Display device

Abstract

A display device is provided. The display device includes: a display panel including a first substrate and a pixel array layer disposed on a first surface of the first substrate; a vibration generator including a sound output unit and a first ultrasonic wave output unit, the sound output unit vibrates the display panel to output sound, and the first ultrasonic wave output unit vibrates the display panel to output ultrasonic waves; and a first ultrasonic wave absorbing film overlapped with the first ultrasonic wave output unit in a thickness direction of the display panel, wherein the first ultrasonic wave absorbing film absorbs ultrasonic waves.

Description

[0001] This application claims priority to and all the benefits of Korean Patent Application No. 10-2018-0173049, filed on December 28, 2018, and Korean Patent Application No. 10-2019-0038944, filed on April 3, 2019, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0002] An embodiment of the invention relates to a display device. Background Art

[0003] With the development of the information society, the demand for display devices for displaying images has increased in various forms. More specifically, display devices are applied to various electronic appliances, such as smart phones, digital cameras, notebook computers, navigators, and smart TVs. The display device may include a display panel for displaying images and a sound generator for providing sound. Summary of the invention

[0004] As display devices are applied to various electronic appliances, display devices with various designs are expected. For example, a smart phone may be expected to include a display device capable of increasing a display area by omitting a call receiver for outputting a voice of the other party in a sound mode and a proximity sensor for determining whether a user is positioned close to the front surface of the display device.

[0005] Embodiments of the invention are directed to providing a display device capable of outputting sound and performing an ultrasonic proximity sensing process using at least one vibration generator that is not exposed to the outside.

[0006] According to a disclosed embodiment, a display device includes: a display panel including a first substrate and a pixel array layer arranged on a first surface of the first substrate; a vibration generator arranged on a second surface of the first substrate opposite to the first surface of the first substrate, wherein the vibration generator outputs ultrasonic waves; and a first ultrasonic wave absorbing film overlapped with the vibration generator in a thickness direction of the display panel, wherein the first ultrasonic wave absorbing film absorbs ultrasonic waves.

[0007] In an embodiment, a first surface of the vibration generator may face the second surface of the first substrate, and the first ultrasonic wave absorbing film may be disposed on a second surface of the vibration generator opposite to the first surface of the vibration generator.

[0008] In an embodiment, the display device may further include a second ultrasonic wave absorbing film disposed on the first side surface of the vibration generator, wherein the second ultrasonic wave absorbing film may absorb ultrasonic waves.

[0009] In an embodiment, the display device may further include a third ultrasonic wave absorbing film disposed on the second side surface of the vibration generator, wherein the third ultrasonic wave absorbing film may absorb ultrasonic waves.

[0010] In the embodiment, the second ultrasonic wave absorbing film and the third ultrasonic wave absorbing film surround the side surface of the vibration generator.

[0011] In an embodiment, the display device may further include: a bottom cover disposed on the second surface of the first substrate; and a fourth ultrasonic wave absorbing film disposed on the bottom cover and absorbing ultrasonic waves.

[0012] In an embodiment, the bottom cover may include: a light blocking film disposed on the second surface of the first substrate; a buffer film disposed on the light blocking film; and a heat dissipation film disposed on the buffer film, wherein the fourth ultrasonic wave absorbing film is disposed on the heat dissipation film.

[0013] In an embodiment, the vibration generator may not overlap the heat dissipation film in the thickness direction of the display panel, and the vibration generator may be disposed on the buffer film.

[0014] In an embodiment, the display device may further include a frame disposed on the second surface of the first substrate, wherein the first ultrasonic wave absorbing film is disposed on a first surface of the frame facing the second surface of the first substrate.

[0015] According to a disclosed embodiment, a display device includes: a display panel, including a first substrate and a pixel array layer arranged on a first surface of the first substrate; a vibration generator, including a sound output unit and a first ultrasonic output unit, the sound output unit vibrates the display panel to output sound, and the first ultrasonic output unit vibrates the display panel to output ultrasonic waves; and a first ultrasonic absorbing film, overlapped with the first ultrasonic output unit in a thickness direction of the display panel, wherein the first ultrasonic absorbing film absorbs ultrasonic waves.

[0016] In an embodiment, the sound output unit may include a first electrode, a second electrode and a first vibration layer, a first driving voltage is applied to the first electrode, a second driving voltage is applied to the second electrode, and the first vibration layer is arranged between the first electrode and the second electrode, wherein the first vibration layer can shrink and expand based on the first driving voltage and the second driving voltage, and the first ultrasonic output unit may include a third electrode, a fourth electrode and a second vibration layer, a third driving voltage is applied to the third electrode, a fourth driving voltage is applied to the fourth electrode, and the second vibration layer is arranged between the third electrode and the fourth electrode, wherein the second vibration layer can shrink and expand based on the third driving voltage and the fourth driving voltage.

[0017] In an embodiment, the first ultrasonic output unit may be disposed on a second surface of the first substrate opposite to the first surface of the first substrate, the sound output unit may be disposed on the first ultrasonic output unit, and the first ultrasonic absorbing film may be disposed on the sound output unit.

[0018] In an embodiment, the display device may further include a second ultrasonic wave absorbing film disposed on the first side surface of the first ultrasonic wave output unit, wherein the second ultrasonic wave absorbing film may absorb ultrasonic waves.

[0019] In an embodiment, the display device may further include a third ultrasonic wave absorbing film disposed on the second side surface of the first ultrasonic wave output unit, wherein the third ultrasonic wave absorbing film may absorb ultrasonic waves.

[0020] In an embodiment, the second ultrasonic wave absorbing film and the third ultrasonic wave absorbing film may surround a side surface of the first ultrasonic wave output unit.

[0021] In an embodiment, the second ultrasonic wave absorbing film or the third ultrasonic wave absorbing film may be provided on a side surface of the sound output unit.

[0022] In an embodiment, the first ultrasonic output unit and the sound output unit may be provided on a second surface of the first substrate opposite to the first surface of the first substrate, and the first ultrasonic absorbing film may be provided on the first ultrasonic output unit.

[0023] In an embodiment, a first ultrasonic wave absorbing film may be provided on the sound output unit.

[0024] In an embodiment, the first side surface of the first ultrasonic wave output unit and the first side surface of the sound output unit may directly contact each other.

[0025] In an embodiment, the display device may further include: a second ultrasonic absorbing film, disposed on a second side surface of the first ultrasonic output unit, wherein the second ultrasonic absorbing film can absorb ultrasonic waves; and a third ultrasonic absorbing film, disposed on a second side surface of the sound output unit, wherein the third ultrasonic absorbing film can absorb ultrasonic waves.

[0026] In an embodiment, the second ultrasonic wave absorbing film may surround a side surface of the first ultrasonic wave output unit, and the third ultrasonic wave absorbing film may surround a side surface of the sound output unit.

[0027] In an embodiment, the vibration generator may further include a second ultrasonic wave output unit that vibrates the display panel to output ultrasonic waves.

[0028] In an embodiment, the second ultrasonic output unit may include a fifth electrode, a sixth electrode and a third vibration layer, a fifth driving voltage is applied to the fifth electrode, a sixth driving voltage is applied to the sixth electrode, and the third vibration layer is arranged between the fifth electrode and the sixth electrode, wherein the third vibration layer can shrink and expand based on the fifth driving voltage and the sixth driving voltage.

[0029] In an embodiment, a first ultrasonic output unit may be disposed on a second surface of the first substrate opposite to the first surface of the first substrate, a sound output unit may be disposed on the first ultrasonic output unit, a second ultrasonic output unit may be disposed on the sound output unit, and a first ultrasonic absorbing film may be disposed on the second ultrasonic output unit.

[0030] In an embodiment, the display device may further include a second ultrasonic wave absorbing film disposed on the first side surface of the second ultrasonic wave output unit, wherein the second ultrasonic wave absorbing film may absorb ultrasonic waves.

[0031] In an embodiment, the display device may further include a third ultrasonic wave absorbing film disposed on the second side surface of the second ultrasonic wave output unit, wherein the third ultrasonic wave absorbing film may absorb ultrasonic waves.

[0032] In an embodiment, the second ultrasonic wave absorbing film and the third ultrasonic wave absorbing film may surround a side surface of the second ultrasonic wave output unit.

[0033] In an embodiment, a second ultrasonic wave absorbing film may be provided on the first side surface of the first ultrasonic wave output unit and the first side surface of the sound output unit.

[0034] In an embodiment, the first ultrasonic output unit, the sound output unit and the second ultrasonic output unit may be disposed on a second surface of the first substrate opposite to the first surface of the first substrate, and the first ultrasonic absorbing film may be disposed on the first ultrasonic output unit and the second ultrasonic output unit.

[0035] In an embodiment, a first ultrasonic wave absorbing film may be provided on the sound output unit.

[0036] In an embodiment, the sound output unit may be provided between the first ultrasonic wave output unit and the second ultrasonic wave output unit.

[0037] In an embodiment, a first side surface of the first ultrasonic output unit and a first side surface of the sound output unit may directly contact each other, and a first side surface of the second ultrasonic output unit and a second side surface of the sound output unit may directly contact each other.

[0038] In an embodiment, the display device may further include: a second ultrasonic absorbing film, arranged on the second side surface of the first ultrasonic output unit, wherein the second ultrasonic absorbing film can absorb ultrasonic waves; and a third ultrasonic absorbing film, arranged on the second side surface of the second ultrasonic output unit, wherein the third ultrasonic absorbing film can absorb ultrasonic waves.

[0039] In an embodiment, the second ultrasonic wave absorbing film may surround a side surface of the first ultrasonic wave output unit, and the third ultrasonic wave absorbing film may surround a side surface of the second ultrasonic wave output unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and other features of the invention will become more apparent by describing in detail exemplary embodiments of the invention with reference to the accompanying drawings, in which:

[0041] Figure 1 is a perspective view of a display device according to an embodiment;

[0042] Figure 2 is an exploded perspective view of a display device according to an embodiment;

[0043] Figure 3 is shown attached to Figure 2 A bottom view of an embodiment of a bottom cover of a cover window;

[0044] Figure 4 It is shown Figure 2 A plan view of an embodiment of the intermediate frame;

[0045] Figure 5A It is shown Figure 2 A plan view of an embodiment of a main circuit board;

[0046] Figure 5B yes Figure 5A An enlarged view of the circled part;

[0047] Figure 6 According to the embodiment along Figure 3 A cross-sectional view taken along line II';

[0048] Figure 7 yes Figure 6 an enlarged cross-sectional view of region A;

[0049] Figure 8 It is shown Figure 6 A cross-sectional view of a display area of ​​a display panel;

[0050] Fig. 9 is a graph showing ultrasonic waves generated by a vibration generator on a first surface and a second surface of a display device;

[0051] Fig.10 It is shown Figure 6 A cross-sectional view of an embodiment of a vibration generator;

[0052] Fig.11 is a schematic diagram showing a method of vibrating a vibration layer disposed between a first branch electrode and a second branch electrode of a vibration generator;

[0053] Fig.12 and Fig.13 is a schematic diagram showing a method of vibrating a display panel by utilizing vibration of a vibration generator;

[0054] Fig.14 It is shown Figure 6 A cross-sectional view of an alternative embodiment of a vibration generator;

[0055] Fig.15 It is shown Figure 6 A cross-sectional view of another optional embodiment of a vibration generator;

[0056] Fig.16 It is shown Figure 6 A cross-sectional view of another optional embodiment of a vibration generator;

[0057] Fig.17 It is shown Figure 6 A cross-sectional view of another optional embodiment of a vibration generator;

[0058] Fig.18 It is shown Figure 6 A cross-sectional view of another optional embodiment of a vibration generator;

[0059] Fig.19 It is shown Figure 6 A cross-sectional view of another optional embodiment of a vibration generator;

[0060] Fig. 20 According to an optional embodiment, Figure 3 A cross-sectional view taken along line II';

[0061] Fig.21 It is shown Fig. 20 A cross-sectional view of an embodiment of a vibration generator;

[0062] Fig. 22 It is shown Fig. 20 A cross-sectional view of an alternative embodiment of a vibration generator;

[0063] Fig.23 It is shown Fig. 20 A cross-sectional view of an embodiment of a vibration generator;

[0064] Fig.24 It is shown Fig. 20 A cross-sectional view of an alternative embodiment of a vibration generator;

[0065] Fig.25 It is shown Fig. 20 A cross-sectional view of another optional embodiment of a vibration generator;

[0066] Fig.26 It is shown Fig. 20 A cross-sectional view of another optional embodiment of a vibration generator;

[0067] Fig. 27 According to another optional embodiment, Figure 3 A cross-sectional view taken along line II';

[0068] Fig.28 yes Fig. 27 an enlarged cross-sectional view of region A;

[0069] Fig.29 According to another optional embodiment, Figure 3 A cross-sectional view taken along line II' of FIG.

[0070] Fig.30 According to another optional embodiment, Figure 3 A cross-sectional view taken along line II'. DETAILED DESCRIPTION

[0071] The invention will now be described more fully hereinafter with reference to the accompanying drawings, in which various embodiments are shown. However, the invention may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those skilled in the art. The same reference numerals represent the same elements throughout.

[0072] It will also be understood that when a layer is referred to as being “on” another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. In contrast, when an element is referred to as being “directly on” another element, there are no intervening elements present.

[0073] It will be understood that, although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings herein, the "first element", "first component", "first region", "first layer" or "first part" discussed below may be named as the second element, second component, second region, second layer or second part.

[0074] The terms used here are for the purpose of describing specific embodiments only and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "one", "one (kind / person)" and "the (the)" are intended to include plural forms (including "at least one (person) of ..."). "Or" means "and / or". "At least one (person) of A and B" means "A and / or B". As used herein, the term "and / or" includes any combination and all combinations of one or more related listed items. It will also be understood that when the term "comprising" and / or its variations or "including" and / or its variations are used in this specification, it is explained that the stated features, regions, wholes, steps, operations, elements and / or components exist, but the presence or addition of one or more other features, regions, wholes, steps, operations, elements, components and / or their groups is not excluded.

[0075] In addition, relative terms such as "below" or "bottom" and "above" or "top" may be used herein to describe the relationship of one element to other elements as shown in the drawings. It will be understood that relative terms are intended to include different orientations of the device in addition to the orientation depicted in the drawings. For example, if the device in a drawing is turned over, the element described as "on the "lower" side of the other elements will then be positioned as "on the "upper" side of the other elements. The exemplary term "below" can therefore include both "lower" and "upper" orientations depending on the specific orientation of the drawing. Similarly, if the device in a drawing is turned over, the element described as "below" or "below" the other elements will then be positioned as "above" the other elements. The exemplary terms "below..." or "below..." can therefore include both upper and lower orientations.

[0076] To take into account problematic measurements and errors associated with measurement of a particular quantity (i.e., limitations of the measurement system), "about" or "approximately" as used herein includes the stated value and average value within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art.

[0077] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those of ordinary skill in the art to which the present disclosure belongs. It will also be understood that terms (such as those defined in common dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless clearly defined herein.

[0078] Exemplary embodiments are described herein with reference to cross-sectional views as schematic diagrams of idealized embodiments. As such, variations in the shapes of the diagrams caused by, for example, manufacturing techniques and / or tolerances are to be expected. Therefore, the embodiments described herein should not be construed as being limited to the specific shapes of the regions as shown here, but will include deviations in shapes caused by, for example, manufacturing. For example, a region shown or described as flat may typically have rough and / or nonlinear features. In addition, the sharp angles shown may be rounded. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the precise shapes of the regions, and are not intended to limit the scope of the claims.

[0079] Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings.

[0080] Figure 1 is a perspective view of a display device according to an embodiment, Figure 2 is an exploded perspective view of a display device according to an embodiment.

[0081] Reference Figure 1 and Figure 2 The embodiment of the display device 10 includes a cover window 100, a display panel 300, a display circuit board 310, a display driving circuit 320, and a bottom cover 400 (see Figure 3 ), the vibration generator 510, the middle frame 600, the main circuit board 700 and the lower cover 900.

