KR102827445B1 - Display apparatus having exiter - Google Patents

Abstract

A display device according to an embodiment of the present specification includes a display panel, a first support member, a second support member, a vibration device, and a pad. The display panel displays an image. The first support member is disposed on the rear surface of the display panel and includes at least one heat dissipation hole. The second support member is disposed on the rear surface of the first support member and includes at least one ventilation hole. The vibration device has one end attached to the rear surface of the display panel and the other end fixed to the second support member. The pad is attached to the rear surface of the display panel and is disposed on the first support member in correspondence with the heat dissipation hole.

Description

DISPLAY APPARATUS HAVING EXITER

The present specification relates to a display device having a vibration device. In particular, the present specification relates to a display device having a vibration device mounted on the rear side of a display panel.

Display devices display images on a display panel, and separate speakers must be installed to provide sound. When speakers are placed on a display device, the speaker takes up space, which causes problems in the design and spatial arrangement of the display device.

Since the sound output from the speaker is provided from the rear or bottom of the display device, there is a problem of poor sound quality due to interference with sound reflected from the wall or ground. Therefore, there is a problem of difficulty in accurate sound transmission and a decrease in the immersion of the viewer or user.

Accordingly, the inventor of the present specification recognized the problems mentioned above and conducted several experiments to implement a display device having a vibration device capable of improving sound quality and having reliability. Through several experiments, a display device having a vibration device of a new structure capable of improving sound quality and improving reliability was invented.

The problem solved by the embodiment of the present specification is to provide a display device including a vibration device that is arranged on the rear side of a display module and can vibrate the display module to generate sound, and has improved sound pressure characteristics.

The problem solved by the embodiment of the present specification is to provide a display device including a structure that radiates heat generated in a vibration device.

The problems solved by the embodiments of this specification are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

A display device according to an embodiment of the present specification includes a display panel, a first support member, a second support member, a vibration device, and a pad. The display panel displays an image. The first support member is disposed on the rear surface of the display panel and includes at least one heat dissipation hole. The second support member is disposed on the rear surface of the first support member and includes at least one ventilation hole. The vibration device has one end attached to the rear surface of the display panel and the other end fixed to the second support member. The pad is attached to the rear surface of the display panel and is disposed on the first support member in correspondence with the heat dissipation hole.

Specific details of other embodiments are included in the detailed description and drawings.

A display device according to an embodiment of the present specification can generate sound by configuring a vibration device or an acoustic vibrator that vibrates a display module so that sound provided by the display device is transmitted to the front of the display module.

A display device according to an embodiment of the present specification can provide a display device capable of lowering the temperature of a display module and improving the temperature uniformity of the display module by configuring a support member including an air inlet and/or a vent.

The display device according to the embodiment of the present specification is characterized by configuring pads arranged corresponding to the inlet and/or the vent on the rear side of the display panel. Accordingly, by sequentially closing or opening the inlet as the vibration device operates, the flow of air for heat dissipation can be facilitated, thereby maximizing the heat dissipation effect.

The effects of this specification are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

Since the content of the invention described above, which includes the problem to be solved, the means for solving the problem, and the effect thereof, does not specify the essential features of the claim, the scope of the rights of the claim is not limited by the matters described in the content of the invention.

Figure 1 is a drawing showing a display device according to an embodiment of the present specification.
Figure 2 is an enlarged cross-sectional view showing in detail the structure of a vibration device according to an example of the present specification.
FIG. 3 is a plan view showing a display device according to the first embodiment of the present specification.
FIG. 4 is a cross-sectional view showing the structure of a display device according to the first embodiment, taken along the cutting line I-I' shown in FIG. 3.
FIG. 5 is a perspective view showing the structure of a pad provided in a display device according to the first embodiment of the present specification.
FIGS. 6A and 6B are cross-sectional views illustrating changes in the internal structure of a display device according to the first embodiment due to the operation of a vibration device.
Figure 7 is a plan view showing a display device according to the second embodiment of the present specification.
FIG. 8 is a cross-sectional view showing the structure of a display device according to the second embodiment, taken along the cutting line II-II' shown in FIG. 7.
Figure 9 is a plan view showing a display device according to the third embodiment of the present specification.
Fig. 10 is a perspective view showing the structure of a pad provided in a display device according to the fourth embodiment of the present specification.

The advantages and features of the present disclosure, and the methods for achieving them, will become clearer with reference to the embodiments described below in detail with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but may be implemented in various different forms. The embodiments below are provided only to make the disclosure of the present disclosure complete and to inform those skilled in the art of the scope of the invention. The present disclosure should be defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present specification are illustrative and are not limited to the matters illustrated in the present specification. The same reference numerals may refer to the same components throughout the specification. In addition, in describing the present specification, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present specification, the detailed description will be omitted. When “includes,” “has,” “consists of,” etc. are used in the present specification, other components may be added unless “only” is used. When a component is expressed in the singular, it includes a case where the plural is included unless there is a specifically explicit description.

When interpreting a component, it is interpreted as including the error range even if there is no separate explicit description of the error range.

When describing a positional relationship, for example, when the positional relationship between two parts is described as "on ~," "above ~," "below ~," "next to ~," etc., one or more other components may be located between the two parts, unless, for example, "right" or "directly" is used.

When describing a temporal relationship, if the temporal continuity is described as "after ~," "following ~," "next to ~," or "before ~," it can also include cases where it is not continuous, as long as "right away" or "directly" is not used.

Although the terms first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Thus, a first component referred to below may also be a second component within the technical scope of this specification.

In describing components of this specification, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by these terms. When it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but that other components may also be "interposed" between each component that is indirectly connected or connected without any specifically explicit description.

"At least one" should be understood to include any combination of one or more of the associated components. For example, "at least one of the first, second, and third components" could mean not only the first, second, or third components, but also any combination of two or more of the first, second, and third components.

In this specification, the "display device" may include a display device such as a liquid crystal module (LCM) and an organic light emitting display module (OLED Module) including a display panel and a driving unit for driving the display panel. In addition, it may include a set electronic apparatus or a set device (or set apparatus) such as a notebook computer, a television, a computer monitor, an automotive apparatus, or other forms of a vehicle, which are complete products (or final products) including an LCM, an OLED module, etc., an equipment apparatus, a mobile electronic apparatus such as a smart phone or an electronic pad, etc.

Therefore, in this specification, the display device may include the display device itself, such as an LCM, an OLED module, etc., and an application product including the LCM, an OLED module, etc., or a set device that is a final device for carrying out the display.

And in some examples, an LCM, OLED module composed of a display panel and a driver, etc. may be expressed as a "display device," and an electronic device as a finished product including an LCM, OLED module may be expressed as a "set device." For example, a display device may include a display panel of a liquid crystal display (LCD) or an organic light emitting diode (OLED), and a source PCB which is a control unit for driving the display panel. A set device may further include a set PCB which is a set control unit that is electrically connected to the source PCB and drives the entire set device.

The display panel used in the embodiments of the present specification may be any type of display panel, such as a liquid crystal display panel, an organic light emitting diode (OLED) display panel, and an electroluminescent display panel, and the embodiments are not limited thereto. For example, the display panel may be a display panel that can generate sound by vibrating by a vibration generating device or a vibration device according to the embodiments of the present specification. The display panel applied to the display device according to the embodiments of the present specification is not limited to the shape or size of the display panel.

For example, when the display panel is a liquid crystal display panel, it may include a plurality of gate lines, data lines, and pixels formed at intersections of the gate lines and data lines. In addition, it may be configured to include an array substrate including a thin film transistor, which is a switching element for controlling light transmittance in each pixel, an upper substrate having a color filter and/or a black matrix, and a liquid crystal layer formed between the array substrate and the upper substrate.

When the display panel is an organic electroluminescent (OLED) display panel, it may include a plurality of gate lines, data lines, and pixels formed at intersections of the gate lines and the data lines. In addition, it may be configured to include an array substrate including a thin film transistor, which is an element for selectively applying voltage to each pixel, an organic light emitting element (OLED) layer on the array substrate, and an encapsulation substrate or encapsulation substrate disposed on the array substrate to cover the organic light emitting element layer. The encapsulation substrate can protect the thin film transistor and the organic light emitting element layer from external impact, and prevent moisture or oxygen from penetrating into the organic light emitting element layer. In addition, the layer formed on the array substrate may include an inorganic light emitting layer, for example, a nano-sized material layer and a quantum dot light emitting layer. Another example may include a micro light emitting diode.

