KR20150136332A - Backlight unit - Google Patents

Abstract

According to an embodiment of the present invention, a backlight unit comprises: a bottom cover with a case top inserting unit; and a case top with a bottom cover coupling unit. The case top inserting unit comprises: a bottom cover coupling unit hole; and a hook part formed on the bottom cover coupling unit hole. The bottom cover coupling unit is coupled to the hook part.

Description

Backlight unit {BACKLIGHT UNIT}

The present invention relates to a backlight unit.

BACKGROUND ART In general, a liquid crystal display (LCD) displays a desired image by adjusting the light transmittance of liquid crystal cells arranged in a matrix according to image signal information. Thereby forming an image on the panel.

The liquid crystal display device using such a principle has been gradually widened due to features such as light weight, thinness, and low power consumption driving.

In accordance with this trend, liquid crystal display devices are used in office automation equipment, audio / video equipment, and the like.

In such a liquid crystal display device, a light transmission amount is adjusted according to a signal applied to a plurality of control switches arranged in a matrix form to display a desired image on a screen.

2. Description of the Related Art In recent years, liquid crystal display devices have been extensively applied to computer monitors, televisions, display devices of vehicle navigator systems, and portable display devices such as notebook computers and cellular phones.

Since most of the liquid crystal display devices described above are non-emissive type display devices that display an image by adjusting the amount of a light source coming from the outside, a backlight unit including a separate light source for irradiating light to the liquid crystal display panel need.

At this time, the backlight unit includes an LED element as a light source, a light guide plate coupled with a light exit surface of the LED element, a plurality of sheets provided on the upper side of the light guide plate, and a guide panel .

Recently, it is required to develop a flat-type display device of a clear borderless design in which a border between the image display screen and the outer case is not formed due to various demands of consumers who are interested in design and are seeking a lightweight thin shape .

In order to realize a clear borderless design, a liquid crystal display device in which a middle cabinet and a bottom cover are assembled is generally introduced. However, such a liquid crystal display device has a problem in that the number of parts is increased and the investment cost for parts is increased because the parts are assembled separately.

Embodiments of the present invention can provide a backlight unit capable of reducing the number of parts and simplifying the structure of the backlight unit.

In addition, embodiments of the present invention may provide a backlight unit capable of reducing the development cost through part deletion.

The embodiments of the present invention may also provide a backlight unit capable of realizing a Narrow Bezel by minimizing a non-display area exposed to an external appearance.

A backlight unit according to an embodiment of the present invention includes a bottom cover having a case top insertion portion; And a bottom cover fastening portion, wherein the case top insertion portion includes a bottom cover fastening hole and a hook portion formed in the bottom cover fastening hole, and the bottom cover fastening portion is fastened to the hook portion.

In the backlight unit according to the embodiment of the present invention, the case top further includes a screw fastening portion, the case top inserting portion further includes a screw fastening portion insertion groove, and the screw fastening portion includes a backlight unit.

In the backlight unit according to the embodiment of the present invention, the backlight unit further includes a liquid crystal panel and a panel fixing part coupled to the liquid crystal panel, wherein the case top further comprises a panel fastening part, The backlight unit of claim 1, further comprising a panel fastening portion insertion hole, wherein the panel fastening portion is coupled to the panel fixing portion through the panel fastening portion insertion hole.

In the backlight unit according to the exemplary embodiment of the present invention, the panel fixing portion includes a main support portion disposed at a rear edge of the liquid crystal panel, and a sub support portion formed at the main support portion and engaged with the panel fastening portion.

In the backlight unit according to the embodiment of the present invention, the main support portion includes a plurality of sub support portions.

In the backlight unit according to the embodiment of the present invention, the main support portion includes first to third main support portions disposed on the upper side, left side, and right side of the back surface of the liquid crystal panel, respectively, and separated from each other.

In the backlight unit according to the embodiment of the present invention, the case top includes a body portion facing the side surface of the bottom cover, and the bottom cover fastening portion is formed on the body portion.

In the backlight unit according to the embodiment of the present invention, the case top has a body portion facing the side surface of the bottom cover, and the screw fastening portion is formed on the body portion.

