JP2952404B2 - Electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device equipped with a piezo element.

[0002]

2. Description of the Related Art FIG. 8 shows an electronic device equipped with a conventional piezo element. As shown in FIG. 8, the piezo element 8 for the mounting function
The piezo element output signal 812 output from the control unit 04 and the electrical control signal 212 generated by the switch
A function control signal 811 input to the control IC 801 and output from the control IC 801 in accordance with each of the input signals.
Thus, the driving of the mounted function 803 was controlled.

[0003]

In the electronic device equipped with the conventional piezo element, the switch means is provided, and the driving of each function of the electronic device is controlled by an electric control signal generated by the switch means. In addition, many switches are required, the size cannot be reduced by the space, and the switching means must be manually switched, which is troublesome.

[0004]

In order to solve the above-mentioned problems, the present invention has the following means. A piezo element of an electronic device equipped with a piezo element is provided with a monitor electrode for outputting an electric shock signal generated from the piezo element when receiving an external shock, and outputting the electric shock signal from the monitor electrode. An electric control signal conversion circuit for converting the output electric shock signal into an electric control signal, and converting the electric shock signal into an electric control signal by the electric control signal conversion circuit; The configuration is such that the drive of each function of the electronic device is controlled by a control signal.

[0005] By taking the above means, the following effects can be obtained. Since an electric control signal for controlling the driving of each function of the electronic device can be generated by applying an impact to a piezo element mounted on the electronic device, a switch for generating an electric control signal corresponding thereto can be generated. Means are not required, and the electronic device can be reduced in size accordingly, and furthermore, labor for manually switching the switch means to generate the electrical control signal is saved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic external view of a piezoelectric transformer using a piezo element according to a first embodiment of the present invention.

A first input electrode 12 and a second input electrode 1 for inputting an electric resonance signal for resonating the piezo element 11
3. When the electric resonance signal is input and the piezo element 11 resonates, the output electrode 14 outputs an electric amplification signal whose amplitude is amplified more than the electric resonance signal generated from the piezo element 11, and the piezo element. A first monitor electrode 15 and a second monitor electrode 16 for monitoring an electric shock signal generated from the piezo element 11 when a shock is applied to the sensor 11 are sandwiched between the first input electrode 12 and the second input electrode 13. The piezo element unit is polled in the A direction 17, and the piezo element unit sandwiched between the first input electrode 12 and the second input electrode 13 and the piezo element unit sandwiched between the output electrodes 14 are poled in the B direction 18. The piezo element portion sandwiched between the first monitor electrode 15 and the second monitor electrode 16 is
Have been polled.

With the above configuration, when the first input electrode 12 and the first monitor electrode are used as a common electrode (GND), and the electric resonance signal is input to the second input electrode 13, the A based on the electric resonance signal The vibration in the direction 17 and the vibration in the B direction 18 resonate, and the electrically amplified signal is obtained between the first input electrode 12 and the output electrode 14. Further, when the piezo element 11 is distorted in the direction of the C direction 19 by the impact, the electric impact signal is obtained between the first monitor electrode 15 and the second monitor signal 16.

The location of the first monitor electrode 15 and the location of the second monitor electrode 16 may be basically any location of the piezo element as long as the electrical shock signal is output, and may be common to other electrodes. Good, but in some places it also picks up other electrical signals. In such a case, it is recommended to provide a means for selectively outputting only an electric shock signal generated when the piezo element receives a shock. Further, as the material of the piezo element, a lead titanate-based material is recommended.

In this embodiment, the case where the electric shock signal can be output by providing the monitor electrode in the piezoelectric transformer using the piezo element has been described. For the input electrode of the element,
If a component using a piezo element such as a piezoelectric buzzer that emits a sound by inputting an electric signal and continuously distorting the component is provided by providing the monitor electrode to the piezo element in the component, It goes without saying that an electric shock signal can be output. Also, the position of the monitor electrode of the piezoelectric element of the piezoelectric buzzer may be basically any place of the piezoelectric element as long as the electric shock signal is output, and may be common to other electrodes. Depending on the location, the electric shock signal may be small or other electric signals may be picked up. In such a case, it is recommended to provide an amplification circuit or to provide a means for selectively outputting only an electric shock signal generated when the piezo element receives a shock.

