KR101780297B1 - Display device for generating sound by panel vibration type - Google Patents

Abstract

This embodiment relates to a display device in which sound is generated by directly vibrating a display panel, and includes a display panel on which an image is displayed, a display panel fixed to the support structure of the display panel, And an acoustically generated actuator. By using this embodiment, it is possible to improve the sound localization feeling by matching the proceeding direction of the sound with the video output direction, and to improve the acoustic output characteristic in the wide band, and it is necessary to arrange a separate speaker in the display device or the setting device It is possible to easily design the mechanism of the setting apparatus and to reduce the thickness of the display apparatus or the setting apparatus.

Description

TECHNICAL FIELD [0001] The present invention relates to a panel oscillation type sound generation display device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device in which sound is generated by directly vibrating a display panel.

As portable electronic devices such as mobile communication terminals and notebook computers are developed, there is an increasing demand for flat panel display devices applicable thereto.

Examples of the flat panel display include a liquid crystal display device, a plasma display panel, a field emission display device, a light emitting diode display device, an organic light emitting diode (Organic Light Emitting Diode Display Device) have been studied.

Among these display devices, a liquid crystal display (LCD) includes an array substrate including a thin film transistor, an upper substrate provided with a color filter and / or a black matrix, and a liquid crystal material layer formed therebetween, The alignment of the liquid crystal layer is adjusted according to an electric field applied between both electrodes of the region, and the transmittance of light is controlled thereby to display an image.

The display panel of such a liquid crystal display device is defined by a non-display area (NA), which is a peripheral area of the display area AA, and a display area (AA) A first substrate, which is an array substrate in which a thin film transistor or the like is formed and in which a pixel region is defined, and a second substrate, which is an upper substrate on which a black matrix and / or a color filter layer are formed.

The array substrate or the first substrate on which the thin film transistors are formed further includes a plurality of gate lines GL extending in a first direction and a plurality of data lines DL extending in a second direction perpendicular to the first direction , And one pixel region (Pixel P) is defined by the respective gate lines and data lines. In one pixel region P, at least one thin film transistor is formed, and the gate or source electrode of each thin film transistor may be connected to a gate line and a data line, respectively.

Of these flat panel display devices, a liquid crystal display device is an element which does not have a self light emitting element, and therefore, a separate light source is required. Accordingly, a backlight unit having a light source such as an LED is provided on the back surface, and light is irradiated toward the front surface of the liquid crystal panel, thereby realizing an image that can be discriminated.

On the other hand, an organic light emitting diode (OLED) display device that has been widely used as a display device has an advantage of high response speed, high luminous efficiency, high brightness and viewing angle by using an organic light emitting diode (OLED)

In the OLED display device, subpixels including organic light emitting diodes are arranged in a matrix, and the brightness of subpixels selected by the scan signals is controlled according to data gradation. , Low power consumption, high response speed, high luminous efficiency, high luminance and wide viewing angle.

On the other hand, there is a set device of the finished product concept including such a display device. Examples of such a set device may be a TV, a computer monitor, a billboard, and the like.

Such a display device or set device includes an audio output device such as a speaker for generating and outputting sound related to the displayed image.

In general, a manufacturer of a display device such as a liquid crystal display device or an organic light emitting diode display device produces only a display panel or a display device, assembles a speaker to a display device completed by a separate manufacturer producing a speaker, And a set device in which sound is output.

1 is a schematic plan view of a speaker included in a conventional display device.

As shown in Fig. 1, in the conventional display apparatus 1 or the setting apparatus, the loudspeaker 2 is provided at the rear or lower end of the display panel.

In this case, since the proceeding direction of the sound generated through the speaker 2 is the rear side of the display panel rather than the front side of the display panel on which the image is displayed or the lower side of the display panel, There is a problem that it interferes with the viewer's immersion.

In addition, when the sound generated through the speaker 2 travels to the rear of the display panel or to the bottom of the display panel, sound quality is deteriorated due to interference with sounds reflected from the wall or the floor.

In addition, the speaker included in the conventional display device has a problem that the direction of the generated sound is directed to the direction other than the observer direction of the display device, so that the sense of localization of the sound is lowered due to the diffraction phenomenon of sound, There is a problem that the design of the set device and the spatial arrangement are limited.

Accordingly, there is a growing need for a technique that improves the sound quality of the sound output from the display device and does not hinder the viewer's immersion.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device capable of generating a panel vibrating sound by directly vibrating a display panel constituting a display device to generate sound.

Another object of the present invention is to provide a display device including a panel vibration type sound generating device, wherein a constant air gap is formed between the display panel and the sound generating actuator, and the actuator support hole is formed in the support structure of the display device, And to provide a display device capable of reducing the thickness while having an acoustic generating performance.

It is still another object of the present invention to provide an acoustic generating baffle including an adhesive member (double-faced tape portion) adhered between a bottom surface of a display panel and a top surface of a supporting structure of a display device and a sealing portion further disposed on the outer surface of the adhesive member, And to provide a display device capable of improving the display quality.

It is still another object of the present invention to provide a method of manufacturing a display panel that is capable of preventing interference and noise between a source PCB (S-PCB) and a supporting structure for driving a display panel, And at least one buffer member disposed between the rear surface of the display panel and the inner surface of the support structure.

It is a further object of the present invention to provide a sound generating actuator and a set PCB of the present invention by disposing the sound generating actuator at a first position of the support structure of the display device and arranging the set PCB of the set device at a second position different from the first position And to provide a display device capable of avoiding interference.

Another object of the present invention is to provide a display device capable of preventing deformation of the supporting structure due to different vibration characteristics of two or more sound generating actuators by arranging reinforcing members inside the supporting structure of the display device when two or more acoustic generating actuators are used Device.

In order to achieve the above object, the display device according to the present embodiment includes a display panel for displaying an image, and an acoustic-generating actuator arranged to be in contact with one surface of the display panel and generating sound by vibrating the display panel Be able to

A support structure such as a cover bottom that covers and supports at least the rear surface of the display panel, wherein the sound generating actuator can be inserted and fixed in a support hole formed in the cover bottom.

The sound generating actuator includes a lower plate inserted into the support hole, a magnet disposed on the lower plate, a center pole disposed at the center of the lower plate, a bobbin disposed to surround the center pole, , And a coil wound around the bobbin.

On the other hand, the lower plate constituting the sound generating actuator further includes an outwardly extending extension, the extension of which can be fixed to the bottom of the cover bottom via bolts, femnuts, adhesive members or the like.

An air gap space is formed between the display panel and the support member and a baffle portion including an adhesive member and a sealing portion disposed between the upper surface of the support member and the lower surface of the display panel at the edge of the air gap space.

The supporting member includes a cover bottom supporting the display panel and a middle cabinet supporting the display panel edge, wherein the middle cabinet includes a first area including a source PCB and a second area including a sound generating actuator An area dividing member may be included.

