KR20190069074A - Electronic apparatus - Google Patents

Abstract

The present application provides an electronic apparatus which can output a sound to the front of a display panel through vibration of a display module. To this end, according to the present application, the electronic apparatus comprises: a display module for displaying an image; a housing supporting the display module; and a sound generation apparatus for vibrating the display module. A sound can be output by performing in-plane vibration according to the vibration of the sound generation apparatus.

Description

[0001] ELECTRONIC APPARATUS [

The present application relates to electronic devices.

2. Description of the Related Art Generally, electronic devices such as a television, a monitor, a notebook computer, a smart phone, a tablet computer, an electronic pad, a wearable device, a watch phone, a portable information device, a navigation device, And a sound device for outputting sound associated with the sound.

However, in a general electronic apparatus, sound generated in a sound apparatus is output to a rear side or a side direction of a main body (or a housing) rather than a front side of the display panel, so that the viewer (or a user) There is a problem that it disturbs the immersion of viewers watching the video.

It is an object of the present invention to provide an electronic apparatus capable of outputting sound to the front of a display panel through vibration of a display module.

It is another object of the present invention to provide an electronic apparatus in which the low frequency reverse frequency vibration characteristic of the display module is improved.

According to an aspect of the present invention, there is provided an electronic apparatus including a display module for displaying an image, a housing for supporting the display module, and a sound generator for vibrating the display module, So that the sound can be outputted by the in-plane vibration.

The electronic apparatus according to the present invention can output sound generated by the in-plane vibration of the display module according to the driving of the sound generator to the front direction of the display module, and the sound generated according to the vibration of the display module can be improved .

In addition to the effects of the present application discussed above, other features and advantages of the present application will be set forth below, or may be apparent to those skilled in the art to which the present application belongs from such description and description.

1 is a perspective view showing an electronic apparatus according to an example of the present application.
2 is a cross-sectional view taken along the line I-I 'shown in Fig.
3 is a cross-sectional view taken along the line II-II 'shown in FIG.
4 is a perspective view showing the housing shown in Figs. 1 to 3. Fig.
5 is a view for explaining sound output according to in-plane vibration of a display module in an example of the present application.
6 is another cross-sectional view of the line I-I 'shown in Fig.
Figure 7 is another cross-sectional view of line I-I 'shown in Figure 1.
8 is a perspective view showing the housing shown in Fig.
9 is another cross-sectional view of the line I-I 'shown in Fig.
10 is an exploded perspective view showing the sound generator shown in Fig.
11 is a view showing a process of converting the vertical vibration motion of the piezoelectric device using the motion switching member shown in Figs. 9 and 10 into the horizontal vibration motion.
12 is a graph showing acoustic output characteristics of an electronic device according to an example of the present application and a comparative example.

Brief Description of the Drawings The advantages and features of the present application, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as limited to the particular embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art. And the scope of the invention is to be defined only by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like described in the drawings for describing an example of the present application are illustrative, and thus the present application is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description of the present application, a detailed description of related art will be omitted if it is determined that the subject matter of the present application may be unnecessarily obscured.

Where the terms "comprises," "having," "consisting of," and the like are used in this specification, other portions may be added as long as "only" is not used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the scope of the present application.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, May refer to any combination of items that may be presented from more than one.

Each of the features of the various embodiments of the present application may be combined or combined with each other partially or entirely, technically various interlocking and driving are possible, and the examples may be independently performed with respect to each other, .

Hereinafter, an example of an electronic apparatus according to the present application will be described in detail with reference to the accompanying 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 application, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present application unclear.

1 is a cross-sectional view taken along the line I-I 'shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line II-II' shown in FIG. 1 And Fig. 4 is a perspective view showing the housing shown in Figs. 1 to 3.

1 to 4, an electronic apparatus according to an exemplary embodiment of the present application may include a display module 100, a housing 300, and an acoustical generator 500.

The display module 100 may include a display panel 110, and a cover window 190.

The display panel 110 may be a light emitting display panel or a flexible light emitting display panel. The display panel 110 according to an exemplary embodiment may include a pixel array substrate having a pixel array including a plurality of pixels, and an encapsulation layer for encapsulating the pixel array.

Each of the plurality of pixels is provided in a pixel region defined by pixel drive lines. Each of the plurality of pixels may include a pixel circuit having at least two thin film transistors and at least one capacitor, and a light emitting element emitting light by a current supplied from the pixel circuit. As one example, the light emitting element may include an organic light emitting layer or a quantum dot light emitting layer. As another example, the light emitting device may include a micro light emitting diode.

The encapsulation layer protects the thin film transistor and the light emitting element from external impact and prevents moisture from penetrating into the light emitting element. And, the sealing layer may be replaced with an encapsulating substrate attached to the pixel array substrate via a filler material surrounding the pixel array. When the filling material is formed of a transparent filler, the sealing substrate may be a transparent sealing substrate.

The display module 100 according to an example of the present application may further include a touch panel 130. The touch panel 130 is provided on the display panel 110 and includes a touch electrode layer having a touch electrode for sensing a user's touch to the display module 100. The touch electrode layer senses the capacitance change of the touch electrode according to the user's touch. For example, the touch electrode layer includes a touch electrode for sensing user's touch according to mutual capacitance type or self-capacitance type.

The display module 100 according to an example of the present application may further include a polarizing film 150 disposed on the touch panel 130. [ The polarizing film 150 is attached to the upper surface of the touch panel 130 via a film attaching member. The polarizing film has a role of improving the visibility and the contrast ratio of the display panel 110 by changing the external light reflected by the thin film transistor and / or pixel driving lines provided on the pixel array substrate to a circularly polarized state. The polarizing film 150 may be disposed between the sealing layer of the display panel 110 and the touch panel 130.

The display module 100 may further include a barrier layer interposed between the sealing layer of the display panel 110 and the touch panel 130. The barrier layer may prevent water or the like from penetrating into the pixel array.

The display module 100 may further include a color filter layer provided on an upper surface of the sealing layer of the display panel 110. The color filter layer may include a color filter provided so as to overlap each of the plurality of pixels and transmitting only the wavelength of the color set in each of the plurality of pixels.

The cover window 190 is coupled to the housing 300 to support the display panel 110. For example, the cover window 190 may be supported on the housing 300 while supporting the display panel 110.