In the backlight unit according to the embodiment of the present invention, the case top includes a body portion facing the side surface of the bottom cover, and the panel fastening portion is formed on the body portion.

In the backlight unit according to the embodiment of the present invention, the body portion includes a first body portion corresponding to a left side surface of the bottom cover, a second body portion corresponding to a right side surface of the bottom cover, and a second body portion corresponding to an upper side surface of the bottom cover And a third body portion, wherein the first to third body portions are separated from each other.

In the backlight unit according to the embodiment of the present invention, the body portion includes an upper hemming portion and a lower hemming portion.

In the backlight unit according to the embodiment of the present invention, the bottom cover has a plurality of case tower insertion portions.

In the backlight unit according to the embodiment of the present invention, the side surface of the bottom cover faces the side surface of the liquid crystal panel.

According to the embodiment of the present invention, by changing the structure of the bottom cover and the case top, the clear borderless design can be realized by partially overlapping functions and roles, and at the same time, And it is possible to simplify development and reduce costs through elimination of parts.

1 is a perspective view of a backlight unit according to an embodiment of the present invention.
2 is a perspective view of a bottom cover according to an embodiment of the present invention.
3 is a perspective view when the guide cover and the optical member are accommodated in the bottom cover.
Fig. 4 is an enlarged view of the case top insertion portion of the bottom cover. Fig.
5 is a perspective view of a case top according to an embodiment of the present invention.
6 is a perspective view showing a case top insertion portion and a case top of the bottom cover.
7 is an enlarged view of the dotted line portion A in Fig.
8 is a perspective view showing a panel according to an embodiment of the present invention.
Fig. 9 is an enlarged view of the panel fixing portion in which the dotted line portion A in Fig. 8 is enlarged.
FIG. 10 is a view showing a panel and a panel fixing part, and a panel fixing part separated from the panel. FIG.
11 is a cross-sectional view of the backlight unit, taken along the line AB in FIG. 7.
12 is a cross-sectional view of the backlight unit, taken along line CD in Fig.
FIG. 13 is a cross-sectional view of the backlight unit, taken along the line EF in FIG. 7; FIG.

Hereinafter, a backlight unit according to an embodiment of the present invention will be described in detail with reference to the drawings. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the size and thickness of an apparatus may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

1 is a perspective view of a backlight unit according to an embodiment of the present invention.

A direction is referred to as an upper direction (bottom surface to top surface direction) of the backlight unit 100, a b direction is an upper side direction of the backlight unit 100, a c direction is a right side direction of the backlight unit 100, The direction of the lower side of the backlight unit 100 and the direction of the side of the backlight unit 100 are defined as the left side direction of the backlight unit 100.

In the following description of the present invention, the expression for direction will be described based on the arrangement of the present invention as shown in FIG.

Referring to FIG. 1, a backlight unit 100 according to an embodiment of the present invention includes a bottom cover 1000, a light source 2000, a guide panel 3000, an optical member 4000, a case top 5000, Down 6000, and panel 7000. [

The bottom cover 1000, the guide panel 3000, the case top 5000 and the case top down 6000 may be made of a plastic material such as a PC material or a metal material.

The bottom cover 1000 may house the light source 2000, the optical member 4000, and the panel 7000. The light source 2000, the optical member 4000, and the panel 7000 can be fixed together with the bottom cover 1000, the guide panel 3000, and the case top 5000 and the case top down 6000 .

The panel 7000 includes a liquid crystal panel 7100, a PCB (Printed Circuit Board) 7200 for driving the liquid crystal panel 7100 and a liquid crystal panel 7100 capable of providing a signal from the PCB 7200 to the liquid crystal panel 7100 And an FPC (Flexible Printed Circuit) 7300 that provides an electrical path.

Further, the panel 7000 may include a panel fixing portion 7400 at the rear edge thereof.

The liquid crystal panel 7100 may include a color filter array substrate, a thin film transistor array substrate, and a liquid crystal layer interposed therebetween.

Although not shown in the drawing, the liquid crystal panel 7100 includes front polarizers attached to the front surface of the color filter array substrate and the back surface of the thin film transistor array substrate, respectively, so that light transmitted through the liquid crystal panel 7100 is cross- And may further include a polarizing plate.

