Display device

Abstract

This display device may comprise: a display unit; a cover bottom coupled to a rear surface of the display unit; a circuit board mounted on the rear surface of the cover bottom; and a speaker module having one side adjacent to the circuit board and mounted on the rear surface of the cover bottom, wherein the speaker module comprises: a speaker unit for outputting sound; and a speaker case including a unit seating part on which the speaker unit is mounted, and a sound pressure flow path having one end adjacent to the unit seating part and the other end extending to one side of the speaker module. The display device can increase heat dissipation efficiency by utilizing existing components.

Description

display device

[0001] The present invention relates to a display device with improved heat dissipation efficiency.

[0002] As the information society develops, the demand for display devices is also increasing in various forms, and in response to this, recent display devices include liquid crystal displays (LCDs), field emission displays (FEDs), plasma display panels (PDPs), and electroluminescence devices.

[0003] The liquid crystal panel of the liquid crystal display device includes a liquid crystal layer and a TFT substrate and a color filter substrate facing each other with the liquid crystal layer interposed therebetween, and can display an image using light provided from a backlight unit.

[0004] As an example of an electroluminescent device (ELD), an active-matrix type organic light-emitting display device is commercially available. Because OLED displays are self-luminous, they do not require a backlight and offer advantages over liquid crystal displays (LCDs) in terms of response speed, viewing angle, and other factors. Therefore, they are attracting attention as next-generation displays.

[0005] Recently, materials such as OLED have been able to implement curved display panels because they emit light on their own without a backlight structure, making it possible to implement curved display devices.

[0006] As display devices become thinner, electronic components are increasingly packed into the internal space, potentially leading to issues with heat dissipation reliability. To improve the heat dissipation efficiency of display devices, there is a growing need to add heat-dissipating components or improve existing structures.

[0007] The present invention is characterized by improving the heat dissipation efficiency of a display device by using a speaker module to solve the above problem.

[0008] A display device is provided, comprising: a display unit; a cover bottom coupled to a rear surface of the display unit; a circuit board mounted on the rear surface of the cover bottom; and a speaker module mounted on the rear surface of the cover bottom with one side adjacent to the circuit board, the speaker module including a speaker unit that outputs sound; a unit mounting portion on which the speaker unit is mounted, and a speaker case including a sound pressure passage having one end adjacent to the unit mounting portion and the other end extending to one side of the speaker module.

[0009] The above negative pressure path may have one end wider than the other.

[0010] One end of the above negative pressure path may have a size that is three to six times smaller than the other end.

[0011] The other side of the above speaker module can be opened at a position corresponding to the unit mounting portion.

[0012] The other side of the above speaker module may be located at the bottom of the above display device.

[0013] The side wall of the negative pressure passage may include a curved edge formed at the inlet or outlet.

[0014] The speaker module includes a front case coupled to the cover bottom and a rear case coupled to the rear of the front case to form an acoustic space, and the rear surface of the speaker unit is mounted so as to be in contact with the rear surface of the unit mounting portion, and the sound pressure passage can be formed in the front case.

[0015] The front case includes a grid-shaped reinforcing rib protruding from the back surface, and the reinforcing rib may be omitted at a portion where the negative pressure passage is located.

[0016] The thickness in the front-back direction of the negative pressure passage may be less than or equal to the thickness of the reinforcing rib.

[0017] The front-to-back thickness of the negative pressure passage may be thinner than the front-to-back thickness of the unit mounting portion.

[0018] The present invention can improve heat dissipation efficiency of a display device by utilizing existing components.

[0019] In addition, the number of other heat-dissipating components can be reduced, which can reduce material costs and improve production management and product quality (material defects).

[0020] The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention belongs from the description below.

[0021] Figure 1 is a front perspective view illustrating an example of a display device of the present invention.

[0022] Figure 2 is a rear view of the display device of the present invention with the back cover removed.

[0023] FIG. 3 is a rear view showing the front case of the speaker of the display device of the present invention.

[0024] Fig. 4 is a front view showing the rear case of the speaker module of the display device of the present invention.

[0025] Fig. 5 is a cross-sectional perspective view of a sound pressure passage of a speaker module of a display device of the present invention.

[0026] Fig. 6 is a cross-sectional exploded perspective view of a sound pressure passage of a speaker module of a display device of the present invention.

[0027] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components will be given the same reference numbers and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably only for the convenience of writing the specification, and do not in themselves have distinct meanings or roles. In addition, when describing the embodiments disclosed in this specification, if it is determined that a specific description of a related known technology may obscure the gist of the embodiments disclosed in this specification, a detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention.

