JPH1022538A - High voltage equipment - Google Patents

Abstract

(57) Abstract: Provided is a high-voltage device using a piezoelectric transformer that is smaller and can be driven at a low voltage. A high-voltage device includes a piezoelectric transformer.
And a power supply 80 connected to the primary side of the piezoelectric transformer 200
And a load 90 that is a high-voltage generating unit connected to the secondary side. The piezoelectric transformer 200 includes a piezoelectric ceramic substrate 210, and an upper surface 21 of the piezoelectric ceramic substrate 210.
2 is provided with primary electrodes 222, 226, and secondary electrodes 242, and the lower surface 214 is provided with primary electrodes 224, 228, and secondary electrodes 244, and the primary electrodes 222, 224 are polarized upward. The space between the primary electrodes 226 and 228 is polarized downward. The secondary region d is polarized leftward. The primary electrodes 222 and 226 are connected to one end of the power
Is connected to the primary electrodes 224 and 228 and one end of the load 90, and the other end of the load 90 is connected to the secondary electrode 242.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a high voltage device,
In particular, it relates to a high voltage device using a piezoelectric transformer.

[0002]

2. Description of the Related Art High voltage step-up winding transformers and the like have been used as transformers for use in high voltage devices, but are approaching the limit of high performance in terms of efficiency and size. There is also a need for a high-voltage device that uses a transformer that can be driven with a smaller size and a lower voltage.

[0003]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a high-voltage device using a transformer which can be driven with a smaller size and a lower voltage.

[0004]

According to the present invention, there is provided a piezoelectric transformer, a power supply connected to a primary side of the piezoelectric transformer, and a high voltage generator connected to a secondary side of the piezoelectric transformer. In the high-voltage device, the piezoelectric transformer includes a piezoelectric substrate having a first main surface and a second main surface facing each other, and a piezoelectric substrate in a direction in which the first main surface and the second main surface extend. A piezoelectric transformer using a longitudinal vibration resonance mode in a first direction, which is a predetermined direction, wherein the resonance mode is a resonance mode in which a stress distribution of at least one wavelength or more exists in the first direction. And having at least a first primary region, a second primary region, and a secondary region separated from each other in the first direction, wherein the first primary region is the first region in the first direction. Almost half of the stress distribution at resonance Positive or negative of the said first direction when the resonance has a length long a region where any one of the stresses occurring, the first of said first primary-side region
A first primary electrode and a second primary electrode are provided on the main surface and the second main surface, respectively, so as to face each other, and the first primary electrode and the first primary electrode in the first primary region are provided. Second
Are polarized in a first predetermined direction in a second direction between the first main surface and the second main surface, and the second primary region is polarized in the first direction. A region having a length equal to or less than a half wavelength of the stress distribution at the time of the resonance and in which one of positive or negative stress is generated in the first direction at the time of the resonance, wherein the first primary region is A third primary electrode and a fourth primary electrode are provided on the first main surface and the second main surface, respectively, facing each other, and the third primary side of the second primary region is provided. Between the electrode and the fourth primary electrode in the second direction.
, And one of the first primary region and the second primary region is excited by the other of the first primary region and the second primary region. The first primary region and the second primary region in accordance with the directions of the stresses generated in the first primary region and the second primary region at the time of the resonance so as to vibrate so as to increase the resonance. And the third primary electrode, the fourth primary electrode, the first primary electrode, and the second primary electrode are polarized in predetermined directions of the second direction. The primary side electrode is electrically connectable or connected in a predetermined connection state, a secondary side electrode is provided in the secondary side region, and the secondary side region is polarized in a predetermined direction. Characterized by a piezoelectric transformer 1 of the high voltage device is provided.

[0005] The piezoelectric transformer has a high voltage, a high efficiency, a small size,
It has excellent characteristics such as thinness, non-combustibility, low noise and heat resistance.