In this liquid crystal panel 7100, liquid crystal cells constituting pixel units are arranged in a matrix form, and the liquid crystal cells adjust the light transmittance according to the image signal information transmitted from the PCB 7200 to form an image.

A plurality of gate lines and a plurality of data lines are formed in a matrix on the thin film transistor array substrate, and a thin film transistor (TFT) is formed at an intersection of the gate line and the data line.

The signal voltage transmitted from the PCB 7200 is applied between the pixel electrode and a common electrode of a color filter array substrate to be described later through the thin film transistor and the liquid crystal between the pixel electrode and the common electrode is aligned according to the signal voltage, It is decided.

The light source 2000 may be a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), or a light emitting diode (LED) A diode device (LED device) is applied as an example. In addition, the light source 2000 may include an LED element and a substrate on which the LED element is mounted.

The optical member 4000 may include a plurality of optical sheets 4002, 4003, 4004, 4005 and a light guide plate 4001.

The plurality of optical sheets 4002, 4003, and 4004 may include a diffusion sheet 4002, a prism sheet 4003, a protective sheet 4004, and a reflective sheet 4005. In some cases, it may be provided with two diffusion sheets, two prism sheets and a reflective sheet. At this time, the diffusion sheet 4002 may include a base plate and a bead coating layer formed on the base plate.

The diffusion sheet 4002 diffuses light from the light source 2000 and supplies the light to the liquid crystal panel 7100. Two or three sheets of the diffusion sheet 4002 may be used in a stacked manner.

In addition, the prism sheet 4003 may have a triangular columnar prism with a predetermined arrangement on the upper surface. The prism sheet 4003 may function to condense the light diffused in the diffusion sheet 4002 in a direction perpendicular to the plane of the upper liquid crystal panel 7100.

Normally, two prism sheets 4003 can be used, and the micro prisms formed on each prism sheet 4003 form a predetermined angle. Therefore, the light passing through the prism sheet 4003 is almost vertically propagated to provide a uniform luminance distribution. The protective sheet 4004 positioned at the uppermost position can protect the prism sheet 4003 which is weak against the scratch.

The reflective sheet 4005 reflects a part of light emitted to the lower portion of the light guide plate 4001 by the light guide plate 4001 to increase the light efficiency and adjust the reflection amount of the entire incident light so that the entire light output surface has a uniform luminance distribution. can do.

The light guide plate 4001 is disposed on the back of the liquid crystal panel 7100 and guides the light generated from the light source 2000 to the back surface of the liquid crystal panel 7100.

As the material of the light guide plate 4001, PMMA (Polymethylmethacrylate) which has high strength and is not easily deformed or broken and has good transmittance can be used. Here, the light guide plate 4001 may be a wedge whose lower surface is inclined and whose upper surface is flat, or a plate type whose lower surface and upper surface are all parallel.

A wedge-shaped light guide plate 4001 may be applied to a liquid crystal display device such as a notebook PC or a mobile phone, and a light source 6000 may be provided on a thick side wall.

FIG. 2 is a perspective view of a bottom cover according to an embodiment of the present invention, and FIG. 3 is a perspective view of the bottom cover when the guide panel and the optical member are accommodated. And Fig. 4 is an enlarged view of the case top insertion portion of the bottom cover.

2 and 3, the bottom cover 1000 may have a rectangular box shape with an open top.

A guide panel insertion groove 1100 into which the guide panel 3000 can be inserted may be formed in an edge region of the bottom cover 1000 and a case top insertion portion 1100, The second electrode layer 1200 may be formed.

When the guide panel 3000 is inserted into the guide panel insertion groove 1100 as shown in FIG. 3, the lower side of the guide panel 3000 in the e direction can be exposed, and the side surfaces in the directions f, c and b And can be completely inserted into the guide panel insertion groove 1100.

The case top down 6000 may be configured to cover the bottom surface of the guide panel 3000 after the guide panel 3000 is coupled to the bottom cover 1000. [ A PCB 7200 may be disposed between the case top down 6000 and the bottom surface of the guide panel 3000.