[0082] Here, the terms "on ...", "above ...", "top surface", "upper side" or "upper surface" refer to the direction along which the cover window 100 is set relative to the display panel 300 (i.e., the Z-axis direction), and the terms "under ...", "below ...", "bottom surface", "lower side" or "lower surface" refer to the direction along which the intermediate frame 600 is set relative to the display panel 300 (i.e., the direction opposite to the Z-axis direction). In addition, the terms "left", "right", "upper" and "lower" refer to the directions when the display panel 300 is viewed from a top view. For example, "left" refers to the direction opposite to the X-axis direction, "right" refers to the X-axis direction, "upper" refers to the Y-axis direction, and "lower" refers to the direction opposite to the Y-axis direction.

[0083] In an embodiment, the display device 10 may have a rectangular shape in a plan view. Figure 1 and Figure 2As shown in , the display device 10 may have a rectangular shape in a plan view with a short side in a first direction (X-axis direction) and a long side in a second direction (Y-axis direction). The edge where the short side in the first direction (X-axis direction) meets the long side in the second direction (Y-axis direction) may have a rounded shape with a predetermined curvature or have a right angle shape. The shape of the display device 10 is not limited to a rectangular shape, and may be variously modified to have another polygonal shape, a circular shape, or an elliptical shape.

[0084] The display device 10 may include a flat first region DR1 and a second region DR2 extending from the right and left sides of the first region DR1. The second region DR2 may be flat or curved. In an embodiment in which the second region DR2 is flat, the angle formed by the first region DR1 and the second region DR2 may be an obtuse angle. In an optional embodiment in which the second region DR2 is curved, the second region DR2 may have a constant curvature or a varying curvature.

[0085] In an embodiment, Figure 1 As shown in FIG. 1 , the second region DR2 extends from the left and right sides of the first region DR1, but the present invention is not limited thereto. Alternatively, the second region DR2 may extend from only one of the left and right sides of the first region DR1. Alternatively, the second region DR2 may extend from only one of the upper and lower sides of the first region DR1 and from only one of the left and right sides of the first region DR1. Hereinafter, for the convenience of description, the second region DR2 will be described in detail. Figure 1 and Figure 2 An embodiment in which the second region DR2 is arranged along the left and right edges of the display device 10 is shown in FIG.

[0086] In an embodiment, the cover window 100 may be disposed on the display panel 300 to cover the upper surface of the display panel 300. In such an embodiment, the cover window 100 may protect the upper surface of the display panel 300.

[0087] The cover window 100 may include a light-transmitting area DA100 corresponding to the display area of ​​the display panel 300 and a light-blocking area NDA100 corresponding to an area other than the display panel 300. The cover window 100 may be disposed in the first area DR1 and the second area DR2, and the light-transmitting area DA100 may be disposed in a portion of the first area DR1 and a portion of the second area DR2. The light-blocking area NDA100 may be opaque. Alternatively, the light-blocking area NDA100 may be a decorative layer having a pattern that can be seen by a user. In one embodiment, for example, a company logo or various characters may be patterned in the light-blocking area NDA100. In an embodiment, the light-blocking area NDA100 may be provided with a first camera hole CMH1 for exposing the front camera 740, but the invention is not limited thereto. In one embodiment, for example, the first camera hole CMH1 may be defined in the light-transmitting area DA100, but not in the light-blocking area NDA100. In such an embodiment, a through hole for exposing the front camera 740 may be defined in the display panel 300.

[0088] The display panel 300 may be disposed under the cover window 100. The display panel 300 may be disposed to overlap the light-transmitting area DA100 of the cover window 100. The display panel 300 may be disposed in the first region DR1 and the second region DR2. Therefore, an image of the display panel 300 may be seen not only in the first region DR1 but also in the second region DR2.

[0089] The display panel 300 may be a light-emitting display panel including a light-emitting element. In an embodiment, the display panel 300 may include, for example, at least one of the following display panels: an organic light-emitting display panel using an organic light-emitting diode including an organic light-emitting layer, an ultra-micro light-emitting diode display panel using an ultra-micro light-emitting diode ("ultra-micro LED"), a quantum dot light-emitting diode display panel using a quantum dot light-emitting diode including a quantum dot light-emitting layer, and an inorganic light-emitting display panel using an inorganic light-emitting diode including an inorganic semiconductor. Hereinafter, for ease of description, an embodiment in which the display panel 300 is an organic light-emitting display panel will be described in detail.

[0090] The display circuit board 310 and the display driving circuit 320 may be attached to the side of the display panel 300. One end of the display circuit board 310 may be attached to a pad (or "pad") provided on the side of the display panel 300 via an anisotropic conductive film. The display circuit board 310 may be a flexible printed circuit board.

[0091] The display driving circuit 320 receives a control signal and a power supply voltage through the display circuit board 310, and generates and outputs a signal and a voltage for driving the display panel 300. The display driving circuit 320 may be formed as an integrated circuit (or defined by an integrated circuit), and may be attached to the protruding area PA of the display panel 300 using a chip on glass (“COG”) method, a chip on plastic (“COP”) method, or an ultrasonic method (see FIG. Figure 3 ), but the invention is not limited thereto. In one embodiment, for example, the display driving circuit 320 can be attached to the display circuit board 310.

[0092] The touch drive circuit 330 may be disposed on the display circuit board 310. The touch drive circuit 330 may be formed as an integrated circuit and may be attached to the upper surface of the display circuit board 310. The touch drive circuit 330 may be connected to the touch sensor layer 306 ( Figure 8 The touch driving circuit 330 may apply a touch driving signal to a driving electrode among the touch electrodes in a mutual capacitance manner, and may sense a charge change of the capacitance between the driving electrode and the sensing electrode through a sensing electrode among the touch electrodes, thereby sensing a touch.

[0093] The vibration driving circuit 340 may be provided on the display circuit board 310. The vibration driving circuit 340 receives the first vibration data from the main processor 710 in the sound mode. The vibration driving circuit 340 generates a first first driving voltage and a second first driving voltage according to the first vibration data, and outputs the first first driving voltage and the second first driving voltage to the vibration generator 510. The vibration generator 510 may vibrate at a first frequency band according to the first first driving voltage and the second first driving voltage, and may vibrate the display panel 300 to output a first sound.

[0094] The vibration driving circuit 340 receives the second vibration data from the main processor 710 in the ultrasonic mode. The vibration driving circuit 340 generates the first second driving voltage and the second second driving voltage according to the second vibration data, and outputs the first second driving voltage and the second second driving voltage to the vibration generator 510. The vibration generator 510 can vibrate at a second frequency band according to the first second driving voltage and the second second driving voltage, and can vibrate the display panel 300 to output ultrasonic waves. The second frequency band may be a frequency band higher than the first frequency band.

[0095] The vibration driving circuit 340 may include: a digital signal processor ("DSP") for processing the first vibration data and the second vibration data as digital signals; a digital-to-analog converter ("DAC") for converting the vibration data processed by the DSP into a driving voltage as an analog signal; and an amplifier ("AMP") for amplifying and outputting the driving voltage.

[0096] The vibration generator 510 may be disposed under the display panel 300. The vibration generator 510 may include a piezoelectric element or a piezoelectric actuator for vibrating the display panel 300 using a piezoelectric material that contracts or expands according to a voltage applied thereto.

[0097] In an embodiment, Figure 2 As shown in , the vibration generator 510 is positioned close to the upper side of the display panel 300, but the position of the vibration generator 510 is not limited thereto. Alternatively, the vibration generator 510 may be disposed in an area where there is no mechanical interference with the display circuit board 310 and the battery hole BH and the second camera hole CMH2 defined in the middle frame 600. In such an embodiment, when viewed from a plan view in the thickness direction (Z-axis direction) of the display panel 300, the vibration generator 510 may not overlap with the display circuit board 310 and the battery hole BH and the second camera hole CMH2 in the middle frame 600.

[0098] The middle frame 600 may be disposed under the display panel 300. The middle frame 600 may include plastic, metal, or a combination thereof.

[0099] The middle frame 600 may be provided with a second camera hole CMH2 in which the camera device 720 is inserted, a battery hole BH in which a battery is disposed, and a cable hole CAH through which a cable 314 connected to the display circuit board 310 is disposed.

[0100] If the vibration generator 510 overlaps the battery hole BH in which the battery is disposed, the vibration generator 510 may be affected by the heat generated from the battery. Therefore, in an embodiment, the vibration generator 510 is disposed not to overlap the battery hole BH in the thickness direction (Z-axis direction) of the display panel 300.

[0101] The main circuit board 700 may be disposed under the middle frame 600. The main circuit board 700 may be a printed circuit board or a flexible printed circuit board.

[0102] The main circuit board 700 may include a main processor 710, a camera device 720, a main connector 730, a front camera 740, and a microphone 750. The camera device 720 may be disposed on both the upper surface and the lower surface of the main circuit board 700, the main processor 710 may be disposed on the upper surface of the main circuit board 700, and the main connector 730 may be disposed on the lower surface of the main circuit board 700.

[0103] The main processor 710 may control the overall operation of the display device 10. In one embodiment, for example, the main processor 710 may output digital video data to the display driving circuit 320 through the display circuit board 310 so that the display panel 300 displays an image. In an embodiment, the main processor 710 may receive touch data from the touch driving circuit 330, determine the user's touch position, and then execute an application indicated by an icon displayed at the user's touch position. In an embodiment, the main processor 710 may receive touch data from the touch driving unit, and may execute an application indicated by an icon displayed at the user's touch position according to the touch data.

[0104] The main processor 710 may output the first vibration data to the vibration driving circuit 340 for driving the vibration generator 510 so that the display panel 300 vibrates through the vibration generator 510, thereby outputting sound in the sound mode. The main processor 710 may output the second vibration data to the vibration driving circuit 340 for driving the vibration generator 510 so that the display panel 300 vibrates through the vibration generator 510, thereby outputting ultrasonic waves in the ultrasonic mode.

[0105] The main processor 710 may be an application processor, a central processing unit, or a system chip including an integrated circuit.

[0106] The camera device 720 processes an image frame such as a still image or a moving image obtained by an image sensor in a camera mode and outputs the processed image frame to the main processor 710 .

[0107] The cable 314 disposed through the cable hole CAH of the middle frame 600 may be connected to the main connector 730. Therefore, the main circuit board 700 may be electrically connected to the display circuit board 310 and the touch circuit board.

[0108] The main circuit board 700 may be provided with a microphone 750 for sensing ultrasonic waves generated by vibrating the display panel 300 using the vibration generator 510. The microphone 750 may be exposed to the outside through a microphone hole MICH defined through an upper portion of the lower cover 900.

[0109] In an embodiment, the main circuit board 700 may also be provided with a mobile communication module capable of transmitting or receiving radio signals to or from at least one of a base station, an external terminal, and a server. The radio signal may include various types of data corresponding to a voice signal, a video call signal, or text / multimedia message transmission / reception.

[0110] The lower cover 900 may be disposed below the middle frame 600 and the main circuit board 700. The lower cover 900 may be coupled and fixed to the middle frame 600. The lower cover 900 may define the lowermost surface of the display device 10. The lower cover 900 may include plastic and / or metal.

[0111] The lower cover 900 may be provided with a third camera hole CMH3 into which the camera device 720 is inserted to protrude outward. The position of the camera device 720 and the positions of the second and third camera holes CMH2 and CMH3 corresponding to the camera device 720 are not limited to Figure 2 Those in the embodiments shown in .

[0112] According to an embodiment, Figure 1 and Figure 2 As shown in , a vibration generator 510 for vibrating the display panel 300 to output sound or ultrasonic waves is provided on the surface of the display panel 300, so that the display panel 300 can be used as a vibration surface to output sound or ultrasonic waves by using the vibration generator 510 that is not exposed to the outside. Therefore, in such an embodiment, a call receiver for outputting the other party's voice and a proximity sensor for determining whether the user is positioned close to the front surface of the display device 10 located on the front of the display device 10 can be omitted, so that the light transmission area DA100 of the cover window 100 can be expanded, and thus the area in which the image is displayed by the display panel 300 can be expanded.

[0113] Figure 3 is shown attached to Figure 2 A bottom view of an embodiment of a bottom cover of a cover window, Figure 4 It is shown Figure 2 A plan view of an embodiment of an intermediate frame, Figure 5A It is shown Figure 2 The main circuit board plan, Figure 5B yes Figure 5A Magnified view of the circled part.

[0114] Reference Figures 3 to 5A In an embodiment, the bottom cover 400 may be disposed under the display panel 300. The bottom cover 400 may be attached to the lower surface of the display panel 300 by an adhesive member. The adhesive member may be a pressure sensitive adhesive ("PSA").

[0115] The vibration generator 510 may be disposed under the bottom cover 400. The vibration generator 510 may be attached to the lower surface of the bottom cover 400 by an adhesive member. The adhesive member may be PSA.

[0116] The vibration generator 510 may be electrically connected to the vibration driving circuit 340 for driving the vibration generator 510 through the flexible circuit board 520. Figure 3 As shown in FIG. 5 , the flexible circuit board 520 is flat, but the shape of the flexible circuit board 520 is not limited thereto. Alternatively, the flexible circuit board 520 may be a flexible printed circuit board that can be bent.

[0117] The display circuit board 310 may be Figure 3 The display circuit board 310 may be bent as shown in FIG. Figure 3 310a and the second connector 310b are shown. The first connector 310a can be connected to one end of the cable 314. The second connector 310b can be connected to one end of the flexible circuit board 520. The touch drive circuit 330 and the vibration drive circuit 340 can be arranged on the surface of the display circuit board 310, and the first connector 310a and the second connector 310b can be arranged on the back surface of the display circuit board 310 that is back to the surface thereof. The back surface of the display circuit board 310 can be a surface facing the bottom cover 400.

[0118] One end of the cable 314 may be connected to the first connector 310a. Figure 4 , Figure 5A and Figure 5B As shown in , the other end of the cable 314 may be connected to a main connector 730 of a main circuit board 700 disposed below the middle frame 600 , and a cable hole CAH is defined by the middle frame 600 .

[0119] One end of the flexible circuit board 520 may be connected to the second connector 310 b , and the other end of the flexible circuit board 520 may be provided with a pad portion including a pad electrically connected to the vibration generator 510 .

[0120] Figure 6 According to the embodiment along Figure 3 A cross-sectional view taken along line II' of Figure 7 yes Figure 6 An enlarged cross-sectional view of region A, Figure 8 It is shown Figure 6 A cross-sectional view of a display area of ​​a display panel.

[0121] Reference Figures 6 to 8 The display panel 300 may include a substrate SUB1 and a pixel array layer PAL. The pixel array layer PAL may include Figure 8The thin film transistor layer 303, the light emitting element layer 304 and the thin film encapsulation layer 305 shown in the figure. The display area of ​​the display panel 300 indicates the area in which the pixels of the light emitting element layer 304 are arranged to display the image, and the non-display area thereof indicates the peripheral area of ​​the display area. The substrate SUB1 may be a rigid substrate or a flexible substrate capable of bending, folding or curling, etc. The substrate SUB1 may include an insulating material (such as glass, quartz or polymer resin) or be made of an insulating material (such as glass, quartz or polymer resin). In an embodiment, the polymer resin may include polyethersulfone ("PES"), polyacrylate ("PA"), polyarylate ("PAR"), polyetherimide ("PEI"), polyethylene naphthalate ("PEN"), polyethylene terephthalate ("PET"), polyphenylene sulfide ("PPS"), polyallyl ester (compound), polyimide ("PI"), polycarbonate ("PC"), cellulose triacetate ("CAT"), cellulose acetate propionate ("CAP"), or a combination thereof. Alternatively, the substrate SUB1 may include a metal material.

[0122] The thin film transistor layer 303 is provided on the substrate SUB1 and includes a thin film transistor 335 , a gate insulating film 336 , an interlayer insulating film 337 , a protective film 338 , and a planarizing film 339 .

[0123] The buffer film 302 may be disposed on the substrate SUB1. The buffer film 302 may be formed on the substrate SUB1 to protect the thin film transistor 335 and the light emitting element, which are susceptible to moisture, from moisture that may penetrate through the substrate SUB1. The buffer film 302 may include or be formed of a plurality of alternately stacked inorganic films. In one embodiment, for example, the buffer film 302 may be formed in which layers including silicon oxide (SiO x ), silicon nitride (SiN x ) and silicon oxynitride (SiON) of one or more organic layers. Optionally, the buffer film 302 may be omitted.

