WO2021225285A1

WO2021225285A1 - Display device

Info

Publication number: WO2021225285A1
Application number: PCT/KR2021/004126
Authority: WO
Inventors: 이상훈; 강정일
Original assignee: 삼성전자주식회사
Priority date: 2020-05-08
Filing date: 2021-04-02
Publication date: 2021-11-11
Also published as: KR20210136708A

Abstract

A display device according to an aspect of the present invention comprises: a display panel; a light guide plate arranged at the rear of the display panel; an LED module comprising a plurality of LEDs arranged along a side surface of the light guide plate, so as to emit light at the light guide plate; a printed board assembly (PBA) for display device control and image processing; and a heat-dissipating plate having the LED module mounted on one side thereof, and having the PBA mounted on the other side thereof, wherein the heat-dissipating plate and the PBA are arranged not to overlap on the front and rear of the display panel, so that heat transferred through the heat-dissipating plate and heat generated from the PBA are dissipated to the front and exterior of the circumference of the display panel.

Description

display device

The present invention relates to a display device. More specifically, it relates to a display device having an improved grounding structure while easily dissipating heat inside the display device.

In general, a display device is a device that displays an image on a screen, such as a television, a computer monitor, and a digital information display.

As a display panel, a display module using a liquid crystal display panel is widely used.

The display device may include a display panel and a backlight unit (BLU) for incident light on the display panel. The display panel may be formed of a pair of substrates facing each other with a liquid crystal layer interposed therebetween. The backlight unit may be provided with an LED module including a light source (a plurality of LEDs) for incident light to the display panel. The LED module not only generates light but also emits heat, which can deteriorate the display panel.

In addition, the display apparatus may include a display panel and a plurality of printed board assemblies (PBAs) used to drive the backlight unit. Conventionally, such a plurality of PBAs were positioned at the rear of the display panel. Therefore, the heat generated by the plurality of PBAs may deteriorate the display panel located in the front. In addition, when a thin-walled display device is mounted on a wall, even if the heat generated by the plurality of PBAs has a structure that emits heat to the rear, effective heat dissipation cannot be achieved due to the structural characteristics of being mounted close to the wall.

Accordingly, the display device may have a heat dissipation structure for preventing deterioration of the liquid crystal panel, and the heat dissipation structure may be implemented by a structure including a fan and an air filter. However, in this case, the manufacturing process becomes complicated and the manufacturing cost increases. Since such a heat dissipation structure occupies a considerable volume, there is a limit to its application to a display device having a slim design. Specifically, in the case of a heat dissipation structure including a fan and an air filter, a high maintenance cost is required because the filter must be replaced periodically.

In addition, since the plurality of PBAs of the LED module are provided as separate grounding structures, the number of wires added to implement the grounding structure increases, which increases the manufacturing cost and increases the risk of overcurrent flowing between the electronic components of the display device. this existed.

Disclosed is a display device capable of easily managing internal heat through an arrangement structure of a plurality of PBAs, a backlight unit, and a heat sink and effectively grounding a plurality of PBAs and a backlight unit through a simple structure.

A display apparatus according to the spirit of the present invention includes a display panel; a light guide plate disposed behind the display panel; an LED module including a plurality of LEDs disposed along a side surface of the light guide plate to irradiate light to the light guide plate; a PBA (Printed Board Assembly) provided for controlling a display device and processing an image; and a heat dissipation plate on which the LED module is mounted on one side and the PBA is mounted on the other side, wherein the heat dissipation plate and the PBA are disposed so as not to overlap the front and rear of the display panel to form the heat dissipation plate It may be provided so that heat transmitted through and heat generated from the PBA are radiated to the outside of the front of the periphery of the display panel.

The heat dissipation plate includes a first heat dissipation plate including a first mounting surface on which the PBA is mounted and a second heat dissipation plate including a second mounting surface on which the LED module is mounted, wherein the first mounting surface is a display panel It is formed to face the front of the second mounting surface and the second heat dissipation plate may extend along a direction in which the plurality of LEDs are arranged.

The first mounting surface may be disposed outside the periphery of the display panel.

The first mounting surface is disposed under the display panel, the second heat dissipation plate protrudes from the lower end of the first heat dissipation plate toward the rear, and the second mounting surface is formed on the upper portion of the second heat dissipation plate. can be

The light guide plate extends to an upper end of the LED module mounted on the second mounting surface, and the heat dissipation plate includes a support formed on a surface opposite to the first mounting surface of the first heat dissipation plate, and the support portion is the The front surface of the lower portion of the light guide plate may be supported.

a rear reflection sheet covering the rear surface of the light guide plate and disposed in contact with the rear surface; can

The second heat dissipation plate may be disposed outside the circumference of the light guide plate.

The second heat dissipation plate is disposed under the light guide plate,

The second heat dissipation plate may protrude forward from an upper end of the first heat dissipation plate, and the second mounting surface may be formed on an upper portion of the second heat dissipation plate.

The light guide plate extends to an upper end of the LED module mounted on the second mounting surface, and the heat dissipation plate includes a support formed on a surface opposite to the first mounting surface of the first heat dissipation plate, and the support portion is the light guide plate It may be supported by a rear chassis that supports the rear surface of the .

The rear chassis may include a spacer that protrudes from the rear chassis between the light guide plate and the plurality of LEDs and is provided to support a lower portion of the light guide plate to space the light guide plate and the plurality of LEDs apart.

and a rear reflection sheet disposed behind the light guide plate to cover a rear surface of the light guide plate and to be in contact with the rear surface.

A first cover portion provided to cover the circumference of the display panel from the front of the display panel, and a second cover portion provided under the first cover portion and protruding toward the front of the display panel than the first cover portion It may further include a front cover (Front Cover).

It is formed between the second cover part and the first heat dissipation plate and may further include a PBA receiving part in which the PBA is disposed.

The second cover portion of the front cover includes a plurality of holes for communicating the PBA accommodation portion and the outside, and through the plurality of holes, the heat of the PBA accommodation portion is provided to flow outwardly in front of the periphery of the display panel. can

The display device may further include a speaker disposed in the PBA receiving unit corresponding to the position where the plurality of holes are formed.

The heat dissipation plate may be formed of a metal material.

A display device according to the spirit of the present invention, a display panel; a light guide plate disposed behind the display panel; an LED module including a plurality of LEDs mounted along a side surface of the light guide plate to irradiate a light source to the light guide plate; PBA (Printed Board Assembly) provided for image transmission of the display device; and a metal heat dissipation plate to which cathodes of the plurality of LEDs and a ground terminal of the PBA are connected.

