JP2000261876A - Video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust a speaker in an optimum listening attitude by projecting the speaker from a cabinet when in use while housing the speaker in the cabinet when not in use. SOLUTION: A speaker container 14 with a volume in which a flat speaker 13 can be housed is formed to a desired front side of a cabinet 12 containing a video display section 11 in the video display device 10, and the flat speaker 13 is supported by a hinge 15 in a rocking enable way close to the speaker container 14. Then the flat speaker 13 is set to an attitude where it is housed in the speaker container 14 and another attitude where the flat speaker 13 is projected to a side face of the cabinet 12 from the speaker container 14 and a sound radiation face of the flat speaker 13 is directed in an optional direction toward a listener.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display apparatus having a speaker, and more particularly, to a speaker which is housed in a cabinet when not in use and which is protruded from the cabinet when in use to obtain an optimum listening posture. The present invention relates to a video display device with a speaker that can be adjusted.

[0002]

2. Description of the Related Art CRTs including television receivers
In a video display device including a computer, a plasma display, a liquid crystal display, and the like, with the development of multimedia, not only an image information processing system but also an audio system for processing audio information has been incorporated. Along with this, the audio playback speaker of the audio system is also one of the important components for the multimedia video display device. Conventionally, as a method of adding a speaker used for such a video display device to the video display device, a built-in type built in a cabinet of the video display device or an external type mounted externally to the cabinet Or, there is an independent type that is separated from the cabinet.

[0003]

However, in the above-mentioned speaker-incorporating type, since it is necessary to secure a space for accommodating the speakers in the cabinet, the cabinet becomes large and the image display device itself becomes large. I will. In addition, since it is a built-in type, the radiation direction of the sound of the speaker is fixed, and as a result, unless the image display device itself is moved or the listener moves, the radiation direction of the sound of the speaker is heard by the listener. There is a problem that it cannot be changed according to the position.

In addition, in the above-mentioned external speaker system, a speaker box for accommodating the speaker is required in addition to the speaker, and the speaker box itself is directly fixed to the left and right sides of the cabinet. In addition to an increase in the size and weight of the whole, a large installation space is required, and furthermore, similarly to the above-described built-in system, there is a problem that the radiation direction of the sound from the speaker cannot be changed according to the listening position of the listener.

In the speaker independent method, since the speaker can be separated from the video display device, the direction of radiation of the sound from the speaker can be changed according to the listening position of the listener. However, since the speaker has a structure mounted in a speaker box independent of the cabinet, an installation space for the speaker is required in addition to an installation space for the video display device, and the installation space for the entire video display device is increased. In addition, there is a problem that handling of the speaker becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a speaker which can be stored in a cabinet when not in use, and which has an optimum listening posture by projecting the speaker from the cabinet when in use. It is an object of the present invention to provide a video display device which can be adjusted to a desired speed.

[0007]

According to the present invention, there is provided a video display apparatus having a video display unit and a cabinet accommodating the video display unit, comprising: a speaker for sound reproduction; A speaker housing portion having a capacity capable of housing the speaker is formed at a desired surface location of the speaker, and the posture in which the speaker is housed in the speaker housing portion and the speaker protrudes from the speaker housing portion into the cabinet so that the sound of the speaker A support means for swingably supporting the speaker to the cabinet so that the radiation surface of the speaker can be directed to an arbitrary direction with respect to a listener is provided.

According to the present invention, when the image display device is transported or not used, the speaker supported by the support means is housed in the speaker housing of the cabinet, thereby providing a speaker-equipped image display set with few protruding portions. I can do it. In use, the speaker supported by the support means is projected out of the cabinet from the speaker housing portion, and the diaphragm, which is the radiation side of the sound of the speaker, can be adjusted to the optimum listening posture by the support means.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a video display device with a speaker according to the present invention. FIG. 1 is a schematic configuration diagram showing an embodiment of a video display device with a speaker according to the present invention, and FIG. 2 is a cross-sectional plan view showing one embodiment of a flat speaker applied to the video display device of the present invention. . In FIG. 1, reference numeral 10 denotes a video display device with speakers, such as a television receiver. The video display device 10 includes a video display unit 11 composed of a CRT, a plasma display, a liquid crystal display, or the like, and a video display unit 11 A cabinet 12 that houses the cabinet 11 is provided. Reference numeral 13 denotes a speaker for sound reproduction which is mounted so as to be housed in the left and right side portions of the cabinet 12 which is near the front of the video display unit 11.

The loudspeaker 13 is composed of a rectangular planar speaker. And this flat speaker 1
In order to store the speaker 3 in the side of the cabinet 12, a speaker housing 14 having a depth similar to the contour of the flat speaker 13 and corresponding to the thickness of the flat speaker 13 is provided in the side of the cabinet 12. Are formed in a concave cross section. One end of the flat speaker 13 in the longitudinal direction is hinged (supporting means) 15 to be supported by the cabinet 12 so as to be swingable in the vicinity of the speaker housing 14.
By providing this support structure, the planar speaker 13
Is set in a posture in which the flat speaker 13 is protruded from the speaker housing 14 into the cabinet 12 and a sound radiation surface of the flat speaker 13 is directed to an arbitrary direction with respect to a listener. I can do it.

