JP2009164822A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of generating a voice from a wall surface while suppressing an increase in the number of components and deterioration in sound quality. <P>SOLUTION: A thin television 100 (display device) comprises: a display section 1 displaying a video; and a super-magnetostrictor 30 (oscillating element) generating oscillation by applying electricity. The super-magnetostrictor 30 is fixedly provided on a contact surface 39 to a wall surface 200 on which the display section 1 is mounted, and constituted to generate a voice by oscillating the wall surface 200 by oscillating the super-magnetostrictor 30. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device, and more particularly to a display device having an audio output function.

  Conventionally, a display device having a voice output function is known (for example, see Patent Documents 1 to 4).

  The above Patent Document 1 has a function as a stand for placing a video display device (display unit) on a floor, and a speaker device including a giant magnetostrictive actuator having a giant magnetostrictive element (vibration element) on a leg part. Is disclosed. In this speaker device, the displacement of the giant magnetostrictive element in the giant magnetostrictive actuator is intensively transmitted to the floor due to the weight of the video display device attached to the upper portion of the speaker device. Vibrates and emits sound from the floor.

  Patent Document 2 includes a mirror plate that transmits an image, a television image display unit (display unit) provided so as to be in contact with one of the mirror plates, and a moving coil (vibration element). There is disclosed a television image display device that includes a surface on which a display unit is provided and a speaker unit that is separately provided on the same surface. In this television image display device, by vibrating the moving coil of the speaker unit, the mirror plate in contact with the speaker unit vibrates, and a sound is emitted from the mirror plate, and is displayed on the television image display unit in a bathroom or the like. You can view the image from the other side of the mirror plate.

  Further, in Patent Document 3, a transparent substrate (display unit), an excitation member that is fixed to the transparent substrate and transmits vibrations to the transparent substrate, and is fixed to the excitation member so as to be sandwiched between the transparent substrate and the excitation member. A display device comprising a supported vibration element is disclosed. In this display device, the vibration of the vibration element is transmitted to the transparent substrate and the excitation member, so that the transparent substrate vibrates and sounds are emitted from the transparent substrate.

  In Patent Document 4, a vibrating body (vibrating element), a vibration plate that is in contact with one side of the vibrating body and transmitting vibrations of the vibrating body, and in contact with the other side of the vibrating body, the vibration of the vibrating body is vibrated. An audio output device is disclosed that includes a counter mass that is concentrated and transmitted to the plate side and has a mass sufficiently larger than that of a vibrating body. In this audio output device, the counter mass exerts a sufficiently large inertia force with respect to the force by which the vibrating body is displaced, so that the vibration of the vibrating body is concentrated and transmitted to the diaphragm side. The vibrating surface vibrates, and sound is emitted from the surface in contact with the diaphragm.

JP 2007-158752 A JP 2004-222205 A JP 2004-350156 A JP 2004-266307 A

  However, in the speaker device described in Patent Document 1, it is necessary to use the weight of the video display device attached to the upper portion of the speaker device. For example, when the video display device is attached to a wall surface, There is an inconvenience that the weight cannot be fully utilized. In this case, since the displacement of the giant magnetostrictive element in the giant magnetostrictive actuator cannot be effectively transmitted to the wall surface, it is impossible to generate sound by sufficiently vibrating the wall surface. As a result, when the video display device is attached to the wall surface, there is a problem that the sound quality deteriorates.

  In addition, in the television image display device described in Patent Document 2, a mirror plate is separately required in addition to the television image display unit and the speaker unit in order to be provided so that an image can be viewed in a bathroom or the like. There is a problem that the number of parts increases accordingly.

  Further, in the display device described in Patent Document 3, the vibration transmitted to the transparent substrate after being transmitted to the excitation member after the vibration of the vibration element is transmitted to both the transparent substrate and the excitation member is transparent. It is transmitted later than the vibration transmitted to the base. For this reason, there is a problem that sound quality deteriorates due to interference between two vibrations.

  In addition, the audio output device described in Patent Document 4 has a problem in that the number of parts increases because a counter mass is separately required to concentrate and transmit the vibration of the vibrating body to the diaphragm side. .

  The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to emit sound from the wall surface while suppressing increase in the number of parts and deterioration in sound quality. It is an object of the present invention to provide a display device capable of performing the above.

