobile phone or the like, when a vibration horn is used as a vibration source, it is possible to drive the vibration source by a general horn driving amplifier without using a complicated circuit configuration.

Further, when the mobile phone is set to announce an incoming call simultaneously with sound (melody) and vibration, the vibration signal generated by the sound source can generate vibrations in different ways, and therefore, an effect is obtained that the user feels pleasure without feeling discomfort.

(embodiment 6)

Fig. 19 shows the configuration of a vibration source driving device according to a sixth embodiment of the present invention. The vibration source driving device according to the sixth embodiment is different from the vibration source driving device according to the fifth embodiment in the configuration in that a digital filter 84 is newly provided, and a signal in a frequency band near the center frequency f0 of the second frequency band in which the magnet 60 resonates in the vibration horn 50 is extracted from the random noise output from the random noise generator 10A provided in the sound source 10 that generates the vibration signal for driving the vibration horn 50 as the vibration source by the digital filter 84, and used as the vibration signal. The other configurations are the same as those of the vibration source driving device of the fifth embodiment, and therefore, redundant description is omitted.

The vibration source driving device according to the sixth embodiment of the present invention is similar to the vibration source driving device according to the fifth embodiment, and when a vibration horn is used as a vibration source as an implementation mode of a vibration function of a mobile phone or the like, the vibration source driving device can be driven by a general horn driving amplifier without using a complicated circuit configuration, and the above-described effects can be obtained.

(7 th embodiment)

Fig. 20 below shows the configuration of a vibration source driving device according to a seventh embodiment of the present invention. The vibration source driving device of the seventh embodiment is different from the vibration source driving device of the fifth embodiment in the configuration shown in fig. 12 in that an integrating circuit 90 and a voltage control type amplifier 92 for controlling the increment based on the output signal of the integrating circuit 90 are provided between the adder 72 and the adder 82 in fig. 12, and the other configurations are the same, so that the same portions are denoted by the same reference numerals and the overlapping description is omitted.

In the vibration source driving device of the seventh embodiment, when the portable telephone is set to announce an incoming call in both the sound and vibration modes, musical tone signals are distorted by vibrations generated by driving the magnet 60 of the vibration horn 50, and therefore these distorted signals should be removed.

In fig. 20, when the portable telephone is set to simultaneously notify an incoming call in both voice and vibration modes, a musical tone signal and a vibration signal generated from a sound source 10 are output to DA converters (DACs) 70 and 78, respectively. The musical tone signal is converted into an analog signal by the DA converter 70, and then added to an analog input (e.g., voice) from the outside by the adder 72, and output to the integrating circuit 90. The vibration signal is converted into an analog signal by a DA converter 78, and the high frequency part of the analog signal is removed by a low-pass filter 80 and then output to an adder 82. Further, the vibration signal and the output signal of the voltage control type amplifier 92 are added together by the adder 82 and supplied to the vibration horn 50 through the amplifier 76. The output of the adder 82 is output to an earphone or headphone.

On the other hand, since the vibration generated by driving the magnet 60 of the vibration horn 50 causes AM modulation to be generated in the musical tone signal, the integrating circuit 90 detects the vibration waveform of the magnet 60 of the vibration horn 50 from the output signal of the adder 72, and controls the increment of the voltage control type amplifier 92 based on the output signal of the integrating circuit 90, thereby reversely correcting the AM modulation portion in the output signal of the adder 72. As a result, the tonal components of the musical tone signal due to the vibration of the magnet in the vibrating horn 50 are reduced.

As described above, according to the vibration source driving apparatus of the seventh embodiment of the present invention, the adder 72 adds the musical tone signal and the signal inputted from the outside, the integrator 90 detects the vibration waveform of the magnet 60 of the vibration horn 50 from the signal outputted from the adder, and the increment of the voltage control type amplifier is controlled based on the output signal of the integrator 90, thereby reversely correcting the AM modulation component in the output signal of the adder 72, so that when the setting of the mobile phone is to simultaneously notify an incoming call in terms of both sound and vibration, the musical tone signal modulation component due to the vibration generated by driving the magnet 60 of the vibration horn 50 can be removed.

(embodiment 8)

Fig. 21 below shows the configuration of a vibration source driving device according to an eighth embodiment of the present invention. The vibration source driving device of the eighth embodiment is designed in such a manner that a signal from which a low-frequency portion of a musical tone signal output from a sound source is removed and a signal for vibration synchronized with a rhythm in the musical tone signal output from the sound source are added together, and then the vibration horn is driven by the added output.

