Display device

Abstract

A display device is provided, including a display panel displaying an image, and a sound generator disposed on a surface of the display panel to vibrate the display panel, wherein a distance between each of a plurality of side surfaces of the sound generator and a corresponding side surface of a plurality of side surfaces of the display panel respectively corresponding to the plurality of side surfaces of the sound generator is substantially equal.

Description

[0001] This application claims priority and benefit to Korean Patent Application No. 10-2020-0023415, filed on February 26, 2020, which is incorporated herein by reference for all purposes, as fully set forth herein. Technical Field

[0002] Exemplary embodiments of the invention generally relate to a display device, and more specifically, to a display device having a sound generator disposed on the lower surface of a display panel of the display device. Background Technology

[0003] The display device is installed on electronic products or household appliances such as televisions, monitors, laptops, smartphones, tablets, electrode pads, wearable devices, smartwatches, portable information devices, navigation devices, or vehicle control display devices and is used as a screen for displaying images.

[0004] The display device may include a display panel for displaying images and a sound generator for outputting sound related to the images. The information disclosed above in this background section is only for understanding the background art of the inventive concept, and therefore may contain information that does not constitute prior art. Summary of the Invention

[0005] The applicant discovered that in typical display devices, sound quality is degraded due to interference between sounds reflected from walls or the floor, as the sound output from the sound generator travels backward or downward from the display device. This interference makes accurate sound transmission difficult and disrupts the viewer's experience.

[0006] A display device constructed according to the principles of the invention and exemplary embodiments, for example, improves the bass reproduction band, enhances the sound pressure level, and improves the flatness of the sound pressure in the display device by including a sound generator disposed on the lower surface of the display panel to generate sound by vibrating the display panel.

[0007] In some exemplary embodiments, the sound generator may be positioned substantially equidistant from one side of the display panel to increase the sound pressure level of the sound output from the display panel and optimize the constructive and destructive interference of the vibrations of the display panel, thereby minimizing sound distortion to improve the bass reproduction band and enhance the sound pressure level. Additional features of the inventive concept will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practice of the inventive concept.

[0008] According to one aspect of the invention, a display device includes: a display panel for displaying an image; and a sound generator disposed on a surface of the display panel to cause the display panel to vibrate, wherein each of a plurality of side surfaces of the sound generator is substantially equidistant from a corresponding side surface of a plurality of side surfaces of the display panel corresponding to the plurality of side surfaces of the sound generator.

[0009] The display panel may include first to fourth side surfaces that are substantially perpendicular or substantially parallel to each other, and the sound generator may include first to fourth side surfaces that correspond to the first to fourth side surfaces of the display panel respectively, and the distance between each side surface of the first to fourth side surfaces of the sound generator and the corresponding side surface of the first to fourth side surfaces of the display panel may be substantially equal.

[0010] The ratio of the length of the first side surface of the display panel to the length of the third side surface of the display panel, which is approximately perpendicular to the first side surface of the display panel, can be substantially equal to the ratio of the length of the first side surface of the sound generator corresponding to the first side surface of the display panel to the length of the third side surface of the sound generator corresponding to the third side surface of the display panel.

[0011] The sound generator may include a plurality of sound generators, each of which includes one or more side surfaces corresponding to a plurality of side surfaces of the display panel, and the distance between each of the plurality of side surfaces of the display panel and at least some of the side surfaces of the sound generator corresponding to the plurality of side surfaces of the display panel may be substantially equal, wherein the plurality of side surfaces of the display panel includes a first side surface to a fourth side surface.

[0012] The sound generator may include a first sound generator and a second sound generator spaced apart from each other in a direction substantially perpendicular to the first and second side surfaces of the display panel, and the first distance between the first side surface of the first sound generator and the first side surface of the display panel, the second distance between the second side surface of the second sound generator and the second side surface of the display panel, the third distance between the third side surface of the first sound generator or the third side surface of the second sound generator and the third side surface of the display panel, and the fourth distance between the fourth side surface of the first sound generator or the fourth side surface of the second sound generator and the fourth side surface of the display panel may all be substantially equal.

[0013] Each of the first to fourth distances can be less than the distance between the first sound generator and the second sound generator.

[0014] The sound generator may include a first sound generator and a second sound generator spaced apart from each other in a direction generally parallel to the first and second side surfaces of the display panel, and the first distance between the first side surface of the first sound generator or the first side surface of the second sound generator and the first side surface of the display panel, the second distance between the second side surface of the first sound generator or the second side surface of the second sound generator and the second side surface of the display panel, the third distance between the third side surface of the first sound generator and the third side surface of the display panel, and the fourth distance between the fourth side surface of the second sound generator and the fourth side surface of the display panel may all be substantially equal.

[0015] Each of the first to fourth distances can be less than the distance between the first sound generator and the second sound generator.

[0016] The sound generator may include a first sound generator to a fourth sound generator that are respectively adjacent to a first corner to a fourth corner of the display panel, and the first distance between the first side surface of the first sound generator or the first side surface of the second sound generator and the first side surface of the display panel, the second distance between the second side surface of the third sound generator or the second side surface of the fourth sound generator and the second side surface of the display panel, the third distance between the third side surface of the first sound generator or the third side surface of the third sound generator and the third side surface of the display panel, and the fourth distance between the fourth side surface of the second sound generator or the fourth side surface of the fourth sound generator and the fourth side surface of the display panel may all be substantially equal.

[0017] The sound generator may include: a first sound generator having a plurality of side surfaces; and a second sound generator surrounding the first sound generator and having a plurality of side surfaces respectively corresponding to the plurality of side surfaces of the display panel.

[0018] The multiple side surfaces of the second sound generator may include a first side surface to a fourth side surface, the multiple side surfaces of the display panel include a first side surface to a fourth side surface, and the distance between each of the first to fourth side surfaces of the second sound generator and the corresponding side surface of the first to fourth side surfaces of the display panel may be substantially equal.

[0019] The first sound generator may have a first width in the plan view, and the second sound generator may have a second width in the plan view that is substantially equal to the first width.

[0020] According to another aspect of the invention, a display device includes: a display panel having a first side surface to a fourth side surface; and a sound generator disposed on the surface of the display panel to cause the display panel to vibrate, and having a first side surface to a fourth side surface respectively corresponding to the first side surface to the fourth side surface of the display panel, wherein the distance between each side surface of the first side surface to the third side surface of the sound generator and the corresponding side surface of the first side surface to the third side surface of the display panel is substantially equal.

[0021] The sound generator may have a longitudinal axis that is substantially parallel to the fourth or third side surface of the display panel, and the distance between each of the first, third, and fourth side surfaces of the sound generator and the corresponding side surface of the first, third, and fourth side surfaces of the display panel is less than the distance between the second side surface of the sound generator and the second side surface of the display panel.

[0022] The ratio of the length of the first side surface of the display panel to the length of the third side surface of the display panel, which is approximately perpendicular to the first side surface of the display panel, can be substantially equal to the ratio of the length of the first side surface of the sound generator corresponding to the first side surface of the display panel to the length of the third side surface of the sound generator corresponding to the third side surface of the display panel.

[0023] The sound generator may have a longitudinal axis that is substantially parallel to the first or second side surface of the display panel, and the distance between each of the first, third, and fourth side surfaces of the sound generator and the corresponding side surface of the first, third, and fourth side surfaces of the display panel is less than the distance between the second side surface of the sound generator and the second side surface of the display panel.

[0024] According to another aspect of the invention, a display device includes: a substrate having a first generally curved surface; and a sound generator disposed on the surface of the substrate to cause the substrate to vibrate, the sound generator having a second generally curved surface, wherein each of a plurality of portions of the second generally curved surface is substantially equidistant from a corresponding portion of a plurality of portions of the first generally curved surface that correspond to a plurality of portions of the second generally curved surface.

[0025] The substrate may include a generally arcuate portion having at least one generally arcuate portion and a protrusion extending from one side of the generally arcuate portion, and the display device may also include a generally circular display portion disposed on the generally arcuate portion, wherein the sound generator may have a generally circular shape corresponding to the generally circular display portion and have substantially the same center point as the generally circular display portion.

[0026] The sound generator may include: a first sound generator including a generally circular side surface having a first radius; and a second sound generator at least partially surrounding the first sound generator at a distance from the first sound generator, the second sound generator including a generally circular side surface having a second radius greater than the first radius.

[0027] The first sound generator may have a first width in the plan view, and the second sound generator may have a second width in the plan view that is substantially equal to the first width.

[0028] It will be understood that the foregoing general description and the following detailed description are exemplary and explanatory, and are intended to provide further explanation of the invention as claimed. Attached Figure Description

[0029] The accompanying drawings are included to provide a further understanding of the invention. The drawings are incorporated in and form part of this specification. The drawings illustrate exemplary embodiments of the invention and, together with the description, serve to explain the inventive concept.

[0030] Figure 1 This is a perspective view of an exemplary embodiment of a display device constructed according to the principles of the invention.

[0031] Figure 2 yes Figure 1 An exploded perspective view of the display device.

[0032] Figure 3 yes Figure 2 A bottom view of the display device.

[0033] Figure 4 It is along Figure 3 A sectional view taken from line I-I'.

[0034] Figure 5 yes Figure 4 A cross-sectional view of the pixel array layer.

[0035] Figure 6 yes Figure 3 A cross-sectional view of a sound generator.

[0036] Figure 7 The diagram shows the setting for making the setting Figure 6 An exemplary process for vibrating the vibration layer between the first branch electrode and the second branch electrode of a sound generator.

[0037] Figure 8 yes Figure 2 A bottom view of another exemplary embodiment of the display device.

[0038] Figure 9 yes Figure 2A bottom view of another exemplary embodiment of the display device.

[0039] Figure 10 yes Figure 2 A bottom view of another exemplary embodiment of the display device.

[0040] Figure 11 yes Figure 2 A bottom view of another exemplary embodiment of the display device.

[0041] Figure 12 yes Figure 2 A bottom view of another exemplary embodiment of the display device.

[0042] Figure 13 It is shown Figures 10 to 12 A graph depicting the sound pressure level versus frequency of an exemplary display device.

[0043] Figure 14 yes Figure 2 A bottom view of another exemplary embodiment of the display device.

[0044] Figure 15 It shows when Figure 14 A graph depicting the sound pressure level versus frequency as the size of the sound generator of an exemplary display device changes.

[0045] Figure 16 It shows when Figure 14 A graph depicting the total harmonic distortion (THD) versus frequency as the size of the sound generator of an exemplary display device changes.

[0046] Figure 17 This is an exploded perspective view of an exemplary embodiment of a display device constructed according to the principles of the invention.

[0047] Figure 18 Is when Figure 17 A bottom view of the display device when the flexible film is unfolded.

[0048] Figure 19 yes Figure 17 A bottom view of the display device.

[0049] Figure 20 It is along Figure 19 The sectional view taken from line II-II'.

[0050] Figure 21 yes Figure 17 A bottom view of another exemplary embodiment of the display device.

[0051] Figure 22 yes Figure 17 A bottom view of another exemplary embodiment of the display device.

[0052] Figure 23 yes Figure 17 A bottom view of another exemplary embodiment of the display device.

[0053] Figure 24 This is a plan view of yet another exemplary embodiment of a display device constructed according to the principles of the invention.

[0054] Figure 25 yes Figure 24 A bottom view of another exemplary embodiment of the display device.

[0055] Figure 26 yes Figure 24 A bottom view of another exemplary embodiment of the display device. Detailed Implementation

[0056] In the following description, numerous specific details are set forth for illustrative purposes in order to provide a thorough understanding of various exemplary embodiments or implementations of the invention. As used herein, “embodiment” and “implementation” are interchangeable terms and are non-limiting examples of apparatus or methods employing one or more of the inventive concepts disclosed herein. However, it will be apparent that various exemplary embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and apparatuses are shown in block diagram form to avoid unnecessarily obscuring the various exemplary embodiments. Furthermore, the various exemplary embodiments may be different, but are not necessarily exclusive. For example, a particular shape, construction, and characteristic of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0057] Unless otherwise stated, the exemplary embodiments shown are to be understood as providing exemplary features detailing variations in some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise stated, features, components, modules, layers, films, panels, regions and / or aspects, etc. (hereinafter individually or collectively referred to as “elements”) of various embodiments may be combined, separated, interchanged and / or rearranged without departing from the inventive concept.

[0058] The use of crosshairs and / or shading in the accompanying drawings is generally provided to clarify the boundaries between adjacent elements. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, size, scale, commonalities between the elements shown, or any other characteristics, properties, etc. Furthermore, in the drawings, the dimensions and relative dimensions of elements may be exaggerated for clarity and / or descriptive purposes. A particular process sequence may be performed differently than the described sequence when exemplary embodiments can be implemented differently. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of the described sequence. Additionally, the same reference numerals denote the same elements.

[0059] When a component or layer is referred to as being "on," "connected to," or "bonded to" another component or layer, the component or layer may be directly on, directly connected to, or directly bonded to the other component or layer, or there may be intermediate components or layers present. However, when a component or layer is referred to as being "directly on," "directly connected to," or "directly bonded to" another component or layer, there are no intermediate components or layers present. Therefore, the term "connection" can refer to a physical connection, electrical connection, and / or fluid connection, with or without intermediate components. Furthermore, the D1, D2, and D3 axes are not limited to the three axes of a Cartesian coordinate system (such as the X, Y, and Z axes) and can be interpreted in a broader sense. For example, the D1, D2, and D3 axes can be perpendicular to each other, or they can represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “at least one of X, Y, and Z (species / man)” and “at least one selected from the group consisting of X, Y, and Z (species / man)” can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as XYZ, XYY, YZ, and ZZ. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0060] Although the terms “first,” “second,” etc., can be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, without departing from the publicly stated teachings, the first element discussed below can be referred to as the second element.

[0061] Spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., as in “sidewall”) may be used herein for descriptive purposes and thereby describe the relationship of one element to another (or other) elements as shown in the accompanying drawings. Spatial relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture, in addition to those depicted in the drawings. For example, if the device in the drawings is flipped, an element described as “below” or “under” other elements or features would subsequently be positioned “above” other elements or features. Thus, the exemplary term “below” can encompass both above and below orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), and thus, the spatial relative descriptive terms used herein are interpreted accordingly.