[0124] The thin film transistors 335 are disposed on the buffer film 302. Each thin film transistor 335 includes an active layer 331, a gate electrode 332, a source electrode 333, and a drain electrode 334. Figure 8 As shown in , the thin film transistor 335 is formed by a top gate method in which the gate electrode 332 is positioned on the active layer 331, but the invention is not limited thereto. Alternatively, the thin film transistor 335 may be formed by a bottom gate method in which the gate electrode 332 is positioned below the active layer 331 or by a dual gate method in which the gate electrode 332 is positioned both above and below the active layer 331.

[0125] The active layer 331 is disposed on the buffer film 302. The active layer 331 may include or be formed of a silicon-based semiconductor material or an oxide-based semiconductor material. A light-blocking layer for blocking external light incident on the active layer 331 may be disposed between the buffer film 302 and the active layer 331.

[0126] The gate insulating film 336 may be disposed on the active layer 331. The gate insulating film 336 may include an inorganic film (eg, silicon oxide (SiO x ) film, silicon nitride (SiN x ) film or a multilayer film thereof) or an inorganic film (for example, silicon oxide (SiO x ) film, silicon nitride (SiN x ) film or a multilayer film thereof) is formed.

[0127] The gate electrode 332 and the gate line may be disposed on the gate insulating film 336. The gate electrode 332 and the gate line may include or be formed of a single layer or multiple layers including at least one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof.

[0128] The interlayer insulating film 337 may be disposed on the gate electrode 332 and the gate line. The interlayer insulating film 337 may include an inorganic film (eg, silicon oxide (SiO x ) film, silicon nitride (SiN x ) film or a multilayer film thereof) or an inorganic film (for example, silicon oxide (SiO x ) film, silicon nitride (SiN x ) film or a multilayer film thereof) is formed.

[0129] The source electrode 333, the drain electrode 334, and the data line may be disposed on the interlayer insulating film 337. Each of the source electrode 333 and the drain electrode 334 may be connected to the active layer 331 through a contact hole defined through the gate insulating film 336 and the interlayer insulating film 337. The source electrode 333, the drain electrode 334, and the data line may include or be formed of a single layer or multiple layers containing at least one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof.

[0130] A protective film 338 for insulating the thin film transistor 335 may be provided on the source electrode 333, the drain electrode 334, and the data line. The protective film 338 may include an inorganic film (eg, silicon oxide (SiO x ) film, silicon nitride (SiN x ) film or a multilayer film thereof) or an inorganic film (for example, silicon oxide (SiO x ) film, silicon nitride (SiN x ) film or a multilayer film thereof) is formed.

[0131] A planarization film 339 for planarizing a step caused by the thin film transistor 335 may be formed on the protective film 338. The planarization film 339 may include or be formed of an organic film including acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin.

[0132] The light emitting element layer 304 is disposed on the thin film transistor layer 303. The light emitting element layer 304 includes a light emitting element and a pixel defining film 344.

[0133] The light emitting element and the pixel defining film 344 are disposed on the planarization film 339. The light emitting element may be an organic light emitting element including an anode electrode 341, a light emitting layer 342, and a cathode electrode 343.

[0134] The anode electrode 341 may be disposed on the planarization film 339. The anode electrode 341 may be connected to the drain electrode 334 of the thin film transistor 335 through a contact hole defined through the protection film 338 and the planarization film 339.

[0135] The pixel definition film 344 may be disposed on the planarization film 339 to cover the edge of the anode electrode 341 to define the pixel. In such an embodiment, the pixel definition film 344 is used to define the pixel. Each pixel refers to a region in which the anode electrode 341, the light emitting layer 342, and the cathode electrode 343 are sequentially stacked, and holes from the anode electrode 341 and electrons from the cathode electrode 343 are combined with each other in the light emitting layer 342 to emit light.

[0136] The light-emitting layer 342 is disposed on the anode electrode 341 and the pixel defining film 344. The light-emitting layer 342 is an organic light-emitting layer. In an embodiment, the light-emitting layer 342 may emit one of red light, green light and blue light. In an optional embodiment, the light-emitting layer 342 may be a white light-emitting layer that emits white light. In such an embodiment, the light-emitting layer 342 may have a stacked structure of a red light-emitting layer, a green light-emitting layer and a blue light-emitting layer, and may be a common layer formed together in a pixel. In such an embodiment, the display panel 300 may also include separate color filters for displaying red, green and blue.

[0137] The light emitting layer 342 may include a hole transport layer, a light emitting layer, and an electron transport layer. In an embodiment, the light emitting layer 342 may have a series structure of two or more stacks, and in this case, a charge generation layer may be provided between the stacks.

[0138] The cathode electrode 343 is disposed on the light emitting layer 342. The cathode electrode 343 may be disposed to cover the light emitting layer 342. The cathode electrode 343 may be a common layer commonly formed in the pixel or be disposed to cover the entire pixel.

[0139] In an embodiment in which the light emitting element layer 304 is formed by a top emission method that emits light upward, the anode electrode 341 may include or be formed of a high reflectivity metal material such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and indium tin oxide ("ITO") (ITO / Al / ITO), or a stacked structure of an APC alloy and ITO (ITO / APC / ITO). The APC alloy refers to an alloy of silver (Ag), palladium (Pd), and copper (Cu). The cathode electrode 343 may include a light-transmitting transparent conductive material ("TCO") (such as ITO or indium zinc oxide ("IZO")) or a semi-transmitting conductive material (such as magnesium (Mg), silver (Ag) or an alloy of magnesium (Mg) and silver (Ag)), or be formed of a light-transmitting transparent conductive material ("TCO") (such as ITO or indium zinc oxide ("IZO")) or a semi-transmitting conductive material (such as magnesium (Mg), silver (Ag) or an alloy of magnesium (Mg) and silver (Ag)). In an embodiment in which the cathode electrode 343 includes a semi-transmitting conductive material or is formed of a semi-transmitting conductive material, the luminous efficiency can be improved by the microcavity effect.

[0140] In an embodiment in which the light emitting element layer 304 is formed by a bottom emission method in which light is emitted downward, the anode electrode 341 may include TCO (such as ITO or IZO) or a semi-transmissive conductive material (such as magnesium (Mg), silver (Ag) or an alloy of magnesium (Mg) and silver (Ag)), or be formed by TCO (such as ITO or IZO) or a semi-transmissive conductive material (such as magnesium (Mg), silver (Ag) or an alloy of magnesium (Mg) and silver (Ag)). The cathode electrode 343 may be formed by a high reflectivity metal material (such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (ITO / Al / ITO), an APC alloy or a stacked structure of an APC alloy and ITO (ITO / APC / ITO). In an embodiment in which the anode electrode 341 includes a semi-transmissive conductive material or is formed by a semi-transmissive conductive material, the light emitting efficiency may be improved by a microcavity effect.

[0141] The thin film encapsulation layer 305 is disposed on the light emitting element layer 304. In an embodiment, the thin film encapsulation layer 305 is used to prevent oxygen or moisture from penetrating the light emitting layer 342 and the cathode electrode 343. In such an embodiment, the thin film encapsulation layer 305 may include at least one inorganic film. The inorganic film may include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide or titanium oxide or may be formed by silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide or titanium oxide. The thin film encapsulation layer 305 may also include at least one organic film. The organic film may have a sufficient thickness to prevent foreign matter (particles) from penetrating the thin film encapsulation layer 305 and entering the light emitting layer 342 and the cathode electrode 343. The organic film may include at least one of epoxy resin, acrylate and urethane acrylate.

[0142] The touch sensor layer 306 may be disposed on the thin film encapsulation layer 305. In an embodiment, the touch sensor layer 306 may be directly formed on the thin film encapsulation layer 305 so that the thickness of the display device 10 may be reduced compared to a case where a separate touch panel is attached to the thin film encapsulation layer 305.

[0143] The touch sensor layer 306 may include a touch electrode for sensing the user's touch in a capacitive manner and a touch line for connecting the pad and the touch electrode. In one embodiment, for example, the touch sensor layer 306 may sense the user's touch in a self-capacitive manner or a mutual-capacitive manner.

[0144] The touch electrodes of the touch sensor layer 306 may be arranged in the display area, and the touch lines of the touch sensor layer 306 may be arranged in the non-display area.

[0145] like Figure 6 As shown in , the polarizing film PF may be disposed on the pixel array layer PAL of the display panel 300 to prevent degradation of visibility due to external light reflection. The polarizing film PF may include a linear polarizer and a phase delay film such as a quarter wave plate. In such an embodiment, the phase delay film may be disposed on the display panel 300, and the linear polarizer may be disposed between the phase delay film and the cover window 100.

[0146] The cover window 100 may be disposed on the polarizing film PF. The cover window 100 may be attached to the upper surface of the polarizing film PF by an adhesive member. The cover window 100 may be made of glass, sapphire and / or plastic. The cover window 100 may be rigid or flexible. The adhesive member may be an optically clear adhesive ("OCA") film or an optically clear resin ("OCR") film.

[0147] The bottom cover 400 may be disposed under the substrate SUB1 of the display panel 300. Figure 7As shown in FIG. 4 , the bottom cover 400 may include a light blocking film 410 for absorbing light incident from the outside, a buffer film 420 for absorbing external impact, and a heat dissipation film 430 for effectively radiating heat of the display panel 300 .

[0148] The light-blocking film 410 may be disposed under the display panel 300. The light-blocking film 410 suppresses transmission of light to prevent components disposed under the light-blocking film 410 (e.g., the display circuit board 310 and the vibration generator 510, etc.) from being viewed from above the display panel 300. The light-blocking film 410 may include, for example, a light-absorbing film including a black pigment or dye.

[0149] The buffer film 420 may be disposed below the light blocking film 410. The buffer film 420 absorbs external impact to prevent the display panel 300 from being damaged. The buffer film 420 may be formed as a single layer or multiple layers. In one embodiment, for example, the buffer film 420 may include a polymer resin (such as polyurethane, polycarbonate, polypropylene, or polyethylene) or be formed of a polymer resin (such as polyurethane, polycarbonate, polypropylene, or polyethylene), or may include an elastic material (such as rubber, urethane material, or a sponge formed by foaming an acrylic material) or be formed of an elastic material (such as rubber, urethane material, or a sponge formed by foaming an acrylic material). The buffer film 420 may be a cushion layer.

[0150] The heat dissipation film 430 may be disposed under the buffer film 420. The heat dissipation film 430 may include a first heat dissipation layer 432 including graphite or carbon nanotubes and a second heat dissipation layer 433 capable of blocking electromagnetic waves and including a metal thin film containing or formed of copper, nickel, ferrite, or silver having high thermal conductivity.

[0151] In the case where the vibration generator 510 is disposed on the heat dissipation film 430 of the bottom cover 400, the first heat dissipation layer 432 of the heat dissipation film 430 may be broken by the vibration of the vibration generator 510. Therefore, in an embodiment, the heat dissipation film 430 may be removed in the region where the vibration generator 510 is disposed, and the vibration generator 510 may be attached to the lower surface of the buffer film 420. Alternatively, the buffer film 420 and the heat dissipation film 430 may be removed in the region where the vibration generator 510 is disposed, and the vibration generator 510 may be attached to the lower surface of the light blocking film 410.

[0152] The first surface of the vibration generator 510 may be disposed on the buffer film 420, and the flexible circuit board 520 may be disposed on the second surface of the vibration generator 510 opposite to the first surface thereof. The electrodes of the vibration generator 510 may be electrically connected to the pads of the pad portion of the end of the flexible circuit board 520 located on the second surface of the vibration generator 510.

[0153] Fig. 9 Ultrasonic waves measured at twenty-five positions (1 to 25) of each of the front and rear surfaces of the display device 10 while outputting ultrasonic waves generated by vibrating the display panel 300 using the vibration generator 510 are shown. Fig. 9 (a) in FIG. 1 shows twenty-five positions (1 to 25) of each of the front surface and the rear surface of the display device 10, wherein ultrasonic waves are measured at the twenty-five positions (1 to 25), Fig. 9 (b) in FIG. 1 shows ultrasonic waves measured at twenty-five positions (1 to 25) on the front surface of the display device 10, Fig. 9 (c) in FIG. 1 shows ultrasonic waves measured at twenty-five positions (1 to 25) on the rear surface of the display device 10. Fig. 9 As shown in , ultrasonic waves are output not only to the front surface of the display device 10 but also to the rear surface of the display device 10. The ultrasonic waves output to the rear surface of the display device 10 may be reflected by the user's body and detected by the microphone 750 of the display device 10. That is, the ultrasonic waves output to the rear surface of the display device 10 as well as the ultrasonic waves output to the front surface of the display device 10 may be detected by the microphone 750. When the vibration generator 510 and the microphone 750 are used as a proximity sensor for detecting an object approaching the front surface of the display device 10, the ultrasonic waves output to the rear surface of the display device 10 may be noise.

[0154] In an embodiment, as described above, the ultrasonic wave output from the display device 10 may be detected by the microphone 750, but the invention is not limited thereto. In an embodiment, for example, the ultrasonic wave output from the display device 10 may be detected by an ultrasonic sensor or a micro speaker included in the display device 10. The ultrasonic sensor may be an ultrasonic fingerprint sensor capable of detecting ultrasonic waves.

[0155] In an embodiment of the invention, Figure 6 As shown in FIG. 1 , a first ultrasonic wave absorbing film 531 may be disposed on the second surface of the vibration generator 510 to reduce ultrasonic waves output to the rear surface of the display device 10. The first ultrasonic wave absorbing film 531 may be attached to the second surface of the vibration generator 510 using an adhesive member such as PSA.

[0156] The first ultrasonic wave absorbing film 531 may overlap the flexible circuit board 520 in the thickness direction (Z-axis direction) of the vibration generator 510. Figure 7As shown in , the first ultrasonic absorbing film 531 may be provided to cover the portion of the flexible circuit board 520 provided on the second surface of the vibration generator 510. Alternatively, the first ultrasonic absorbing film 531 may not overlap the flexible circuit board 520 in the thickness direction (Z-axis direction) of the vibration generator 510. In such an embodiment, the first ultrasonic absorbing film 531 may be provided not to cover the portion of the flexible circuit board 520 provided on the second surface of the vibration generator 510.

[0157] The first ultrasonic wave absorbing film 531 may include a high attenuation material or a high viscosity material for attenuating ultrasonic waves generated by the vibration of the vibration generator 510, or may be formed of a high attenuation material or a high viscosity material for attenuating ultrasonic waves generated by the vibration of the vibration generator 510. Alternatively, the first ultrasonic wave absorbing film 531 may have a multilayer structure in which each layer includes a low attenuation material or a low viscosity material to attenuate ultrasonic waves like a high attenuation material. The high attenuation material or the high viscosity material or the low attenuation material or the low viscosity material may include a material having attenuation (or weakening) with respect to ultrasonic waves having a frequency of 20 kilohertz (kHz) to 40 kHz, for example, silicon (Si).

[0158] Optionally, the first ultrasonic wave absorbing film 531 may include a porous foam and a sound absorbing film filled in the porous foam and used to absorb ultrasonic waves. In an embodiment, a plurality of holes are defined in the porous foam. Each of the plurality of holes may be connected to at least one of the adjacent holes. The size of the hole may not be constant and may be irregular. The porosity of the porous foam may be about 50% or more. The diameter of the hole may be in the range of about 1 millimeter (mm) to about 10 mm, but is not limited thereto. The hole may be filled with a sound absorbing film. The sound absorbing film may include a material having a high attenuation coefficient. In one embodiment, for example, the sound absorbing film may include epoxy resin. Alternatively, the sound absorbing film may include metal (e.g., tungsten, copper or aluminum) powder, ceramic (e.g., tungsten oxide or aluminum oxide) powder and carbon isotope (e.g., graphite, graphene, nanotubes, diamond) powder bonded by epoxy resin. Optionally, the sound absorbing film may include rubber.