The heat dissipation plate includes a first heat dissipation plate including a first mounting surface on which the PBA is mounted and a second heat dissipation plate including a second mounting surface on which the LED module is mounted, and the first mounting surface faces the front It is formed to face the second mounting surface and the second heat dissipation plate may extend along a direction in which the plurality of LEDs are mounted.

The heat dissipation plate may be disposed under the display panel.

A front cover including a first cover portion provided to cover the circumference of the display panel from the front of the display panel and a second cover portion provided under the first cover portion and protruding forward from the first cover portion Cover) is further included,

The second cover part may include a support flange that protrudes from the rear surface toward the rear and is formed of an insulator for supporting the heat dissipation plate.

The first heat dissipation plate and the second heat dissipation plate of the heat dissipation plate are integrally formed to provide an effective heat dissipation structure as well as a rigid reinforcement structure that more firmly supports the internal configuration of the display device together with the middle mold supporting the display panel and the light guide plate. can

The heat dissipation plate is made of a metal material and the ground terminal of the cathode PBA of the LED is connected at the same time, and the structure sharing the same ground minimizes the risk of damage to the components inside the display device due to the surge voltage, and is used between each electronic component. It is also possible to achieve the effect of preventing an overcurrent from flowing due to the reference potential difference.

1 is a perspective view illustrating a front exterior of a display device according to an embodiment of the present invention.

FIG. 2 is an exploded front perspective view illustrating the display device of FIG. 1 by disassembling it.

3 and 4 are cross-sectional views viewed from the right side of a cross-section including a PBA of a display device according to an embodiment of the present invention.

FIG. 5 is an enlarged view of area A of FIG. 2 .

6 is an exploded front perspective view illustrating an exploded display device according to another embodiment of the present invention.

7 and 8 are cross-sectional views viewed from the right side of a cross-section including a PBA of a display device according to another embodiment of the present invention.

FIG. 9 is an enlarged view of area B of FIG. 5 .

10 is a diagram schematically illustrating a ground structure of a PBA and an LED module of a display device according to an embodiment of the present invention together with a circuit.

The configuration shown in the embodiments and drawings described in this specification is only a preferred example of the disclosed invention, and there may be various modifications that can replace the embodiments and drawings of the present specification at the time of filing of the present application.

In addition, the same reference numbers or reference numerals in each drawing in the present specification indicate parts or components that perform substantially the same functions.

In addition, the terms used herein are used to describe the embodiments, and are not intended to limit and/or limit the disclosed invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It does not preclude the possibility of the presence or addition of figures, numbers, steps, operations, components, parts, or combinations thereof.

In addition, terms including an ordinal number such as "first", "second", etc. used herein may be used to describe various elements, but the elements are not limited by the terms, and the terms are It is used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The term “and/or” includes a combination of a plurality of related listed items or any of a plurality of related listed items.

On the other hand, the terms "up and down direction", "lower side", "front-back direction", etc. used in the following description are defined based on the drawings, and the shape and position of each component is not limited by these terms.

The directions of "front", "rear", "upper", "lower", "left" and "right" are uniformly referred to throughout the specification based on the direction shown in FIG. 1 of the accompanying drawings. 1 shows the X-axis, Y-axis, and Z-axis directions perpendicular to each other, the X-axis direction means the left-right direction of the display device, the Y-axis direction means the vertical direction of the display device, and the Z-axis direction is It means the front-back direction of the display device.

A display device refers to a device that displays an image. The display apparatus may include a television, a monitor, a mobile device, and the like. Hereinafter, a television will be mainly described as an example of the display device. The television may include a flat television, a curved television, a bendable television, and the like. Hereinafter, a preferred embodiment according to the present invention will be described mainly with a flat television as an example of the television. It will be described in detail with reference to the accompanying drawings.

1 is a perspective view illustrating a front exterior of a display device according to an embodiment of the present invention. FIG. 2 is an exploded front perspective view illustrating the display device of FIG. 1 by disassembling it. 3 and 4 are cross-sectional views viewed from the right side of a cross-section including a PBA of a display device according to an embodiment of the present invention. FIG. 5 is an enlarged view of area A of FIG. 2 .

1 to 4 , the display apparatus 10 may include a chassis assembly for accommodating and supporting the display panel 100 and the backlight unit.

The display panel 100 is composed of a liquid crystal panel formed by encapsulating liquid crystal between two glass substrates each having electrodes, and can display an image in the front.

The display panel 100 may display an image toward the first direction Z, which is the front.

The chassis assembly may include a front cover 800 , a middle mold 710 , a rear chassis 720 , and a rear cover 730 .

The front cover 800 may include an opening for exposing the display panel 100 . The front cover 800 includes a bezel portion that covers the front outer side of the display panel 100 , and a top side portion that is bent from the end of the bezel portion to the rear side and covers the side surface of the middle mold 710 .

The front cover 800 may be coupled to the front side of the middle mold 710 to maintain the display panel 100 installed in the middle mold 710 . The specific shape and structure of the front cover 800 of the display device 10 according to embodiments of the present invention will be described later.

In the middle mold 710, the optical sheet 101, the display panel 100, and the front cover 800 are sequentially installed on the front side, and the light guide plate 200, the reflective sheet 620 and the rear chassis 720 are installed on the rear side. are installed in sequence to support each component, and may be provided to maintain the display panel 100 and the rear chassis 720 spaced apart from each other.

The rear chassis 720 may include a middle mold coupling part (not shown) coupled to the middle mold 710 at the upper end and a front cover coupling part (not shown) coupled to the front cover 800 at the bottom. The rear chassis 720 may further include a support 512 supporting the light guide plate 200 on the rear surface of the light guide plate.

The rear chassis 720 is formed in a high-strength polygonal plate shape, and includes a metal material (for example, aluminum or aluminum alloy, etc.) that has little thermal deformation due to heat generated by the heat generated by the internal configuration of the display device 10 . can do.

The rear chassis 720 may be made of a material having high thermal conductivity. Accordingly, the heat generated by the light guide plate 200 or the reflective sheet 620 can be easily dissipated to improve the reliability of the display device 10 .

The rear chassis 720 may be formed of plastic (eg, polycarbonate (PC)) or by adding glass fiber to the plastic material.

The display device 10 may further include a rear cover 730 that covers the rear of the rear chassis 720 surrounding the chassis assembly to protect and accommodate the chassis assembly. The rear cover 730 may be provided to be finally coupled to the front cover 800 at the rear of the rear chassis 720 after the rear chassis 720 is fixed to the front cover 800 and the middle mold 710 . The fastening of the front cover 800 and the rear cover 730 may be performed through a plurality of fastening members (not shown).

