KR20160092532A - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display which has an effective heat radiation design by connecting a connecting member to a printed circuit board in a flat type structure. According to features of the present invention, there is provided a protrusion end at one edge of a cover bottom corresponding to one edge to which a printed circuit board of a liquid crystal panel, wherein the protrusion end supports a rear surface of a connecting member which connects the liquid crystal panel to the printed circuit board in a flat type, so that heat having a high temperature and generated from a driving circuit mounted on the connecting member may be radiated rapidly and effectively to an outside. Thus, the durability of the driving circuit may be prevented from being deteriorated so that the reliability of the driving circuit is improved and the picture quality of the liquid crystal display device is prevented from being deteriorated.

Description

[0001] Liquid crystal display device [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device including an effective heat dissipation design of a liquid crystal display device in which a connecting member and a printed circuit board are connected in a flat type structure.

A liquid crystal display device (LCD), which is advantageous for moving picture display and has a large contrast ratio and is actively used in TVs and monitors, exhibits optical anisotropy and polarization properties of a liquid crystal, And the like.

Such a liquid crystal display device has a liquid crystal panel in which a liquid crystal panel is interposed between two adjacent substrates through a liquid crystal layer as an essential component and changes the alignment direction of the liquid crystal molecules in an electric field in the liquid crystal panel to realize a difference in transmittance do.

However, since the liquid crystal panel does not have its own light emitting element, a separate light source is required to display the difference in transmittance as an image. To this end, a backlight having a light source is disposed on the back surface of the liquid crystal panel.

Here, a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp, and a light emitting diode (LED) are used as a light source of the backlight.

In particular, LEDs are widely used as light sources for displays, having characteristics such as small size, low power consumption, and high reliability.

1 is a cross-sectional view of a liquid crystal display device using a general LED as a light source.

A general liquid crystal display device 1 includes a liquid crystal panel 10, a backlight unit 20, a guide panel 30, a cover bottom 50, and a top cover 40.

The liquid crystal panel 10 is constituted by first and second substrates 12 and 14 which are in contact with each other with a liquid crystal layer interposed therebetween, which plays a key role in image display.

A backlight unit 20 is provided behind the liquid crystal panel 10.

The backlight unit 20 includes an LED assembly 29 arranged along the longitudinal direction of at least one edge of the guide panel 30, a white or silver reflective plate 25 seated on the cover bottom 50, 25, and an optical sheet 21 interposed therebetween.

The LED assembly 29 is formed on one side of the light guide plate 23 and includes a plurality of LEDs 29a emitting white light and an LED PCB 29b mounted on the LEDs 29a ).

The liquid crystal panel 10 and the backlight unit 20 are covered with a top cover 40 covering the top edge of the liquid crystal panel 10 with the edges thereof being surrounded by a guide panel 30 having a rectangular frame shape, The cover bottoms 50 covering the back surface are joined at the front and rear sides, respectively, and modularized via the guide panel 30. [

Reference numerals 19a and 19b denote polarizers attached to both surfaces of the liquid crystal panel 10 to control the polarization direction of light.

A printed circuit board (not shown) is connected to the liquid crystal panel 10 via a connection member (not shown) along one edge of the liquid crystal panel 10. The printed circuit board (not shown) And a flat type structure in which a folding type structure in which the liquid crystal panel 10 is brought into close contact with the liquid crystal panel 10 and a connecting member (not shown) and a printed circuit board (not shown) are positioned on the same plane as the liquid crystal panel 10 are formed.

In recent years, such a liquid crystal display device 1 has been widely used, such as a desktop computer monitor and a wall-mounted television, as well as a portable computer, and it has a large display area and has a significantly reduced weight and volume Research is actively underway.

In addition to being lightweight and thin, the liquid crystal display device 1 is also required to have a narrow bezel in which a display area is wide and a bezel area which is a non-display area other than the display area is formed as small as possible.