The display panel may further include a backing element or rear element, such as a metal plate, attached to the display panel. Other structures, for example, other structures made of other materials, may also be included.

In this specification, the vibration device or the display device including the vibration device can be applied to a vehicle as a user interface module, such as a central control panel in an automobile. For example, the display panel can be implemented between the occupants of the two front seats so that the vibration of the display panel is transmitted toward the interior of the vehicle. Accordingly, the audio experience in the vehicle can be improved compared to a structure having speakers only on the interior sides of the vehicle.

The individual features of the various embodiments of the present specification may be partially or wholly combined or combined with each other, and may be technically interconnected and operated in various ways, and the individual embodiments may be implemented independently of each other or implemented together in a related relationship.

Hereinafter, embodiments of the present specification will be described with reference to the attached drawings. The scale of components illustrated in the drawings may have a different scale from the actual scale for convenience of explanation, and is not limited to the scale illustrated in the drawings.

FIG. 1 is a perspective view showing a display device according to an embodiment of the present specification. Referring to FIG. 1, a display device according to an embodiment of the present specification may include a display module (100), a support member (300), and one or more vibration devices (500). In the following description, for convenience, only one vibration device (500) is illustrated, but it is not limited thereto, and two or more may be arranged.

The display module (100) can vibrate according to the driving of at least one vibration device (500) while displaying an image and output sound (PVS) (or panel vibration sound) toward the front (or forward) (FD). Alternatively, the display module (100) can vibrate according to the driving of at least one vibration device (500) while not displaying an image and output sound (PVS) toward the front (FD). The display module (100) according to the present specification can perform display of an image and generation (or output) of sound (PVS) simultaneously or individually.

A display module (100) according to an embodiment of the present specification may include a display panel (110) that displays an image. For example, the image may include an electronic image or a digital image. The display panel (110) may display an image by outputting light. The display panel (110) may be any type of display panel or curved display panel, such as a liquid crystal display panel, an organic light emitting display panel, a quantum dot light emitting display panel, a micro light emitting diode display panel, and an electrophoretic display panel. The display panel (110) may be a flexible display panel. For example, the display panel (110) may be a flexible light emitting display panel, a flexible electrophoretic display panel, a flexible electrowetting display panel, a flexible micro light emitting diode display panel, or a flexible quantum dot light emitting display panel.

The display panel (110) vibrates according to the vibration of the vibration device (500) and directly outputs sound (PVS) to the front (FD), and thus, the display panel (110) may be a vibration plate or speaker that directly generates sound (PVS). For example, when the display module (100) generates sound (PVS), the display module (100) may be a vibration plate, a panel speaker, or a flat speaker that directly generates sound (PVS).

The display panel (110) may include a pixel circuit arranged on a substrate (or base substrate), and a pixel array layer (or display portion) connected to the pixel circuit and having an anode electrode, a cathode electrode, and a light-emitting layer. The anode electrode may be a first electrode or a pixel electrode, and is not limited to the term. The cathode electrode may be a second electrode or a common electrode, and is not limited to the term. The display panel (110) may display an image in a top emission method, a bottom emission method, or a dual emission method depending on the structure of the pixel array layer. The top emission method may display an image by emitting visible light generated from the pixel array layer toward the substrate of the display panel (110), and the bottom emission method may display an image by emitting visible light generated from the pixel array layer in the opposite direction of the substrate.

The display panel (110) may include a pixel array portion arranged in a pixel area configured by a plurality of gate lines and/or a plurality of data lines. The pixel array portion may include a plurality of pixels that display an image according to signals supplied to signal lines. The signal lines may include gate lines, data lines, and pixel driving power lines. For example, signals may be supplied to the gate lines, data, and pixel driving power lines under the control of a timing controller.

Each of the plurality of pixels may include a pixel circuit layer including a driving thin film transistor provided in a pixel area, an anode electrode electrically connected to the driving thin film transistor, a light-emitting layer formed on the anode electrode, and a cathode electrode electrically connected to the light-emitting layer.

The driving thin film transistor may be configured in a transistor area of each pixel area disposed on the substrate. The driving thin film transistor may include a gate electrode, a gate insulating film, a semiconductor layer, a source electrode, and a drain electrode. The semiconductor layer of the thin film transistor may include silicon such as a-Si, poly-Si, or low-temperature poly-Si, or an oxide such as IGZO (Indium-Gallium-Zinc-Oxide), but is not limited thereto.

The anode electrode is provided in the aperture area (or light-emitting area) arranged in each pixel area and can be electrically connected to the driving thin film transistor.

For example, the light-emitting layer may be formed on the anode electrode to form an organic light-emitting element. The organic light-emitting element may be implemented to emit light of the same color, for example, white, for each pixel, or may be implemented to emit light of different colors, for example, one or more of red, green, and blue, for each pixel.

As another example, the light-emitting layer may be electrically connected to each of the anode electrode and the cathode electrode, thereby forming a micro light-emitting diode element. The micro light-emitting diode element is a light-emitting diode implemented in the form of an integrated circuit (IC) or a chip, and may include a first terminal electrically connected to the anode electrode and a second terminal electrically connected to the cathode electrode. The cathode electrode may be commonly connected to the light-emitting element of the light-emitting layer provided in each pixel area.

The encapsulation portion is formed on the substrate to surround the pixel array portion, thereby preventing oxygen or moisture from penetrating into the light-emitting layer of the pixel array portion. The encapsulation portion by way of example may be formed as a multi-layer structure in which organic material layers and inorganic material layers are alternately laminated, but is not limited thereto. The inorganic material layer may block oxygen or moisture from penetrating into the light-emitting element layer of the pixel array portion. The organic material layer may be formed to a relatively thicker thickness than the inorganic material layer so as to cover foreign substances (particles) that may be generated during the manufacturing process. For example, the encapsulation portion may include a first inorganic film, an organic film on the first inorganic film, and a second inorganic film on the organic film. The organic film may be a foreign substance cover layer.

In addition, the display panel (110) may be a liquid crystal display panel including an upper substrate, a lower substrate, and a liquid crystal layer. The upper substrate may be a first substrate or a thin film transistor array substrate, and may include a pixel array (or a display portion or a display area) having a plurality of pixels formed in a pixel area intersected by a plurality of gate lines and/or a plurality of data lines. Each of the plurality of pixels may include a thin film transistor connected to the gate lines and/or the data lines, a pixel electrode connected to the thin film transistor, and a common electrode formed adjacent to the pixel electrode and supplied with a common voltage.

The upper substrate may further include a pad portion provided on a first edge (or non-display portion), and a gate driving circuit provided on a second edge (or second non-display portion).

The pad section can supply signals supplied from the outside to the pixel array and/or the gate driving circuit. For example, the pad section can include a plurality of data pads connected to a plurality of data lines via a plurality of data link lines, and/or a plurality of gate input pads connected to the gate driving circuit via a gate control signal line. The size of the upper substrate can be larger than that of the lower substrate, but is not limited thereto.

The gate driving circuit may be built (or integrated) into the second edge of the upper substrate so as to be connected to a plurality of gate lines. For example, the gate driving circuit may be implemented as a shift register including a transistor formed by the same process as a thin film transistor provided in the pixel area. The gate driving circuit according to another example may be implemented in the form of an integrated circuit without being built into the upper substrate and may be included in the panel driving circuit. The gate driving circuit may supply a signal to the gate line under the control of the timing controller. The data voltage or the common voltage may supply a signal to the data line or the common line under the control of the timing controller.

The lower substrate may be a second substrate or a color filter array substrate, and may include a pixel pattern that may include an aperture region that overlaps a pixel region formed on the upper substrate, and a color filter layer formed in the aperture region. The lower substrate may have a smaller size than the upper substrate, but is not limited thereto. For example, the lower substrate may overlap with the remaining portion of the upper substrate except for a first edge. The lower substrate may be bonded to the remaining portion of the upper substrate except for the first edge with a liquid crystal layer interposed therebetween by a sealant.