[0159] According to an embodiment, Figure 6 and Figure 7 As shown in FIG. 1 , the first ultrasonic wave absorbing film 531 can absorb ultrasonic waves generated by vibrating the display panel 300 using the vibration generator 510. In such an embodiment in which the vibration generator 510 and the microphone 750 are used as a proximity sensor for detecting an object approaching the front surface of the display device 10, the detection accuracy of the proximity sensor can be improved.

[0160] Fig.10 It is shown Figure 6A cross-sectional view of an embodiment of a vibration generator, Fig.11 is a schematic diagram showing a method of vibrating a vibration layer provided between a first branch electrode and a second branch electrode of a vibration generator, Fig.12 and Fig.13 is a schematic diagram illustrating a method of vibrating a display panel by utilizing vibration of a vibration generator.

[0161] Reference Figures 10 to 13 The vibration generator 510 may be a piezoelectric element or a piezoelectric actuator for vibrating the display panel 300 using a piezoelectric material that contracts or expands according to a voltage applied thereto. The vibration generator 510 may include a vibration layer 511, a first electrode 512, and a second electrode 513. Figures 10 to 13 In the figure, for the convenience of illustration and description, the flexible circuit board 520 is omitted.

[0162] The first electrode 512 may include a first trunk electrode 5121 and a first branch electrode 5122. Fig.10 As shown in , the first trunk electrode 5121 may be disposed on at least one side surface of the vibration layer 511. Optionally, the first trunk electrode 5121 may be disposed to penetrate a portion of the vibration layer 511. The first trunk electrode 5121 may be disposed on an upper surface of the vibration layer 511. The first branch electrodes 5122 may branch from the first trunk electrode 5121. The first branch electrodes 5122 may be arranged in parallel with each other.

[0163] The second electrode 513 may include a second trunk electrode 5131 and a second branch electrode 5132. The second electrode 513 may be arranged to be spaced apart from the first electrode 512, and the second electrode 513 may be electrically isolated from the first electrode 512. The second trunk electrode 5131 may be arranged on at least one side surface of the vibration layer 511. In an embodiment, the first trunk electrode 5121 may be arranged on a first side surface of the vibration layer 511, and the second trunk electrode 5131 may be arranged on a second side surface of the vibration layer 511. Optionally, the second trunk electrode 5131 may be arranged to penetrate a portion of the vibration layer 511. The second trunk electrode 5131 may be arranged on an upper surface of the vibration layer 511. The second branch electrode 5132 may branch from the second trunk electrode 5131. The second branch electrodes 5132 may be arranged in parallel with each other.

[0164] The first branch electrode 5122 and the second branch electrode 5132 may be arranged parallel to each other in the horizontal direction (X-axis direction or Y-axis direction). In an embodiment, the first branch electrode 5122 and the second branch electrode 5132 may be arranged alternately in the vertical direction (Z-axis direction). In such an embodiment, the first branch electrode 5122 and the second branch electrode 5132 may be repeatedly arranged in the vertical direction (Z-axis direction) in the order of the first branch electrode 5122, the second branch electrode 5132, the first branch electrode 5122 and the second branch electrode 5132.

[0165] The first electrode 512 and the second electrode 513 may be connected to the pad of the flexible circuit board 520. The pad of the flexible circuit board 520 may be connected to portions of the first electrode 512 and the second electrode 513 located at the surface of the vibration generator 510.

[0166] The vibration layer 511 may be a piezoelectric element that is deformed according to a driving voltage applied to the first electrode 512 and a driving voltage applied to the second electrode 513. In an embodiment, the vibration layer 511 may include or be made of at least one of a piezoelectric material such as polyvinylidene fluoride ("PVDF") or lead zirconate titanate ("PZT") and an electroactive polymer.

[0167] Since the vibration layer 511 is formed at a high temperature, the first electrode 512 and the second electrode 513 may be formed of silver (Ag) or an alloy of silver (Ag) and palladium (Pd), both of which have a high melting point. In an embodiment in which the first electrode 512 and the second electrode 513 are formed of an alloy of silver (Ag) and palladium (Pd) to increase the melting point of the first electrode 512 and the second electrode 513, the content of silver (Ag) may be higher than the content of palladium (Pd).

[0168] The vibration layer 511 may be disposed between the first branch electrode 5122 and the second branch electrode 5132. The vibration layer 511 contracts or expands according to a difference between a driving voltage applied to the first branch electrode 5122 and a driving voltage applied to the second branch electrode 5132.

[0169] In an embodiment, Fig.10 and Fig.11As shown in , the polarity direction of the vibration layer 511 disposed between the first branch electrode 5122 and the second branch electrode 5132 disposed below the first branch electrode 5122 may be an upward direction (↑), the vibration layer 511 has a positive polarity in an upper region adjacent to the first branch electrode 5122, and has a negative polarity in a lower region adjacent to the second branch electrode 5132. In such an embodiment, the polarity direction of the vibration layer 511 disposed between the second branch electrode 5132 and the first branch electrode 5122 disposed below the second branch electrode 5132 may be a downward direction (↓), the vibration layer 511 has a negative polarity in an upper region adjacent to the second branch electrode 5132, and has a positive polarity in a lower region adjacent to the first branch electrode 5122. The polarity direction of the vibration layer 511 may be determined by a polarization process of applying an electric field to the vibration layer 511 using the first branch electrode 5122 and the second branch electrode 5132.

[0170] In an embodiment, Fig.11 As shown in , in the case where the polarity direction of the vibration layer 511 disposed between the first branch electrode 5122 and the second branch electrode 5132 disposed below the first branch electrode 5122 is an upward direction (↑), when a driving voltage having a positive polarity is applied to the first branch electrode 5122, and a driving voltage having a negative polarity is applied to the second branch electrode 5132, the vibration layer 511 may be contracted by a first force F1. The first force F1 may be a contraction force. In such an embodiment, when a driving voltage having a negative polarity is applied to the first branch electrode 5122, and a driving voltage having a positive polarity is applied to the second branch electrode 5132, the vibration layer 511 may be expanded by a second force F2. The second force F2 may be a tensile force. At the same time, the polarity direction refers to a direction from an area having a negative polarity to an area having a positive polarity.

[0171] Similarly, in a case where the polarity direction of the vibration layer 511 disposed between the second branch electrode 5132 and the first branch electrode 5122 disposed below the second branch electrode 5132 is in a downward direction (↓), when a driving voltage having a positive polarity is applied to the second branch electrode 5132 and a driving voltage having a negative polarity is applied to the first branch electrode 5122, the vibration layer 511 may expand due to a tensile force. In addition, when a driving voltage having a negative polarity is applied to the second branch electrode 5132 and a driving voltage having a positive polarity is applied to the first branch electrode 5122, the vibration layer 511 may contract due to a contraction force.

[0172] When the driving voltage applied to the first electrode 512 and the driving voltage applied to the second electrode 513 are repeated alternately with positive polarity and negative polarity, the vibration layer 511 is Fig.12 and Fig.13As shown in FIG. 5 , the vibration generator 510 repeats contraction and expansion. Therefore, the vibration generator 510 vibrates. Since the vibration generator 510 is disposed on one surface of the heat dissipation film 430, when the vibration layer 511 of the vibration generator 510 contracts and expands, as shown in FIG. Fig.12 and Fig.13 As shown in , the display panel 300 vibrates in the third direction (Z-axis direction) which is the thickness direction of the display panel 300 due to the force applied thereto by the vibration layer 511 .

[0173] The first electrode 512 of the vibration generator 510 may receive a first first driving voltage from the vibration driving circuit 340 through the flexible circuit board 520 in the sound mode. The second electrode 513 of the vibration generator 510 may receive a second first driving voltage from the vibration driving circuit 340 through the flexible circuit board 520 in the sound mode. Since the vibration generator 510 may vibrate the display panel 300 according to the first first driving voltage and the second first driving voltage, the display device 10 may output sound in the sound mode.

[0174] The first electrode 512 of the vibration generator 510 may receive the first second driving voltage from the vibration driving circuit 340 through the flexible circuit board 520 in the ultrasonic mode. The second electrode 513 of the vibration generator 510 may receive the second second driving voltage from the vibration driving circuit 340 through the flexible circuit board 520 in the ultrasonic mode. Since the vibration generator 510 may vibrate the display panel 300 according to the first second driving voltage and the second second driving voltage, the display device 10 may output ultrasonic waves in the ultrasonic mode.

[0175] In an embodiment, Fig.10 As shown in , a protective layer 519 may be provided on the second surface and the side surface of the vibration generator 510. The protective layer 519 may include an insulating material or be formed of an insulating material. The protective layer 519 may be provided on the first electrode 512, the second electrode 513, and the portion of the vibration layer 511 exposed by the first electrode 512 and the second electrode 513. The protective layer 519 may be provided to surround the first electrode 512, the second electrode 513, and the portion of the vibration layer 511 exposed by the first electrode 512 and the second electrode 513. Therefore, the vibration layer 511, the first electrode 512, and the second electrode 513 of the vibration generator 510 may be protected by the protective layer 519.

[0176] The first ultrasonic wave absorbing film 531 may be disposed on the lower surface of the protective layer 519. Therefore, ultrasonic waves output to the rear surface of the display device 10 may be absorbed by the first ultrasonic wave absorbing film 531.

[0177] According to an embodiment, Figures 10 to 13As shown in , the vibration generator 510 can vibrate the display panel 300 according to the first first driving voltage and the second first driving voltage in the sound mode to output the sound, and the vibration generator 510 can vibrate the display panel 300 according to the first second driving voltage and the second second driving voltage in the ultrasonic mode to output the ultrasonic wave. Since the ultrasonic wave output to the rear surface of the display device 10 can be absorbed by the first ultrasonic wave absorbing film 531, the amount of the ultrasonic wave entering the microphone 750 toward the rear surface of the display device 10 as noise can be reduced.

[0178] Fig.14 It is shown Figure 6 A cross-sectional view of an alternative embodiment of a vibration generator.

[0179] In addition to the vibration generator 510 including the sound output unit SU and the first ultrasonic wave output unit UU1, Fig.14 The embodiments shown in Fig.10 The embodiments shown in are basically the same.

[0180] Reference Fig.14 , an embodiment of the vibration generator 510 includes a sound output unit SU and a first ultrasonic output unit UU1. The sound output unit SU and the first ultrasonic output unit UU1 may be disposed to overlap each other in the thickness direction (Z-axis direction) of the vibration generator 510. The surface of the sound output unit SU and the surface of the first ultrasonic output unit UU1 may be in direct contact with each other.

[0181] In an embodiment where the sound output unit SU is defined by the lower portion of the vibration generator 510 and the first ultrasonic wave output unit UU1 is defined by the upper portion of the vibration generator 510, Fig.14 As shown in , the upper surface of the sound output unit SU and the lower surface of the first ultrasonic output unit UU1 can be in direct contact with each other. Alternatively, the sound output unit SU is defined by the upper portion of the vibration generator 510 and the first ultrasonic output unit UU1 is defined by the lower portion of the vibration generator 510, so that the lower surface of the sound output unit SU and the upper surface of the first ultrasonic output unit UU1 can be in direct contact with each other.

[0182] The sound output unit SU may include a first vibration layer 5111 , a first electrode 512 , and a second electrode 513 . The first ultrasonic wave output unit UU1 may include a second vibration layer 5112 , a third electrode 514 , and a fourth electrode 515 .

[0183] The first electrode 512 may include a first trunk electrode 5121 and a first branch electrode 5122. Fig.14As shown in , the first trunk electrode 5121 may be disposed on at least one side surface of the first vibration layer 5111. Optionally, the first trunk electrode 5121 may be disposed to pass through a portion of the first vibration layer 5111. The first branch electrodes 5122 may branch from the first trunk electrode 5121. The first branch electrodes 5122 may be arranged parallel to each other.

[0184] The second electrode 513 may include a second trunk electrode 5131 and a second branch electrode 5132. The second electrode 513 may be arranged to be spaced apart from the first electrode 512. Therefore, the second electrode 513 may be electrically isolated from the first electrode 512. The second trunk electrode 5131 may be arranged on at least one side surface of the first vibration layer 5111. In one embodiment, for example, the first trunk electrode 5121 may be arranged on a first side surface of the first vibration layer 5111, and the second trunk electrode 5131 may be arranged on a second side surface of the first vibration layer 5111. Optionally, the second trunk electrode 5131 may be arranged to pass through a portion of the first vibration layer 5111. The second branch electrode 5132 may branch from the second trunk electrode 5131. The second branch electrodes 5132 may be arranged in parallel with each other.

[0185] The first trunk electrode 5121 and the second trunk electrode 5131 may extend in the thickness direction (Z-axis direction) of the vibration generator 510 and may be arranged in parallel with each other. The first branch electrode 5122 and the second branch electrode 5132 may extend in the horizontal direction (X-axis direction or Y-axis direction) and may be arranged in parallel with each other. In an embodiment, the first branch electrode 5122 and the second branch electrode 5132 may be arranged alternately in the vertical direction (Z-axis direction). In such an embodiment, the first branch electrode 5122 and the second branch electrode 5132 may be repeatedly arranged in the vertical direction (Z-axis direction) in the order of the first branch electrode 5122, the second branch electrode 5132, the first branch electrode 5122 and the second branch electrode 5132.

[0186] The third electrode 514 may include a third trunk electrode 5141 and a third branch electrode 5142. Fig.14 As shown in , the third trunk electrode 5141 may be disposed on at least one side surface of the second vibration layer 5112. Optionally, the third trunk electrode 5141 may be disposed to pass through a portion of the second vibration layer 5112. The third branch electrodes 5142 may branch from the third trunk electrode 5141. The third branch electrodes 5142 may be arranged in parallel with each other.

[0187] The fourth electrode 515 may include a fourth trunk electrode 5151 and a fourth branch electrode 5152. The fourth electrode 515 may be disposed to be spaced apart from the third electrode 514. Therefore, the fourth electrode 515 may be electrically isolated from the third electrode 514. The fourth trunk electrode 5151 may be disposed on at least one side surface of the second vibration layer 5112. In one embodiment, for example, the third trunk electrode 5141 may be disposed on a first side surface of the second vibration layer 5112, and the third trunk electrode 5141 may be disposed on a second side surface of the second vibration layer 5112. Alternatively, the fourth trunk electrode 5151 may be disposed on a third side surface of the second vibration layer 5112, and the fourth trunk electrode 5151 may be disposed on a fourth side surface of the second vibration layer 5112. In such an embodiment, the first trunk electrode 5121, the second trunk electrode 5131, the third trunk electrode 5141, and the fourth trunk electrode 5151 may be disposed on different side surfaces of the vibration layers 5111 and 5112. Optionally, the fourth trunk electrode 5151 may be disposed to pass through a portion of the second vibration layer 5112. The fourth branch electrodes 5152 may branch from the fourth trunk electrode 5151. The fourth branch electrodes 5152 may be arranged in parallel with each other.

[0188] The third branch electrode 5142 and the fourth branch electrode 5152 may be arranged parallel to each other in the horizontal direction (X-axis direction or Y-axis direction). In an embodiment, the third branch electrode 5142 and the fourth branch electrode 5152 may be arranged alternately in the vertical direction (Z-axis direction). In such an embodiment, the third branch electrode 5142 and the fourth branch electrode 5152 may be repeatedly arranged in the vertical direction (Z-axis direction) in the order of the third branch electrode 5142, the fourth branch electrode 5152, the third branch electrode 5142 and the fourth branch electrode 5152.

[0189] The first electrode 512, the second electrode 513, the third electrode 514, and the fourth electrode 515 may be connected to the pad of the flexible circuit board 520. The pad of the flexible circuit board 520 may be connected to portions of the first electrode 512, the second electrode 513, the third electrode 514, and the fourth electrode 515 located at the surface of the vibration generator 510.

[0190] In an embodiment, the first vibration layer 5111 may be a piezoelectric element that is deformed based on a driving voltage applied to the first electrode 512 and a driving voltage applied to the second electrode 513, and the second vibration layer 5112 may be a piezoelectric element that is deformed based on a driving voltage applied to the third electrode 514 and a driving voltage applied to the fourth electrode 515. In such an embodiment, each of the first vibration layer 5111 and the second vibration layer 5112 may include or be made of any one of a piezoelectric material (such as PVDF or PZT) and an electroactive polymer. The first vibration layer 5111 and the second vibration layer 5112 may be formed separately and then attached to each other by an adhesive member such as PSA. Alternatively, the first vibration layer 5111 and the second vibration layer 5112 may be formed integrally as a single integral unit.