Thus, by removing the top cover 40 and attaching and fixing the liquid crystal panel 10 to the guide panel 30 through a bonding pad (not shown) such as a double-sided tape, a lightweight, thin and narrow bezel is realized have.

However, when the top cover 40 is removed, a heat radiation design of a driving circuit element (not shown) mounted on a connecting member (not shown) can not be implemented.

That is, in a typical liquid crystal display device 1, a high temperature heat is gradually generated from a driving circuit element (not shown) mounted on a connecting member (not shown) at the time of image display, The lifetime is greatly shortened, reliability is lowered, and signal distortion is generated.

This results in a problem of direct deterioration of image quality.

Particularly, in the case of a flat type in which a connecting member (not shown) and a printed circuit board (not shown) are positioned on the same plane as the liquid crystal panel 10, the above problems are further maximized.

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a liquid crystal display device having a lightweight, thin, and narrow bezel.

A second object of the present invention is to realize an effective heat dissipation design of a driving circuit element mounted on a flat type connecting member.

It is a fourth object of the present invention to improve the reliability of the device as well as the life of the driving circuit device. It is a fourth object of the present invention to prevent the deterioration of image quality of the liquid crystal display device.

In order to achieve the above object, according to the present invention, there is provided a liquid crystal display device comprising: a liquid crystal panel having a printed circuit board connected through a connecting member along at least one edge thereof; a backlight unit positioned below the liquid crystal panel; And a cover bottom having a horizontal surface and a vertically bent side from the edge of the horizontal surface and having a protruding end for supporting a back surface of the connecting member on the side surface corresponding to one edge of the liquid crystal panel, to provide.

At this time, the protruding end is formed of an extension portion that is vertically bent outward from the side edge of the side surface, the side surface is vertically bent outwardly, and the side surface is provided with the groove.

The protruding end is provided with a protruding step. The protruding end has a first end vertically bent from the side surface, a second end vertically bent from the first end, and a second end vertically bent outward from the second end. A fourth end that is vertically bent downward from the third end, and a fifth end that is vertically bent outward from the fourth end.

The first stage and the fifth stage are located on the same plane and are parallel to each other, and the first stage, the third stage, and the fifth stage are offset from each other, and the second stage and the fourth stage And the protruding ends support a part of the back surface of the printed circuit board.

The heat dissipating member may include at least one of copper (Cu), silver (Ag), aluminum (Al), iron (Fe), nickel (Ni), and tungsten Or a heat radiation metal pattern whose outer surface is plated with at least one of nickel (Ni), silver (Ag) and gold (Au), or the heat radiation member is made of a heat radiation pad containing a silicone composition, (Al), graphite, and copper (Cu) is contained in the resin composition containing the heat dissipation pad.

As described above, according to the present invention, on the one edge of the cover bottom corresponding to one edge to which the printed circuit board of the liquid crystal panel is connected, the rear surface of the connecting member, which connects the liquid crystal panel and the printed circuit board in a flat type, Or by locating the projecting step or the heat radiating member on the projecting end, an effective heat dissipating design capable of quickly and effectively dissipating heat generated from the drive circuit elements mounted on the connecting member to the outside Can be implemented.

As a result, the lifetime of the driving circuit element can be prevented from being shortened, reliability of the driving circuit element can be improved, and deterioration of image quality of the liquid crystal display device can be prevented.

Further, when the projecting end is formed by vertically bending the side surface of the cover bottom to the outside, a separate material for forming the projecting end is not required and the material cost can be reduced. In addition, the present invention can be applied to both a liquid crystal display device including a liquid crystal panel in which a connection member and a printed circuit board are connected by a folding type structure and a flat type structure, thereby reducing material cost and improving process efficiency. There is an effect.

