WO2002021881A1

WO2002021881A1 - Display window having voice input/output function

Info

Publication number: WO2002021881A1
Application number: PCT/JP2001/007650
Authority: WO
Inventors: Yuuichi Kanda; Yasuo Oomori
Original assignee: Applied Electronics Laboratories, Inc.
Priority date: 2000-09-04
Filing date: 2001-09-04
Publication date: 2002-03-14
Also published as: AU2001282620A1

Abstract

An apparatus, e.g. a portable telephone, has a display screen provided with a function of microphone and speaker so that the front face of the apparatus can be used widely as the display screen. The display window comprises a light transmitting diaphragm, a member for supporting the diaphragm, a piezoelectric element secured to the diaphragm, and an input/output amplifier for the piezoelectric element. The display window has a voice input/output function arranged such that a vibration caused by a sound pressure applied to the diaphragm is transmitted to the piezoelectric element, an electromotive force induced in the piezoelectric element is taken out as a voltage waveform through an amplifier, the voltage waveform is inputted trough the amplifier to the piezoelectric element which is thereby deformed, the deformation is transmitted, as a vibration, to the diaphragm and a sound is generated therefrom.

Description

Description Display window having voice input / output function Field of the Invention

The present invention relates to an audio input / output device, and more particularly to an audio input / output device that can also serve as a display window of a display device driven mainly by an electronic device such as a liquid crystal display device. According to one aspect of the present invention, the present invention relates to an audio input / output device that can further act as an information input device by pressing a window surface. The present invention further relates to an electronic device provided with the input / output device.

Background of the Invention

Figure 1 shows a typical example of a mobile phone currently in use. The mobile phone 10 includes, as essential components, a liquid crystal display unit 12, a voice input microphone 13, a voice output speaker 14, and the like in addition to the push button unit 11. Since these functions are self-evident, a detailed description thereof will be omitted, but one of the features of the conventional mobile phone is that the display unit 12, the microphone 13, and the speaker 14 are provided independently of each other. .

For electronic devices such as mobile phones, it is necessary to reduce the size and weight of components such as microphones and speakers as much as possible to reduce the size and weight of the entire device. Since it is a conversion element between electrical energy and electrical energy, it cannot be made smaller than a certain level, which is an obstacle to miniaturization of equipment.

On the other hand, in the near future, a larger display device will be required in the near future, considering that e-mails, photos and videos are more frequently transmitted and received from telephones that transmit and receive only audio. It is expected that. In order to respond to this request, it is desirable that almost the entire front of the mobile phone be a display device.

As a conversion element between electric energy and mechanical energy, a piezoelectric element is known, and as shown in FIG. 2, a microphone 20 and a speaker 25 using a piezoelectric element are also known. The microphone 20 covers the periphery of the thin film 21 made of a piezoelectric element. The electromotive force of the thin film sandwiched by 22 and vibrated by external sound pressure is taken out from a set of terminals 23. Similarly, the speaker 25 has a thin-film vibrating body 26 made of a piezoelectric element fixed by an annular frame 27 around the thin-film vibrating body 26, and an electric signal input from a pair of terminals 28. 6 is vibrated and converted into sound waves. When these are used in mobile phones, etc., the thickness can be reduced slightly compared to voice coils or condenser type microphones and speakers, but the front face of the mobile phone must be used for microphones and speakers. Is basically the same as a microphone or speaker using a voice coil. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the related art. Specifically, the present invention displays all the front surfaces of an electronic device having a display unit such as a mobile phone. It is an object of the present invention to provide a voice input / output device that can be used for a unit and an electronic device including the same.