In the piezoelectric transformer used in the first high-voltage device of the present invention, the third primary electrode and the fourth primary electrode are provided in addition to the first primary electrode and the second primary electrode.
Since the primary-side electrode is provided, the primary-side electrode area becomes larger, and the input impedance of the piezoelectric transformer decreases. As a result, electric energy is easily supplied from the power supply to the piezoelectric transformer.

Further, one of the first primary region and the second primary region vibrates to increase the resonance excited by the other of the first primary region and the second primary region. As a result, the first primary region and the second primary region are set in the second direction in accordance with the directions of the stresses generated in the first primary region and the second primary region at the time of resonance. And the third primary electrode and the fourth primary electrode and the first primary electrode and the second primary electrode can be electrically connected in a predetermined connection state. Or the primary side region, the resonance of the piezoelectric substrate is further increased by the first primary side region and the second primary side region, and the input electric energy is more efficiently converted into mechanical elastic energy on the primary side. it can.

Note that either one of the first primary region and the second primary region is connected to the first primary region and the second primary region.
In order to vibrate so as to increase the resonance excited by the other region of the primary region, the direction of the stress generated in the first primary region at the time of the resonance is the stress generated in the second primary region at the time of the resonance. Is preferably opposite to the direction of polarization between the third primary electrode and the fourth primary electrode of the second primary region, the direction of polarization of the first primary region of the first primary region. The direction of polarization between the side electrode and the second primary electrode is the same, and the third primary electrode and the second primary electrode are electrically connected, and the fourth primary electrode and the first primary electrode are connected. The side electrodes are electrically connected.

Further, either one of the first primary region and the second primary region is connected to the first primary region and the second primary region.
In order to vibrate so as to increase the resonance excited by the other region of the primary region, the direction of the stress generated in the first primary region at the time of the resonance is the stress generated in the second primary region at the time of the resonance. When the direction is opposite to that of the first primary electrode of the first primary region, the polarization direction between the third primary electrode and the fourth primary electrode of the second primary region is changed to the first primary electrode of the first primary region. The third primary electrode and the first primary electrode are electrically connected while the direction of polarization between the second primary electrodes is opposite, and the fourth primary electrode and the second primary electrode are connected to each other. It is also preferable to electrically connect.

Further, either one of the first primary side region and the second primary side region is connected to the first primary side region and the second primary side region.
In order to vibrate so as to increase the resonance excited by the other region of the primary region, the direction of the stress generated in the first primary region at the time of the resonance is the stress generated in the second primary region at the time of the resonance. In the case of the same direction, the polarization direction between the third primary electrode and the fourth primary electrode in the second primary region is changed to the first primary electrode in the first primary region and the second primary electrode in the second primary region. And the third primary electrode and the first primary electrode are electrically connected, and the fourth primary electrode and the second primary electrode are electrically connected. It is preferable to connect to.

According to the present invention, there is provided a piezoelectric transformer,
In a high-voltage device including a power supply connected to a primary side of the piezoelectric transformer and a high-voltage generating unit connected to a secondary side of the piezoelectric transformer, the piezoelectric transformer has a first main surface and a second main surface facing each other. And a piezoelectric substrate having a second main surface, wherein one direction in which the first main surface and the second main surface extend is a first direction, and the piezoelectric substrate divides the first direction. At least a first primary region, a second primary region and a secondary region, wherein the first primary region of the piezoelectric substrate is substantially equal to the length of the piezoelectric substrate in the first direction. 1 / n (n is an integer of 2 or more), and the first main surface and the second main surface of the first primary region
A first primary side electrode and a second primary side electrode are provided on the main surface of the first primary side electrode so as to face each other, and a first primary side electrode and a second primary side electrode in the first primary side region are provided between Are polarized in a first direction in a second direction between the first main surface and the second main surface, and the second direction of the piezoelectric substrate is
Has a length equal to or less than 1 / n of a length of the piezoelectric substrate in the first direction, and has a first main surface and a second main surface of the second primary region. A third primary side electrode and a fourth primary side electrode are provided on the surface so as to face each other, and the distance between the third primary side electrode and the fourth primary side electrode in the second primary side region is the above-mentioned. The second in the second direction
And the third primary electrode and the fourth primary electrode are electrically connected to the first primary electrode and the second primary electrode in a predetermined connection state. A piezoelectric transformer, wherein the piezoelectric transformer is enabled or connected, a secondary electrode is provided in the secondary region, and the secondary region is polarized in a predetermined direction. Are provided.