1 is a sectional view of a liquid crystal display device using a general LED as a light source.
2 is a perspective view schematically showing a liquid crystal display device according to a first embodiment of the present invention.
3 is a cross-sectional view schematically illustrating a portion of FIG. 2 modularized;
4 and 5 are cross-sectional views schematically showing a part of a modular liquid crystal display device according to a second embodiment of the present invention;
6 is a cross-sectional view schematically showing a part of a modular liquid crystal display device according to a third embodiment of the present invention;

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

- First Embodiment -

2 is a perspective view schematically showing a liquid crystal display device according to a first embodiment of the present invention.

The liquid crystal display 100 according to the first embodiment of the present invention includes a liquid crystal panel 110, a backlight unit 120, a guide panel 130, and a cover bottom 150.

For the sake of convenience, the backlight unit 120 is disposed behind the liquid crystal panel 110 under the assumption that the display surface of the liquid crystal panel 110 faces forward, The cover bottom 150 is positioned on the back surface of the backlight unit 120 in a state where the guide panel 130 having a rectangular shape is wiped.

Let's take a closer look at each of these.

First, the liquid crystal panel 110 plays a key role in image display of a liquid crystal display device. The liquid crystal panel 110 includes a first substrate 112 and a second substrate 114 which are bonded to each other and a liquid crystal layer (Not shown).

Although not shown in the figure, a plurality of gate lines and data lines cross each other on the inner surface of a first substrate 112 called a lower substrate or an array substrate, pixels are defined, and a thin film transistor (TFT) : TFT), and a transparent pixel electrode formed on each pixel and a common electrode are connected.

On the inner surface of the second substrate 114 called an upper substrate or a color filter substrate, color filters of red (R), green (G), and blue (B) And a black matrix for covering the gate lines, the data lines, and the thin film transistors.

Between the first and second substrates 112 and 114 and the liquid crystal layer (not shown), an upper and a lower alignment film (not shown) for determining the initial alignment direction of the liquid crystal are interposed, and the first and second substrates A seal pattern (not shown) is formed along the edges of both substrates 112 and 114 to prevent leakage of a liquid crystal layer (not shown) filled between the substrates 112 and 114.

Polarizing plates 119a and 119b (see FIG. 3) for selectively transmitting only specific light are attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

A printed circuit board 117 is connected to at least one edge of the liquid crystal panel 110 via a flexible circuit board or a connection member 116 such as a tape carrier package (TCP) A plurality of light emitting diodes 116 are connected to the printed circuit board 117 and the liquid crystal panel 110 at predetermined intervals along a longitudinal direction of one edge of the printed circuit board 117 and the liquid crystal panel 110.

The liquid crystal display 100 according to the first embodiment of the present invention is a flat type in which the connecting member 116 and the printed circuit board 117 are located on the same plane as the liquid crystal panel 110, A timing controller, a power supply, a gamma voltage generator, and the like are mounted on the printed circuit board 117 to primarily process various signal information input from an external device such as a computer to generate signal voltages necessary for image display.

On the connection member 116, image signals transferred to the data lines of the liquid crystal panel 110 through the signal voltages transferred from the printed circuit board 117 and the image signals transferred to the gate lines are supplied to the on / off signal, and a gate driver IC such as a gate driver IC are mounted.

Accordingly, when the selected thin film transistor for each gate line is turned on by the on / off signal of the thin film transistor which is transferred to the gate line, the liquid crystal panel 110 supplies the image signal of the data line And the alignment direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode which is generated thereby, and the difference in transmittance is shown.

In the liquid crystal display device 100 according to the present invention, a backlight unit 120 is provided to supply light from the rear surface of the liquid crystal display device 100 so that a difference in transmittance represented by the liquid crystal panel 110 is externally expressed.

The backlight unit 120 includes an LED assembly 129 arranged along at least one longitudinal edge of the cover bottom 150, a reflection plate 125, a light guide plate 123 mounted on the reflection plate 125, And an optical sheet 121 positioned above the light guide plate 123.