In order to achieve this object, the present invention provides a light-transmitting diaphragm constituting a display window, a support member for supporting the diaphragm, a piezoelectric element fixed to the diaphragm, and a piezoelectric element. And an amplifier that inputs and outputs the piezoelectric element, transmits the vibration caused by the sound pressure received by the diaphragm to the piezoelectric element, extracts the current generated in the piezoelectric element as a voltage waveform through the amplifier, and outputs the voltage waveform through the amplifier. Is input to the piezoelectric element to deform the piezoelectric element, the deformation is transmitted as vibration to the diaphragm, and a display window having a sound input / output function configured to generate sound from the diaphragm is proposed. According to the display window, the display window can be used simultaneously as an audio input / output device, so that the entire surface of the mobile phone excluding the button portion can be used as the display screen.

In addition, by forming a space on both sides of the piezoelectric element by holding a part of the piezoelectric element in a cantilever shape via an intermediate body, the vibration of the deformation of the piezoelectric element is large, and at the same time, the efficiency is high and the sound with a large amplitude is generated. A method for obtaining a body or vibrator is proposed. In addition, for example, at least one thin portion is formed in a housing of a mobile phone, and a piezoelectric element is installed in the thin portion to make a sounding or vibrating body, and at the same time, vibration of the piezoelectric element is not transmitted to the entire housing. Yo In this way, it is also possible to reduce the resonance of the entire housing and improve the sound quality emitted from the piezoelectric element.

According to another aspect of the present invention, the display window further includes a filter for separating an electromotive force of the piezoelectric element due to a sound pressure applied to the diaphragm from an electromotive force of the piezoelectric element due to a mechanical pressing force. The present invention proposes a display window including means for recognizing a mechanical pressing force applied to a moving plate. According to the display screen, it is possible to use the display screen for inputting and outputting voices, and at the same time, input information different from voices by pressing the screen with a finger or the like. The other information is, for example, information such as an instruction to increase the audio output or an instruction to decrease the audio output. As a result, some or all of the functions that were conventionally performed by operating the buttons can be performed from the display screen, and ultimately the entire front surface including the buttons is used as the display. It becomes possible.

According to still another aspect of the present invention, a plate-shaped display element arranged inside an electronic device with a window-shaped display surface displaying the operation of the electronic device facing the outside, and the display of the display device from the outside The protective plate includes a transparent protective plate that covers the surface so that the surface can be seen, and a plate-shaped piezoelectric vibrating element that is attached to an end of the protective plate and vibrates the plate. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a conventional mobile phone device.

FIG. 2 is a diagram showing a conventional microphone and speaker using a piezoelectric element. FIG. 3 shows an embodiment in which the display window having the voice input / output function of the present invention is applied to a mobile phone.

FIG. 4 is a perspective view showing the display window cover taken out.

FIG. 5 is a perspective view showing another embodiment of the display window cover.

FIG. 6 shows an example of a suitable diaphragm installation.

FIG. 7 shows an example of installation of another suitable diaphragm in both FIG. 7a and FIG. 7b.

FIG. 8 is a perspective view showing an electronic apparatus including a piezoelectric element according to another embodiment of the present invention. FIG. 9 is a cross-sectional view showing the vicinity of the piezoelectric element of the embodiment shown in FIG.

FIG. 10 is a sectional view showing a display window and a piezoelectric element attached to the display window. FIG. 11 is a cross-sectional view showing a state where a piezoelectric element having electrode plates attached to both sides is attached to a display window.

FIG. 12 is a cross-sectional view showing a state in which electrode plates are attached to both surfaces of a piezoelectric element. FIG. 13 is an enlarged view showing the vicinity of a display window and a piezoelectric element using a mobile phone as an example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 3 is a perspective view showing an embodiment in which a display window having a voice input / output function according to the present invention is applied to a mobile phone. The mobile phone 30 shown in FIG. 3 has a push-button input unit 31 provided on a main body 35 and a display window 32, and at first glance looks like a conventional mobile phone. However, the conventional mobile phone does not have a speaker and a microphone installed near the tip of the phone, and the display window 32 and the push-button input unit 31 cover almost the entire surface of the phone. It is provided as follows. In this embodiment, the display window has a voice input / output function based on the present invention.