The piezoelectric transformer has high voltage, high efficiency, small size,
It has excellent characteristics such as thinness, non-combustibility, low noise and heat resistance.

In the piezoelectric transformer used in the second high voltage device of the present invention, the resonance mode is determined by the input frequency to the primary electrode, the physical properties of the piezoelectric substrate, and the length in the vibration direction. The length of 1 / n of the piezoelectric substrate in the first direction corresponds to a half wavelength of the resonance mode. Therefore, for example, n is 3 when the resonance mode is 1.5 wavelengths, and 2 when the resonance mode is 1 wavelength. Since the resonance mode in the piezoelectric transformer can take any large wave number, n can be an integer of 2 or more.

In the piezoelectric transformer used in the second high-voltage device of the present invention, in addition to the first primary electrode and the second primary electrode, a third primary electrode and a fourth primary electrode are provided. Since the side electrodes are provided, the primary-side electrode area becomes larger, and the input impedance of the piezoelectric transformer decreases. As a result, electric energy is easily supplied from the power supply to the piezoelectric transformer.

Further, the first primary region is the first region of the piezoelectric substrate.
Has a length of about 1 / n (n is an integer of 2 or more) in the direction of
In the first direction of the piezoelectric substrate, a region of the piezoelectric substrate which has a half wavelength length of the stress distribution at the time of resonance and in which one of positive and negative stresses occurs in the first direction at the time of resonance. Since the second primary region has a length of 1 / n or less of the length of the piezoelectric substrate in the first direction, the second primary region has a length in the first direction of the piezoelectric substrate at the time of resonance. It is a region having a length equal to or less than a half wavelength of the stress distribution and generating any one of positive and negative stresses in the first direction at resonance. Then, a first primary electrode and a second primary electrode are provided on the first main surface and the second main surface of the first primary region so as to be opposed to each other, and the first primary electrode and the second primary electrode are provided on the first primary region. The first primary electrode and the second primary electrode are polarized in the second direction in the first predetermined direction in the second direction, and the first primary surface and the second primary surface of the second primary region have third polarities. The first primary electrode and the fourth primary electrode are provided to face each other, and a second predetermined direction is provided between the third primary electrode and the fourth primary electrode in the second primary region in the second direction. And the third primary electrode and the fourth primary electrode and the first primary electrode and the second primary electrode can be electrically connected in a predetermined connection state. Or the stresses generated in the first primary side region and the second primary side region at the time of resonance. Either one of the first primary region and the second primary region vibrates to increase the resonance excited by the other of the first primary region and the second primary region. As a result, the input electric energy can be more efficiently converted into mechanical elastic energy on the primary side.

Note that either one of the first primary region and the second primary region is connected to the first primary region and the second primary region.
In order to vibrate so as to increase the resonance excited by the other region of the primary region, the direction of the stress generated in the first primary region at the time of the resonance is the stress generated in the second primary region at the time of the resonance. Is preferably opposite to the direction of polarization between the third primary electrode and the fourth primary electrode of the second primary region, the direction of polarization of the first primary region of the first primary region. The direction of polarization between the side electrode and the second primary electrode is the same, and the third primary electrode and the second primary electrode are electrically connected, and the fourth primary electrode and the first primary electrode are connected. The side electrodes are electrically connected.

Further, either one of the first primary region and the second primary region is connected to the first primary region and the second primary region.
In order to vibrate so as to increase the resonance excited by the other region of the primary region, the direction of the stress generated in the first primary region at the time of the resonance is the stress generated in the second primary region at the time of the resonance. When the direction is opposite to that of the first primary electrode of the first primary region, the polarization direction between the third primary electrode and the fourth primary electrode of the second primary region is changed to the first primary electrode of the first primary region. The third primary electrode and the first primary electrode are electrically connected while the direction of polarization between the second primary electrodes is opposite, and the fourth primary electrode and the second primary electrode are connected to each other. It is also preferable to make an electrical connection.