[0191] Since the first vibration layer 5111 and the second vibration layer 5112 are formed at a high temperature, the first electrode 512, the second electrode 513, the third electrode 514, and the fourth electrode 515 may be formed of silver (Ag) or an alloy of silver (Ag) and palladium (Pd), each having a high melting point. In an embodiment in which the first electrode 512, the second electrode 513, the third electrode 514, and the fourth electrode 515 are formed of an alloy of silver (Ag) and palladium (Pd) to increase the melting point thereof, the content of silver (Ag) may be higher than the content of palladium (Pd).

[0192] The first vibration layer 5111 may shrink or expand according to the driving voltage applied to the first electrode 512 and the second electrode 513. The second vibration layer 5112 may shrink or expand according to the driving voltage applied to the third electrode 514 and the fourth electrode 515. Such shrinkage and expansion of the first vibration layer 5111 and the shrinkage and expansion of the second vibration layer 5112 are similar to those described above with reference to Figures 11 to 13 Those described are substantially the same and any repeated detailed description thereof will be omitted.

[0193] The first electrode 512 of the vibration generator 510 may receive a first first driving voltage from the vibration driving circuit 340 through the flexible circuit board 520 in the sound mode. The second electrode 513 of the vibration generator 510 may receive a second first driving voltage from the vibration driving circuit 340 through the flexible circuit board 520 in the sound mode. Since the sound output unit SU of the vibration generator 510 may vibrate the display panel 300 according to the first first driving voltage and the second first driving voltage, the display device 10 may output sound in the sound mode.

[0194] The third electrode 514 of the vibration generator 510 may receive the first second driving voltage from the vibration driving circuit 340 through the flexible circuit board 520 in the ultrasonic mode. The fourth electrode 515 of the vibration generator 510 may receive the second second driving voltage from the vibration driving circuit 340 through the flexible circuit board 520 in the ultrasonic mode. Since the first ultrasonic output unit UU1 of the vibration generator 510 may vibrate the display panel 300 according to the first second driving voltage and the second second driving voltage, the display device 10 may output ultrasonic waves in the ultrasonic mode.

[0195] Since the sound pressure level ("SPL") of the sound output from the sound output unit SU is proportional to the area of ​​the sound output unit SU, the area of ​​the sound output unit SU may be greater than the area of ​​the first ultrasonic output unit UU1, and the area of ​​the first vibration layer 5111 may be greater than the area of ​​the second vibration layer 5112. In such an embodiment, since the number of branch electrodes may be proportional to the area of ​​the vibration layer, the number of the first branch electrodes 5122 and the number of the second branch electrodes 5132 may be greater than the number of the third branch electrodes 5142 and the number of the fourth branch electrodes 5152, respectively. In such an embodiment, the lengths of the third trunk electrode 5141 and the fourth trunk electrode 5151 in the thickness direction (Z-axis direction) of the vibration generator 510 may be shorter than the lengths of the first trunk electrode 5121 and the second trunk electrode 5131 in the thickness direction (Z-axis direction) of the vibration generator 510, respectively.

[0196] The protective layer 519 may be disposed on the second surface and the side surface of the vibration generator 510. The protective layer 519 may include an insulating material or be formed of an insulating material. The protective layer 519 may be disposed on the first electrode 512, the second electrode 513, the third electrode 514, the fourth electrode 515, the portion of the first vibration layer 5111 exposed by the first electrode 512 and the second electrode 513, and the portion of the second vibration layer 5112 exposed by the third electrode 514 and the fourth electrode 515. Therefore, the first vibration layer 5111, the second vibration layer 5112, the first electrode 512, the second electrode 513, the third electrode 514, and the fourth electrode 515 of the vibration generator 510 may be protected by the protective layer 519.

[0197] The first ultrasonic wave absorbing film 531 may be disposed on the lower surface of the protective layer 519. The first ultrasonic wave absorbing film 531 may be disposed to overlap the sound output unit SU and the first ultrasonic wave output unit UU1 in the thickness direction (Z-axis direction) of the vibration generator 510. Therefore, when ultrasonic waves generated by vibrating the display panel 300 using the first ultrasonic wave output unit UU1 of the vibration generator 510 travel toward the rear surface of the display panel 300, such ultrasonic waves may be absorbed by the first ultrasonic wave absorbing film 531.

[0198] In an embodiment in which the protective layer 519 is omitted in the second surface of the vibration generator 510, the first vibration layer 5111, the first electrode 512 and the second electrode 513 can be protected by the first ultrasonic absorption film 531, and thus the protective layer 519 arranged to overlap with the first ultrasonic absorption film 531 in the thickness direction (Z-axis direction) of the display panel 300 can be omitted.

[0199] According to an embodiment, Fig.14 As shown in , the vibration generator 510 can vibrate the display panel 300 based on the first first driving voltage and the second first driving voltage in the sound mode to output sound, and the vibration generator 510 can vibrate the display panel 300 based on the first second driving voltage and the second second driving voltage in the ultrasonic mode to output ultrasonic waves. In such an embodiment, since the vibration generator 510 is divided into the sound output unit SU and the first ultrasonic output unit UU1, the sound output in the sound mode and the ultrasonic output in the ultrasonic mode can be effectively performed. In such an embodiment, since the ultrasonic wave output to the rear surface of the display device 10 can be absorbed by the first ultrasonic wave absorbing film 531, the amount of ultrasonic waves entering the microphone 750 as noise toward the rear surface of the display device 10 can be reduced.

[0200] Fig.15 It is shown Figure 6 A cross-sectional view of another optional embodiment of a vibration generator.

[0201] In addition to the vibration generator 510, the second ultrasonic output unit UU2 is also included. Fig.15 The embodiments shown in Fig.14 The embodiments shown in are basically the same. Fig.15 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.14 For embodiments of the present invention, the same figure numbers are used as the figure numbers, and any repeated detailed description thereof will be omitted or simplified hereinafter.

[0202] Reference Fig.15 , the vibration generator 510 may include a sound output unit SU, a first ultrasonic output unit UU1, and a second ultrasonic output unit UU2. The sound output unit SU, the first ultrasonic output unit UU1, and the second ultrasonic output unit UU2 may be arranged to overlap each other in the thickness direction (Z-axis direction) of the vibration generator 510. The surface of the sound output unit SU and the surface of the first ultrasonic output unit UU1 may be in direct contact with each other, and the back-facing surface of the sound output unit SU and the surface of the second ultrasonic output unit UU2 may be in direct contact with each other.

[0203] In an embodiment where the sound output unit SU is defined by the central portion of the vibration generator 510, as shown in FIG. Fig.15 As shown in , the first ultrasonic output unit UU1 is defined by the upper part of the vibration generator 510, the second ultrasonic output unit UU2 is defined by the lower part of the vibration generator 510, the upper surface of the sound output unit SU and the lower surface of the first ultrasonic output unit UU1 can be in direct contact with each other, and the lower surface of the sound output unit SU and the upper surface of the second ultrasonic output unit UU2 can be in direct contact with each other.

[0204] The sound output unit SU may include a first vibration layer 5111, a first electrode 512, and a second electrode 513. The first ultrasonic output unit UU1 may include a second vibration layer 5112, a third electrode 514, and a fourth electrode 515. The second ultrasonic output unit UU2 may include a third vibration layer 5113, a fifth electrode 516, and a sixth electrode 517. Since the first vibration layer 5111, the first electrode 512, and the second electrode 513 of the sound output unit SU and the second vibration layer 5112, the third electrode 514, and the fourth electrode 515 of the first ultrasonic output unit UU1 are the same as those described above. Fig.14 Those described are substantially the same, and thus any repeated detailed description thereof will be omitted.

[0205] In an embodiment, Fig.15 As shown in , the fifth electrode 516 may include a fifth trunk electrode 5161 and a fifth branch electrode 5162. Fig.15 As shown in , the fifth trunk electrode 5161 may be disposed on at least one side surface of the third vibration layer 5113. Optionally, the fifth trunk electrode 5161 may be disposed to pass through a portion of the third vibration layer 5113. The fifth branch electrodes 5162 may branch from the fifth trunk electrode 5161. The fifth branch electrodes 5162 may be arranged in parallel with each other.

[0206] The sixth electrode 517 may include a sixth trunk electrode 5171 and a sixth branch electrode 5172. The sixth electrode 517 may be disposed to be spaced apart from the fifth electrode 516. Therefore, the sixth electrode 517 may be electrically isolated from the fifth electrode 516. The sixth trunk electrode 5171 may be disposed on at least one side surface of the third vibration layer 5113. In one embodiment, for example, the fifth trunk electrode 5161 may be disposed on a first side surface of the third vibration layer 5113, and the fifth trunk electrode 5161 may be disposed on a second side surface of the third vibration layer 5113. Alternatively, the sixth trunk electrode 5171 may be disposed on a third side surface of the third vibration layer 5113, and the sixth trunk electrode 5171 may be disposed on a fourth side surface of the third vibration layer 5113. The third trunk electrode 5141 and the fifth trunk electrode 5161 may be disposed on the same side surface as each other, and the fourth trunk electrode 5151 and the sixth trunk electrode 5171 may be disposed on the same side surface as each other. Optionally, the sixth trunk electrode 5171 may be disposed to pass through a portion of the third vibration layer 5113. The sixth branch electrodes 5172 may branch from the sixth trunk electrode 5171. The sixth branch electrodes 5172 may be arranged in parallel with each other.

[0207] The fifth branch electrode 5162 and the sixth branch electrode 5172 may be arranged parallel to each other in the horizontal direction (X-axis direction or Y-axis direction). In an embodiment, the fifth branch electrode 5162 and the sixth branch electrode 5172 may be arranged alternately in the vertical direction (Z-axis direction). In such an embodiment, the fifth branch electrode 5162 and the sixth branch electrode 5172 may be repeatedly arranged in the vertical direction (Z-axis direction) in the order of the fifth branch electrode 5162, the sixth branch electrode 5172, the fifth branch electrode 5162 and the sixth branch electrode 5172.

[0208] The first electrode 512, the second electrode 513, the third electrode 514, the fourth electrode 515, the fifth electrode 516, and the sixth electrode 517 may be connected to the pad of the flexible circuit board 520. The pad of the flexible circuit board 520 may be connected to portions of the first electrode 512, the second electrode 513, the third electrode 514, the fourth electrode 515, the fifth electrode 516, and the sixth electrode 517 located at the surface of the vibration generator 510.

[0209] Since the first vibration layer 5111, the second vibration layer 5112, and the third vibration layer 5113 are formed at a high temperature, the first electrode 512, the second electrode 513, the third electrode 514, the fourth electrode 515, the fifth electrode 516, and the sixth electrode 517 may include silver (Ag) or an alloy of silver (Ag) and palladium (Pd) each having a high melting point, or be formed of silver (Ag) or an alloy of silver (Ag) and palladium (Pd) each having a high melting point. When the first electrode 512, the second electrode 513, the third electrode 514, the fourth electrode 515, the fifth electrode 516, and the sixth electrode 517 are formed of an alloy of silver (Ag) and palladium (Pd) to increase the melting point thereof, the content of silver (Ag) may be higher than the content of palladium (Pd).

[0210] The first vibration layer 5111 may shrink or expand according to the driving voltage applied to the first electrode 512 and the second electrode 513. The second vibration layer 5112 may shrink or expand according to the driving voltage applied to the third electrode 514 and the fourth electrode 515. The third vibration layer 5113 may shrink or expand according to the driving voltage applied to the fifth electrode 516 and the sixth electrode 517. Since the shrinkage and expansion of the first vibration layer 5111, the shrinkage and expansion of the second vibration layer 5112, and the shrinkage and expansion of the third vibration layer 5113 are similar to those described above with reference to Figures 11 to 13 Those described are substantially the same, and thus any repeated detailed description thereof will be omitted.

[0211] The first electrode 512 of the vibration generator 510 may receive a first first driving voltage from the vibration driving circuit 340 through the flexible circuit board 520 in the sound mode. The second electrode 513 of the vibration generator 510 may receive a second first driving voltage from the vibration driving circuit 340 through the flexible circuit board 520 in the sound mode. Since the sound output unit SU of the vibration generator 510 may vibrate the display panel 300 according to the first first driving voltage and the second first driving voltage, the display device 10 may output sound in the sound mode.

[0212] The third electrode 514 and the fifth electrode 516 of the vibration generator 510 may receive the first and second driving voltages from the vibration driving circuit 340 through the flexible circuit board 520 in the ultrasonic mode. The fourth electrode 515 and the sixth electrode 517 of the vibration generator 510 may receive the second and second driving voltages from the vibration driving circuit 340 in the ultrasonic mode through the flexible circuit board 520. Since the first and second ultrasonic output units UU1 and UU2 of the vibration generator 510 may vibrate the display panel 300 according to the first and second driving voltages and the second and second driving voltages, the display device 10 may output ultrasonic waves in the ultrasonic mode.

[0213] Since the SPL of the sound output from the sound output unit SU is proportional to the area of ​​the sound output unit SU, the area of ​​the sound output unit SU may be greater than the area of ​​each of the first ultrasonic output unit UU1 and the second ultrasonic output unit UU2. In such an embodiment, the area of ​​the first vibration layer 5111 may be greater than the area of ​​each of the second vibration layer 5112 and the third vibration layer 5113. In such an embodiment, since the number of branch electrodes may be proportional to the area of ​​the vibration layer, the number of the first branch electrodes 5122 and the number of the second branch electrodes 5132 may be greater than the number of the third branch electrodes 5142, the number of the fourth branch electrodes 5152, the number of the fifth branch electrodes 5162, and the number of the sixth branch electrodes 5172, respectively. In such an embodiment, the length of the fifth trunk electrode 5161 in the thickness direction (Z-axis direction) of the vibration generator 510 and the length of the sixth trunk electrode 5171 in the thickness direction (Z-axis direction) of the vibration generator 510 can be shorter than the length of the first trunk electrode 5121 in the thickness direction (Z-axis direction) of the vibration generator 510 and the length of the second trunk electrode 5131 in the thickness direction (Z-axis direction) of the vibration generator 510, respectively.

[0214] The protective layer 519 may be disposed on the second surface and the side surface of the vibration generator 510. The protective layer 519 may include an insulating material or be formed of an insulating material. The protective layer 519 may be disposed on the first electrode 512, the second electrode 513, the third electrode 514, the fourth electrode 515, the fifth electrode 516, the sixth electrode 517, a portion of the first vibration layer 5111 exposed by the first electrode 512 and the second electrode 513, a portion of the second vibration layer 5112 exposed by the third electrode 514 and the fourth electrode 515, and a portion of the third vibration layer 5113 exposed by the fifth electrode 516 and the sixth electrode 517. The protective layer 519 may be disposed around the first electrode 512, the second electrode 513, the third electrode 514, the fourth electrode 515, the fifth electrode 516, the sixth electrode 517, a portion of the first vibration layer 5111 exposed by the first electrode 512 and the second electrode 513, a portion of the second vibration layer 5112 exposed by the third electrode 514 and the fourth electrode 515, and a portion of the third vibration layer 5113 exposed by the fifth electrode 516 and the sixth electrode 517. Therefore, the first vibration layer 5111, the second vibration layer 5112, the third vibration layer 5113, the first electrode 512, the second electrode 513, the third electrode 514, the fourth electrode 515, the fifth electrode 516, and the sixth electrode 517 of the vibration generator 510 may be protected by the protective layer 519.

[0215] The first ultrasonic wave absorbing film 531 may be disposed on the lower surface of the protective layer 519. The first ultrasonic wave absorbing film 531 may be disposed to overlap the sound output unit SU, the first ultrasonic wave output unit UU1, and the second ultrasonic wave output unit UU2 in the thickness direction (Z-axis direction) of the vibration generator 510. Therefore, when ultrasonic waves generated by vibrating the display panel 300 using the first ultrasonic wave output unit UU1 and the second ultrasonic wave output unit UU2 of the vibration generator 510 travel toward the rear surface of the display panel 300, such ultrasonic waves may be absorbed by the first ultrasonic wave absorbing film 531.