Means for Solving the Problems and Effects of the Invention

  A display device according to one aspect of the present invention includes a display unit on which an image is displayed and a vibration element that generates vibration by applying electricity, and the vibration element is on a contact surface with a wall surface to which the display unit is attached. On the other hand, it is fixedly installed, and configured to vibrate the wall surface by vibrating the vibration element to emit sound.

  In the display device according to the one aspect, as described above, the vibration element can be transmitted to the wall surface by fixing the vibration element to the contact surface with the wall surface to which the display unit is attached. Since it is possible, a sound can be emitted from the wall surface by vibrating the wall surface. In addition, by installing the vibration element fixedly with respect to the contact surface with the wall surface to which the display unit is attached, the vibration of the vibration element can be effectively transmitted to the wall surface without using the weight of the display unit or the like. it can. Thereby, since a wall surface can be vibrated enough and a sound can be generated, deterioration of sound quality can be controlled. Further, by installing the vibration element fixedly with respect to the contact surface with the wall surface to which the display unit is attached, the vibration of the vibration element is substantially transmitted only to the contact surface with the wall surface to which the display unit is attached. As a result, vibration interference does not occur, and deterioration of sound quality can be suppressed. Moreover, since the vibration element is fixedly installed with respect to the contact surface with the wall surface to which the display unit is attached, it is not necessary to separately provide a counter mass, a mirror plate, or the like, thereby suppressing an increase in the number of components. it can. Note that “adding electricity” includes not only the case where electricity is directly applied, but also the case where the influence is indirectly caused by applying electricity to other members.

  In the display device according to the one aspect, preferably, the display device further includes a fixing portion for fixing the vibration element to the wall surface, and the vibration element is fixed in a state of being pressed against the contact surface with the wall surface by the fixing portion. Yes. If comprised in this way, since a vibration element can be reliably fixed to a contact surface with the wall surface to which a display part is attached, the vibration of a vibration element is reliably transmitted to a wall surface. Thereby, the sound quality of the sound from the wall surface can be improved.

  In the display device according to the above aspect, the vibration element is preferably a giant magnetostrictive element. If constituted in this way, the giant magnetostrictive element has a property that the dimension changes at a high speed of 1000 ppm or more when a magnetic field is applied. Therefore, when the giant magnetostrictive element is vibrated, a wall having a large area is effectively used. Therefore, the sound quality of the sound from the wall surface can be further improved.

  In this case, preferably, a plurality of magnets are further provided so as to sandwich the giant magnetostrictive element in a direction perpendicular to the wall surface, and the magnet provided on the side opposite to the contact surface side with the wall surface is It is pressed in the direction. With this configuration, a magnetic field in a direction perpendicular to the wall surface can be generated in the magnet, so that a bias magnetic field can be applied to the giant magnetostrictive element. As a result, vibration corresponding to the pulse current, which is voice information, can be caused more accurately in the giant magnetostrictive element, so that the sound quality of the voice from the wall surface can be further improved. Further, by pressing the magnet in the direction of the wall surface by the fixing portion, the magnet can be brought closer to the super magnetostrictive element, so that a bias magnetic field can be reliably applied to the super magnetostrictive element.

  In the display device in which the vibration element is a giant magnetostrictive element, preferably, a plurality of magnets are provided so as to sandwich the giant magnetostrictive element in a direction perpendicular to the wall surface, and a vibration plate that transmits the vibration of the giant magnetostrictive element to the wall surface; The magnet provided on the contact surface side with the wall surface is disposed so as to be in direct surface contact with the diaphragm. With this configuration, a magnetic field in a direction perpendicular to the wall surface can be generated in the magnet, so that a bias magnetic field can be applied to the giant magnetostrictive element. As a result, vibration corresponding to the pulse current, which is voice information, can be caused more accurately in the giant magnetostrictive element, so that the sound quality of the voice from the wall surface can be further improved. Further, by pressing the magnet in the direction of the wall surface by the fixing portion, the magnet can be brought closer to the super magnetostrictive element, so that a bias magnetic field can be reliably applied to the super magnetostrictive element. Moreover, since the vibration of the giant magnetostrictive element can be suppressed from being attenuated by the magnet by bringing the magnet into direct surface contact with the diaphragm, the sound quality of the sound from the wall surface can be maintained.