Referring to FIG. 4, the case top insertion portion 1200 formed on the side surface of the bottom cover 1000 may be formed in a plurality of b, c, and f side surfaces of the bottom cover 1000. In this case, the number of the case top inserting parts 1200 may vary according to the size of the backlight unit 100.

The case top insertion portion 1200 may include a panel fastening portion insertion hole 1210, a bottom cover fastening portion insertion hole 1220, and a screw fastening portion insertion groove 1230.

The bottom cover fastening portion insertion hole 1220 may include a hole 1221 and a hook portion 1222.

The panel fastening portion insertion hole 1210 and the bottom cover fastening portion insertion hole 1220 may be arranged in the same straight line, but the present invention is not limited thereto.

The screw fastening portion insertion groove 1230 may be formed in a region adjacent to the panel fastening portion insertion hole 1210 and the bottom cover fastening portion insertion hole 1220 in the side region of the bottom cover 1000, And may be formed in a region below the panel fastening portion insertion hole 1210 and the bottom cover fastening portion insertion hole 1220.

On the other hand, referring to FIG. 4, a screw insertion groove 1310 may be formed on the edge inclined surface of the bottom surface of the bottom cover 1000. A screw (not shown) may be inserted into the screw insertion groove 1310. When the case top 5000 is coupled to the bottom cover 1000, the screw may fix the case top 5000 and the bottom cover 1000 together.

FIG. 5 is a perspective view of a case top according to an embodiment of the present invention, FIG. 6 is a perspective view showing a case top insertion portion and a case top of a bottom cover, and FIG. 7 is an enlarged view of a dotted line portion A of FIG. .

5 to 7, the case top 5000 may include a plurality of the case tops 5000 and may be disposed on the left side, the right side, and the upper side of the backlight unit 1000, respectively.

Specifically to the left side, the right side and the upper side of the bottom cover 1000, respectively.

The case top 5000 may include a bar shaped body portion 5100, a panel fastening portion 5200, a bottom cover fastening portion 5300, a screw fastening portion 5400, and a hemming portion 5500. have.

The body 5100 includes a first body 5101 disposed on the right side of the bottom cover 1000, a second body 5102 disposed on the left side of the bottom cover 1000, And a third body 5103 disposed on the upper side of the first body 5101. The first body 5101, the second body 5102, and the third body 5103 may be formed independently of each other.

The hemming unit 5500 may include an upper hemming unit 5510 formed on the upper edge of the body 5100 and a lower hemming unit 5520 formed on the lower edge of the body 5100.

The upper hemming portion 5510 folds the upper edge region of the body portion 5100 in the direction f and further folds in the direction d to bring the folded region back into contact with the body portion 5100 so that the upper hemming portion 5510 is formed .

The lower hemming portion 5520 folds the lower edge region of the body portion 5100 in the direction f and then folds in the direction a again to bring the folded region back into contact with the body portion 5100 so that the lower hemming portion 5520 is formed .

The body portion 5100 may be divided into a region where the hemming portion 5500 is formed and a region where the hemming portion 5500 is not formed. At this time, the panel fastening part 5200, the bottom cover fastening part 5300 and the screw fastening part 5400 correspond to the boundary between the area where the hemming part 5500 is formed and the area where the hemming part 5500 is not formed .

Specifically, the case top 5000 is formed by cutting a panel fastening part 5200, a bottom cover fastening part 5300, and a screw fastening part 5400 connected to the body part 5100 to a flat plate made of plastic or metal, The upper hemming portion 5510 can be formed by bending the panel fastening portion 5200 and the bottom cover fastening portion 5300 in the direction d from the direction f to the direction f again so that the screw fastening portion 5400 can be bent in the direction f and then the lower hemming portion 5520 is formed while bending in the direction a again to the direction f, so that the final shape as shown in FIG. 7 can be obtained.

The panel fastening part 5200 may include a first area 5210 extending from the body part 5100 and a second area 5220 extending in the f direction from the first area 5210. The first region 5210 and the second region 5220 may be integrally formed, may have a plate shape, and may be perpendicular to the body portion 5100.

The panel fastening portions 5210 and 5200 may have a shape corresponding to the panel fastening portion insertion hole 1210 of the bottom cover 1000.