The liquid crystal layer is interposed between the upper substrate and the lower substrate, and can be made of liquid crystals in which the arrangement direction of liquid crystal molecules changes depending on the electric field formed by the data voltage and the common voltage applied to the pixel electrode for each pixel.

The lower polarizing member is attached to the lower surface of the lower substrate and can polarize light incident from the backlight and traveling to the liquid crystal layer. The upper polarizing member is attached to the upper surface of the upper substrate and can polarize light transmitted through the upper substrate and emitted to the outside.

Accordingly, the liquid crystal display panel can display an image according to light passing through the liquid crystal layer by driving the liquid crystal layer according to the electric field formed for each pixel by the data voltage applied to each pixel and the common voltage.

The liquid crystal display panel may have an upper substrate made of a color filter array substrate and a lower substrate made of a thin film transistor array substrate. As another example, the liquid crystal display panel may have an upside-down inverted shape. In this case, the pad portion of the liquid crystal display panel may be covered by a separate mechanism.

The display panel (110) according to the embodiment of the present specification may include a bending portion that is bent or curved to have a curved shape or a constant radius of curvature.

The bending portion of the display panel (110) may be implemented on at least one of one edge portion and the other edge portion that are parallel to each other in the display panel (110). The one edge and/or the other edge of the display panel (110) implementing the bending portion may include only a non-display area, or may include an edge of the display area and the non-display area. Here, the display panel (110) including the bending portion implemented by bending the non-display area may have a one-sided bezel bending structure or a two-sided bezel bending structure. In addition, the display panel (110) including the bending portion implemented by bending the edge of the display area and the non-display area may have a one-sided active bending structure or a two-sided active bending structure.

The display module (100) according to the embodiment of the present specification may further include a functional film (130) disposed on the display panel (110).

The functional film (130) can be attached to the display panel (110) via a transparent adhesive member. The transparent adhesive member can include, but is not limited to, a pressure sensitive adhesive (PSA), an optical clear adhesive (OCA), or an optical clear resin (OCR).

The functional film (130) may include an anti-reflection layer (or anti-reflection film) to prevent reflection of external light and improve outdoor visibility and contrast ratio of an image displayed on the display panel (110). For example, the anti-reflection layer may include a circularly polarizing layer (or circularly polarizing film) that blocks reflected light reflected by thin film transistors and/or lines arranged in the pixel array layer of the display panel (110) from traveling to the outside.

The functional film (130) may further include an optical path control layer (or optical path control film) that controls the path of light emitted from the pixel array layer of the display panel (110) to the outside. The optical path control layer may include a structure in which high-refractive-index layers and low-refractive-index layers are alternately laminated, thereby changing the path of light incident from the pixel array layer and minimizing the color shift phenomenon due to the viewing angle. In this case, the low-refractive-index layer may be disposed on the uppermost layer of the optical path control layer, but is not limited thereto.

The display module (100) may further include a touch electrode portion for a user interface using a user touch. The touch electrode portion may be interposed between the display panel (110) and the functional film (130) or may be built into the display panel (110) according to an in-cell touch method. For example, the touch electrode portion according to the in-cell touch method may include touch electrodes of a mutual electrostatic capacitance method or touch electrodes of a self electrostatic capacitance method.

The display device according to the embodiment of the present specification may further include a support member (not shown). The support member may be arranged at the rear of the display module (100). For example, the support member may support or fix the vibration device (500).

The supporting member may be expressed as a Cover Bottom, a Plate Bottom, a Back Cover, a Set Cover, a Back Cover, a Rear Surface Frame, a Base Frame, a Metal Frame, a Metal Chassis, a Chassis Base, a Chassis, or an m-Chassis, etc. Accordingly, the supporting member (300) may be implemented as any form of a frame or plate-shaped structure arranged on the rear surface of the display module (100). The rear surface of the display module (100) may be expressed as one side, a first side, a back surface, a lower surface, etc., and is not limited to the terminology.

The supporting member may be made of a glass material, a metal material, or a plastic material. For example, the supporting member made of a glass material may have one or more of sapphire glass and gorilla glass, or a laminated structure (or a bonded structure) thereof. As another example, the supporting member made of a metal material may have one or more of aluminum, an aluminum alloy, a magnesium alloy, an alloy of iron and nickel, and stainless steel, an alloy material thereof, or a bonded structure thereof.

One or more vibration devices (500) can generate sound (PVS) using the display module (100), for example, the display panel (110), as a vibrating plate. The display device according to some embodiments of the present specification can include one or more vibration devices (500) arranged at the rear center (or central region) of the display module (100). For example, the one or more vibration devices (500) can vibrate the rear center of the display module (100) to generate sound (PVS) due to the vibration of the display module (100) in the forward direction (FD) of the display device.

The display device may further include a middle frame (700). The middle frame (700) may be arranged between the rear edge of the display module (100) and the front edge of the support member. The middle frame (700) may support edges of each of the display module (100) and the support member. The middle frame (700) may surround at least one side surface of each of the display module (100) and the support member. The middle frame (700) may provide a gap space (not shown) between the display module (100) and the support member. The gap space may be expressed as an air gap, a vibration space, a vibration device arrangement space, etc., and is not limited to the terminology.

The middle frame (700) may be made of a metal material or a plastic material. For example, the middle frame (700) may be made of a metal material to improve the side appearance design of the display device and to protect the side of the display device.

The display device according to the embodiment of the present specification can output sound (PVS) to the front (FD) according to the vibration of the display module (100), for example, the display panel (110), by one or more vibration devices (500) arranged between the display module (100) and the support member, thereby improving the immersion of a viewer watching an image of the display device. In addition, since the sound (PVS) is generated by the vibration of the display panel (110), a separate speaker does not need to be configured, and thus the degree of freedom in the design of the set device and the arrangement of the speakers can be improved.

Hereinafter, with reference to FIG. 2, the structure of a vibration device (500) according to an example of the present specification will be described in detail. The vibration device (500) described below is only an example and is not limited thereto. FIG. 2 is an enlarged cross-sectional view showing in detail the structure of a vibration device according to an example of the present specification.

Referring to FIG. 2, the vibrating device (500) may include a bobbin (1650) around a magnet (1620), and a coil (1660) around the bobbin (1650).

For example, the magnet (1620) may be placed on the plate (1610). The magnet (1620) may use a sintered magnet such as barium ferrite, and may include one or more of iron trioxide (Fe ₂ O ₃ ), barium witherite (BaCO ₃ ), neodymium (Nd), strontium ferrite (Fe ₁₂ O ₁₉ Sr) with improved magnetic properties, aluminum (Al), nickel (Ni), cobalt (Co) alloy cast magnets, and the like. For example, the neodymium magnet may be neodymium-iron-boron (Nd-Fe-B), and the like. The plate (1610) may be a yoke, and is not limited to the term. The plate (1610) may include a protrusion (1610') surrounding a magnet (1620), a bobbin (1650), and a coil (1660).

A center pole (1630) may be placed on the magnet (1620). For example, the center pole (1630) may be referred to as a pole piece. As another example, more pole pieces may be placed on the center pole (1630).

The bobbin (1650) can surround the magnet (1620). For example, the bobbin (1650) can be disposed on the plate (1610). The bobbin (1650) can have an ellipse or oval shape. The oval shape can include an elliptical shape, a rectangular shape with rounded corners, or a non-circular curved shape having a width different from its height. For example, in the elliptical bobbin (1650), the ratio of the major axis diameter to the minor axis diameter can be configured to be 1.3:1 to 2:1. The elliptical bobbin (1650) can improve high-frequency sound compared to the circular bobbin, and can have excellent heat dissipation characteristics because it can generate less heat due to vibration.

The coil (1660) is wound to surround the outer surface of the bobbin (1650) and can receive an external current for sound generation (or voice current). For example, the coil (1660) can be raised and lowered together with the bobbin (1650). The coil (1660) can be expressed as a voice coil, etc. When current is applied to the coil (1660), the entire bobbin (1650) moves up and down according to Fleming's left-hand rule based on the applied magnetic field formed around the coil (1660) and the external magnetic field formed around the magnet (1620). Sound (PVS) or sound waves are generated by the vibration of the display module (100) due to the up and down movement (or vibration) of the bobbin (1650).