A first buffer member may be disposed on the upper surface of the cover bottom opposite to the source PCB disposed on the rear side of the display panel, and a first buffer member spaced apart from the bottom surface of the display panel by a predetermined distance.

The cover bottom may be provided with a second buffer member which contacts the upper surface of the cover bottom and the bottom surface of the display panel while separating the first area covering the source PCB and the second area covering the sound generating actuator.

The acoustic generating actuator includes two or more actuators arranged symmetrically and having mutually different vibration characteristics, and the cover bottom may further include a reinforcing member passing through adjacent positions of the at least two actuators.

According to the embodiment of the present invention to be described below, it is possible to provide a display device including a panel vibrating type sound generating device that directly vibrates the display panel to generate sound, thereby making it unnecessary to arrange a separate speaker in the display device or the setting device There is no effect.

Further, since the traveling direction of the sound coincides with the video output direction, the sound localization or sound output characteristic can be improved, the mechanism of the setting device can be easily designed, and the effect of reducing the thickness of the display device or the setting device have.

Further, by forming a constant air gap between the display panel and the sound generating actuator and fixing the sound generating actuator to the support hole formed in the supporting structure of the display device, it is possible to reduce the thickness of the display device .

Further, by forming the baffle portion including the adhesive member (double-faced tape portion) adhered between the bottom surface of the display panel and the upper surface of the supporting structure of the display device and the sealing portion further disposed on the outer surface of the adhesive member, the acoustic output characteristic can be improved.

In addition, by arranging at least one cushioning member disposed between the support structure for fixing / supporting the sound generating actuator and the source PCB of the display panel or between the back surface of the display panel near the source PCB and the inner surface of the support structure, It is possible to prevent interference and noise between the source PCB (S-PCB) for driving and the supporting structure of the display device.

In addition, by disposing the sound generating actuator and the set PCB of the setting apparatus at different positions, interference between the sound generating actuator and the set PCB can be avoided, and the acoustic characteristics can be improved.

Further, when two or more acoustically generating actuators are used, by arranging the reinforcing members inside the supporting structure of the display device, deformation of the supporting structure due to different vibration characteristics of the two or more acoustic generating actuators, or acoustic distortion due to vibration of the supporting structure There is an effect that can be prevented.

1 is a schematic plan view of a speaker included in a conventional display device.
Fig. 2 is a schematic view of a display device including a panel-type vibrating type acoustical generator according to an embodiment of the present invention, wherein Fig. 2A is a plan view and Fig. 2B is a sectional view.
3 is a cross-sectional view of two types of acoustically-generated actuators used in an embodiment of the present invention.
4 shows a state in which the sound generating actuator according to the embodiment of the present invention vibrates the display panel to generate sound.
5 shows an example of the coupling state between the sound generating actuator according to the embodiment of the present invention and the cover bottom, which is the supporting structure of the display apparatus.
6 shows another embodiment of the coupling structure of the sound generating actuator and the cover bottom.
Fig. 7 shows an example of a baffle portion formed between a display panel and a middle cabinet, which is one of the supporting structures of the display panel, for forming an air gap for sound transfer between the display panel and the cover bottom as a diaphragm.
8 shows a structure in which the adhesive member and the sealing portion are directly seated on the cover bottom, as another embodiment of the baffle portion.
Fig. 9 shows the positional relationship between the source PCB for driving the display panel and the set PCB driving set PCB disposed on the rear side of the display device.
Fig. 10 shows an embodiment including an area dividing member further formed in the middle cabinet, and a cable through hole for passing a connecting cable (FFC) formed in the cover bottom.
11 is a view for explaining a layout relation between the source PCB for driving the display panel and the cover bottom, and a noise generation problem caused thereby.
Fig. 12 shows an embodiment including a buffer member capable of preventing interference and noise between the source PCB and the cover bottom according to Fig.
FIG. 13 is a graph showing the noise reduction effect when the buffer member according to the embodiment of FIG. 12 is used.
FIG. 14 is a diagram showing the arrangement relationship between the sound generating actuator and the set PCB in the display device according to the embodiment of the present invention.
15 is a view showing a case where two or more actuators are symmetrically provided in a display device and a twist phenomenon of a cover bottom which may occur due to a difference in vibration amount in this case.
Fig. 16 shows a structure in which a reinforcement member is disposed inside the cover bottom to prevent acoustic distortion due to twist of the cover bottom or vibration of the cover bottom according to Fig.
Fig. 17 shows specific arrangements of the reinforcing members of the cover bottom.
Figure 18 shows an embodiment further comprising an acoustic compensation member disposed to maintain acoustic output characteristics when the acoustic generating actuator is moved up and down for design reasons.
19 is a graph showing acoustic output characteristics in a case where the panel vibration type sound generating apparatus according to the present embodiment is used in comparison with a conventional general speaker.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

Fig. 2 is a schematic view of a display device including the panel-type vibrating type acoustical generator according to the present embodiment, wherein Fig. 2A is a plan view and Fig. 2B is a sectional view.

2, the display device according to the present embodiment includes a display panel 100 for displaying an image, an acoustical actuator 200 for generating sound by vibrating the display panel in contact with one surface of the display panel, .

4, the sound generating actuator 200 includes a magnet, a plate for supporting the magnet, a center pole protruding from a central region of the plate, And a tip end of the bobbin is arranged to contact one surface of the display panel.

Further, as shown in FIG. 2B, the display device may include a support structure for supporting at least one of the rear surface or the side surface of the display panel, and the plate of the sound generating actuator is fixed to the support structure.

The support structure further includes a middle cabinet (500) that includes a cover bottom (300) disposed on the rear surface of the display panel and surrounds the side surface of the display panel and is coupled to the cover bottom and receives and supports one side edge of the display panel can do.

The cover bottom constituting the support structure may be a plate-like member made of metal or plastic extending over the entire rear surface of the display device.

The cover bottom 300 in the present specification is not limited to the term, but may be a plate bottom, a back cover, a base frame, a metal frame, A chassis, a chassis base, an m-chassis, or the like, and includes a frame or plate-like structure of any type disposed on the rear base of the display device as a support for supporting the display panel It should be understood.

The term "display device" used herein is intended to encompass display devices such as a liquid crystal module (LCM) and an organic light emitting diode (OLED) module, which include a display panel and a driver for driving the display panel, Such as a notebook computer, a television, a computer monitor, a mobile electronic device such as a smart phone or an electronic pad, or the like, including such an LCM, an OLED module, and the like.

That is, the display device in this specification includes not only a display device in agreement such as an LCM and an OLED module, but also a set device which is an application including the display device.

However, in some cases, the LCM and the OLED module constituted by the display panel and the driver thereof are represented by the narrow "display device", and the electronic device as the finished product including such LCM and OLED module is distinguished as the "set device" . For example, the display apparatus of the consultation includes a liquid crystal (LCD) or organic light emitting (OLED) display panel and a source PCB which is a control unit for driving the display panel, and the setting apparatus is electrically connected to the source PCB And a set PCB that is a set control unit.