As shown in FIG. 2, the flat speaker 13 includes a cover member 131 having an open front surface, a diaphragm 132 such as foamed polystyrene disposed in an opening of the cover member 131, and A drive unit 133 supported by the cover member 131 and radiating sound by vibrating the diaphragm 132 according to an audio signal. A plurality of the drive units 133 are provided at intermediate positions in the short direction of the vibration plate 132 and separated by a predetermined distance in the long direction of the vibration plate 132.

As shown in FIG. 2, the drive unit 133 is provided with a bobbin 21 having one end fixed to a diaphragm 132.
A voice coil 22 wound around the other end of the bobbin 21; and a voice coil 2 supported by a cover member 132.
A magnetic circuit 23 that generates a magnetic field in a direction orthogonal to the current flowing through the magnetic circuit 2, and is joined between the diaphragm 132 and the magnetic circuit 23 to support the diaphragm 132 so as to be able to freely vibrate and to connect the voice coil 22 to And a damper (holding member) 24 held in the magnetic gap. further,
The magnetic circuit 23, as shown in FIG.
32 is a disk-shaped yoke 2 fixed by screws 231 and the like.
32, a center pole 233 projecting from the center of the yoke 232, a ring-shaped magnet 234 fixed to the yoke 232 concentrically with the center pole 233, and fixed to the magnet 234 concentrically with the center pole 233. And a plate 235 having a donut shape. FIG. 3 shows a planar speaker 13 for each frequency.
Is shown.

In the image display apparatus of the present embodiment configured as described above, when the image display apparatus 10 is carried or not used, the flat speaker 13 supported by the hinge 15 is moved to the speaker housing 14 of the cabinet 12. It is stored by pushing it inside. This makes it possible to provide a video display device with a speaker having almost no protruding portion. That is, by making the speaker 13 flat, the speaker housing 14 formed on the side surface of the cabinet 12 also
Since a flat plate corresponding to the shape of 3 may be used, a space for accommodating the speaker in the cabinet in the direction of the listener as in the related art is not required, and the cabinet 12 can be reduced in size accordingly. In addition, the entire image display device can be reduced in size, and a large installation space for the image display device can be reduced.

In using the video display device,
Flat speaker 1 housed in speaker housing 14
The flat speaker 13 is made to protrude out of the cabinet 12 from the speaker accommodating portion 14 by rotating the hinge 3 in the horizontal direction indicated by the arrow in FIG. Thereafter, the horizontal angle of the flat speaker 13 is adjusted so that the diaphragm 132 of the flat speaker 13 faces the listener. Thereby, the listener can hear the sound radiated from the diaphragm 132 of the flat speaker 13 in an optimal state. In the present embodiment, the speaker 13
Is a planar speaker, and the periphery of the diaphragm 132 is also freely vibrated by the drive unit 133, so that wide band reproduction is possible and a sufficient volume is obtained with a relatively small magnetic circuit. Can be. Further, as shown in FIG. 3, the flat speaker 13 can obtain good directivity in all directions, so that even when a plurality of viewers watch the video display device, they are almost equal to each other. , And sound with good frequency characteristics can be heard.

Next, another embodiment of the flat speaker according to the present invention will be described with reference to FIGS.
FIG. 4 is a front view of a flat speaker according to another embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along line AA of FIG.
FIG. 6 is a perspective view of a main part when a flat speaker according to another embodiment of the present invention is mounted on a video display device.
4 and 5, a flat speaker 41 includes a protective frame 42 that forms the outline of the flat speaker,
A diaphragm 43 made of foamed polystyrene or the like, which is disposed on the inner side of the diaphragm 2;
2, a cover member 44 supported by
And a plurality of drive units 45 for radiating sound by vibrating the diaphragm 43 in accordance with an audio signal. Further, a mass member 46 for changing the performance and sound quality of the speaker is provided along the entire length of the rear surface edge of the diaphragm 43.

The image display unit 11 of the image display device 10
A speaker housing 121 for housing the flat speaker 41 is provided at a side of the cabinet 12 near the front of the speaker 12.
Are formed. The speaker housing 121 has a depth similar to the contour shape of the flat speaker 41 and corresponding to the thickness of the flat speaker 41. One end of the flat speaker 13 in the longitudinal direction is a hinge (support means).
47 swingably supported by the cabinet 12. By providing this support structure, the attitude in which the planar speaker 41 is accommodated in the speaker accommodating portion 121 and the sound radiating surface of the planar speaker 41 projecting from the speaker accommodating portion 121 to the cabinet 12 are the listeners. Can be set to postures that can be directed in any directions.