[0216] In an embodiment in which the protective layer 519 is omitted in the second surface of the vibration generator 510, the third vibration layer 5113, the fifth electrode 516 and the sixth electrode 517 can be protected by the first ultrasonic absorption film 531, and thus the protective layer 519 arranged to overlap with the first ultrasonic absorption film 531 in the thickness direction (Z-axis direction) of the display panel 300 can be omitted.

[0217] According to an embodiment, Fig.15 As shown in , the vibration generator 510 can vibrate the display panel 300 according to the first first driving voltage and the second first driving voltage in the sound mode, thereby outputting sound, and the vibration generator 510 can vibrate the display panel 300 according to the first second driving voltage and the second second driving voltage in the ultrasonic mode, thereby outputting ultrasonic waves. In such an embodiment, since the vibration generator 510 is divided into the sound output unit SU, the first ultrasonic output unit UU1 and the second ultrasonic output unit UU2, the sound output in the sound mode and the ultrasonic output in the ultrasonic mode can be effectively performed. In such an embodiment, since the vibration generator 510 includes two ultrasonic output units UU1 and UU2, ultrasonic waves can be output at a high SPL compared to the case where the vibration generator 510 includes a single ultrasonic output unit. In such an embodiment, since the ultrasonic waves output to the rear surface of the display device 10 can be absorbed by the first ultrasonic absorbing film 531, the amount of ultrasonic waves entering the microphone 750 as noise toward the rear surface of the display device 10 can be reduced.

[0218] Fig.16 It is shown Figure 6 A cross-sectional view of another optional embodiment of a vibration generator.

[0219] In addition to the fact that the sound output unit SU and the first ultrasonic wave output unit UU1 are arranged to overlap each other in the first direction (X-axis direction), Fig.16 The embodiments shown in Fig.14 The embodiments shown in are basically the same. Fig.16 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.14 For embodiments of the present invention, the same figure numbers are used as the figure numbers, and any repeated detailed description thereof will be omitted or simplified hereinafter.

[0220] Reference Fig.16 , the vibration generator 510 may include a sound output unit SU and a first ultrasonic output unit UU1. The sound output unit SU and the first ultrasonic output unit UU1 may be arranged to overlap each other in a first direction (X-axis direction). The surface of the sound output unit SU and the surface of the first ultrasonic output unit UU1 may be in direct contact with each other. In such an embodiment, Fig.16 As shown in , the sound output unit SU is defined by the left portion of the vibration generator 510, the first ultrasonic output unit UU1 is defined by the right portion of the vibration generator 510, and the right side surface of the sound output unit SU and the left side surface of the first ultrasonic output unit UU1 can be in direct contact with each other. Optionally, the sound output unit SU is defined by the right side portion of the vibration generator 510, the first ultrasonic output unit UU1 is defined by the left side portion of the vibration generator 510, and the left side surface of the sound output unit SU and the right side surface of the first ultrasonic output unit UU1 can be in direct contact with each other.

[0221] The sound output unit SU may include a first vibration layer 5111 , a first electrode 512 , and a second electrode 513 . The first ultrasonic wave output unit UU1 may include a second vibration layer 5112 , a third electrode 514 , and a fourth electrode 515 .

[0222] In such an embodiment, since one side surface of the first vibration layer 5111 and one side surface of the second vibration layer 5112 are in direct contact with each other, in addition to the sound output unit SU being arranged to overlap with the first ultrasonic output unit UU1 in the first direction (X-axis direction), the first vibration layer 5111, the first electrode 512, and the second electrode 513 of the sound output unit SU are similar to those described above with reference to FIG. Fig.14 Those described are substantially the same. Therefore, any repeated detailed description thereof will be omitted.

[0223] In such an embodiment, since one side surface of the first vibration layer 5111 and one side surface of the second vibration layer 5112 are in direct contact with each other, in addition to the first ultrasonic output unit UU1 being arranged to overlap the sound output unit SU in the first direction (X-axis direction), the second vibration layer 5112, the third electrode 514, and the fourth electrode 515 of the first ultrasonic output unit UU1 are the same as those described above with reference to FIG. Fig.14 Those described are substantially the same. Therefore, any repeated detailed description thereof will be omitted.

[0224] Since the SPL of the sound output from the sound output unit SU is proportional to the area of ​​the sound output unit SU, the area of ​​the sound output unit SU may be greater than the area of ​​the first ultrasonic output unit UU1, and the area of ​​the first vibration layer 5111 may be greater than the area of ​​the second vibration layer 5112. In such an embodiment, the length of the first branch electrode 5122 of the first electrode 512 in the first direction (X-axis direction) and the length of the second branch electrode 5132 of the second electrode 513 in the first direction (X-axis direction) may be longer than the length of the third branch electrode 5142 of the third electrode 514 in the first direction (X-axis direction) and the length of the fourth branch electrode 5152 of the fourth electrode 515 in the first direction (X-axis direction), respectively.

[0225] The first ultrasonic wave absorbing film 531 may be disposed on the lower surface of the protective layer 519. The first ultrasonic wave absorbing film 531 may be disposed to overlap with the first ultrasonic wave output unit UU1 in the thickness direction (Z-axis direction) of the vibration generator 510. The first ultrasonic wave absorbing film 531 may not overlap with the sound output unit SU in the thickness direction (Z-axis direction) of the vibration generator 510. Therefore, when ultrasonic waves generated by vibrating the display panel 300 using the first ultrasonic wave output unit UU1 of the vibration generator 510 travel toward the rear surface of the display panel 300, such ultrasonic waves may be absorbed by the first ultrasonic wave absorbing film 531.

[0226] In an embodiment in which the protective layer 519 is omitted in the second surface of the vibration generator 510, the second vibration layer 5112, the third electrode 514 and the fourth electrode 515 can be protected by the first ultrasonic absorption film 531, and thus the protective layer 519 arranged to overlap with the first ultrasonic absorption film 531 in the thickness direction (Z-axis direction) of the display panel 300 can be omitted.

[0227] According to an embodiment, Fig.16 As shown in , the vibration generator 510 can vibrate the display panel 300 according to the first first driving voltage and the second first driving voltage in the sound mode, thereby outputting sound, and the vibration generator 510 can vibrate the display panel 300 according to the first second driving voltage and the second second driving voltage in the ultrasonic mode, thereby outputting ultrasonic waves. In such an embodiment, since the vibration generator 510 is divided into the sound output unit SU and the first ultrasonic output unit UU1, the sound output in the sound mode and the ultrasonic output in the ultrasonic mode can be effectively performed. In such an embodiment, since the ultrasonic wave output to the rear surface of the display device 10 can be absorbed by the first ultrasonic wave absorbing film 531, the amount of ultrasonic waves entering the microphone 750 toward the rear surface of the display device 10 as noise can be reduced.

[0228] Fig.17 It is shown Figure 6 A cross-sectional view of another optional embodiment of a vibration generator.

[0229] Except that the first ultrasonic wave absorbing film 531 overlaps the sound output unit SU in the thickness direction (Z-axis direction) of the vibration generator 510, Fig.17 The embodiments shown in Fig.16 The embodiments shown in are basically the same. Fig.17 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.16 The same figure numbers are used for the embodiments of the present invention, and any repeated detailed description thereof will be omitted hereinafter.

[0230] Fig.18 It is shown Figure 6 A cross-sectional view of another optional embodiment of a vibration generator.

[0231] In addition to the fact that the sound output unit SU, the first ultrasonic output unit UU1, and the second ultrasonic output unit UU2 are arranged to overlap each other in the first direction (X-axis direction), Fig.18 The embodiments shown in Fig.15 The embodiments shown in are basically the same. Fig.18 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.15 For embodiments of the present invention, the same figure numbers are used as the figure numbers, and any repeated detailed description thereof will be omitted or simplified hereinafter.

[0232] Reference Fig.18 , the vibration generator 510 may include a sound output unit SU, a first ultrasonic output unit UU1, and a second ultrasonic output unit UU2. The sound output unit SU, the first ultrasonic output unit UU1, and the second ultrasonic output unit UU2 may be arranged to overlap each other in a first direction (X-axis direction). The surface of the sound output unit SU and the surface of the first ultrasonic output unit UU1 may be in direct contact with each other, and the other surface of the sound output unit SU and the surface of the second ultrasonic output unit UU2 may be in direct contact with each other. In such an embodiment, Fig.18 As shown in , the sound output unit SU is defined by the central portion of the vibration generator 510, the first ultrasonic output unit UU1 is defined by the right portion of the vibration generator 510, and the second ultrasonic output unit UU2 is defined by the left portion of the vibration generator 510. The right side surface of the sound output unit SU and the left side surface of the first ultrasonic output unit UU1 can be in direct contact with each other, and the left side surface of the sound output unit SU and the right side surface of the second ultrasonic output unit UU2 can be in direct contact with each other.

[0233] The sound output unit SU may include a first vibration layer 5111, a first electrode 512, and a second electrode 513. The first ultrasonic output unit UU1 may include a second vibration layer 5112, a third electrode 514, and a fourth electrode 515. The second ultrasonic output unit UU2 may include a third vibration layer 5113, a fifth electrode 516, and a sixth electrode 517.

[0234] In such an embodiment, the first vibration layer 5111, the first electrode 512 and the second electrode 513 of the sound output unit SU and the second vibration layer 5112, the third electrode 514 and the fourth electrode 515 of the first ultrasonic output unit UU1 are the same as those described above. Fig.16 Those described are substantially the same and any repeated detailed description thereof will be omitted.

[0235] In such an embodiment, because the other side surface of the first vibration layer 5111 and the other side surface of the third vibration layer 5113 are in direct contact with each other, in addition to the second ultrasonic output unit UU2 being arranged to overlap the sound output unit SU and the first ultrasonic output unit UU1 in the first direction (X-axis direction), the third vibration layer 5113, the fifth electrode 516, and the sixth electrode 517 of the second ultrasonic output unit UU2 are the same as those described above with reference to FIG. Fig.15 Those described are substantially the same. Therefore, any repeated detailed description thereof will be omitted.

[0236] In an embodiment, since the SPL of the sound output from the sound output unit SU is proportional to the area of ​​the sound output unit SU, the area of ​​the sound output unit SU may be greater than the area of ​​each of the first ultrasonic output unit UU1 and the second ultrasonic output unit UU2. In addition, the area of ​​the first vibration layer 5111 may be greater than the area of ​​each of the second vibration layer 5112 and the third vibration layer 5113. In such an embodiment, the length of the first branch electrode 5122 of the first electrode 512 in the first direction (X-axis direction) and the length of the second branch electrode 5132 of the second electrode 513 in the first direction (X-axis direction) may be longer than the length of the third branch electrode 5142 of the third electrode 514 in the first direction (X-axis direction) and the length of the fourth branch electrode 5152 of the fourth electrode 515 in the first direction (X-axis direction), respectively. In such an embodiment, the length of the first branch electrode 5122 of the first electrode 512 in the first direction (X-axis direction) and the length of the second branch electrode 5132 of the second electrode 513 in the first direction (X-axis direction) can be respectively longer than the length of the fifth branch electrode 5162 of the fifth electrode 516 in the first direction (X-axis direction) and the length of the sixth branch electrode 5172 of the sixth electrode 517 in the first direction (X-axis direction).

[0237] In such an embodiment, Fig.18As shown in , the first ultrasonic wave absorbing film 531 may be provided on the lower surface of the protective layer 519. The first ultrasonic wave absorbing film 531 may be provided to overlap with the first ultrasonic wave output unit UU1 and the second ultrasonic wave output unit UU2 in the thickness direction (Z-axis direction) of the vibration generator 510. The first ultrasonic wave absorbing film 531 may not overlap with the sound output unit SU in the thickness direction (Z-axis direction) of the vibration generator 510. Therefore, when ultrasonic waves generated by vibrating the display panel 300 using the first ultrasonic wave output unit UU1 and the second ultrasonic wave output unit UU2 of the vibration generator 510 travel toward the rear surface of the display panel 300, such ultrasonic waves may be absorbed by the first ultrasonic wave absorbing film 531.

[0238] In an embodiment in which the protective layer 519 is omitted in the second surface of the vibration generator 510, the second vibration layer 5112, the third vibration layer 5113, the third electrode 514, the fourth electrode 515, the fifth electrode 516 and the sixth electrode 517 can be protected by the first ultrasonic absorption film 531, and thus the protective layer 519 arranged to overlap with the first ultrasonic absorption film 531 in the thickness direction (Z-axis direction) of the display panel 300 can be omitted.

[0239] According to an embodiment, Fig.18 As shown in , the vibration generator 510 can vibrate the display panel 300 according to the first first driving voltage and the second first driving voltage in the sound mode, thereby outputting sound, and the vibration generator 510 can vibrate the display panel 300 according to the first second driving voltage and the second second driving voltage in the ultrasonic mode, thereby outputting ultrasonic waves. In such an embodiment, since the vibration generator 510 is divided into the sound output unit SU, the first ultrasonic output unit UU1 and the second ultrasonic output unit UU2, the sound output in the sound mode and the ultrasonic output in the ultrasonic mode can be effectively performed. In such an embodiment, since the vibration generator 510 includes two ultrasonic output units UU1 and UU2, high SPL ultrasonic waves can be output compared to the case when the vibration generator 510 includes one ultrasonic output unit. In addition, since the ultrasonic waves output to the rear surface of the display device 10 can be absorbed by the first ultrasonic absorbing film 531, the amount of ultrasonic waves entering the microphone 750 as noise toward the rear surface of the display device 10 can be reduced.

[0240] Fig.19 It is shown Figure 6 A cross-sectional view of another optional embodiment of a vibration generator.

[0241] Except that the first ultrasonic wave absorbing film 531 overlaps the sound output unit SU in the thickness direction (Z-axis direction) of the vibration generator 510, Fig.19 The embodiments shown in Fig.18 The embodiments shown in are basically the same. Fig.19 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.18 The same figure numbers are used for the embodiments of the present invention, and any repeated detailed description thereof will be omitted hereinafter.

[0242] Fig. 20 According to an optional embodiment, Figure 3 A cross-sectional view taken along line II'.

[0243] In addition to the display device 10 including the second ultrasonic wave absorbing film 532 and the third ultrasonic wave absorbing film 533, Fig. 20 The embodiments shown in Figure 6 The embodiments shown in are basically the same. Fig. 20 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Figure 6 For embodiments of the present invention, the same figure numbers are used as the figure numbers, and any repeated detailed description thereof will be omitted or simplified hereinafter.

[0244] Reference Fig. 20 In an embodiment, a second ultrasonic wave absorbing film 532 may be disposed on a first side surface of the vibration generator 510, and a third ultrasonic wave absorbing film 533 may be disposed on a second side surface of the vibration generator 510 to reduce ultrasonic waves output to the rear surface of the display device 10. The second ultrasonic wave absorbing film 532 may be attached to the first side surface of the vibration generator 510 using an adhesive member such as PSA. The third ultrasonic wave absorbing film 533 may be attached to the second side surface of the vibration generator 510 using an adhesive member such as PSA. The second ultrasonic wave absorbing film 532 and the third ultrasonic wave absorbing film 533 may be arranged to surround all side surfaces of the vibration generator 510.

[0245] In the embodiments, as mentioned above, Fig. 9 As described above, ultrasonic waves generated by vibrating the display panel 300 using the vibration generator 510 can be detected over the entire rear surface of the display panel 300. Therefore, when the second ultrasonic wave absorbing film 532 and the third ultrasonic wave absorbing film 533 are provided on the side surfaces of the vibration generator 510, ultrasonic waves output to the rear surface of the display device 10 can be further reduced.

[0246] In such an embodiment, when ultrasonic waves generated by vibrating the display panel 300 using the vibration generator 510 travel toward the rear surface of the display panel 300 , such ultrasonic waves may be absorbed by the first, second, and third ultrasonic absorbing films 531 , 532 , and 533 .