The display apparatus 10 may further include a back light unit (BLU) provided to supply light to the display panel 100 .

The backlight unit may include a light source module including a light source and a substrate on which the light source is mounted, a light guide plate 200 and various optical sheets 101 disposed on a movement path of light emitted from the light source module.

The light guide plate 200 may be disposed to face the rear surface of the display panel 100 from the rear of the display panel 100 . The light guide plate 200 is formed in a rectangular plate shape with left and right widths longer than the vertical length to correspond to the display panel 100 , and is made of a transparent material to allow light to pass therethrough.

The light source module may include a light source that emits light.

The backlight unit is disposed so that the light source faces the side surface of the light guide plate 200 disposed at the rear of the display panel 100 , and supplies light to the display panel 100 through the light guide plate 200 Edge type (Edge Type) Alternatively, the light source may be largely divided into a direct type in which the light source is disposed directly below the display panel 100 . In the case of the display device 10 according to embodiments of the present invention, it will be described on the premise that it is provided as an edge type.

The light source module may be provided as an LED package in which an LED that emits light (Light Emitting Diode, LED) is accommodated. The light source module of the display device 10 according to the embodiments of the present invention will be described on the premise that the LED module 300 is used. The LED module 300 may be provided to supply light to the display panel 100 . The LED module 300 may supply light to the display panel 100 from the rear of the display panel 100 . Unlike a general LED, the light source of the LED module 300 may be provided as a mini-LED formed of an LED chip having a size of 100 to 300 μm.

The LED module 300 may include a plurality of LEDs 310 and an LED substrate 320 on which the plurality of LEDs 310 are disposed.

Referring to FIG. 3 , the LED module 300 is disposed to face the side surface of the light guide plate 200 disposed at the rear of the display panel 100 , and supplies light to the display panel 100 through the light guide plate 200 . can be provided. That is, referring to FIG. 1 , the substrate may be provided in the shape of a bar extending in the X-direction, in other words, in the left-right direction. That is, the LED substrate 320 may have a length extending in the left-right direction or the X-direction. 3 to 5 , the LED module 300 , specifically, the plurality of LEDs 310 may be disposed on the LED substrate 320 along the side surface of the light guide plate 200 to irradiate light to the light guide plate 200 .

The LED substrate 320 may be formed of a glass material. However, the present invention is not limited thereto, and the LED substrate 320 may be formed of a material having different physical properties. A circuit pattern for transmitting driving power and signals to the plurality of LEDs 310 may be formed on the LED substrate 320 .

An optical sheet 101 may be disposed between the light guide plate 200 and the display panel 100 in order to improve the characteristics of the light emitted from the LED module 300 .

The optical sheet 101 may include a prism sheet (not shown) and a protective sheet (not shown).

The prism sheet includes a prism pattern having a triangular prism shape, and a plurality of these prism patterns are arranged adjacent to each other to form a plurality of bands. is formed The light diffused from the LED module 300 is refracted while passing through the prism pattern, and accordingly, the light may be incident on the display panel in a vertical direction.

The protective sheet is a configuration that protects various components from external impact or the inflow of foreign substances. In particular, the prism sheet is easily scratched, and the protective sheet can prevent the prism sheet from being scratched.

Inside the display device 10 , a power substrate 400a for supplying power to the display device 10 , a signal processing substrate 400b for processing various image and sound signals, and an image signal to the display panel 100 . A timing control board (not shown) to transmit may be disposed.

However, the present invention is not limited thereto, and the timing control substrate (not shown) may be implemented in an integrated form with the signal processing substrate.

The various boards may be configured as a PBA (Printed Board Assembly) in which electrical and mechanical components are mounted on a printed circuit board (PCB) or connected to another printed circuit board to be electrically and mechanically finally processed. In the following description, various electrical substrates provided for image transmission of the display device 10, such as the power substrate 400a, the signal processing substrate 400b, and the timing control substrate (not shown), are collectively referred to as PBA. However, in the case of the above-described LED substrate 320, the arrangement structure in the heat dissipation plate 500 applied to the embodiments of the present invention will be described as a configuration separate from the above-described PBA.

Conventionally, such a PBA was mainly located at the rear of the display panel. Therefore, the heat generated by the PBA may deteriorate the display panel located in the front. In addition, when a thin-walled display device is mounted on a wall, effective heat dissipation could not be achieved due to the structural characteristics of being mounted close to the wall, even if the heat generated from the PBA has a structure to radiate heat to the rear.

In addition, in the LED module 300, a separate heat dissipation structure is required to dissipate heat generated from the LED itself, which complicates the manufacturing process and leads to an increase in manufacturing cost. In addition, as described above, when a heat dissipation structure is provided at the rear of the display panel together with the PBA, there is a problem in that the thickness of the display device is increased in the front and rear directions.

The display device 10 according to an embodiment of the present invention has an LED module 300 mounted on one side, and a PBA on the other side in order to have an effective heat dissipation structure and a thickness in the front-rear direction of the portion on which the display panel of the display device is disposed becomes slim. It may include a heat dissipation plate 500 on which the 400 is mounted. In addition, the heat dissipation plate and the PBA are disposed so as not to overlap the front and rear of the display panel so that the heat transmitted through the heat dissipation plate and the heat generated from the PBA may be provided to radiate heat to the outside of the front of the periphery of the display panel. .

In other words, in addition to the structural shape of the heat dissipation plate 500 to be described later and the position disposed inside the display device 10 of the heat dissipation plate 500, each LED module 300 and By disposing the PBA 400, an effective heat dissipation structure may be formed. That is, the PBA 400 and the LED module 300 may form an integrated heat transfer and heat dissipation structure without the need for a separate heat dissipation structure, respectively.

Hereinafter, the heat dissipation plate 500 of the display device 10 according to an embodiment of the present invention will be described in detail.

The heat dissipation plate 500 includes a first heat dissipation plate 510 including a first mounting surface 511 on which the PBA 400 is mounted and a second mounting surface 521 on which the LED module 300 is mounted. Two heat dissipation plates 520 may be included. 2 to 5 , the first heat dissipation plate 510 and the second heat dissipation plate 520 may be integrally formed to constitute the heat dissipation plate 500 .

The meaning of being integrally formed means that the first heat dissipation plate 510 and the second heat dissipation plate 520 are physically integrally formed without a gap through a manufacturing method such as a mold in the process of manufacturing the heat dissipation plate 500 Alternatively, it may mean forming a single structure by contacting each other similarly to that shown in FIGS. 2 to 5 .