The cover window 190 according to one example may be made of glass or a reinforced glass material. For example, the cover window 190 may have either a sapphire glass or a Gorilla glass or a bonding structure thereof. The cover window 190 is attached (or laminated) to the front surface of the display panel 110 through the optical adhesive member 170 to thereby constitute the display module 100 together with the display panel 110. At this time, the optical adhesive member may be Optically Clear Adhesive (OCA), Optically Clear Resin (OCR), or Pressure Sensitive Adhesive (PSA).

The cover window 190 covers the remaining non-display area except for the display area of the display module 100. [ The cover window 190 according to an exemplary embodiment may include a transparent area overlapping a display area of the display module 100, a light shield area overlapping with a non-display area of the display module 100, And a design layer covering the non-display area.

The housing 300 surrounds the rear surface and the side surface of the display module 100 and applies compressive stress to the side surface of the display module 100. For example, the housing 300 encloses the rear and side surfaces of the display module 100 by housing the display module 100. Each side of the housing 300 may be rounded to have a constant radius of curvature for improved design aesthetics of the electronic device.

The housing 300 according to one example may include a housing bottom 310, and a housing side wall 330.

The housing bottom 310 is disposed on the rear surface of the display module 100 to cover the rear surface of the display module 100. Each corner portion of the housing bottom 310 may be rounded to have a constant radius of curvature to enhance the design aesthetics of the electronic device.

The housing side wall part 330 is formed in a frame shape so as to have a display accommodating space 300a in which the display module 100 is housed to enclose each side of the display module 100. The housing side wall portion 330 may be vertically connected to the respective outer side walls of the housing bottom portion 310. For example, the cross-section between the housing side wall portion 330 and each of the outer walls of the housing bottom portion 310 may have a cross-section of " 慣 " or "┣" shape depending on its cross-sectional position. The housing side wall part 330 is provided with a display storage space 300a for storing the display module 100 on the front surface of the housing bottom part 310, It is possible to provide a circuit storage space 300b for storing peripheral circuits of an electronic device including a battery and the like, and a circuit configuration such as a drive circuit portion.

The housing side wall portion 330 according to an example supports the sound generator 500 and acts as a pedestal when driving (or vibrating) the sound generator 500. The housing side wall portion 330 according to an example may include first to fourth housing side walls 331, 332, 333, and 334.

The first housing side wall 331 may be vertically coupled to the first edge of the housing bottom 310 to be perpendicular to the first longitudinal direction X of the electronic device or may be vertically coupled to the first side . For example, the first housing side wall 331 may be formed on the first side of the housing bottom 310 to surround the first long side of the display module 100.

The second housing side wall 332 may be vertically coupled to the second edge of the housing bottom 310 or may be perpendicularly coupled to the second side (or second long side) to be parallel to the first housing side wall 331 . For example, the second housing side wall 332 may be formed on the second side of the housing bottom 310 to surround the second long side of the display module 100.

The third housing side wall 333 is vertically coupled to the third edge of the housing bottom 310 so as to be parallel to the second longitudinal direction Y intersecting the first longitudinal direction X of the electronic device, (Or the first short side). For example, the third housing side wall 333 may be formed on the third side of the housing bottom 310 to surround the first short side of the display module 100.

The fourth housing side wall 334 may be vertically coupled to the fourth edge of the housing bottom 310 to be parallel to the third housing side wall 333 or perpendicularly coupled to the fourth side (or second short side) . For example, the fourth housing side wall 334 may be formed on the fourth side of the housing bottom 310 to surround the second short side of the display module 100.

332, 333, and 334 are connected to each other and each corner portion between the front and side surfaces of each of the first to fourth housing side walls 331, 332, 333, and 334, And each of the corner portions between the rear surface and the side surface of each of the first to fourth housing side walls 331, 332, 333, and 334 are rounded so as to have a certain radius of curvature .

The housing side wall 330 according to an exemplary embodiment of the present invention may further include an upper stepped portion 360.

The upper stepped portion 360 is provided along the inner surface of the uppermost surface of the housing side wall 330. For example, the upper step portion 360 is formed by removing the uppermost inner side edge portions of each of the third and fourth housing side walls 333 and 334 to a predetermined depth. The upper step portion 360 supports the display module 100.

The upper step 360 according to one example may include a support surface 361 and an inner wall 362.

The support surface 361 of the upper step portion 360 is provided to be stepped to a predetermined depth from the uppermost surface of each of the third and fourth housing side walls 333 and 334. This support surface 361 supports the rear edge of the cover window 190. At this time, a buffer member 200 made of a soft material may be interposed between the support surface 361 and the rear edge of the cover window 190. The buffer member 200 may include a double-sided tape or a foam pad. The buffer member 200 buffers the shock applied to the cover window 190, prevents vibration of the display module 100 from being transmitted to the housing 300, and enables vibration of the display module 100.

The inner side wall 362 of the upper step 360 is formed vertically between the uppermost surface of each of the third and fourth housing side walls 333 and 334 and the support surface 361. This inner wall 362 wraps the short side of the display module 100, i.e., the cover window 190, which is supported on the support surface 361 of the upper step 360.

The sound generator 500 vibrates the display module 100 to generate sound. The display module 100 outputs sound in the front direction by in-plane vibration according to the vibration of the sound generator 500. [ In other words, the display module 100 is placed in an in plane vibration mode according to the horizontal vibration (HDV) applied to the side directly from the sound generator 500, as shown in Fig. 5 So that the sound SW is output forward by oscillating in the vertical direction VD. At this time, the frequency of the high frequency band of the frequency of the sound generated according to the vibration of the display module 100 may mainly be generated at the edge portion of the display module 100. Accordingly, the sound generating device 500 according to the present example directly vibrates the side surface of the display module 100, thereby increasing the high frequency band characteristic of the sound generated according to the vibration of the display module 100.

The sound generating device 500 according to the present example may include at least one vibration generating module. For example, the sound generating device 500 may include a first vibration generating module 510 and a second vibration generating module 530.

The first vibration generating module 510 directly vibrates the first side of the display module 100, that is, the first long side. The first vibration generating module 510 may be disposed between the first housing side wall 331 of the housing side wall 330 and the first long side of the display module 100. The first vibration generating module 510 vibrates according to a vibration driving signal (or sound generating signal) supplied from the outside with the first housing side wall 331 as a pedestal, thereby vibrating the first long side of the display module 100 .