  In the display device according to the one aspect, preferably, the display device further includes an attachment portion that supports the display portion and is fixed to the wall surface, and a fixing member that fixes the attachment portion to the wall surface, and the vibration element includes the wall surface of the attachment portion. The upper part of the attachment part is fixed so as to be in close contact with the wall surface by a fixing member. According to this configuration, for example, in a display device in which the display unit is fixed to the wall surface by the mounting unit via the arm, the sound such as a speaker can be obtained by mounting the vibration element on the contact surface with the wall surface of the mounting unit. Since it is not necessary to attach the generator to the display device, the thickness of the display device can be reduced, and the display portion can be enlarged while maintaining the size of the display device. Moreover, since the upper surface of the attachment portion is brought into close contact with the wall surface by the fixing member, the contact surface with the wall surface at the upper portion of the attachment portion can be prevented from being separated from the wall surface by the weight of the display portion. Sound quality can be maintained.

  The display device according to the above aspect preferably further includes a fixing member for fixing the display unit to the wall surface, the vibration element is attached to a contact surface with the wall surface of the display unit, and the fixing member is a display unit. It is provided integrally with the part. According to this configuration, for example, in a display device in which the back surface of the display unit is fixed to the wall surface, the vibration element is attached to the back surface that is a contact surface with the wall surface of the display unit, thereby reliably Can be fixed to the wall surface, so that the sound quality of the sound from the wall surface can be maintained. Further, since it is not necessary to attach a sound generating device such as a speaker to the front portion of the display device, the display portion can be enlarged while maintaining the size of the display device.

  The display device according to the above aspect preferably further includes a vibration plate that transmits the vibration of the vibration element to the wall surface, and the vibration plate of the vibration element is provided as a part of a contact surface with the wall surface. If comprised in this way, since the diaphragm of a vibration element contacts a wall surface directly, since the vibration of a vibration element can be transmitted to a wall surface reliably and strongly, the sound quality of the sound from a wall surface is improved further. Can be made.

  In the display device according to the above aspect, preferably, a plurality of vibration elements are provided on the contact surface with the wall surface. If comprised in this way, a stereo reproduction | regeneration, multichannel reproduction | regeneration, etc. can be performed by varying the vibration of a vibration element, respectively. In addition, since the vibration transmitted to the wall surface can be made stronger by synchronizing the vibrations of the plurality of vibration elements, the sound quality of the sound from the wall surface can be further improved.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is an overall perspective view of a flat-screen television according to a first embodiment of the present invention. FIG. 2 is an overall side view of the flat-screen television according to the first embodiment of the present invention shown in FIG. 3 to 5 are views showing a detailed structure of the flat-screen television according to the first embodiment of the present invention shown in FIGS. 1 and 2. With reference to FIGS. 1-5, the flat-screen television 100 by 1st Embodiment of this invention is demonstrated. In the first embodiment of the present invention, a case where the present invention is applied to a flat-screen television 100 which is an example of a display device will be described.

  As shown in FIG. 1, the flat-screen television 100 according to the first embodiment of the present invention includes a display unit 1 on which an image is displayed, and an iron arm unit that supports the display unit 1 and is fixed to a mounting unit 3 described later. 2 is provided. This thin television 100 is fixed to a wall surface 200.

  Here, in the first embodiment, as shown in FIGS. 1 and 2, the flat-screen television 100 supports the arm portion 2 and is fixed so as to be in close contact with the wall surface 200. An iron fixing member 4 for fixing the upper portion of the portion 3 so as to be in close contact with the wall surface 200; a screw 5 for fixing the mounting portion 3 and the fixing member 4; and a nut 6 (see FIG. 3) corresponding to the screw 5; A screw 7 for fixing the fixing member 4 and the wall surface 200 is provided. Specifically, as shown in FIG. 3, the attachment portion 3 includes a screw insertion hole 3 a provided in the upper portion of the attachment portion 3. Further, as shown in FIG. 3, the fixing member 4 has a screw insertion hole 4a and a screw insertion hole 4b. Then, the screw 5 is inserted into the screw insertion hole 4 a of the fixing member 4 and the screw insertion hole 3 a of the attachment portion 3 and fixed by the nut 6, whereby the upper portion of the attachment portion 3 is fixed to the fixing member 4. Is done. Further, the fixing member 4 is fixed to the wall surface 200 by the screw 7 being inserted into the screw insertion hole 4 b of the fixing member 4 and being fixed to the wall surface 200.