[0028] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0029] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0030] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0031] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0032] Meanwhile, the display device (100) described herein is an intelligent display device (100) that adds computer support functions to, for example, a broadcast reception function. While remaining faithful to the broadcast reception function, it can be equipped with an Internet function and other functions, thereby providing a more convenient interface such as a manual input device, touch screen, or space remote control. In addition, it can be connected to the Internet and a computer with support for wired or wireless Internet functions, and can perform functions such as email, web browsing, banking, or games. A standardized, general-purpose operating system (OS) can be used for these various functions.

[0033] Accordingly, the display device (100) described in the present invention can perform various user-friendly functions, for example, since various applications can be freely added or deleted on a general-purpose OS kernel. More specifically, the display device (100) can be, for example, a network TV, HBB TV, smart TV, etc., and in some cases, can also be applied to a smartphone.

[0034] Figure 1 is a front perspective view illustrating an example of a display device of the present invention. The display device (100) includes a display portion (150) that occupies most of the front surface area, a case top that covers the front perimeter and side surfaces of the display portion (150), and a cover bottom (120) that covers the rear surface.

[0035] The display device (100) of the present invention may have a rectangular body including a pair of long sides and a pair of short sides. It may include a first long side (First Long Side, LS1), a second long side (Second Long Side, LS2) opposite the first long side (LS1), a first short side (First Short Side, SS1) adjacent to the first long side (LS1) and the second long side (LS2), and a second short side (Second Short Side, SS2) opposite the first short side (SS1).

[0036] Although the long side extending horizontally and the short side extending vertically are depicted in the drawing, the long side and the short side may be of equal length, and the long side may also be arranged vertically.

[0037] For convenience of explanation, the long side is defined as the side extending in the horizontal direction (x-axis direction) and the short side is defined as the side extending in the vertical direction (y-axis direction). However, as mentioned above, the present invention is not limited thereto.

[0038] The first direction (DR1) may be a direction parallel to the long side (LS1, LS2) of the display panel (100), and the second direction (DR2) may be a direction parallel to the short side (SS1, SS2) of the display panel (100). The third direction (DR3) may be a direction perpendicular to the first direction (DR1) and / or the second direction (DR2).

[0039] The side of the display device (100) that displays an image may be referred to as the front or front surface. When the display device (100) displays an image, the side from which the image cannot be observed may be referred to as the rear or back surface. When the display device displays an image, the side from which the image cannot be observed may be referred to as the rearward direction or rear side (rear surface).

[0040] When viewing the display from the front or front, the first long side (LS1) may be referred to as the upper side or upper surface. Similarly, the second long side (LS2) may be referred to as the lower side or lower surface. Similarly, the first short side (SS1) may be referred to as the right side or right surface, and the second short side (SS2) may be referred to as the left side or left surface.

[0041] The display device may include a display unit (150) that outputs images. The display unit (150) may convert image signals, data signals, OSD signals, control signals, etc. processed by the control unit or image signals, data signals, control signals, etc. received from the interface unit to generate driving signals. The display unit (150) may include a display panel having a plurality of pixels.

[0042] The plurality of pixels provided on the display panel may have RGB sub-pixels. Alternatively, the plurality of pixels provided on the display panel may have RGBW sub-pixels. The display unit (150) may convert image signals, data signals, OSD signals, control signals, etc. processed by the control unit to generate driving signals for the plurality of pixels.

[0043] The display device (100) includes a display unit (150) that occupies most of the front surface area and a case that covers the rear side of the display unit (150) and packages the display unit (150).

[0044] The display unit (150) can be a PDP (Plasma Display Panel), LCD (Liquid Crystal Display), OLED (Organic Light Emitting Diode), a flexible display, etc., and may also be a 3D display. The 3D display unit (150) can be divided into a glasses-free type and a glasses type.

[0045] Recently, display devices (100) can utilize a display unit (150) that can be bent, such as LEDs (Light Emitting Diodes) or OLEDs (Organic Light Emitting Diodes), to implement a curved screen rather than a flat screen.

[0046] Figure 2 is a rear view of the display device (100) of the present invention with the back cover removed. The display device (100) may include a display unit (150) that outputs an image and a cover bottom (120) that supports the back surface thereof. The cover bottom (120) may have a circuit board (181) that controls the display device (100), such as a power supply unit, a T-con, and a main board, and a speaker module (140) mounted on the back surface.

[0047] As the display device (100) becomes thinner, the space for mounting electronic components on the back of the display unit (!50) becomes narrower, which leads to a problem in that the heat dissipation efficiency decreases. To improve the heat dissipation effect, a heat sink or heat dissipation fin with high thermal conductivity can be added, but there is a problem in that the number of components increases, which increases the manufacturing cost and increases the size and weight of the product.