Since the bobbin (1650) vibrates up and down, a lopsided vibration occurs due to the up and down vibration, and the lopsided vibration of the bobbin (1650) can be affected by the weight of the bobbin (1650), and the weight of the bobbin (1650) is affected by the weight of the coil (1660). Accordingly, when the weight of the coil (1660) is reduced, the lopsided vibration of the bobbin (1650) can be reduced. Therefore, when considering the heat transferred to the bobbin (1650) and the lopsided vibration of the bobbin (1650), the coil (1660) can be made of aluminum, which has a higher thermal conductivity than copper, a material of general coils, and thus has relatively superior heat dissipation characteristics, while being relatively lighter than copper.

Aluminum may form an oxide film in the air, making soldering difficult during the manufacture of the vibration device (500). Therefore, the coil (1660) may include an aluminum layer (or a first metal layer) for heat dissipation, and a metal outer layer (or a second metal layer) surrounding the aluminum layer. In this case, the metal outer layer may include one material among copper (Cu), silver (Ag), and gold (Au). For example, the coil (1660) may be aluminum covered with copper (copper clad aluminum wire). Since the metal outer layer is formed in a thin film form on the outside of the first metal layer, it may not have a significant effect on the weight increase of the coil (1660). As a result, the weight of the coil (1660) may be reduced by approximately 60% compared to a case where the coil (1660) is made of only copper material or copper wire.

The bobbin (1650) may be a structure formed of a material processed from pulp or paper, aluminum or magnesium or an alloy thereof, a synthetic resin such as polyimide, etc. For example, the bobbin (1650) may be implemented with a polyimide film that has relatively excellent heat dissipation properties and is relatively light in order to prevent local image quality degradation of the display panel (110) due to heat generated from the coil (1660).

내지 영상 400

까지 광범위한 온도 범위에서 물성이 변하지 않고, 내열성, 전기절연성, 유연성, 및 불연성 등의 특징을 가지고 있다. 폴리이미드 필름은 열적 및 기계적 강도가 우수하여 보빈(1650)의 신뢰성을 향상시킬 수 있으며, 우수한 방열 특성으로 인하여 보빈(1650)의 진동에 의한 열의 발생을 줄일 수 있는 효과가 있다. 예를 들면, 폴리이미드 필름은 KAPTON일 수 있으며, 파이로멜리틱 디안하이드라이드(pyromellitec dianhydride)와 4,4'-옥시디아닐린(4,4'-oxydianiline)의 축합일 수 있다.Polyimide film is minus 270

Internal video 400

It has the characteristics of heat resistance, electrical insulation, flexibility, and non-flammability, etc., and its properties do not change over a wide temperature range. The polyimide film has excellent thermal and mechanical strength, so that it can improve the reliability of the bobbin (1650), and has the effect of reducing heat generation due to vibration of the bobbin (1650) due to its excellent heat dissipation characteristics. For example, the polyimide film can be KAPTON, and can be a condensation of pyromellitic dianhydride and 4,4'-oxydianiline.

The center pole (1630) may be accommodated or inserted into the bobbin (1650) to guide the elevation of the bobbin (1650). For example, the center pole (1630) may be accommodated or inserted into the interior of the bobbin (1650), so that the outer circumference of the center pole (1630) may be surrounded by the bobbin (1650). The center pole (1630) may be expressed as an elevation guide or pole pieces, and is not limited to the terms.

The frame (1640) may be arranged on the outer side of the plate (1610) or the protrusion (1610'). The damper (1670) may be arranged between the frame (1640) and the bobbin (1650). For example, the frame (1640) may be formed at a predetermined height on the edge of the plate (1610) so as to have the same shape as the bobbin (1650). As another example, the frame (1640) may include a hollow portion formed at a predetermined height on the front edge of the plate (1610) and having the same shape as the bobbin (1650).

The damper (1670) may be connected between the frame (1640) and the vibration device. For example, the damper (1670) may be connected between the frame (1640) and the bobbin (1650). The damper (1670) may be expressed by other terms such as a spider, a suspension, or an edge, and is not limited to these terms.

One end of the damper (1670) may be connected to the frame (1640), and the other end of the damper (1670) may be connected to the upper outer surface of the bobbin (1650). The damper (1670) may have a wrinkled structure between one end and the other end, and may contract and relax according to the up-and-down movement of the bobbin (1650), thereby controlling the vibration of the bobbin (1650). The damper (1670) is connected between the bobbin (1650) and the frame (1640), thereby limiting the vibration distance of the bobbin (1650) through a restoring force. For example, when the bobbin (1650) vibrates more than a certain distance or less than a certain distance, the bobbin (1650) may return to its original position by the restoring force of the damper (1670).

In addition, the vibration device (500) according to the present specification may further include a bobbin ring (1652). The bobbin ring (1652) may be placed on the front (or the tip) of the bobbin (1650). The bobbin ring (1652) may transmit the lifting (or vibration) of the bobbin (1650) to the rear of the display panel (110). The bobbin ring (1652) may have a ring shape attached to the front of the bobbin (1650), a disc shape covering the entire front of the bobbin (1650), or a cap shape covering the front and upper outer surface of the bobbin (1650). The bobbin ring (1652) may be expressed as a bobbin protection member, etc., and is not limited to the term.

An adhesive member (402) may be placed between the display panel (110) and the vibration device (500). The display panel (110) and the vibration device (500) may be attached via the adhesive member (402). For example, the adhesive member (402) may be placed between the display panel (110) and the bobbin ring (1652). The display panel (110) and the bobbin ring (1652) may be attached via the adhesive member (402). The adhesive member (402) may be at least one of a double-sided tape, a double-sided foam tape, a double-sided pad, a double-sided foam pad, a single-sided tape, a single-sided foam tape, a single-sided pad, a single-sided foam pad, an adhesive, and a bond, but is not limited thereto. As shown in FIG. 2, the adhesive member (402) may be formed at a portion where one or more vibration devices (500) are attached to the display panel (110). Alternatively, the adhesive member (402) may be formed on the entire back surface of the display panel (110). For example, the adhesive member (402) may be formed on the entire surface between the back surface of the display panel (110) and one or more vibration devices (500). As another example, the adhesive member (402) may be formed on the entire surface between the back surface of the display panel (110) and the bobbin ring (1652).

Referring to FIG. 2, the vibration device (500) may further include an expanding portion (1614). For example, the expanding portion (1614) may be formed integrally with the plate (1610). The plate (1610) of the vibration device (500) may have various shapes, including a cylindrical shape and a cylinder shape. One side of the plate (1610) may have a protrusion having a larger diameter than the remaining portion of the plate (1610). The area of the protrusion having a larger diameter may be expressed as an expanding portion (1614). The expanding portion (1614) may have an annular shape. An extension (1612) for fixing the vibration device (500) may be formed on a portion of the expanding portion (1614).

A connecting member (333) may be arranged in the extension (1612). The connecting member (333) may include a screw and a nut. For example, the nut may be fixed to the supporting member (300). One or more vibration devices may be coupled to the supporting member (300) by the nut and the screw. Accordingly, the vibration device (500) may be accommodated in the supporting hole (350S) in the supporting member (300).

The nut may be, for example, a self-clinching nut. An example of a self-clinching nut may be a PEM® nut, but the embodiment is not limited thereto. When a self-clinching nut is used, vibrations generated from the vibrating device (500) may be partially absorbed by the nut, which is the self-clinching nut, thereby reducing vibrations transmitted to the support member (300).

<First embodiment>

Hereinafter, with reference to FIGS. 3 and 4, the structure of the display device according to the first embodiment of the present specification will be described in detail. FIG. 3 is a plan view showing the display device according to the first embodiment of the present specification. FIG. 4 is a cross-sectional view showing the structure of the display device according to the first embodiment taken along the cutting line I-I' shown in FIG. 3.

Referring to FIGS. 3 and 4, the display device according to the first embodiment includes a display module (100), a support member (300), a middle frame (700), a heat dissipation hole (H), an exhaust hole (T), a pad (PD), and a vibration device (500).

The display module (100) may have a display panel (110) and a functional film (130). The display panel (110) may have a rectangular shape of a landscape structure that is long in the X-axis direction on the XY plane. It is not limited to this structure, and may have a rectangular shape of a portrait structure that is long in the Y-axis direction. Alternatively, it may have a circular, oval, or polygonal structure. The functional film (130) may be attached to an outer surface of the display panel (110).