The display panel 100 used in this embodiment may be any type of display panel such as a liquid crystal display panel, an organic light emitting (OLED) display panel, and a plasma display panel (PDP) And is not limited to a specific display panel capable of generating a sound wave by being directly vibrated by the sound generating actuator 200.

More specifically, in the case where the display panel is a liquid crystal display panel, a pixel defined in a plurality of gate lines, a data line and a crossing region thereof, and a thin film transistor serving as a switching element for adjusting the light transmittance in each pixel An upper substrate provided with a color filter and / or a black matrix, and a liquid crystal material layer formed therebetween.

In addition, when the display panel is an organic light emitting (OLED) display panel, a pixel defined in a plurality of gate lines, a data line and an intersection region thereof, and a thin film An OLED layer on the array substrate, and an encapsulation substrate or encapsulation substrate disposed on the array substrate to cover the organic emission layer, and the like . The encapsulation substrate protects the thin film transistor, the organic light emitting element layer, and the like from external impact and prevents moisture from penetrating into the organic light emitting element layer.

The display panel used in the display device according to the present embodiment is not limited in its shape, but may be an organic light emitting display panel for the following reasons.

Specifically, in the case of a liquid crystal display panel, since there are many layers to be stacked and an indirect light source type backlight in which a separate light source is disposed must be provided, directivity of the liquid crystal material is shaken when it is directly vibrated by the sound generating actuator 200, Image distortion may occur.

On the other hand, an organic light emitting device of an organic light emitting (OLED) display panel does not require a separate light source corresponding to a self light emitting device, and a plurality of layers such as a polarizing layer (POL), a glass layer and an encapsulation layer Even if the light is directly oscillated by the acoustic generating actuator 200, the light emission characteristics of the organic light emitting layer are hardly influenced and distortion of the image does not occur. Therefore, in this embodiment, it is more preferable to use the organic light emitting display panel.

Meanwhile, since the display panel used in the display device according to the present embodiment has a general structure, a detailed description of the display panel will be omitted.

The display device according to the present embodiment includes a cover bottom 300 or a middle cabinet 500 and a baffle portion 400 for forming an air gap space that is disposed between the display panel and a space for transmitting the generated sound waves ).

That is, by sealingly connecting the display panel to the cover bottom at the edge of the air gap space, the air gap space can be defined as the four-sided sealing region, and such sealed air gap space can be expressed by the baffle structure.

The baffle portion 400 includes a bonding portion 412 disposed at the edge of the cover bottom or middle cabinet and adhered to the bottom surface of the display panel and a sealing portion 414 disposed at the outer portion of the bonding portion to further provide sealing of the air gap 600 ). ≪ / RTI >

At this time, the bonding portion 412 may be a double-side tape, and as described in more detail in FIG. 7, it is preferable that the height of the sealing portion 414 is made larger than the height of the bonding portion 412 desirable.

3 is a cross-sectional view of two types of acoustically-generated actuators used in an embodiment of the present invention.

The sound generating actuator 200 used in the present embodiment includes a magnet 220 as a permanent magnet, plates 210 and 210 'for supporting the magnet, a center pole 230 protruding in a central region of the plate, A bobbin 250 disposed around the center pawl 230, a coil 260 wound around the bobbin and applied with a current for generating sound, and the like.

On the other hand, the sound generating actuator used in the present embodiment may include both a first structure in which the magnet is disposed outside the coil and a second structure in which the magnet is disposed inside the coil.

3A is a first structure in which a magnet is disposed on the outer side of a coil, and can be expressed in a dynamic type or an outer type.

In the acoustic generating actuator according to the first structure, the lower plate 210 is fixed to the support hole 310 formed in the cover bottom 300, and the magnet 220, which is an annular permanent magnet, is disposed on the outer periphery of the lower plate do.

An upper plate 210 'is disposed on the upper portion of the magnet 220, and an outer frame 240 protruding from the upper plate is disposed on the outer side of the upper plate.

A center pole 230 protrudes from the central region of the lower plate 210 and a bobbin 250 surrounding the center pole 230 is disposed.

A coil 260 is wound around the lower side of the bobbin 250, and a current for generating an acoustic wave is applied to the coil.

Meanwhile, a damper 270 may be disposed between an upper portion of the bobbin and the outer frame 240.

The lower plate 210 and the upper plate 210 'are configured to secure the magnet generating actuator 200 to the cover bottom 300 while supporting the magnet 220, A magnet 220 provided in a circular shape and provided in a ring shape on the lower plate 210 is provided and an upper plate 210 is provided on the magnet.

As the lower plate 210 and the upper plate 210 are coupled to the cover bottom 300, a magnet 220 positioned between the lower plate 210 and the upper plate 210 'may be fixedly supported.

The plate may be made of magnetic material such as iron (Fe). The plate is not limited to the term, but may be expressed in other terms such as yoke.

Meanwhile, the center pole 230 and the lower plate 210 may be integrally formed.

The bobbin 250 is a ring-shaped structure formed of paper or an aluminum sheet or the like, and the coil 260 is wound around a certain lower region of the bobbin. These bobbins and coils can be combined to form a voice coil.

When a current is applied to the coil, a magnetic field is formed around the coil. Since there is an external magnetic field formed by the magnet 220, the entire bobbin moves to the upper side while being guided by the center pole according to Fleming's law.

On the other hand, since the front end portion of the bobbin 250 is in contact with the rear surface of the display panel 100, the display panel is vibrated according to the current application and non-application state, and sound waves are generated by the vibration.

The magnets 220 may be sintered magnets such as barium ferrite, and may be made of ferric oxide (Fe 2 O 3), barium carbonate (BaCO 3), or the like. (Al), nickel (Ni), cobalt (Co) alloy cast magnets, and the like can be used, but the present invention is not limited thereto.

On the other hand, a damper 270 is disposed between a part of the upper part of the bobbin 250 and the outer frame 240, and the damper 220 is formed in a corrugated structure to shrink and relax as the bobbin moves up and down. . That is, since the damper 270 is connected to the bobbin 250 and the outer frame 240, the vertical vibration of the bobbin is limited by the restoring force of the damper 270. Specifically, The bobbin can be restored to its original position due to the restoring force of the damper 270 when it is vibrated or vibrates below a predetermined height.

Such a damper may be represented by other terms such as an edge.

On the other hand, FIG. 3B is a first structure in which a magnet is disposed inside a coil, and can be expressed as a micro-type or a magnetic-type.

In the acoustic generating actuator according to the second structure, the lower plate 210 is fixed to the support hole 310 formed in the cover bottom 300, the magnet 220 is disposed in the central region of the lower plate, The center pole is extended.