FIG. 2 shows an electric amplified signal 217 generated by the piezoelectric transformer 207 described in the first embodiment, which is a second embodiment of the present invention, and is an electroluminescent element (hereinafter abbreviated as EL) 208. Function to emit light,
FIG. 4 is a simplified block diagram of a wristband having a function of using an electric shock signal 214 generated in a piezo element used in a piezoelectric transformer 207 as an electric control signal 212 due to an external shock.

A power supply 201, a piezoelectric transformer 207 for generating an electric amplification signal 217 necessary for light emission of the EL 208, a display means 205 for displaying time and the like, and a piezoelectric transformer 207
An electric control signal conversion circuit 203 that converts an electric shock signal 214 generated when a shock is applied to an electric control signal 212, and determines whether or not the electric control signal conversion circuit 203 outputs the electric control signal 212. Mode switching means 204 for generating a mode control signal 213 for switching, an EL 208 for receiving and emitting an electric amplification signal 217, a resonance signal generating circuit 206 for supplying an electric resonance signal 216 to the piezoelectric transformer 207, and a time display on the display means 205. And the like, and a clock IC 202 for outputting a display control signal 211 for performing various displays and an EL emission control signal 215 for controlling the driving of the resonance signal generating circuit 206. further,
The watch IC 203 responds to the electric control signal 212 from the electric control signal conversion circuit 203 by using the display control signal 21.
1 or the EL light emission control signal 215 is changed to control the display on the display means 205 or the light emission of the EL 208.

The following effects are obtained by adopting the above configuration. In the wristwatch according to the present embodiment, in addition to the EL light emitting function, the arm with the wristwatch is swung twice so that the piezoelectric transformer 2
By using the electric shock signal 214 generated by applying the shock twice to the EL 07, the EL 208 is illuminated, for example, by making the EL 208 emit light.
Since the light emission control of 208 and the control of the display means 205 can be performed, the switch means for controlling the above-mentioned functions, which has been conventionally required, is not required, and the size can be reduced. Furthermore, since the drive of each function can be controlled by waving the wrist with the wristwatch, the trouble of manually switching the switch is saved.

In this embodiment, the resonance signal generating circuit 2
06 is shown, but the watch IC 202
Needless to say, if a clock of a certain frequency extracted from the middle of the frequency division stage of the crystal oscillation clock can be used as the electric resonance signal 216, the resonance signal generation circuit 206 can be omitted. Needless to say, even when a function other than the function controlled by the timepiece IC 202 shown in the present embodiment is controlled, it is possible to cope by increasing the pattern of swinging the arm with the wristwatch.

Further, in the present embodiment, the piezoelectric transformer
The wristwatch equipped with the function of emitting L has been described as an example. However, an electronic device equipped with the function or an electronic device equipped with a piezoelectric transformer can be shocked by applying a shock to the piezoelectric transformer described in this embodiment. By adopting a mechanism for converting the generated electric shock signal into an electric control signal, the number of switching means can be reduced, so that the size can be reduced, and it is needless to say that manual switching can be reduced.

FIG. 3 shows an electric control signal conversion circuit 203 and mode switching means 204 according to a second embodiment of the present invention.
FIG. 3 is a simplified block diagram of FIG. First, the electric control signal conversion circuit 203 converts the electric shock signal 214 into the electric pulse signal 311 by using the electric pulse conversion circuit unit 301.
And an electrical control signal conversion circuit unit 302 for converting the electrical pulse signal 311 into the electrical control signal 212.

Further, the electric pulse conversion circuit section 301
It may or may not operate according to the mode control signal 213. That is, the mode control signal 213 can be used to convert the electric shock signal 214 into the electric control signal 212 or not. Next, the mode switching means 204
Are Vdd (hereinafter referred to as HIGH level) and GND.
(Hereinafter referred to as LOW level) switch 3 for selecting
03.

FIG. 4 is a circuit diagram of the electric pulse conversion circuit section 301 shown in FIG. P-channel MOS 404,
P-channel MOS 405, N-channel MOS 406, N
A current mirror type comparator circuit 410 in which channel MOS 407 is connected as shown, and Vref in which a depletion type N-channel MOS 402 and N-channel MOS 403 are connected as shown.
A constant voltage generated by the Vref circuit 420 is input to the gate of the P-channel MOS 406 of the comparator circuit 410, and the gate of the other N-channel MOS 407 is
The electric shock signal 214 is input and the comparator circuit 4
The comparison result of No. 10 is input to one input of the NAND circuit 430, the mode control signal 213 is input to the other input of the NAND circuit 430, and the comparator circuit 410 and the Vref circuit 420 output the mode to the gate. Vdd is connected via a P-channel MOS 401 to which a control signal 213 is input via an inverter circuit 440.