Next, the structure and operation of the display window having a voice input / output function will be described in detail with reference to FIG. FIG. 4 is a perspective view showing, for example, only a portion of the display window cover 40 which is an acrylic molded product. The display window cover 40 is composed of a front surface 41 and two side surfaces 42 and has a substantially C-shaped cross section. In the vicinity of the four corners of the entire surface portion 41, support members 43 made of an elastic body are provided, and these are adhered to the edge of the opening corresponding to the window of the mobile phone main body 35 by bonding. The display window cover 40 is fixed to the main body 35. Since the side surface portion 42 of the display window cover 40 is housed in the main body 35, the side surface portion 4 is provided when the display window cover 40 is attached to the main body 35 and the mobile phone 30 is assembled. 2 cannot be seen from outside. A piezoelectric element 45 is attached to the side surface 42 of the display window cover 40, and the piezoelectric element 45 is attached. Is connected to an input / output circuit (not shown) through necessary conductive wires 44. When the caller has a conversation near the display window cover 40, the display window cover vibrates (deforms) due to the sound pressure of the caller's voice, and this deformation is transmitted from the front part 41 to the side parts 42. It is. The deformation of the side surface portion 42 results in the deformation of the piezoelectric element 45 affixed thereto, thereby generating an electromotive force. The electromotive force is transmitted to a necessary electric circuit via the conductive line 44. With such a configuration, the sound pressure can be extracted as an electric signal, so that the display window cover 40 can be used as if it were a sound collecting microphone. Here, the position where the piezoelectric element 45 is attached to the display window cover 40 should be such that the front surface of the display window is covered by the piezoelectric element, particularly when an opaque ceramic type piezoelectric element is used. It is desirable to attach it to the side so that it does not occur. In particular, by appropriately selecting the position and material of the support member 43 for attaching the display window force bar to the mobile phone main body 35, vibration due to sound pressure can be effectively transmitted to the piezoelectric element. From this viewpoint, the above-described structure in which the support members 43 made of an elastic body are arranged near the four corners of the front surface is one preferable structure.

However, the attachment position of the piezoelectric element is not limited to this example, and may be near the upper side or the lower side of the front surface 41. In addition to the method of supporting the four corners with a small elastic body, the method of supporting the display window cover with respect to the main body is a method of bonding the peripheral part to the front surface in a liquid-tight manner, and providing a packing made of an elastic body at the peripheral part and bonding it to the main body A method may be considered. The indicating member does not necessarily need to be an elastic body, and may be rigidly bonded or fitted to the main body. From the viewpoint of effectively transmitting the vibration of the display window cover due to the sound pressure to the piezoelectric element, it is desirable that the piezoelectric element is apart from the rigidly fixed point.

Further, the display window cover 40 does not necessarily have to have a C-shaped cross section as shown in FIG. 4, and many shapes can be considered. FIG. 5 shows a variation of a display window cover that can be used for a mobile phone. Reference numeral 50 denotes a substantially flat display window cover having a piezoelectric element 51 near the lower side. When installed in a mobile phone, the vicinity of the lower edge of the display window cover is hidden behind the main unit and cannot be seen, so that the piezoelectric element does not disturb the display. There are various ways of supporting the display window cover, and the mechanism for extracting sound pressure from the piezoelectric element as a voltage change is basically the same as that already described with reference to FIG. Many more variants of the display window cover shape One example is that the display window is completely integrated with the body of the mobile phone.

The sounding body composed of the above-mentioned vibration element and display window cover, that is, the combination of the display window cover-40 and the piezoelectric element 45 can be used as a sounding body, that is, as a force together with necessary electronic circuits. it can. In this case, the piezoelectric element is deformed according to the voltage waveform applied to the piezoelectric element 45 from the drive circuit (not shown) via the conductive wire 44, and this deformation causes the entire display window cover 40 to vibrate and sound is generated. Done. Also in this case, the combination of the display window cover 40 and the piezoelectric element 45 shown in the preferred embodiment illustrated in FIG. 4 is extremely efficient as a conversion element from electric energy to mechanical energy. This is because the piezoelectric element is provided at the position of the cantilever projecting from the support member 43 and vibrates.