In fig. 21, when the setting of the mobile phone is to notify an incoming call by both sound (melody) and vibration, the vibration source driving device of the present embodiment includes: a musical tone signal is generated based on inputted music data, and a sound source 10 (for example, FM sound source) for generating a signal for vibration in synchronization with the rhythm data based on the rhythm data in the musical tone signal, a DA converter (DAC)70 for performing digital/analog conversion (D/A) on the musical tone signal outputted from the sound source 10, an adder 72 for adding an output signal of the DA converter 70 and an analog input (for example, a voice signal) from the outside, and a DA converter (DAC)78 for performing digital/analog conversion (D/A) on the signal for vibration outputted from the sound source 10, a low-pass filter 80 for removing a high frequency part from an output signal of the DA converter 78 are also generated.

Further, the vibration source driving device of the present embodiment further includes: a high-pass filter 104 for removing a low-frequency component from an output signal of the adder 72 and extracting only a high-frequency component, an adder 82 as an adding means for adding an output signal of the high-pass filter 104 and an output signal of the low-pass filter 80, an amplifier 76 as a driving means for driving the vibration horn 50 as a vibration source based on an output signal of the adder 82, a low-pass filter 100 for extracting a low-frequency portion from a musical sound signal output from the adder 72, and a detector circuit 102 for detecting an output signal of the low-pass filter 100 to detect rhythm data and outputting the rhythm data to a sound source. The low-pass filter 100 and the detector circuit 102 correspond to the tempo data detection means of the present invention.

In the above configuration, when the mobile phone is set to notify an incoming call simultaneously with sound (tune) and vibration, the sound source 10 outputs a musical tone signal to the DA converter 70 based on the input music data. The musical tone signal is converted into an analog signal at the DA converter 70, and then added to an analog input (e.g., voice) from the outside by the adder 72, and output to the high-pass filter 104 and the low-pass filter 100. The low-pass filter extracts a low-frequency part of the musical tone signal, detects the low-frequency part by the detector circuit 102, and outputs the low-frequency part to the sound source 10 as rhythm data. The sound source 10 generates a signal for vibration in synchronization with the rhythm data output from the detector circuit 102, and outputs the signal to the DA converter 78. The vibration signal is converted into an analog signal by the DA converter 78, and the high frequency part thereof is removed by the low-pass filter 80 and then output to the adder 82.

The adder 82 adds together the output signal of the high-pass filter 104 and the output signal of the low-pass filter 80, i.e., the musical tone signal from which the low-frequency part is removed and the signal for vibration synchronized with the rhythm data in the musical tone signal, and outputs the result to the amplifier 76 as the driving means. The amplifier 76 drives the vibration horn 50 based on the output signal of the adder 82.

According to the vibration source driving device of the eighth embodiment of the present invention, as an implementation mode of a vibration function of a mobile phone or the like, when a vibration horn is used as a vibration source, it is possible to drive the vibration source by a general horn driving amplifier without using a complicated circuit configuration, and the above-described effects can be obtained. When the setting of the portable telephone is to announce an incoming call simultaneously with sound (tune) and vibration, since vibration occurs in synchronization with the rhythm of the tune as an acoustic output, an effect is obtained that the user feels pleasure without feeling discomfort.

(embodiment 9)

Fig. 22 below shows the configuration of the main part of a vibration source driving device according to a ninth embodiment of the present invention. The vibration source driving device of the ninth embodiment is different from the vibration source driving device of the eighth embodiment in that the vibration source driving device of the eighth embodiment detects rhythm data by the low-pass filter 100 and the detection circuit 102, but the present embodiment is replaced with a signal processing circuit 200 which extracts rhythm data from music data input to a sound source and supplies the rhythm data to the sound source, thereby generating a vibration signal synchronized with the rhythm data from the sound source, and other configurations are the same, and therefore, a repetitive description thereof is omitted.

The vibration source driving device according to the ninth embodiment of the present invention is similar to the vibration source driving device according to the eighth embodiment, and when a vibration horn is used as a vibration source as an implementation mode of a vibration function of a mobile phone or the like, the vibration source driving device can be driven by a general horn driving amplifier without using a complicated circuit configuration, and the above-described effects can be obtained.

Also, when the setting of the mobile phone is to announce an incoming call simultaneously with sound (tune) and vibration, since vibration occurs in synchronization with the rhythm of the tune as an acoustic output, an effect is obtained that the user feels pleasure without feeling discomfort.

Claims (2)

1. A vibration source driving device characterized by comprising:

a tone source for generating musical tone signals;

a vibration source that generates vibrations;

a driving device that drives the vibration source;

a switching device provided between the sound source and the vibration source, the switching device being turned on to supply a musical tone signal generated by the sound source to the vibration source;

and a control device that drives the sound source based on music data and controls on/off of the switching device based on time data indicating a time at which a rhythm signal in the music data is output.

2. The vibration source driving apparatus according to claim 1, wherein said driving means is an amplifier which amplifies a musical tone signal inputted from said switching means.