The first vibration generating module 510 according to an exemplary embodiment has a width (or height) corresponding to the height (or thickness) of the display module 100, 100). ≪ / RTI > For example, when the length of the long side of the display module 100 is assumed to be 100, the length of the first vibration generating module 510 may be set to 50 to 90%.

The first vibration generating module 510 may be attached to the inner wall 331a of the first housing side wall 331 via a first double-sided foam tape 610 having a predetermined elastic force. The first double-sided foam tape 610 according to one example may have the same size as the first vibration generating module 510. The first double-sided foam tape 610 enables the vibration of the first vibration generating module 510 and the vibration of the display module 100 so that the vibration of the first vibration generating module 510 is transmitted to the first housing side wall 331 ).

The second vibration generating module 530 directly vibrates the second side of the display module 100, that is, the second long side. The second vibration generating module 530 may be disposed between the second housing side wall 332 of the housing side wall 330 and the second long side of the display module 100. The second vibration generating module 530 vibrates according to a vibration driving signal supplied from the outside with the second housing side wall 332 as a pedestal, thereby vibrating the second long side of the display module 100.

The second vibration generating module 530 according to an exemplary embodiment has a width (or height) corresponding to the height (or thickness) of the display module 100, 100). ≪ / RTI > For example, when the length of the long side of the display module 100 is assumed to be 100, the length of the second vibration generating module 530 may be set to 50 to 90%.

The second vibration generating module 530 may be attached to the inner wall 332a of the second housing side wall 332 via a second double-sided foam tape 630 having a certain elastic force. The second double-sided foam tape 630 according to one example may have the same size as the second vibration generating module 530. This second double-sided foam tape 630 enables vibration of the second vibration generating module 530 and vibration of the display module 100 and vibration of the second vibration generating module 530 is applied to the second housing side wall 332 ).

Each of the first vibration generating module 510 and the second vibration generating module 530 according to an example may include a piezoelectric element that vibrates in the thickness direction by a vibration driving signal.

A piezoelectric device according to an example may include a piezoelectric material layer having a piezoelectric effect, a first electrode disposed on a front surface of the piezoelectric material layer, and a second electrode disposed on a rear surface of the piezoelectric material layer. For example, one of the first electrode and the second electrode of the piezoelectric element is coupled to the double-sided foam tapes 610 and 630, and the other one of the first electrode and the second electrode of the piezoelectric element is bonded May be coupled to the long side of the display module 100, that is, the long side of the cover window 190 via the member. The element bonding member may be a double-sided tape or a natural curable adhesive. At this time, the element bonding member may be made of a thermosetting adhesive or a photo-curable adhesive, but in this case, since the characteristics of the piezoelectric element may be deteriorated by the heat of the curing process of the adhesive, it may be made of a double-sided tape or a natural curable adhesive. The element bonding member according to one example may have higher rigidity than the double-sided foam tapes 610 and 630 in order to apply vibration to the long side of the cover window 190. [

The piezoelectric material layer includes a piezoelectric material that generates vibration by an electric field. Here, a piezoelectric material generates a potential difference due to dielectric polarization due to a relative positional change of positive (+) and negative (-) ions due to pressure or twist phenomenon in the crystal structure due to external force, And has a characteristic in which vibration is generated by an electric field.

The piezoelectric material layer according to an example may include a piezoelectric material of a polymer material, a piezoelectric material of a thin film material, a piezoelectric material of a composite material, or a piezoelectric material of a single crystal ceramic or a polycrystalline ceramic. The piezoelectric material of the polymeric material may comprise polyvinylidene difluoride (PVDF), P (VDF-TrFe), or P (VDFTeFE). The piezoelectric material of the thin film material may include ZnO, CdS, or AlN. The piezoelectric material of the composite material may include lead zirconate titanate (PZT) -PVDF, PZT-Silicon Rubber, PZT-Epoxy, PZT-foamed polymer, or PZT-foamed urethane. The piezoelectric ceramic material of the single crystal may include _{α-AlPO 4, α-SiO} 2, LiNbO 3, Tb 2 (MoO 4) 3, Li 2 B 4 O 7, or ZnO. The piezoelectric material of the polycrystalline ceramic may include a PZT system, a PT system, a PZT-Complex perovskite system, or BaTiO ₃ .

The first electrode and the second electrode are provided so as to overlap each other with a piezoelectric material layer therebetween. The first electrode and the second electrode may be made of an opaque metal material having a relatively low resistance and a good heat dissipation property. However, the first electrode and the second electrode may be made of a transparent conductive material or a conductive polymer material.

Since each of the first vibration generating module 510 and the second vibration generating module 530 according to the present example is made up of a piezoelectric element having a relatively small area, The frequency characteristic of the high frequency band of the sound generated according to the vibration and the sound pressure of the high frequency band can be increased. Here, the frequency of the high frequency band may be, for example, 3 kHz or higher, but is not limited thereto.

On the other hand, the sound generating device 500 according to the present example may be arranged to directly vibrate the short side instead of the long side of the display module 100. In this case, the horizontal vibration applied to the short side of the display module 100 acts in the direction of the long side of the display module 100, thereby increasing the frequency characteristics of the low frequency sound during the vibration of the display module 100. The acoustic-wave generating device 500 according to the present example may include only one of the first vibration-generating module 510 and the second vibration-generating module 530 according to the acoustic output characteristics of the electronic device.

The electronic apparatus according to an example of the present application may further include a driving circuit unit 700 and a rear cover 900.

The driving circuit unit 700 is disposed in a circuit storage space 300b provided in the housing 300 and is electrically connected to the display panel 110 and the sound generator 500, respectively. The driving circuit unit 700 may include a panel driving circuit and a sound processing circuit.

The panel driving circuit is mounted on the display panel 110 or the circuit board to display an image on the display panel 110. The panel driving circuit is connected to a pad portion provided on the pixel array substrate of the display panel 110 and displays an image on each pixel by supplying a driving signal and a data signal to the pixel driving lines.

The sound processing circuit generates an audio signal based on the audio source, amplifies the audio signal to generate a vibration driving signal, and vibrates the sound generating device 500 according to the generated vibration driving signal.

The rear cover 900 is coupled to the housing 300 to cover the rear surface of the housing 300. For example, the rear cover 900 covers a circuit receiving space provided on the rear surface of the housing 300. [

The rear cover 900 may be coupled to the lower stepped portion 370 provided on the housing side wall 330 of the housing 300. For example, the rear cover 900 may be made of the same material as the cover window 190, or may be made of a glass material different from the cover window 190.