The upper plate 210 'protrudes from the outer periphery of the lower plate, and the outer frame 240 is disposed outside the upper plate.

A bobbin 250 is disposed to surround the magnet 220 and the center pole 230 and a coil 260 is wound around the bobbin.

A damper 270 is disposed between the outer frame 240 and the bobbin.

The second type of acoustically generating actuator is characterized in that leakage magnetic flux is small and the overall size can be made smaller than that of the first type in which the magnet is disposed on the outer side, but magnetic flux reduction by a large current input may occur and manufacturing is difficult .

In this embodiment, all of the actuators according to the first mode or the second mode can be used. For convenience, the structure according to the first mode will be described below for the sake of convenience.

In addition, the sound generating actuator used in the display apparatus according to the present embodiment is not limited to the embodiment shown in Fig. 3. As long as the display panel can be vibrated up and down according to current application to generate sound, It may be used.

4 shows a state in which the sound generating actuator according to the embodiment of the present invention vibrates the display panel to generate sound.

4A shows a state in which a current is applied, in which the center pole connected to the lower surface of the magnet becomes the N pole, and the upper plate connected to the upper surface of the magnet becomes the S pole, and an external magnetic field is formed between the coils.

In this state, when a current for generating sound is applied to the coil, an applied magnetic field is generated around the coil, and a force for moving the bobbin upward due to the applied magnetic field and the external magnetic field is generated.

Therefore, as shown in Fig. 4A, the bobbin moves upward and the display panel in contact with the tip of the bobbin vibrates upward.

When the application of current is stopped or a current in the opposite direction is applied in this state, a force for moving the bobbin downward is generated according to a similar principle as shown in Fig. 4B, and thus the display panel vibrates downward.

In this manner, the display panel vibrates up and down according to the current application direction and size of the coil, and sound waves are generated by the vibration.

5 shows an example of the coupling state between the sound generating actuator according to the embodiment of the present invention and the cover bottom, which is the supporting structure of the display apparatus.

6 shows another embodiment of the coupling structure of the sound generating actuator and the cover bottom.

The sound generating actuator 200 according to the present embodiment can be supported through a support hole formed on a cover bottom or a back cover, which is a supporting structure of the display device, and FIGS. 5 to 6 show various supporting structures.

5, a support hole 310 is formed in the cover bottom 300, and at least one of the lower plate 210, the magnet 220 and the upper plate 210 'of the acoustically-generating actuator 200 Is inserted to be accommodated in the support hole.

An extension portion 212 is formed on the bottom surface of the lower plate 210 so as to extend to the outside of the lower plate 210. The extension portion 212 is fixed to the bottom surface of the cover bottom 310, Can be mounted on the cover bottom.

As described above, when the sound generating actuator 200 is fixed to be inserted into the support hole formed in the cover bottom, the distance between the display panel and the cover bottom can be reduced, so that the thickness of the display device can be reduced.

That is, an air gap, which is a space in which the display panel can vibrate, must exist between the display panel and the cover bottom. If the sound generating actuator is configured to be inserted / fixed in the support hole of the cover bottom, The height of the sound generating actuator disposed between the inner surfaces can be made small, so that the air gap can be minimized.

5 is a perspective view illustrating a state in which a screw hole is formed in the rear surface of the cover bottom and a bolt 320 or a screw is screwed through a through hole formed in the extension portion 212 of the lower plate, And fastened to the hole to fix it.

6A is a plan view showing a pem nut 330 or a self-clinching nut 330 which can secure a certain distance between the cover bottom 300 and the extension part 212 of the lower plate, the clinching nut is disposed and fixed with the bolts 320.

As shown in FIG. 6B, when a pem nut (330) or a self clinching nut is used, a certain space is secured between the sound generating actuator and the cover bottom so that the vibration of the actuator is transmitted to the cover bottom It can be minimized.

6C, a bonding member such as a double side tape is disposed between the extension 212 of the lower plate of the actuator and the cover bottom, and is bonded and fixed.

When the adhesive member is used as shown in FIG. 6C, the adhesive member may act as a kind of damper when the elasticity and the thickness of the adhesive member are appropriately adjusted, thereby minimizing the transmission of the vibration of the actuator to the cover bottom.

As shown in Figs. 5 and 6, by adopting a method of inserting and fixing the sound generating actuator 200 that directly vibrates the display panel in contact with the display panel into the support hole formed in the cover bottom, the actuator is completely accommodated in the display device It is possible to reduce the thickness of the display device.

Fig. 7 shows an example of a baffle portion formed between a display panel and a middle cabinet, which is one of the supporting structures of the display panel, in order to form an air gap between the display panel as a diaphragm and the cover bottom.

7A, in the panel vibration type sound generating apparatus according to the present embodiment, the panel may be vibrated by the sound generating actuator 200 between the display panel 100 and the supporting structure (cover bottom 300) It is necessary to secure an air gap 600 which is a space.

In addition, one side of the display panel must be bonded to the support structure of the display panel so that sound waves can be generated when the display panel is vibrated. In particular, the generated sound should not leak to the outside through the side surface of the display device.

For this purpose, in the display device according to the present embodiment, a constant baffle portion 400 is formed between the lower surface of the display panel and the supporting structure.

More specifically, a certain section (i.e., air gap space) around the sound generating actuator is defined, and at the edge of the section, a baffle section is disposed between the lower surface of the display panel and the upper surface of the middle cabinet or cover bottom, Preferably comprises an adhesive member 412 such as a double-sided tape adhered between the bottom surface of the display panel and the upper surface of the supporting structure of the display device) and a sealing portion 414 further disposed at the outer periphery of the adhesive member.

In this case, the partition in which the baffle is formed may be an entire display panel area defined by the four edges of the display panel, but is not limited thereto, and may be defined as an area excluding the area where the source PCB is disposed .

Further, when two or more sound generating actuators are provided for realizing stereo, stereophonic sound, etc., the compartment in which the baffle is formed may be divided into two or more.

7, the supporting structure of the display device may further include a middle cabinet 500 coupled to the cover bottom and for seating a part of the display panel, in addition to a cover bottom 300 covering the entire rear surface of the display panel .

The middle cabinet 500 is a frame-shaped member formed along the outer periphery of the display panel and includes a horizontal support portion 502 on which a part of the display panel is seated, And a vertical support 504 that covers the sides of the tapered portion 504.

This middle cabinet 500 constitutes a side external portion of the display device or the set device, and may not be used in some cases or may be integrally formed with the cover bottom.

7, the adhesive member 412 constituting the baffle portion 400 is a double-sided tape disposed between the upper surface of the horizontal support portion of the middle cabinet 500 and the display panel, and the lower surface of the display panel is placed in the middle cabinet It has a function to fix adhesive.

It is also preferable that the sealing portion 414 constituting the baffle portion is further disposed on the outer periphery of the adhesive member and has a thickness or height greater than the thickness or the height of the adhesive member.

