KR102495570B1 - Electronic apparatus - Google Patents

Abstract

The present application provides an electronic device capable of lightening and slimming and outputting sound to the front of a display panel through vibration of a display module. A rear cover covering the rear surface, a first vibration generating device for vibrating the display module, and a second vibration generating device for vibrating the rear cover, wherein the area of the first vibration generating device is smaller than that of the second vibration generating device.

Description

Electronic equipment {ELECTRONIC APPARATUS}

This application relates to electronic devices.

In general, electronic devices such as televisions, monitors, notebook computers, smart phones, tablet computers, electronic pads, wearable devices, watch phones, portable information devices, navigation devices, or vehicle control display devices are display devices for displaying images and images. and a sound device for outputting sound related to the sound.

Recent electronic devices tend to have enlarged screens, while demands for light weight and slimming are increasing.

However, it is difficult to reduce the weight and size of the electronic device because it must have a sufficient space for embedding an acoustic device such as a speaker for sound output. Also, since the sound generated by the sound device built into the electronic device is output toward the back or side of the electronic device body rather than the front of the display panel, do not proceed toward the viewer (or user) watching the video from the front of the display panel. Therefore, there is a problem in that the immersion of the viewer watching the video is disturbed.

A technical problem of the present application is to provide an electronic device capable of lightening and slimming and outputting sound to the front of a display panel through vibration of a display module.

An electronic device according to the present application includes a display module displaying an image, a housing surrounding the side and rear surface of the display module, a rear cover covering the rear surface of the display module, a first vibration generating device for vibrating the display module, and vibrating the rear cover. and a second vibration generating device.

The present application can make electronic devices lighter and slimmer by outputting sound to the front of the display panel through vibration of the display module.

In addition, the present application may control vibration generated on the rear surface of the electronic device through the first vibration generating device and the second vibration generating device.

In addition, the present application may implement a two-way speaker outputting sound from the front and rear surfaces of the electronic device through the first vibration generating device and the second vibration generating device.

In addition to the effects of the present application mentioned above, other features and advantages of the present application will be described below, or will be clearly understood by those skilled in the art from such description and description.

1 is a cross-sectional view of an electronic device according to a first embodiment of the present application.
FIG. 2 shows how vibration is transmitted in FIG. 1 .
FIG. 3 is a graph showing waveforms of V2, V3, and V4 in FIG. 2;
4 is a cross-sectional view of an electronic device according to a second embodiment of the present application.

Advantages and features of the present application, and methods of achieving them, will become clear with reference to examples described below in detail in conjunction with the accompanying drawings. However, the present application is not limited to the examples disclosed below and will be implemented in a variety of different forms, only examples of the present application make the disclosure of the present application complete, and common knowledge in the art to which this application belongs It is provided to fully inform the person who has the scope of the invention, and this application is only defined by the scope of the claims.

Since the shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining an example of the present application are exemplary, the present application is not limited to the matters shown. Like reference numbers designate like elements throughout the specification. In addition, in describing the present application, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present application, the detailed description will be omitted.

When 'includes', 'has', 'consists', etc. mentioned in this specification is used, other parts may be added unless 'only' is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

In interpreting the components, even if there is no separate explicit description, it is interpreted as including the error range.

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless 'directly' is used, one or more other parts may be located between the two parts.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal precedence relationship is described in terms of 'after', 'following', 'next to', 'before', etc. It also includes non-continuous cases unless used.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first element mentioned below may be the second element within the technical spirit of the present application.

"First horizontal axis direction", "second horizontal axis direction", and "vertical axis direction" should not be interpreted only as a geometric relationship in which the relationship between each other is vertical, and the range in which the configuration of the present application can function functionally It can mean having a wider direction than within.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, "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, respectively, but also two of the first item, the second item, and the third item. It may mean a combination of all items that can be presented from one or more.

Each feature of the various examples of the present application can be partially or entirely combined or combined with each other, technically various interlocking and driving are possible, and each example can be implemented independently of each other or can be implemented together in a related relationship. .