In this way, the electronic apparatus according to an embodiment of the present invention can output the sound generated by the in-plane vibration of the display module 100 according to the driving of the sound generator 500 toward the front direction of the display module 100 , The high frequency band frequency characteristic of the sound generated according to the vibration of the display module 100 can be improved.

FIG. 6 is another cross-sectional view of the line I-I 'shown in FIG. 1, which is constructed by modifying the display module shown in FIG. 2 to FIG. Accordingly, only the display module and the related configuration will be described in the following description, and a duplicate description of the same configuration will be omitted.

Referring to FIG. 6 with reference to FIG. 1, the display module 100 according to the present example may include a display panel 110, a backlight unit 120, and a cover window 190.

The display panel 110 may be a liquid crystal display panel or a flexible liquid crystal display panel. The display panel 110 according to an exemplary embodiment includes a lower substrate 111 and an upper substrate 113 which are adhered to each other with a liquid crystal layer sandwiched therebetween.

The lower substrate 111 is a thin film transistor array substrate and includes a pixel array portion having a plurality of pixels formed in each pixel region defined by a plurality of gate lines and a plurality of data lines. Each of the plurality of pixels includes a thin film transistor connected to the gate line and the data line, a pixel electrode connected to the thin film transistor, and a common electrode formed adjacent to the pixel electrode and supplied with a common voltage.

The lower substrate 111 includes a pad portion provided on the first edge and a gate driving circuit provided on the second edge.

The pad unit supplies a signal supplied from the outside to the pixel array unit and the gate driving circuit. For example, the pad portion may include a plurality of data pads connected to a plurality of data lines through a plurality of data link lines, and a plurality of gate pads connected to the gate driving circuit through gate control signal lines.

The gate driving circuit may be embedded (or integrated) at the first edge of the lower substrate 110 so as to be connected one to one with a plurality of gate lines. In this case, the gate drive driving circuit may be a shift register including a transistor formed by the same process as the thin film transistor provided in the pixel region.

The upper substrate 113 is a color filter array substrate. The upper substrate 113 includes a black matrix defining an aperture region overlapping each pixel region formed in the lower substrate 111, and a color filter formed in the aperture region. The upper substrate 113 is adhered to the lower substrate 111 with a liquid crystal layer interposed therebetween by a sealant.

The liquid crystal layer is sandwiched between the lower substrate 111 and the upper substrate 113. The liquid crystal molecules are aligned with the liquid crystal molecules according to an electric field formed by a data voltage applied to a pixel electrode provided in each pixel and a common voltage applied to a common electrode, And a liquid crystal in which the arrangement direction is changed.

The display panel 110 according to an example further includes a lower polarizing member 115 and an upper polarizing member 117.

The lower polarizing member 115 is attached to the rear surface of the lower substrate 111 to polarize light emitted from the backlight unit 120 toward the lower substrate 111 to a first polarization axis.

The upper polarizing member 117 is attached to the front surface of the upper substrate 113 to polarize the light transmitted through the upper substrate 113 and emitted to the outside to a second polarizing axis different from the first polarizing axis.

The display panel 110 displays an image using light transmitted through the liquid crystal layer by driving the liquid crystal layer according to an electric field formed for each pixel by a data voltage and a common voltage applied to each pixel.

The backlight unit 120 according to an exemplary embodiment includes a light guide member 121, a light source module, a reflection plate 123, an optical sheet portion 125, and a backlight support member 127.

The light guide member 121 is disposed on the rear surface of the display panel 110 with the light incident surface. The light guide member 121 changes the traveling direction of light incident from the light source module through the light incident surface to the display panel 110 side.

The light source module irradiates light onto a light incident surface provided on the light guide member 121. The light source module according to an example may include a plurality of light emitting diode elements mounted on a printed circuit board for a light source and irradiating light to the light entrance surface of the light guide member 121.

The reflection plate 123 is disposed under the rear surface of the light guide member 121 and is supported by the backlight support member 300. The reflection plate 123 can minimize or prevent the back light leakage of the light guide member 121 by reflecting light incident through the rear surface of the light guide member 121 toward the inside of the light guide member 121.

Alternatively, the reflection plate 123 may include first to fourth wings covering the first to third sides except for the light incidence surface of the light guide member 121. The first to fourth wings may extend from the first to third sides so as to have a length corresponding to the thickness of the light guide member 121 and may be formed to cover each of the first to third sides of the light guide member 121 Respectively.

The optical sheet portion 125 is disposed on the front surface of the light guide member 121. That is, the optical sheet portion 125 may be laminated between the rear surface of the display panel 110 and the light guide member 121. The optical sheet portion 125 improves the brightness characteristic of the light emitted from the light guide member 121. The optical sheet part 125 according to an example may be a composite optical sheet having both a function of diffusing incident light and a function of condensing diffused light.

The uppermost sheet of the optical sheet part 125 may face the rear surface of the display panel 110 with an air gap therebetween. The air gap may serve to provide a vibration space of the display panel 110.

The backlight support member 127 is coupled to the rear edge of the display panel 110 and is coupled to the front edge of the reflection plate 123. That is, the backlight support member 127 may be interposed between the rear edge of the display panel 110 and the front edge of the reflection plate 123 so as to surround the side surface of the backlight unit 120.

The upper surface of the backlight support member 127 according to an exemplary embodiment may be coupled with the lower substrate 111 or the lower polarizer 115 of the display panel 110, Or may be coupled with the rear surface of the lower substrate 111 to improve adhesion with the display panel 110. [ The lower surface of the backlight support member 127 may be engaged with the front edge of the reflection plate 123. [

The backlight support member 127 may include an acrylic-based material or a urethane-based material, and may include a foam pad and an adhesive layer disposed on each of the front and back surfaces of the foam pad. Here, the acrylic-based material has a relatively high adhesive strength and a high hardness, and the urethane-based material can have a relatively excellent light-shielding property. Since the backlight support member 127 surrounds the side surface of the backlight unit 120, it is preferable that the backlight support member 127 is made of a urethane-based material in order to prevent side light leakage of the backlight unit 120.

The cover window 190 is coupled to the housing 300 to support the display panel 110. That is, the cover window 190 is attached (or laminated) to the front surface of the display panel 110 via the optical adhesive member 170, which is the same as the cover window shown in Figs. 2 to 5 , And the same reference numerals are given thereto, and redundant description thereof will be omitted.