[0062] Generally, as used herein, "above," "top," and "upper surface" can refer to the upward direction from the display device (i.e., the Z-axis direction), and "below," "bottom," and "lower surface" can refer to the downward direction from the display device (i.e., the direction opposite to the Z-axis direction). Furthermore, "left," "right," "up," and "down" can refer to the direction when the display device is viewed in a plane. For example, "left" can refer to the direction opposite to the X-axis direction, "right" can refer to the X-axis direction, "up" can refer to the Y-axis direction, and "down" can refer to the direction opposite to the Y-axis direction.

[0063] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and variations thereof, “including” and / or variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, elements, components, and / or groups thereof, but does not preclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than terms of degree, and are thus used to interpret the inherent deviations in measured, calculated, and / or provided values ​​that will be recognized by those skilled in the art. Expressions such as “generally rectangular,” “generally curved surface,” and / or “generally arcuate,” and similar expressions are intended to define the shape of the element. That is, the above expressions indicate that the element has a rectangular shape, a curved surface, or an arcuate shape. However, in actual production processes, due to limitations in instruments, experimental conditions, and the environment, it is impossible to obtain absolutely accurate rectangular shapes, curved surfaces, or arc shapes. Therefore, the above description indicates that the shape of the component is controlled to be rectangular, curved, or arc-shaped within a tolerance range permissible in the art. Those skilled in the art, after reading the technical solutions in the claims, know how to determine the permissible deviations to obtain the corresponding shape.

[0064] Various exemplary embodiments are described herein with reference to cross-sectional and / or exploded views as schematic illustrations of idealized exemplary embodiments and / or intermediate structures. Thus, variations in the shapes of the illustrations due to, for example, manufacturing techniques and / or tolerances will be expected. Therefore, the exemplary embodiments disclosed herein should not necessarily be interpreted as limited to the shapes specifically shown for the regions, but rather include deviations in shape due to, for example, manufacturing processes. In this way, the regions shown in the figures can be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the regions of the device, and are thus not intended to be limiting.

[0065] As is customary in the art, exemplary embodiments are described and illustrated in the accompanying drawings according to functional blocks, units, and / or modules. Those skilled in the art will understand that these blocks, units, and / or modules are physically implemented by electronic (or optical) circuitry, such as logic circuits, discrete components, microprocessors, hardwired circuits, memory elements, wiring connections, etc., which may be formed using semiconductor-based manufacturing techniques or other manufacturing techniques. Where blocks, units, and / or modules are implemented by microprocessors or other similar hardware, they can be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and may optionally be driven by firmware and / or software. It is also contemplated that each block, unit, and / or module may be implemented by dedicated hardware, or as a combination of dedicated hardware performing some functions and processors performing other functions (e.g., one or more programmed microprocessors and associated circuitry). Furthermore, without departing from the scope of the inventive concept, each block, unit, and / or module of some exemplary embodiments may be physically separated into two or more interactive and discrete blocks, units, and / or modules. Furthermore, without departing from the scope of the inventive concept, some exemplary embodiments of blocks, units and / or modules may be physically combined into more complex blocks, units and / or modules.

[0066] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure is a part. Terms (such as those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and shall not be interpreted in an idealized or overly formalized sense unless expressly defined herein.

[0067] Figure 1 This is a perspective view of an exemplary embodiment of a display device constructed according to the principles of the invention. Figure 2 yes Figure 1 An exploded perspective view of the display device.

[0068] In the following text, some reference numerals that appeared in the previously described figures have been omitted to avoid redundancy. (Refer to...) Figure 1 and Figure 2 The display device 10 is a device for displaying moving or still images. The display device 10 can be used as a display screen in portable electronic devices such as mobile phones, smartphones, tablet PCs, smartwatches, watch phones, mobile communication terminals, e-notebooks, e-book readers, portable multimedia players (PMPs), navigation devices, and ultra-mobile PCs (UMPCs), as well as in various products such as televisions, laptops, monitors, billboards, and the Internet of Things (IoT).

[0069] The display device 10 may be generally rectangular in plan view. For example, the display device 10 may have a generally rectangular planar shape having a short side in a first direction (X-axis direction) and a long side in a second direction (Y-axis direction). Each angle where the short side extending in the first direction (X-axis direction) meets the long side extending in the second direction (Y-axis direction) may be generally right-angled or generally circular with a predetermined curvature. The planar shape of the display device 10 is not limited to a generally rectangular shape, but may also be other generally polygonal, generally circular, or generally elliptical shapes. For example, the display device 10 may be formed as generally flat, but exemplary embodiments are not necessarily limited thereto. For another example, the display device 10 may be curved with a predetermined curvature.

[0070] The display device 10 may include a cover window 1100, a touch sensing device 1200, a display panel 1300, a sound generator 510, and a bottom cover 1800. The cover window 1100 may be disposed above the display panel 1300 to cover the upper surface of the display panel 1300. The cover window 1100 may protect the upper surface of the display panel 1300. For example, the cover window 1100 may be attached to the touch sensing device 1200 using an adhesive member. The adhesive member may be an optically clear adhesive film (OCA) or an optically clear resin (OCR).

[0071] The cover window 1100 may include a light-transmitting portion for displaying an image from the display panel 1300 and a light-blocking portion corresponding to the area other than the light-transmitting portion. The light-blocking portion of the cover window 1100 may be opaque to prevent unwanted components other than the image from being visible to the user. Alternatively, the light-blocking portion of the cover window 1100 may be formed as a decorative layer with a pattern shown to the user when no image is displayed. For example, the light-blocking portion of the cover window 1100 may be patterned with a company logo or various characters.

[0072] For example, the cover window 1100 may be made of glass, sapphire, or plastic, but the exemplary embodiments are not limited to these. The cover window 1100 may be rigid or flexible. A touch sensing device 1200 may be disposed between the cover window 1100 and the display panel 1300. The touch sensing device 1200 may sense the user's touch position and may be implemented as capacitive (such as self-capacitance or mutual capacitance) or infrared.

[0073] The touch sensing device 1200 can be disposed on the upper substrate of the display panel 1300. Alternatively, the touch sensing device 1200 can be integrally formed with the display panel 1300. In this case, the upper substrate of the display panel 1300 can be omitted, and the touch sensing device 1200 can be formed on the encapsulation film of the display panel 1300. For example, the touch sensing device 1200 may also include a pressure sensor capable of sensing the pressure of a user.

[0074] For example, the display device 10 may also include a polarizing film on the touch sensing device 1200 to prevent the visibility of the image displayed on the display panel 1300 from being reduced due to the reflection of external light by the lines of the touch sensing device 1200 or the lines of the display panel 1300.

[0075] Touch sensing device 1200 may include touch circuit board 1210 and touch driver 1220. Touch circuit board 1210 may be disposed on one side of touch sensing device 1200. For example, touch circuit board 1210 may be attached to a pad (also referred to as a solder pad or solder joint) disposed on one side of touch sensing device 1200 via an anisotropic conductive film. Touch circuit board 1210 may include touch connection terminals, and touch connection terminals may be connected to connectors of display circuit board 1310. Touch circuit board 1210 may be a flexible printed circuit board or chip-on-film.

[0076] The touch driver 1220 can be formed as an integrated circuit and mounted on the touch circuit board 1210. The touch driver 1220 can be electrically connected to the touch electrodes of the touch sensing device 1200 via the touch circuit board 1210. The touch driver 1220 can transmit touch driving signals to the driving electrodes within the touch electrodes and receive sensing signals from the sensing electrodes within the touch electrodes. The touch driver 1220 can output touch data, including the user's touch coordinates, by detecting changes in capacitance between the driving electrodes and the sensing electrodes based on the sensing signals.

[0077] The display panel 1300 may include a display area DA in which a plurality of pixels are formed to display an image, and a non-display area NDA disposed around the display area DA. The display area DA may include pixels, scan lines, emission control lines, data lines, and voltage supply lines connected to the pixels. The scan lines and emission control lines may extend substantially parallel to each other in a first direction (X-axis direction), and the data lines and voltage supply lines may extend substantially parallel to each other in a second direction (Y-axis direction) intersecting the first direction (X-axis direction).

[0078] The non-display area NDA can be a region extending from the outside of the display area DA to the edge of the display panel 1300. For example, the non-display area NDA may include a scan driver that transmits scan signals to scan lines, an emission control driver that transmits emission signals to emission control lines, a fan-out line disposed between the data line and the pad, and a pad connected to the flexible film 1390. For example, the pad may be disposed on the edge of the display panel 1300.

[0079] Display panel 1300 may include display circuit board 1310, display driver 1320, sound driver 1330, and flexible film 1390. Display circuit board 1310 may be attached to one side of display panel 1300. For example, one end of display circuit board 1310 may be attached to a pad disposed on one side of display panel 1300 via an anisotropic conductive film. Touch circuit board 1210 and display circuit board 1310 may be flexible printed circuit boards and may be bent generally downwards from the top of display panel 1300. Display circuit board 1310 may be connected to touch connection terminals of touch circuit board 1210 via a connector.

[0080] The display driver 1320 can be disposed on the flexible film 1390 to supply signals and voltages for driving the display panel 1300. For example, the display driver 1320 can receive digital video data and timing signals from the main circuit board, convert the digital video data into analog positive / negative data voltages, and supply the analog positive / negative data voltages to the data lines via pads. The display driver 1320 can supply scan control signals for controlling the scan driver via scan control lines. In addition, the display driver 1320 can supply the power voltage required to drive the sub-pixels of the display panel 1300 to the pads.

[0081] The display driver 1320 may be formed as an integrated circuit and mounted on the flexible film 1390, but the exemplary embodiments are not limited thereto. For example, the display driver 1320 may be attached to one side of the display panel 1300.

[0082] A sound driver 1330 may be disposed on a display circuit board 1310 to supply sound signals to a sound generator 510. The sound driver 1330 may receive sound data from the main circuit board. For example, the sound data may include information about the frequency band of the sound, the sound pressure level of the sound, and the amplitude of the sound. The sound driver 1330 may generate sound signals based on the sound data and supply the sound signals to the sound generator 510. For example, the sound driver 1330 may be formed as an integrated circuit.

[0083] One side of the flexible film 1390 can be attached to the lower surface of the display panel 1300 using an anisotropic conductive film. The other side of the flexible film 1390 can be attached to the upper surface of the display circuit board 1310 using an anisotropic conductive film. For example, the flexible film 1390 can be a flexible film that can be bent.

[0084] The flexible film 1390 can be omitted, and the display circuit board 1310 can be directly attached to one side of the display panel 1300. In this case, one side of the display panel 1300 can be bent toward the lower surface of the display panel 1300.

[0085] A sound generator 510 can be disposed on the surface of the display panel 1300 to cause the display panel 1300 to vibrate. The sound generator 510 can be attached to the lower surface of the display panel 1300 using an adhesive member such as a pressure-sensitive adhesive. For example, the sound generator 510 can be a piezoelectric element or piezoelectric actuator that vibrates the display panel 1300 by using a piezoelectric material that contracts or expands according to an applied voltage. The sound generator 510 is like... Figure 2 It is shaped like a roughly rectangular prism, but the exemplary embodiments are not limited thereto.

[0086] The bottom cover 1800 can be disposed below the display panel 1300 and the sound generator 510. The bottom cover 1800 can form the bottom shape of the display device 10. The bottom cover 1800 can be formed in a bowl shape to accommodate the display panel 1300. The sidewalls of the bottom cover 1800 can contact the edge of the cover window 1100. In this case, the sidewalls of the bottom cover 1800 can be attached to the edge of the cover window 1100 by means of an adhesive member.

[0087] Figure 3 yes Figure 2 A bottom view of the display device.

[0088] Reference Figure 3 A sound generator 510 can be disposed on the lower surface 1305 of the display panel 1300 and electrically connected to a sound driver 1330 disposed on the display circuit board 1310 via a flexible circuit board 1350. The sound generator 510 can be attached to the lower surface 1305 of the display panel 1300 using an adhesive member such as a pressure-sensitive adhesive. Therefore, the sound generator 510 can cause the display panel 1300 to vibrate by vibrating in the thickness direction (Z-axis direction) of the display panel 1300.

[0089] The display panel 1300 may include multiple side surfaces. For example, the display panel 1300 may include a first side surface 1301 to a fourth side surface 1304 that are substantially perpendicular or substantially parallel to each other. The first side surface 1301 of the display panel 1300 may be the upper side surface of the display panel 1300 in a plan view, and the second side surface 1302 may be the lower side surface corresponding to the first side surface 1301. The third side surface 1303 of the display panel 1300 may be the left side surface of the display panel 1300 in a plan view, and the fourth side surface 1304 may be the right side surface corresponding to the third side surface 1303. The first side surface 1301 and the second side surface 1302 may be substantially perpendicular to the third side surface 1303 and the fourth side surface 1304, respectively.

[0090] The sound generator 510 may include a plurality of side surfaces corresponding to the side surfaces of the display panel 1300, respectively. Therefore, the shape of the sound generator 510 may be determined by the shape of the display panel 1300. For example, the sound generator 510 may include a first side surface 511 to a fourth side surface 514 corresponding to the first side surface 1301 to the fourth side surface 1304 of the display panel 1300, respectively.

[0091] The corresponding distances between the side surface of the sound generator 510 and the corresponding side surfaces of the display panel 1300 can be substantially equal. The corresponding distances between the first side surface 511 to the fourth side surface 514 of the sound generator 510 and the first side surface 1301 to the fourth side surface 1304 of the display panel 1300 can be substantially equal. If the error between the corresponding distances between the side surfaces of the sound generator 510 and the side surfaces of the display panel 1300 is less than approximately 10%, then the corresponding distances between the side surfaces of the sound generator 510 and the side surfaces of the display panel 1300 can be substantially equal.