The sealing portion 414 may be made of a material such as rubber having high elasticity and has a thickness t2 which is larger than the thickness t1 of the bonding member 412 as shown in Fig. 7B.

7B, one side of the adhesive member 412, which is a double-sided tape having a thickness t1, is adhered and disposed on the inner side of the upper surface of the horizontal support 502 of the middle cabinet 500, A sealing portion 414 of an elastic material having a thickness is disposed.

In this state, when the display panel 100 is attached to the other bonding surface of the bonding member 412, the sealing portion 414 having a larger thickness is pressed to a certain extent, thereby bonding the display panel and the middle cabinet. (Fig. 7C)

Therefore, the sealability of the air gap region around the sound generating actuator can be further improved.

The display panel 100 and the cover bottom 300 are combined with each other while forming an air gap 600 as much as the thickness of the horizontal support portion 502 and the adhesive member 412 of the middle cabinet as shown in FIG. It is possible to secure a vibration space which can be generated and to prevent the sound waves generated inside from flowing out along the side surface of the display device.

Particularly, the baffle portion 400 disposed at the edge of the air gap space has a double structure of the adhesive member 412 and the sealing portion 414, and the sealing portion has a larger thickness, thereby further improving the sealability of the air gap space So that the leakage of sound can be further blocked.

The middle cabinet 500 herein may be replaced by other representations such as a guide panel, a plastic chassis, a p-chassis, a support main, a main support, a mold frame, It should be understood that the square frame-like structure includes all types of members connected to the cover bottom and used to support the display panel and the baffle portion.

The middle cabinet 500 is made of a synthetic resin material such as polycarbonate and can be manufactured through an injection molding method, but is not limited thereto.

8 shows a structure in which the adhesive member and the sealing portion are directly seated on the cover bottom, as another embodiment of the baffle portion.

As described above, a middle cabinet may be used to support between the cover bottom and the display panel, but this middle cabinet may not necessarily be a necessary structure.

In the embodiment of FIG. 8, the cover bottom 300 without the middle cabinet is formed in a structure supporting one side of the display panel while forming the side surface appearance of the display device.

That is, in the embodiment of FIG. 8, a stepped portion 360 protruding upward from the base surface is formed at one side of the cover bottom 300, and a side supporting portion 362 extending in the vertical direction outside the stepped portion 360 A cover bottom 300 is provided.

A part of the edge of the display panel 100 is seated and joined to the stepped portion 360 of the cover bottom 300 and the side support portion 362 of the cover bottom surrounds and protects the side surface of the display panel 100, And the cover bottom forms an outer portion of the entire side surface and rear surface of the display device.

In this structure, in order to construct the baffle portion 400 for generating sound or the like, a double-sided adhesive member 412 is disposed inside the step portion 360 of the cover bottom and has a thickness larger than the thickness of the adhesive member The sealing portion 414 is disposed outside the adhesive member.

In this state, the display panel 100 is seated on the step portion 360 of the cover bottom to be bonded to one side of the adhesive member 412, thereby being engaged with the cover bottom, and then the sealing portion 414 is squeezed, Sealing of the air gap space is ensured.

8, the intermediate supporting structure such as the middle cabinet is eliminated, and the structure is simplified. The baffle portion 400 disposed at the edge of the air gap space is disposed between the adhesive member 412 and the sealing portion 414 It is possible to secure a vibration space in which the display panel can generate sound and to prevent the sound waves generated in the display panel from flowing out to the outside along the side surface of the display device .

In the present embodiment, the thickness of the air gap space, that is, the distance G between the display panel and the cover bottom in the air gap space can be set to about 1.0 to 3.0 mm, but the present invention is not limited thereto. It can be set to a different range.

However, since there is a need to reduce the thickness of the display device, it is desirable that the thickness G of the air gap space be minimized, taking into account the vibration amount of the display panel, the band to be output, In this embodiment, it is confirmed that it is optimal to set the thickness G of the air gap space to about 2.0 mm.

Fig. 9 shows the positional relationship between the source PCB for driving the display panel and the set PCB driving set PCB disposed on the rear side of the display device.

As shown in Fig. 9, the display device includes a source PCB, which is a circuit board including a source driver IC (S-DIC) for driving a data line formed on a display panel by driving a display panel, and is abbreviated as S-PCB .

A display device or a set device including the display device is connected to the S-PCB, and a control printed circuit board (C-PCB: Control) for controlling the display device or the set device by mounting control components and various electric devices A printed circuit board).

In more detail, the organic light emitting display device to which the present embodiment can be applied includes an organic light emitting display (OLED) in which a plurality of data lines DL and a plurality of gate lines are arranged and a plurality of sub pixels A panel 100, a data driver for driving the plurality of data lines DL, a gate driver for driving the plurality of gate lines GL, and a controller for controlling the data driver and the gate driver.

The controller supplies various control signals to the data driver and the gate driver to control the data driver and the gate driver. The controller starts scanning according to the timing implemented in each frame, and uses the input image data input from the outside in the data driver And outputs the converted image data, and controls the data driving at a proper time according to the scan.

Such a controller may be a timing controller used in a conventional display technology, or may be a controller that performs a further control function including a timing controller.

The data driver drives the plurality of data lines DL by supplying the data voltages to the plurality of data lines DL. Here, the data driver is also referred to as a " source driver ".

Such a data driver may drive a plurality of data lines including at least one source driver integrated circuit (S-DIC).

The gate driver successively drives the plurality of gate lines GL by sequentially supplying the scan signals to the plurality of gate lines GL. Here, the gate driver is also referred to as a 'scan driver', and the gate driver may include at least one gate driver integrated circuit (G-DIC).

On the other hand, each source driver integrated circuit (S-DIC) is connected to a bonding pad of an organic light emitting display panel by a tape automated bonding (TAB) method or a chip on glass (COG) Or may be directly disposed on the organic light emitting display panel, or may be integrated and disposed on the organic light emitting display panel, as the case may be. In addition, each source driver integrated circuit (S-DIC) may be implemented by a chip on film (COF) method which is mounted on a film connected to the organic light emitting display panel.

That is, the display device to which the present embodiment can be applied includes at least one source printed circuit board (S-PCB) necessary for circuit connection to at least one source driver integrated circuit (S-DIC) A control printed circuit board (C-PCB) or a set PCB for mounting various electric devices and control components for controlling the entire display device.

At this time, at least one source driver integrated circuit (S-DIC) is mounted on at least one source PCB (S-PCB) or a chip on film (Chip) having at least one source driver integrated circuit -On-Film: COF) can be connected.

The control PCB (C-PCB) or the set PCB 800 is provided with a controller for controlling the operation of data drivers and gate drivers, and a controller for supplying various voltages or currents to a display panel, a data driver and a gate driver A power management IC (PMIC) for controlling various voltages or currents to be supplied, and the like.