A support member (300) is arranged on the rear side of the display panel (110). A gap space (GS) may be formed between the display panel (110) and the support member (300). A vibration device (500) may be arranged on the central portion of the support member (300). For example, a support hole (350S) may be formed on the central portion of the support member (300), and the vibration device (500) may be inserted into it. One end of the vibration device (500) may be attached to the rear side of the display panel (110). The other end of the vibration device (500) may be fixed to the support member (300). Since the detailed structure of the vibration device (500) has been described above, a duplicate description will be omitted.

A middle frame (700) is arranged at the edge of the display panel (110) and the edge of the support member (300) to fix and connect the display panel (110) and the support member (300). The middle frame (700) has an adhesive member in the frame structure to connect the display panel (110) and the support member (300) to each other. In some cases, the middle frame (700) can be expressed as a fixing member having elasticity. More simply, the middle frame can be replaced with only an adhesive member having excellent elasticity.

The exhaust port (T) may be formed in a part of the middle frame (700). The exhaust port (T) is a structure connecting the gap space (GS) and the outside of the display module (100). Air in the gap space (GS) may flow to the outside through the exhaust port (T). A plurality of exhaust ports (T) may be formed in the middle frame (700). For example, a plurality of exhaust ports (T) may be arranged at four sides of the middle frame (700) excluding the four corners of the display panel (110). In particular, as illustrated in FIG. 2, the exhaust ports (T) may be arranged at the left side and the right side of the display panel (110). In addition, the exhaust ports (T) may be further arranged at the upper side and the lower side of the display panel (110). For example, when the side of the X-axis is longer than the side of the Y-axis, the number of outlets (T) arranged on the left side and the right side may be greater than the number of outlets (T) arranged on the upper side and the lower side. Alternatively, the sum of the sizes of the outlets (T) arranged on the left side and the right side may be greater than the sum of the sizes of the outlets (T) arranged on the upper side and the lower side.

The support member (300) may be provided with a heat dissipation hole (H) arranged around the support hole (350S). The heat dissipation hole (H) may be arranged between the support hole (350S) into which the vibration device (500) is inserted and the edge of the support member (300). The heat dissipation hole (H) is a hole penetrating the support member (300) and is a structure connecting the outside of the display device and the gap space (GS). External air may flow into the gap space (GS) through the heat dissipation hole (H). The heat dissipation hole (H) may have a structure in which a plurality of heat dissipation holes are arranged.

For example, the heat dissipation hole (H) may include a first heat dissipation hole (H1) having a first size, a second heat dissipation hole (H2) having a second size, and a third heat dissipation hole (H3) having a third size. The first heat dissipation hole (H1) is arranged closest to the support hole (350S) and may be formed in a circular shape having the largest diameter. The second heat dissipation hole (H2) is arranged between the first heat dissipation hole (H1) and the edge of the support member (300) and may be formed in a circular shape having a smaller diameter than the first heat dissipation hole (H1). The third heat dissipation hole (H3) is arranged between the second heat dissipation hole (H2) and the edge of the support member (300) and may be formed in a circular shape having a smaller diameter than the second heat dissipation hole (H2), i.e., the smallest diameter.

As illustrated in FIG. 3, the heat dissipation holes (H) may be arranged on the left and right sides of the vibration device (500) along the X-axis with respect to the vibration device (500). In addition, the heat dissipation holes (H) may be further arranged on the upper and lower sides of the vibration device (500) along the Y-axis with respect to the vibration device (500). Although not illustrated in the drawing, the heat dissipation holes (H) may also be arranged radially around the vibration device (500).

It is preferable that the plurality of heat dissipation holes (H1, H2, H3) have the largest size at a portion close to the vibration device (500) and gradually smaller sizes as they move away from the vibration device (500). As the vibration device (500) vibrates, the display panel (110) vibrates, and since the amplitude is the largest at a portion close to the vibration device (500) and gradually smaller as they move away from the vibration device (500), it is preferable to set the sizes of the heat dissipation holes (H1, H2, H3) differently in response to the change in amplitude.

A pad (PD) is bonded to the back surface of the display panel (110). The pad (PD) may be formed of an organic material having excellent elasticity. For example, it may be formed of a material such as urethane or memory foam. It is preferable that the pad (PD) has a size larger than the heat dissipation hole (H) and is arranged to overlap so as to completely cover the heat dissipation hole (H). When the vibration device (500) is not in operation, the pad (PD) is preferably spaced apart from the support member (300) in which the heat dissipation hole (H) is formed at a slight distance. However, it is not limited thereto, and the end of the pad (PD) may be in contact with the support member (300).

Hereinafter, with reference to FIG. 5, the structure of the pad (PD) according to the first embodiment of the present specification will be described in detail. FIG. 5 is a perspective view showing the structure of the pad provided in the display device according to the first embodiment of the present specification.

Referring to FIG. 5, the pad (PD) may have a wedge shape whose cross-sectional shape is a right triangle. For example, as illustrated in FIG. 5, it may have a bottom surface (BS), a vertical square side surface (VS), a vertical triangle upper surface (US), a vertical triangle lower surface (DS), and a slanted surface (SS). The bottom surface (BS) may have a square shape that can sufficiently cover the entire area of the heat dissipation hole (H). The vertical square side surface (VS) is a square-shaped surface that extends vertically from one short side of the bottom surface (BS). The vertical triangle upper surface (US) is a triangular surface that extends vertically from the upper side of the bottom surface (BS). The vertical triangle lower surface (DS) is a triangular surface that extends vertically from the lower side of the bottom surface (BS). The vertical triangle upper surface (US) and the vertical triangle lower surface (DS) are arranged opposite to each other and in parallel. The inclined plane (SS) is a rectangular inclined plane that extends from the top of the vertical rectangular side (VS) to the other short side of the base (BS).

The bottom surface (BS) of the pad (PD) may be attached to the rear surface of the display panel (110). In particular, it is preferable to place the vertical square side surface (VS) close to the vibration device (500). As a result, the vertex side (i.e., the side corresponding to the vertex in the cross-sectional structure) of the pad (PD) may be placed between the first heat dissipation hole (H1) and the vibration device (500). Meanwhile, the other side of the bottom surface (BS) opposite to the vertical square side surface (VS) may be placed between the third heat dissipation hole (H3) and the edge of the display panel (110).

Hereinafter, with reference to FIGS. 6a and 6b, a mechanism for heat dissipation by air flow is described as the vibration device (500) operates in the display device according to the first embodiment of the present specification. FIGS. 6a and 6b are cross-sectional views illustrating changes in the internal structure of the display device according to the first embodiment as the vibration device operates.

Referring to Fig. 6a, as the vibration device (500) moves along the +Z axis, the display panel (110) may be pushed upward. Since the edge of the display panel (110) is fixed to the support member (300) by the middle frame (700), the portion of the display panel (100) where the vibration device (500) is placed is convexly raised in the +Z axis direction.

At this time, since the volume of the gap space (GS) increases, external air is introduced into the gap space (GS) through the heat sink (H). At this time, external air can also be introduced into the gap space (GS) through the exhaust port (T). However, external air is mainly introduced through the heat sink (H) which has a relatively larger area.

Referring to FIG. 6b, as the vibration device (500) moves in the -Z direction, the display panel (110) may be pulled down. Since the edge of the display panel (110) is fixed to the support member (300) by the middle frame (700), the portion of the display panel (100) where the vibration device (500) is placed becomes concave in the -Z axis direction.

At this time, the pad (PD) blocks the heat dissipation hole (H). Therefore, the air in the gap space (GS) is discharged to the outside through the exhaust hole (T). In particular, the pad (PD) is attached to the rear of the display panel (110) in an inverted triangle structure, and the highest part is arranged close to the vibration device (500). As the vibration device (500) vibrates, the display panel (110) vibrates, and at this time, the amplitude of the part close to the vibration device (500) is the largest, and the amplitude gradually decreases as it gets farther away from the vibration device (500).