[0092] For example, the first distance d1 between the first side surface 511 of the sound generator 510 and the first side surface 1301 of the display panel 1300 can be substantially equal to the second distance d2 between the second side surface 512 of the sound generator 510 and the second side surface 1302 of the display panel 1300 (d1 = d2). The third distance d3 between the third side surface 513 of the sound generator 510 and the third side surface 1303 of the display panel 1300 can be substantially equal to the fourth distance d4 between the fourth side surface 514 of the sound generator 510 and the fourth side surface 1304 of the display panel 1300 (d3 = d4). Furthermore, the first distance d1 and the second distance d2 can be substantially equal to the third distance d3 and the fourth distance d4, respectively (d1 = d2 = d3 = d4). Because the first distance d1 to the fourth distance d4 are substantially equal, vibrations generated from the first side surface 511 to the fourth side surface 514 of the sound generator 510 can reach the first side surface 1301 to the fourth side surface 1304 of the display panel 1300 substantially simultaneously. In this case, the vibrations reaching the first side surface 1301 to the fourth side surface 1304 of the display panel 1300 can have substantially the same amplitude and phase. Furthermore, vibrations returning to the sound generator 510 after reaching the first side surface 1301 to the fourth side surface 1304 of the display panel 1300 can reach the first side surface 511 to the fourth side surface 514 of the sound generator 510 substantially simultaneously. Even in this case, the vibrations reaching the first side surface 511 to the fourth side surface 514 of the sound generator 510 can have substantially the same amplitude and phase.

[0093] Therefore, the display device 10, which includes a sound generator 510 and a display panel 1300 set according to a first distance d1 to a fourth distance d4, can improve the sound pressure level of the sound output from the display panel 1300. The display device 10 optimizes the constructive and destructive interference between multiple vibrations of the display panel 1300, thereby minimizing sound distortion to improve the bass reproduction band and enhance the sound pressure level.

[0094] For example, the length L of the first side surface 511 of the sound generator 510 1sg The length L of the third side surface 513, which is approximately perpendicular to the first side surface 511, is... 2sg The ratio can be substantially equal to the length L of the first side surface 1301 of the display panel 1300 corresponding to the first side surface 511 of the sound generator 510. 1dp The length L of the third side surface 1303, which is approximately perpendicular to the first side surface 1301, is... 2dp The ratio. If the corresponding lengths L of the first side surface 511 and the third side surface 513 of the sound generator 510 are... 1sg and L 2sgThe ratio is related to the corresponding length L of the first side surface 1301 and the third side surface 1303 of the display panel 1300. 1dp and L 2dp If the error between the ratios is less than about 10%, then the corresponding lengths L of the first side surface 511 and the third side surface 513 of the sound generator 510 are... 1sg and L 2sg The ratio is related to the corresponding length L of the first side surface 1301 and the third side surface 1303 of the display panel 1300. 1dp and L 2dp The ratios can be substantially equal. Because the shape of the sound generator 510 is substantially the same as the shape of the display panel 1300, the distances between the first side surface 511 to the fourth side surface 514 of the sound generator 510 and the first side surface 1301 to the fourth side surface 1304 of the display panel 1300 can all be substantially equal. Therefore, since the distances d1, d2, d3, and d4 from all side surfaces of the sound generator 510 to all side surfaces of the display panel 1300 are substantially equal, the total harmonic distortion (THD) can be minimized, and the sound pressure level of the display device 10 can be increased.

[0095] Display circuit board 1310 can be electrically connected to main circuit board via cable 1312, and sound driver 1330 can receive sound data from main circuit board via cable 1312. Sound driver 1330 can be disposed on one surface of display circuit board 1310, and first connector 1311 and second connector 1313 can be disposed on another surface of display circuit board 1310. For example, first connector 1311 may include an insertion portion connected to a first connection terminal disposed at one end of cable 1312. Second connector 1313 may include an insertion portion connected to a connection terminal disposed at one end of flexible circuit board 1350.

[0096] A first connecting terminal located at one end of cable 1312 can be inserted into the insertion portion of first connector 1311. A second connecting terminal located at the other end of cable 1312 can be inserted into the insertion portion of main connector on main circuit board.

[0097] Figure 4 It is along Figure 3 A sectional view taken from line I-I'. Figure 5 yes Figure 4 A cross-sectional view of the pixel array layer.

[0098] Reference Figure 4 and Figure 5 The display panel 1300 may include a substrate SUB, a pixel array layer PAL, a polarizing film PF, and a panel under-panel component LPM.

[0099] The substrate SUB can be a matrix substrate and can be made of an insulating material such as a polymer resin. For example, the substrate SUB can be a rigid substrate. As another example, the substrate SUB can be a flexible substrate that can be bent, folded, rolled, etc. When the substrate SUB is a flexible substrate, it can be made of polyimide (PI), but exemplary embodiments are not necessarily limited to this.

[0100] The pixel array layer (PAL) can be disposed on the substrate (SUB). The PAL can display images using multiple pixels connected to multiple data lines and multiple gate lines. The PAL may include a buffer layer (BF), a thin-film transistor layer (TFTL), a light-emitting element layer (EDL), and a packaging layer (TFE).

[0101] A buffer layer BF may be disposed on a substrate SUB. The buffer layer BF may be composed of an inorganic layer that can prevent the introduction of air or moisture. For example, the buffer layer BF may include multiple inorganic layers stacked alternately. The buffer layer BF may be a multilayer in which one or more inorganic layers selected from silicon nitride, silicon oxynitride, silicon oxide, titanium oxide, and aluminum oxide layers are stacked alternately, but exemplary embodiments are not limited thereto.

[0102] A thin-film transistor layer (TFTL) may include thin-film transistors, a gate insulating layer (GI), an interlayer insulating film (ILD), a passivation layer (PAS), and a planarization layer (OC). The thin-film transistors may be disposed on a buffer layer (BF) to form pixel circuitry. For example, the thin-film transistor may be a driving transistor or a switching transistor for the pixel circuitry. Each of the thin-film transistors may include a semiconductor layer (ACT), a gate electrode (GE), a source electrode (SE), and a drain electrode (DE).

[0103] The semiconductor layer ACT can be disposed on the buffer layer BF. The semiconductor layer ACT can be stacked with the gate electrode GE, the source electrode SE, and the drain electrode DE. The semiconductor layer ACT can directly contact the source electrode SE and the drain electrode DE, and can face the gate electrode GE, with the gate insulating layer GI inserted between the semiconductor layer ACT and the gate electrode GE.

[0104] The gate electrode GE can be disposed on the gate insulating layer GI. The gate electrode GE can be stacked with the semiconductor layer ACT, and the gate insulating layer GI can be inserted between the gate electrode GE and the semiconductor layer ACT.

[0105] The source electrode SE and drain electrode DE can be disposed on the interlayer insulating film ILD and spaced apart from each other. The source electrode SE can contact one end of the semiconductor layer ACT through contact holes disposed in the gate insulating layer GI and the interlayer insulating film ILD. The drain electrode DE can contact the other end of the semiconductor layer ACT through contact holes disposed in the gate insulating layer GI and the interlayer insulating film ILD. The drain electrode DE can be connected to the anode AE ​​of each light-emitting element EL.

[0106] The gate insulating layer GI can be disposed on the semiconductor layer ACT. For example, the gate insulating layer GI can be disposed on the semiconductor layer ACT and the buffer layer BF, and can insulate the semiconductor layer ACT from the gate electrode GE. The gate insulating layer GI may include contact holes through which the source electrode SE passes and through which the drain electrode DE passes.

[0107] An interlayer insulating film (ILD) can be disposed on the gate electrode GE. For example, the ILD may include contact holes through which the source electrode SE passes and contact holes through which the drain electrode DE passes. Here, the contact holes of the ILD can be connected to the contact holes of the gate insulating layer GI.

[0108] A passivation layer (PAS) can be disposed on a thin-film transistor to protect it. For example, the passivation layer (PAS) may include a contact hole through which the anode (AE) of a light-emitting element (EL) passes.

[0109] A planarization layer OC can be disposed on a passivation layer PAS to planarize the upper surface of the thin-film transistor. For example, the planarization layer OC may include a contact hole through which the anode AE ​​of the light-emitting element EL passes.

[0110] The light-emitting element layer (EDL) may include light-emitting elements (EL) and pixel-defining layers (PDL). The light-emitting elements (EL) may be disposed on thin-film transistors. Each of the light-emitting elements (EL) may include an anode (AE), a light-emitting layer (E), and a cathode (CE). The anode (AE) may be disposed on a planarization layer (OC). For example, the anode (AE) may be configured to overlap with each opening region (OA) defined by the pixel-defining layer (PDL). Furthermore, the anode (AE) may be connected to the drain electrode (DE) of each thin-film transistor.

[0111] The light-emitting layer E can be disposed on the anode AE. The light-emitting layer E may include a hole injection layer, a hole transport layer, a light-receiving layer, an electron blocking layer, an electron transport layer, and so on. For example, the light-emitting layer E may be an organic light-emitting layer made of organic materials, but the exemplary embodiments are not limited thereto. When the light-emitting layer E is an organic light-emitting layer, the thin-film transistor can apply a predetermined voltage to the anode AE ​​of the light-emitting element EL, and the cathode CE of the light-emitting element EL can receive a common voltage or a cathode voltage. Furthermore, holes and electrons can move to the light-emitting layer E through the hole transport layer and the electron transport layer, respectively, and combine in the light-emitting layer E to emit light.

[0112] The cathode CE can be disposed on the light-emitting layer E. For example, the cathode CE can be implemented as an electrode shared by all pixels, without distinction between pixels. For example, the cathode CE can be disposed on the light-emitting layer E in each opening region OA, and on the pixel defining layer PDL in each non-opening region. The pixel defining layer PDL can define the opening region OA. The pixel defining layer PDL can separate and insulate the corresponding anodes AE of the light-emitting element EL from each other.

[0113] A TFE encapsulation layer can be placed on the cathode (CE) to cover the light-emitting element (EL). The TFE encapsulation layer prevents oxygen or moisture from penetrating into the light-emitting element (EL).

[0114] A polarizing film PF can be disposed on the pixel array layer PAL to prevent reduced visibility due to reflection of external light. The polarizing film PF may include a linear polarizer and a retardation film such as a quarter-wavelength (λ / 4) plate. For example, the retardation film may be disposed on the pixel array layer PAL, and the linear polarizer may be disposed between the retardation film and the cover window 1100.

[0115] The under-panel component LPM can be disposed on the lower surface of the substrate SUB. The under-panel component LPM may include at least one of a light-absorbing component for absorbing light incident from the outside, a buffer component for absorbing external impacts, and a heat dissipation component for effectively dissipating heat from the display panel 1300.

[0116] The light-absorbing component can be disposed below the substrate SUB. The light-absorbing component blocks the transmission of light to prevent components disposed below the light-absorbing component (e.g., display circuit board 1310, sound generator 510, etc.) from being seen from above the display panel 1300.

[0117] A buffer component can be disposed below the light-absorbing component. The buffer component absorbs external impacts to prevent damage to the display panel 1300. For example, the buffer component can be made of polymer resin or a resilient material. A heat dissipation component can be disposed below the buffer component. The heat dissipation component can include a material capable of shielding electromagnetic waves and possessing excellent thermal conductivity.

[0118] Alternatively, the under-panel component LPM can be omitted. When the under-panel component LPM is omitted, the display circuit board 1310 and the sound generator 510 can be disposed on the lower surface of the substrate SUB. The cover window 1100 can be disposed on the polarizing film PF to protect the upper surface of the display panel 1300. The display driver 1320 can be disposed on the flexible film 1390 to supply signals and voltages for driving the display panel 1300.

[0119] One side of the flexible film 1390 can be attached to one side of the substrate SUB, and the other side of the flexible film 1390 can be attached to one side of the display circuit board 1310. The other side of the flexible film 1390 can be attached to the surface of the substrate SUB using an anisotropic conductive film. The other side of the flexible film 1390 can be attached to the surface of the display circuit board 1310 using an anisotropic conductive film. The other surface opposite to the surface of the display circuit board 1310 can face the under-panel component LPM.

[0120] The sound driver 1330 may be disposed on the surface of the display circuit board 1310, and the second connector 1313 may be disposed on the other surface of the display circuit board 1310. The second connector 1313 may include an insertion portion that is connected to a connection terminal disposed at one end of the flexible circuit board 1350.

[0121] The sound generator 510 can be attached to the lower surface of the panel under-panel component LPM via adhesive member 1610, and can cause the display panel 1300 to vibrate. The sound generator 510 can output sound by causing the display panel 1300 to vibrate. For example, adhesive member 1610 can be a pressure-sensitive adhesive. The sound generator 510 can be electrically connected to the sound driver 1330 via flexible circuit board 1350.

[0122] Figure 6 yes Figure 3 A cross-sectional view of a sound generator. Figure 7 The diagram shows the setting for making the setting Figure 6 An exemplary process for vibrating the vibration layer between the first branch electrode and the second branch electrode of a sound generator.

[0123] Reference Figure 3 , Figure 6 and Figure 7 The sound generator 510 may be a piezoelectric element or piezoelectric actuator that vibrates the display panel 1300 by using a piezoelectric material that contracts or expands according to an applied voltage. The sound generator 510 may include a vibrating layer 511a, a first electrode 512a, and a second electrode 513a.

[0124] The vibrating layer 511a can be a piezoelectric element that deforms according to the driving voltage applied to the first electrode 512a and the driving voltage applied to the second electrode 513a. In this case, the vibrating layer 511a can be any of a piezoelectric material (such as polyvinylidene fluoride (PVDF) or lead zirconate titanate (PZT)) and an electroactive polymer.

[0125] Because the vibrating layer 511a is manufactured at a high temperature, the first electrode 512a and the second electrode 513a can be made of silver (Ag) or an alloy of Ag and palladium (Pd) with high melting points. When the first electrode 512a and the second electrode 513a are made of an alloy of Ag and Pd, the Ag content can be higher than the Pd content.

[0126] The vibration layer 511a may be disposed between each pair of first branch electrodes 5122 and second branch electrodes 5132. For example, the vibration layer 511a may contract or expand according to the difference between the driving voltage applied to each first branch electrode 5122 and the driving voltage applied to the corresponding second branch electrode 5132.

[0127] The first electrode 512a and the second electrode 513a can be connected to the pad of the flexible circuit board 1350. The pad of the flexible circuit board 1350 can be connected to the first electrode 512a and the second electrode 513a exposed on the surface of the sound generator 510.

[0128] The first electrode 512a may include a first main electrode 5121 and a first branch electrode 5122. For example, the first main electrode 5121 may be disposed on at least one side surface of the vibrating layer 511a. In another example, the first main electrode 5121 may penetrate a portion of the vibrating layer 511a. In yet another example, the first main electrode 5121 may be disposed on the upper surface of the vibrating layer 511a. The first branch electrode 5122 may branch from the first main electrode 5121. The first branch electrodes 5122 may be arranged substantially parallel to each other.