The first heat dissipation plate 510 including the first mounting surface 511 on which the PBA 400 is mounted may be formed in a plate shape to correspond to the width of the display panel 100 . In addition, it is formed of a metal material so that heat transfer and heat dissipation can be performed effectively, but the present invention is not limited thereto and may be implemented with other materials having high thermal conductivity.

The first heat dissipation plate 510 may be disposed such that the first mounting surface 511 faces the front of the display panel. This is to design the heat dissipation plate 500 so that heat can be emitted to the front rather than the rear of the display device 10 together with the arrangement structure in the display device 10 as will be described later.

A speaker 900 in addition to the PBA may be disposed on the first mounting surface 511 of the first heat dissipation plate 510 . 2 to 5 , although the speaker 900 is shown to be mounted on the lower end of the PBA 400 , the speaker 900 and the PBA 400 are a heat dissipation plate 500 , specifically a first heat dissipation plate 510 . The arrangement structure may be different within the range of maintaining the technical characteristics of being mounted on the first mounting surface 511 of the . For example, unlike FIGS. 2 to 5 , the speaker 900 may be mounted on the upper end of the PBA 400 . Alternatively, it may be mounted on both sides of the left and right sides of the PBA 400 .

The second heat dissipation plate 520 of the display apparatus 10 according to an embodiment of the present invention may protrude backward from the lower end of the first heat dissipation plate 510 . The second mounting surface 521 and the second heat dissipation plate 520 on which the LED module 300 is mounted may extend along a direction in which the plurality of LEDs 310 are disposed.

The LED module 300 is disposed to face the side surface of the light guide plate 200 disposed at the rear of the display panel 100 , and supplies light to the display panel 100 through the light guide plate 200 Edge type (Edge Type) It is provided as described above. However, in the LED module 300 of the display device 10 according to an embodiment of the present invention shown in FIGS. 2 to 5 , on the premise that the light guide plate 200 is provided in a rectangular plate shape, the light guide plate 200 ) is arranged to face the lower side of the four sides.

Therefore, the second mounting surface 521 of the second heat dissipation plate 520 may correspond to the upper surface in the above-described protrusion structure. That is, the second mounting surface 521 may be formed on the second heat dissipation plate 520 . The LED module 300 is disposed to face the side surface of the light guide plate 200 . That is, the plurality of LEDs 310 may be disposed along the side surface of the light guide plate 200 , and the LED substrate 320 on which the plurality of LEDs 310 are mounted may also be formed to extend along the side surface of the light guide plate 200 . That the LED module 300 is mounted on the second mounting surface 521 of the second heat dissipation plate 520 means that the LED substrate 320 is mounted on the second mounting surface 521 of the second heat dissipation plate 520 and can be used with the same meaning.

As described above, in the heat dissipation plate 500 , the first heat dissipation plate 510 and the second heat dissipation plate 520 are integrally formed, and the width in each X direction may be the same. Also, when viewed from the right side of the display device 10 , the cross section of the heat dissipation plate 500 may be provided in an L-shape.

3 and 4, the length in the Y direction of the first heat dissipation plate 510 on which the PBA 400 and the speaker 900 are mounted is the length of the second heat dissipation plate on which the LED module 300 is mounted. (520) It may be provided to be longer than the length in the Z direction. However, the length of the first heat dissipation plate 510 in the Y direction and the length of the second heat dissipation plate 520 in the Z direction are not limited thereto.

The heat dissipation plate 500 may be disposed outside the periphery of the display panel 100 . Specifically, the first heat dissipation plate 510 of the display device 10 according to an embodiment of the present invention may be disposed outside the periphery of the display panel 100 . Alternatively, the first mounting surface 511 of the first heat dissipation plate 500 may face the front of the display panel 100 , that is, in the Z direction, and may be disposed outside the periphery of the display panel 100 .

In other words, the PBA 400 , which was conventionally disposed on the rear of the display panel 100 , that is, on the rear of the display device 10 , is disposed so as not to overlap the front and rear of the display panel 100 together with the heat dissipation plate 500 . Thus, the heat transferred through the heat dissipation plate 500 and the heat generated from the PBA 400 may be provided in a structure in which heat is radiated to the outside of the periphery of the display panel 100 .

Assuming that the light guide plate 200 disposed at the rear of the display panel 100 is provided in a rectangular plate shape, the display device 10 according to an embodiment of the present invention shown in FIGS. The LED module 300 is disposed to face the lower side of the four sides of the light guide plate 200 as described above.

Considering the above-described integrated structure of the first heat dissipation plate 510 and the second heat dissipation plate 520 , the second mounting surface 521 of the second heat dissipation plate 500 is disposed below the light guide plate 200 . .

As a result, the second heat dissipation plate 520 is also disposed on the outside of the periphery of the display panel 100 , so that heat is not emitted to the display panel 100 , and further heat is easily radiated to the front of the display device 10 . possible effects can be achieved.

As in the conventional case, the problem caused by being disposed at the rear of the display panel 100 , that is, at the rear of the display device 10 , is the same as described above. In the case of the display device 10 according to an embodiment of the present invention, the first mounting surface 511 of the first heat dissipation plate 500 is disposed on the outside of the periphery of the display panel 100 so that the PBA 400 is a display panel. Without dissipating heat to the 100 , it is possible to further achieve the effect of easily dissipating heat to the front of the display device 10 . In addition, the first heat dissipation plate 510 and the second heat dissipation plate 520 constitute one heat dissipation plate 500 , and the heat dissipation plate 500 is generally disposed outside the periphery of the display panel 100 . Due to this, it is possible to form an effective heat exchange and heat dissipation structure.

Referring to FIGS. 3 and 4 , the first mounting surface 511 of the first heat dissipation plate 500 faces the front of the display panel 100 , that is, in the Z direction, and is disposed on the outside of the periphery of the display panel 100 . The second heat dissipation plate 520 may protrude from the lower end of the first heat dissipation plate 510 toward the rear, and the second mounting surface 521 may be formed on the second heat dissipation plate 520 . In this case, the light guide plate 200 may extend to the upper end of the LED module 300 mounted on the second mounting surface 521 .

In other words, although the light guide plate 200 is formed in a rectangular plate shape to correspond to the display panel 100 , when the upper end of the light guide plate 200 is arranged to coincide with the upper end of the display panel 100 , the lower end of the light guide plate 200 is It may extend further downward than the lower end of the display panel 100 . As a result, the light guide plate 200 may be formed such that the length in the left and right directions corresponds to the display panel 100 , but the length in the vertical direction is longer than that of the display panel 100 .