The electronic device according to this embodiment can output sound generated by the in-plane vibration of the display module 100 according to the driving of the sound generator 500 to the front direction of the display module 100, The high frequency band frequency characteristic of the sound generated according to the vibration of the speaker 100 can be improved. Particularly, the electronic apparatus according to the present example is configured such that the vibration of the sound generating device 500 is directly applied to the side of the display module 100, that is, the cover window 190, so that the gap between the display panel 110 and the backlight unit 120 The sound can be output without loss of sound pressure due to the air gap.

FIG. 7 is another cross-sectional view of the line I-I 'shown in FIG. 1, and FIG. 8 is a perspective view showing the housing shown in FIG. 7, which is constructed by changing the sound generating device shown in FIGS. 2 to 5 . Accordingly, only the sound generating apparatus and the related configuration will be described in the following description, and redundant description of the same configuration will be omitted.

7 and 8, the sound generating device 500 of the electronic device according to the present example vibrates the display module 100 in-plane by directly oscillating the side surface of the display module using a vibration transmission mechanism .

The sound generating device 500 according to the present example may include a first vibration generating module 550 and a second vibration generating module 570.

The first vibration generating module 550 directly vibrates the first side of the display module 100, i.e., the first long side. The second vibration generating module 570 directly vibrates the second side of the display module 100, i.e., the second long side. That is, each of the first vibration generating module 550 and the second vibration generating module 570 vibrates the long side of the cover window 190 so that sound is output according to the in-plane vibration of the display module 100.

The first vibration generating module 550 according to an example may include a piezoelectric element 551, and a vibration transmitting mechanism.

The piezoelectric element 551 includes a piezoelectric material layer having a piezoelectric effect, a first electrode disposed on a front surface of the piezoelectric material layer, and a second electrode disposed on a rear surface of the piezoelectric material layer, And thus a duplicate description thereof will be omitted.

The piezoelectric element 551 according to one example vibrates in a direction parallel to the in-plane vibration direction of the display module 100. [ That is, the front surface and the rear surface of the piezoelectric element 551 are perpendicular to the second longitudinal direction Y of the electronic device, and the first housing side wall 331 of the housing 300 and the second housing side wall Are disposed on the rear surface of the display module 100 so as to adjoin each of the display panels 332. The piezoelectric element 551 vibrates according to the vibration driving signal and vibrates along the second longitudinal direction Y of the electronic apparatus to vibrate the vibration transmission mechanism.

The piezoelectric element 551 according to one example can be coupled to the vibration transmission mechanism via the element bonding member 552 in a state where the front surface and the rear surface are vertically erected.

The vibration transmission mechanism transmits the vibration of the piezoelectric element 551 to the side surface of the display module 100. The vibration transmission mechanism according to one example may include a support bracket 553, a vibration transmission member 555, and a panel vibration member 557.

The support bracket 553 is disposed in parallel with the vertical direction Z to support the piezoelectric element 551. The support bracket 553 is coupled to the front surface of the piezoelectric element 551 through the element bonding member 552. The support bracket 553 according to an exemplary embodiment may have the same or larger size as the piezoelectric element 551, and may have a plate shape in which the front surface and the rear surface are vertically erected. For example, the front surface of the support bracket 553 may be coupled to the front surface of the piezoelectric element 551 via the element bonding member 552. [

The vibration transmitting member 555 is disposed in parallel with the horizontal direction Y and connected to the support bracket 551 to support the support bracket 551. The vibration transmitting member 555 may be coupled to the rear center portion of the support bracket 553, but is not limited thereto. The vibration transmitting member 555 according to an exemplary embodiment may have a plate shape having a predetermined width and elongated along the second longitudinal direction Y. [ For example, the one short side of the vibration transmitting member 555 may be coupled to the rear center portion of the support bracket 553. A vibration transmission member (555) and support bracket (553) coupled to each other may have a "┤" shaped cross section.

The panel vibrating member 557 is disposed in parallel with the vertical direction Z and is coupled to the first side (or the first long side) of the display module 100 and is connected to the vibration transmitting member 555. The panel vibrating member 557 according to an exemplary embodiment may have a plate shape having a predetermined width and elongated along the vertical direction Z. For example, the panel oscillating member 557 may be vertically bent from the other end of the oscillation transmitting member 555. Interconnecting panel vibration member 557 and the vibration transmission member 555 may have a "└" shaped cross section.

The back surface of the panel vibration member 557 according to an example can be attached to the inner wall 331c of the first housing side wall 331 via the first double-sided foam tape 610 having a certain elastic force. The housing side wall 331 is recessed from the inner side wall of the first housing side wall 331 and has a first insertion groove 331b in which the panel vibration member 557 and the first double-sided foam tape 610 are inserted, . ≪ / RTI >

The front surface of the panel vibrating member 557 according to one example can be coupled to the first side of the display module 100, that is, the first long side of the cover window 190, via the mechanism engaging member. The mechanism engaging member can have a relatively high rigidity in order to transmit the vibration of the panel vibrating member 557 to the long side of the cover window 190. [

The first vibration generating module 550 can transmit the horizontal vibration of the piezoelectric element 551 through the vibration transmitting mechanism including the supporting bracket 553, the vibration transmitting member 555 and the panel vibrating member 557, To the first side of the module 100, i.e., to the first long side of the cover window 190. Accordingly, the first long side of the cover window 190 is oscillated in the horizontal direction (or the short side direction) by interlocking with the horizontal direction vibration of the piezoelectric element 551.

The second vibration generating module 570 according to one example may include a piezoelectric element 551, and a vibration transmitting mechanism. Since the piezoelectric element 551 of the second vibration generating module 570 and the vibration transmitting mechanism are disposed so as to have a symmetrical structure with respect to the first vibration generating module 570 with respect to the center of the short side of the display module 100, The duplicate explanation for the above will be omitted. The second vibration generating module 570 vibrates the horizontal vibration of the piezoelectric element 551 through the vibration transmitting mechanism including the supporting bracket 553, the vibration transmitting member 555 and the panel vibrating member 557, 100, that is, the second long side of the cover window 190. As shown in FIG. The second long side of the cover window 190 is oscillated in the horizontal direction (or the short side direction) interlocked with the horizontal direction vibration of the piezoelectric element 551. [

In the electronic apparatus according to the present embodiment, the housing 300 may further include a first element support 351 and a second element support 353.