[0129] The second electrode 513a may include a second main electrode 5131 and a second branch electrode 5132. The second electrode 513a may be spaced apart from the first electrode 512a. The second electrode 513a may be electrically insulated from the first electrode 512a. The second main electrode 5131 may be disposed on at least one side surface of the vibrating layer 511a. For example, the first main electrode 5121 may be disposed on one side surface of the vibrating layer 511a, and the second main electrode 5131 may be disposed on the other side surface of the vibrating layer 511a. In another example, the second main electrode 5131 may penetrate a portion of the vibrating layer 511a. In another example, the second main electrode 5131 may be disposed on the upper surface of the vibrating layer 511a. The second branch electrode 5132 may branch from the second main electrode 5131. The second branch electrodes 5132 may be arranged substantially parallel to each other.

[0130] The first branch electrode 5122 and the second branch electrode 5132 can be alternately arranged in the vertical direction (Z-axis direction). For example, the first branch electrode 5122 and the second branch electrode 5132 can be repeatedly arranged in the vertical direction (Z-axis direction) in the order of first branch electrode 5122, second branch electrode 5132, first branch electrode 5122 and second branch electrode 5132.

[0131] In another example, the first branch electrode 5122 and the second branch electrode 5132 may be arranged approximately parallel to each other in a generally horizontal direction (X-axis direction or Y-axis direction).

[0132] exist Figure 6 In this embodiment, when the polarization direction of the vibrating layer 511a disposed between the first branch electrode 5122 and the second branch electrode 5132 disposed above the first branch electrode 5122 is approximately upward (↑), the vibrating layer 511a can have a positive polarity in the upper region adjacent to the second branch electrode 5132 and a negative polarity in the lower region adjacent to the first branch electrode 5122. In another example, when the polarization direction of the vibrating layer 511a disposed between the first branch electrode 5122 and the second branch electrode 5132 disposed below the first branch electrode 5122 is approximately downward (↓), the vibrating layer 511a can have a negative polarity in the upper region adjacent to the first branch electrode 5122 and a positive polarity in the lower region adjacent to the second branch electrode 5132. The polarization direction of the vibrating layer 511a can be determined by a polarization process in which an electric field is applied to the vibrating layer 511a using the first branch electrode 5122 and the second branch electrode 5132.

[0133] exist Figure 7 In this embodiment, when the polarization direction of the vibrating layer 511a disposed between the first branch electrode 5122 and the second branch electrode 5132 disposed above the first branch electrode 5122 is approximately upward (↑), if a negative driving voltage is applied to the first branch electrode 5122 and a positive driving voltage is applied to the second branch electrode 5132, the vibrating layer 511a can contract according to a first force F1. The first force F1 can be a contraction force. In another example, when the polarization direction of the vibrating layer 511a is approximately upward (↑), if a positive driving voltage is applied to the first branch electrode 5122 and a negative driving voltage is applied to the second branch electrode 5132, the vibrating layer 511a can expand according to a second force F2. The second force F2 can be a tension force.

[0134] In Figure 7In different examples, when the polarization direction of the vibrating layer 511a disposed between the first branch electrode 5122 and the second branch electrode 5132 disposed above the first branch electrode 5122 is approximately downward (↓), if a negative driving voltage is applied to the first branch electrode 5122 and a positive driving voltage is applied to the second branch electrode 5132, the vibrating layer 511a can expand according to the tensile force. In another example, when the polarization direction of the vibrating layer 511a is approximately downward (↓), if a positive driving voltage is applied to the first branch electrode 5122 and a negative driving voltage is applied to the second branch electrode 5132, the vibrating layer 511a can contract according to the contractile force.

[0135] Therefore, when the driving voltage applied to the first electrode 512a and the driving voltage applied to the second electrode 513a repeatedly alternate between positive and negative polarities, the vibrating layer 511a can repeatedly contract and expand. The sound generator 510 can vibrate through the repeated contraction and expansion of the vibrating layer 511a. When the vibrating layer 511a of the sound generator 510 vibrates, the display panel 1300 can vibrate in a third direction (Z-axis direction) that is the thickness direction of the display panel 1300 due to stress. The display panel 1300 vibrating due to the sound generator 510 can output sound.

[0136] The sound generator 510 may also include a protective layer 519 surrounding the lower and side surfaces. For example, the protective layer 519 may comprise an insulating material or the same material as the vibrating layer 511a. The protective layer 519 may be disposed on the first electrode 512a, the second electrode 513a, and the vibrating layer 511a exposed but not covered by the first electrode 512a and the second electrode 513a. The protective layer 519 may surround and protect the vibrating layer 511a, the first electrode 512a, and the second electrode 513a, but may also be omitted.

[0137] Figure 8 yes Figure 2 A bottom view of another exemplary embodiment of the display device. Figure 8 The display device 11 and Figure 3 The difference between the display device 10 and the sound generator 510 lies in the construction of the sound generator 510. Therefore, descriptions of the same components as those described above will be given briefly or omitted to avoid redundancy.

[0138] Reference Figure 8The display device 11 may include a plurality of sound generators, each of which includes one or more side surfaces corresponding to a plurality of side surfaces of the display panel 1300. For example, the sound generators may include a first sound generator 520 and a second sound generator 530. The first sound generator 520 and the second sound generator 530 may be spaced apart from each other in a direction substantially perpendicular to the first side surface 1301 and the second side surface 1302 of the display panel 1300. Therefore, the first sound generator 520 and the second sound generator 530 may be spaced apart from each other in a second direction (Y-axis direction).

[0139] The first sound generator 520 and the second sound generator 530 can be disposed on the lower surface of the display panel 1300. The first sound generator 520 and the second sound generator 530 can be electrically connected to the sound driver 1330 on the display circuit board 1310 via the first flexible circuit board 1351 and the second flexible circuit board 1352, respectively. The first sound generator 520 and the second sound generator 530 can be attached to the lower surface of the display panel 1300 using an adhesive member such as a pressure-sensitive adhesive. Therefore, the first sound generator 520 and the second sound generator 530 can cause the display panel 1300 to vibrate by vibrating in the thickness direction (Z-axis direction) of the display panel 1300.

[0140] The display panel 1300 may include multiple side surfaces, such as first side surfaces 1301 to fourth side surfaces 1304 that are substantially perpendicular or substantially parallel to each other. The first side surface 1301 of the display panel 1300 may be the upper side surface of the display panel 1300 in a plan view, and the second side surface 1302 may be the lower side surface corresponding to the first side surface 1301. The third side surface 1303 of the display panel 1300 may be the left side surface of the display panel 1300 in a plan view, and the fourth side surface 1304 may be the right side surface corresponding to the third side surface 1303. The first side surface 1301 and the second side surface 1302 may be substantially perpendicular to the third side surface 1303 and the fourth side surface 1304, respectively.

[0141] Each of the first sound generator 520 and the second sound generator 530 may include one or more side surfaces corresponding to the side surfaces of the display panel 1300, respectively. For example, the first sound generator 520 may include first side surfaces 521 to fourth side surfaces 524, and the second sound generator 530 may include first side surfaces 531 to fourth side surfaces 534. The first side surface 521, third side surface 523, and fourth side surface 524 of the first sound generator 520 may correspond to the first side surface 1301, third side surface 1303, and fourth side surface 1304 of the display panel 1300, respectively. The second side surface 532 to fourth side surface 534 of the second sound generator 530 may correspond to the second side surface 1302 to fourth side surface 1304 of the display panel 1300, respectively.

[0142] The corresponding distances between the side surface of the display panel 1300 and the corresponding side surfaces of each of the first sound generator 520 and the second sound generator 530 to the side surface of the display panel 1300 can be substantially equal. If the error between the corresponding distances between the side surfaces of each of the first sound generator 520 and the second sound generator 530 and the side surface of the display panel 1300 is less than about 10%, then the corresponding distances between the side surfaces of each of the first sound generator 520 and the second sound generator 530 and the side surface of the display panel 1300 can be substantially equal. For example, the first distance d1 between the first side surface 521 of the first sound generator 520 and the first side surface 1301 of the display panel 1300 can be substantially equal to the second distance d2 between the second side surface 532 of the second sound generator 530 and the second side surface 1302 of the display panel 1300 (d1 = d2). The third distance d3 between the third side surface 523 of the first sound generator 520 or the third side surface 533 of the second sound generator 530 and the third side surface 1303 of the display panel 1300 can be substantially equal to the fourth distance d4 between the fourth side surface 524 of the first sound generator 520 or the fourth side surface 534 of the second sound generator 530 and the fourth side surface 1304 of the display panel 1300 (d3 = d4). Furthermore, the first distance d1 and the second distance d2 can be substantially equal to the third distance d3 and the fourth distance d4, respectively (d1 = d2 = d3 = d4).

[0143] Because the first distance d1 to the fourth distance d4 are substantially equal, vibrations generated from the first side surface 521, the third side surface 523, and the fourth side surface 524 of the first sound generator 520, and vibrations generated from the second side surface 532 to the fourth side surface 534 of the second sound generator 530, can reach the first side surface 1301 to the fourth side surface 1304 of the display panel 1300 substantially simultaneously. In this case, the vibrations reaching the first side surface 1301 to the fourth side surface 1304 of the display panel 1300 can have substantially the same amplitude and phase. Furthermore, vibrations that return to the first sound generator 520 and the second sound generator 530 after reaching the first side surface 1301 to the fourth side surface 1304 of the display panel 1300 can reach the first sound generator 520 and the second sound generator 530 substantially simultaneously. Even in this case, the vibrations reaching the first sound generator 520 and the second sound generator 530 can have substantially the same amplitude and phase.

[0144] Therefore, the display device 11, including the first sound generator 520 and the second sound generator 530 set according to the first distance d1 to the fourth distance d4 and the display panel 1300, can improve the sound pressure level of the sound output from the display panel 1300. The display device 11 optimizes the constructive and destructive interference between multiple vibrations of the display panel 1300, thereby minimizing sound distortion to improve the bass reproduction band and enhance the sound pressure level.

[0145] For example, the display device 11 may include a sound generating region, which includes a first sound generator 520 and a second sound generator 530, and a space between the first sound generator 520 and the second sound generator 530. The ratio of the length of the first side surface and the length of the third side surface of the sound generating region may be substantially equal to the ratio of the length of the first side surface 1301 and the length of the third side surface 1303 of the display panel 1300. If the error between the ratio of the corresponding lengths of the first side surface and the third side surface of the sound generating region and the ratio of the corresponding lengths of the first side surface 1301 and the third side surface 1303 of the display panel 1300 is less than about 10%, then the ratio of the corresponding lengths of the first side surface and the third side surface of the sound generating region may be substantially equal to the ratio of the corresponding lengths of the first side surface 1301 and the third side surface 1303 of the display panel 1300.

[0146] Because the shape of the sound generating area is substantially the same as that of the display panel 1300, the distances between the multiple side surfaces of the sound generating area and the first side surface 1301 to the fourth side surface 1304 of the display panel 1300 can all be substantially equal. Therefore, since the distances from all side surfaces of the sound generating area to all side surfaces of the display panel 1300 are substantially equal, THD can be minimized and the sound pressure level of the display device 11 can be increased.

[0147] Each of the first distances d1 to the fourth distance d4 can be less than the fifth distance d5 between the first sound generator 520 and the second sound generator 530. For example, the fifth distance d5 between the first sound generator 520 and the second sound generator 530 can be greater than the first distance d1 (d5>d1) between the first side surface 521 of the first sound generator 520 and the first side surface 1301 of the display panel 1300. The fifth distance d5 between the first sound generator 520 and the second sound generator 530 can be greater than the second distance d2 (d5>d2) between the second side surface 532 of the second sound generator 530 and the second side surface 1302 of the display panel 1300. The fifth distance d5 between the first sound generator 520 and the second sound generator 530 can be greater than the third distance d3 (d5>d3) between the third side surface 523 of the first sound generator 520 or the third side surface 533 of the second sound generator 530 and the third side surface 1303 of the display panel 1300. The fifth distance d5 between the first sound generator 520 and the second sound generator 530 can be greater than the fourth distance d4 (d5>d4) between the fourth side surface 524 of the first sound generator 520 or the fourth side surface 534 of the second sound generator 530 and the fourth side surface 1304 of the display panel 1300. Because the first sound generator 520 and the second sound generator 530 are spaced apart from each other by a distance greater than the distance from the display panel 1300, vibration interference between the first sound generator 520 and the second sound generator 530 can be minimized. Therefore, the display device 11, which includes the first sound generator 520 and the second sound generator 530 spaced apart from each other by a fifth distance d5 greater than the first distance d1 to the fourth distance d4, can minimize sound distortion and increase the sound pressure level.

[0148] Figure 9 yes Figure 2 A bottom view of another exemplary embodiment of the display device. Figure 9 The display device 12 and Figure 3 The difference between the display device 10 and the sound generator 510 lies in the construction of the sound generator 510. Therefore, descriptions of the same components as those described above will be given briefly or omitted to avoid redundancy.

[0149] Reference Figure 9 The display device 12 may include a display panel 1300 and a sound generator 510. The display panel 1300 may include a first side surface 1301 to a fourth side surface 1304 that are generally perpendicular or generally parallel to each other. The sound generator 510 may include a first side surface 511 to a fourth side surface 514 that correspond to the first side surface 1301 to the fourth side surface 1304 of the display panel 1300, respectively.

[0150] The corresponding distances between the first side surface 511, the third side surface 513, and the fourth side surface 514 of the sound generator 510 and the first side surface 1301, the third side surface 1303, and the fourth side surface 1304 of the display panel 1300 can be substantially equal. If the error between the corresponding distances d1, d3, and d4 between the first side surface 511, the third side surface 513, and the fourth side surface 514 of the sound generator 510 and the first side surface 1301, the third side surface 1303, and the fourth side surface 1304 of the display panel 1300 is less than about 10%, then the corresponding distances between the first side surface 511, the third side surface 513, and the fourth side surface 514 of the sound generator 510 and the first side surface 1301, the third side surface 1303, and the fourth side surface 1304 of the display panel 1300 can be substantially equal.