Specifically, as shown in FIGS. 3 and 4 , the light guide plate 200 may extend downwardly by a distance D from the lower end of the display panel 100 . That is, the extension distance from the position corresponding to the lower end of the display panel 100 of the light guide plate 200 to the upper end of the LED module 300 mounted on the second mounting surface 521 may be formed as a distance D.

Due to this structure, the LED module 300 may be provided in a structure that can sufficiently secure a separation distance from the display panel 100 . That is, as in the conventional structure, since the LED module 300 is disposed near the side surface of the display panel 100, it is possible to prevent a problem of causing deterioration in the side surface of the display panel.

The lower portion 200e (refer to FIGS. 3 and 4 ) of the light guide plate 200 corresponding to the distance D may be provided in a structure to be seated on the heat dissipation plate 500 .

Specifically, the front surface of the lower portion 200e of the light guide plate 200 may be supported by the first heat dissipation plate 510 . Since the first mounting surface 511 of the first heat dissipation plate 510 is disposed to face forward, the supporting surface of the first heat dissipation plate 510 supporting the front surface of the lower portion 200e of the light guide plate 200 is the first mounting surface. It may be the opposite surface of the surface 511 . A support surface of the first heat dissipation plate 510 supporting the front surface of the lower portion 200e of the light guide plate 200 may be defined as a support portion 512 .

When the surface located on one side of the first heat dissipation plate 510 facing the front of the display panel 100 is referred to as the first mounting surface 511 , the first heat dissipation plate 510 facing the rear of the display panel 100 is the The surface located on the other side may be defined as the support part 512 . The support part 512 is positioned opposite to the first mounting surface 511 and may be formed in a shape corresponding to the first mounting surface 511 . Since the first heat dissipation plate 510 is provided in a rectangular plate shape, the first mounting surface 511 and the support part 512 may also be formed in a rectangular shape. The heat dissipation plate 500 may serve as a support structure for more firmly supporting the light guide plate 200 together with the middle mold 710 .

If the front of the lower portion of the light guide plate 200 corresponding to distance D faces the support part 512 of the first heat dissipation plate 510 , the lower side of the four sides of the light guide plate 200 faces the LED module 300 . can be placed. Referring to FIG. 3 , a lower side of the four sides of the light guide plate 200 may be provided to contact the LED module 300 . Alternatively, alternatively, referring to FIG. 4 , the spacer 722 formed on the rear chassis 720 may be formed to secure a separation distance between the LED module 300 and the lower side of the four sides of the light guide plate 200 . .

Specifically, the rear chassis 720 may include a spacer 722 that protrudes from the rear chassis 720 between the light guide plate 200 and the plurality of LEDs 320 and is provided to support a portion of the lower end of the light guide plate 200 . . The spacer 722 may protrude along a direction in which a lower portion of the four side surfaces of the light guide plate 200 extends. Accordingly, the upper and both sides of the light guide plate 200 may be supported by the middle mold 710 , and the lower side thereof may be supported by the spacer 722 .

The light irradiated from the LED module 300 to the light guide plate 200 is not incident directly toward the display panel 100, but passes through the lower portion of the light guide plate 200 corresponding to distance D and then enters the display panel 100. do.

In this case, in order to prevent loss of light incident to the display panel 100 after passing through the lower portion of the light guide plate 200 corresponding to distance D, reflective sheets may be additionally disposed in front and rear of the light guide plate 200 .

The reflective sheet covers the rear surface of the light guide plate 200 and is disposed in front of the rear reflection sheet 610 and the light guide plate 200 disposed to be in contact with the rear surface, and covers the front surface of the lower portion 200e of the light guide plate 200 and covers the lower portion ( 200e) may include a front reflective sheet 620 disposed in contact with the front surface.

The rear reflection sheet 610 may be provided in a shape corresponding to the rear surface of the light guide plate 200 . That is, it may be formed to correspond to the rectangular shape of the light guide plate 200 .

The front reflection sheet 620 is also formed in a rectangular shape, but may be formed to cover only the front of the lower portion of the light guide plate 200 corresponding to the D distance. This is good for the light passing through the light guide plate 200 to minimize the loss of light to the rear of the light guide plate 200, but the front reflection sheet 620 is the light incident on the surface of the light guide plate 200 facing the display panel 100. to prevent blocking.

That is, the front reflective sheet 620 is provided only on the lower front surface of the light guide plate 200 corresponding to the distance D not facing the display panel 100 among the front surfaces of the light guide plate 200 to minimize light loss.

When the front reflection sheet 620 and the rear reflection sheet 610 are disposed, the support part 512 of the first heat dissipation plate 510 passes through the front reflection sheet 620 to the lower portion of the light guide plate 200 corresponding to the distance D. can support In addition, the light guide plate support 512 of the rear chassis 720 of the rear chassis 720 may support the rear surface of the light guide plate 200 through the rear reflection sheet 610 . 6 is an exploded front perspective view illustrating an exploded display device according to another embodiment of the present invention. 7 and 8 are cross-sectional views of a display device according to another embodiment of the present invention, including a PBA, as viewed from the right. FIG. 9 is an enlarged view of area B of FIG. 6 .

For an effective heat dissipation structure, the display device 10 according to another embodiment of the present invention may also include a heat dissipation plate 500 in which the LED module 300 is mounted on one side and the PBA 400 is mounted on the other side.

Hereinafter, the heat dissipation plate 500 of the display device 10 according to another embodiment of the present invention will be described in detail.

The heat dissipation plate 500 includes a first heat dissipation plate 510 including a first mounting surface 511 on which the PBA 400 is mounted and a second mounting surface 521 on which the LED module 300 is mounted. Two heat dissipation plates 520 may be included. 6 to 9 , the first heat dissipation plate 510 and the second heat dissipation plate 520 may be integrally formed to constitute the heat dissipation plate 500 . The meaning of being integrally formed is the same as described above.

The first heat dissipation plate 510 including the first mounting surface 511 on which the PBA 400 is mounted may be formed in a rectangular plate shape with left and right widths longer than the vertical length to correspond to the width of the display panel 100 . have. In addition, it is formed of a metal material so that heat transfer and heat dissipation can be performed effectively.

The first heat dissipation plate 510 may be disposed such that the first mounting surface 511 faces the front of the display panel 100 . This is to design the heat dissipation plate 500 so that heat can be emitted to the front rather than the rear of the display device 10 together with the arrangement structure in the display device 10 as will be described later.