That is, it is possible to use the display window cover 40 as a microphone and at the same time as a speaker. If the user inputs sound while oscillating as a speaker, the piezoelectric element is obtained from the electromotive force of the piezoelectric element input to the input circuit, that is, information indicating the deformation of the display window cover. By subtracting the drive current input to the piezoelectric element from the drive circuit, the input wave and the output wave can be separated. A piezoelectric element for converting sound pressure into current as a microphone and a piezoelectric element capable of converting current to mechanical vibration as a speaker may be separate. In this case, it goes without saying that it is connected to the necessary electrical circuits.

In Fig. 6, the piezoelectric vibrator 67 has rectangular thin electrodes 62 and 63 formed on both main surfaces of a rectangular piezoelectric plate 69, and is slightly larger than the piezoelectric plate 69 to achieve similar conductivity. It has a configuration in which one electrode 62 is attached to a vibration plate 65, and another example of a suitable piezoelectric element is shown here. The difference from the embodiment shown in FIG. 4 is that only a part of the piezoelectric element vibrating part 68 is attached to the display window cover 40 via the adhesive member 66, and the piezoelectric element vibrating part Most of 8 is that it is supported in a hollow cantilever shape. A gap corresponding to the thickness of the bonding member 66 is provided between the hollow supported portion of the piezoelectric element vibrating section 68 and the display window cover 40. The piezoelectric element vibrating part 68 can be attached to an adhesive member alone, or it can be mechanically supplemented by attaching it to a thin metal or other vibrating plate with relatively large deformability. You can also strengthen it.

With the above-described configuration, the deformation range of the piezoelectric element 69 when a voltage is applied can be increased, and the conversion efficiency from sound pressure to voltage can be improved. At the same time, when used as a large amplitude sound or vibration, vibration can be generated. <Fig. 7a shows another embodiment. In the embodiment shown in FIG. 7a, two parallel grooves or thin portions are formed in the housing, for example, at positions corresponding to the back side of the display section 70, and the grooves at least partially form the periphery. Piezoelectric elements are installed in the divided area. Due to the presence of the groove, the partitioned area is likely to vibrate due to deformation of the piezoelectric element, and the vibration transmitted to the entire housing when the partitioned area vibrates is reduced, so that high sound quality and A loud sound can be obtained.

Further, in another embodiment of FIG. 7B, a thin portion is provided in a part of the housing of the electronic device, and a piezoelectric element is provided in the thin portion. Also in this configuration, as in the above-described grooved structure, the piezoelectric element is easily vibrated, and at the same time, transmission of the vibration to the entire housing is suppressed, so that high sound quality and large volume sound can be generated. become. The display window cover 40 can also be used as a means for inputting information other than voice. That is, when the display window cover is pressed with a finger or the like, the display window cover is deformed, and this deformation can be taken out as a voltage via the piezoelectric element. Deformation when the display window is directly pressed with a finger or the like generally has a much larger amplitude and a different frequency characteristic than that caused by sound waves. Therefore, it is possible to separate the electromotive force due to sound pressure and the electromotive force due to pressing by combining filters with appropriate frequency selectivity. By further developing this method, it is possible to set the power supply to 0 N by pressing once slowly, and to set the power supply to 0 F F by pressing twice quickly. It is also possible to set the operation to raise the volume by tapping the display window cover several times in small increments. Furthermore, the display window cover can be vibrated at a low frequency with a piezoelectric element to be used as a vibrator.