[0151] The second side surface 512 of the sound generator 510 may face at least one of the display circuit board 1310, the sound driver 1330, and the flexible film 1390. For example, the first distance d1 between the first side surface 511 of the sound generator 510 and the first side surface 1301 of the display panel 1300 may be substantially equal to the third distance d3 between the third side surface 513 of the sound generator 510 and the third side surface 1303 of the display panel 1300 (d1 = d3). The third distance d3 between the third side surface 513 of the sound generator 510 and the third side surface 1303 of the display panel 1300 may be substantially equal to the fourth distance d4 between the fourth side surface 514 of the sound generator 510 and the fourth side surface 1304 of the display panel 1300 (d3 = d4). Therefore, the first distance d1, the third distance d3, and the fourth distance d4 may be substantially equal to each other.

[0152] Because the first distance d1, the third distance d3, and the fourth distance d4 are substantially equal, vibrations generated from the first side surface 511, the third side surface 513, and the fourth side surface 514 of the sound generator 510 can reach the first side surface 1301, the third side surface 1303, and the fourth side surface 1304 of the display panel 1300 substantially simultaneously. In this case, the vibrations reaching the first side surface 1301, the third side surface 1303, and the fourth side surface 1304 of the display panel 1300 can have substantially the same amplitude and phase. Furthermore, vibrations returning to the sound generator 510 after reaching the first side surface 1301, the third side surface 1303, and the fourth side surface 1304 of the display panel 1300 can reach the first side surface 511, the third side surface 513, and the fourth side surface 514 of the sound generator 510 substantially simultaneously. Even under these conditions, the vibrations reaching the first side surface 511, the third side surface 513, and the fourth side surface 514 of the sound generator 510 can have substantially the same amplitude and phase.

[0153] The second distance d2 between the second side surface 512 of the sound generator 510 and the second side surface 1302 of the display panel 1300 can be greater than the first distance d1 between the first side surface 511 of the sound generator 510 and the first side surface 1301 of the display panel 1300. Because of the space within which the battery, display circuit board 1310, sound driver 1330, and flexible film 1390 of the display device 12 are housed, the second distance d2 can be greater than the first distance d1. Therefore, the display device 12, including the sound generator 510 and the display panel 1300 arranged according to the first distance d1 to the fourth distance d4, can improve the sound pressure level while maintaining a slim profile.

[0154] Figure 10 yes Figure 2 A bottom view of another exemplary embodiment of the display device. Figure 11 yes Figure 2 A bottom view of another exemplary embodiment of the display device. Figure 12 yes Figure 2 A bottom view of another exemplary embodiment of the display device. Figure 13 It is shown Figures 10 to 12 A graph depicting the sound pressure level versus frequency of an exemplary display device. Figures 10 to 12 The corresponding display devices 13 to 15 include sound generators 510 of the same size located at different positions. Descriptions of elements identical to those described above will be given briefly or omitted to avoid redundancy.

[0155] exist Figure 10The display device 13 may include a sound generator 510 having a long axis in a first direction (X-axis direction) and a display panel 1300 having a long axis in a second direction (Y-axis direction) that is substantially perpendicular to the first direction (X-axis direction).

[0156] The display panel 1300 may include first side surfaces 1301 to fourth side surfaces 1304 that are generally perpendicular or generally parallel to each other. The sound generator 510 may include first side surfaces 511 to fourth side surfaces 514 that correspond to the first side surfaces 1301 to fourth side surfaces 1304 of the display panel 1300, respectively.

[0157] The corresponding distances between the first side surface 511, the third side surface 513, and the fourth side surface 514 of the sound generator 510 and the first side surface 1301, the third side surface 1303, and the fourth side surface 1304 of the display panel 1300 can be substantially equal. The second side surface 512 of the sound generator 510 can face at least one of the display circuit board 1310, the sound driver 1330, and the flexible film 1390. For example, the first distance d1 between the first side surface 511 of the sound generator 510 and the first side surface 1301 of the display panel 1300 can be substantially equal to the third distance d3 between the third side surface 513 of the sound generator 510 and the third side surface 1303 of the display panel 1300 (d1 = d3). The third distance d3 between the third side surface 513 of the sound generator 510 and the third side surface 1303 of the display panel 1300 can be substantially equal to the fourth distance d4 between the fourth side surface 514 of the sound generator 510 and the fourth side surface 1304 of the display panel 1300 (d3 = d4). Therefore, the first distance d1, the third distance d3, and the fourth distance d4 can be substantially equal to each other.

[0158] Because the first distance d1, the third distance d3, and the fourth distance d4 are substantially equal, vibrations generated from the first side surface 511, the third side surface 513, and the fourth side surface 514 of the sound generator 510 can reach the first side surface 1301, the third side surface 1303, and the fourth side surface 1304 of the display panel 1300 substantially simultaneously. In this case, the vibrations reaching the first side surface 1301, the third side surface 1303, and the fourth side surface 1304 of the display panel 1300 can have substantially the same amplitude and phase. Furthermore, vibrations returning to the sound generator 510 after reaching the first side surface 1301, the third side surface 1303, and the fourth side surface 1304 of the display panel 1300 can reach the first side surface 511, the third side surface 513, and the fourth side surface 514 of the sound generator 510 substantially simultaneously. Even under these conditions, the vibrations reaching the first side surface 511, the third side surface 513, and the fourth side surface 514 of the sound generator 510 can have substantially the same amplitude and phase.

[0159] The second distance d2 between the second side surface 512 of the sound generator 510 and the second side surface 1302 of the display panel 1300 can be greater than the first distance d1 between the first side surface 511 of the sound generator 510 and the first side surface 1301 of the display panel 1300.

[0160] exist Figure 11 In the display device 14, a sound generator 510 having a long axis in a first direction (X-axis direction) and a display panel 1300 having a long axis in a second direction (Y-axis direction) substantially perpendicular to the first direction (X-axis direction) may be included.

[0161] The display panel 1300 may include first side surfaces 1301 to fourth side surfaces 1304 that are generally perpendicular or generally parallel to each other. The sound generator 510 may include first side surfaces 511 to fourth side surfaces 514 that correspond to the first side surfaces 1301 to fourth side surfaces 1304 of the display panel 1300, respectively.

[0162] The corresponding distances between the third side surface 513 and the fourth side surface 514 of the sound generator 510 and the third side surface 1303 and the fourth side surface 1304 of the display panel 1300 can be substantially equal. The second side surface 512 of the sound generator 510 can face at least one of the display circuit board 1310, the sound driver 1330, and the flexible film 1390. For example, the third distance d3 between the third side surface 513 of the sound generator 510 and the third side surface 1303 of the display panel 1300 can be substantially equal to the fourth distance d4 between the fourth side surface 514 of the sound generator 510 and the fourth side surface 1304 of the display panel 1300 (d3 = d4).

[0163] The second distance d2 between the second side surface 512 of the sound generator 510 and the second side surface 1302 of the display panel 1300 can be greater than the first distance d1 between the first side surface 511 of the sound generator 510 and the first side surface 1301 of the display panel 1300.

[0164] For example, Figure 11 The second distance d2 in the display device 14 can be less than Figure 10 The second distance d2 in the display device 13. Figure 11 The difference between the second distance d2 and the first distance d1 in the display device 14 can be less than Figure 10 The difference between the second distance d2 and the first distance d1 in the display device 13. Therefore, Figure 11 The sound generator 510 of the display device 14 can be set to be more than Figure 10 The sound generator 510 of the display device 13 is located near the center of the display panel 1300. Therefore, with Figure 10 Compared to display device 13, Figure 11 The display device 14 can more effectively use the display panel 1300 as a vibrating plate.

[0165] exist Figure 12 The display device 15 may include a sound generator 510 having a long axis in a second direction (Y-axis direction) and a display panel 1300 having a long axis in a second direction (Y-axis direction).

[0166] The display panel 1300 may include first side surfaces 1301 to fourth side surfaces 1304 that are generally perpendicular or generally parallel to each other. The sound generator 510 may include first side surfaces 511 to fourth side surfaces 514 that correspond to the first side surfaces 1301 to fourth side surfaces 1304 of the display panel 1300, respectively.

[0167] The first distance d1 between the first side surface 511 of the sound generator 510 and the first side surface 1301 of the display panel 1300 can be substantially equal to the second distance d2 between the second side surface 512 of the sound generator 510 and the second side surface 1302 of the display panel 1300 (d1 = d2). The third distance d3 between the third side surface 513 of the sound generator 510 and the third side surface 1303 of the display panel 1300 can be substantially equal to the fourth distance d4 between the fourth side surface 514 of the sound generator 510 and the fourth side surface 1304 of the display panel 1300 (d3 = d4). Furthermore, the first distance d1 and the second distance d2 can be different from the third distance d3 and the fourth distance d4, respectively. For example, the first distance d1 and the second distance d2 can be greater than the third distance d3 and the fourth distance d4, respectively, but the exemplary embodiments are not limited to this.

[0168] Combination Figures 10 to 12 Reference Figure 13 , Figure 12 The display device 15 can achieve a sound pressure level (SPL) higher than [previous value] in the low-frequency band. Figure 10 The display device 13 and Figure 11 The display device 14 displays the sound pressure level (SPL) in the low-frequency band. For example, in the frequency band of approximately 400 Hz or lower. Figure 12 The sound pressure level (SPL) of the display device 15 can be higher than Figure 10 The display device 13 and Figure 11 The sound pressure level (SPL) of each of the display devices 14.

[0169] and Figure 10 The display device 13 shown is Figure 11 Compared to the ratio of the length of the first side surface 511 to the length of the third side surface 513 in each of the display devices 14 shown, Figure 12 The ratio of the length of the first side surface 511 to the length of the third side surface 513 of the sound generator 510 in the shown display device 15 can be closer to the ratio of the length of the first side surface 1301 to the length of the third side surface 1303 of the display panel 1300. Therefore, Figure 12 The display device 15 shown can improve the bass reproduction band and enhance the sound pressure level by minimizing sound distortion.

[0170] Figure 14 yes Figure 2 A bottom view of another exemplary embodiment of the display device. Figure 15 It shows when Figure 14 A graph depicting the sound pressure level versus frequency as the size of the sound generator of an exemplary display device changes. Figure 16 It shows when Figure 14A graph depicting the total harmonic distortion (THD) versus frequency as the size of the sound generator of an exemplary display device changes.

[0171] Reference Figures 14 to 16 The display device 16 may include a first display device 16_1 to a third display device 16_3, and the first display device 16_1 to the third display device 16_3 include sound generators 510 with different shapes and sizes. Some components in these embodiments are not described or are omitted to avoid redundancy in the discussion of embodiments with similar components.

[0172] The dimensions of the sound generator 510, the dimensions of the display panel 1300, and the ratio of the first distance d1 to the third distance d3 in each of the first display devices 16_1 to the third display devices 16_3 are shown in Table 1 below.

[0173] Table 1

[0174]

[0175] Combination Figure 14 Reference Figure 15 The sound pressure level (SPL) of the sound generator 510 of the third display device 16_3 can drop sharply in the first region A1 to the third region A3. The corresponding sound generators 510 of the first display device 16_1 and the second display device 16_2 can have similar sound pressure levels (SPL).

[0176] Combination Figure 14 Reference Figure 16 The THD of the sound generator 510 of the third display device 16_3 can drop sharply in the fourth region A4. The THD of the sound generator 510 of the second display device 16_2 can drop sharply in the fifth region A5.

[0177] The ratio (d1 / d3) of the first distance d1 and the third distance d3 of the first display device 16_1 can be closest to the ratio (b2 / b1) of the long side and the short side of the display panel 1300. Therefore, the first display device 16_1 can output better sound than the second display device 16_2 and the third display device 16_3.

[0178] Figure 17 This is an exploded perspective view of an exemplary embodiment of a display device constructed according to the principles of the invention.

[0179] Reference Figure 17The display device 20 includes an upper device cover 2110, a lower device cover 2120, a display panel 2300, a flexible film 2321, a display driving circuit 2322, a display circuit board 2340, a cable 2350, a control circuit board 2360, a timing control circuit 2371, a sound driver 2372, and a sound generator 510.

[0180] The upper cover 2110 can cover the edge of the upper surface of the display device 20. The upper cover 2110 can cover the non-display area of ​​the display panel 2300 other than the display area. The lower cover 2120 can be disposed below the display panel 2300 and the sound generator 510. The lower cover 2120 can be configured to cover the display circuit board 2340, cable 2350 and control circuit board 2360 when the flexible film 2321 is bent so that the display circuit board 2340, cable 2350 and control circuit board 2360 are disposed below the display panel 2300.

[0181] The display panel 2300 may include a first substrate 2301 and a second substrate 2302. The second substrate 2302 may face the surface of the first substrate 2301. The first substrate 2301 and the second substrate 2302 may be generally rigid or flexible. The first substrate 2301 may be made of glass or plastic. The second substrate 2302 may be made of glass, plastic, an encapsulation film, or a barrier film. Alternatively, the second substrate 2302 may be omitted.

[0182] The display panel 2300 may be an organic light-emitting display panel using an organic light-emitting diode including a first electrode, an organic light-emitting layer, and a second electrode; an inorganic light-emitting display panel using an inorganic light-emitting diode including a first electrode, an inorganic semiconductor layer, and a second electrode; or a quantum dot light-emitting display panel using a quantum dot light-emitting diode including a first electrode, a quantum dot light-emitting layer, and a second electrode.

[0183] One side of each of the flexible films 2321 can be disposed on the surface of the first substrate 2301 of the display panel 2300, and the other side can be attached to the surface of one of the display circuit boards 2340. For example, because the size of the first substrate 2301 is larger than the size of the second substrate 2302, one side of the first substrate 2301 may be exposed and not covered by the second substrate 2302. The flexible film 2321 can be attached to the exposed side of the first substrate 2301 that is not covered by the second substrate 2302. Each of the flexible films 2321 can be attached to the surface of the first substrate 2301 and the surface of one of the display circuit boards 2340 by using anisotropic conductive films.

[0184] Each of the flexible films 2321 can be a flexible film such as a tape-on-film package or a chip-on-film. The flexible film 2321 can be bent toward the lower surface of the first substrate 2301. In this case, the display circuit board 2340, the cable 2350, and the control circuit board 2360 can be disposed on the lower surface of the first substrate 2301.

[0185] The display driving circuits 2322 can be disposed on the surface of the flexible film 2321. The display driving circuits 2322 can be formed as integrated circuits. Each of the display driving circuits 2322 can convert digital video data into analog data voltage according to the data control signal of the timing control circuit 2371, and supply the analog data voltage to the data lines of the display panel 2300 through the flexible film 2321.

