KR20090027831A - Display apparatus - Google Patents

Abstract

The present invention relates to a display device.

According to an embodiment of the present invention, the exciter is directly attached to the rear surface of the front panel, thereby reducing the manufacturing cost of the display device, and since the substantial whole area of the front panel can act as a vibration plate, a wider frequency band is provided by the exciter. Sound can be implemented.

Description

Display apparatus

The present invention relates to a display device.

Conventional display devices include a display module, a case surrounding the display module, and a speaker provided on one side of the case.

In detail, the conventional display device has a structure in which a speaker unit composed of a transducer and an enclosure is mounted in a case by a separate fastening member.

An object of the present invention is to compensate for the disadvantage that the speaker unit is mounted inside the display device as a separate unit, so that the overall display device standard is increased.

In addition, it is an object of the present invention to further reduce the thickness of the display device, to provide a display device that can increase the customer satisfaction.

Display device according to an embodiment of the present invention for achieving the above object, a display module; A front panel surrounding an edge of the display module; A shaking plate coupled to one side of the front panel; An exciter attached to the rear surface of the vibration plate; A plurality of bosses protruding from the rear surface of the vibration plate to support the exciter is included, and the bosses are arranged in a direction crossing the longitudinal direction of the vibration plate.

In another aspect, a display device according to an embodiment of the present invention includes a display module; A front panel surrounding an edge of the display module; An exciter attached to a rear surface of the front panel; A plurality of bosses protruding from the rear surface of the front panel to support the exciter are included, and the bosses are arranged in a direction crossing the line extending in the left and right directions of the front panel.

According to an embodiment of the present invention, the exciter is directly attached to the rear surface of the front panel, thereby reducing the manufacturing cost of the display device, and since the substantial whole area of the front panel can act as a vibration plate, a wider frequency band is provided by the exciter. Sound can be implemented.

In addition, since the thickness of the display device is visually reduced, consumer satisfaction is enhanced.

In addition, the part where the speaker system is placed can be the same as the tweeter in the high range and the woofer in the low range, so that an advantage of enjoying a more realistic sound can be obtained.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a display device according to an embodiment of the present invention.

Referring to FIG. 1, a display device 1 according to an embodiment of the present invention includes a display module 6, a front panel 2 protecting a front edge portion of the display module 6, and a front panel ( A vibration plate 3 provided at the lower edge of 2) and a plurality of excitation devices 4 fastened to the rear surface of the vibration plate 3 are included.

In detail, a seating portion 21 for mounting the shaking plate 3 on the lower end of the front panel 2 is formed to be stepped to a predetermined depth. In addition, an exciter hole 22 through which the exciter 4 penetrates is formed in the seating part 21. In addition, a boss 34 for fixing the exciter 4 is extended to the rear surface of the vibration plate 3 (see FIG. 2). In addition, the vibration damping pad 7 may be mounted at a portion where the front panel 2 and the back cover 8 come into contact with each other to remove contact noise.

2 is a view showing a state in which the exciter is mounted on the back of the shaking plate according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the exciter.

2 and 3, the excitation device 4 is fixed to the vibration plate 3, and the excitation device 4 is firmly fixed to the rear surface of the vibration plate 3 by a screw fixing method. do.

In detail, the boss 34 protrudes to the rear of the vibration plate 3, and the protrusion 41 protrudes from the exciter 4 so that the boss 34 can be aligned with the boss 34. Then, the screw is inserted in the state in which the protrusion 41 and the boss 34 are aligned with each other. In addition, the vibration generating unit of the exciter 4 is fixed in such a manner as to be in direct contact with the rear of the vibration plate 3 so that the vibration generated in the exciter 4 is completely transmitted to the vibration plate 3. Be sure to Furthermore, no contact noise may be generated between the exciter 4 and the vibration plate 3.

In addition, in order to prevent the boss 34 from shielding the acoustic vibration transmitted from the exciter 4, the boss 34 may be installed to avoid the moving direction of the vibration plate 3. In other words, the boss 34 may be provided at the upper end and the lower end of the vibration plate 3 so as to intersect the longitudinal direction of the vibration plate 3. In this case, the attenuation of the amount of vibration generated by the vibration plate 3 can be obtained.

On the other hand, the exciter 4 is known to have a problem that the mid- or high-band sound can be sufficiently reproduced in the audible frequency band of 20 to 20,000 Hz, but the low-frequency audible frequency cannot be sufficiently reproduced. In order to improve such a problem, it is common to provide a separate woofer in the display device.