Further, either one of the first primary region and the second primary region is connected to the first primary region and the second primary region.
In order to vibrate to increase the resonance excited by the other region of the primary region of the piezoelectric substrate, the distance between the first primary region and the second primary region should be equal to the second distance of the piezoelectric substrate. If the direction of the stress generated in the first primary region at resonance is the same as the direction of the stress generated in the second primary region at resonance, the second primary side The polarization direction between the third primary electrode and the fourth primary electrode in the region is the same as the polarization direction between the first primary electrode and the second primary electrode in the first primary region. Preferably, the third primary electrode and the first primary electrode are electrically connected, and the fourth primary electrode and the second primary electrode are electrically connected.

Preferably, the second primary region is provided between the first primary region and the secondary region.

As described above, by providing the second primary region between the first primary region and the secondary region, the secondary region can be shortened in the first direction. When the secondary side is polarized in the first direction, the output impedance can be reduced. As the output impedance of the piezoelectric transformer decreases, the voltage that can be applied to the load connected to the secondary side of the piezoelectric transformer increases.

Also, by providing the second primary region between the first primary region and the secondary region, the secondary region can be shortened in the first direction, and the secondary region can be reduced. When polarization is performed in the first direction, the absolute voltage applied during polarization is smaller than when the second primary region is not provided. As a result, it is easy to take measures against high voltage, and it is possible to use a power supply for polarization at a lower voltage.

Further, when the load connected to the secondary side of the piezoelectric transformer is a cold cathode fluorescent lamp (CFL), it works more effectively. CFL requires a high voltage of 1 kV or more at the start of discharge. On the other hand, the step-up ratio of the piezoelectric transformer is proportional to Qm, which is the quality factor of the resonator. Before the discharge starts, the impedance of the CFL is close to infinity, so that the step-up ratio is proportional to Qm of the piezoelectric transformer itself.
The boost ratio can be increased. Therefore, even if the secondary region is shortened by providing the second primary region in this manner, and the boosting ratio determined by the shape of the secondary side becomes small, as described above, at the start of discharge, the resonance of the resonator itself is started. Since Qm greatly contributes to the boost ratio, boosting to a voltage at which discharge can be started can be easily performed. When the discharge starts, the impedance of the CFL decreases, but the output impedance of the piezoelectric transformer decreases as described above by providing such a second primary region, so that the voltage applied to the CFL increases accordingly. can do.

Preferably, the secondary region of the piezoelectric transformer is polarized in the first direction parallel to the first main surface and the second main surface. In addition, the secondary region of the first piezoelectric transformer or the second piezoelectric transformer is defined as a direction parallel to the first main surface and the second main surface and substantially perpendicular to the first direction. May be polarized.

The first and second high voltage devices are used for an engine ignition device, an ignition device, a plasma display, an ionizer, an air purifier (dust collector), a deodorizer (toilet, garbage), an ozone generator, and a cathode ray tube. Flyback transformer, converter, inverter, copier, FA
It is suitably applied to X, printers, chargers, insect-proof lamps, AC adapters, isolators, generators, chargers or stun guns (personal protection equipment).

[0025]

Next, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 is a view for explaining a high-voltage device 100 according to a first embodiment of the present invention. FIG. 1A is a perspective view, and FIG. 1B is a cross-sectional view, FIG. 1C is a diagram showing a stress distribution, and FIG. 1D is a diagram showing an amplitude distribution.

The high-voltage device 100 according to the present embodiment is a piezoelectric transformer 200, a power supply 80 connected to the primary side of the piezoelectric transformer 200, and a high-voltage generator connected to the secondary side of the piezoelectric transformer 200. And a load 90.