The LED assembly 129 is a light source of the backlight unit 120 and is disposed at one side of the light guide plate 123 to face the light incident surface of the light guide plate 123. The LED assembly 129 includes a plurality of LEDs 129a, And a PCB 129b on which a plurality of LEDs 129a are mounted with a predetermined spacing.

The plurality of LEDs 129a emit light having colors of red (R), green (G), and blue (B) toward the front of the light guide plate 123, and the plurality of RGB LEDs 129a ) Can be turned on at once to realize white light by color mixing.

In particular, in recent years, a blue LED 129a including a blue LED chip having excellent luminous efficiency and brightness has been used for improving the luminous efficiency and brightness, and a phosphor such as yttrium aluminum garnet (YAG: Ce) doped with cerium, A blue LED 129a made of a yellow phosphor is used.

The blue light emitted from the LED 129a is transmitted through the phosphor and mixed with the yellow light emitted by the phosphor, thereby realizing white light.

The light guide plate 123 on which the light emitted from the plurality of LEDs 129a is incident is formed so that the light incident from the LED 129a is uniformly spread over a wide area of the light guide plate 123 while traveling inside the light guide plate 123 And provides a surface light source to the liquid crystal panel 110.

The light guide plate 123 may include a pattern of a specific shape on the lower surface to supply a uniform surface light source. The pattern may be formed in various shapes such as an elliptical pattern, a polygon pattern, a hologram pattern, and the like in order to guide light incident into the light guide plate 123. The pattern is formed on the lower surface of the light guide plate 123 by a printing method or an injection method.

The reflection plate 125 is disposed on the back surface of the light guide plate 123 and reflects light passing through the back surface of the light guide plate 123 toward the liquid crystal panel 110 to improve the brightness of light.

The optical sheet 121 on the light guide plate 123 includes a diffusion sheet and at least one light condensing sheet and diffuses or condenses the light passing through the light guide plate 123 to provide a more uniform surface light source to the liquid crystal panel 110 Let it enter.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the guide panel 130 and the cover bottom 150. The guide panel 130 surrounds the edges of the liquid crystal panel 110 and the backlight unit 120 And is seated on the cover bottom 150.

The cover bottom 150 is made of a metal and provides a horizontal surface 151 on which the backlight unit 120 including the liquid crystal panel 110 is mounted to support the entire liquid crystal display 100 and generate light loss The edge of the horizontal plane 151 is vertically bent to form a side surface 153 of the cover bottom 150.

The liquid crystal display 100 according to the first embodiment of the present invention is a liquid crystal display 100 according to the first embodiment of the present invention in which a printed circuit board 117 is connected to a cover bottom 150 corresponding to one edge of a liquid crystal panel 110 connected through a connection member 116 And a protruding end 155 formed at an edge of the side wall 153 and including an extension bent perpendicularly outward from an edge of the side surface 153.

The protruding end 155 supports the back surface of the connecting member 116 connecting the printed circuit board 117 along at least one edge of the liquid crystal panel 110 of the modular liquid crystal display device 110. [

The projecting end 155 of the cover bottom 150 made of a metal supports the back surface of the connecting member 116 so that the high temperature heat generated from the driving circuit device 118 mounted on the connecting member 116 An effective heat dissipation design capable of quickly and effectively dissipating heat to the outside is realized.

Let's take a closer look at this later.

Here, the guide panel 130 may be referred to as a support main or main support, or a mold frame, and the cover bottom 150 may be referred to as a bottom cover or a bottom cover.

Here, the liquid crystal display 100 of the present invention can be thin and lightweight by omitting the top cover (40 in Fig. 1) which was located in front of the liquid crystal panel 110, Resulting in simplification. Also, the process cost can be reduced.

In addition to being lightweight and thin, the display area is expanded by omitting the top cover (40 in Fig. 1), and at the same time, a bezel area, which is a non-display area other than the display area, is narrowed to have a narrow bezel Device 100 may be provided.