  Moreover, in 1st Embodiment, as shown in FIGS. 3-5, the attachment part 3 is the giant magnetostriction which consists of the giant magnetostrictive element 30, the coil 31, a pair of magnet 32 (32a, 32b), and a coil spring. A damper 33 for attenuating the vibration generated by the element 30, an iron diaphragm 34 for transmitting the vibration generated by the giant magnetostrictive element 30 to the wall surface 200, an iron fixing portion 35, the mounting portion 3 and the wall surface 200 The screw 36 is fixed so as to be in close contact with each other, the screw insertion hole 37, and the wiring 38 for transmitting the pulse current, which is audio information from the display unit 1 (see FIGS. 1 and 2), to the coil 31. Specifically, as shown in FIG. 3, the magnetostrictive element 30, the coil 31, a pair of magnets 32 (32 a and 32 b), a damper 33, and a diaphragm 34 generate a vibration. A giant magnetostrictive element actuator 300 (see FIGS. 1 and 2) is configured. Further, as shown in FIG. 3, the coil 31 is provided in parallel to the wall surface 200 and so as to surround the giant magnetostrictive element 30, and the pair of magnets 32 includes the giant magnetostrictive element 30 on the wall surface 200. It is provided so as to be sandwiched in a direction perpendicular to (X direction). Further, as shown in FIG. 3, one magnet 32 a provided on the side of the contact surface 39 with the wall surface 200 is provided so as to be in direct surface contact with the diaphragm 34, and the contact surface 39 with the wall surface 200. The other magnet 32 b provided on the side opposite to the side is provided so as to be pressed in the direction of the wall surface 200 (X1 direction) by the fixing portion 35. Further, as shown in FIGS. 3 and 5, the diaphragm 34 is provided as a part of the contact surface 39 with respect to the wall surface 200 of the mounting portion 3, and the direction from the contact surface 39 of the mounting portion 3 to the wall surface 200 ( X1 direction) is slightly protruded. Further, as shown in FIGS. 3 and 4, the fixing portion 35 is provided so as to accommodate the giant magnetostrictive element actuator 300, and the end portion 35 a of the fixing portion 35 is provided so as to contact the attachment portion 3. ing. As shown in FIG. 3, the end portion 35a is fixed to the attachment portion 3 by a screw member 35b. As a result, the giant magnetostrictive element actuator 300 is fixed so as to be pressed against the wall surface 200. In addition, as shown in FIGS. 1, 4, and 5, four giant magnetostrictive element actuators 300 are provided on the contact surface 39 with the wall surface 200. As shown in FIGS. 4 and 5, the mounting portion 3 is fixed to the wall surface 200 by inserting a screw 36 into a screw insertion hole 37 of the mounting portion 3. It is fixed so as to be in close contact with. The giant magnetostrictive element 30 is an example of the “vibrating element” in the present invention.

  Next, the sound generation operation of the flat-screen television 100 according to the first embodiment of the present invention will be described with reference to FIG.

  First, a pulse current which is audio information is output from the display unit 1 (see FIGS. 1 and 2). This pulse current is input to the coil 31 via the wiring 38. When a current flows through the coil 31, a magnetic field is generated in the coil 31. This magnetic field is generated in a direction (X direction) perpendicular to the wall surface 200 because the coil 31 is provided in parallel with the wall surface 200. The magnetic field generated by the coil 31 is combined with the bias magnetic field already applied in the direction perpendicular to the wall surface 200 (X direction) by the pair of magnets 32 (32a, 32b) to displace the giant magnetostrictive element 30. Here, when the pulse current is input to the coil 31, the displacement of the giant magnetostrictive element 30 can be changed in accordance with the change in the magnetic field of the coil 31 due to the pulse current, so that vibration is generated in the giant magnetostrictive element 30. Can be made. This vibration is transmitted to one magnet 32a provided on the contact surface 39 side with the wall surface 200, and is transmitted to the diaphragm 34 in direct surface contact with the magnet 32a. Then, the vibration transmitted to the diaphragm 34 is directly transmitted from the diaphragm 34 to the wall surface 200, thereby generating sound from the wall surface 200. Further, the generated vibration is attenuated by the damper 33 absorbing the vibration.