The high-voltage device 100 according to the present embodiment includes an engine ignition device, an ignition device, a plasma display, an ionizer, an air purifier (dust collector), a deodorizer (toilet, dust), an ozone generator, a flyback transformer for a cathode ray tube. , A converter, an inverter, a copying machine, a facsimile, a printer, a charger, an insect lamp, an AC adapter, an isolator or a stun gun (self-defense equipment).

The piezoelectric transformer 200 has a piezoelectric ceramic substrate 210, and an upper surface 2 of the piezoelectric ceramic substrate 210.
12 is provided with a primary electrode 222 on the left-hand side of the piezoelectric ceramic substrate 210 facing the primary electrode 222.
The primary side electrode 224 is also provided on the lower surface 214 of the.
On the upper surface 212 of the piezoelectric ceramic substrate 210, from a position separated from the primary end surface 216 by a distance of ３ of the length of the longitudinal direction L of the piezoelectric ceramic substrate 210, from the primary end surface 216 to the longitudinal direction L of the piezoelectric ceramic substrate 210. Up to a distance of 2/3 of the length of the primary electrode 22
6, a primary electrode 228 is also provided on the lower surface 214 of the piezoelectric ceramic substrate 210 so as to face the primary electrode 226. The primary electrode 222 is a primary electrode 226
And the primary electrode 224 is separated from the primary electrode 2.
28.

The piezoelectric ceramic substrate 210 between the primary electrode 222 and the primary electrode 224 is polarized upward in the thickness direction T. The piezoelectric ceramic substrate 210 between the primary electrode 226 and the primary electrode 228 is polarized downward in the thickness direction T.

A secondary electrode 242 is provided on the upper surface 212 near the secondary end surface 217, and a secondary electrode 244 is provided on the lower surface 214 near the secondary end surface 217. The secondary region d of the piezoelectric ceramic substrate 210 is polarized leftward in the longitudinal direction L, which is the direction in which the upper surface 212 and the lower surface 214 extend.

The primary electrodes 222, 224, 22
6, 228 and the secondary electrodes 242, 244 extend from the longitudinal end face 218 to the longitudinal end face 219.
Extending over the entire width in the width direction W.

The primary electrodes 222 and 226 are connected to one end of a power supply 80, and the other end of the power supply 80 is connected to primary electrodes 224 and 228 and one end of a load 90.
Is connected to the secondary electrode 242.

In the piezoelectric transformer 200, the primary end face 2
Driving can be performed such that, for example, a 1.5-wavelength vibration mode is set between the secondary end face 217 and the secondary side end face 217. In this case, the piezoelectric ceramic substrate 2
1/6, 3/6 and 5/6 of the length in the longitudinal direction L of 10
Are the nodes 201, 202, 202 of the longitudinal vibration, respectively.
203. In the piezoelectric transformer 200, the left-hand ２ is the primary side region c, and the right-hand １ ／
Is the secondary region d.

In the piezoelectric transformer 200, the primary electrodes 222 and 224 and the primary electrodes 226 and
When a voltage is applied between the piezoelectric transformers 8, an electric field is applied in the thickness direction T in the primary side region c, and the longitudinal vibration in the longitudinal direction L is excited by the piezoelectric transverse effect displaced in the direction perpendicular to the polarization direction. The whole 200 vibrates. Further, on the secondary side, a mechanical strain is generated in the longitudinal direction L, and a potential difference is generated in the polarization direction, so that the secondary electrodes 242 and 244 and the primary electrodes 222 and 224 and the primary electrodes 226 and
A voltage having the same frequency as the primary voltage applied between 28 is extracted. When a drive voltage having a frequency equal to the resonance frequency of the piezoelectric transformer 200 is applied between the primary electrodes 222 and 224 and between the primary electrodes 226 and 228, a very high step-up ratio can be obtained.

Further, in the piezoelectric transformer 200, since the primary side electrode 226 and the primary side electrode 224 are provided in addition to the primary side electrode 222 and the primary side electrode 224, the primary side electrode area becomes larger. Thus, the input impedance of the piezoelectric transformer 200 decreases. As a result, electric energy is easily supplied to the piezoelectric transformer 200 from the power supply 80.