[0247] In such an embodiment, the second ultrasonic absorbing film 532 and the third ultrasonic absorbing film 533 may be the same as those described above. Figure 6 The first ultrasonic wave absorbing film 531 described is substantially the same, and any repeated detailed description of the second ultrasonic wave absorbing film 532 and the third ultrasonic wave absorbing film 533 will be omitted.

[0248] According to an embodiment, Fig. 20 As shown in FIG. 1 , the first ultrasonic wave absorbing film 531, the second ultrasonic wave absorbing film 532, and the third ultrasonic wave absorbing film 533 can absorb ultrasonic waves generated by vibrating the display panel 300 using the vibration generator 510. Therefore, when the vibration generator 510 and the microphone 750 are used as a proximity sensor for detecting an object approaching the front surface of the display device 10, the detection accuracy of the proximity sensor can be improved.

[0249] Fig.21 It is shown Fig. 20 A cross-sectional view of an embodiment of a vibration generator.

[0250] In addition to the second ultrasonic absorption film 532 being provided on the first side surface of the first ultrasonic output unit UU1 and the third ultrasonic absorption film 533 being provided on the second side surface of the first ultrasonic output unit UU1, Fig.21 The embodiments shown in Fig.14 The embodiments shown in are basically the same. Fig.21 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.14 For embodiments of the present invention, the same figure numbers are used as the figure numbers, and any repeated detailed description thereof will be omitted or simplified hereinafter.

[0251] Reference Fig.21 , the second ultrasonic absorption film 532 may be provided on the protective layer 519 provided on the first side surface of the first ultrasonic output unit UU1, and the third ultrasonic absorption film 533 may be provided on the protective layer 519 provided on the second side surface of the first ultrasonic output unit UU1. In such an embodiment, the second ultrasonic absorption film 532 and the third ultrasonic absorption film 533 may be provided on the protective layer 519 provided on the other side surfaces of the first ultrasonic output unit UU1. The second ultrasonic absorption film 532 and the third ultrasonic absorption film 533 may be provided to surround the side surface of the first ultrasonic output unit UU1.

[0252] The second ultrasonic absorbing film 532 may be disposed so as to overlap with the first ultrasonic output unit UU1 in the first direction (X-axis direction). The second ultrasonic absorbing film 532 may be disposed so as not to overlap with the sound output unit SU in the first direction (X-axis direction). The third ultrasonic absorbing film 533 may be disposed so as to overlap with the first ultrasonic output unit UU1 in the first direction (X-axis direction). The third ultrasonic absorbing film 533 may be disposed so as not to overlap with the sound output unit SU in the first direction (X-axis direction).

[0253] In an embodiment in which the protective layer 519 provided on the lower surface of the sound output unit SU and the first and second side surfaces of the first ultrasonic output unit UU1 is omitted, the first vibration layer 5111, the second vibration layer 5112, the first electrode 512, the second electrode 513, the third electrode 514, and the fourth electrode 515 may be protected by the first ultrasonic absorption film 531, the second ultrasonic absorption film 532, and the third ultrasonic absorption film 533. Therefore, in such an embodiment, the protective layer 519 overlapping the first ultrasonic absorption film 531 in the thickness direction (Z-axis direction) of the vibration generator 510 and the protective layer 519 overlapping the second ultrasonic absorption film 532 and the third ultrasonic absorption film 533 in the first direction (X-axis direction) may be omitted.

[0254] Fig. 22 It is shown Fig. 20 A cross-sectional view of an alternative embodiment of a vibration generator.

[0255] In addition to the second ultrasonic wave absorbing film 532 overlapping the sound output unit SU in the first direction (X-axis direction) and the third ultrasonic wave absorbing film 533 overlapping the sound output unit SU in the first direction (X-axis direction), Fig. 22 The embodiments shown in Fig.21 The embodiments shown in are basically the same. Fig. 22 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.21 The same figure numbers are used for the embodiments of the present invention, and any repeated detailed description thereof will be omitted hereinafter.

[0256] Fig.23 It is shown Fig. 20 A cross-sectional view of another optional embodiment of a vibration generator.

[0257] In addition to the second ultrasonic absorption film 532 being provided on the first side surface of the first ultrasonic output unit UU1 and the first side surface of the second ultrasonic output unit UU2, and the third ultrasonic absorption film 533 being provided on the second side surface of the first ultrasonic output unit UU1 and the second side surface of the second ultrasonic output unit UU2, Fig.23 The embodiments shown in Fig.15 The embodiments shown in are basically the same. Fig.23 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.15 The same figure numbers are used for the embodiments of the present invention, and any repeated detailed description thereof will be omitted hereinafter.

[0258] Reference Fig.23 In an embodiment, the second ultrasonic absorption film 532 may be provided on the protective layer 519 provided on the first side surface of the first ultrasonic output unit UU1 and the first side surface of the second ultrasonic output unit UU2, and the third ultrasonic absorption film 533 may be provided on the protective layer 519 provided on the second side surface of the first ultrasonic output unit UU1 and the second side surface of the second ultrasonic output unit UU2. In such an embodiment, the second ultrasonic absorption film 532 and the third ultrasonic absorption film 533 may be provided on the protective layer 519 provided on the other side surfaces of the first ultrasonic output unit UU1 and the other side surfaces of the second ultrasonic output unit UU2. The second ultrasonic absorption film 532 and the third ultrasonic absorption film 533 may be provided to surround the side surface of the first ultrasonic output unit UU1 and the side surface of the second ultrasonic output unit UU2.

[0259] The second ultrasonic absorbing film 532 may be disposed so as to overlap with the first ultrasonic output unit UU1 and the second ultrasonic output unit UU2 in the first direction (X-axis direction). The second ultrasonic absorbing film 532 may be disposed so as not to overlap with the sound output unit SU in the first direction (X-axis direction). The third ultrasonic absorbing film 533 may be disposed so as to overlap with the first ultrasonic output unit UU1 and the second ultrasonic output unit UU2 in the first direction (X-axis direction). The third ultrasonic absorbing film 533 may be disposed so as not to overlap with the sound output unit SU in the first direction (X-axis direction).

[0260] In an embodiment in which the protective layer 519 provided on the lower surface of the vibration generator 510, the first and second side surfaces of the first ultrasonic output unit UU1, and the first and second side surfaces of the second ultrasonic output unit UU2 is omitted, the second vibration layer 5112, the third vibration layer 5113, the third electrode 514, the fourth electrode 515, the fifth electrode 516, and the sixth electrode 517 may be protected by the first ultrasonic absorption film 531, the second ultrasonic absorption film 532, and the third ultrasonic absorption film 533. Therefore, in such an embodiment, the protective layer 519 overlapping the first ultrasonic absorption film 531 in the thickness direction (Z-axis direction) of the vibration generator 510 and the protective layer 519 overlapping the second and third ultrasonic absorption films 532, 533 in the first direction (X-axis direction) may be omitted.

[0261] Fig.24 It is shown Fig. 20 A cross-sectional view of another example of a vibration generator.

[0262] In addition to the second ultrasonic wave absorbing film 532 overlapping the sound output unit SU in the first direction (X-axis direction), and the third ultrasonic wave absorbing film 533 overlapping the sound output unit SU in the first direction (X-axis direction), Fig.24 The embodiments shown in Fig.23 The embodiments shown in are basically the same. Fig.24 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.23 The same figure numbers are used for the embodiments of the present invention, and any repeated detailed description thereof will be omitted hereinafter.

[0263] Fig.25 It is shown Fig. 20 A cross-sectional view of another example of a vibration generator.

[0264] In addition to the second ultrasonic absorption film 532 disposed on the first side surface of the sound output unit SU of the vibration generator 510, and the third ultrasonic absorption film 533 disposed on the first side surface of the first ultrasonic output unit UU1 of the vibration generator 510, Fig.25 The embodiments shown in Fig.16 The embodiments shown in are basically the same. Fig.25 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.16 For embodiments of the present invention, the same figure numbers are used as the figure numbers, and any repeated detailed description thereof will be omitted or simplified hereinafter.

[0265] Reference Fig.25 In an embodiment, the second ultrasonic absorbing film 532 may be provided on the protective layer 519 provided on the first side surface of the sound output unit SU, and the third ultrasonic absorbing film 533 may be provided on the protective layer 519 provided on the first side surface of the first ultrasonic output unit UU1. In such an embodiment, the second ultrasonic absorbing film 532 may be provided on the protective layer 519 provided on the other side surfaces of the sound output unit SU. The second ultrasonic absorbing film 532 may be provided to surround the side surface of the sound output unit SU. In such an embodiment, the third ultrasonic absorbing film 533 may be provided on the protective layer 519 provided on the other side surfaces of the first ultrasonic output unit UU1. The third ultrasonic absorbing film 533 may be provided to surround the side surface of the first ultrasonic output unit UU1.

[0266] The second ultrasonic absorbing film 532 may be disposed to overlap the sound output unit SU and the first ultrasonic output unit UU1 in the first direction (X-axis direction). The third ultrasonic absorbing film 533 may be disposed to overlap the sound output unit SU and the first ultrasonic output unit UU1 in the first direction (X-axis direction).

[0267] In an embodiment in which the protective layer 519 provided on the side surface of the sound output unit SU and the lower surface and the side surface of the first ultrasonic output unit UU1 is omitted, the first vibration layer 5111, the second vibration layer 5112, the first electrode 512, the second electrode 513, the third electrode 514, and the fourth electrode 515 may be protected by the first ultrasonic absorption film 531, the second ultrasonic absorption film 532, and the third ultrasonic absorption film 533. Therefore, in such an embodiment, the protective layer 519 overlapping the first ultrasonic absorption film 531 in the thickness direction (Z-axis direction) of the vibration generator 510 and the protective layer 519 overlapping the second ultrasonic absorption film 532 and the third ultrasonic absorption film 533 in the first direction (X-axis direction) may be omitted.

[0268] In an embodiment, Fig.25 As shown in , the first ultrasonic absorbing film 531 overlaps with the first ultrasonic output unit UU1 in the thickness direction (Z-axis direction) of the vibration generator 510, but does not overlap with the sound output unit SU, but the invention is not limited thereto. Alternatively, the first ultrasonic absorbing film 531 may be provided to overlap with the sound output unit SU and the first ultrasonic output unit UU1 in the thickness direction (Z-axis direction) of the vibration generator 510. In such an embodiment, the first ultrasonic absorbing film 531 may be provided on the protective layer 519 provided on the lower surface of the sound output unit SU.

[0269] Fig.26 It is shown Fig. 20 A cross-sectional view of another example of a vibration generator.

[0270] In addition to the second ultrasonic absorbing film 532 being disposed on the first side surface of the second ultrasonic output unit UU2 of the vibration generator 510, and the third ultrasonic absorbing film 533 being disposed on the first side surface of the first ultrasonic output unit UU1 of the vibration generator 510, Fig.26 The embodiments shown in Fig.18 The embodiments shown in are basically the same. Fig.26 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig.18 For embodiments of the present invention, the same figure numbers are used as the figure numbers, and any repeated detailed description thereof will be omitted or simplified hereinafter.

[0271] Reference Fig.26In an embodiment, the second ultrasonic absorption film 532 may be provided on the protective layer 519 provided on the first side surface of the second ultrasonic output unit UU2, and the third ultrasonic absorption film 533 may be provided on the protective layer 519 provided on the first side surface of the first ultrasonic output unit UU1. In such an embodiment, the second ultrasonic absorption film 532 may be provided on the protective layer 519 provided on the other side surfaces of the second ultrasonic output unit UU2. The second ultrasonic absorption film 532 may be provided to surround the side surface of the second ultrasonic output unit UU2. In such an embodiment, the third ultrasonic absorption film 533 may be provided on the protective layer 519 provided on the other side surfaces of the first ultrasonic output unit UU1. The third ultrasonic absorption film 533 may be provided to surround the side surface of the first ultrasonic output unit UU1.

[0272] The second ultrasonic wave absorbing film 532 may be disposed to overlap the first ultrasonic wave output unit UU1, the sound output unit SU, and the second ultrasonic wave output unit UU2 in the first direction (X-axis direction). The third ultrasonic wave absorbing film 533 may be disposed to overlap the first ultrasonic wave output unit UU1, the sound output unit SU, and the second ultrasonic wave output unit UU2 in the first direction (X-axis direction).

[0273] In an embodiment in which the protective layer 519 provided on the lower surface and the side surface of the first ultrasonic output unit UU1 and the lower surface and the side surface of the second ultrasonic output unit UU2 is omitted, the second vibration layer 5112, the third vibration layer 5113, the third electrode 514, the fourth electrode 515, the fifth electrode 516, and the sixth electrode 517 may be protected by the first ultrasonic absorption film 531, the second ultrasonic absorption film 532, and the third ultrasonic absorption film 533. Therefore, in such an embodiment, the protective layer 519 overlapping the first ultrasonic absorption film 531 in the thickness direction (Z-axis direction) of the vibration generator 510 and the protective layer 519 overlapping the second ultrasonic absorption film 532 and the third ultrasonic absorption film 533 in the first direction (X-axis direction) may be omitted.

[0274] In an embodiment, Fig.26 As shown in , the first ultrasonic absorbing film 531 overlaps with the first ultrasonic output unit UU1 and the second ultrasonic output unit UU2 in the thickness direction (Z-axis direction) of the vibration generator 510 but does not overlap with the sound output unit SU, but the invention is not limited thereto. Alternatively, the first ultrasonic absorbing film 531 may be provided to overlap with the sound output unit SU, the first ultrasonic output unit UU1 and the second ultrasonic output unit UU2 in the thickness direction (Z-axis direction) of the vibration generator 510. In such an embodiment, the first ultrasonic absorbing film 531 may be provided on the protective layer 519 provided on the lower surface of the sound output unit SU.

[0275] Fig. 27 According to another optional embodiment, Figure 3 A cross-sectional view taken along line II' of Fig.28 yes Fig. 27 An enlarged cross-sectional view of area A.

[0276] In addition to the display device 10 including the fourth ultrasonic wave absorbing film 534, Fig. 27 and Fig.28 The embodiments shown in Fig. 20 The embodiments shown in are basically the same. Fig. 27 and Fig.28 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Fig. 20 For embodiments of the present invention, the same figure numbers are used as the figure numbers, and any repeated detailed description thereof will be omitted or simplified hereinafter.

[0277] Reference Fig. 27 In an embodiment, a fourth ultrasonic wave absorbing film 534 may be provided on the bottom cover 400 adjacent to the side surface of the vibration generator 510 to reduce ultrasonic waves output to the rear surface of the display device 10. In such an embodiment, Fig.28 As shown in , when the vibration generator 510 is disposed on the heat dissipation film 430 of the bottom cover 400, the first heat dissipation layer 432 of the heat dissipation film 430 may be broken due to the vibration of the vibration generator 510, and thus the vibration generator 510 may be attached to the lower surface of the buffer film 420 in the region where the heat dissipation film 430 is removed. In such an embodiment, the fourth ultrasonic wave absorbing film 534 may be attached to the lower surface of the heat dissipation film 430. The fourth ultrasonic wave absorbing film 534 may be attached to the lower surface of the heat dissipation film 430 using an adhesive member such as PSA.

[0278] In an embodiment, the fourth ultrasonic wave absorbing film 534 may be disposed over the lower surface of the bottom cover 400 except for the region where the vibration generator 510 is disposed, but the invention is not limited thereto. Fig. 27 As shown in FIG. 5 , the fourth ultrasonic wave absorbing film 534 may be disposed in some areas of the bottom cover 400 adjacent to the side surface of the vibration generator 510 . The fourth ultrasonic wave absorbing film 534 may be disposed to surround the side surface of the vibration generator 510 .

[0279] In the embodiments, as mentioned above, Fig. 9 As described above, ultrasonic waves generated by vibrating the display panel 300 using the vibration generator 510 can be detected throughout the entire rear surface of the display panel 300. Therefore, when the fourth ultrasonic wave absorbing film 534 is disposed on the bottom cover 400, ultrasonic waves output to the rear surface of the display device 10 can be further reduced.

[0280] In such an embodiment, the fourth ultrasonic absorbing film 534 may be the same as that in the above reference Figure 6 The first ultrasonic wave absorbing film 531 described is substantially the same, and any repeated detailed description of the fourth ultrasonic wave absorbing film 534 will be omitted.