[0186] Display panel 2300 may include scan lines intersecting with data lines and pixels disposed in areas defined by the data lines and scan lines. Scan lines may receive scan signals from scan drivers formed in display panel 2300. Scan drivers may include multiple thin-film transistors to generate scan signals according to scan control signals from timing control circuitry 2371. Each pixel is connected to at least one data line and at least one scan line, and receives a data voltage from the data line when a scan signal is supplied to the scan line.

[0187] Each of the display circuit boards 2340 can be connected to the control circuit board 2360 via a cable 2350. Each of the display circuit boards 2340 may include a connector 2351 for connecting to the cable 2350. The display circuit board 2340 may be a flexible printed circuit board or a printed circuit board. The cable 2350 may be a flexible cable.

[0188] The control circuit board 2360 can be connected to the display circuit board 2340 via a cable 2350. For this purpose, the control circuit board 2360 may include a connector 2351 for connecting to the cable 2350. The control circuit board 2360 may be a flexible printed circuit board or a printed circuit board.

[0189] The timing control circuit 2371 can be disposed on the surface of the control circuit board 2360. The timing control circuit 2371 can be formed as an integrated circuit. The timing control circuit 2371 can receive digital video data and timing signals from the chip on the system circuit board, and generate data control signals for controlling the timing of the display driver circuit 2322 based on the timing signals.

[0190] The sound driver 2372 can be disposed on the surface of the control circuit board 2360. The sound driver 2372 can be formed as an integrated circuit. The sound driver 2372 can receive sound data from the system circuit board. The sound driver 2372 can convert the sound data, which is digital data, into an analog sound signal. The sound driver 2372 can output the sound signal to the sound generator 510.

[0191] The sound generator 510 can be disposed on another surface opposite to the surface of the first substrate 2301. The sound generator 510 can cause the display panel 2300 to vibrate in a third direction (Z-axis direction) according to the sound signal from the sound driver 2372. The sound generator 510 can be a piezoelectric element or a piezoelectric actuator that vibrates the display panel 2300 by using a piezoelectric material that contracts or expands according to an applied voltage.

[0192] Figure 18 Is when Figure 17 A bottom view of the display device when the flexible film is unfolded. Figure 19 yes Figure 17 A bottom view of the display device. Figure 20 It is along Figure 19 The sectional view taken from line II-II'.

[0193] Reference Figures 18 to 20 The sound generator 510 can be disposed on the lower surface of the display panel 2300 and electrically connected to the sound driver 2372 disposed on the control circuit board 2360 via a flexible circuit board 2352. The sound generator 510 can be attached to the lower surface of the display panel 2300 via an adhesive member 2380 such as a pressure-sensitive adhesive. Therefore, the sound generator 510 can cause the display panel 2300 to vibrate by vibrating in the thickness direction (Z-axis direction) of the display panel 2300.

[0194] The display panel 2300 may include multiple side surfaces. For example, the display panel 2300 may include a first to a fourth side surface that are substantially perpendicular or substantially parallel to each other. The first side surface of the display panel 2300 may be the upper side surface of the display panel 2300 in a plan view, and the second side surface may be the lower side surface corresponding to the first side surface. The third side surface of the display panel 2300 may be the left side surface of the display panel 2300 in a plan view, and the fourth side surface may be the right side surface corresponding to the third side surface. The first and second side surfaces may be substantially perpendicular to the third and fourth side surfaces, respectively.

[0195] The sound generator 510 may include a plurality of side surfaces corresponding to the side surfaces of the display panel 2300, respectively. Therefore, the shape of the sound generator 510 may be determined by the shape of the display panel 2300. For example, the sound generator 510 may include a first side surface 511 to a fourth side surface 514 corresponding to the first to fourth side surfaces of the display panel 2300, respectively.

[0196] The corresponding distances between the side surface of the sound generator 510 and the corresponding side surfaces of the display panel 2300 can be substantially equal. The corresponding distances between the first side surface 511 to the fourth side surface 514 of the sound generator 510 and the first side surface to the fourth side surface of the display panel 2300 can also be substantially equal. For example, the first distance d1 between the first side surface 511 of the sound generator 510 and the first side surface of the display panel 2300 can be substantially equal to the second distance d2 between the second side surface 512 of the sound generator 510 and the second side surface of the display panel 2300 (d1 = d2). The third distance d3 between the third side surface 513 of the sound generator 510 and the third side surface of the display panel 2300 can be substantially equal to the fourth distance d4 between the fourth side surface 514 of the sound generator 510 and the fourth side surface of the display panel 2300 (d3 = d4). Furthermore, the first distance d1 and the second distance d2 can be substantially equal to the third distance d3 and the fourth distance d4, respectively (d1 = d2 = d3 = d4).

[0197] Because the first distance d1 to the fourth distance d4 are substantially equal, vibrations generated from the first side surface 511 to the fourth side surface 514 of the sound generator 510 can reach the first side surface to the fourth side surface of the display panel 2300 substantially simultaneously. In this case, the vibrations reaching the first side surface to the fourth side surface of the display panel 2300 can have substantially the same amplitude and phase. Furthermore, vibrations that return to the sound generator 510 after reaching the first side surface to the fourth side surface of the display panel 2300 can reach the first side surface 511 to the fourth side surface 514 of the sound generator 510 substantially simultaneously. Even in this case, the vibrations reaching the first side surface 511 to the fourth side surface 514 of the sound generator 510 can have substantially the same amplitude and phase.

[0198] Therefore, the display device 20, including the sound generator 510 and the display panel 2300 set according to the first distance d1 to the fourth distance d4, can improve the sound pressure level of the sound output from the display panel 2300. The display device 20 optimizes the constructive and destructive interference between multiple vibrations of the display panel 2300, thereby minimizing sound distortion to improve the bass reproduction band and enhance the sound pressure level.

[0199] For example, the ratio of the length of the first side surface 511 of the sound generator 510 to the length of the third side surface 513, which is substantially perpendicular to the first side surface 511, can be substantially equal to the ratio of the length of the first side surface of the display panel 2300 corresponding to the first side surface 511 of the sound generator 510 to the length of the third side surface, which is substantially perpendicular to the first side surface of the display panel 2300. Because the shape of the sound generator 510 is substantially the same as the shape of the display panel 2300, the distances between the first side surface 511 to the fourth side surface 514 of the sound generator 510 and the first side surface to the fourth side surface of the display panel 2300 can all be substantially equal. Therefore, since the distances from all side surfaces of the sound generator 510 to all side surfaces of the display panel 2300 are substantially equal, THD can be minimized, and the sound pressure level of the display device 20 can be improved.

[0200] The flexible film 2321 can be bent toward the lower surface of the display panel 2300 and attached to the display circuit board 2340. The display circuit board 2340 and the control circuit board 2360 can be disposed on the surface of the display panel 2300 and connected to each other via a cable 2350.

[0201] The sound generator 510 can be attached to the lower surface of the display panel 2300 via an adhesive component such as a pressure-sensitive adhesive. The sound generator 510 can be electrically connected to the control circuit board 2360 via a flexible circuit board 2352. The flexible circuit board 2352 can be a flexible printed circuit board or a flexible cable.

[0202] One side of the flexible circuit board 2352 may include a first pad and a second pad. The first pad of the flexible circuit board 2352 may be connected to the first electrode of the sound generator 510, and the second pad of the flexible circuit board 2352 may be connected to the second electrode of the sound generator 510.

[0203] The connection portion of the connector 2353 for connection to the control circuit board 2360 can be formed on the other side of the flexible circuit board 2352. The sound generator 510 can be connected to the connector 2353 of the control circuit board 2360 through the connection portion of the flexible circuit board 2352.

[0204] The timing control circuit 2371 and the sound driver 2372 can be mounted on the control circuit board 2360. Alternatively, the sound driver 2372 can be mounted on a system circuit board, power circuit board, or sound circuit board other than the control circuit board 2360. On the sound circuit board, only the sound driver 2372 can be installed without installing other integrated circuits.

[0205] The sound driver 2372 may include a digital signal processor (DSP) for digitally processing sound signals, a digital-to-analog converter (DAC) for converting digital signals output from the DSP into drive voltages as analog signals, and an amplifier (AMP) for amplifying the analog drive voltages output from the DAC and outputting the amplified analog drive voltages.

[0206] The sound driver 2372 can generate a sound signal including a first drive voltage and a second drive voltage for driving the sound generator 510 based on a stereo signal. The sound generator 510 can receive the sound signal including the first drive voltage and the second drive voltage from the sound driver 2372. The sound generator 510 can output sound by vibrating the display panel 2300 according to the first drive voltage and the second drive voltage.

[0207] The display panel 2300 may include a first substrate 2301, a second substrate 2302, a pixel array layer 2303, a cover window 2304, and a heat dissipation film 2305. The second substrate 2302 may face the surface of the first substrate 2301. The pixel array layer 2303 may be disposed between the first substrate 2301 and the second substrate 2302. Because the description of the pixel array layer 2303 can be found in... Figure 5 The description of pixel array layer 2303 is omitted to avoid redundancy, as it is found in the description. Cover window 2304 may be disposed on second substrate 2302 to protect the upper surface of display panel 2300.

[0208] A heat dissipation film 2305 may be disposed on the lower surface of the first substrate 2301. A sound generator 510 may be disposed on the lower surface of the heat dissipation film 2305 to dissipate heat generated by the sound generator 510. For example, the heat dissipation film 2305 may include a metal layer (such as graphite, silver (Ag), copper (Cu), or aluminum (Al)) having high thermal conductivity.

[0209] Figure 21 yes Figure 17 A bottom view of another exemplary embodiment of the display device. (Refer to...) Figure 21 The display device 21 may include a plurality of sound generators, each of which includes one or more side surfaces corresponding to a plurality of side surfaces of the display panel 2300. For example, the sound generators may include a first sound generator 520 and a second sound generator 530. The first sound generator 520 and the second sound generator 530 may be spaced apart from each other in a direction substantially parallel to the first and second side surfaces of the display panel 2300. Therefore, the first sound generator 520 and the second sound generator 530 may be spaced apart from each other in a first direction (X-axis direction).

[0210] The first sound generator 520 and the second sound generator 530 can be disposed on the lower surface of the display panel 2300. The first sound generator 520 and the second sound generator 530 can be electrically connected to the sound driver 2372 on the control circuit board 2360 via a flexible circuit board 2352, respectively. The first sound generator 520 and the second sound generator 530 can be attached to the lower surface of the display panel 2300 using an adhesive member such as a pressure-sensitive adhesive. Therefore, the first sound generator 520 and the second sound generator 530 can cause the display panel 2300 to vibrate by vibrating in the thickness direction (Z-axis direction) of the display panel 2300.

[0211] The display panel 2300 may include multiple side surfaces. For example, the display panel 2300 may include a first to a fourth side surface that are substantially perpendicular or substantially parallel to each other. The first side surface of the display panel 2300 may be the upper side surface of the display panel 2300 in a plan view, and the second side surface may be the lower side surface corresponding to the first side surface. The third side surface of the display panel 2300 may be the left side surface of the display panel 2300 in a plan view, and the fourth side surface may be the right side surface corresponding to the third side surface. The first and second side surfaces may be substantially perpendicular to the third and fourth side surfaces, respectively.

[0212] Each of the first sound generator 520 and the second sound generator 530 may include one or more side surfaces corresponding to the side surfaces of the display panel 2300, respectively. For example, the first sound generator 520 may include first side surfaces 521 to fourth side surfaces 524, and the second sound generator 530 may include first side surfaces 531 to fourth side surfaces 534. The first side surfaces 521 to third side surfaces 523 of the first sound generator 520 may correspond to the first to third side surfaces of the display panel 2300, respectively. The first side surfaces 531, second side surfaces 532, and fourth side surfaces 534 of the second sound generator 530 may correspond to the first, second, and fourth side surfaces of the display panel 2300, respectively.

[0213] The distances between the side surfaces of the display panel 2300 and the corresponding side surfaces of the first sound generator 520 and the second sound generator 530 relative to the side surfaces of the display panel 2300 can be substantially equal. For example, the first distance d1 between the first side surface 521 of the first sound generator 520 or the first side surface 531 of the second sound generator 530 and the first side surface of the display panel 2300 can be substantially equal to the second distance d2 (d1 = d2) between the second side surface 522 of the first sound generator 520 or the second side surface 532 of the second sound generator 530 and the second side surface of the display panel 2300. The third distance d3 between the third side surface 523 of the first sound generator 520 and the third side surface of the display panel 2300 can be substantially equal to the fourth distance d4 (d3 = d4) between the fourth side surface 534 of the second sound generator 530 and the fourth side surface of the display panel 2300. Furthermore, the first distance d1 and the second distance d2 can be substantially equal to the third distance d3 and the fourth distance d4, respectively (d1 = d2 = d3 = d4).

[0214] Because the first distance d1 to the fourth distance d4 are substantially equal, vibrations generated from the first side surface 521 to the third side surface 523 of the first sound generator 520 and vibrations generated from the first side surface 531, the second side surface 532, and the fourth side surface 534 of the second sound generator 530 can reach the first side surface to the fourth side surface of the display panel 2300 substantially simultaneously. In this case, the vibrations reaching the first side surface to the fourth side surface of the display panel 2300 can have substantially the same amplitude and phase. Furthermore, vibrations that return to the first sound generator 520 and the second sound generator 530 after reaching the first side surface to the fourth side surface of the display panel 2300 can reach the first sound generator 520 and the second sound generator 530 substantially simultaneously. Even in this case, the vibrations reaching the first sound generator 520 and the second sound generator 530 can have substantially the same amplitude and phase.

[0215] Therefore, the display device 21, including the first sound generator 520 and the second sound generator 530 set according to the first distance d1 to the fourth distance d4 and the display panel 2300, can improve the sound pressure level of the sound output from the display panel 2300. The display device 21 optimizes the constructive and destructive interference between multiple vibrations of the display panel 2300, thereby minimizing sound distortion to improve the bass reproduction band and enhance the sound pressure level.