  In the first embodiment, as described above, the super magnetostrictive element 30 is fixed to the contact surface 39 with the wall surface 200 by the fixing portion 35 in a state of being pressed through the magnet 32a and the diaphragm 34. The magnetostrictive element 30 can be reliably fixed to the wall surface 200. Thereby, without using the weight of the display part 1 and the arm part 2, the vibration of the giant magnetostrictive element 30 can be transmitted substantially only to the wall surface 200, and the wall surface 200 having a large area can be vibrated effectively. Therefore, the sound quality of the sound from the wall surface 200 can be improved.

  In the first embodiment, as described above, the giant magnetostrictive element 30 is fixed to the contact surface 39 with the wall surface 200 by the fixing portion 35 while being pressed through the magnet 32 a and the diaphragm 34. Since there is no need to separately provide a counter mass or a mirror plate, an increase in the number of parts can be suppressed, and an increase in the size of the thin television 100 and an increase in the thickness of the thin television 100 can be suppressed.

  In the first embodiment, as described above, the one magnet 32 a provided on the side of the contact surface 39 with the wall surface 200 is provided so as to be in direct surface contact with the diaphragm 34 and the contact surface with the wall surface 200. One magnet 32 b provided on the side opposite to the 39 side is pressed in the direction of the wall surface 200 (X1 direction) by the fixing portion 35. With this configuration, a bias magnetic field can be applied to the giant magnetostrictive element 30 by generating a magnetic field in the direction perpendicular to the wall surface 200 (X direction) on the magnet 32. As a result, vibration corresponding to the pulse current, which is voice information, can be caused to occur in the giant magnetostrictive element 30 more accurately, so that the sound quality of the voice from the wall surface 200 can be further improved. Moreover, since the magnet 32 can be brought closer to the giant magnetostrictive element 30 by pressing the magnet 32 in the direction of the wall surface 200 (X1 direction) by the fixing portion 35, a bias magnetic field is reliably applied to the giant magnetostrictive element 30. be able to. Further, by directly bringing the magnet 32a into surface contact with the diaphragm 34, it is possible to suppress the vibration of the giant magnetostrictive element 30 from being attenuated by the magnet 32a.

  In the first embodiment, as described above, it is necessary to attach a sound generator such as a speaker to the display unit 1 by attaching the giant magnetostrictive element actuator 300 to the contact surface 39 with the wall surface 200 of the attachment unit 3. Accordingly, the thickness of the thin television 100 can be reduced, and the display unit 1 can be enlarged while maintaining the size of the thin television 100.

  Moreover, in 1st Embodiment, while fixing the upper part of the attachment part 3 to the fixing member 4 as mentioned above, the upper part of the attachment part 3 closely_contact | adheres to the wall surface 200 by fixing the fixing member 4 to the wall surface 200. Therefore, the contact surface 39 with the wall surface 200 in the upper part of the attachment portion 3 can be prevented from being separated from the wall surface 200 due to the weight of the display unit 1.

  In the first embodiment, as described above, the diaphragm 34 is provided as a part of the contact surface 39 with respect to the wall surface 200 of the mounting portion 3 and the direction from the contact surface 39 of the mounting portion 3 to the wall surface 200 (X1 direction). ) To protrude slightly. With this configuration, the vibration of the giant magnetostrictive element 30 is reliably and strongly transmitted to the wall surface 200 when the diaphragm 34 is in direct contact with the wall surface 200, so that the sound quality of the sound from the wall surface 200 is further improved. In addition to being able to improve, even if the wall surface 200 is a hard wall surface 200 such as concrete, the vibration of the giant magnetostrictive element 30 can be transmitted to the wall surface 200 and sound can be emitted.

  Further, in the first embodiment, as described above, by providing four giant magnetostrictive element actuators 300 on the contact surface 39 with the wall surface 200, the vibrations of the giant magnetostrictive element actuators 300 are made different so that stereo reproduction is possible. And multi-channel playback. Further, by synchronizing the vibrations of the four giant magnetostrictive element actuators 300, the vibrations transmitted to the wall surface 200 can be made stronger.

(Second Embodiment)
FIG. 6 is an overall perspective view of a flat-screen television according to the second embodiment of the present invention. FIG. 7 is an overall side view of the flat-screen television according to the second embodiment of the present invention shown in FIG. 8 to 10 are views showing the detailed structure of the flat-screen television according to the second embodiment of the present invention shown in FIGS. 6 to 10, in the second embodiment, unlike the first embodiment, the flat-screen television 700 includes a fixing member 400 b that fixes the display unit 400 to the wall surface 200, and includes the giant magnetostrictive element actuator 300. Is attached to the back surface portion 400a which is a contact surface with the wall surface 200 of the display portion 400, and the fixing member 400b is described as an example provided integrally with the back surface portion 400a of the display portion 400.