By employing the above configuration, the output of the comparator circuit becomes HI only when the voltage of the electric shock signal 214 is higher than the voltage of the output of the Vref circuit 420.
By inverting from the GH level to the LOW level, the electric shock signal 213 is converted into an electric pulse. That is, since the electric shock signal 214 having a voltage equal to or lower than the output voltage of the Vref circuit 420 is not converted into an electric pulse,
The comparator circuit 410 has a filter function, and when a small shock enough to move the wrist wearing the wristwatch is applied to the piezoelectric transformer, or when the piezoelectric transformer vibrates due to a reaction when a strong shock is applied to the piezoelectric transformer. A low voltage electric shock signal 214 generated from the piezoelectric transformer
Can be cut. Further, the level of the voltage of the electric shock signal 214 to be cut depends on each MO of the Vref circuit 420.
It can be set freely by changing the threshold voltage of S and the design value of each MOS. Further, the comparator circuit 410
The electrical pulse output from the
If the voltage of the mode control signal 213 is LOW level, Vdd is not supplied to the Vref circuit 420 and the comparator circuit 410 and does not operate because the voltage of the mode control signal 213 is LOW level. , The current consumption is suppressed, the electric pulse is not output, and the NAND circuit 430
The electric pulse signal 212 is fixed at a HIGH level.

In this embodiment, the case where the electric pulse conversion circuit section is constituted by MOS has been described. However, if the same function can be obtained, another switch device may be used. Alternatively, a different circuit configuration may be used. Needless to say, an electric shock signal output from a component using a piezo element other than the piezoelectric transformer can be converted into an electric pulse signal.

FIG. 5 is a simplified circuit diagram of the electrical control signal conversion circuit shown in FIG. The first shift register circuit 501, the second shift register circuit 502, the timer circuit 503, and the NAND circuit 504 are connected as shown. The timer circuit 503 includes a first node 511
The electrical pulse signal 212 input through the
When the level rises from the high level to the high level,
Both the falling of the electrical control signal 212 input from the output of the D circuit 504 through the fifth node 515 from HIGH to LOW level are detected, and a reset signal is normally output, but the former is detected. Several hundred milliseconds
During the period, the reset release signal is output to the fourth node, and if the reset release signal is output for several hundred milliseconds.
If the latter is detected between ec, the output period of the reset release signal is extended to several seconds.

The first shift register circuit 501 and the second shift register circuit
The shift register circuit 502 receives the electric pulse signal 212 input via the first node 511 at clock input terminals 522 and 526, and outputs the electric pulse signal 21
2 is detected from the HIGH level to the LOW level, and the voltage data of the data input terminal 521 or 525 at the time of detection is output to the data output terminal 523 or 527. Further, a reset signal or a reset release signal output from the timer circuit 503 via the fourth node 514 is received at the reset input terminal 524 or 528, and when the reset signal is input, the data output terminal 523 or 527 is forcibly applied. Is fixed to the LOW level, and when the reset release signal is input,
Perform the normal operation described above.

The NAND circuit 504 includes a second node 512 connecting the data output terminal 523 of the first shift register circuit 501 and the data input terminal 525 of the second shift register circuit 502, and a second shift register circuit 502. Node 5 connected to data output terminal 527 of
13 is connected to the input, and outputs an electric control signal 212 of LOW level only when both inputs become HIGH level.

By employing the above configuration, the following operations can be performed. When the electric pulse conversion circuit unit is turned off by the mode control signal and the electric pulse signal 212 is fixed at the HIGH level, or from the above state, the electric pulse conversion circuit unit is turned on by the mode control signal, When the electric shock signal is not input to the electric pulse conversion circuit unit and the electric pulse signal is at the LOW level, the data of the first shift register circuit 501 and the second shift register 502 are read by the timer circuit 503. Since the output terminals 523 and 572 are forcibly set to the LOW level, N
Both inputs of the AND circuit 504 become LOW level, and the electrical control signal 212 becomes HIGH level.