By this structure and operating principle, in the process of the display panel (110) becoming concave, the pad (PD) sequentially covers from the first heat dissipation hole (H1) to the third heat dissipation hole (H3). As a result, the air in the gap space (GS) is pushed laterally and eventually discharged to the outside through the exhaust hole (T). At this time, some of the air may also be discharged through the second heat dissipation hole (H2) and the third heat dissipation hole (H3) before the first heat dissipation hole (H1) is completely blocked. However, since the second heat dissipation hole (H2) and the third heat dissipation hole (H3) have a smaller size than the first heat dissipation hole (H1), the discharge is mainly performed through the exhaust hole (T).

The vibration device (500) does not reciprocate only once, but vibrates at a frequency of 20 Hz to 20,000 Hz, which is an audible range. Accordingly, as the vibration of the vibration device (500) is repeated, inertia of air flow occurs, and the air flow can be mainly conducted along a path that flows in through the heat dissipation holes (H1, H2, H3) and flows out through the exhaust hole (T).

Due to this air flow, heat generated by the operation of the vibration device (500) can be smoothly discharged to the outside without staying in the gap space (GS). In addition, fresh air with low temperature can be introduced from the outside into the gap space (GS) to cool the heat generated in the vibration device (500) and/or the display panel (110).

<Second embodiment>

Hereinafter, a display device according to a second embodiment of the present specification will be described with reference to FIGS. 7 and 8. FIG. 7 is a plan view showing a display device according to a second embodiment of the present specification. FIG. 8 is a cross-sectional view showing the structure of a display device according to the second embodiment taken along the cutting line II-II' shown in FIG. 7.

Referring to FIGS. 7 and 8, a display device according to the second embodiment includes a display module (100), an inner panel (310), a back cover (350), a middle frame (700), a heat dissipation hole (H), a ventilation hole (V), an exhaust hole (T), a pad (PD), and a vibration device (500).

The display module (100) may have a display panel (110) and a functional film (130). The display panel (110) may have a rectangular shape of a landscape structure that is long in the X-axis direction on the XY plane. It is not limited to this structure, and may have a rectangular shape of a portrait structure that is long in the Y-axis direction. Alternatively, it may have a circular, oval, or polygonal structure. The functional film (130) may be attached to an outer surface of the display panel (110).

An inner panel (310) is arranged on the back of the display panel (110). A gap space (GS) may be formed between the display panel (110) and the inner panel (310). A middle frame (700) may be arranged in the border area of the inner panel (310) and may be joined to the back surface of the display panel (110).

For example, a middle frame (700) may be placed between the edge of the display panel (110) and the edge of the inner panel (310) to fixally connect the display panel (110) and the support member (300). The middle frame (700) may have an adhesive member in the frame structure to connect the display panel (110) and the support member (300) to each other. In some cases, the middle frame (700) may be expressed as a fixing member having elasticity. More simply, the middle frame may be replaced with only an adhesive member having excellent elasticity.

A back cover (350) is arranged on the back of the inner panel (310). The inner panel (310) and the back cover (350) may be joined at a certain interval. Alternatively, the back surface of the inner panel (310) and the front surface of the back cover (350) may have a structure in which they are joined to each other. FIG. 8 illustrates a structure in which the inner edge and the outer edge are joined to each other using an adhesive means.

The back cover (350) has a vertical border portion (350V). The vertical border portion (350V) is spaced apart from the edge of the display module (100) by a certain distance. A border gap (BG) may be formed between the vertical border portion (350V) of the back cover (350) and the display module (100).

A vibration device (500) may be arranged in the central portion of the inner panel (310) and the back cover (350). For example, a support hole (350S) may be formed in the central portion of the inner panel (310) and the back cover (350), and the vibration device (500) may be inserted therein. One end of the vibration device (500) may be attached to the rear surface of the display panel (110). The other end of the vibration device (500) may be fixed to the back cover (350). The inner panel (310) and the back cover (350) may have an integrated structure as a support member. In this case, the inner panel (310) may be defined as a first support member, and the back cover (350) may be defined as a second support member. Since the detailed structure of the vibration device (500) has been described above, a duplicate description will be omitted.

The exhaust port (T) may be formed in a part of the middle frame (700). The exhaust port (T) is a structure connecting the gap space (GS) and the outside of the display module (100). Air in the gap space (GS) may flow to the outside through the exhaust port (T) and the border gap (BG). A plurality of exhaust ports (T) may be formed in the middle frame (700). For example, a plurality of exhaust ports (T) may be arranged at four sides of the display panel (110) except for the four corners of the middle frame (700). In particular, as illustrated in FIG. 7, the exhaust ports (T) may be arranged at the left side and the right side of the display panel (110). In addition, the exhaust ports (T) may be further arranged at the upper side and the lower side of the display panel (110).

The inner panel (310) may be provided with a heat dissipation hole (H) arranged around the support hole (350S). The heat dissipation hole (H) may be arranged between the support hole (350S) into which the vibration device (500) is inserted and the edge of the inner panel (310). The heat dissipation hole (H) is a hole penetrating the inner panel (310) and is a structure connecting the outside of the display device and the gap space (GS). External air may flow into the gap space (GS) through the heat dissipation hole (H). The heat dissipation hole (H) may have a structure in which a plurality of heat dissipation holes are arranged.

For example, the heat dissipation hole (H) may include a first heat dissipation hole (H1) having a first size, a second heat dissipation hole (H2) having a second size, and a third heat dissipation hole (H3) having a third size. The first heat dissipation hole (H1) is arranged closest to the support hole (350S) and may be formed in a circular shape having the largest diameter. The second heat dissipation hole (H2) is arranged between the first heat dissipation hole (H1) and the edge of the support member (300) and may be formed in a circular shape having a smaller diameter than the first heat dissipation hole (H1). The third heat dissipation hole (H3) is arranged between the second heat dissipation hole (H2) and the edge of the support member (300) and may be formed in a circular shape having a smaller diameter than the second heat dissipation hole (H2), i.e., the smallest diameter.

As illustrated in FIG. 7, the heat dissipation holes (H) may be arranged on the left and right sides of the vibration device (500) along the X-axis with respect to the vibration device (500). In addition, the heat dissipation holes (H) may be further arranged on the upper and lower sides of the vibration device (500) along the Y-axis with respect to the vibration device (500). Although not illustrated in the drawing, the heat dissipation holes (H) may also be arranged radially around the vibration device (500).

It is preferable that the plurality of heat dissipation holes (H1, H2, H3) have the largest size at a portion close to the vibration device (500) and gradually smaller sizes as they move away from the vibration device (500). As the vibration device (500) vibrates, the display panel (110) vibrates, and since the amplitude is the largest at a portion close to the vibration device (500) and gradually smaller as they move away from the vibration device (500), it is preferable to set the sizes of the heat dissipation holes (H1, H2, H3) differently in response to the change in amplitude.

The back cover (350) may be provided with a ventilation hole (V) arranged around the support hole (350S). The ventilation hole (V) may be arranged to overlap the heat dissipation hole (H). For example, the ventilation hole (V) may have a larger size than the heat dissipation hole (H) and may be arranged to completely include the heat dissipation hole (H). Accordingly, external air may flow into the gap space (GS) through the ventilation hole (V) and the heat dissipation hole (H).

A pad (PD) is bonded to the back surface of the display panel (110). The pad (PD) may be formed of an organic material having excellent elasticity. For example, it may be formed of a material such as urethane or memory foam. It is preferable that the pad (PD) has a size larger than the heat dissipation hole (H) and is arranged to overlap so as to completely cover the heat dissipation hole (H). When the vibration device (500) is not in operation, the pad (PD) is preferably spaced apart from the support member (300) in which the heat dissipation hole (H) is formed at a slight distance. However, it is not limited thereto, and the end of the pad (PD) may be in contact with the support member (300).

In this structure, as the vibration device (500) moves along the +Z axis, the display panel (110) can be pushed upward. The edge of the display panel (110) is fixed to the inner panel (310) by the middle frame (700), and the inner panel (310) is fixed to the back cover (350), so that the portion of the display panel (100) where the vibration device (500) is placed is convexly raised in the +Z axis direction.

At this time, since the volume of the gap space (GS) increases, external air is introduced into the gap space (GS) through the vent (V) and the heat dissipation hole (H). At this time, external air can also be introduced into the gap space (GS) through the exhaust hole (T). However, external air is mainly introduced through the vent (V) and the heat dissipation hole (H) which have relatively larger areas.