  As shown in FIG. 6, the flat-screen television 700 according to the second embodiment of the present invention includes a display unit 400 and a housing 401 (see FIG. 8) that houses an electric base for displaying video on the display unit 400. Is provided. This thin television 700 is fixed to the wall surface 200.

  Here, in the second embodiment, as shown in FIG. 6, the thin television 700 includes a screw 402 that fixes a fixing member 400 b (described later) and the wall surface 200.

  Moreover, in 2nd Embodiment, as shown in FIGS. 6-8, the display part 400 is provided integrally with the iron back part 400a in which the giant magnetostrictive element actuator 300 is provided, and the back part 400a of the display part 400. And an iron fixing member 400b. Specifically, as shown in FIG. 8, the fixing member 400b is provided with a screw insertion hole 400c, and the screw 402 is inserted into the screw insertion hole 400c of the fixing member 400b and fixed to the wall surface 200. Thus, the fixing member 400b is fixed to the wall surface 200. As a result, the back surface portion 400 a of the display unit 400 is fixed to the wall surface portion 200.

  In the second embodiment, nine giant magnetostrictive element actuators 300 are provided on the back surface portion 400a of the display unit 400, which is a contact surface with the wall surface 200, as shown in FIGS.

  In the second embodiment, as described above, the fixing member 400b is provided integrally with the back surface portion 400a of the display unit 400, and the fixing member 400b is fixed to the wall surface 200, so that the back surface portion of the display unit 400 is surely provided. Since 400a can be fixed to the wall surface 200, deterioration of sound quality can be suppressed.

  In the second embodiment, as described above, it is necessary to attach a sound generator such as a speaker to the front part of the display unit 400 by attaching the giant magnetostrictive element actuator 300 to the back surface part 400a of the display unit 400. Accordingly, the display unit 400 can be enlarged while maintaining the size of the thin television 700.

  In the second embodiment, as described above, nine giant magnetostrictive element actuators 300 are provided on the back surface portion 400a of the display unit 400, which is a contact surface with the wall surface 200, so that vibration is greater than in the first embodiment. Therefore, even if the wall surface 200 is a hard wall surface 200 such as concrete, vibration can be transmitted to the wall surface 200 more strongly. , Can utter voice.

  The other configurations and effects of the second embodiment are basically the same as those of the first embodiment. The sound generation operation of the flat-screen television 700 in the second embodiment is the same as that in the first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, the thin televisions 100 and 700 are shown as an example of the display device of the present invention. However, the present invention is not limited to this, and can be applied to a display device other than the thin television such as a monitor. It is.

  In the first embodiment, four giant magnetostrictive element actuators 300 are provided. In the second embodiment, nine giant magnetostrictive element actuators 300 are provided. The number of giant magnetostrictive element actuators 300 is not limited to this, and any number may be provided.

  In the first and second embodiments, the diaphragm 34 is provided as a part of the contact surfaces 39 and 400a with respect to the wall surface 200, and slightly protrudes from the contact surfaces 39 and 400a in the direction of the wall surface 200 (X1 direction). However, the present invention is not limited to these. If the diaphragm 34 is in direct contact with the wall surface 200, the diaphragm 34 is slightly moved in the direction from the contact surfaces 39 and 400a to the wall surface 200 (X1 direction). It does not have to be provided so as to protrude. Further, if the vibration of the giant magnetostrictive element 30 is transmitted to the wall surface 200, the diaphragm 34 may not be in direct contact with the wall surface 200.

  Moreover, in the said 1st and 2nd embodiment, although the case where the damper 33 was a coil spring was shown, this invention is not restricted to these, The structure and raw material of a damper will not be limited if it attenuates a vibration. For example, the damper may be a rubber member.

  In the first embodiment, the arm portion 2, the mounting portion 3, the fixing member 4, the diaphragm 34, and the fixing portion 35 are made of iron. In the second embodiment, the back portion 400a and the fixing member 400b are made of iron. However, the present invention is not limited to these, and is not limited to iron as long as it is a material suitable for each durability.