The first element support 351 is vertically formed from the housing bottom 330 so as to be parallel to the piezoelectric element 551 of the first vibration generating module 550. The first element support 351 serves as a pedestal for supporting the piezoelectric element 551 of the first vibration generating module 550 so that the vibration of the piezoelectric element 551 of the first vibration generating module 550 can be vibrated And is transmitted to the first long side of the cover window (190) through the transmission mechanism.

The second element support 353 is vertically formed from the housing bottom 330 so as to be parallel to the piezoelectric element 551 of the second vibration generating module 570. The second element support 353 serves as a pedestal supporting the piezoelectric element 551 of the second vibration generating module 570 so that the vibration of the piezoelectric element 551 of the second vibration generating module 570 can be vibrated To be transmitted to the second long side of the cover window (190) through the transmission mechanism.

The electronic apparatus according to the present embodiment is configured such that the vibration of the piezoelectric element 551 is transmitted to the side surface of the display module 100 through the vibration transmission mechanism so that the sound generated by the in- 100, and the high frequency band characteristics of the sound generated according to the vibration of the display module 100 can be improved. Particularly, in the electronic device according to this example, since the piezoelectric element 551 is disposed on the rear surface of the display module 100, the arrangement and configuration of the piezoelectric element 551 can be facilitated and the piezoelectric element 551 can be mounted on the display module 100, the display module 100 can be vibrated in-plane.

On the other hand, the sound generating device 500 according to the present example may be arranged to vibrate the short side instead of the long side of the display module 100. In this case, the horizontal vibration applied to the short side of the display module 100 acts in the direction of the long side of the display module 100, thereby improving the frequency characteristics of the low frequency sound during the vibration of the display module 100. The acoustic-wave generating device 500 according to the present embodiment may include only one of the first vibration-generating module 550 and the second vibration-generating module 570 according to the acoustic output characteristics of the electronic device.

In the electronic device according to this example, the display module 100 can be changed to the display module shown in Fig. 6, in which the display module 100 uses the light emitted from the backlight unit to the display panel And can output sound by vibrating due to the vibration transmitted to the side surface of the cover window according to driving of the sound generator.

9 is an exploded perspective view showing the sound generating device shown in Fig. 9, and Fig. 11 is an exploded perspective view showing the sound generating device shown in Fig. 9, FIG. 7 is a view showing a process of converting a vertical vibration motion of a piezoelectric element into a horizontal vibration motion by using the sound generating device shown in FIG. 7 and FIG. Accordingly, only the sound generating apparatus and the related configuration will be described in the following description, and redundant description of the same configuration will be omitted.

9 to 11, the sound generating device 500 of the electronic device according to the present example vibrates the display module 100 in-plane by directly vibrating the side surface of the display module using the vibration transmission mechanism .

The sound generating device 500 according to the present example may include a first vibration generating module 580 and a second vibration generating module 590.

The first vibration generating module 580 directly vibrates the first side of the display module 100, i.e., the first long side. The second vibration generating module 590 directly vibrates the second side of the display module 100, i.e., the second long side. That is, each of the first vibration generating module 580 and the second vibration generating module 590 vibrates the long side of the cover window 190 so that sound is output according to the in-plane vibration of the display module 100.

The first vibration generating module 580 according to an example may include a piezoelectric element 551, and a vibration transmitting mechanism.

The piezoelectric element 581 includes a piezoelectric material layer having a piezoelectric effect, a first electrode disposed on a front surface of the piezoelectric material layer, and a second electrode disposed on a rear surface of the piezoelectric material layer, And thus a duplicate description thereof will be omitted.

The piezoelectric element 581 according to an example vibrates in a direction perpendicular to the in-plane vibration direction of the display module 100. [ That is, the piezoelectric element 581 is arranged horizontally so that the thickness direction thereof is parallel to the thickness direction Z (or vertical direction) of the electronic apparatus, and the first housing side wall 331 and the second housing side wall And is disposed on the rear surface of the display module 100 so as to be adjacent to each of the housing side walls 332. The piezoelectric element 581 vibrates according to the vibration driving signal and vibrates up and down along the thickness direction Z (or vertical direction) of the electronic apparatus to vibrate the vibration transmission mechanism.

The piezoelectric element 551 according to an example may be coupled to the vibration transmission mechanism via the element bonding member 582 in a state in which the front surface and the rear surface are arranged to be parallel to the rear surface of the display module 100.

The vibration transmission mechanism converts the vertical vibration (or vertical vibration) of the piezoelectric element 581 into a horizontal vibration to transmit the vibration to the side of the display module 100. The vibration transmission mechanism according to one example includes a frame 583, a support bracket 584, a vertically movable member 585, a motion switching member 586, a horizontal moving member 587, a vibration transmitting member 588, Member 589 as shown in FIG.

The frame 583 constitutes the body of the vibration transmission mechanism and includes a support bracket 584, a vertically movable member 585, a motion switching member 586, a horizontal movement member 587, and a vibration transmission member 588 And guides the movement of the vertically movable member 585 and the horizontal movable member 587, respectively. The frame 583 according to one example includes first to fourth sidewall frames 583a, 583b, 583c and 583d, an opening, a pair of vertical guide holes 583a1 and a pair of horizontal guide holes 583a2 .

The frame 583 may include first to fourth sidewall frames 583a, 583b, 583c and 583d, an opening, a pair of vertical guide holes 583a1, and a pair of horizontal guide holes 583a2 .

The first to fourth sidewall frames 583a, 583b, 583c, and 583d may be coupled to each other so that one side wall and the upper side wall have an opened box shape. For example, the first and second sidewall frames 583a and 583b are disposed side by side along the second longitudinal direction Y of the electronic device. The third frame side wall 583c is disposed between the first longitudinal direction X of the electronic device and one side of the first and second side wall frames 583a and 583b. The fourth frame side wall 583d supports the first to third frame side walls 583a, 583b and 583c as a bottom frame. For example, each of the first to third frame sidewalls 583a, 583b, 583c is fixed to the other side except for one side (or one side) of the fourth frame side wall 583d by fastening means such as a plurality of screws or bolts, Lt; / RTI > Meanwhile, the frame 583 may further include a fifth frame sidewall disposed in parallel with the third frame sidewall 583c and coupled between the other side of the first and second sidewall frames 583a and 583b.