[0281] According to an embodiment, Fig. 27 As shown in FIG. 1 , the first ultrasonic wave absorbing film 531, the second ultrasonic wave absorbing film 532, the third ultrasonic wave absorbing film 533, and the fourth ultrasonic wave absorbing film 534 can absorb ultrasonic waves generated by vibrating the display panel 300 using the vibration generator 510. Therefore, in such an embodiment, when the vibration generator 510 and the microphone 750 are used as a proximity sensor for detecting an object approaching the front surface of the display device 10, the detection accuracy of the proximity sensor can be improved.

[0282] Fig.29 According to another optional embodiment, Figure 3 A cross-sectional view taken along line II' of Fig.30 According to another optional embodiment, Figure 3 A cross-sectional view taken along line II'.

[0283] In addition to the display device 10 including the first ultrasonic wave absorbing film 531 disposed on the middle frame 600, Fig.29 The embodiments shown in Figure 6 The embodiments shown in are basically the same. Fig.29 The same or identical components shown in FIG. 1 have been labeled with the same or identical components as described above. Figure 6 For embodiments of the present invention, the same figure numbers are used as the figure numbers, and any repeated detailed description thereof will be omitted or simplified hereinafter.

[0284] Reference Fig.29 In an embodiment, a first ultrasonic wave absorbing film 531 may be provided on a first surface of the middle frame 600 facing the second surface of the display panel 300 to reduce ultrasonic waves output to the rear surface of the display device 10. The first ultrasonic wave absorbing film 531 may be attached to the first surface of the middle frame 600 using an adhesive member such as PSA. The first ultrasonic wave absorbing film 531 may be provided to overlap the vibration generator 510 in the thickness direction (Z-axis direction) of the display panel 300. When ultrasonic waves generated by vibrating the display panel 300 using the vibration generator 510 travel toward the rear side surface of the display panel 300, such ultrasonic waves may be absorbed by the first ultrasonic wave absorbing film 531.

[0285] In an embodiment, Fig.29As shown in FIG. 1 , the first ultrasonic absorbing film 531 is provided on the first surface of the middle frame 600 in the region overlapping the vibration generator 510 in the thickness direction (Z-axis direction) of the display panel 300, but the invention is not limited thereto. Fig. 9 As described above, the ultrasonic wave generated by vibrating the display panel 300 using the vibration generator 510 can be detected over the entire rear surface of the display panel 300, so in an optional embodiment, the first ultrasonic wave absorbing film 531 can be as shown in FIG. Fig.30 , is provided on the entire first surface of the middle frame 600 to reduce ultrasonic waves output to the rear surface of the display device 10 .

[0286] In such an embodiment, the first ultrasonic absorbing film 531 is similar to the above-mentioned Figure 6 The described first ultrasonic wave absorbing films 531 are substantially the same, and any repeated detailed description of the first ultrasonic wave absorbing films 531 will be omitted.

[0287] according to Fig.29 In the embodiment shown in FIG. 1 , the first ultrasonic wave absorbing film 531 can absorb ultrasonic waves generated by vibrating the display panel 300 using the vibration generator 510. Therefore, when the vibration generator 510 and the microphone 750 are used as a proximity sensor for detecting an object approaching the front surface of the display device 10, the detection accuracy of the proximity sensor can be improved.

[0288] According to an embodiment of the display device, a vibration generator for vibrating the display panel to output sound or ultrasonic waves is provided on the surface of the display panel. Therefore, by means of a vibration generator that is not exposed to the outside, the display panel is used as a vibration surface to output sound or ultrasonic waves. Therefore, since a call receiver for outputting the other party's voice from the front surface of the display device and a proximity sensor for determining whether the user is positioned close to the front surface of the display device can be omitted, the light transmission area of ​​the cover window can be expanded, and thus the area where the image is displayed by the display panel can be expanded.

[0289] According to an embodiment of the display device, ultrasonic waves generated by vibrating the display panel using a vibration generator can be absorbed by the ultrasonic wave absorbing film. Therefore, when the vibration generator and the microphone are used as a proximity sensor for detecting an object close to the front surface of the display device, the amount of ultrasonic waves entering the microphone toward the rear surface of the display device as noise can be reduced, thereby improving the detection accuracy of the proximity sensor.

[0290] According to the embodiment of the display device, since the vibration generator is divided into the sound output unit and the first ultrasonic wave output unit, the sound output in the sound mode and the ultrasonic wave output in the ultrasonic mode may be effectively performed.

[0291] According to the embodiment of the display device, since the vibration generator includes two ultrasonic wave output units, ultrasonic waves of high SPL may be output compared to a case in which the vibration generator includes a single ultrasonic wave output unit.

[0292] The invention should not be construed as being limited to the 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.

[0293] While the invention has been particularly shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the claims.

Claims

1. A display device, the display device include: The display panel comprises a first substrate and a pixel array layer disposed on a first surface of the first substrate; a vibration generator, disposed on the second surface of the first substrate, the second surface of the first substrate facing away from the first surface of the first substrate, wherein the vibration generator outputs ultrasonic waves; and a first ultrasonic wave absorbing film, overlapping the vibration generator in the thickness direction of the display panel, wherein the first ultrasonic wave absorbing film absorbs the ultrasonic wave, wherein the first surface of the vibration generator faces the second surface of the first substrate, and the first ultrasonic wave absorbing film directly contacts the second surface of the vibration generator, and the second surface of the vibration generator faces away from the first surface of the vibration generator, and The vibration generator includes a first electrode, a second electrode and a vibration layer, a first driving voltage is applied to the first electrode, a second driving voltage is applied to the second electrode, the vibration layer is arranged between the first electrode and the second electrode, and the vibration layer contracts and expands based on the first driving voltage and the second driving voltage.

2. The display device according to claim 1, wherein the display device further comprises: include: A second ultrasonic wave absorbing film is disposed on the first side surface of the vibration generator, wherein the second ultrasonic wave absorbing film absorbs the ultrasonic wave.

3. The display device according to claim 2, further comprising: include: A third ultrasonic wave absorbing film is disposed on the second side surface of the vibration generator, wherein the third ultrasonic wave absorbing film absorbs the ultrasonic wave.

4. The display device according to claim 3, in, The second ultrasonic wave absorbing film and the third ultrasonic wave absorbing film surround a side surface of the vibration generator.

5. The display device according to claim 1, further comprising: include: A bottom cover, disposed on the second surface of the first substrate; as well as The fourth ultrasonic wave absorbing film is disposed on the bottom cover and absorbs the ultrasonic wave.

6. The display device according to claim 5, in, The bottom cover comprises: A light-blocking film is disposed on the second surface of the first substrate; a buffer film, disposed on the light-blocking film; and a heat dissipation film, disposed on the buffer film, Wherein, the fourth ultrasonic absorbing film is arranged on the heat dissipating film.

7. The display device according to claim 6, in, The vibration generator does not overlap the heat dissipation film in the thickness direction of the display panel, and The vibration generator is disposed on the buffer film.

8. The display device according to claim 1, further comprising: include: a frame disposed on the second surface of the first substrate, Wherein, the first ultrasonic wave absorbing film is disposed on a first surface of the frame facing the second surface of the first substrate.

9. A display device, the display device include: The display panel comprises a first substrate and a pixel array layer disposed on a first surface of the first substrate; a vibration generator, disposed on the second surface of the first substrate, and comprising a sound output unit and a first ultrasonic wave output unit, the second surface of the first substrate being opposite to the first surface of the first substrate, the sound output unit vibrating the display panel to output sound, and the first ultrasonic wave output unit vibrating the display panel to output ultrasonic waves; as well as a first ultrasonic wave absorbing film, overlapping the first ultrasonic wave output unit in the thickness direction of the display panel, wherein the first ultrasonic wave absorbing film absorbs the ultrasonic wave, wherein the first surface of the vibration generator faces the second surface of the first substrate, and the first ultrasonic wave absorbing film directly contacts the second surface of the vibration generator, and the second surface of the vibration generator faces away from the first surface of the vibration generator, wherein the sound output unit includes a first electrode, a second electrode, and a first vibration layer, a first driving voltage is applied to the first electrode, a second driving voltage is applied to the second electrode, the first vibration layer is arranged between the first electrode and the second electrode, wherein the first vibration layer contracts and expands based on the first driving voltage and the second driving voltage, and The first ultrasonic output unit includes a third electrode, a fourth electrode, and a second vibration layer, a third driving voltage is applied to the third electrode, a fourth driving voltage is applied to the fourth electrode, and the second vibration layer is arranged between the third electrode and the fourth electrode, wherein the second vibration layer contracts and expands based on the third driving voltage and the fourth driving voltage.

10. A display device, the display device include: The display panel comprises a first substrate and a pixel array layer disposed on a first surface of the first substrate; a vibration generator, disposed on the second surface of the first substrate, and comprising a sound output unit and a first ultrasonic wave output unit, the second surface of the first substrate being opposite to the first surface of the first substrate, the sound output unit vibrating the display panel to output sound, and the first ultrasonic wave output unit vibrating the display panel to output ultrasonic waves; as well as a first ultrasonic wave absorbing film, overlapping the first ultrasonic wave output unit in the thickness direction of the display panel, wherein the first ultrasonic wave absorbing film absorbs the ultrasonic wave, wherein the first surface of the vibration generator faces the second surface of the first substrate, and the first ultrasonic wave absorbing film directly contacts the second surface of the vibration generator, and the second surface of the vibration generator faces away from the first surface of the vibration generator, Wherein, the first ultrasonic output unit is arranged on the second surface of the first substrate, The sound output unit is provided on the first ultrasonic wave output unit, and The first ultrasonic wave absorbing film is provided on the sound output unit.

11. The display device according to claim 10, wherein the display device further comprises: include: A second ultrasonic wave absorbing film is provided on a first side surface of the first ultrasonic wave output unit, wherein the second ultrasonic wave absorbing film absorbs the ultrasonic wave.

12. The display device according to claim 11, further comprising: include: A third ultrasonic wave absorbing film is provided on the second side surface of the first ultrasonic wave output unit, wherein the third ultrasonic wave absorbing film absorbs the ultrasonic wave.

13. The display device according to claim 12, in, The second ultrasonic wave absorbing film and the third ultrasonic wave absorbing film surround a side surface of the first ultrasonic wave output unit.

14. The display device according to claim 12, in, The second ultrasonic wave absorbing film or the third ultrasonic wave absorbing film is provided on a side surface of the sound output unit.

15. A display device, the display device include: The display panel comprises a first substrate and a pixel array layer disposed on a first surface of the first substrate; a vibration generator, disposed on the second surface of the first substrate, and comprising a sound output unit and a first ultrasonic wave output unit, the second surface of the first substrate being opposite to the first surface of the first substrate, the sound output unit vibrating the display panel to output sound, and the first ultrasonic wave output unit vibrating the display panel to output ultrasonic waves; as well as a first ultrasonic wave absorbing film, overlapping the first ultrasonic wave output unit in the thickness direction of the display panel, wherein the first ultrasonic wave absorbing film absorbs the ultrasonic wave, wherein the first surface of the vibration generator faces the second surface of the first substrate, and the first ultrasonic wave absorbing film directly contacts the second surface of the vibration generator, and the second surface of the vibration generator faces away from the first surface of the vibration generator, wherein the first ultrasonic wave output unit and the sound output unit are disposed on the second surface of the first substrate, and The first ultrasonic wave absorbing film is provided on the first ultrasonic wave output unit.

16. The display device according to claim 15, in, The first ultrasonic wave absorbing film is provided on the sound output unit.

17. The display device according to claim 15, in, A first side surface of the first ultrasonic wave output unit and a first side surface of the acoustic output unit are in direct contact with each other.

18. The display device according to claim 15, wherein the display device further comprises: include: a second ultrasonic wave absorbing film disposed on a second side surface of the first ultrasonic wave output unit, wherein the second ultrasonic wave absorbing film absorbs the ultrasonic wave; and A third ultrasonic wave absorbing film is provided on the second side surface of the sound output unit, wherein the third ultrasonic wave absorbing film absorbs the ultrasonic wave.

19. The display device according to claim 18, in, The second ultrasonic wave absorbing film surrounds a side surface of the first ultrasonic wave output unit, and The third ultrasonic wave absorbing film surrounds a side surface of the sound output unit.

20. A display device, the display device include: The display panel comprises a first substrate and a pixel array layer disposed on a first surface of the first substrate; a vibration generator, disposed on the second surface of the first substrate, and comprising a sound output unit and a first ultrasonic wave output unit, the second surface of the first substrate being opposite to the first surface of the first substrate, the sound output unit vibrating the display panel to output sound, and the first ultrasonic wave output unit vibrating the display panel to output ultrasonic waves; as well as a first ultrasonic wave absorbing film, overlapping the first ultrasonic wave output unit in the thickness direction of the display panel, wherein the first ultrasonic wave absorbing film absorbs the ultrasonic wave, wherein the first surface of the vibration generator faces the second surface of the first substrate, and the first ultrasonic wave absorbing film directly contacts the second surface of the vibration generator, and the second surface of the vibration generator faces away from the first surface of the vibration generator, The vibration generator further includes a second ultrasonic wave output unit, and the second ultrasonic wave output unit causes the display panel to vibrate to output the ultrasonic wave.

21. The display device according to claim 20, in, The second ultrasonic output unit includes a fifth electrode, a sixth electrode, and a third vibration layer, a fifth driving voltage is applied to the fifth electrode, a sixth driving voltage is applied to the sixth electrode, and the third vibration layer is arranged between the fifth electrode and the sixth electrode, wherein the third vibration layer contracts and expands based on the fifth driving voltage and the sixth driving voltage.

22. The display device according to claim 20, in, The first ultrasonic output unit is disposed on the second surface of the first substrate, The sound output unit is arranged on the first ultrasonic output unit, The second ultrasonic wave output unit is provided on the sound output unit, and The first ultrasonic wave absorbing film is provided on the second ultrasonic wave output unit.

23. The display device according to claim 22, wherein the display device further comprises: include: A second ultrasonic wave absorbing film is provided on the first side surface of the second ultrasonic wave output unit, wherein the second ultrasonic wave absorbing film absorbs the ultrasonic wave.

24. The display device according to claim 23, wherein the display device further comprises: include: A third ultrasonic wave absorbing film is provided on the second side surface of the second ultrasonic wave output unit, wherein the third ultrasonic wave absorbing film absorbs the ultrasonic wave.

25. The display device according to claim 24, in, The second ultrasonic wave absorbing film and the third ultrasonic wave absorbing film surround a side surface of the second ultrasonic wave output unit.

26. The display device according to claim 24, in, The second ultrasonic wave absorbing film is provided on a first side surface of the first ultrasonic wave output unit and a first side surface of the sound output unit.

27. The display device according to claim 20, in, The first ultrasonic wave output unit, the sound output unit, and the second ultrasonic wave output unit are disposed on the second surface of the first substrate, and The first ultrasonic wave absorbing film is provided on the first ultrasonic wave output unit and the second ultrasonic wave output unit.

28. The display device according to claim 27, in, The first ultrasonic wave absorbing film is provided on the sound output unit.

29. The display device according to claim 27, in, The sound output unit is provided between the first ultrasonic wave output unit and the second ultrasonic wave output unit.

30. The display device according to claim 27, in, The first side surface of the first ultrasonic wave output unit and the first side surface of the sound output unit are in direct contact with each other, and The first side surface of the second ultrasonic wave output unit and the second side surface of the sound output unit are in direct contact with each other.

31. The display device according to claim 30, wherein the display device further comprises: include: a second ultrasonic wave absorbing film disposed on a second side surface of the first ultrasonic wave output unit, wherein the second ultrasonic wave absorbing film absorbs the ultrasonic wave; and A third ultrasonic wave absorbing film is provided on the second side surface of the second ultrasonic wave output unit, wherein the third ultrasonic wave absorbing film absorbs the ultrasonic wave.

32. The display device according to claim 31, in, The second ultrasonic wave absorbing film surrounds a side surface of the first ultrasonic wave output unit, and The third ultrasonic wave absorbing film surrounds a side surface of the second ultrasonic wave output unit.

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