[0216] For example, the display device 21 may include a sound generating region comprising a first sound generator 520 and a second sound generator 530, and a space between the first sound generator 520 and the second sound generator 530. The ratio of the length of the first side surface to the length of the third side surface of the sound generating region may be substantially equal to the ratio of the length of the first side surface to the length of the third side surface of the display panel 2300. Because the shape of the sound generating region is substantially the same as the shape of the display panel 2300, the distances between the multiple side surfaces of the sound generating region and the first to fourth side surfaces of the display panel 2300 may all be substantially equal. Therefore, because the distances from all side surfaces of the sound generating region to all side surfaces of the display panel 2300 are substantially equal, THD can be minimized and the sound pressure level of the display device 21 can be improved.

[0217] Each of the first distances d1 to the fourth distance d4 can be less than the fifth distance d5 between the first sound generator 520 and the second sound generator 530. For example, the fifth distance d5 between the first sound generator 520 and the second sound generator 530 can be greater than the first distance d1 (d5>d1) between the first side surface 521 of the first sound generator 520 or the first side surface 531 of the second sound generator 530 and the first side surface of the display panel 2300. The fifth distance d5 between the first sound generator 520 and the second sound generator 530 can be greater than the second distance d2 (d5>d2) between the second side surface 522 of the first sound generator 520 or the second side surface 532 of the second sound generator 530 and the second side surface of the display panel 2300. The fifth distance d5 between the first sound generator 520 and the second sound generator 530 can be greater than the third distance d3 (d5>d3) between the third side surface 523 of the first sound generator 520 and the third side surface of the display panel 2300. The fifth distance d5 between the first sound generator 520 and the second sound generator 530 can be greater than the fourth distance d4 between the fourth side surface 534 of the second sound generator 530 and the fourth side surface of the display panel 2300 (d5>d4). Because the first sound generator 520 and the second sound generator 530 are spaced apart from each other by a distance greater than the distance from the display panel 2300, vibration interference between the first sound generator 520 and the second sound generator 530 can be minimized. Therefore, the display device 21, which includes the first sound generator 520 and the second sound generator 530 spaced apart from each other by a fifth distance d5 greater than the first distance d1 to the fourth distance d4, can minimize sound distortion and increase the sound pressure level.

[0218] Figure 22 yes Figure 17 A bottom view of another exemplary embodiment of the display device. Figure 22 The display device 22 and Figure 19 The difference between the display device 20 and the sound generator 510 lies in the construction of the sound generator 510. Therefore, descriptions of components identical to those described above will be given briefly or omitted to avoid redundancy.

[0219] Reference Figure 22 The display device 22 may include a plurality of sound generators, each of which includes one or more side surfaces corresponding to a plurality of side surfaces of the display panel 2300. For example, the sound generators may include a first sound generator 540 to a fourth sound generator 570. The first sound generator 540 to the fourth sound generator 570 may correspond to a first corner 2310 to a fourth corner 2313 of the display panel 2300, respectively. The first sound generator 540 to the fourth sound generator 570 may be spaced apart from each other in a first direction (X-axis direction) or a second direction (Y-axis direction).

[0220] The first sound generator 540 to the fourth sound generator 570 can be disposed on the lower surface of the display panel 2300. The first sound generator 540 to the fourth sound generator 570 can be electrically connected to the sound driver 2372 on the control circuit board 2360 via a flexible circuit board 2352. The first sound generator 540 to the fourth sound generator 570 can be attached to the lower surface of the display panel 2300 using an adhesive member such as a pressure-sensitive adhesive. Therefore, the first sound generator 540 to the fourth sound generator 570 can vibrate the display panel 2300 by vibrating in the thickness direction (Z-axis direction) of the display panel 2300.

[0221] The display panel 2300 may include multiple side surfaces. For example, the display panel 2300 may include a first to a fourth side surface that are substantially perpendicular or substantially parallel to each other. The first side surface of the display panel 2300 may be the upper side surface of the display panel 2300 in a plan view, and the second side surface may be the lower side surface corresponding to the first side surface. The third side surface of the display panel 2300 may be the left side surface of the display panel 2300 in a plan view, and the fourth side surface may be the right side surface corresponding to the third side surface. The first and second side surfaces may be substantially perpendicular to the third and fourth side surfaces, respectively.

[0222] Each of the first sound generators 540 to the fourth sound generators 570 may include one or more side surfaces corresponding to side surfaces of the display panel 2300, respectively. For example, the first side surface of each of the first sound generator 540 and the second sound generator 550 may correspond to the first side surface of the display panel 2300. The second side surface of each of the third sound generator 560 and the fourth sound generator 570 may correspond to the second side surface of the display panel 2300. The third side surface of each of the first sound generator 540 and the third sound generator 560 may correspond to the third side surface of the display panel 2300. The fourth side surface of each of the second sound generator 550 and the fourth sound generator 570 may correspond to the fourth side surface of the display panel 2300.

[0223] The distances between the side surfaces of the display panel 2300 and the corresponding side surfaces of each of the first to fourth sound generators 540 and 570 can be substantially equal. For example, a first distance d1 between the first side surface of the first sound generator 540 or the first side surface of the second sound generator 550 and the first side surface of the display panel 2300 can be substantially equal to a second distance d2 (d1 = d2) between the second side surface of the third sound generator 560 or the second side surface of the fourth sound generator 570 and the second side surface of the display panel 2300. A third distance d3 between the third side surface of the first sound generator 540 or the third side surface of the third sound generator 560 and the third side surface of the display panel 2300 can be substantially equal to a fourth distance d4 (d3 = d4) between the fourth side surface of the second sound generator 550 or the fourth side surface of the fourth sound generator 570 and the fourth side surface of the display panel 2300. Furthermore, the first distance d1 and the second distance d2 can be substantially equal to the third distance d3 and the fourth distance d4, respectively (d1 = d2 = d3 = d4).

[0224] Because the first distance d1 to the fourth distance d4 are substantially equal, the vibrations generated from the first sound generator 540 to the fourth sound generator 570 can reach the first to fourth side surfaces of the display panel 2300 substantially simultaneously. In this case, the vibrations reaching the first to fourth side surfaces of the display panel 2300 can have substantially the same amplitude and phase. Furthermore, the vibrations that return to the first to fourth sound generators 540 to the fourth sound generator 570 after reaching the first to fourth side surfaces of the display panel 2300 can also reach the first to fourth sound generators 540 to the fourth sound generator 570 substantially simultaneously. Even in this case, the vibrations reaching the first to fourth sound generators 540 can have substantially the same amplitude and phase.

[0225] Therefore, the display device 22, including the first sound generator 540 to the fourth sound generator 570 set according to the first distance d1 to the fourth distance d4 and the display panel 2300, can improve the sound pressure level of the sound output from the display panel 2300. The display device 22 optimizes the constructive and destructive interference between multiple vibrations of the display panel 2300, thereby minimizing sound distortion to improve the bass reproduction band and enhance the sound pressure level.

[0226] For example, the display device 22 may include a sound generating region comprising first sound generators 540 to fourth sound generators 570 and the space between them. The ratio of the length of the first side surface to the length of the third side surface of the sound generating region may be substantially equal to the ratio of the length of the first side surface to the length of the third side surface of the display panel 2300. Because the shape of the sound generating region is substantially the same as that of the display panel 2300, the distances between the multiple side surfaces of the sound generating region and the first to fourth side surfaces of the display panel 2300 may all be substantially equal. Therefore, because the distances from all side surfaces of the sound generating region to all side surfaces of the display panel 2300 are substantially equal, THD can be minimized and the sound pressure level of the display device 22 can be improved.

[0227] Figure 23 yes Figure 17 A bottom view of another exemplary embodiment of the display device. Figure 23 The display device 23 and Figure 19 The difference between the display device 20 and the sound generator 510 lies in the construction of the sound generator 510. Therefore, descriptions of components identical to those described above will be given briefly or omitted to avoid redundancy.

[0228] Reference Figure 23 The display device 23 may include a first sound generator 580 having a plurality of side surfaces and a second sound generator 590 surrounding the first sound generator 580 and having a plurality of side surfaces corresponding to the plurality of side surfaces of the display panel 2300, respectively.

[0229] The second sound generator 590 may include first side surfaces 591 to fourth side surfaces 594 corresponding to the first to fourth side surfaces of the display panel 2300, respectively. The corresponding distances between the side surfaces of the second sound generator 590 and the corresponding side surfaces of the display panel 2300 can be substantially equal. For example, the first distance d1 between the first side surface 591 of the second sound generator 590 and the first side surface of the display panel 2300 can be substantially equal to the second distance d2 between the second side surface 592 of the second sound generator 590 and the second side surface of the display panel 2300 (d1 = d2). The third distance d3 between the third side surface 593 of the second sound generator 590 and the third side surface of the display panel 2300 can be substantially equal to the fourth distance d4 between the fourth side surface 594 of the second sound generator 590 and the fourth side surface of the display panel 2300 (d3 = d4). Furthermore, the first distance d1 and the second distance d2 can be substantially equal to the third distance d3 and the fourth distance d4, respectively (d1 = d2 = d3 = d4).

[0230] Because the first distance d1 to the fourth distance d4 are substantially equal, vibrations generated from the first side surface 591 to the fourth side surface 594 of the second sound generator 590 can reach the first side surface to the fourth side surface of the display panel 2300 substantially simultaneously. In this case, the vibrations reaching the first side surface to the fourth side surface of the display panel 2300 can have substantially the same amplitude and phase. Furthermore, vibrations that return to the second sound generator 590 after reaching the first side surface to the fourth side surface of the display panel 2300 can reach the first side surface 591 to the fourth side surface 594 of the second sound generator 590 substantially simultaneously. Even in this case, the vibrations reaching the first side surface 591 to the fourth side surface 594 of the second sound generator 590 can have substantially the same amplitude and phase.

[0231] Therefore, the display device 23, including the second sound generator 590 and the display panel 2300 set according to the first distance d1 to the fourth distance d4, can improve the sound pressure level of the sound output from the display panel 2300. The display device 23 optimizes the constructive and destructive interference between multiple vibrations of the display panel 2300, thereby minimizing sound distortion to improve the bass reproduction band and enhance the sound pressure level.

[0232] For example, the ratio of the length of the first side surface 591 of the second sound generator 590 to the length of the third side surface 593, which is substantially perpendicular to the first side surface 591, can be substantially equal to the ratio of the length of the first side surface of the display panel 2300 corresponding to the first side surface 591 of the second sound generator 590 to the length of the third side surface, which is substantially perpendicular to the first side surface of the display panel 2300. Because the shape of the second sound generator 590 is substantially the same as the shape of the display panel 2300, the distances between the first side surface 591 to the fourth side surface 594 of the second sound generator 590 and the first side surface to the fourth side surface of the display panel 2300 can all be substantially equal. Therefore, since the distances from all side surfaces of the second sound generator 590 to all side surfaces of the display panel 2300 are substantially equal, THD can be minimized, and the sound pressure level of the display device 23 can be increased.

[0233] For example, the first sound generator 580 may have a generally closed-loop shape in a plan view. The second sound generator 590 may also have a generally closed-loop shape, while surrounding the first sound generator 580 at a distance from it. The width d6 of the first sound generator 580 in a plan view may be substantially equal to the width d7 of the second sound generator 590 in a plan view. The first and second sound generators 580 may be driven independently to complement each other's vibrations. Therefore, the display device 23 including the first and second sound generators 580 can minimize THD and increase the sound pressure level of the display device 23.

[0234] Figure 24 This is a plan view of yet another exemplary embodiment of a display device constructed according to the principles of the invention. (Refer to...) Figure 24 The display device 30 includes a substrate 3110, a generally circular display portion 3120, a driving circuit portion 3130, a scan driver 3140, a driving power line 3150, and a cathode power line 3160.

[0235] The substrate 3110 may include a generally arcuate portion 3111 and a drive circuit connection portion 3113. For example, the substrate 3110 may be a flexible substrate or a plastic substrate. The generally arcuate portion 3111 may have a generally arcuate shape with a radius substantially the same as the center of the generally circular display portion 3120. The drive circuit connection portion 3113 may extend from one side of the generally arcuate portion 3111. The drive circuit connection portion 3113 may include a drive circuit portion 3130, a drive pad portion 3114, and multiple connecting lines. The drive circuit connection portion 3113 can be connected to a display driver via the drive pad portion 3114.

[0236] The substrate 3110 may also include a touch circuit connection portion 3115. The touch circuit connection portion 3115 may extend from the other side of the generally arcuate portion 3111. The touch circuit connection portion 3115 may be connected to the touch driver of the display device 30 via the touch pad portion 3116.

[0237] The substrate 3110 may be disposed on the support substrate 3100. The support substrate 3100 may be formed to have a shape substantially the same as that of the substrate 3110 to hold the substrate 3110, which is made of a generally flat flexible material. The support substrate 3100 may include a generally arcuate portion 3101 surrounding a generally arcuate portion 3111 of the substrate 3110.

[0238] A generally circular display portion 3120 may be configured in a generally circular shape on a generally arcuate portion 3111 of a base 3110. The generally circular display portion 3120 may have a radius smaller than the radius of the generally arcuate portion 3111 from its center. The generally circular display portion 3120 may include a display area DA and a dummy pixel area DMA surrounding the display area DA. The display area DA may include multiple pixels displaying an image. The dummy pixel area DMA may be disposed along the circumference of the display area DA to cover pixels formed in the outermost portion of the display area DA. The dummy pixel area DMA may include multiple dummy pixels.

[0239] The driving circuit section 3130 can drive the pixels formed in the display area DA of the generally circular display section 3120 using image data, control signals, and driving voltage supplied from the display driver via the driving pad section 3114. Therefore, the display area DA of the generally circular display section 3120 can be driven by the driving circuit section 3130 to display an image.

[0240] The scan driver 3140 may be formed in a generally arcuate shape along the circumference of the generally circular display portion 3120 and connected to multiple scan lines. The scan driver 3140 may generate scan pulses in response to a scan control signal supplied from the display driver via the drive pad portion 3114 and the scan control connection line. The scan driver 3140 may sequentially supply scan pulses to the scan lines. For example, the scan driver 3140 may be formed along the left or right circumference of the generally circular display portion 3120 and may supply scan pulses to one end or the other end of each of the scan lines.

[0241] The drive power line 3150 can supply pixel driving power to multiple pixel power lines. The drive power line 3150 can supply pixel driving power in the opposite direction to the direction in which data signals are supplied from the drive circuit section 3130 to the data lines. The drive power line 3150 can be connected to the respective lower ends of multiple pixel power lines based on the center of the display area DA via multiple drive power connection lines.