Hereinafter, a preferred example of an electronic device according to the present application will be described in detail with reference to the accompanying drawings. In adding reference numerals to components of each drawing, the same components may have the same numerals as much as possible even if they are displayed on different drawings.

1 is a cross-sectional view of an electronic device according to a first embodiment of the present application.

Referring to FIG. 1 , the electronic device according to the first embodiment of the present application includes a display module 100, a housing 300, a rear cover 400, a driving circuit unit 500, and a vibration generating device 600. .

The display module 100 includes a display panel 110 .

The display panel 110 may be a light emitting display panel or a flexible light emitting display panel. The display panel 110 includes a pixel array substrate having a pixel array composed of a plurality of pixels, and an encapsulation layer encapsulating the pixel array.

Each of the plurality of pixels is provided in a pixel area defined by pixel driving lines. Further, each of the plurality of pixels includes a pixel circuit having at least two thin film transistors and at least one capacitor, and a light emitting element that emits light by current supplied from the pixel circuit. As an example, the light emitting device includes an organic light emitting layer or a quantum dot light emitting layer. As another example, the light emitting device includes 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. Also, the encapsulation layer may be replaced with an encapsulation substrate attached to the pixel array substrate through a filler surrounding the pixel array. When the filler is formed of a transparent filler, the encapsulation substrate may be a transparent encapsulation substrate.

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

The display module 100 according to an example of the present application further includes 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 attachment member. The polarizing film serves to improve visibility and contrast ratio of the display panel 110 by changing external light reflected by thin film transistors and/or pixel driving lines provided on the pixel array substrate into a circularly polarized state. Also, the polarizing film 150 may be disposed between the encapsulation layer of the display panel 110 and the touch panel 130 .

Also, the display module 100 further includes a barrier layer interposed between the encapsulation layer of the display panel 110 and the touch panel 130 . The barrier layer may serve to prevent moisture or the like from penetrating toward the pixel array.

Also, the display module 100 may further include a color filter layer provided on the upper surface of the encapsulation layer of the display panel 110 . The color filter layer is provided to overlap each of a plurality of pixels and includes a color filter that transmits only wavelengths of colors set in each of a plurality of pixels.

The housing 300 surrounds the rear and side surfaces of the display module 100 . For example, the housing 300 may surround the rear and side surfaces of the display module 100 by accommodating the display module 100 therein. The housing 300 according to an example includes a housing bottom part 310 and a housing side wall part 330 .

The housing bottom part 310 is disposed on the rear surface of the display module 100 and covers the rear surface of the display module 100 .

The side wall portion 330 of the housing is formed in a frame shape to have a display accommodating space in which the display module 100 is accommodated, and surrounds each side of the display module 100 . The housing sidewall portion 330 is vertically connected to each outer wall of the housing bottom portion 310 . For example, a cross section between the housing side wall portion 330 and each outer wall of the housing bottom portion 310 may have a "Q" or "A" shaped cross section depending on the cross section location. The housing side wall portion 330 is formed in a frame shape to have a display storage space in which the display module 100 is accommodated, and surrounds each side of the display module 100 .

The housing sidewall portion 330 according to an example provides a storage space for accommodating the display module 100 on the front surface of the housing bottom portion 310 and is driven on the rear surface of the housing bottom portion 310. A circuit accommodating space may be provided for accommodating peripheral circuits of an electronic device including a circuit configuration such as the circuit unit 500 and a battery.

The rear cover 400 is coupled to the housing 300 and covers the rear surface of the housing 300 . For example, the rear cover 400 covers a circuit accommodating space provided on the rear surface of the housing 300 .

The rear cover 400 according to an example may be coupled to the lower stepped portion 370 provided on the housing sidewall portion 330 of the housing 300 . For example, the rear cover 400 may be made of the same material as the cover window 700 or a glass material different from that of the cover window 700 .

