JP2008283350A - Flexible display audio apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display audio apparatus which allows a display to be functioned also as a speaker diaphragm, directly emits sound from a display surface, is flexibly and freely bent, enables a user to enjoy sounds, and is made compact for carrying, and also to provide a flexible display audio apparatus easily adaptive to a difference in the thickness of a display and providing good playback sound. <P>SOLUTION: The flexible display audio apparatus is provided with: a flexible display 3 being flexible and displaying an image and flexible display driving devices 2 attached to the end parts of the flexible display 3 to vibrate the flexible display 3 and radiate sound. Since the display 3 is flexible, the display 3 is freely bent and functioned also as the speaker diaphragm. The display 3 is held by elastic materials 5 to suppress the generation of abnormal sound due to the lateral vibration of a voice coil 10b and the resonance of the flexible display 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a flexible display acoustic device that vibrates a thin plate-like display itself such as a liquid crystal or an organic EL that can be freely bent to emit sound from the display surface.

  For example, Japanese Patent Application Laid-Open No. 64-34098 exists as an acoustic device that emits sound by vibrating a thin plate-like vibrating body.

FIG. 12 shows the schematic configuration.
In this type of acoustic apparatus, a rectangular film-like diaphragm (100) is provided in a window frame-like frame (103) composed of a pair of longitudinal members (101) and transverse members (102), and the diaphragm ( 100) is supported by a cross member (102), and the diaphragm (100) is vibrated by a vibration plate driving device provided in one of the cross members (102) to produce sound. It was configured as follows.

As another acoustic device, a film acoustic transducer using a piezoelectric polymer film is also known. This film-like acoustic transducer is intended to generate sound waves by expanding and contracting the piezoelectric film in the plane direction by applying a signal voltage between both electrodes of the piezoelectric film, thereby causing the curved film to swing up and down. It is.
JP-A-64-34098

  The diaphragm in the former Japanese Examined Patent Publication No. 7-38758 has a film-like shape and has only a function of producing sound, and there is a problem that a separate display is required in order to enjoy images together with sound.

  In addition, there is a problem that there is a quadrilateral window frame frame around the film, and the film cannot be bent freely, so that it cannot be made compact and easily carried. In addition, there is only one drive unit arranged on one side, and it can be adjusted from the width of the film and the drive force cannot be adjusted. There were also problems such as the need for two.

  Since the latter piezoelectric film speaker is converted into a very small expansion and contraction motion, a very large area is required for low-frequency reproduction. Moreover, the subject that the signal input by a high voltage had to be performed on the characteristic of piezoelectricity occurred.

The present invention has been proposed in view of the above, and the object of the present invention is that a display capable of displaying an image also functions as a speaker diaphragm, can emit sound directly from the display surface, and the display is flexible. An object of the present invention is to provide a flexible display acoustic device that can be freely bent and that can be enjoyed while changing its shape and can be compactly carried.
Another object of the present invention is to provide a flexible display acoustic device that can easily cope with products having different display widths and can obtain a good reproduction sound from low to high.

According to the first aspect of the present invention, a flexible display 3 that is flexible and capable of displaying an image, and a flexible display driving device 2 that is attached to an end of the flexible display 3 and vibrates the flexible display 3 to emit sound. It is characterized by comprising.
According to a second aspect of the present invention, in the flexible display acoustic device according to the first aspect, the flexible display driving device 2 has a rectangular tube shape, and the end portion of the flexible display 3 is housed inside the opening 4a. A case 4, an elastic body 5 that is provided in the opening 4a of the case 4 and holds the flexible display 3, and is housed in the case 4 at an appropriate interval, and supports the end of the flexible display 3, And at least one electrodynamic actuator unit 8 for driving the flexible display 3. The electrodynamic actuator unit 8 has a cut 10a into which an end of the flexible display 3 is inserted, and a voice coil 10b. A voice coil bobbin 10 having A damper 15 to oscillate supporting the bottle 10, wherein the voice coil 10b is constituted by a magnetic circuit having a magnetic gap disposed.
According to a third aspect of the present invention, in the flexible display acoustic device according to the first or second aspect, the flexible display driving device 2 is attached to both ends of the flexible display 3, respectively.

  According to the present invention, since sound is emitted from the display itself, for example, when the screen of the display is a musical instrument being played, it is possible to give an impression of hearing the sound directly emitted from the musical instrument. In addition, when the screen is a speaker's face, it is possible to give the impression that the person who is looking at the screen is talking directly.

  Since the display is flexible, it can be bent freely, so you can enjoy the sound while changing the shape, carry it in a folded state, and save space when you store it.