The electric shock signal is an electric pulse signal 212
When the pulse waveform is input to the first node 511 only once, the timer circuit 503 detects the rise of the pulse waveform from LOW to HIGH,
Since the reset release signal is output, the first shift register circuit 501 and the second shift register circuit 502 are in an operating state, and the second node 512 is at the HIGH level when the pulse waveform falls from HIGH to LOW level. Since the third node remains at the LOW level,
The electrical control signal 212 output from the NAND circuit 504 is
It remains at the HIGH level, and the second pulse waveform is
When the timer circuit 503 is input for several milliseconds when the output is switched from the reset release signal to the reset signal, the third node also becomes HIGH level, and the electrical control signal 212 of the output of the NAND circuit 504 becomes LOW level. Therefore, the output period of the reset release signal from the timer circuit 503 is postponed to several seconds, and the output of the NAND circuit 504 is at the LOW level until switching to the reset signal. However, if not, the timer circuit 50
3 is a reset signal, and the second node 512
Even if the second pulse waveform is input after that, the operation is the same as when the first pulse waveform is input. Therefore, the electrical control signal 212 output from the NAND circuit 504 becomes HIGH level. Remains.

In other words, if the impact is applied to the piezoelectric transformer two or more times within several milliseconds when the timer circuit 503 outputs the reset release signal, and the pulse waveform is not input to the first node 511 twice or more, LOW level cannot be output as the dynamic control signal 212 for several seconds. Therefore, only when the electric control signal 212 is at the LOW level, the clock I
If C emits EL, a function such as emitting EL for several seconds by shaking the wrist wearing the watch of the present embodiment twice at a certain speed as described above can be realized.

The circuit of the electric pulse signal conversion circuit section described above is an example of a case where an electric control signal that can be generated by one switch is generated. If a more complicated electrical control signal is to be generated, it is recommended to use a combination of several such circuits. Further, another circuit configuration may be used as long as the same function as the circuit can be obtained.

FIG. 6 shows a function of sounding a piezoelectric buzzer according to a third embodiment of the present invention, and a piezo element used in the piezoelectric buzzer receives a shock due to an external shock described in the first and second embodiments. 1 is a simplified block diagram of a wristwatch having a wristband equipped with a function of using an electric shock signal 214 generated upon receiving as an electric control signal 212.

The power supply 201, the distortion signal generation circuit 601 for generating an electric distortion signal 612 necessary for continuously distorting the piezoelectric buzzer 602, the display means 205 for displaying the time and the like, and the piezoelectric buzzer 602 receive an impact. An electric control signal conversion circuit 203 for converting an electric shock signal 214 generated when the electric shock occurs into an electric control signal 212, and a mode for switching whether the electric control signal conversion circuit 203 outputs the electric control signal 212 or not. Mode switching means 204 for generating a control signal 213, a piezoelectric buzzer 602 for receiving an electric distortion signal 612 and sounding a buzzer, and a display control signal 211 for causing the display means 205 to perform various displays such as time display and a distortion signal generation circuit 601. And a clock IC 202 for outputting a buzzer control signal 611 for controlling the driving of the clock. Further, the clock IC 203 changes the display control signal 211 or the buzzer control signal 611 according to the electric control signal 212 from the electric control signal conversion circuit 203, and displays the display means 205 or
The driving of the piezoelectric buzzer 602 is controlled.

The following effects are obtained by adopting the above configuration. In the wristwatch of the present embodiment, in addition to the buzzer function of the piezoelectric buzzer 602, the wrist wearing the wristwatch of the present embodiment has two arms.
By using an electric shock signal 214 generated by applying a shock to the piezoelectric buzzer 602 twice and turning off the sound of the piezoelectric buzzer 602, the number of swings of the arm with the wristwatch can be used. Since the drive of the buzzer 602 and the control of the display means 205 can be performed, a switch means for controlling the above-mentioned functions, which is conventionally required, is not required, and the size can be reduced. Furthermore, since the drive of each function can be controlled by waving the wrist with the wristwatch, the trouble of manually switching the switch is saved.