The material of the display window cover can be appropriately selected from polycarbonate, polyethylene, polyurethane, polyvinyl chloride, acrylic resin, glass and the like. Further, the piezoelectric element, AD P, L i Nb 0 3, L i T a0 3, B a 2 N a N b 3 0 1 5, Z nO, C d S, B ii 2 G e 0 2. Single crystalline piezoelectric element which is either a, B a T i 0 ₃ system, PZG - 5, PZG - P b (Mg 1/3 Nb 2/3) 0 3, PZG- I n (L i 3/5 W _{_{2/5) 0 3, PZ GP b}} (S n 1/2 S b 1/2) 0 3, (P b, n d) (T i, M n, T n) 0 3, PVF 2, P b T i 0 ₃ based ceramic Dzukusu piezoelectric element is either a polymer piezoelectric element is a PVF ₂ or rubber / PZT, and, those selected from Z n / 0, a 1 n / a 1 2 0 3 thin film And a piezoelectric element which is a composition represented by the following chemical formula.

(B i ₂ 0 ₂ ) ^{2 +} (Me RxOsx + i) ² -where Me is a mono-, di- or trivalent ion or a mixture thereof,

R is T i ^{4 +} , Nb ^{5 +} , T a ^{5 +} ,

x is an integer of 2 or more.

_{_{Furthermore, P b B i 2 Nb 2}} 0 9, P b B i 2 T a 2 0 9, B aB i 8 T i 2 Nb O!

_{_{2, P b B i 3 T}} i 2 N b 0 1 2 B a B i 4 T i 4 0 1 5, P b B i 4 T i 4 0 1 5, S r B i 2 N ba 0 g. S _{_{r B i 2 T a 2 0}} 9, S r B i 4 T i 4 0 15, N a 5 B i 4 5 T i 4 0 1 5, K 1/2 B i 4 5 i 4 0 J 5, P b ₂ B i ₄ T i ₅ 〇 ₁₈ , S r ₂ B i ₄ T i ₅ 0 ₁₈ , KN b 0 ₃ , N aN b 〇 ₃ , N a T a 0 ₃ , B a F e 0 ₃ , B a T i

_{_{0 3, P b S n0 3}} , P b Z r 0 3, S r T i 0 3, B i C 2 0 3, B i F e 0 3, C e A 103 s L aA 10 3, L a C _{_{o 0 3, L a C 2}} 0 3, L a F e 0 3, L ai n0 3, S r (F e 2/3 W 1/3) 〇 _{_{3, L a (C o 2/3}} N b 1 _{_{/ 3) 0 3, L a}} (C o 2/3 S b 1/3) 0 3, B a (Z n 1/3 n b 2/3) 0 3, P b (C o 1/3 n b _l7 3) 〇 3, L a (C o 2 /3 N b 1/3) 0 3, L a (C o 2/3 S b 1/3) 0 3, B a

_{_{(Z n 1/3 N b 2/3)}} 0 3, P b (C o 1/3 N b 2/3) 0 3, P b (M g 1/3 N b 2/3) 0 3, P _{_{(Mn 1/3 n b 2/3) 0}} 3, P b (n i 1/3 n b 2/3) 0 3, P b (Z n 1/3 n b 2/3) 0 3, S r _{(C u 1/3 S b} 2/3) 0 3, S r (F e 1/3 N b 2/3) 〇 ^{3, ο Γ (Mg i /} 2 N b 2/3) 〇 3, (F _{_{_{e 1/2 N b 1/}}} 2) can be selected from 0 to _3. FIG. 7 is a perspective view showing a mobile phone equipped with a display device provided with a piezoelectric element according to another embodiment of the present invention. In FIG. 7, a housing 100 manufactured by molding a thin metal plate or a synthetic resin plate has a substantially rectangular parallelepiped shape, and a rectangular display window 1229 is formed on the front side to form an interior. A number of buttons displaying numbers, letters, and specific functions are arranged in a matrix in a part other than the display window on the front side.