[0048] Accordingly, the display device (100) of the present invention can discharge heat generated from a circuit board (181) mounted on the back surface of a display unit (150) by using wind generated by the sound pressure output from a speaker module (140).

[0049] If the sound hole (147) of the speaker module (140) is positioned laterally, it may be exposed to the user's view. To position the sound hole (147) at the bottom, the speaker module (140) may be positioned at the bottom of the display device (100), as illustrated in FIG. 2.

[0050] Speaker modules (140) can be placed in pairs on the left and right to output balanced sound, and a circuit board (181) including a power supply unit, T-con, and main board can be mounted on the upper side of the speaker module (140).

[0051] The speaker module (140) and the circuit board (181) may be arranged adjacent to each other. They may be arranged vertically as in Fig. 2, but when the speaker module (140) is positioned laterally of the display device (100), the circuit board (181) may be positioned in the central portion of the display device (100).

[0052] Hereinafter, for convenience of explanation, the direction facing the circuit board (181) is referred to as one side of the speaker module (140), and the opposite direction is referred to as the other side. In the present embodiment, one side of the speaker module (140) means the upper side, and in the present embodiment, the other side of the speaker module (140) means the lower side.

[0053] FIG. 3 is a rear view showing a front case (1411) of a speaker module (140) of a display device (100) of the present invention, and FIG. 4 is a front view showing a rear case (1412) of a speaker module (140) of a display device (100) of the present invention.

[0054] The speaker module (140) may include a plurality of speaker units (145) having different characteristics. For example, it may include a woofer (1451) that outputs low-frequency sounds, a tweeter (1453) that outputs high-frequency sounds, and a mid-range (1452) that is optimized for outputting the sound range between them.

[0055] The woofer (1451) and mid-range (1452) can be placed facing the front, i.e., the back of the display unit, and the tweeter (1453) that outputs high-frequency sound can be placed facing the bottom of the display device (100) because it has strong straightness.

[0056] It may include a speaker case (1411, 1412) in which a plurality of speaker units (145) are stored. Since the display device (100) of the present invention has a thin thickness, the speaker module (140) may also be stored in a thin, rectangular box-shaped speaker case (1411, 1412).

[0057] Each speaker unit (145) includes a unit mounting portion (144) on which it is mounted, and may have unit mounting portions (144) of different shapes and sizes depending on the size of the speaker unit (145). Since the woofer (1451) and the mid-range (1452) are positioned toward the front, the rear of the woofer (1451) and the mid-range (1452) may be positioned so that they touch the unit mounting portion (144) formed in the rear case (1412), and then the front case (1411) may be coupled. The tweeter (1453) may be assembled so as to face the lower side of the speaker case (1411, 1412).

[0058] The low-frequency sound output from the woofer (1451) does not have a large directionality, but the mid-range (1452) or tweeter (1453) can be positioned toward the lower side of the display device (100) where the sound hole (147) is located in order to effectively transmit sound to the user.

[0059] The speaker unit (145) mounted on the speaker module (140) faces the outside of the display device (100), and a circuit board (181) can be mounted on the opposite side. Accordingly, the speaker unit (145) can be located on the other side of the speaker module (140).

[0060] The speaker case (1411, 1412) may include reinforcing ribs (143) that protrude in a grid shape for rigidity, and the reinforcing ribs (1431) of the front case (1411) and the reinforcing ribs (1432) of the rear case (1412) are spaced apart from the case fastening portion (142) to implement a sound box (enclosure).

[0061] The speaker module (140) of the present invention is characterized by including a sound pressure passage (146) of the speaker module (140) to dissipate heat from the circuit board (181) by utilizing sound pressure generated when sound is output from the speaker unit (145). The sound pressure passage (146) may extend from the unit mounting portion (144) of the speaker module (140) toward one side of the speaker module (140) facing the circuit board (181).

[0062] As illustrated in Fig. 3, one end of the sound pressure passage (146) is connected to the unit mounting portion (144) located on the other side (lower side) of the speaker module (140) and can extend toward one side (upper side). The sound pressure generated when sound is output from the speaker unit (145) can be supplied to the circuit board (181) located on one side of the speaker module (140) through the sound pressure passage (146).

[0063] Among the speaker units (145), the woofer (1451) and mid-range (1452) output sound toward the front case (1411), so the direction of sound pressure is also toward the front. Accordingly, the sound pressure path (146) can be formed in the front case (1411) so that the sound pressure path (146) is connected from the front in the thickness direction of the unit mounting portion (144).