A speaker 900 in addition to the PBA may be mounted on the first mounting surface 511 of the first heat dissipation plate 510 . 6 to 9 , although the speaker 900 is shown to be mounted at the lower end of the PBA 400 , the speaker 900 and the PBA 400 are a heat dissipation plate 500 , specifically a first heat dissipation plate 510 . The arrangement structure may be different within the range of maintaining the technical characteristics of being mounted on the first mounting surface 511 of the . For example, unlike FIGS. 6 to 9 , the speaker 900 may be mounted on the upper end of the PBA 400 . Alternatively, it may be mounted on both sides of the left and right sides of the PBA 400 .

The second heat dissipation plate 520 of the display apparatus 10 according to another embodiment of the present invention may protrude forward from the top of the first heat dissipation plate 510 . The second mounting surface 521 and the second heat dissipation plate 520 on which the LED module 300 is mounted may extend along a direction in which the plurality of LEDs 310 are disposed.

The LED module 300 is disposed to face the side surface of the light guide plate 200 disposed at the rear of the display panel 100 , and supplies light to the display panel 100 through the light guide plate 200 Edge type (Edge Type) It is provided as described above. However, in the LED module 300 of the display device 10 according to another embodiment of the present invention shown in FIGS. 6 to 9 , on the premise that the light guide plate 200 is provided in a rectangular plate shape, the light guide plate 200 ) is arranged to face the lower side of the four sides.

Therefore, the second mounting surface 521 of the second heat dissipation plate 520 may correspond to the upper surface in the above-described protrusion structure. That is, the second mounting surface 521 may be formed on the second heat dissipation plate 520 . The LED module 300 is disposed to face the side surface of the light guide plate 200 . That is, the plurality of LEDs 310 may be disposed along the side surface of the light guide plate 200 , and the LED substrate 320 on which the plurality of LEDs 310 are mounted may also be formed to extend along the side surface of the light guide plate 200 . That the LED module 300 is mounted on the second mounting surface 521 of the second heat dissipation plate 520 is a structure in which the LED substrate 320 is mounted on the second mounting surface 521 of the second heat dissipation plate 520 . and can be used in the same meaning as mounted.

As described above, in the heat dissipation plate 500 , the first heat dissipation plate 510 and the second heat dissipation plate 520 are integrally formed, and the width in each X direction may be the same. In addition, the cross section of the heat dissipation plate 500 when viewed from the right side of the display device 10 may be provided in a L-shape.

7 and 8, the length in the Y direction of the first heat dissipation plate 510 on which the PBA 400 and the speaker 900 are mounted is the length of the second heat dissipation plate on which the LED module 300 is mounted. (520) It may be provided to be longer than the length in the Z direction. However, the length of the first heat dissipation plate 510 in the Y direction and the length of the second heat dissipation plate 520 in the Z direction are not limited thereto.

The heat dissipation plate 500 may be disposed outside the periphery of the display panel 100 . Specifically, the second heat dissipation plate 520 of the display device 10 according to another embodiment of the present invention may be disposed outside the periphery of the display panel 100 .

Referring to FIG. 7 , a lower side of the four sides of the light guide plate 200 may be provided to contact the LED module 300 . Alternatively, alternatively, referring to FIG. 8 , the spacer 722 formed on the rear chassis 720 may be formed to secure a separation distance between the LED module 300 and the lower side of the four sides of the light guide plate 200 . .

Considering the above-described integrated structure of the first heat dissipation plate 510 and the second heat dissipation plate 520 , the first mounting surface 511 of the first heat dissipation plate 510 is disposed below the light guide plate 200 . .

As a result, the first heat dissipation plate 510 is also disposed on the outside of the periphery of the display panel 100 , so that heat is not emitted to the display panel 100 , and further heat is easily discharged to the front of the display device 10 . possible effects can be achieved.

As in the conventional case, the PBA 400 is disposed on the rear side of the display device 10 on the rear side of the display panel 100, and the problem caused is the same as described above. In the case of the display device 10 according to another embodiment of the present invention, the first mounting surface 511 of the first heat dissipation plate 500 is disposed on the outside of the periphery of the display panel 100 so that the PBA 400 is a display panel. Without dissipating heat to the 100 , it is possible to further achieve the effect of easily dissipating heat to the front of the display device 10 . In addition, the first heat dissipation plate 510 and the second heat dissipation plate 520 constitute one heat dissipation plate 500 , and the heat dissipation plate 500 is generally disposed outside the periphery of the display panel 100 . Due to this, it is possible to form an effective heat exchange and heat dissipation structure.

In the case of the display device 10 according to another embodiment of the present invention, the second mounting surface 521 of the second heat dissipation plate 520 protrudes forward from the top of the first heat dissipation plate 510 and the second heat dissipation plate 2 mounting surfaces 521 are formed on the upper part of the The light guide plate 200 may extend to the upper end of the LED module 300 mounted on the second mounting surface 521 .

Therefore, unlike the display device 10 according to an embodiment of the present invention, the light guide plate 200 is formed in a rectangular plate shape to correspond to the display panel 100, and the length of the light guide plate 200 in the left and right directions and the length in the vertical direction are It may be formed to correspond to the display panel 100 . This means that the lower portion of the light guide plate 200 corresponding to the above-described distance D may be omitted.

The second heat dissipation plate 520 protruding forward from the top of the first heat dissipation plate 510 may be supported by the adjacent middle mold 710 .

The first heat dissipation plate 510 is disposed at the rear of the display device 10 according to an embodiment of the present invention and may be directly supported by the rear chassis 720 .

When the surface located on one side of the first heat dissipation plate 510 facing the front of the display panel 100 is referred to as the first mounting surface 511 , the first heat dissipation plate 510 facing the rear of the display panel 100 is the The surface located on the other side may be defined as the support part 512 .

The support part 512 is positioned opposite to the first mounting surface 511 and may be formed in a shape corresponding to the first mounting surface 511 . Since the first heat dissipation plate 510 is provided in a rectangular plate shape, the first mounting surface 511 and the support part 512 may also be formed in a rectangular shape.

The support part 512 of the first heat dissipation plate 510 may be provided as a surface directly supported by the above-described rear chassis 720 .

When the second heat dissipation plate 520 protrudes from the top of the first heat dissipation plate 510 toward the front rather than when the second heat dissipation plate 520 protrudes from the lower end of the first heat dissipation plate 510 toward the rear. A more robust heat dissipation structure can be formed.

In the case of the display device 10 according to another embodiment of the present invention, as described above, the rear reflection sheet 610 is disposed behind the light guide plate 200 and covers the rear surface of the light guide plate 200 and is provided to be in contact with the rear surface. may include. However, as can be seen in FIGS. 3 and 7 , since the lower portion of the light guide plate 200 corresponding to distance D does not exist in the case of the display device 10 according to another embodiment of the present invention, the front reflection sheet 620 described above. may be omitted.