Further, the primary electrode 222 and the primary electrode 2
24, the piezoelectric ceramic substrate 210 has a thickness direction T
, The piezoelectric ceramic substrate 210 between the primary electrode 226 and the primary electrode 228 is polarized downward in the thickness direction T, and the primary electrodes 222 and 226 are connected in common, and the primary electrode 224 and Since the 228 is connected in common, the resonance of the entire piezoelectric ceramics substrate 210 excited by the piezoelectric ceramics substrate 210 between the primary side electrode 222 and the primary side electrode 224 and the primary side electrode 226 and the primary side electrode 228 The resonance of the entire piezoelectric ceramic substrate 210 which is excited by the piezoelectric ceramic substrate 210 during the period increases the other resonance with each other. Therefore, the input electric energy can be more efficiently converted into mechanical elastic energy on the primary side.

The primary electrodes 226 and 228 are provided between the primary electrodes 222 and 224 and the secondary electrodes 242 and 244.

By providing the primary electrodes 226 and 228 in this manner, the secondary region d can be shortened in the longitudinal direction L, and as a result, the output impedance of the piezoelectric transformer 200 can be reduced. When the output impedance of the piezoelectric transformer 200 decreases, the voltage that can be applied to the load 90 connected to the secondary side of the piezoelectric transformer 200 increases.

Further, by providing the primary electrodes 226 and 228 in this manner, the secondary region d can be moved in the longitudinal direction L.
When the secondary region d is polarized in the longitudinal direction L, the absolute voltage applied during polarization is smaller than when the primary electrodes 226 and 228 are not provided. As a result, it is easy to take measures against high voltage, and it is possible to use a power supply for polarization at a lower voltage.

Further, when the load 90 connected to the secondary side of the piezoelectric transformer 200 is a CFL, the piezoelectric transformer 100 operates more effectively. CFL requires a high voltage of 1 kV or more at the start of discharge. On the other hand, the step-up ratio of the piezoelectric transformer 200 is Qm which is the quality factor of the resonator.
Is proportional to Before the discharge starts, the impedance of the CFL is close to infinity, so that the step-up ratio is proportional to Qm of the piezoelectric transformer 200 itself, and the step-up ratio can be increased. Therefore, by providing the primary electrodes 226 and 228 in this way, even if the secondary region d is shortened and the boosting ratio determined by the shape of the secondary side is reduced, the Qm of the resonator itself increases at the start of discharge. Since this greatly contributes to the ratio, the voltage can be easily increased to a voltage at which discharge can be started. When the discharge starts, the impedance of the CFL decreases. However, by providing the primary electrodes 226 and 228 in this manner, the output impedance of the piezoelectric transformer 30 decreases. Therefore, the voltage applied to the CFL must be increased accordingly. Can be.

[0042]

According to the present invention, while utilizing the excellent characteristics of a piezoelectric transformer such as high voltage, high efficiency, small size, thin shape, nonflammability, low noise, heat resistance, etc., a piezoelectric device which can be driven with a smaller size and a lower voltage is used. A high voltage device using a transformer is provided. According to the present invention, an engine ignition device, an ignition device, a plasma display, an ionizer, an air purifier (dust collector), a deodorizer (toilet, garbage), an ozone generator using a piezoelectric transformer having such excellent characteristics. ,
CRT flyback transformer, converter, inverter, copier, FAX, printer, charger, insect-proof light,
An AC adapter, isolator, generator, charger or stun gun is provided.

[Brief description of the drawings]

FIG. 1 is a view for explaining one embodiment of a high voltage generator of the present invention, FIG. 1 (A) is a perspective view, and FIG. 1 (B).
Is a cross-sectional view, FIG. 1C is a view showing a stress distribution, and FIG.
Is a diagram showing an amplitude distribution.