The exciter 110 further includes a yoke 41 forming an external appearance, a magnet 42 and 43 provided inside the yoke 41 to form a magnetic flux, and the magnets 42 and 43. Plate 44 to be fitted to the bobbin, a bobbin 48 fitted to the outside of the magnets 42 and 43 and oscillating back and forth in the drawing, and a voice coil surrounded by an outer circumferential surface of the bobbin 48 and having a current flowing therein ( 45, a coupler 49 coupled to an end of the bobbin 49, a ring 46 coupled to an opening surface of the yoke 41, and one side connected to the ring 46 and the other side of the A damper 47 is connected to the bobbin 48 and performs a center holding function of the voice coil 45.

More specifically, the protruding portion 411 protrudes from the outer circumferential surface of the ring 46 so that the screw is inserted through, and the inserted screw is inserted into the boss 34 protruding from the rear surface of the vibration plate 3.

In addition, the yoke 41 has a shape that is recessed to a predetermined depth, and the magnets 42 and 43 are seated on the recessed portion, thereby performing the function of positioning the magnets 42 and 43. When the current flows through the voice coil 45, the bobbin 48 vibrates in the front-back direction according to the left-hand rule of Fleming.

In other words, each time the direction of the magnetic flux is fixed by the magnets 42 and 43, the bobbin 48 oscillates in the front-rear direction whenever the direction of the current flowing through the voice coil 45 changes by 180 degrees. Done. Applying this to Fleming's left hand law, the thumb indicates the direction of movement of the bobbin 48, the index finger indicates the direction of the magnetic flux, and the middle finger indicates the direction of the current. Here, when the direction of the current changes by 180 degrees in the fixed magnetic flux direction, the bobbin 48 oscillates in the front-rear direction.

In this case, the damper 47 performs a center holding function so that the voice coil 45 can operate correctly as well as a damping function. In addition, since the configuration and operation of the exciter are the same as those of a general speaker structure, a detailed description thereof will be omitted.

 On the other hand, the end of the bobbin 48 is covered with a coupler 49, the coupler 49 is made of a band shape having a predetermined width. In addition, the front surface of the coupler 49 is completely in contact with the rear surface of the vibration plate (3). Thus, the combination of the voice coil 45 and the bobbin 48 is vibrated in the front and rear direction in the acoustic frequency band. At this time, the yoke 41 is fixed to the rear surface of the vibration plate 3 by screwing as shown in FIG. When the bobbin 48 vibrates in this state, the vibration is transmitted to the vibration plate 3 and simultaneously propagates to the front panel 2. Thus, the entire front panel 2 performs the function of the shaking plate.

4 is a cross-sectional view taken along the line II ′ of FIG. 1, and FIG. 5 is a cross-sectional view taken along the line II-II ′ of FIG. 1.

4 and 5, the shaking plate 3 is strongly attached to the seating portion 21 by an adhesive member B. Referring to FIGS. As a kind of said adhesive member B, a liquid adhesive or a double-sided tape etc. are applicable. Unlike the embodiment shown in FIG. 2, a separate vibration damping pad does not intervene, and abnormal noise due to friction between the vibration plate 3 and the seating portion 21 is caused by the strong adhesive force of the adhesive member B. Can prevent this from happening.

Here, of course, at least one exciter 4 mounted on the rear surface of the shaking plate 3 may be mounted at both edges.

In addition, in the present embodiment, a separate vibration plate 3 is attached to the lower front surface of the front panel 2, and the exciter 4 penetrates through the front panel 2 to allow the vibration plate 3. Although it is proposed to be fixed to, it is also possible that the exciter (4) is directly attached to the bottom rear surface of the front panel (2).

In other words, the coupler 49 may be directly attached to the rear surface of the front panel 2, and a boss may protrude from the rear surface of the front panel 2 to fix the exciter 4.

6 is a rear view showing a state in which the exciter is mounted on the back of the shaking plate.

Referring to FIG. 6, the protrusion 411 of the exciter 4 is attached in a direction crossing the longitudinal direction of the vibration plate 4.

In other words, two bosses 34 for fixing the exciter 4 are formed on the same line, and the line L2 passing through the boss 34 extends in the longitudinal direction of the vibration plate 3. L1, that is, it is formed to deviate from the horizontal line.