The driving circuit unit 500 is disposed in a circuit accommodating space provided in the housing 300 and is connected to the display panel 110 and the vibration generating device 600 . The driving circuit unit 500 includes a panel driving unit 510 and a sound processing unit 520 .

The panel driver 510 is mounted on a circuit board to display images on the display panel 110 . The panel driver 510 is connected to a pad 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 unit 520 is disposed on the rear side of the housing bottom part 310 . The sound processing unit 520 generates an audio signal based on an audio source and transmits it to the vibration generating device 600, the vibration generating device 600 amplifies the audio signal to generate a vibration driving signal, and generates the vibration driving signal. plate vibration occurs. Here, the vibration generating device 600 may convert an audio signal corresponding to an electrical signal into a vibration driving signal corresponding to the vibration signal.

The sound processor 520 may generate a first phase audio signal and a second phase audio signal.

The first phase audio signal may be transmitted to the first vibration generating device 610 to cause plate vibration by the first vibration generating device 610 . For example, the first vibration generating device 610 may generate a first vibration driving signal by amplifying the first phase audio signal, and coupled to the first vibration generating device 610 by the first vibration driving signal. The display module 100 vibrates.

The second phase audio signal may be transmitted to the second vibration generating device 620 to cause the second vibration generating device 620 to vibrate. For example, the second vibration generating device 620 may generate a second vibration driving signal by amplifying the second phase audio signal, and coupled with the second vibration generating device 610 by the second vibration driving signal. The rear cover 400 vibrates.

The first phase audio signal and the second phase audio signal according to an example have phases opposite to each other. For example, the first phase audio signal can be regarded as a normal phase audio signal, and the second phase audio signal can be regarded as a negative phase audio signal. The sound processing unit 520 generates a first phase audio signal and a second phase audio signal having phases opposite to each other, transfers the generated first and second phase audio signals to the first and second vibration generating devices 610 and 620, respectively, and generates the first and second phase audio signals. The vibration generating devices 610 and 620 generate first and second vibration driving signals by amplifying the first and second phase audio signals, and generate the first and second vibration generating devices by the first and second vibration driving signals. The display module 100 and the rear cover 400 combined with 610 and 620 may vibrate.

In this way, the first and second vibration generating devices 610 and 620 generate a vibration drive signal according to an audio signal having a phase opposite to each other, and the display module 100 and the rear cover 400 are moved by the vibration drive signal. may output vibration waveforms of phases opposite to each other. Therefore, the vibration generated by the display module 100 and directed to the rear cover 400 may be offset from the vibration generated by the rear cover 400 . A detailed principle for this will be described later.

The vibration generating device 600 is disposed on the rear surface of the display module 100 and the front surface of the rear cover 400 . The vibration generating device 600 according to an example includes a first vibration generating device 610 and a second vibration generating device 620 .

The first vibration generating device 610 is disposed on the rear surface of the display module 100, for example, on the rear surface of the display panel 110. The first vibration generating device 610 is attached to the rear surface of the display panel 110 via an adhesive member. The first vibration generating device 610 may output sound in the forward direction Z of the display panel 110 by vibrating the display module 100 according to the first vibration driving signal.

The second vibration generating device 620 is disposed on the front surface of the rear cover 400 . The second vibration generating device 620 is attached to the front surface of the rear cover 400 via an adhesive member. The second vibration generating device 620 may output sound in the rear direction (-Z) of the rear cover 400 by vibrating the rear cover 400 according to the second vibration driving signal.

The adhesive member may be a double-sided tape or a natural curable adhesive, but is not limited thereto.

The first vibration generating device 610 and the second vibration generating device 620 according to an example include a vibration generating element.

The vibration generating element includes a piezoelectric material layer having a piezoelectric effect, a first electrode disposed on the front surface of the piezoelectric material layer, and a second electrode disposed on the rear surface of the piezoelectric material layer. Here, since the vibration generating element includes a piezoelectric material layer, it may be expressed as a piezoelectric element.