Similarly to the flat speaker 13, the drive unit 45 includes a bobbin 451 having one end fixed to the diaphragm 43, a voice coil 452 wound around the outer periphery of the other end of the bobbin 451, and a cover. A magnetic circuit 453 which is supported by the member 44 and generates a magnetic field in a direction orthogonal to the current flowing through the voice coil 452; and is joined between the diaphragm 43 and the magnetic circuit 453 to support the diaphragm 43 so that it can freely vibrate, and And a damper (holding member) 454 for holding the coil 452 in the magnetic gap of the magnetic circuit 453.

The video display device with the loudspeaker configured as described above can provide the same functions and effects as those shown in FIG.

In the above-described embodiment, the case where the flat speaker 13 or 41 is swingably supported on the cabinet 12 by the support means including a hinge has been described. The support means may be constituted by a universal joint such as the above. Further, in the above-described embodiment, the case where the flat speaker 13 or 41 is provided on the side of the cabinet 12 closer to the front of the video display unit 11 has been described.
2 may be provided on the rear surface portion or the rear side surface, or on the front upper surface of the cabinet 12. Further, the driving unit for vibrating the diaphragm 132 or 43 of the flat speaker 12 or 41 is not limited to the one constituted by the voice coil and the magnetic circuit, but the vibrator made of the piezoelectric element which undergoes electrostrictive deformation according to the audio signal It may be composed of Further, the speaker used in the present invention is not limited to a flat speaker, and may be a cone speaker.

[0020]

As described above, according to the present invention, when the image display device is carried or not used, the speaker supported by the support means is housed in the speaker housing portion of the cabinet, so that most of the protruding portion is provided. It is possible to provide a video display set with a speaker that does not require a large cabinet. In use, the speaker supported by the support means is projected out of the cabinet from the speaker housing portion, and the diaphragm, which is the radiation side of the sound of the speaker, can be adjusted to the optimum listening posture by the support means. Further, according to the present invention, by using a planar speaker, the speaker can be easily stored in a storage portion formed on the outer surface of the cabinet without increasing the size of the cabinet, and the directivity is omnidirectional. This has the effect of providing a video display set with a speaker that is good and capable of wideband reproduction and downsizing of the magnetic circuit.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a video display device with a speaker according to the present invention.

FIG. 2 is a cross-sectional plan view showing an embodiment of a flat speaker applied to a video display device according to the present invention.

FIG. 3 is a directional characteristic diagram of the flat speaker according to the embodiment of the present invention.

FIG. 4 is a front view showing another embodiment of the flat speaker applied to the video display device according to the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a perspective view of a main part when a flat speaker according to another embodiment of the present invention is mounted on a video display device.

[Explanation of symbols]

10 ... image display device, 11 ... image display unit, 12 ...
Cabinet, 13, 41 ... Planar speaker, 14,
121: Speaker storage section, 15, 47: Hinge (support means), 131, 44: Cover member, 132, 43 ...
... Diaphragm, 133, 45 ... Driving unit, 21, 45
1 ... bobbin, 22, 452 ... voice coil, 23,
453: magnetic circuit, 24, 454: damper (holding member), 42: protective frame, 46: mass member.

Claims (10)

[Claims] 1. A video display device comprising a video display unit and a cabinet for housing the video display unit, comprising: a speaker for sound reproduction; and a speaker housing unit having a volume capable of housing the speaker at a desired surface portion of the cabinet. A posture in which the speaker is housed in the speaker housing, and a posture in which the speaker projects from the speaker housing into the cabinet so that the sound radiation surface of the speaker can be arbitrarily directed to a listener. An image display device, further comprising: a support unit for swingably supporting the speaker in the cabinet between the speakers. 2. The video display device according to claim 1, wherein the portion where the speaker housing is formed is a side portion of the cabinet near a front surface of the video display portion or a rear surface of the cabinet. 3. The image display device according to claim 1, wherein said support means is a hinge. 4. The image display device according to claim 1, wherein said support means is a universal joint. 5. The image display device according to claim 1, wherein the speaker is a flat speaker. 6. The flat speaker includes a cover member having a front surface opened, a diaphragm disposed at an opening of the cover member, and a diaphragm supported by the cover member and vibrating the diaphragm according to an audio signal. 6. The image display device according to claim 5, comprising at least one drive unit for radiating sound. 7. The flat speaker includes a protection frame forming an outer shell of the flat speaker, a diaphragm disposed inside the protection frame, and a support positioned on the rear of the diaphragm and supported by the protection frame. 6. The image according to claim 5, further comprising: a cover member provided and at least one drive unit supported by the cover member and oscillating the diaphragm according to an audio signal to radiate sound. Display device. 8. The driving unit includes: a voice coil fixed to the diaphragm; a magnetic circuit supported by the cover member and configured to generate a magnetic field in a direction orthogonal to a current flowing through the voice coil; The image display device according to claim 6, further comprising: a holding member that holds the magnetic head in a magnetic gap of the magnetic circuit. 9. The video display device according to claim 6, wherein the drive unit is configured by a vibrator made of a piezoelectric element that undergoes electrostrictive deformation according to an audio signal. 10. The video display device according to claim 1, wherein the speaker is swung in a horizontal direction.