As described above, the liquid crystal display 100 according to the first embodiment of the present invention is mounted on one edge of the cover bottom 150 corresponding to one edge to which the printed circuit board 117 of the liquid crystal panel 110 is connected And a protruding end 155 that supports the rear surface of the connecting member 116 that connects the liquid crystal panel 110 and the printed circuit board 117 in a flat type and which is mounted on the connecting member 116 It is possible to realize an effective heat dissipation design capable of quickly and effectively dissipating heat of high temperature generated from the drive circuit elements 118 to the outside.

This can prevent the lifespan of the drive circuit element 118 from being shortened, improve the reliability of the drive circuit element 118, and prevent degradation of image quality of the liquid crystal display device 100 have.

Fig. 3 is a cross-sectional view schematically showing a part of Fig. 2 modularized.

An LED assembly 129 including a reflection plate 125, a light guide plate 123, a PCB 129b on which the LED 129a and the LED 129a are mounted, and a light guide plate 123 on the light guide plate 123, 121 are stacked to form a backlight unit (120 of FIG. 2).

A liquid crystal panel 110 in which a liquid crystal layer (not shown) is interposed between the first and second substrates 112 and 114 and the first and second substrates 112 and 114 is disposed on the backlight unit 120 Polarizing plates 119a and 119b selectively transmitting only specific light are attached to the outer surfaces of the substrates 112 and 114, respectively.

The printed circuit board 117 is connected to at least one edge of the liquid crystal panel 110 through the connecting member 116 having the driving circuit element 118 mounted thereon. 117 are of a flat type, which is flush with the liquid crystal panel 110.

The backlight unit 120 and the liquid crystal panel 110 are edge-mounted by the guide panel 130 and are placed on the horizontal surface 151 of the cover bottom 150 to be modularized.

The projecting end of the cover bottom 150 corresponding to one edge of the flat type liquid crystal panel 110 to which the printed circuit board 117 is connected is vertically bent outward from the side face 153, The liquid crystal panel 110 in which the edges are surrounded by the guide panel 130 on the horizontal surface 151 of the cover bottom 150 is formed on the protruding end 155 of the connection member 116 .

That is, the cover bottom 150 includes a horizontal surface 151 and a side surface 153 formed by vertically bending the edge of the horizontal surface 151. At this time, the edge of the liquid crystal panel 110, to which the printed circuit board 117 is connected, And a protruding end 155 formed by an extension of the side edge 153 of the side cover 153 to be vertically bent.

At this time, the projecting end 155 is vertically bent outward from the edge of the side surface 153, and is offset from the horizontal surface 151 of the cover bottom 150 without facing each other.

The connecting member 116 connected to the liquid crystal panel 110 which is surrounded by the guide panel 130 and is mounted on the horizontal surface 151 of the cover bottom 150 may be a flat type liquid crystal panel 110, So that they are seated on the protruding end 155.

The connection member 116 is seated on the protruding end 155 so that the high temperature heat is generated from the driving circuit element 118 mounted on the connecting member 116 through the protruding end 155 Is transmitted to the cover valve 150, and is quickly and effectively discharged to the outside.

That is, in the process of realizing an image in the liquid crystal panel 110, heat of high temperature is gradually generated from the driving circuit elements 118 mounted on the connecting member 116, Which causes problems such as shortening of the image quality or signal distortion. This results in lowering the image quality of the liquid crystal panel 110, thereby causing a reduction in reliability.

At this time, the connection member 116 is seated on the protruding end 155 of the cover bottom 150 made of a metal, so that the high temperature heat generated from the driving circuit element 118 is transferred to the protruding end 155, So that the heat can be radiated to the outside quickly and effectively.

This can prevent the life of the driving circuit element 118 mounted on the connecting member 116 from being greatly shortened, as well as the problem that reliability such as signal distortion is lowered.

- Second Embodiment -

4 and 5 are cross-sectional views schematically showing a part of a modular liquid crystal display device according to a second embodiment of the present invention.