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

The vibration generating element according to an example includes 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 single crystal ceramic or polycrystalline ceramic. In this application, the piezoelectric material of the polymeric material includes PVDF (polyvinylidene difluoride), P (VDF-TrFe), or P (VDFTeFE). The piezoelectric material of the thin film material includes ZnO, CdS, or AlN. The piezoelectric material of the composite material includes lead zirconate titanate (PZT)-PVDF, PZT-Silicon Rubber, PZT-Epoxy, PZT-expanded polymer, or PZT-expanded urethane. The piezoelectric material of the single crystal ceramic includes α-AlPO4, α-SiO2, LiNbO3, Tb2(MoO4)3, Li2B4O7, or ZnO. Piezoelectric materials of polycrystalline ceramics include PZT-based, PT-based, PZT-Complex Perovskite-based, or BaTiO3.

The first electrode and the second electrode are provided to overlap each other with a piezoelectric material layer interposed therebetween. The first electrode and the second electrode may be made of an opaque metal material having relatively low resistance and excellent heat dissipation characteristics, but are not limited thereto, and may be made of a transparent conductive material or a conductive polymer material.

The second vibration generating device 620 according to an example may be formed to have a smaller area than the first vibration generating device 610 . Therefore, the vibration generated by the display module 100 and directed to the rear cover 400 may be offset from the vibration generated by the rear cover 400 . A detailed principle for this will be described later.

An electronic device according to an example of the present application further includes a cover window 700 .

The cover window 700 is coupled to the housing 300 to support the display module 100 . For example, the cover window 700 may support the display module 100 and be supported by the upper stepped portion 360 provided on the housing side wall portion 330 of the housing 300 .

The cover window 700 according to an example may be made of glass or a tempered glass material. For example, the cover window 700 may have any one of sapphire glass and gorilla glass, or a bonding structure thereof. The cover window 700 may be attached to the front surface of the display module 100 via an optical adhesive member. In this case, the optical adhesive member may be optically clear adhesive (OCA), optically clear resin (OCR), or pressure sensitive adhesive (PSA).

FIG. 2 shows how vibration is transmitted in FIG. 1 . Hereinafter, redundant description of components overlapping those of FIG. 1 will be omitted.

Referring to FIG. 2 , in an example of the present application, the first vibration generating device 610 and the second vibration generating device 620 may vibrate the display module 100 and the rear cover 400 .

The first vibration generating device 610 may vibrate the display module 100 according to the first vibration driving signal. At this time, a first vibration V1 corresponding to plate vibration is generated in the display module 100 . The first vibration V1 may generate sound while contracting and expanding the air in front of the display panel 110 . The first vibration V1 includes the first internal vibration Vn1 and the first side vibration Vs1 transmitted in the rear direction (-Z) of the display panel 110 .

The first internal vibration Vn1 may be regarded as a vibration generated when the air layer inside the display apparatus contracts and expands due to the first vibration V1. The first internal vibration Vn1 may vibrate the housing bottom portion 310, and the housing bottom portion 310 may generate second internal vibration Vn2.

The second internal vibration Vn2 is generated by the bottom part 310 of the housing and transmitted to the rear cover 400 .

The first side vibration Vs1 may be regarded as a vibration generated as the first vibration V1 is transmitted to the side wall portion 330 of the housing. As the first side vibration (Vs1) proceeds in the direction (-Z) of the rear cover 400 along the housing side wall portion 330, the strength of the vibration is attenuated and transmitted to the rear cover 400. That is, since the housing sidewall portion 330 has poor vibration transmitting power, the strength of the first side vibration Vs1 traveling in the direction (-Z) of the rear cover 400 along the housing sidewall portion 330 is gradually attenuated. , the attenuated first side vibration Vs1 is transmitted to the rear cover 400.