An antenna 111 protrudes from the top end of the housing 100 in the longitudinal direction, and a transmitter 109 is provided near the lower end. A connector 113 used for connection to an external power supply is provided on a side surface of the housing 100.

As shown in FIG. 8, a slightly larger light-transmitting diaphragm 135 having almost the same shape as the opening provided in the housing is provided inside the housing 100, as shown in FIG. The liquid crystal display element 103 is provided inside thereof so that the surfaces of the liquid crystal display element 103 and the surface thereof coincide with each other. This liquid crystal display element 103 has a color or monochromatic display function such as a TFT type or a DTN type and displays a plurality of character strings and images. A circuit board 13 provided in a case is provided. 1 and is electrically connected to and driven.

On the front side of the liquid crystal display element 103, the liquid crystal display element 103 is made of, for example, a polycarbonate resin plate or an acrylic resin plate that is light-transmitting through a thin spacer 133 mounted on the end thereof. For example, a rectangular diaphragm 135 with a length of about 60 mm and a width of about 40 mm is overlapped, and the periphery of the diaphragm 135 is slightly outward from the edge of the opening 127. It protrudes and closes the opening. Therefore, the diaphragm has a structure that closes the opening of the housing and allows the liquid crystal display element housed inside the housing to be viewed at the same time.

As shown in FIG. 10, for example, a rectangular piezoelectric element 13 7 having a length of about 10 mm, a width of about 40 mm, and a thickness of about 1 mm is provided on the antenna 1 11 1 side on the rear surface of the diaphragm 1 35. A lead wire (not shown) attached thereto is connected to the circuit board 131, described above. Note that FIG. 10 is a drawing in which the front and back sides are reversed as compared with FIG.

As shown in Figs. 10 and 11, the piezoelectric element 1337 has rectangular thin electrode plates 141 and 143 attached to both sides of the rectangular piezoelectric element, and has a slightly higher conductivity than the piezoelectric element. It has a structure formed by attaching one electrode 1 4 1 to the conductive diaphragm 1 4 5 The surface of the conductive diaphragm 145 that is not attached to the piezoelectric element is attached to the diaphragm.

In order to ensure good vibration of the piezoelectric element 1337, a slight gap of about several micrometers is provided between the piezoelectric element 1337 and the display surface of the liquid crystal display element 3. Also, it is desirable to secure a small gap between the diaphragm 135 and the housing 100 by providing a spacer or the like. At least it is desirable not to completely bond the diaphragm. In addition to the configuration in which the piezoelectric element 1337 is attached to the conductive diaphragm 1445, as shown in Fig. 12, the electrode plates 141, 143 are attached to the piezoelectric element to conduct conductive vibration. It is also possible to omit the plate 145 and directly attach it to the diaphragm 135.

The circuit board 1311 described above is provided with a key 105, an antenna 111, a connector 113, and the like in addition to the liquid crystal display element 103, and electronic circuits such as a drive circuit for driving them. The circuit is mounted. When a drive current flows from the drive circuit formed on the circuit board 13 1 to the piezoelectric vibrating element 13 7, the piezoelectric element 13 7 bends and vibrates the vibrating plate 13 5, generating sound from the vibrating plate 13 5 I do.

The display device of the device configured in this manner is provided with a liquid crystal display element 103 inside a housing 100 of a mobile phone provided with a display portion 129 so as to overlap an opening, and a display surface thereof. A light-transmitting vibrating plate 135 is provided at an interval on the side, and a piezoelectric element 133 is attached near the end of the vibrating plate 135, and a structure in which the piezoelectric element is covered by a part of the housing. As a result, a large sound source can be provided without increasing the size of the electronic device as a whole, that is, a large diaphragm area can be secured without pressing other components. From 350 to 350 Hz, a low-range sound pressure level can be ensured, and a natural frequency characteristic that is not particularly emphasized in the high-range sound can be obtained. In addition, since the entire diaphragm constituting the display window vibrates, it is easier to put on the ear and hear more easily than the conventional sounding body having a diameter of about 1 cm. Further, since a high sound pressure level can be ensured by the diaphragm, it is not necessary to separately provide a sound generating element for generating a ring tone, so that the number of parts and the space can be further reduced.