  In the first and second embodiments, the case where a pair of magnets 32 is used to apply a bias magnetic field to the giant magnetostrictive element 30 in a direction perpendicular to the wall surface 200 (X direction) has been described. The invention is not limited to these, and one or three or more magnets may be used.

  In the second embodiment, the fixing member 400b is provided integrally with the display unit 400. However, the present invention is not limited thereto, and the fixing member 400b is not provided integrally with the display unit 400. In addition, a separate fixing member 400b may be provided and fixed to the display unit 400.

  In the first embodiment, the thin TV 100 that fixes the mounting portion 3 to the wall surface 200 via the arm portion 2 is used. In the second embodiment, the thin TV 700 that fixes the back surface portion 400a to the wall surface 200 is used. However, the present invention is not limited to these, and if the vibration of the giant magnetostrictive element 30 is transmitted to the wall surface 200 and sound is generated from the wall surface 200, the thin TV 100 and 700 are fixed to the wall surface 200. Also good.

  In the first and second embodiments, the giant magnetostrictive element 30 is used as the vibration element. However, the present invention is not limited to this, and any vibration element that generates vibration by applying electricity may be used. For example, a piezoelectric element or a magnetostrictive vibrator may be used.

1 is an overall perspective view of a flat-screen television according to a first embodiment of the present invention. 1 is an overall side view of a flat-screen television according to a first embodiment of the present invention. It is sectional drawing of the arm part and attachment part which followed the 500-500 line | wire in FIG.1, FIG.4 and FIG.5 by 1st Embodiment of this invention. It is a front view of an attachment part and a fixed part seen from X1 direction (refer to Drawing 3) which is a wall surface direction by a 1st embodiment of the present invention. It is a rear view of the attaching part and fixing member by 1st Embodiment of this invention. It is a whole perspective view of the thin-screen television by 2nd Embodiment of this invention. It is a whole side view of the thin-screen television by 2nd Embodiment of this invention. FIG. 11 is a cross-sectional view of a flat-screen television taken along line 600-600 in FIGS. 6, 9, and 10 according to a second embodiment of the present invention. It is the front view of a fixing | fixed part and a back part seen from X1 direction (refer FIG. 8) which is a wall surface direction by 2nd Embodiment of this invention. It is a rear view of the thin-screen television by 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,400 Display part 3 Attachment part 4,400b Fixing member 30 Giant magnetostrictive element (vibration element)
32 Magnet 34 Diaphragm 35 Fixing part 39 Contact surface 100, 700 Flat-screen television (display device)

Claims (9)

A display unit for displaying images;
A vibration element that generates vibration by applying electricity;
The vibration element is fixedly installed on a contact surface with a wall surface to which the display unit is attached, and configured to vibrate the wall surface by vibrating the vibration element to emit sound. apparatus. A fixing portion for fixing the vibration element to the wall surface;
The display device according to claim 1, wherein the vibration element is fixed in a state of being pressed against a contact surface with the wall surface by the fixing portion.   The display device according to claim 1, wherein the vibration element is a giant magnetostrictive element. A plurality of magnets provided so as to sandwich the giant magnetostrictive element in a direction perpendicular to the wall surface;
The display device according to claim 3, wherein the magnet provided on the side opposite to the contact surface side with the wall surface is pressed in the direction of the wall surface by the fixing portion. A plurality of magnets provided so as to sandwich the giant magnetostrictive element in a direction perpendicular to the wall surface;
A vibration plate that transmits vibrations of the giant magnetostrictive element to the wall surface;
5. The display device according to claim 3, wherein the magnet provided on the contact surface side with the wall surface is disposed so as to be in direct surface contact with the diaphragm. An attachment portion that supports the display portion and is fixed to the wall surface;
A fixing member for fixing the mounting portion to the wall surface;
The vibration element is attached to a contact surface of the attachment portion with the wall surface, and an upper portion of the attachment portion is fixed to be in close contact with the wall surface by the fixing member. The display apparatus of any one of -5. A fixing member for fixing the display unit to the wall surface;
The said vibration element is attached to the contact surface with the said wall surface of the said display part, and the said fixing member is provided integrally with the said display part. The display device described in 1. A vibration plate for transmitting the vibration of the vibration element to the wall surface;
The display device according to claim 1, wherein the diaphragm of the vibration element is provided as a part of a contact surface with the wall surface.   The display device according to claim 1, wherein a plurality of the vibration elements are provided on a contact surface with the wall surface.

Images