Hereinafter, a front cover 800 that can be commonly applied to the embodiments of FIGS. 2 to 9 will be described in detail.

The front cover 800 is provided under the first cover part 810 and the first cover part 810 provided to cover the circumference of the display panel 100 in front of the display panel 100 , and the first cover part It may include a second cover part 820 that protrudes toward the front of the display panel 100 rather than the 810 .

That is, referring to FIGS. 3 and 4 , 7 and 8 , the thickness of the cross-section of the display device 10 is greater than the thickness of the cross-section in the region where the display panel 100 is disposed. The thickness of the cross section in the region may be provided to be thick.

The second cover portion 820 provided under the first cover portion 810 protrudes toward the front of the display panel 100 rather than the first cover portion 810 is the second cover portion 820 and the first It is formed between the heat dissipation plates 510 to form the PBA receiving portion 801 in which the PBA 400 is disposed.

Forming the PBA accommodating part 801, the PBA 400, which was conventionally disposed on the rear of the display panel 100, that is, on the rear of the display device 10, is placed on the front of the display panel 100 together with the heat dissipation plate 500, It is arranged on the outside of the periphery of the display panel 100 so as not to overlap with the rear, but a relatively bulky PBA 400 structure can be accommodated.

The front cover 800 shown in FIGS. 2 to 9 is illustrated in a structure in which the lower portion of the display device 10 protrudes toward the front of the display panel 100 , but is not limited thereto, and the PBA 400 is heat-dissipated. If it can be disposed on the outside of the periphery of the display panel 100 so as not to overlap the front and rear of the display panel 100 together with the plate 500, a structure protruding from the top or both sides of the display device 10 can be formed. may be

The second cover portion 820 of the front cover 800 may include a plurality of holes 821 for communicating the PBA receiving portion 801 and the outside. The plurality of holes 821 may be formed to correspond to positions where the above-described speakers 900 are disposed. Alternatively, as shown in FIGS. 1, 2 and 6 , when the speaker 900 is provided as a bar-shaped speaker, the area in which the plurality of holes 821 are formed corresponds to the front surface of the second cover part 820 . can be formed in

Corresponding to the position where the plurality of holes 821 are formed, since the speaker 900 is disposed in the PBA receiving part 801 , it is possible to achieve an effective sound radiation effect in front of the display device. In addition, in addition to improving the acoustic function, heat radiated from the heat dissipation plate 500 through the plurality of holes 821 may be effectively radiated to the front of the display device 10 .

10 is a diagram schematically illustrating a ground structure of a PBA and a backlight unit of a display device according to an embodiment of the present invention together with circuits.

Hereinafter, a grounding structure that can be commonly applied to the embodiments of FIGS. 2 to 9 will be described in detail.

For example, when a surge voltage generated from the outside is applied to the display device 10 , the performance of the device may be deteriorated. An example of the surge voltage may be a voltage generated by electrostatic discharge (ESD). Such static electricity means static electricity induced by a person or an object. When a high voltage is applied to the display apparatus by static electricity, there is a risk that components inside the display apparatus 10 may be damaged. In particular, when such a high voltage flows into a pixel region displaying an image, a desired image cannot be output to the screen.

Accordingly, the display device 10 may include a configuration that minimizes the possibility that such a surge voltage is introduced into the components inside the display device 10 to damage the components inside the display device 10 .

To this end, in the display device 10 , a ground terminal made of a conductive material may be connected to one surface of the PCB, and the LED cathode G2 may be connected to one surface of the LED substrate 320 .

Hereinafter, a plurality of PCBs on which electronic components such as a timing control unit and a power supply unit for generating a signal voltage necessary for image expression of the display device 10 are mounted will be collectively described as PBA. Also, in describing the grounding structure of FIG. 10 , among various electronic components, a power supply unit, an LED module, and a Driver_Integrated Circuit (D_IC) for driving the LED module will be mainly described.

Referring to FIG. 10 , a circuit for driving the display device 10 includes a primary power supply 1000 that supplies AC or DC power supplied from the outside to the display device, and a primary power source 1000 receiving power from the primary power supply 1000 . LED driving power circuit 1200, driving IC, TV image board and other display device 10 for driving the internal power circuit 1300, LED module 300 and LED module 300 to control the current flowing through It may include an LED driving IC (Driver_Integrated Circuit, D_IC, 1100) for A capacitor Vc for smoothing the ripple voltage supplied from the power supply unit 1300 to the supply voltage of the driving IC may be additionally connected to the driving IC.

The LED module 300 , the LED driving IC 1100 , the LED driving power supply circuit 1200 , and the power circuit 1300 for driving the electronic components inside the display device 10 are displayed due to the surge voltage generated from the outside, respectively. A grounding structure may be provided that minimizes the risk of damage to components inside the device 10 .

The ground terminal of the power circuit 1300 for driving the electronic components inside the display device 10 is G1, the LED cathode (G2) for grounding the LED module 300 is G2, the ground structure of the LED driving power circuit 1200 is G3, and the ground structure of the LED driving IC 1100 is referred to as G4. Hereinafter, for convenience of description, the ground terminal G1 of the power circuit 1300 for driving the electronic component will be described as the ground terminal G1 of the PBA.

The display device 10 according to an embodiment of the present invention may include a metal heat dissipation plate 500 to which the cathode G2 of the LED and the ground terminal G1 of the PBA are connected. In the following description, it will be described with reference to the drawings of FIGS. 2 to 5 . However, it is obvious that the technical idea that the cathode (Cathode, G2) of the LED and the ground terminal (G1) of the PBA are connected to one heat dissipation plate 500 can be equally applied to FIGS. 6 to 9 .

The meaning of being integrally formed means that the first heat dissipation plate 510 and the second heat dissipation plate 520 are physically integrally formed without a gap through a manufacturing method such as a mold in the process of manufacturing the heat dissipation plate 500 Alternatively, it may mean forming a single structure by contacting each other similarly to that shown in FIGS. 2 to 9 .

The first heat dissipation plate 510 including the first mounting surface 511 on which the PBA 400 is mounted may be formed in a rectangular plate shape with left and right widths longer than the vertical length to correspond to the width of the display panel 100 . have. In addition, it is formed of a metal material so that the ground can be effectively grounded at the same time as heat transfer and heat dissipation.

The first heat dissipation plate 510 may be disposed such that the first mounting surface 511 faces the front of the display panel. The second heat dissipation plate 520 of the display apparatus 10 according to an embodiment of the present invention may protrude backward from the lower end of the first heat dissipation plate 510 . The second mounting surface 521 and the second heat dissipation plate 520 on which the LED module 300 is mounted may extend along a direction in which the plurality of LEDs 310 are disposed.