Furthermore, with the above structure, the piezoelectric element can be manufactured by simply pasting the piezoelectric element to the diaphragm constituting the display window, so that the assembly is simple, the manufacturing process is simplified, and the reliability is improved. Can contribute on.

In the above-described embodiment, the configuration is such that the piezoelectric element is covered by the housing.However, the present invention is not limited to this configuration, and there is no particular problem even if the piezoelectric element has a structure in which the piezoelectric element can be seen through a transparent diaphragm. . Further, if a light transmitting material is used for the piezoelectric element and the electrode plate, the liquid crystal display device can be visually observed without any trouble.

In the above-described embodiment, the piezoelectric element 1337 was attached to the antenna side of the diaphragm 135, but the present invention is not limited to this, and as shown in FIG. May be provided on the side of. Alternatively, it can be attached to other positions as described above.

A slight gap around the diaphragm that constitutes the display window is effective in not suppressing vibration, but for that purpose it is necessary to support the diaphragm at several points at about four places. Preferably, even when supported over the entire circumference, good sounding can be performed by supporting with an elastically deformable member. Industrial Applicability The configuration and functions of the display window having a voice input / output function based on the present invention have been described above using a mobile phone as an example, but the scope of the present invention is limited to a mobile phone. Instead, the present invention can be applied to various display devices such as game machines, display panels such as ATMs, computers, and power navigation devices.

Claims

The scope of the claims

1. A light-transmitting diaphragm constituting a display window, a support member for supporting the diaphragm, a piezoelectric element fixed to the diaphragm, and an amplifier for inputting and outputting to and from the piezoelectric element. The vibration due to the sound pressure received by the diaphragm is transmitted to the piezoelectric element, and the current generated in the piezoelectric element is taken out as a voltage waveform through an amplifier.

A display window having a sound input / output function configured to input a voltage waveform to a piezoelectric element via an amplifier to deform the piezoelectric element, transmit the deformation as vibration to the diaphragm, and generate sound from the diaphragm.

2. In addition, it is equipped with a filter that can separate the electromotive force of the piezoelectric element due to the sound pressure applied to the diaphragm from the electromotive force of the piezoelectric element due to the mechanical pressing force. 2. The display window according to claim 1, wherein the display window can recognize a strong pressing force.

3. The method according to claim 1, wherein the diaphragm is made of a material selected from the group consisting of polycarbonate, polyethylene, polyurethane, polyvinyl chloride, acrylic resin, and glass. Display window.

4. The display window according to claim 1, wherein the support member that supports the diaphragm is an elastic member.

5. The piezoelectric element, AD P, one of _{L i Nb 0 3, L i} T a 0 3, B a 2 NaN b 3 0 I 5, Z nO, C d S, B ii 2 G e 0 2 o single crystalline piezoelectric element is, B a T i 0 ₃ system, PZG- 5, PZ G- P b (M 1/3 n b 2/3) 0 3, PZG- I n (L i 3/5 W 2 _{/ 5} ) 0 ₃ , PZ GP b (S n _1/2 S b _1/2 ) 0 ₃ , (P b, N d) (T i, Μη, Τ n) 0 ₃ , PVF ₂ , P b T i 0 ₃ system Serra mix pressure electric element is either a polymer piezoelectric element is a P VF ₂ or rubber / PZT, and were selected from Z n / 0, a 1 n / a 1 2 0 3 thin film 5. The display window according to claim 1, wherein the display window is a display window.