The panel fastening part 5200 may be inserted into the panel fastening part insertion hole 1210 of the bottom cover 1000 and may be engaged with the panel fastening part 7400 of the panel 7000.

The bottom cover fastening portion 5300 may include a bottom cover fastening hole 5310.

The bottom cover fastening part 5300 is inserted into the hole 1221 of the bottom cover fastening part insertion hole 1220 of the bottom cover 1000 and is fastened to the hook part 1222 of the bottom cover fastening part insertion hole 1220 Can be combined.

The hook portion 1222 of the bottom cover fastening portion insertion hole 1220 is inserted into the bottom cover fastening hole 5310 of the bottom cover fastening portion 5300 so that the case top 5000 and the bottom cover 1000 Can be fastened to each other.

The screw fastening portion 5400 may have a straight shape with the body portion 5100 and a surface facing the bottom cover 1000. The screw fastening portion 5400 may have a rectangular or polygonal shape, Or the like.

The screw fastening portion 5400 may include a screw fastening hole 5410.

The screw fastening hole 5410 may have a female screw shape corresponding to the screw so that a screw (not shown) can be fastened.

The screw fastening portion 5400 can be inserted into the screw fastening portion insertion groove 1230 of the bottom cover 1000. [

The number of the panel fastening portions 5200, the bottom cover fastening portions 5300 and the screw fastening portions 5400 formed in the case top 5000 is larger than the number of the case top inserting portions 1200 formed in the bottom cover 1000 .

FIG. 8 is a perspective view showing a panel according to an embodiment of the present invention, and FIG. 9 is an enlarged view of a panel fixing portion in which a dotted line portion A in FIG. 8 is enlarged. FIG. 10 is a view showing a panel and a panel fixing part, and a panel fixing part separated from the panel. FIG.

8 to 10, the panel fixing part 7400 includes a main supporting part 7410 and a sub supporting part 7420, a left supporting part 7430, a right supporting part 7440 and an upper supporting part 7450 can do.

The main support part 7410 may be a bar shape and the main support part 7410 may include first to third main support parts to define an upper edge area in the back edge area of the liquid crystal panel 7100, Area and the right-side edge area, respectively.

One side of the main support portion 7410 may be attached to the back edge region of the liquid crystal panel 7100, and the other side may be provided with a sub support portion. Specifically, the lower supporting portion 7420 may be disposed on the other surface of the main supporting portion 7410.

The lower support portion 7420 may be disposed on the other surface of the main support portion 7410 and the left and right support portions 7430 and 7440 may be formed in a columnar shape at both ends of the lower support portion 7420 .

The upper support portion 7450 connects the upper surfaces of the left and right support portions 7430 and 7440 to each other and can face the lower support portion 7420 in a spaced relation to each other.

The lower support portion 7420, the left support portion 7430, the right support portion 7440, and the upper support portion 7450 may be integrally formed.

 The sub supports may form a hole 7460 through which the second area 5220 of the panel fastening part 5200 of the case top 5000 can be inserted.

The first region 5210 of the panel fastening portion 5200 of the case top 5000 may correspond to the left and right support portions 7440 and the second region 5220 may correspond to the holes 7460 of the panel fixing portion 7400 ).

The sub support portions 7420, 7430, 7440 and 7450 may be formed on the other surface of the main support portion 7410 and may correspond to the number of the panel fastening portions 5200 of the case top 5000.

Fig. 11 is a cross-sectional view of the backlight unit, taken along the line A-B in Fig. 7; Fig.

Referring to FIGS. 7 and 11, a case top 500 is coupled to a side surface of the bottom cover 1000.

The guide panel 3000 is coupled to the guide panel recess 1100 of the bottom cover 1000.

A reflective sheet 4005 is disposed on the bottom surface of the bottom cover 1000.

The reflective sheet 4005 may have a shape corresponding to the bottom surface of the bottom cover 1000. Specifically, the reflective sheet 4005 may include a bottom surface 4015, an inclined surface 4025, and an end surface 4035. The bottom surface 4015 of the reflective sheet 4005 corresponds to the bottom surface of the bottom cover 1000 and may be parallel to the horizontal surface. The inclined surface 4025 of the reflective sheet 4005 may be inclined as an edge area of the reflective sheet 4005. The end surface 4035 of the reflective sheet 4005 may be parallel to the bottom surface 4015 as the outermost edge region of the reflective sheet 4005.