As the vibration device (500) moves in the -Z direction, the display panel (110) can be pulled down. Since the edge of the display panel (110) is fixed to the inner panel (310) and the back cover (350) by the middle frame (700), the portion of the display panel (100) where the vibration device (500) is placed becomes concave in the -Z direction. At this time, the pad (PD) blocks the heat dissipation hole (H). Therefore, the air in the gap space (GS) is discharged to the outside through the exhaust hole (T).

The pad (PD) is attached to the rear of the display panel (110) in an inverted triangle structure, and the highest part is positioned close to the vibration device (500). As the vibration device (500) vibrates, the display panel (110) vibrates. At this time, the amplitude of the part close to the vibration device (500) is the largest, and the amplitude gradually decreases as it gets farther away from the vibration device (500).

By this structure and operating principle, in the process of the display panel (110) becoming concave, the pad (PD) sequentially covers from the first heat dissipation hole (H1) to the third heat dissipation hole (H3). As a result, the air in the gap space (GS) is pushed laterally and eventually discharged to the outside through the exhaust hole (T). At this time, some of the air may also be discharged through the second heat dissipation hole (H2) and the third heat dissipation hole (H3) before the first heat dissipation hole (H1) is completely blocked. However, since the second heat dissipation hole (H2) and the third heat dissipation hole (H3) have a smaller size than the first heat dissipation hole (H1), the discharge is mainly performed through the exhaust hole (T).

As the display panel (110) is repeatedly vibrated by the vibration device (500), inertia of air flow occurs. Accordingly, a path can be formed in which the air flow mainly flows in through the ventilation hole (V) and the heat dissipation holes (H1, H2, H3) and flows out through the exhaust hole (T).

Due to this air flow, heat generated by the operation of the vibration device (500) can be smoothly discharged to the outside without staying in the gap space (GS). In addition, fresh air with low temperature can be introduced from the outside into the gap space (GS) to cool the heat generated in the vibration device (500) and/or the display panel (110).

<Third embodiment>

Hereinafter, a third embodiment of the present specification will be described with reference to FIG. 9. FIG. 9 is a plan view showing a display device according to the third embodiment of the present specification.

Referring to FIG. 9, the display device according to the third embodiment has the same basic structure as that of the first embodiment illustrated in FIG. 3. The difference lies in the shape and structure of the heat dissipation hole (H). The heat dissipation hole (H) arranged in the display device according to the third embodiment is formed in a triangular shape. For example, the base of the triangle is arranged around the vibration device (500), and the vertex of the triangle is arranged farther away from the vibration device (500). That is, the heat dissipation hole (H) may have a shape having the longest width at a location close to the vibration device (500) and the width sequentially decreasing as it moves away from the vibration device (500).

The shape of the heat dissipation hole (H) illustrated in Fig. 9 is only an example and is not limited to this shape. As another example, it may have a shape in which a large square, a medium square, and a small square are arranged in succession. The heat dissipation hole (H) is characterized by having a shape in which the opening area is largest at a location close to the vibration device (500) and the opening area gradually decreases as it moves away from the vibration device (500).

<Example 4>

Hereinafter, a fourth embodiment of the present specification will be described with reference to FIG. 10. FIG. 10 is a perspective view showing the structure of a pad provided in a display device according to the fourth embodiment of the present specification. The fourth embodiment describes a case where the pad has a different structure from the pad described above.

Referring to FIG. 10, the pad (PD) according to the fourth embodiment may have a wedge shape in the shape of a quadrangular pyramid. For example, the pad (PD) may have a wedge shape whose cross-sectional shape is a right-angled trapezoid. For example, as illustrated in FIG. 10, the pad (PD) may have a bottom surface (BS), a vertical square side surface (VS), a vertical trapezoid upper surface (US), a vertical saddle-shaped lower surface (DS), a top surface (TS), and a slanted surface (SS). The bottom surface (BS) may have a square shape that can sufficiently cover the entire area of the heat dissipation hole (H). The vertical square side surface (VS) is a square-shaped surface that extends vertically from one short side of the bottom surface (BS). The vertical trapezoid upper surface (US) is a surface of a vertical trapezoid that extends vertically from the upper side of the bottom surface (BS). The vertical trapezoid lower surface (DS) is a surface of a vertical trapezoid that extends vertically from the lower side of the bottom surface (BS). The vertical trapezoidal upper side (US) and the vertical trapezoidal lower side (DS) are arranged opposite to each other and parallel. The upper side (TS) is the side opposite to the bottom side (BS) and is a side that extends a certain distance in the horizontal direction from the vertical square side (VS). The inclined plane (SS) is a square inclined plane that extends the upper side (TS) and the bottom side (BS).

The upper surface (TS) has a certain width (W). The width (W) of the upper surface may have a size corresponding to 30% to 70% of the size of the first heat dissipation hole (H1) illustrated in FIG. 3. However, it is not limited thereto, and may have a different size ratio depending on conditions such as the size of the display panel (110) and the number of heat dissipation holes (H). For example, the width (W) of the upper surface may have a size capable of covering the first heat dissipation hole (H1).

The bottom surface (BS) of the pad (PD) may be attached to the rear surface of the display panel (110). In particular, it is preferable that the vertical square side surface (VS) be arranged close to the vibration device (500). As a result, the top surface (TS) of the pad (PD) may be arranged to overlap at least a portion of the first heat dissipation hole (H1). Meanwhile, the side of the bottom surface (BS) opposite to the vertical square side surface (VS) may be arranged between the third heat dissipation hole (H3) and the edge of the display panel (110).

In the various embodiments described above, the description has been made mainly on the case where one vibration device is arranged on one display panel. However, two or more vibration devices may be arranged. In this case, an exhaust port, a ventilation port, and a pad according to the present specification may be arranged between the vibration device and the frame of the display panel. In addition, an exhaust port, a ventilation port, and a pad according to the present specification may also be arranged between vibration devices.

The vibration device according to the embodiment of the present specification can be applied to a vibration device arranged in a display device. A display device according to an embodiment of the present specification may be applied to a mobile device, a video phone, a smart watch, a watch phone, a wearable apparatus, a foldable apparatus, a rollable apparatus, a bendable apparatus, a flexible apparatus, a curved apparatus, an electronic notebook, an electronic book, a portable multimedia player (PMP), a personal digital assistant (PDA), an MP3 player, a mobile medical device, a desktop PC, a laptop PC, a netbook computer, a workstation, a navigation system, a vehicle navigation system, a vehicle display device, a vehicle device, a theater device, a theater display device, a television, a wallpaper device, a signage device, a game device, a notebook, a monitor, a camera, a camcorder, and home appliances. And, the vibration device of this specification can be applied to an organic light-emitting lighting device or an inorganic light-emitting lighting device. When the vibration device or the sound generating device is applied to a lighting device, it can function as a light and a speaker. And, when the display device of this specification is applied to a mobile device, etc., it can be at least one of a speaker, a receiver, and a haptic, but is not limited thereto.

A display device according to an embodiment of the present specification can be described as follows.

A display device according to an embodiment of the present specification includes a display panel, a first support member, a second support member, a vibration device, and a pad. The display panel displays an image. The first support member is disposed on the rear surface of the display panel and includes at least one heat dissipation hole. The second support member is disposed on the rear surface of the first support member and includes at least one ventilation hole. The vibration device has one end attached to the rear surface of the display panel and the other end fixed to the second support member. The pad is attached to the rear surface of the display panel and is disposed on the first support member in correspondence with the heat dissipation hole.

According to various embodiments of the present disclosure, the display device further includes a middle frame and an exhaust port. The middle frame joins a border area of the first support member and a border area of the display panel. The exhaust port is at least one that passes through the middle frame.

According to various embodiments of the present specification, the pads are arranged to overlap each other and have a larger area than the heat sink.

According to various embodiments of the present specification, the heat sink is arranged to overlap the ventilation hole.

According to various embodiments of the present disclosure, the heat sink is arranged to surround the vibration device. The heat sink includes a first heat sink having a first diameter, a second heat sink having a second diameter smaller than the first diameter, and a third heat sink having a third diameter smaller than the second diameter.