At this time, the source PCB is generally located on the upper side or the lower side of the display panel, but may be located both above and below the organic light emitting display panel 110, depending on the driving method, the panel designing method, and the like.

9, the source PCB 700 is connected to the display panel 100 through a chip-on-film (COF) 710 and disposed on the lower rear surface of the display panel.

On the other hand, a control printed circuit board (C-PCB) or a set PCB 800 is disposed on the outer rear side of the cover bottom 300 and electrically connected to a source PCB (not shown) inside the cover bottom 300 via a flexible cable 700).

9, it is difficult to form the baffle portion as shown in FIG. 7 on the lower side of the display panel on which the sound generating actuator 200 is mounted.

9B, since the source PCB 700 and the chip-on film 710 connected thereto are disposed in the vicinity of the lower side of the display panel, a baffle portion 710 such as an adhesive member 412 and a sealing portion 414 is formed in the vicinity of the source PCB 700, It is difficult to arrange the baffle portion 400, and there is a possibility that the sealing performance of the air gap space is lowered.

Further, a cable through hole is formed in a lower part of the cover bottom for passing a flexible cable for connecting between the source PCB 700 disposed inside the cover bottom and the set PCB 800 disposed outside the cover bottom , There is a possibility that the generated sound leaks rearward through such a cable through hole.

Therefore, in order to apply the sound generating device according to the present embodiment to the display device having the structure as shown in FIG. 9, it is necessary to solve the above-described problem of the sealing property of the baffle portion and the acoustic leakage problem. Give an example.

Fig. 10 shows an embodiment including an area dividing member further formed in the middle cabinet, and a cable through hole for passing a connecting cable (FFC) formed in the cover bottom.

In the embodiment of FIG. 10, in order to eliminate the problem of the structure described with reference to FIG. 9, the apparatus further includes an area dividing member 510 for dividing the middle cabinet into two or more areas, and a baffle section is formed on the area dividing member Lt; / RTI >

The area dividing member 510 is for dividing the entire area of the middle cabinet surrounding the entire display panel into a first area A in which the source PCB is included and a second area B in which the source PCB is not included, The acoustic generating actuator 200 is disposed in a part of the two regions B.

The region dividing member 510 may be formed in a bar shape having a thickness corresponding to the horizontal support portion of the middle cabinet and may be attached to the middle cabinet 500 through welding or the like, The entirety of the middle cabinets may be integrally formed as a unit,

10A, the area dividing member 510 is disposed long in the horizontal direction of the display device, and three sides of the middle cabinet corresponding to the second area B and an adhesive member 412 and a sealing portion 414 are disposed.

10B is a sectional view taken along the line II 'in FIG. 10A, in which the adhesive member 412 and the sealing portion 414 are disposed on the region dividing member 510 of the middle cabinet to seal the second region B into the air gap space .

The source PCB 700 and the set PCB 800 are connected to the first region A where the source PCB is included in the lower part of the cover bottom 300, A cable through hole 370 for passing the connecting cable 810 connecting the connecting cable 810 is formed.

Only the second region B without the source PCB is formed as the acoustic generating region using the region dividing member 510 as shown in FIG. 10, so that the phenomenon of reduction in the sealing property of the acoustic generating region due to the interference of the source PCB can be minimized It is effective.

Also, by arranging the cable through hole 370 in the first area A where the source PCB exists, it is possible to prevent the acoustic leakage phenomenon by the cable through hole.

11 is a view for explaining a layout relation between the source PCB for driving the display panel and the cover bottom, and a noise generation problem caused thereby.

As shown in FIG. 11A, a source PCB 700 including a source driver integrated circuit (S-DIC) or a data driver is connected to a display panel through a chip-on film or the like, and disposed on one side (lower side) do.

Therefore, in the region where the source PCB is disposed, the gap g between the source PCB and the cover bottom is smaller than the gap between the display panel 100 and the cover bottom 300 in the other region.

Therefore, in the region where the source PCB is disposed, when the acoustic-wave generating actuator 200 according to the present embodiment is disposed to vibrate the display panel, there is a possibility that the source PCB vibrating in unison with the display panel collides with the cover bottom.

This collision between the source PCB and the cover bottom may cause noise, as well as damage to the source PCB.

In addition, even if the source PCB does not hit the cover bottom directly, it can affect the performance of the source PCB if strong vibrations of the display panel are continuously transmitted to the source PCB when the sound is generated.

To solve this problem, a method of providing a buffering member for protecting the source PCB between the source PCB and the cover bottom or between the display panel and the cover bottom as shown in FIG. 12 is proposed.

Fig. 12 shows an embodiment including a buffer member capable of preventing interference and noise between the source PCB and the cover bottom according to Fig.

12, a source PCB 700 including circuit elements for driving the display panel is disposed on one rear side of the display panel, and an engraved step 380 is formed in a cover bottom region opposite to the source PCB And a first cushioning member 920 having a predetermined elasticity is disposed on the upper surface of the engraved stepped portion 380.

Further, the cover bottom may be further provided with a second buffer member 910 which is elongated along one direction.

12A, the display panel may be divided into a first area A covering the source PCB and a second area B covering the sound generating actuator, and the second buffer member 920 may be divided into a first area A It is preferable to arrange the first region A and the second region B in a long direction.

Of course, although not shown, in the embodiment of FIG. 12, the baffle portion 400 including the bonding member 412 and the sealing portion 414 described in FIG. 7 or 8 may be disposed on all four sides of the display panel There will be.

The first cushioning member 910 and the second cushioning member 920 may be formed of, for example, a one side tape or a double side tape, but the present invention is not limited thereto, Paper, and other materials.

The first buffer member 910 is disposed on the recessed stepped portion 380 of the cover bottom while the upper surface of the first buffer member 910 is spaced from the source PCB by a predetermined distance while the second buffer member 920 Is preferably arranged so that one surface is in contact with the cover bottom and the other surface is in contact with the bottom surface of the display panel.

Of course, without the intrinsic stepped portion 380 of the cover bottom, the first cushioning member 910 may be disposed on a portion of the top surface of the cover bottom facing the source PCB.

As shown in FIG. 12B, by forming the recessed stepped portion 380 in the cover bottom region corresponding to the source PCB, the distance between the source PCB and the cover bottom is increased, so that even if there is display panel vibration for generating sound, Thereby reducing the possibility of collision.

Furthermore, by disposing the first buffer member 910 on the engraved stepped portion 380 of the cover bottom, even if the display panel is vibrated so much that the source PCB moves in the direction of the negative step of the cover bottom, Thus reducing noise emissions due to interference between the source PCB and the cover bottom, and reducing the possibility of damage to the source PCB.

In addition, the second buffer member 920 blocks a portion of the vibration of the display panel from being transmitted to the source PCB 700 disposed on the rear side of the display panel when the display panel vibrates in the second area B, which is the sound generating area, The weakening of the performance of the source PCB due to the continuous vibration of the display panel can be minimized.