  Since the flexible display 3 is held by the elastic material 5, it is possible to suppress abnormal noise due to lateral vibration of the voice coil 10 b and resonance of the flexible display 3.

  Stereo sound can be enjoyed by driving the flexible display by installing drive units in both cases at both ends of the flexible display 3.

  Flexible displays 3 having different thicknesses can be easily accommodated by adjusting the length of the case 4 and adjusting the number and position of the electrodynamic actuator units 8.

  In conventional AV equipment, the display device and the audio device are separate, but in the present invention, the display and the speaker are integrated, the overall configuration is simple, and space saving can be achieved.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view of a flexible display acoustic device according to an embodiment of the present invention. The flexible display acoustic device 1 includes a flexible display driving device 2 whose overall shape is an elongated shape, and a flexible display 3 in which the flexible display driving device 2 is attached to an end portion on the short side. The flexible display driving device 2 has a rectangular tube-shaped case 4, and an electrodynamic actuator unit 8 to be described later is provided therein, and an end of the flexible display 3 is inserted into an opening 4 a of the case 4 to be internally The electrodynamic actuator unit 8 is connected. The opening 4a of the case 4 is provided with an elongated belt-like elastic material 5 made of rubber or foam material that holds the flexible display 3 and supports it.

  FIG. 2 is a partial perspective view showing the internal structure of the flexible display driving device 2 with one case cover which is a constituent member of the rod-shaped case 4 removed. The case 4 includes a mounting base 6 having a substantially bowl-like shape and a case cover 7 having a substantially J-shaped cross section provided on each side of the mounting base 6. An appropriate number of electrodynamic actuator units 8 are disposed on the substantially flat inner surface of the mounting base 6 at appropriate intervals, and a rectangular spacer block 9 is provided adjacent to the electrodynamic actuator unit 8. ing. The length of the spacer block 9 can be arbitrarily selected. The material may be a metal or a resin. The same applies to the case cover 7 and the mounting base 6. The electrodynamic actuator unit 8 and the spacer block 9 are disposed on the inner surface of the mounting base 6 and in the case cover 7.

  The electrodynamic actuator unit 8 has a cylindrical voice coil bobbin 10. The voice coil bobbin 10 has a central portion in the width direction of the case 4 and the length of the case 4 when the voice coil bobbin 10 is incorporated in the case 4. A pair of cuts 10a for supporting and fixing the flexible display is provided along the direction, and the end of the flexible display 3 is inserted into the cuts 10a, and the flexible display 3 is supported. Further, an elastic material 5 is provided on both upper sides of the end portion of the flexible display 3 supported by the notches 10a.

  FIG. 3 shows the overall configuration of the electrodynamic actuator unit 8 housed in the case 4.

  That is, the electrodynamic actuator unit 8 is provided with a yoke 11 made of a bottomed cylindrical soft magnetic material, a disk-shaped magnet 12 provided at the bottom of the yoke 11, and an upper portion of the magnet 12. The magnetic circuit comprising the disc-shaped pole piece 13 and the voice coil 10b having one end disposed in the magnetic gap between the inner peripheral surface above the outer peripheral wall of the yoke 11 and the outer peripheral surface of the pole piece 13 are described above. A voice coil bobbin 10, a cylindrical spacer 14 provided at the upper end of the outer peripheral wall of the yoke 11, and a butterfly damper 15 provided on the upper portion of the spacer 14 are provided. 10, and the voice coil bobbin 10 is supported by the butterfly damper 15 so as to be able to vibrate. Tsu is door of is configured.

  The elastic material 5 provided in the opening 4a of the case 4 is provided between both side surfaces of the flexible display 3 and the bent portion 7a having a substantially inverted U shape of the case cover 7 constituting the case 4, The flexible display 3 is sandwiched. The end of the case cover 7 opposite to the bent portion 7a is attached to the side of the mounting base 6 as described above. The end face in the length direction of the case 4 is closed by a cover.

  The outer end of the butterfly damper 15 that supports the voice coil bobbin 10 may be fixed to the spacer 14 as shown in FIGS. 3 and 4, or may be fixed to the spacer block 9 shown in FIG. . In the case of FIG. 5, the butterfly damper spacer 14 is not necessary, and the number of parts is reduced accordingly, so that the cost is reduced. Further, since it cannot be accommodated in the slim case 4, the spacer block 9 can be used for affixing the butterfly damper 15.