In this embodiment, the case where the distortion signal generating circuit 601 is provided has been described.
Taken from the middle of the dividing stage of the crystal oscillation clock of 2,
When a clock of a certain frequency can be used as the electric distortion signal 612, it goes without saying that the distortion signal generation circuit 601 can be omitted. Needless to say, even when a function other than the function controlled by the timepiece IC 202 shown in the present embodiment is controlled, it is possible to cope by increasing the pattern of swinging the arm with the wristwatch.

Further, in the present embodiment, a wristwatch equipped with a piezoelectric buzzer has been described as an example. However, an electric device generated by applying an impact to the piezoelectric buzzer described in the present embodiment to an electronic device equipped with the piezoelectric buzzer. By adopting a mechanism for converting a target impact signal into an electrical control signal, the number of switch means can be reduced, so that the size can be reduced, and it goes without saying that manual switching can be reduced.

FIG. 7 shows a fourth embodiment according to the present invention, in which a shock is detected by a shock sensor 702 which outputs an electric shock signal 214 generated when a shock is applied to a piezo element. The electric shock signal 214 described in FIG.
FIG. 1 is a simplified block diagram of a wristwatch having a wristband equipped with a function of using a wristband as an electrical control signal 212.

The power supply 201 receives an electric shock signal 214 generated when the shock sensor 702 is distorted by receiving a shock.
An electric shock signal detecting circuit 701 for converting the electric shock signal 711; a display means 205 for displaying time and the like; an electric control signal converting circuit 203 for converting the electric shock signal 214 to an electric control signal 212; Control signal conversion circuit 2
03 outputs the electric control signal 212 or not.
A mode switching unit 204 for generating a mode control signal 213 for switching, an impact sensor 702 for outputting the electric impact signal 214, and an impact detection signal 711;
The clock IC 202 outputs a display control signal 211 for causing the display unit 205 to display various displays such as a display indicating that a shock has been detected in response to the shock detection signal 711 and a time display. . Further, the clock IC 203 controls various functions such as changing the display control signal 211 according to the electric control signal 212 from the electric control signal conversion circuit 203 and controlling the display of the display means 205.

The following effects are obtained by adopting the above configuration. In the wristwatch of the present embodiment, in addition to the function of detecting an impact by the impact sensor 702, the wrist with the wristwatch of the present embodiment is swung twice to give an electric shock generated by giving an impact to the impact sensor 702 twice. By using the shock signal 214 to switch the contents displayed on the display means 205, or by changing the number of arms of the wristwatch, the display means 20 is displayed.
Since each function such as the control of 5 can be controlled, a switch means for controlling the above-mentioned functions, which is conventionally required, is not required, and the size can be reduced. Furthermore, since the drive of each function can be controlled by waving the wrist with the wristwatch, the trouble of manually switching the switch is saved.

Note that the timepiece IC 202 shown in this embodiment
It is needless to say that even when a function other than the function controlled by the wristwatch is controlled, it can be handled by increasing the pattern of swinging the arm with the wristwatch. Furthermore, in the present embodiment, a wristwatch equipped with an impact sensor has been described as an example, but an electric shock signal generated by giving an impact to the impact sensor described in the present embodiment to an electronic device equipped with the impact sensor is described. By adopting a mechanism for converting to an electrical control signal, it is needless to say that the number of switch means can be reduced, so that the size can be reduced and the trouble of manually switching can be reduced.

[0037]

As described above, by applying the present invention to an electronic device, particularly a portable device, the driving of each function of the electronic device can be controlled by giving an impact to the electronic device. Many switches for controlling the driving of each function, which are required for conventional electronic devices, are not required, so that the size can be reduced and the trouble of manually switching the switches can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic external view showing a piezoelectric transformer using a piezo element according to a first embodiment of the present invention.

FIG. 2 is a simplified block diagram showing a wristwatch having a wristband according to a second embodiment of the present invention.

FIG. 3 is a simplified block diagram showing an electric control signal conversion circuit and mode switching means of a wristwatch having a wristband according to a second embodiment of the present invention.

FIG. 4 is a simplified circuit diagram showing an electric pulse conversion circuit section in an electric control signal conversion circuit of a wristwatch having a wristband according to a second embodiment of the present invention.

FIG. 5 is a simplified circuit diagram showing an electric control signal conversion circuit section in an electric control signal conversion circuit of a wristwatch having a wristband according to a second embodiment of the present invention.

FIG. 6 is a simplified block diagram showing a wristwatch having a wristband according to a third embodiment of the present invention.