An LED assembly 129 including a reflection plate 125, a light guide plate 123, a PCB 129b on which the LED 129a and the LED 129a are mounted, and a light guide plate 123 on the light guide plate 123, 121 are stacked to form a backlight unit (120 of FIG. 2).

A liquid crystal panel 110 in which a liquid crystal layer (not shown) is interposed between the first and second substrates 112 and 114 and the first and second substrates 112 and 114 is disposed on the backlight unit 120 Polarizing plates 119a and 119b selectively transmitting only specific light are attached to the outer surfaces of the substrates 112 and 114, respectively.

The printed circuit board 117 is connected to at least one edge of the liquid crystal panel 110 through the connecting member 116 having the driving circuit element 118 mounted thereon. 117 are of a flat type, which is flush with the liquid crystal panel 110.

The backlight unit 120 and the liquid crystal panel 110 are edge-mounted by the guide panel 130 and are placed on the horizontal surface 151 of the cover bottom 150 to be modularized.

The liquid crystal display 100 according to the second embodiment of the present invention includes a cover bottom 150 having a horizontal surface 151 and a side surface 153 with a vertically bent edge of the horizontal surface 151, A projecting end 155 protruding outward from the side surface 153 is provided at one edge of the cover bottom 150 corresponding to one edge of the liquid crystal panel 110 to which the substrate 117 is connected.

The protruding end 155 is formed by vertically bending the side face 153 outwardly and a groove 157 corresponding to the length of the protruding end 155 is formed on one edge of the cover bottom 150 provided with the protruding end 155 .

And the protruding end 155 has a first end 155a perpendicular to the side surface 153 and a second end 155b that is vertically bent upward from the first end 155a and a second end 155b that is vertically bent from the second end 155b, A fourth stage 155d bent downward from the third stage 155c and a fifth stage 155e bent vertically outward from the fourth stage 155d.

At this time, the first end 155a and the fifth end 155e are located in parallel with each other, and the first end 155a, the third end 155c, and the fifth end 155e face each other So that it is displaced. And the second stage 155b and the fourth stage 155d are opposed to each other so as to face each other.

That is, on the protruding end 155 protruding outward from the side surface 153, protruding protrusions 158 protruding from the second end 155b, the third end 155c and the fourth end 155d are protruded.

When the protruding step 158 is provided on the protruding end 155 as described above, the protruding protrusion 158 is connected to the liquid crystal panel 110 which is surrounded by the guide panel 130 and rests on the horizontal surface 151 of the cover bottom 150 The connection member 116 is flat and connected to the liquid crystal panel 110 in the same plane so that the connection member 116 is seated on the protrusion 158 of the protrusion 155.

The connection member 116 is seated on the protrusion 158 so that the high temperature heat is generated from the driving circuit element 118 mounted on the connecting member 116 through the protrusion 158 Is transmitted to the cover valve 150, and is quickly and effectively discharged to the outside.

This can prevent the life of the driving circuit element 118 mounted on the connecting member 116 from being greatly shortened, as well as the problem that reliability such as signal distortion is lowered.

In the liquid crystal display device 100 according to the second embodiment of the present invention, the projecting end 155 is formed so that the side surface 153 of the cover bottom 150 is vertically bent outward, There is no need for a separate material to form the material, and the material cost can be reduced.

The cover bottom 150 according to the second embodiment of the present invention may have a folding type structure and a flat type structure in which the projecting end 155 is formed through a part of the side surface 153 of the cover bottom 150, the present invention can be applied to the liquid crystal display device 100 including the liquid crystal panel 110 in which the connecting member 116 and the printed circuit board 117 are connected by a flat type structure.

That is, when the connection member 116 connected to one edge of the liquid crystal panel 110 and the printed circuit board 117 are connected by a flat type structure, a part of the side surface 153 is vertically bent outwardly, It is possible to realize an effective heat dissipation design of the driving circuit element 118 mounted on the connecting member 116. In addition, when the connecting member and the printed circuit board are connected in a folding type, It is possible to realize an effective heat dissipation design of the driving circuit element mounted on the connecting member connected in a folding type by forming the side end 153 directly on the side surface 153 without vertically bending the side surface of the side surface 153 .