The opening may be provided on one side and the upper side of the frame 583 and only on the upper side of the frame 583 when the frame 583 includes the second frame side wall.

The pair of vertical guide holes 583a1 penetrate the first and second sidewall frames 583a and 583b in the first longitudinal direction X of the electronic apparatus and extend along the thickness direction Z of the electronic apparatus Length, and may have a rectangular shape with rounded ends. Such a pair of vertical guide holes 583a1 may be represented by a vertical guide slit.

The pair of horizontal guide holes 583a2 penetrate the first and second sidewall frames 583a and 583b in the first longitudinal direction X of the electronic apparatus and extend in the second longitudinal direction Y of the electronic apparatus And may have a rectangular shape with rounded ends at both ends. Such a pair of horizontal guide holes 583a2 may be expressed as a horizontal guide slit.

The support bracket 584 supports the piezoelectric element 581 and moves up and down according to the vibration of the piezoelectric element 581. The support bracket 584 is coupled to the front surface of the piezoelectric element 581 via the element bonding member 582. [ At this time, the support bracket 584 may have the same or larger size as the piezoelectric element 581, and may have a plate shape in which the front surface and the rear surface are parallel to the second longitudinal direction Y of the electronic device. For example, the support bracket 584 may have a " horn "shaped cross-section.

The vertical moving member 585 is movably installed in a pair of vertical guide holes 583a1 provided in the frame 583 and supports the support bracket 584. The vertically movable member 585 according to one example may be a vertical movement axis. A bearing may be interposed between the vertically-moving member 585 and the support bracket 584. The vertically movable member 585 moves (or vibrates) vertically (or vertically) in accordance with the vertical movement guide of the pair of vertical guide holes 583a1 when the piezoelectric element 581 vibrates.

The motion converting member 586 is rotatably connected to the vertically moving member 585 and horizontally moves while rotating in the direction of the vertical movement of the vertically moving member 585. That is, the motion converting member 586 converts the vertical vibration motion (VVM) of the piezoelectric element 581 into the horizontal vibration motion (HVM). A bearing may be interposed between one end of the motion switching member 586 and the vertically movable member 585.

The horizontal moving member 587 is movably installed in a pair of horizontal guide holes 583a2 provided in the frame 583 and rotatably connected to the other end of the movement switching member 586. [ The horizontal moving member 587 according to an example may be a horizontal moving axis. A bearing may be interposed between the horizontally moving member 587 and the other end of the motion switching member 586. The horizontal moving member 587 is moved horizontally along the horizontal movement guide of the pair of horizontal guide holes 583a2 during the rotation of the motion switching member 586 and the horizontal vibration movement HVM in accordance with the vibration of the piezoelectric element 581 (Or vibrated) in the left or right direction.

The vibration transmitting member 588 is disposed in parallel with the horizontal direction and is rotatably connected to the horizontal moving member 587 and moves in the horizontal (or left and right) direction along with the horizontal movement of the horizontal moving member 587 Or vibration). The vibration transmitting member 588 according to an exemplary embodiment may have a plate shape having a predetermined width and elongated along the second longitudinal direction Y. [ For example, one end of the vibration transmitting member 588 is rotatably connected to the horizontal moving member 587. At this time, a bearing may be interposed between one end of the vibration transmitting member 588 and the horizontal moving member 587.

The panel oscillating member 589 is arranged in parallel with the vertical direction Z and is coupled to the first side (or first long side) of the display module 100 and to the vibration transmitting member 588. The panel vibration member 589 according to an exemplary embodiment may have a plate shape having a predetermined width and elongated along the vertical direction Z. For example, the panel vibration member 589 may be vertically bent from the other end of the vibration transmission member 588. [ Interconnecting panel vibration member (589) and a vibration transmitting member (588) may have a "└" shaped cross section.

The back surface of the panel vibration member 589 according to an example can be attached to the inner wall 331c of the first housing side wall 331 via the first double-sided foam tape 610 having a certain elastic force. The housing side wall 331 is recessed from the inner side wall of the first housing side wall 331 and has a first insertion groove 331b in which the panel vibration member 557 and the first double-sided foam tape 610 are inserted, . ≪ / RTI >

The front surface of the panel vibrating member 557 according to one example can be coupled to the first side of the display module 100, that is, the first long side of the cover window 190, via the mechanism engaging member. The mechanism engaging member can have a relatively high rigidity in order to transmit the vibration of the panel vibrating member 557 to the long side of the cover window 190. [

The first vibration generating module 580 converts the vertical vibration motion (VVM) of the piezoelectric element 581 into the horizontal vibration motion (HVM) through the vibration transmission mechanism including the motion switching member 586, To the first side of the cover window (100), i.e., to the first long side of the cover window (190). The first long side of the cover window 190 vibrates in the horizontal direction (or the short side direction) according to the horizontal vibration motion (HVM) converted from the vertical vibration motion (VVM) of the piezoelectric element 581.

The second vibration generating module 590 according to an example includes a frame 583, a support bracket 584, a vertically moving member 585, a motion switching member 586, a horizontal moving member 587, a vibration transmitting member 588 , And a panel vibration member 589. [ Since the second vibration generating module 590 having such a configuration is arranged to have a symmetrical structure with respect to the first vibration generating module 580 on the basis of the central portion of the short side of the display module 100, . The second vibration generating module 590 converts the vertical vibration motion VVM of the piezoelectric element 581 into the horizontal vibration motion HVM through the vibration transmitting mechanism including the motion converting member 586, To the second long side of the cover window 190, as shown in Fig. The second long side of the cover window 190 vibrates in the horizontal direction (or short side direction) in accordance with the horizontal vibration motion (HVM) converted from the vertical vibration motion (VVM) of the piezoelectric element 581.

In the electronic device according to this embodiment, the vertical vibration motion (VVM) of the piezoelectric element 581 is converted into the horizontal vibration motion (HVM) by the vibration transmission mechanism including the motion switching member 586, ) Of the display module 100 to output the sound generated by the in-plane vibration of the display module 100 to the front direction of the display module 100. The high frequency band characteristics of the sound generated by the vibration of the display module 100 Can be improved. Particularly, in the electronic device according to the present embodiment, since the piezoelectric element 551 is horizontally disposed on the rear surface of the display module 100, the piezoelectric element 551 can be easily arranged and configured, , The display module 100 can be vibrated in-plane even if the piezoelectric element 551 is disposed on the rear surface of the display module 100. [

On the other hand, the sound generating device 500 according to the present example may be arranged to vibrate the short side instead of the long side of the display module 100. In this case, the horizontal vibration applied to the short side of the display module 100 acts in the direction of the long side of the display module 100, thereby increasing the frequency characteristics of the low frequency sound during the vibration of the display module 100. The acoustic-wave generating device 500 according to the present embodiment may include only one of the first vibration-generating module 580 and the second vibration-generating module 590 according to the acoustic output characteristics of the electronic device.