FIG. 7 is a simplified block diagram showing a wristwatch having a wristband according to a fourth embodiment of the present invention.

FIG. 8 is a simplified block diagram of a conventional electric device having a built-in piezo element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Piezo element 12 1st input electrode 13 2nd input electrode 14 output electrode 15 1st monitor electrode 16 2nd monitor electrode 203 Electrical control signal conversion circuit 204 Mode switching means 206 Resonance signal generation circuit 207 Piezoelectric transformer 208 EL 212 Electrical Control signal 214 Electrical shock signal 216 Electrical resonance signal 217 Electrical amplification signal 601 Strain signal generation circuit 602 Piezoelectric buzzer 612 Electrical strain signal 701 Electrical shock signal detection circuit 702 Impact sensor

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshifumi Yoshida 1-8-1, Nakase, Mihama-ku, Chiba-shi, Chiba SII Co., Ltd. R-Dicentre Co., Ltd. (72) Inventor Yoshie Ozaki Takaban 1, Meguro-ku, Tokyo No. 6-1-19-207 (72) Inventor Toshiaki Narikawa 2-38-18 Unoki, Ota-ku, Tokyo House 238-A102 (56) References JP-A-47-5726 (JP, A) JP-A-56-102197 (JP, a) JP Akira 56-93500 (JP, a) JitsuHiraku Akira 60-152962 (JP, U) JitsuHiraku Akira 63-99497 (JP, U) (58 ) investigated the field (Int.Cl. ⁶ , DB name) H04R 17/00

Claims (9)

(57) [Claims] 1. An electric shock due to a distortion caused by an external shock.
A piezoelectric element for generating a signal, and an electric shock signal.
An electrical pulse conversion circuit unit for converting into an electrical pulse signal;
Converting the electrical pulse signal into an electrical control signal;
And an electrical control signal conversion circuit section, wherein the electrical pulse conversion circuit section compares a Vref circuit that outputs a reference voltage with the electrical shock signal and the reference voltage.
To output an electrical pulse signal according to the comparison result.
An electronic device , comprising: a parator circuit . 2. The electrical circuit according to claim 1 , wherein said comparator circuit comprises :
When the firing signal has a voltage higher than the reference voltage,
Converting a shock signal into an electric pulse signal
The electronic device according to claim 1 . 3. The electric control signal conversion circuit section,
Pulse change of electrical pulse signal occurs multiple times within a certain time
When generated, an electric control signal is generated in accordance with the electric pulse signal.
The electronic device according to claim 1, wherein the electronic device outputs a signal . 4. An electric shock caused by a distortion caused by an external shock.
A piezoelectric element for generating a signal, and an electric shock signal.
An electrical pulse conversion circuit unit for converting into an electrical pulse signal;
The electrical pulse signal has a plurality of pulse changes within a certain time.
Electrical control in response to the electrical pulse signal
An electrical control signal conversion circuit for outputting a control signal.
Electronic equipment characterized by the following . 5. The electric control signal conversion circuit according to claim 1, wherein :
A shift register circuit, a second shift register circuit,
An immersion circuit and a NAND circuit are provided.
The electronic device according to claim 3 . 6. The first shift register circuit according to claim 1 , wherein
While the signal output from the immer circuit is input,
Detecting the electrical pulse signal and outputting first voltage data
And the second shift register circuit is provided from the timer circuit.
When the output signal and the first voltage data are input,
The second voltage data is detected by detecting the electric pulse signal.
And the NAND circuit outputs the first voltage data and the second voltage
When data is input, the first voltage data and the previous
Outputting an electrical control signal according to the second voltage data.
The electronic device according to claim 5, wherein: 7. The method according to claim 1, wherein said piezo element is generated when it resonates.
That emits light with an electrically amplified signal
While also serving as an element, by the electric control signal
Driving of the electroluminescent element is controlled
The method according to any one of claims 1 to 6, wherein
On-board electronic equipment. 8. The piezo element is continuously distorted.
In addition to serving as a piezoelectric buzzer that generates sound at
The driving of the piezoelectric buzzer is controlled by the electrical control signal.
The method according to claim 1, wherein
An electronic device according to claim 1. 9. The piezo element detects an external impact.
Output shock sensor,
The impact sensor is controlled by a control signal.
The electronic device according to claim 1 .