This can improve the efficiency of the process while reducing material costs.

5, by forming the projecting end 155 to support a part of the back surface of the printed circuit board 117, the high-temperature heat generated from the printed circuit board 117 is also transferred through the projecting end 155 It can quickly and efficiently radiate heat to the outside.

Also, by supporting the printed circuit board 117 through the protruding end 155, the sagging of the printed circuit board 117 can be prevented, and the modularization process of the liquid crystal display device 100 can be more easily performed.

- Third Embodiment -

6 is a cross-sectional view schematically showing a part of a modular liquid crystal display device according to a third embodiment of the present invention.

An LED assembly 129 including a reflection plate 125, a light guide plate 123, a PCB 129b on which the LED 129a and the LED 129a are mounted, and a light guide plate 123 on the light guide plate 123, 121 are stacked to form a backlight unit (120 of FIG. 2).

A liquid crystal panel 110 in which a liquid crystal layer (not shown) is interposed between the first and second substrates 112 and 114 and the first and second substrates 112 and 114 is disposed on the backlight unit 120 Polarizing plates 119a and 119b selectively transmitting only specific light are attached to the outer surfaces of the substrates 112 and 114, respectively.

The printed circuit board 117 is connected to at least one edge of the liquid crystal panel 110 through the connecting member 116 having the driving circuit element 118 mounted thereon. 117 are of a flat type, which is flush with the liquid crystal panel 110.

The backlight unit 120 and the liquid crystal panel 110 are edge-mounted by the guide panel 130 and are placed on the horizontal surface 151 of the cover bottom 150 to be modularized.

In the liquid crystal display 100 according to the third embodiment of the present invention, the cover bottom 150 includes a horizontal surface 151 and a side surface 153 in which the edge of the horizontal surface 151 is vertically bent, A projecting end 155 protruding outward from the side surface 153 is provided at one edge of the cover bottom 150 corresponding to one edge of the liquid crystal panel 110 to which the substrate 117 is connected.

The protruding end 155 is formed by vertically bending the side face 153 outwardly and a groove 157 corresponding to the length of the protruding end 155 is formed on one edge of the cover bottom 150 provided with the protruding end 155 .

A heat radiation member 159 is disposed on the protruding end 155.

The heat radiating member 159 is made of any one of copper (Cu), silver (Ag), aluminum (Al), iron (Fe), nickel (Ni) and tungsten And the outer surface may be formed of a metal material of any one of nickel (Ni), silver (Ag), and gold (Au), or a heat dissipation metal pattern that can be plated with an alloy material containing at least one of them.

The heat transfer pads may be formed of aluminum (Al), graphite, copper (copper), or the like. The heat transfer pads may be formed of a heat dissipation pad having a heat conductive filler in a resin composition such as epoxy. Cu) or the like, which is excellent in thermal conductivity.

As described above, when the heat radiating member 159 is provided on the protruding end 155, it is connected to the liquid crystal panel 110, which is surrounded by the guide panel 130 and seated on the horizontal surface 151 of the cover bottom 150 The connection member 116 is flat and connected to the liquid crystal panel 110 in the same plane so that the connection member 116 is seated on the heat radiating member 159 of the protruding end 155.

When the connection member 116 is placed on the radiation member 159 and the high temperature heat is generated from the driving circuit member 118 mounted on the connection member 116, the high-temperature heat is transmitted through the radiation member 159 Is transmitted to the cover valve 150, and is quickly and effectively discharged to the outside.

This can prevent the life of the driving circuit element 118 mounted on the connecting member 116 from being greatly shortened, as well as the problem that reliability such as signal distortion is lowered.