6. The display window according to claim 1, wherein the piezoelectric element is a composition represented by the following chemical formula. (B i ₂ 0 ₂ ) ^{2 +} (M e .- i Rx O sx + i) ² -where Me is a mono-, di- or trivalent ion or a mixture thereof,

R is T i ^{4 +} , Nb ^{5 +} , T a ^{5 +} ,

x is an integer of 2 or more.

7. The piezoelectric _{element, P b B i 2 N b} 2 0 9, P b B i 2 T a 2 0 9, B a B i 8 T i 2 Nb 0 1 2, P b B i 3 T i 2 N b 0 _{1 2} , B a B i ₄ T i ₄ 0 ₁₅ , P b B i ₄ T i ₄ 0 ₁₅ , S r B ia N ba ₀₉ , S r B i ₂ T a ₂ ₀₉ , S r B _{_{_{i 4 T i 4 0 15,}}} N a 5B i 4 5T i 4 0 i 5N j 2 BI 45 T Ϊ 4 θ ΐ 5 tb 2 B i 4T i 5_Rei _{i 8, S r 2 B i} 4 T i 5 O _{! 8 KNb 0 3, N aNb} 0 3, N a T a0 3, B a F E_〇 _{_{3, B a T i 0 3}} , P b S n0 3, P b Z r 0 3, S r T i 0 3s _{_{B i C 2 0 3, B}} i F e O 3, C e A 10 3, L a A 103, L a C o 0 3, L a C 2 0 3, L a F e 0 3, L Aln_〇 ₃ _{, S r (F e 2/3 W} 1/3) 0 3, L a (C o 2/3 N b 1/3) 0 3, L a (C o 2/3 S b 1/3) 0 3 _{, B a (Z n 1/3 n} b 2/3) 0 3, P b (C o 1/3 n bi / 3) 0 3, L a (C o 2/3 n b 1 3) 0 3, _{L a (C o 2/3 S b} 1/3) 0 3, B a (Z n 1/3 Nb 2/3) 0 3, P b (C o 1/3 n b 2/3) 0 3, P b (M g _1/3 Nb _2/3 ) O 3 s P b (Mn _1/3 Nb _2/3 ) 0 ₃ , P b (N i _1/3 Nb _2/3 ) 0 ₃ , P b (Z n _1/3 Nb _2/3 ) 0 ₃ , S r _{_{(C u 1/3 S b 2/3)}} 0 3, S r (F e x / 3 N b 2/3) 0 3, S r (M 1/2 N b 2/3) 0 3, P b (F e _{_1/2} N b _1/2) display window according to claim 6, characterized in that one selected from _0-3.

8. The display window according to claim 1, wherein the diaphragm extends from the display unit to the non-display unit, and the piezoelectric element is adhered to the non-display unit.

9. The piezoelectric element is adhered to the non-display portion via an intermediate, and the intermediate fixes a part of the piezoelectric element and supports the piezoelectric element in a cantilever shape. Not

Display window according to any one of 8 above.

10. The display window according to claim 2, wherein the filter unit separates a sound pressure and a mechanical pressing force applied to the display window based on a frequency component of the electromotive force.

11. The display window according to claim 2, wherein the filter unit separates a sound pressure applied to the display window from a mechanical pressing force based on an absolute value of an electromotive force.

12. The display window according to claim 10, wherein information can be input by pressing the display window.

1 3. In addition, a display window that can vibrate as a so-called vibrator.

14. An electronic device having a display window according to any one of claims 1 to 13.

15. A housing provided with at least one groove is provided, and the piezoelectric element is installed in an area at least partially partitioned from the periphery by the groove, and the piezoelectric element is deformed by deformation of the piezoelectric element. An electronic device characterized in that the vibration of the entire housing is reduced when the partitioned area vibrates.

16. A housing having at least one thin portion is provided, and a piezoelectric element is provided in the thin portion. When the thin portion vibrates due to deformation of the piezoelectric element, the entire housing is formed. Electronic equipment characterized by reduced vibration.