The heat dissipation plate 500 may be disposed in the same manner as that of the heat dissipation plate 500 in the display device 10 described above with reference to FIGS. 2 to 9 .

Similarly, the shape of the front cover may be equally applied to the contents described in relation to the heat dissipation plate 500 .

However, additionally, the front cover may further include a support flange 802 formed of an insulator for supporting the heat dissipation plate 500 . 3 and 4, the support flange 802 of the display device 10 according to an embodiment of the present invention supports the second cover of the front cover to support the lower surface of the second heat dissipation plate 520. It may protrude from the rear surface of the part 820 toward the rear. The support flange 802 of the display device 10 according to another embodiment of the present invention shown in FIGS. 7 and 8 is a second cover part 820 of the front cover 800 to support the lower end of the first heat dissipation plate 510 . ) may protrude from the rear surface toward the rear.

Since the support flange 802 is made of an insulator to support the heat dissipation plate 500 , inconvenience in use such as static electricity that may occur when a user contacts the display device 10 from the outside can be prevented in advance.

The plurality of LEDs 310 may be mounted on one surface of the LED substrate 320 . The LED cathode G2 connected to the LED substrate 320 is finally electrically connected to the heat dissipation plate 500 due to the structure in which the LED substrate 320 is mounted on the second mounting surface 521 of the second heat dissipation plate 520 . It may be provided in a connected state.

The ground terminal G1 of the PBA made of a conductive material may be provided in a state in which the PBA 400 is electrically connected to the heat dissipation plate 500 by being mounted on the first mounting surface 511 of the first heat dissipation plate 510 . have. As a result, the LED cathode G2 and the ground terminal G1 of the PBA may be provided to share the same ground.

Referring to FIG. 10 , the grounding structure of the LED driving power supply unit 1200 is disclosed as G3, and the grounding structure of the LED driving IC 1100 is also disclosed as G4. Similarly, it may be connected to the heat dissipation plate 500 to share the same ground with the LED cathode G2 and the ground terminal G1 of the PBA. Therefore, there is no need to provide a separate ground to discharge the surge voltage. That is, it is possible to omit various conductive wire structures required to construct a separate ground, thereby achieving the effect of simplification of the manufacturing process and reduction of manufacturing cost.

A middle mold ( Together with the 710 , it is possible to provide a rigid reinforcement structure that more firmly supports the internal configuration of the display device 10 . In addition, the heat dissipation plate 500 is provided with a metal material, and the LED cathode (G2) and the ground terminal (G1) of the PBA are connected at the same time to share the same ground structure. In addition to the effect of minimizing the risk of component damage, it is possible to achieve the effect of preventing an overcurrent from flowing between each electronic component due to a difference in reference potential.

In the above, specific embodiments have been shown and described. However, it is not limited only to the above-described embodiments, and those of ordinary skill in the art to which the invention pertains can make various changes without departing from the spirit of the invention described in the claims below. .

Claims

display panel;

a light guide plate disposed behind the display panel;

an LED module including a plurality of LEDs disposed along a side surface of the light guide plate to irradiate light to the light guide plate;

a PBA (Printed Board Assembly) provided for controlling a display device and processing an image; and

Including; a heat dissipation plate on which the LED module is mounted on one side and the PBA is mounted on the other side;

The heat dissipation plate and the PBA are disposed so as not to overlap the front and rear sides of the display panel so that the heat transmitted through the heat dissipation plate and the heat generated from the PBA are provided to be radiated to the front and outside of the periphery of the display panel. .
According to claim 1,

The heat dissipation plate includes a first heat dissipation plate including a first mounting surface on which the PBA is mounted and a second heat dissipation plate including a second mounting surface on which the LED module is mounted, wherein the first mounting surface is a display panel is formed to face the front of the display device and the second mounting surface and the second heat dissipation plate extend along a direction in which the plurality of LEDs are arranged.
3. The method of claim 2,

The first mounting surface is a display device disposed outside the periphery of the display panel.
4. The method of claim 3,

The first mounting surface is disposed under the display panel,

The second heat dissipation plate protrudes backward from a lower end of the first heat dissipation plate, and the second mounting surface is formed on the second heat dissipation plate.
5. The method of claim 4,

The light guide plate extends to an upper end of the LED module mounted on the second mounting surface, and the heat dissipation plate includes a support formed on a surface opposite to the first mounting surface of the first heat dissipation plate, and the support portion is the A display device supporting the front surface of the lower portion of the light guide plate.
6. The method of claim 5,

A rear reflection sheet covering the rear surface of the light guide plate and disposed in contact with the rear surface, and a front reflection sheet disposed always in front of the light guide plate, covering the front surface of the lower portion of the light guide plate, and disposed in contact with the front surface of the lower portion display device.
3. The method of claim 2,

The second heat dissipation plate is disposed outside the circumference of the light guide plate.
8. The method of claim 7,

The second heat dissipation plate is disposed under the light guide plate,

The second heat dissipation plate protrudes forward from an upper end of the first heat dissipation plate, and the second mounting surface is formed on the second heat dissipation plate.
9. The method of claim 8,

The light guide plate extends to an upper end of the LED module mounted on the second mounting surface, and the heat dissipation plate includes a support formed on a surface opposite to the first mounting surface of the first heat dissipation plate, and the support portion is the light guide plate A display device supported by a rear chassis supporting the rear surface of the display device.
10. The method of claim 9,

The rear chassis includes a spacer that protrudes between the light guide plate and the plurality of LEDs from the rear chassis and is provided to support a lower portion of the light guide plate to space the light guide plate and the plurality of LEDs apart.
11. The method of claim 10,

and a rear reflection sheet disposed at a rear side of the light guide plate to cover a rear surface of the light guide plate and to be in contact with the rear surface.
9. The method of any one of claims 4 or 8,

A first cover portion provided to cover the circumference of the display panel from the front of the display panel, and a second cover portion provided under the first cover portion and protruding toward the front of the display panel than the first cover portion The display device further comprising a front cover (Front Cover).
13. The method of claim 12,

The display apparatus further comprising a PBA accommodating part formed between the second cover part and the first heat dissipation plate and in which the PBA is disposed.
14. The method of claim 13,

The second cover part of the front cover includes a plurality of holes for communicating the PBA accommodating part and the outside, and through the plurality of holes, the rows of the PBA accommodating part are provided to flow outwardly in front of the periphery of the display panel. display device.
15. The method of claim 14,

The display device further comprises a speaker disposed in the PBA receiving portion corresponding to the position where the plurality of holes are formed.