In the liquid crystal display device 100 according to the third embodiment of the present invention, the projecting end 155 is formed so that the side surface 153 of the cover bottom 150 is vertically bent outward, There is no need for a separate material to form the material, and the material cost can be reduced.

The cover bottom 150 according to the third embodiment of the present invention is configured to have a folding type structure and a flat type structure in which the protruding end 155 is formed through a part of the side surface 153 of the cover bottom 150, the present invention can be applied to the liquid crystal display device 100 including the liquid crystal panel 110 in which the connecting member 116 and the printed circuit board 117 are connected by a flat type structure.

This can improve the efficiency of the process while reducing material costs.

The liquid crystal display 100 according to the third embodiment of the present invention may be mounted on one edge of the cover bottom 150 corresponding to one edge to which the printed circuit board 117 of the liquid crystal panel 110 is connected And a protruding end 155 for supporting the rear surface of the connection member 116 connecting the liquid crystal panel 110 and the printed circuit board 117 in a flat type. It is possible to realize an effective heat dissipation design capable of quickly and effectively dissipating heat generated from the driving circuit elements 118 mounted on the connecting member 116 to the outside.

This can prevent the lifespan of the drive circuit element 118 from being shortened, improve the reliability of the drive circuit element 118, and prevent degradation of image quality of the liquid crystal display device 100 have.

Further, since the projecting end 155 is formed so that the side surface 153 of the cover bottom 150 is vertically bent outwardly, a separate material for forming the projecting end 155 is not required, The cover bottom 150 according to the third embodiment of the present invention has a folding type structure and a flat type structure and the connecting member 116 and the printed circuit board 117 are connected to each other The present invention can be applied to the liquid crystal display device 100 including the liquid crystal panel 110.

This can improve the efficiency of the process while reducing material costs.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

110: liquid crystal panel (112, 114: first and second substrates)
116: connecting member (118: driving circuit element)
117: printed circuit board
119a and 119b: first and second polarizing plates
121: Optical sheet
123: light guide plate
125: reflector
129: LED assembly (129a: LED, 129b: PCB)
130: Guide panel
150: cover bottom (151: horizontal plane, 153: side, 155: protruding end)

Claims (10)

A liquid crystal panel connected to the printed circuit board via at least one connecting member along one edge;
A backlight unit positioned below the liquid crystal panel;
And a protruding end that is positioned below the backlight unit and includes a horizontal surface and a side surface that is vertically bent from the edge of the horizontal surface and that supports the back surface of the connection member on the side surface corresponding to one edge of the liquid crystal panel Cover bolt
And the liquid crystal display device.
The method according to claim 1,
And the protruding end comprises an extension portion that is vertically bent outward from an edge of the side surface.
The method according to claim 1,
Wherein the protruding end is vertically bent outward on the side surface, and the groove is provided on the side surface.
The method of claim 3,
And a projecting step is provided on the projecting end.
The method of claim 3,
The protruding end has a first end vertically bent from the side surface, a second end vertically bent from the first end, a third end vertically bent outward from the second end, and a third end vertically bent from the third end, And a fifth stage that is vertically bent outward from the fourth stage.
6. The method of claim 5,
Wherein the first end and the fifth end are disposed in parallel with each other and are coplanar with each other, the first end, the third end, and the fifth end are offset from each other, and the second end and the fourth end face each other And the liquid crystal display device.
The method of claim 3,
And the protruding end supports a part of the back surface of the printed circuit board.
The method of claim 3,
And a heat radiation member is provided on the projecting end.
9. The method of claim 8,
The heat dissipating member may include at least one of copper (Cu), silver (Ag), aluminum (Al), iron (Fe), nickel (Ni), and tungsten (W) (Ag), and gold (Au).
9. The method of claim 8,
The heat dissipation member may be a heat dissipation pad including a silicone composition or may be a liquid crystal display device comprising a heat dissipation pad in which a heat transfer filler containing aluminum (Al), graphite, and copper (Cu) .

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