The second internal vibration Vn2 and the second side vibration Vs2 according to an example may be transferred to the rear cover 400 and synthesized, and may generate second vibration V2 as a synthesized vibration. This second vibration (V2) corresponds to the vibration of the rear surface, and may generate a leakage sound while contracting and expanding the air at the rear of the rear cover 400.

The second vibration generating device 610 may vibrate the rear cover 400 according to the second vibration driving signal. At this time, the third vibration V3 corresponding to plate vibration occurs in the rear cover 400 . The third oscillation V3 may have an opposite phase to the second oscillation V2 and have the same signal level. Therefore, the fourth vibration (V4), which is a synthetic vibration of the second vibration (V2) and the third vibration (V3), becomes 0, so that sound is not output in the rear direction (-Z) of the rear cover 400. .

The second vibration generating device 620 according to an example may be formed to have a smaller area than the first vibration generating device 610 . The size of sound generated from the panel coupled with the vibration generating device 600 is proportional to the area of the vibration generating device 600 . Accordingly, the area of the second vibration generating device 620 may be smaller than that of the first vibration generating device 610 so that the third vibration V3 having the same size as the second vibration V2 may be output. .

The sound processor 520 according to an example may adjust a gain value of a phase audio signal. For example, the sound processor 520 transmits the first phase audio signal to the first vibration generating device 610 and transmits a second phase audio signal having a smaller gain than the first phase audio signal to the second vibration generating device ( 620) can be forwarded. In this way, by adjusting the gain value of the phase audio signal, the second vibration V2 and the third vibration V3 may have the same magnitude.

In the electronic device according to an example of the present application, the display module 100, for example, the display panel 110 vibrates according to the driving of the vibration generating device 600, thereby generating sound according to the vibration of the display panel 110. may be output toward a viewer (or user) watching an image from the front of the display panel 110 . Therefore, according to an example of the present application, the electronic device can increase the immersion of the viewer watching the image by outputting sound to the viewer through the vibration of the display module 100 without a separate sound device or speaker, and light weight and /or can be slimmed down.

In addition, the electronic device according to the present application may prevent sound from being output in the rear direction (-Z) of the rear cover 400 . The electronic device according to the present application can prevent leakage sound by minimizing additional vibrations inevitably generated in a plate vibration system. For example, by attaching the second vibration generating device 620 to the rear cover 400, the rear vibration transmitted to the rear cover 400 can be offset and removed, and leak sound caused by the rear vibration can be removed. .

FIG. 3 is a graph showing waveforms of V2, V3, and V4 in FIG. 2;

Referring to FIG. 3 , it can be seen that the signals of the second vibration V2 and the third vibration V3 have the same amplitude and opposite phases. For example, it can be seen that the amplitudes of the second vibration (V2) and the third vibration (V3) are the same as 1, and the phases have opposite waveforms.

The second vibration V2 can be viewed as a rear vibration generated in the display module 100 and transmitted to the rear cover 400, and the third vibration V3 can be viewed as a vibration generated in the rear cover 400. In this way, the second vibration V2 and the third vibration V3 may have the same size by adjusting the gain value of the audio signal or adjusting the area of the second vibration generating device 620 . Also, the phase of the audio signal may be adjusted so that the second vibration V2 and the third vibration V3 have phases opposite to each other.

The fourth vibration V4, which is a synthesized vibration, appears due to the second vibration V2 and the third vibration V3.

As shown in the figure, the fourth oscillation V4 has a constant magnitude of 0. That is, the amplitude of the fourth vibration V4 corresponds to 0, and the fourth vibration V4 may be a constant signal in which vibration does not occur.

In this way, since vibration does not occur in the rear cover 400, it is possible to prevent leakage noise from occurring in the rear direction (-Z) of the rear cover 400.

4 is a cross-sectional view of an electronic device according to a second embodiment of the present application. In FIG. 4, the same reference numerals are assigned to components overlapping those of FIG. 1, and overlapping descriptions thereof will be omitted.

Referring to FIG. 4 , the electronic device according to the second embodiment of the present application includes a driving circuit unit 500 and a vibration generating device 600 .