As such, the boss 34 is formed to intersect the longitudinal direction of the vibration plate 3, thereby minimizing the phenomenon that the wave propagated from the exciter 4 is canceled by the boss 34.

In detail, the wavelength of the bass region of the wave propagated from the exciter 4 is easily canceled when hitting an obstacle as compared with the wavelength of the treble region. And since the length of the said vibration board 3 is short in the width direction, the sound of the high pitched region with short wavelength is propagated in the width direction.

For this reason, if the boss 34 is installed to avoid the longitudinal direction of the vibration plate 3, the phenomenon that the frequency of the bass region is canceled is reduced, so that the bass reproduction band is widened.

Therefore, the boss 34 is arranged in the width direction of the shaking plate 3 can obtain the maximum sound effect.

In addition, when the distance between the protrusions provided at the edge of the exciter 4 is greater than the width of the vibration plate 3, the boss 34 may be formed to have a predetermined angle from the vertical line.

7 is a graph showing the acoustic frequency characteristics according to the mounting position of the exciter according to the embodiment of the present invention.

Referring to FIG. 7, the diagram S1 is an acoustic frequency characteristic curve when the boss supporting the exciter is disposed in parallel with the longitudinal direction of the shaking plate, and the diagram S2 is arranged in the direction in which the boss crosses the longitudinal direction of the shaking plate. The acoustic frequency characteristic curve of the case.

In detail, it can be seen that in the interval between the acoustic frequencies 1 KHz and 10 KHz, the frequencies F1 and F3 reproduced in the case of the diagram S2 based on the specific sound pressure are lower than the frequencies F2 and F4 reproduced in the case of the diagram S1. This means that the boss 34 is arranged to be offset from the longitudinal direction of the shake plate, so that the sound of the long bass region having a long wavelength is transmitted without canceling out.

From the graph presented, it can be seen that the propagation length of the sound in the low range, that is, the low frequency sound, varies depending on the position of attachment of the boss 34 supporting the exciter 4.

That is, the boss 34 is installed in a direction that does not interfere with the advancing direction of the acoustic frequency, so that sound reproduction in the low range is possible and high quality sound effects can be obtained.

1 is an exploded perspective view of a display device according to an embodiment of the present invention.

2 is a view showing a state in which the exciter is mounted on the back of the shaking plate according to an embodiment of the present invention.

3 is a sectional view of the exciter;

4 is a cross-sectional view taken along the line II ′ of FIG. 1.

5 is a cross-sectional view taken along the line II-II 'of FIG.

Figure 6 is a rear view showing a state in which the exciter is mounted on the back of the shaking plate.

7 is a graph showing the acoustic frequency characteristics according to the mounting position of the exciter according to the embodiment of the present invention.

Claims (9)

Display module; A front panel surrounding an edge of the display module; A shaking plate coupled to one side of the front panel; An exciter attached to the rear surface of the vibration plate; A plurality of bosses protruding from the rear surface of the shaking plate to support the exciter, And the boss is arranged in a direction crossing the longitudinal direction of the vibration plate. The method of claim 1, And the boss is disposed in a direction perpendicular to the longitudinal direction of the vibration plate. The method of claim 1, And the vibrating plate is in close contact with the front panel by an adhesive member. The method of claim 1, The line passing through the boss is a display device, characterized in that the angle formed by the line extending in the longitudinal direction of the shaking plate is less than 90 degrees. The method of claim 1, In the exciter, Bobbin, A voice coil wound around the bobbin, A magnet provided inside the bobbin, Yoke supporting the magnet and A coupler is included on the end of the bobbin, The coupler is in close contact with the back of the vibration plate, characterized in that the display device. The method of claim 5, wherein And a double-sided tape interposed between the coupler and the shaking plate. Display module; A front panel surrounding an edge of the display module; An exciter attached to a rear surface of the front panel; A plurality of bosses protruding from the rear surface of the front panel to support the exciter, The boss is arranged in a direction crossing the line extending in the left and right directions of the front panel. The method of claim 7, wherein In the exciter, Bobbin, A voice coil wound around the bobbin, A magnet provided inside the bobbin, Yoke supporting the magnet and A coupler is included on the end of the bobbin, And the coupler is in direct contact with the rear surface of the front panel. The method of claim 8, The coupler is in close contact with the back of the front panel.

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