[0064] The speed of the air passing through the negative pressure passage (146) must be faster to supply stronger wind to the circuit board (181). The other end (1462) of the negative pressure passage (146) facing the circuit board (181) can be formed narrower than one end (1461) of the negative pressure passage (146) connected to the unit mounting portion (144).

[0065] The width of the entrance (1461) of the sound pressure passage (146) may be equal to or smaller than the width of the unit mounting portion (144), and may be configured to have a size that is three to six times larger than the width of the other end (1462) of the sound pressure passage.

[0066] Fig. 5 illustrates a cross-section of a sound pressure passage (146) of a speaker module of a display device of the present invention. If the cross-sectional area of ​​the sound pressure passage (146) is too large, the strength of the wind supplied to the circuit board (181) becomes weak. In order for air to pass through the sound pressure passage (146) at high pressure, the front-rear thickness (c) of the sound pressure passage (146) can be configured to have a thin thickness of 1 mm or less.

[0067] The thickness (c) of the negative pressure passage (146) is smaller than the thickness of the speaker module (140), and can be configured to have a thickness less than or equal to the thickness (d) of the reinforcing rib (143) of the front case (1411) described above.

[0068] Fig. 6 is a cross-sectional perspective view of a speaker module (140) of a display device (100) of the present invention. In the cross-section corresponding to the rear of the sound pressure passage (146), (a) shows a part (1411b) of a front case including a rear case (1412) and a rear portion (1464) of the sound pressure passage (146), and (b) shows a part (1411a) of a front case including a front portion (1463) of the sound pressure passage (146).

[0069] As shown in Fig. 5, the thickness (c) of the negative pressure passage (146) can be formed to a thickness corresponding to or thinner than the reinforcing rib (143) of the front case (1411) to minimize the influence on the role of the resonance chamber of the speaker case (1411, 1412).

[0070] The negative pressure passage (146) may include a curved portion (1466) at the corner of the side wall portion (1465) at the inlet (1461) and the outlet (1462) as shown in (b) of FIG. 7 to prevent the flow of air passing through the negative pressure passage (146) from being obstructed and the speed from being reduced.

[0071] As described above, the display device (100) of the present invention can improve heat dissipation efficiency by utilizing existing components.

[0072] In addition, the number of other heat-dissipating components can be reduced, which can reduce material costs and improve production management and product quality (material defects).

[0073] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are intended to be included within the scope of the present invention.

[0074] With respect to various embodiments for implementing the present invention, duplicate descriptions are omitted as they have been described above in the previous table of contents, Best Mode for Carrying Out the Invention.

[0075] Since the present invention can be applied to display devices in various fields, its industrial applicability is recognized.

Claims

1. Display section; A cover bottom coupled to the back surface of the above display unit; A circuit board mounted on the back surface of the above cover bottom; and One side includes a speaker module mounted on the back surface of the cover bottom adjacent to the circuit board, The above speaker module a speaker unit that outputs sound; and A display device comprising a unit mounting portion on which the speaker unit is mounted, and a speaker case including a sound pressure passage having one end adjacent to the unit mounting portion and the other end extending to one side of the speaker module.

2. In paragraph 1, The above negative pressure path A display device characterized by having a width that is wider than that of the other end.

3. In paragraph 2, A display device characterized in that one end of the negative pressure path has a size that is three to six times larger than the other end.

4. In paragraph 1, A display device characterized in that the other side of the speaker module includes an open sound hole at a position corresponding to the unit mounting portion.

5. In paragraph 4, A display device, characterized in that the other side of the speaker module is located at the bottom of the display device.

6. In paragraph 1, A display device characterized in that the side wall of the negative pressure passage includes a curved edge formed at the inlet or outlet.

7. In paragraph 1, The above speaker module includes a front case coupled to the cover bottom and a rear case coupled to the rear of the front case to form an acoustic space. The back surface of the above speaker unit is mounted so as to be in contact with the back surface of the above unit mounting portion, A display device characterized in that the negative pressure path is formed in the front case.

8. In paragraph 7, It includes a grid-shaped reinforcing rib protruding from the back surface of the above front case, A display device characterized in that the reinforcing rib is omitted in the part where the negative pressure passage is located.

9. In paragraph 8, A display device characterized in that the thickness of the negative pressure passage in the front-rear direction is less than or equal to the thickness of the reinforcing rib.

10. In paragraph 1, A display device characterized in that the front-back thickness of the negative pressure passage is thinner than the front-back thickness of the unit mounting portion.

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