The driving circuit unit 500 includes a sound processing unit 520 .

The sound processing unit 520 is disposed on the rear side of the housing bottom part 310 . The sound processing unit 520 generates an audio signal based on an audio source and transmits it to the vibration generating device 600, the vibration generating device 600 amplifies the audio signal to generate a vibration driving signal, and generates the vibration driving signal. plate vibration occurs. Here, the vibration generating device 600 may convert an audio signal corresponding to an electrical signal into a vibration driving signal corresponding to the vibration signal.

The sound processor 520 may generate a first phase audio signal.

The first phase audio signal may be transmitted to the first and second vibration generating devices 610 and 620 to cause plate vibration by the first and second vibration generating devices 610 and 620 . For example, the first and second vibration generating devices 610 and 620 may generate a first vibration driving signal by amplifying the first phase audio signal, and the first vibration generating device ( 610) and the rear cover 400 coupled with the display module 100 or the second vibration generating device 620 vibrate.

In this way, the first and second vibration generating devices 610 and 620 generate a vibration driving signal according to the same audio signal, and the display module 100 and the rear cover 400 generate the same vibration waveform by the vibration driving signal. can be printed out. Therefore, a two-way speaker mode capable of outputting sound in the front direction (Z) of the display module 100 and the rear direction (-Z) of the rear cover 400 can be implemented.

An electronic device according to the present application may further include a motion sensor.

The motion sensor may sense when the front surface of the display module 100 faces the floor (Face Down) and when it does not face the floor (Face Up). The motion sensor may sense Face Up/Down and transmit a signal to the sound processing unit 520, and the sound processing unit 520 may receive the sensing signal of the motion sensor and transmit the signal to the second vibration generating device 620 only when the face is down. Audio signals can be transmitted.

An electronic device according to the present application may include a first sound generating device 610 and a second sound generating device 620 to enable interactive sound output. Therefore, even if the listener is not in the front direction Z of the display module 100, he or she can hear clear sound. In addition, the electronic device according to the present application may include a motion sensor to enable bi-directional sound output in case of face down. For example, when sound is output from an electronic device such as a mobile device, the sound is output in the rear direction (-Z) of the rear cover 400 even in the case of face down, so clear sound can be delivered to the user.

In addition, the electronic device according to the present application may remove leakage noise due to rear vibration, similar to the electronic device shown in FIG. 3 . For example, when sound is output from an electronic device such as a mobile device, in the case of face up, leakage sound output in the rear direction (-Z) of the rear cover 400 is prevented and clear sound can be delivered to the user. In this case, the sound processing unit 520 may generate a first-phase audio signal and a second-phase audio signal, respectively, and transmit them to the first vibration generating device 610 and the second vibration generating device 620, respectively.

Also, the sound generating device according to the exemplary embodiment of the present application may be applied to a sound generating device disposed in a display device. The display device according to the embodiment of the present specification is a mobile device, a video phone, a smart watch, a watch phone, a wearable device, a foldable device, and a rollable device. device), bendable device, flexible device, curved device, electronic notebook, e-book, PMP (portable multimedia player), PDA (personal digital assistant), MP3 player, mobile Medical equipment, desktop PC, laptop PC, netbook computer, workstation, navigation, vehicle navigation, vehicle display, television, wallpaper display, laptop , monitors, cameras, camcorders, and home appliances. And, when applied to a mobile device, it may be applied to at least one of a receiver and a speaker.

The features, structures, effects, etc. described in the above examples of the present application are included in at least one example of the present application, and are not necessarily limited to only one example. Furthermore, the features, structures, effects, etc. exemplified in at least one example of this application can be combined or modified with respect to other examples by those skilled in the art to which this application belongs. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present application.

In one example of the present application, an electronic device includes a display module displaying an image, a housing surrounding side and rear surfaces of the display module, a rear cover covering the rear surface of the display module, a first vibration generating device for vibrating the display module, and and a second vibration generating device that vibrates the rear cover.