According to various embodiments of the present disclosure, the pad has a wedge shape having a bottom surface attached to the rear surface of the display panel, a vertical side surface extending from one end of the bottom surface toward the first support member, and an inclined surface connecting the other end of the bottom surface to the uppermost end of the vertical side surface.

According to various embodiments of the present specification, the inclined surface of the pad is arranged to overlap the heat dissipation hole.

According to various embodiments of the present specification, depending on the operation of the vibration device, the pad closes or opens the heat sink.

According to various embodiments of the present specification, when the gap between the display panel and the first support member has a maximum value due to the operation of the vibration device, the pad opens all the heat dissipation holes by a predetermined distance from the first support member. When the gap between the display panel and the first support member has a minimum value, the pad closes all the heat dissipation holes.

According to various embodiments of the present specification, as the gap between the display panel and the first support member changes from a maximum value to a minimum value, the first heat dissipation opening is sequentially closed from the first heat dissipation opening to the third heat dissipation opening. As the gap changes from a minimum value to a maximum value, the third heat dissipation opening is sequentially opened from the first heat dissipation opening to the first heat dissipation opening.

According to various embodiments of the present specification, as the gap between the display panel and the first support member changes from a maximum value to a minimum value, air between the display panel and the first support member is discharged to the outside through the exhaust port. As the gap changes from a minimum value to a maximum value, air is sucked in from the outside through the vent.

In addition, a display device according to various embodiments of the present specification includes a display panel, a support member, a fixing member, at least one discharge port, a pad, and a vibration device. The display panel displays an image. The support member is arranged on the rear side of the display panel and includes at least one heat dissipation port. A middle frame joins a border area of the support member and a border area of the display panel. The discharge port penetrates the middle frame. A pad is attached to the rear side of the display panel and is arranged on the support member to correspond to the heat dissipation port. The vibration device penetrates the support member and has one end attached to the rear surface of the display panel and the other end fixed to the support member.

According to various embodiments of the present specification, the support member has an inner panel and a back cover. The inner panel is arranged on the rear side of the display panel and has a heat dissipation hole formed therein. The back cover is arranged on the rear side of the inner substrate and has a ventilation hole formed therein for opening the heat dissipation hole.

According to various embodiments of the present disclosure, the pads overlap each other to cover the heat sink and have a larger area than the heat sink.

According to various embodiments of the present specification, the heat sink includes a first heat sink arranged around the vibration device, a second heat sink arranged around the first heat sink, and a third heat sink arranged around the second heat sink.

According to various embodiments of the present specification, the first heat dissipation hole has a first opening area. The second heat dissipation hole has a second opening area smaller than the first opening area. The third heat dissipation hole has a third opening area smaller than the second opening area.

According to various embodiments of the present disclosure, the pad has a wedge-shaped member having a bottom, a vertical side, and a beveled surface. The bottom is attached to the rear surface of the display panel at a predetermined distance from the vibration device. The vertical side extends from one end near the vibration device at the bottom toward the support member. The beveled surface connects the uppermost end of the vertical side to the other end of the bottom.

According to various embodiments of the present specification, the distance between the inclined surface of the pad and the support member gradually increases as one goes toward the other end of the bottom surface in the vertical direction.

The embodiments of the present specification have been described in more detail with reference to the attached drawings. However, the present specification is not necessarily limited to these embodiments, and various modifications may be made without departing from the technical spirit of the present specification. Accordingly, the embodiments disclosed in the present specification are not intended to limit the technical spirit of the present specification but to explain it, and the scope of the technical spirit of the present specification is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The protection scope of the present specification should be interpreted by the claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present specification.

100: Display module 110: Display panel
300: Support member 500: Vibration device
700: Middle Frame 310: Inner Panel
350: Back cover H: Radiator
H1: First radiator H2: Second radiator
H3: Third heat sink V: Vent
T: Exhaust PD: Pad

Claims (19)

A display panel that displays images;
A first support member disposed on the rear side of the display panel and including at least one heat dissipation hole;
A second support member disposed on the rear side of the first support member and including at least one ventilation hole;
A vibration device having one end attached to the back surface of the above display panel and the other end fixed to the second support member; and
A display device comprising a pad attached to the rear surface of the display panel and positioned corresponding to the heat dissipation hole on the first support member. In paragraph 1,
A middle frame that joins the edge area of the first support member and the edge area of the display panel; and
A display device further comprising at least one discharge port penetrating the middle frame. In paragraph 1,
The above pads are a display device arranged to overlap each other and have a larger area than the above heat dissipation hole. In paragraph 1,
The above-mentioned heat dissipation hole is a display device arranged to overlap the above-mentioned ventilation hole. In paragraph 1,
The above heat dissipation holes are arranged to surround the vibration device,
A first heat sink having a first diameter;
a second heat sink having a second diameter smaller than the first diameter; and
A display device having a third heat dissipation hole having a third diameter smaller than the second diameter. In paragraph 5,
The above pad,
The bottom surface attached to the rear surface of the above display panel;
A vertical side extending from one end of the bottom surface toward the first support member; and
A display device having a wedge shape having an inclined surface connecting the uppermost end of the vertical side to the other end of the bottom surface. In paragraph 6,
A display device in which the inclined surface of the above pad is arranged to overlap the heat dissipation hole. In paragraph 7,
An indicator device that closes or opens the heat dissipation hole according to the operation of the vibration device. In Article 8,
When the gap between the display panel and the first support member has a maximum value due to the operation of the vibration device,
The above pad is spaced apart from the first support member by a certain distance and opens all of the heat dissipation holes,
When the gap between the above display panel and the first support member has a minimum value,
The above pad is an indicator device that closes all of the above heat dissipation holes. In Article 9,
As the gap between the display panel and the first support member changes from the maximum value to the minimum value,
Close sequentially from the first radiator to the third radiator,
As it changes from the minimum value to the maximum value,
An indicator device that sequentially opens from the third heat sink to the first heat sink. In Article 9,
As the gap between the display panel and the first support member changes from the maximum value to the minimum value,
The air between the above display panel and the first support member is discharged to the outside through the heat dissipation hole and the ventilation hole,
As it changes from the minimum value to the maximum value,
A display device that draws air from the outside through the above-mentioned ventilation hole and the above-mentioned heat dissipation hole. A display panel that displays images;
A support member disposed on the rear side of the display panel and including at least one heat dissipation hole;
A middle frame that joins the edge area of the above-mentioned support member and the edge area of the above-mentioned display panel;
At least one discharge port penetrating the middle frame;
A pad attached to the rear of the above display panel and positioned corresponding to the heat dissipation hole on the above support member; and
A display device including a vibration device having one end attached to the back surface of the display panel through the support member and the other end fixed to the support member. In Article 12,
The above support member is,
An inner panel disposed on the rear of the above display panel and having the heat dissipation hole formed therein; and
A display device having a back cover disposed on the rear side of the inner panel and having a ventilation hole formed therein for opening the heat dissipation port. In Article 12,
The above pad is a display device that has a larger area than the above heat sink and is overlapped to cover the above heat sink. In Article 12,
The above heat dissipation hole is,
A first heat sink arranged around the above vibration device;
A second radiator arranged around the first radiator; and
A display device including a third heat sink arranged around the second heat sink. In Article 15,
The above first heat dissipation port has a first opening area,
The above second heat dissipation hole has a second opening area smaller than the first opening area,
A display device in which the third heat dissipation hole has a third opening area smaller than the second opening area. In Article 15,
The above pad,
A bottom surface attached at a predetermined distance from the vibration device on the rear surface of the above display panel;
A vertical side extending from one end near the vibrating device on the bottom surface toward the support member;
A display device having a wedge shape having an inclined surface connecting the uppermost end of the vertical side to the other end of the bottom surface. In Article 17,
The distance between the inclined surface of the above pad and the support member is,
A display device that gradually moves away from the other end of the bottom surface in the vertical direction. In Article 17,
As the gap between the display panel and the support member changes from a maximum value to a minimum value, the air between the display panel and the support member is discharged to the outside through the heat dissipation hole and the exhaust hole.
An indicator device that draws air from the outside through the heat sink as the temperature changes from the minimum value to the maximum value.

Images