In addition, the position of the sound generating actuator can be changed according to the arrangement of the second buffer member 920.

12A, when the second buffer member 920 is spaced apart from the lower side of the display panel by a distance d, the sound generating actuator 200 moves by about 2d from the initial position P1 to P2 As shown in FIG.

Thus, by changing the position of the sound generating actuator by about twice the distance d between the one side of the display panel and the second cushioning member 920, the change in the acoustic output characteristic due to the installation of the second cushioning member is minimized .

FIG. 13 is a graph showing the noise reduction effect when the buffer member according to the embodiment of FIG. 12 is used.

As a result of the actual test, when the first cushioning member 910 and the second cushioning member 920 described in Fig. 12 are not used, as shown by the dotted line in Fig. 13, a low frequency band of several tens Hz and an unnecessary frequency band It was confirmed that a lot of noise was generated.

On the other hand, when the buffer member shown in FIG. 12 is used, it can be seen that the noise in the corresponding band is greatly reduced as indicated by the solid line in FIG.

FIG. 14 is a diagram showing the arrangement relationship between the sound generating actuator and the set PCB in the display device according to the embodiment of the present invention.

In general, a display device or a set device including the display device is connected to a source PCB in addition to a source PCB including a data line of a display panel or a control circuit (a data driver IC or the like) for driving a touch function, And a set PCB for supplying power.

As described in Fig. 10 and the like, the source PCB is attached to the rear surface of the display panel, and the set PCB is attached to the outside of the rear support structure of the display device such as a cover bottom or a back cover.

In the embodiment of Fig. 14, by disposing the sound generating actuator at the first position of the support structure of the display device and disposing the set PCB of the set device at the second position different from the first position, A display device for avoiding interference is provided.

As shown in FIG. 14, the set PCB 800 disposed on the rear surface of the cover bottom includes a power board 810 for supplying power to a display panel and the like, various timing pulses for driving gate lines and data lines, A timing controller (T-con) 820 for generating a timing signal, and a main board 830 including the entire control circuit of a display device or a set device.

Each of the boards 810, 820 and 830 of the set PCB 800 is attached to the rear surface of the cover bottom 300 and the sound generating actuator 200 is inserted into a support hole formed in the cover bottom .

Therefore, it is preferable to avoid interference between the two members by disposing the mounting position (first position) of the acoustically generating actuator 200 and the mounting position (second position) of the set PCB different from each other as shown in Fig.

Even if the acoustic generating actuator 200 is fixed in the cover bottom, if the acoustic generating actuator and the set PCB are overlapped with each other, the vibration of the acoustic generating actuator is continuously transmitted to the circuit elements of the set PCB, Can be adversely affected.

Therefore, by disposing the mounting position (first position) of the sound generating actuator 200 and the mounting position (second position) of the set PCB attached to the outside of the cover bottom so that they do not overlap each other as shown in FIG. 14, And it is possible to minimize the performance degradation of the set PCB.

15 is a view showing a case where two or more actuators are symmetrically provided in a display device and a twist phenomenon of a cover bottom which may occur due to a difference in vibration amount in this case.

On the other hand, according to the present embodiment, a plurality of acoustically-generated actuators can be symmetrically arranged on the left, right, top, and bottom of the display panel, and output different sounds for each area.

For example, as shown in FIG. 15A, one or two left sound generating actuators 1210 and 1210 'are disposed on the left side of the display panel for the purpose of stereo sound implementation or the like, and one or two Right sound generating actuators 1220 and 1220 'are disposed to vibrate the left and right actuators differently.

15A, when the left and right sound generating actuators 1210 and 1220 continuously repeat different vibrations as described above, the difference in vibration amount between the left and right cover bottoms 1300 is continuously accumulated .

Generally, since the cover bottom is made as thin as possible, there is a possibility that the cover bottom may be bent or deformed if the difference in the amount of vibrations in the left and right is accumulated. That is, as shown in FIG. 15B, the cover bottom 1300 can be twisted or deformed. Also, even if the cover bottom 1300 is not deformed, a sound may be distorted due to vibrations of the left and right actuators when the cover bottom is vibrated.

In order to overcome such a problem, a structure is proposed in which, when two or more acoustically-generating actuators are used as in the embodiment of Fig. 16, the reinforcing members are disposed inside the support structure of the display device.

Fig. 16 shows a structure in which a reinforcing member is disposed inside the cover bottom to prevent acoustic distortion due to twist of the cover bottom or vibration of the cover bottom according to Fig.

In the embodiment shown in Fig. 16, in order to prevent deformation of the cover bottom or acoustic distortion due to vibration of the cover bottom when a plurality of acoustically-generating actuators having different vibration characteristics are used as described in Fig. 15, One or more reinforcing members 1310 may be disposed on the inner side or the outer side.

The reinforcing member 1310 may be formed in the shape of a long bar passing through a plurality of positions near the acoustically-generated actuator, and may be disposed at a specific position so as to optimize the reinforcing property.

16A, when the two left sound generating actuators 1210 and 1210 'and the two right sound generating actuators 1220 and 1220' are disposed, the reinforcing member 1310 includes two left sound generating actuators 1210 , 1210 'and the midpoint Q' of the two right sound generating actuators 1220, 1220 '.

In such a configuration, the reinforcing performance of the reinforcing member 1310 can be optimized even when the two sound generating actuators on the left and right sides have different vibration characteristics.

As shown in FIG. 16B, the reinforcing member 1310 may be manufactured in the form of a separate metal bar and then attached to the inner surface of the cover bottom, but the present invention is not limited thereto.

For example, when the cover bottom is manufactured by injection molding or the like, a part of the inner surface of the cover bottom may be protruded to form the reinforcing member 1310 as one body.

The reinforcing member 1310 is not necessarily present on the inner surface of the cover bottom but may be disposed on the outer surface of the rear portion of the cover bottom. However, considering the apparent reason and thickness of the display device, As shown in FIG.

Fig. 17 shows specific arrangements of the reinforcing members of the cover bottom.

17A illustrates a case in which three sound generating actuators are respectively disposed on the right and left sides. In this case, two reinforcing members 1310 and 1310 'are disposed, and the first reinforcing member 1310 has three left / Q 'of a line segment connecting the two actuators on the upper side of the generating actuators, and the second reinforcing member 1310' is arranged to pass through the two actuators on the lower one of the three left and right sound generating actuators And may be arranged to penetrate the center point S-S 'of the line segment.

The reinforcing member 1310 may be disposed so as to pass through the centers of the left and right actuators 1210 and 1210 ', and may be an actuator that is inserted and supported in the cover bottom. The reinforcing member may be divided into two or more portions in consideration of the installation structure of the reinforcing member.