[0242] The drive power line 3150 can be divided into a circumferential line 3151, a first shoulder line 3153, and a second shoulder line 3155 based on its position on the substrate 3110. The circumferential line 3151 can be formed along the circumference of the generally circular display portion 3120, excluding the side of the generally circular display portion 3120 adjacent to the drive circuit connection portion 3113. The first shoulder line 3153 can be formed with a generally constant curvature between the end of the circumferential line 3151 adjacent to the drive circuit connection portion 3113 and the first drive power pad of the drive pad portion 3114. The first shoulder line 3153 can connect said end of the circumferential line 3151 to the first drive power pad.

[0243] The second shoulder line 3155 can be formed with a substantially constant curvature between the other end of the circumferential line 3151 adjacent to the drive circuit connection portion 3113 and the second drive power pad of the drive pad portion 3114. The second shoulder line 3155 can connect the other end of the circumferential line 3151 to the second drive power pad.

[0244] The cathode power line 3160 can be formed on the substrate 3110 along the circumference of the generally circular display portion 3120 between the drive power line 3150 and the generally circular display portion 3120, having a constant width and thickness. Both ends of the cathode power line 3160 can be connected to the cathode power pads of the drive pad portion 3114 formed in the drive circuit connection portion 3113. For example, the cathode power line 3160 can be formed generally parallel to the drive power line 3150, while having the same structure as the drive power line 3150.

[0245] Figure 25 yes Figure 24 A bottom view of another exemplary embodiment of the display device.

[0246] Reference Figure 25A sound generator 510 can be disposed on the lower surface of a support base 3100 to cause the support base 3100 and base 3110 to vibrate. The support base 3100 and base 3110 can serve as a vibrating plate. The sound generator 510 can be attached to the lower surface of the support base 3100 using an adhesive member such as a pressure-sensitive adhesive. For example, the sound generator 510 can be a piezoelectric element or piezoelectric actuator that vibrates the support base 3100 by using a piezoelectric material that contracts or expands according to an applied voltage. The sound generator 510 can have a generally curved surface. For example, the sound generator 510 can have a generally circular shape corresponding to a generally arcuate portion 3101 of the support base 3100 or a generally arcuate portion 3111 of the base 3110.

[0247] The sound generator 510 and the support base 3100 may have substantially the same center point CP. The sound generator 510 may include a generally circular side surface having a first radius r1. The generally arcuate portion 3101 of the support base 3100 may include a generally circular side surface having a second radius r2 greater than the first radius r1. A first distance d1 between a point on the side surface of the sound generator 510 and the generally arcuate portion 3101 of the support base 3100 may be substantially equal to a first distance d1 between another point on the side surface of the sound generator 510 and the generally arcuate portion 3101 of the support base 3100.

[0248] Because the distances between different portions of the side surface of the sound generator 510 and the approximately arcuate portion 3101 of the supporting base 3100 are substantially equal, vibrations generated from the sound generator 510 can reach the approximately arcuate portion 3101 of the supporting base 3100 substantially simultaneously. In this case, the vibrations reaching the approximately arcuate portion 3101 of the supporting base 3100 can have substantially the same amplitude and phase. Furthermore, vibrations returning to the sound generator 510 after reaching the approximately arcuate portion 3101 of the supporting base 3100 can reach different portions of the side surface of the sound generator 510 substantially simultaneously. Even in this case, the vibrations reaching different portions of the side surface of the sound generator 510 can have substantially the same amplitude and phase.

[0249] Therefore, the display device 30, which includes a sound generator 510 and a generally arcuate portion 3101 of a support base 3100 separated from each other at a substantially constant distance, can improve the sound pressure level of the sound output from the support base 3100 and the base 3110. The display device 30 optimizes the constructive and destructive interference between multiple vibrations of the support base 3100, thereby minimizing sound distortion to improve the bass reproduction band and enhance the sound pressure level.

[0250] Figure 26 yes Figure 24A bottom view of another exemplary embodiment of the display device.

[0251] Reference Figure 26 The display device 31 may include a support base 3100, a first sound generator 580, and a second sound generator 590. The support base 3100, the first sound generator 580, and the second sound generator 590 may have substantially the same center point CP. The second sound generator 590 may include a generally circular side surface having a first radius r1. The generally arcuate portion 3101 of the support base 3100 may include a generally circular side surface having a second radius r2 greater than the first radius r1. The first sound generator 580 may include a generally circular side surface having a third radius r3 less than the first radius r1. The second sound generator 590 may surround the first sound generator 580 at a distance from the first sound generator 580.

[0252] A first distance d1 between a point on the side surface of the second sound generator 590 and the generally arcuate portion 3101 of the support base 3100 can be substantially equal to a first distance d1 between another point on the side surface of the second sound generator 590 and the generally arcuate portion 3101 of the support base 3100.

[0253] Because the distances between different portions of the side surface of the second sound generator 590 and the generally arcuate portion 3101 of the supporting base 3100 are substantially equal, vibrations generated from the second sound generator 590 can reach the generally arcuate portion 3101 of the supporting base 3100 substantially simultaneously. In this case, the vibrations reaching the generally arcuate portion 3101 of the supporting base 3100 can have substantially the same amplitude and phase. Furthermore, vibrations returning to the second sound generator 590 after reaching the generally arcuate portion 3101 of the supporting base 3100 can reach different portions of the side surface of the second sound generator 590 substantially simultaneously. Even in this case, the vibrations reaching different portions of the side surface of the second sound generator 590 can have substantially the same amplitude and phase.

[0254] Therefore, the display device 31, which includes a second sound generator 590 separated from each other at a substantially constant distance and a generally arcuate portion 3101 of the support base 3100, can improve the sound pressure level of the sound output from the support base 3100 and the base 3110. The display device 31 optimizes the constructive and destructive interference between multiple vibrations of the support base 3100, thereby minimizing sound distortion to improve the bass reproduction band and enhance the sound pressure level.

[0255] For example, the first sound generator 580 may have a closed-loop shape in a plan view. The second sound generator 590 may also have a closed-loop shape, surrounding the first sound generator 580. The width d6 of the first sound generator 580 in a plan view may be substantially equal to the width d7 of the second sound generator 590 in a plan view. The first sound generator 580 and the second sound generator 590 may be driven independently to complement each other's vibrations. Therefore, the display device 31 including the first sound generator 580 and the second sound generator 590 can minimize THD and increase the sound pressure level of the display device 31.

[0256] In a display device constructed according to the principles and exemplary embodiments of the invention, the distances between the plurality of side surfaces of the sound generator and the plurality of side surfaces of the display panel corresponding to the side surfaces of the sound generator are substantially equal. Some advantages that can be achieved by exemplary embodiments of the invention and / or exemplary methods of the invention include optimizing constructive and destructive interference between the plurality of vibrations of the display panel and minimizing sound distortion to improve the bass reproduction band and enhance the sound pressure level.

[0257] Although certain exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Therefore, the inventive concept is not limited to such embodiments, but is limited to the broader scope of the appended claims and the various obvious modifications and equivalent arrangements that will be apparent to those skilled in the art.

Claims

1. A display device, the display device comprising: Display panel; displays images. as well as A sound generator is disposed on the surface of the display panel to cause the display panel to vibrate. The distance between each of the plurality of side surfaces of the sound generator and a corresponding side surface of the display panel that corresponds to the plurality of side surfaces of the sound generator is equal. The sound generator includes a vibrating layer, a first electrode, and a second electrode. The first electrode includes a first main electrode extending in a vertical direction and a first branch electrode branching from the first main electrode and extending in a horizontal direction. The second electrode is spaced apart from the first electrode in the horizontal direction and includes a second main electrode extending in the vertical direction and a second branch electrode branching from the second main electrode and extending in the horizontal direction. The first branch electrode and the second branch electrode are alternately arranged in the vertical direction, and the vibration layer is disposed between each pair of the first branch electrode and the second branch electrode.

2. The display device according to claim 1, wherein, The display panel includes a first side surface to a fourth side surface that are perpendicular or parallel to each other, and the sound generator includes a first side surface to a fourth side surface that correspond to the first side surface to the fourth side surface of the display panel, and the distance between each side surface of the first side surface to the fourth side surface of the sound generator and the corresponding side surface of the first side surface to the fourth side surface of the display panel is equal.

3. The display device according to claim 2, wherein, The ratio of the length of the first side surface of the display panel to the length of the third side surface of the display panel that is perpendicular to the first side surface of the display panel is equal to the ratio of the length of the first side surface of the sound generator corresponding to the first side surface of the display panel to the length of the third side surface of the sound generator corresponding to the third side surface of the display panel.

4. The display device according to claim 2, wherein, The sound generator includes: A first sound generator having multiple side surfaces; and A second sound generator surrounds the first sound generator. The distance between each of the first to fourth side surfaces of the second sound generator and the corresponding side surface of the display panel is equal.

5. A display device, the display device comprising: Display panel; displays images. as well as A sound generator is disposed on the surface of the display panel to cause the display panel to vibrate. The sound generator includes multiple sound generators, each of which includes one or more side surfaces corresponding to multiple side surfaces of the display panel. The distance between each of the multiple side surfaces of the display panel and at least some of the side surfaces of the sound generator corresponding to the multiple side surfaces of the display panel is equal. The plurality of side surfaces of the display panel include a first side surface to a fourth side surface. The sound generator includes a vibrating layer, a first electrode, and a second electrode. The first electrode includes a first main electrode extending in a vertical direction and a first branch electrode branching from the first main electrode and extending in a horizontal direction. The second electrode is spaced apart from the first electrode in the horizontal direction and includes a second main electrode extending in the vertical direction and a second branch electrode branching from the second main electrode and extending in the horizontal direction. The first branch electrode and the second branch electrode are alternately arranged in the vertical direction, and the vibration layer is disposed between each pair of the first branch electrode and the second branch electrode.

6. The display device according to claim 5, wherein, The sound generator includes a first sound generator and a second sound generator spaced apart from each other in a direction perpendicular to the first and second side surfaces of the display panel, and all the following distances are equal: a first distance between the first side surface of the first sound generator and the first side surface of the display panel; a second distance between the second side surface of the second sound generator and the second side surface of the display panel; a third distance between the third side surface of the first sound generator or the third side surface of the second sound generator and the third side surface of the display panel; and a fourth distance between the fourth side surface of the first sound generator or the fourth side surface of the second sound generator and the fourth side surface of the display panel. Wherein, each of the first distance to the fourth distance is less than the distance between the first sound generator and the second sound generator.

7. The display device according to claim 5, wherein, The sound generator includes a first sound generator and a second sound generator spaced apart from each other in a direction parallel to the first and second side surfaces of the display panel, and all of the following distances are equal: a first distance between the first side surface of the first sound generator or the first side surface of the second sound generator and the first side surface of the display panel; a second distance between the second side surface of the first sound generator or the second side surface of the second sound generator and the second side surface of the display panel; a third distance between the third side surface of the first sound generator and the third side surface of the display panel; and a fourth distance between the fourth side surface of the second sound generator and the fourth side surface of the display panel. Wherein, each of the first distance to the fourth distance is less than the distance between the first sound generator and the second sound generator.

8. The display device according to claim 5, wherein, The sound generator includes a first sound generator to a fourth sound generator, which are respectively adjacent to a first corner to a fourth corner of the display panel. The first distance between the first side surface of the first sound generator or the first side surface of the second sound generator and the first side surface of the display panel, the second distance between the second side surface of the third sound generator or the second side surface of the fourth sound generator and the second side surface of the display panel, the third distance between the third side surface of the first sound generator or the third side surface of the third sound generator and the third side surface of the display panel, and the fourth distance between the fourth side surface of the second sound generator or the fourth side surface of the fourth sound generator and the fourth side surface of the display panel are all equal.

9. A display device, the display device comprising: The display panel has a first side surface to a fourth side surface; as well as A sound generator is disposed on the surface of the display panel to cause the display panel to vibrate, and has first side surfaces to fourth side surfaces respectively corresponding to the first side surfaces to the fourth side surfaces of the display panel. The distance between each of the first, third, and fourth side surfaces of the sound generator and the corresponding side surface of the first, third, and fourth side surfaces of the display panel is equal. The sound generator has a longitudinal axis parallel to the fourth or third side surface of the display panel, and the distance between each of the first, third, and fourth side surfaces of the sound generator and a corresponding side surface of the first, third, and fourth side surfaces of the display panel is less than the distance between the second side surface of the sound generator and the second side surface of the display panel. The sound generator includes a vibrating layer, a first electrode, and a second electrode. The first electrode includes a first main electrode extending in a vertical direction and a first branch electrode branching from the first main electrode and extending in a horizontal direction. The second electrode is spaced apart from the first electrode in the horizontal direction and includes a second main electrode extending in the vertical direction and a second branch electrode branching from the second main electrode and extending in the horizontal direction. The first branch electrode and the second branch electrode are alternately arranged in the vertical direction, and the vibration layer is disposed between each pair of the first branch electrode and the second branch electrode.

10. A display device, the display device comprising: The substrate has a first generally curved surface; as well as A sound generator, disposed on the surface of the substrate to cause the substrate to vibrate, the sound generator having a second generally curved surface. In this embodiment, each of the plurality of portions of the second generally curved surface is equidistant from a corresponding portion of the plurality of portions of the first generally curved surface that correspond to the plurality of portions of the second generally curved surface. The base includes a generally arcuate portion having at least one generally arcuate arc and a protruding portion extending from one side of the generally arcuate portion. The display device further includes a generally circular display portion disposed on the generally arcuate portion. The sound generator has a roughly circular shape corresponding to the roughly circular display portion, and shares the same center point as the roughly circular display portion. The sound generator includes a vibrating layer, a first electrode, and a second electrode. The first electrode includes a first main electrode extending in a vertical direction and a first branch electrode branching from the first main electrode and extending in a horizontal direction. The second electrode is spaced apart from the first electrode in the horizontal direction and includes a second main electrode extending in the vertical direction and a second branch electrode branching from the second main electrode and extending in the horizontal direction. The first branch electrode and the second branch electrode are alternately arranged in the vertical direction, and the vibration layer is disposed between each pair of the first branch electrode and the second branch electrode.

Images