In the electronic device according to this example, the display module 100 can be changed to the display module shown in Fig. 6, in which the display module 100 uses the light emitted from the backlight unit to the display panel And can output sound by vibrating due to the vibration transmitted to the side surface of the cover window according to driving of the sound generator.

12 is a graph showing acoustic output characteristics of an electronic device according to an example of the present application and a comparative example. In FIG. 12, thick solid lines show the acoustic output characteristics of the electronic device according to one example of the present application shown in FIGS. 1 to 5, and thin solid lines show the acoustic output characteristics of the display module (Out plane vibration mode) of the electronic device according to the comparative example. 12, the horizontal axis represents the frequency (Hz), and the vertical axis represents the sound pressure level (dB). Here, the acoustic output characteristic can be measured by the acoustic analysis equipment.

Referring to FIG. 12, it can be seen that the electronic apparatus according to the present application having the in-plane vibration mode has an acoustic frequency characteristic similar to that of the electronic apparatus according to the comparative example having the out-of-plane vibration mode. Particularly, It can be confirmed that it has a relatively high sound pressure, and it can be confirmed that it has improved sound pressure characteristics in a high frequency range of 3 kHz or more.

Meanwhile, the electronic device according to an exemplary embodiment of the present invention may be applied to a mobile device, a video phone, a smart watch, a watch phone, a wearable device, a foldable device, a rollable device, a bendable device, a flexible device, a curved device, an electronic organizer, an electronic book, a portable multimedia player (PMP), a personal digital assistant (PDA) Mobile medical devices, desktop PCs, laptop PCs, netbook computers, workstations, navigation, automotive navigation, vehicle displays, televisions, wall paper displays, A notebook, a monitor, a camera, a camcorder, a home appliance, and the like.

The features, structures, effects and the like described in the above-mentioned examples of the present application are included in at least one example of the present application and are not necessarily limited to one example. Further, the features, structures, effects, and the like illustrated in at least one of the examples of the present application can be combined and modified by other persons having ordinary skill in the art to which the present invention belongs. Accordingly, all such combinations and modifications are to be construed as being included within the scope of the present application.

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 invention. Will be clear to those who have knowledge of. Therefore, the scope of the present application is to be defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present application.

100: display module 110: display panel
120: backlight unit 190: cover window
200: buffer member 300: housing
310: housing bottom part 330: housing side wall part
500: sound generating device 510, 550, 580: first vibration generating module
530, 570, 590: second vibration generating module 551, 581: piezoelectric element
553, 584: Support brackets 555, 588: Vibration transmission member
557, 589: panel vibration member 583: frame
584: support bracket 585: vertically movable member
586: Motion converting member 587: Horizontal moving member

Claims (13)

A display module for displaying an image;
A housing for supporting the display module; And
And an acoustic generator for vibrating the display module,
Wherein the display module oscillates in-plane according to the vibration of the sound generator to output sound. The method according to claim 1,
Wherein the sound generating device directly vibrates the side surface of the display module. 3. The method of claim 2,
The housing includes:
A housing bottom portion covering a rear surface of the display module; And
And a housing side wall portion coupled to the bottom portion of the housing to surround the side surface of the display module,
Wherein the sound generating device includes a vibration element disposed between a side surface of the display module and the side wall portion of the housing. The method of claim 3,
Wherein the sound generating device includes at least one vibration generating module,
Wherein the at least one vibration generating module comprises:
A piezoelectric element disposed on a rear surface of the display module; And
And a vibration transmission mechanism for transmitting the vibration of the piezoelectric element to a side surface of the display module. 5. The method of claim 4,
Wherein the piezoelectric element vibrates in a direction parallel to an in-plane vibration direction of the display module. 6. The method of claim 5,
Wherein the vibration transmission mechanism comprises:
A supporting bracket disposed in parallel with the vertical direction to support the piezoelectric element;
A vibration transmitting member disposed parallel to the horizontal direction and connected to the support bracket; And
And a panel oscillating member disposed in parallel with the vertical direction and coupled to the side surface of the display module and connected to the oscillation transmitting member. The method according to claim 6,
The housing includes:
A housing bottom portion covering a rear surface of the display module;
A housing side wall portion coupled to the bottom portion of the housing to surround a side surface of the display module; And
And an element support formed on the bottom of the housing so as to be parallel to the piezoelectric element and supporting the piezoelectric element. 5. The method of claim 4,
The vibration element vibrates in a vertical direction parallel to the thickness direction of the display module,
Wherein the vibration transmission mechanism switches the vertical vibration of the vibration element to a lateral direction of the display module. 9. The method of claim 8,
Wherein the vibration transmission mechanism comprises:
A frame having an opening, a pair of horizontal guide holes and a pair of vertical guide holes;
A supporting bracket for supporting the piezoelectric element;
A vertical moving member installed between the pair of vertical guide holes and rotatably supporting the support bracket;
A motion converting member rotatably connected to the vertically-moving member and horizontally moving while rotating in accordance with vertical movement of the vertically-moving member;
A horizontal moving member installed between the pair of horizontal guide holes and rotatably supporting the motion switching member;
A vibration transmitting member arranged parallel to the horizontal direction and rotatably connected to the horizontally moving member; And
And a panel oscillating member disposed in parallel with the vertical direction and coupled to the side surface of the display module and connected to the oscillation transmitting member through the opening. 10. The method of claim 9,
And a horizontal extension line extending from the central portion of the horizontal guide hole along the horizontal direction crosses a vertical extension line extending the central portion of the vertical guide hole along the vertical direction. 11. The method according to any one of claims 1 to 10,
The display module includes:
A cover window supported on the housing; And
And a display panel coupled to a rear surface of the cover window,
Wherein the sound generator vibrates the side of the cover window. 12. The method of claim 11,
Wherein the sound generator vibrates the long side or the short side of the cover window. 12. The method of claim 11,
Wherein the display module further comprises a backlight unit coupled to a rear surface of the display panel.

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