As described above, when two or more sound generating actuators having different vibration characteristics are symmetrically disposed, the sound generating actuator can prevent distortion (distortion) of the cover bottom due to different vibration characteristics or acoustic distortion due to vibration of the cover bottom Effect.

Figure 18 shows an embodiment further comprising an acoustic compensation member disposed to maintain acoustic output characteristics when the acoustic generating actuator is moved up and down for design reasons.

18A shows a state in which the sound generating actuator 200 is installed at the initial position P3 having the optimum sound output characteristic.

However, it may be necessary to maintain the slim of the upper part or to move the sound generating actuator by a certain distance D from the initial position P3 for reasons such as the design of the design or the parts.

In this case, when the acoustic generating actuator is merely moved, the state position with respect to the baffle portion 400 is changed, and as a result, the acoustic output characteristic may deteriorate.

Therefore, in such a case, when the sound generating actuator is moved from the initial position P to the target position P4 spaced apart by the moving distance D, the sound emitted from the sound generating actuator is displaced from the edge (side) It is preferable to arrange the compensating member 1400 further.

18B, when the acoustic generating actuator is moved from the initial position P3 to the position P4 separated by D in the downward direction for the design reasons, the acoustic compensating member, which is long in the horizontal direction at a position spaced by 2D from the upper edge of the display panel, (1400). When the sound compensating member is disposed at a position corresponding to about twice the moving amount D of the sound generating actuator as described above, since the actuator moved in the center of the changed air gap space by the sound compensating member is located, The change can be minimized.

The sound compensating member 1400 may be implemented as a double side tape disposed between the cover bottom and the display panel.

In this way, when it is necessary to move the acoustic generating actuator, the acoustic compensating member is disposed at a position proportional to the moving distance to maintain the relative position of the actuator in the entire air gap region, .

19 is a graph showing acoustic output characteristics in a case where the panel vibration type sound generating apparatus according to the present embodiment is used in comparison with a conventional general speaker.

As a result of an actual experiment, when a speaker disposed at the rear or bottom of the display panel as shown in Fig. 1 is used, sudden sound intensity reduction (sound pressure reduction) occurs in the middle / high frequency band of 4000 Hz or more Respectively.

On the other hand, as shown by the solid line in Fig. 19, when a method of directly vibrating the display panel by fixing at least one sound generating actuator to the supporting structure as in the present embodiment is used, the sound pressure reduction phenomenon in the middle / It can be confirmed that the acoustic output characteristic in the high-frequency band is greatly improved.

As a result, it can be seen that by using this embodiment, it is possible to provide a rich sound output in all ranges.

As described above, according to the present embodiment, since at least one sound-generating actuator is fixed to the support structure and the display panel is directly vibrated to generate sound, the progress direction of the sound coincides with the video output direction, There is an effect that the acoustic output characteristic can be improved in a wide band.

Further, since there is no need to dispose a separate speaker in the display device or the set device, the mechanism of the set device can be designed easily, and the thickness of the display device or the set device can be reduced.

Particularly, by forming a constant air gap between the display panel and the sound generating actuator and inserting and fixing the sound generating actuator into the support hole formed in the supporting structure of the display device, it is possible to reduce the thickness of the display device There is an effect.

Further, by forming the baffle portion including the adhesive member (double-faced tape portion) adhered between the bottom surface of the display panel and the upper surface of the supporting structure of the display device and the sealing portion further disposed at the outer periphery of the adhesive member, sound leakage performance can be improved .

In addition, by arranging at least one cushioning member disposed between the support structure for fixing / supporting the sound generating actuator and the source PCB of the display panel or between the back surface of the display panel near the source PCB and the inner surface of the support structure, It is possible to prevent interference and noise between the source PCB (S-PCB) for driving and the supporting structure of the display device.

Further, when two or more acoustic generating actuators are used, it is possible to prevent deformation of the supporting structure due to different vibration characteristics of the two or more acoustic generating actuators by arranging the reinforcing members in the supporting structure of the display device.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. , Separation, substitution, and alteration of the invention will be apparent to those skilled in the art. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: display panel 200: sound generating actuator
210, 210 ': upper and lower plates 220: magnet
230: center pole 240: outer frame
250: Bobbin 260: (Voice) coil
300, 1300: cover bottom 310: support hole
370: Cable through hole 380: Negative angle step
400: baffle portion 412: adhesive member
414: sealing part 500: middle cabinet
600: air gap (space) 700: source PCB (S-PCB)
800: set PCB 910: first buffer member
920: second buffer member

Claims (11)

A display panel for displaying an image;
An acoustic generating actuator arranged to be in contact with one surface of the display panel and generating sound by vibrating the display panel;
A cover bottom supporting the rear of the display panel;
A source PCB disposed on one side rear surface of the display panel to drive the display panel;
A first buffer member disposed on the inner surface of the cover bottom facing the source PCB and spaced apart from the source PCB by a predetermined distance;
And the panel oscillation type display device. The method according to claim 1,
Wherein an intaglio step is disposed on an inner surface of the cover bottom corresponding to the source PCB, and the first buffer member is disposed on an upper surface of the depressed step. 3. The method of claim 2,
The cover bottom separates a first area covering the source PCB and a second area covering the sound generating actuator and a second buffer member contacting the upper surface of the cover bottom and the bottom surface of the display panel is disposed A panel oscillation type sound generation display device. The method of claim 3,
And the second buffering member is disposed long in a direction to separate the first region and the second region. The method of claim 3,
Wherein the upper surface of the first buffer member is spaced apart from the source PCB by a predetermined distance and one surface of the second buffer member is in contact with the cover bottom and the other surface is in contact with the bottom surface of the display panel, Device. The method according to claim 1,
Wherein the sound generating actuator is inserted into a support hole provided in the cover bottom and is fixed to the cover bottom. The method according to claim 6,
The sound generating actuator includes a lower plate inserted into the support hole, a magnet disposed on the lower plate, a center pole disposed at the center of the lower plate, and a center pole disposed to surround the center pole, And a coil wound around an outer periphery of the bobbin. 8. The method of claim 7,
Wherein the lower plate further comprises an extension extending outwardly and the extension is fixed to the bottom of the cover bottom. 9. The method of claim 8,
A bolt screwed into a screw hole formed in the cover bottom through a through hole provided in the extension portion and a cover member fixed to the extension portion and the cover bottom via one of an adhesive member disposed between the extension portion and the cover bottom, A combined panel oscillating sound generating display. The method according to claim 1,
Further comprising a set PCB disposed on the outer rear surface of the cover bottom and including a control control circuit for controlling the entire display device,
Wherein a first region in which the sound generating actuator is disposed and a second region in which at least one board constituting the set PCB are disposed do not overlap with each other. The method according to claim 1,
When the sound generating actuator is moved from the initial position P3 to the target position P4 spaced apart from the initial position P3 by an amount of movement D, the sound compensating member is disposed at a position spaced from the edge of the display panel, And a display unit for displaying the generated sound.

Images