[Description of Signs] 80 power supply 90 load 100 high voltage device 200 piezoelectric transformer 201 to 203 node of vibration 210 piezoelectric ceramic substrate 212 upper surface 214 lower surface 216 primary end surface 217 secondary end surface 218 219 ... Longitudinal end surface 222,224,226,228 ... Primary electrode 242,244 ... Secondary electrode c ... Primary region d ... Secondary region W ... Width direction T ... Thickness direction L ... Longitudinal direction

Claims (3)

[Claims] 1. A high-voltage device comprising a piezoelectric transformer, a power supply connected to a primary side of the piezoelectric transformer, and a high-voltage generator connected to a secondary side of the piezoelectric transformer, wherein the piezoelectric transformers are connected to each other. A piezoelectric substrate having a first main surface and a second main surface opposed to each other, and a first direction which is a predetermined one of directions in which the first main surface and the second main surface extend. Wherein the resonance mode is a resonance mode in which a stress distribution of at least one wavelength or more exists in the first direction, and is separated from each other in the first direction. At least a first primary region, a second primary region, and a secondary region, wherein the first primary region is substantially half-wavelength of the stress distribution at the time of resonance in the first direction. At the time of resonance The first primary region is a region where one of positive or negative stress is generated in the first direction, and the first primary surface and the second primary surface of the first primary region are the first primary electrode. And a second primary electrode are provided to face each other, and between the first primary electrode and the second primary electrode in the first primary region, the first main surface and the second primary electrode are separated from each other. 2
Is polarized in a first predetermined direction in a second direction between the main surfaces of the first and second surfaces, and the second primary region has a length in the first direction that is equal to or less than a half wavelength of the stress distribution at the time of the resonance. And a region in which any one of positive and negative stresses is generated in the first direction at the time of the resonance, and wherein the first main surface and the second main surface of the first primary region have a third stress. Primary electrode and a fourth primary electrode are provided to face each other, and a distance between the third primary electrode and the fourth primary electrode in the second primary region is the second direction. Wherein one of the first primary region and the second primary region is the other of the first primary region and the second primary region. Vibrates to increase the resonance excited by the The first primary region and the second primary region are set in a predetermined direction in the second direction in accordance with the directions of the stresses generated in the first primary region and the second primary region, respectively. And the third primary electrode and the fourth primary electrode are electrically connected to the first primary electrode and the second primary electrode in a predetermined connection state. High voltage, which is enabled or connected, is a piezoelectric transformer in which a secondary electrode is provided in the secondary region, and the secondary region is polarized in a predetermined direction. apparatus. 2. A high-voltage device comprising: a piezoelectric transformer; a power supply connected to a primary side of the piezoelectric transformer; and a high-voltage generator connected to a secondary side of the piezoelectric transformer. A piezoelectric substrate having a first main surface and a second main surface facing each other, wherein one direction in which the first main surface and the second main surface extend is defined as a first direction; Has at least a first primary region, a second primary region and a secondary region that divide the first direction, and the first primary region of the piezoelectric substrate is the first primary region of the piezoelectric substrate. The first main surface and the second main surface of the first primary region have a length of about 1 / n (n is an integer of 2 or more) of the length in the first direction. A first primary electrode and a second primary electrode are provided to face each other,
A first predetermined distance between the first primary electrode and the second primary electrode in the first primary region in a second direction between the first main surface and the second main surface. The second primary region of the piezoelectric substrate has a length of 1 / n or less of the length of the piezoelectric substrate in the first direction, and the second primary region of the second primary region is A third primary electrode and a fourth primary electrode are provided on the first main surface and the second main surface, respectively, facing each other, and the third primary side of the second primary region is provided. Between the electrode and the fourth primary electrode is polarized in the second direction in a second predetermined direction, the third primary electrode, the fourth primary electrode, and the first primary electrode And the second primary electrode is electrically connectable or connected in a predetermined connection state, Secondary electrodes are provided in the following side region, a high-voltage device, wherein the secondary side area is a piezoelectric transformer is polarized in a predetermined direction. 3. The high-voltage device according to claim 1, wherein said second primary region is provided between said first primary region and said secondary region.