In one example of the present application, the electronic device further includes a driving circuit unit disposed in the circuit accommodating space of the housing.

In one example of the present application, the driving circuit unit includes a sound processing unit for vibrating the first vibration generating device and the second vibration generating device.

In one example of the present application, the housing includes a housing bottom portion surrounding the rear surface of the display module and a housing side wall portion surrounding the side surface of the display module, and the sound processing unit is provided on the rear surface of the housing bottom portion.

In an example of the present application, the sound processor transmits the first phase audio signal to the first vibration generating device and the second phase audio signal to the second vibration generating device.

In one example of the present application, phases of the first phase audio signal and the second phase audio signal are opposite to each other.

In one example of the present application, the area of the second vibration generating device is smaller than that of the first vibration generating device.

In one example of the present application, the sound processor transmits the first phase audio signal to the first and second vibration generating devices.

In one example of the present application, the first vibration generating device and the second vibration generating device have the same area.

In one example of the present application, the first and second vibration generating devices include a vibration generating element.

In one example of the present application, the vibration generating element includes a piezoelectric material.

The present application described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which this application belongs that various substitutions, modifications, and changes are possible without departing from the technical details of the present application. It will be clear to those who have knowledge of Therefore, the scope of the present application is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present application.

100: display module 110: display panel
300: housing 400: rear cover
500: driving circuit unit 600: vibration generating device
700: cover window

Claims (13)

a display module having a display panel displaying an image through a pixel array;
a housing surrounding side and rear surfaces of the display module;
a rear cover covering the rear surface of the display module;
a first vibration generator attached to a rear surface of the display panel through a first adhesive member, overlapping the pixel array, and vibrating the display module; and
A second vibration generating device attached to the front surface of the rear cover through a second adhesive member to vibrate the rear cover;
When the first vibration generating device vibrates the display module to output sound in a forward direction of the display module, the vibration generated in the display module by the first vibration generating device and transmitted to the rear cover is The electronic device, which is offset by the vibration generated in the rear cover by the second vibration generating device. According to claim 1,
The electronic device further comprises a driving circuit part disposed in the circuit accommodating space of the housing. According to claim 2,
The electronic device, wherein the driving circuit unit includes a sound processing unit for vibrating the first vibration generating device and the second vibration generating device. According to claim 3,
the housing,
a housing bottom portion surrounding a rear surface of the display module; and
A housing sidewall portion surrounding a side surface of the display module,
The sound processing unit is provided on the rear surface of the bottom of the housing,
The first vibration generating device is spaced apart from and facing the front surface of the bottom of the housing,
The second vibration generating device faces the rear surface of the bottom part of the housing at a distance from each other. According to claim 4,
wherein the sound processor transmits a first phase audio signal to the first vibration generating device and transmits a second phase audio signal to the second vibration generating device. According to claim 5,
Phases of the first phase audio signal and the second phase audio signal are opposite to each other;
The electronic device, wherein the vibration generated by the display module and directed to the rear cover and the vibration generated from the rear cover have opposite phases to each other. According to claim 6,
An area of the second vibration generating device is smaller than an area of the first vibration generating device. According to claim 6,
The electronic device, wherein the first vibration generating device and the second vibration generating device have the same area. According to claim 4,
When the first vibration generating device vibrates the display module to output sound toward the front of the display module, and the second vibration generating device vibrates the rear cover to output sound toward the rear of the rear cover ,
wherein the sound processing unit transmits a first phase audio signal to the first and second vibration generating devices. According to claim 9,
The electronic device, wherein the first vibration generating device and the second vibration generating device have the same area. According to claim 1,
The electronic device, wherein the first and second vibration generating devices include a vibration generating element. According to claim 11,
The vibration generating element includes a piezoelectric material, an electronic device. According to claim 1,
The electronic device of claim 1 , wherein the second vibration generating device overlaps the first vibration generating device with a bottom portion of the housing interposed therebetween.

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