  In operation, Fleming's left-hand rule is applied by applying an electrical signal to the voice coil 10b placed in a magnetic flux between the yoke 11 and the pole piece 13 through the butterfly damper 15 so as to vibrate. Is generated in the voice coil bobbin 10 via the voice coil 10b, and the flexible display 3 connected to the voice coil bobbin 10 vibrates in the plane parallel direction to emit sound waves. In this case, by holding the flexible display 3 with the elastic body 5 attached to the opening 4 a of the case cover 7, it is possible to suppress abnormal noise due to lateral vibration of the voice coil 10 b and resonance of the flexible display 3.

  FIG. 6 is a plan view of the flexible display acoustic device 1 according to the embodiment of the present invention.

  Since the display 3 is flexible, the flexible display acoustic device 1 of the present invention can be freely bent as required as shown in FIG. 7 and can enjoy sound while changing the shape.

  Moreover, when carrying or accommodating, as shown in FIG. 8, it can be rounded and made compact.

  FIG. 9 shows the sound pressure frequency characteristics of the double-sided drive type flexible display 3 according to one embodiment of the present invention. Although there are some dips in the mid-high range, it is possible to obtain practically sufficient reproduced sound from low to high.

  10 and 11 show examples in which the length dimensions of the flexible display driving device 2 are different.

  For products with different thicknesses of the flexible display 3, the length of the case 4 is adjusted and the drive unit is unitized, so the number and position of the electrodynamic actuator units 8 to be installed, the spacer block 9 By appropriately selecting the number, length, etc., it is possible to adjust the driving force and the resonance state of the flexible display 3 and easily cope with it.

  That is, when the thickness of the flexible display 3 is thick, the weight increases. Therefore, as shown in FIG. 10, the case 4 is lengthened and supported and driven by the flexible display device 2 in which the number of electrodynamic actuator units 8 is increased. It ’s fine. In addition, when the thickness of the flexible display 3 is thin, the flexible display 3 may be supported and driven by the flexible display device 2 in which the case 4 is shortened as shown in FIG.

  As the flexible display 3, a display device such as an organic EL is used. This display device is configured by including an array substrate or the like on which a display unit formed by arranging organic EL elements in a matrix is formed, and by using a plastic substrate as a substrate material of the display, weight reduction can be realized, And, for example, it can be rounded into a cylindrical shape. As the display of the present invention, an organic EL or a liquid crystal that is excellent in portability and can be bent freely is used.

1 is a perspective view of a flexible display acoustic device according to an embodiment of the present invention. The fragmentary perspective view which shows the internal structure of a flexible display drive device is shown. The structural example of an electrodynamic actuator unit is shown. An example of fixing a butterfly damper of an electrodynamic actuator unit is shown. The other example of fixation of the butterfly damper of an electrodynamic actuator unit is shown. The top view of the flexible display sound apparatus concerning one Example of this invention is shown. The perspective view of an example which bent the flexible display acoustic device of the present invention is shown. An example in which the flexible display acoustic device of the present invention is compactly rolled for portable use or storage will be shown. 6 shows sound pressure frequency characteristics according to an embodiment of the present invention. The top view of the other example of the flexible display acoustic apparatus of this invention is shown. The top view of the further another example of the flexible display acoustic apparatus of this invention is shown. A conventional example is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flexible display acoustic device 2 Flexible display drive device 3 Flexible display 4 Case 4a Opening part 5 Elastic material 6 Mounting base 7 Case cover 8 Electrodynamic actuator unit 9 Spacer block 10 Voice coil bobbin 10a Cut 10b Voice coil 11 Yoke 12 Magnet 13 Pole Piece 14 Spacer 15 Butterfly damper

Claims (3)

  A flexible display (3) that is flexible and capable of displaying an image, and a flexible display drive device (2) that is attached to an end of the flexible display (3) and that vibrates the flexible display (3) to emit sound. A flexible display acoustic device comprising: The flexible display acoustic device according to claim 1,
The flexible display drive device (2) has a rectangular tube shape, and a case (4) that houses the end of the flexible display (3) from the opening (4a), and an opening of the case (4) An elastic body (5) provided in (4a) for holding the flexible display (3), and housed at an appropriate interval in the case (4), and supporting the end of the flexible display (3); And at least one electrodynamic actuator unit (8) for driving the display (3). The electrodynamic actuator unit (8) has a notch (10a) into which an end of the flexible display (3) is inserted. ) And a voice coil bobbin (10) having a voice coil (10b), and this voice coil bobbin (10) A damper (15) for rotatably supporting, flexible display acoustic apparatus characterized in that it is constituted by a magnetic circuit having a magnetic gap in which the voice coil (10b) is arranged. The flexible display acoustic device according to claim 1 or 2,
The flexible display driving device (2) is attached to both ends of the flexible display (3), respectively.

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