The edge of the optical member 4000 may be seated on the end surface 4035 of the reflective sheet 4005. The optical member at this time may be a diffusion sheet, a prism sheet, a protective sheet, and a light guide plate.

A main supporting portion 7410 constituting the panel fixing portion 7400 may be disposed at the rear edge of the liquid crystal panel 7100. [

The bottom cover fastening portion 5300 of the case top 5000 is inserted into the hole 1221 of the bottom cover fastening portion insertion hole of the bottom cover 1000. A bottom cover fastening hole 5310 is formed in the bottom cover fastening portion 5300 and a hook portion 1222 of the bottom cover fastening portion insertion hole of the bottom cover 1000 is inserted into the bottom cover fastening hole 5310 . Thus, the case top 5000 and the bottom cover 1000 can be coupled to each other.

12 is a cross-sectional view of the backlight unit, taken along the line C-D in FIG. 7;

7 and 11, the panel fastening portion 5200 of the case top 5000 inserted through the panel fastening portion insertion hole 1210 of the bottom cover 1000 can be engaged with the panel fastening portion 7400 have.

The second area 5220 of the panel fastening part 5200 may be inserted into the hole 7460 of the panel fixing part 7400. Accordingly, the case top 5000, the bottom cover 1000 and the panel 7000 are coupled to each other to guide the panel 7000 to flow in a certain region, thereby fixing the panel 7000 in a predetermined region.

On the other hand, the predetermined region in which the panel 7000 can flow is a fine region formed according to the manufacturing tolerance. Therefore, it can be seen that the panel 7000 is substantially fixed so as not to flow.

Fig. 13 is a cross-sectional view of the backlight unit, taken along line E-F in Fig. 7; Fig.

7 and 13, the panel fastening portion 5200 of the case top 5000 inserted through the panel fastening portion insertion hole 1210 of the bottom cover 1000 can be coupled with the panel fastening portion 7400 have.

The first area 5210 of the panel fastening part 5200 may be coupled to the panel fixing part 7400.

The screw fastening portion 5400 of the case top 5000 can be inserted into the screw fastening portion insertion groove 1230 of the bottom cover 1000. [ At this time, a screw insertion groove 1310 for inserting a screw may be formed in a region corresponding to a region where the screw fastening portion insertion groove 1230 is formed in the bottom surface region of the bottom cover 1000.

The screw 1300 inserted through the screw insertion hole 1310 formed in the bottom surface of the bottom cover 1000 passes through the screw insertion hole 1230 and is screwed into the screw connection hole 5410 of the screw connection portion 5400 Can be combined.

According to the above-described embodiment of the present invention, a case top 5000 coupled to a side surface of the bottom cover 1000, rather than a conventional case top which has a structure for covering the upper edge of the liquid crystal panel, The side surface of the panel 7000 corresponds to the side surface of the panel 7000, and a clear borderless design can be realized. Also, the coupling process can be simplified by using a structure in which the case top 5000 is formed in a plurality of separate structures rather than one structure and is coupled to the case top insertion portion 1200 of the bottom cover 1000. Also, the entire thickness of the liquid crystal display device can be reduced through the structure that the bottom cover 1000 and the case top 5000 can be coupled only through the screw 1300. The number of parts can be reduced and the structure of the backlight unit 100 can be simplified by constructing the backlight unit 100 using only the bottom cover 1000, the panel fixing part 7400 and the case top 5000 without additional components The backlight unit 100 can be made lighter and the mold investment cost can be reduced. Further, the non-display area exposed to the external appearance can be minimized to realize the narrow bezel.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

100 backlight unit
1000 bottom cover
1100 Guide panel insert groove
1200 case top insertion part
1210 Panel fastening part insertion hole
1220 Bottom cover fastening part insertion hole
1221 Bottom cover fastening part Insert hole hole
1222 Bottom cover fastening part Hook part of insertion hole
1230 Screw fastener insertion groove
1300 screw
1310 Screw insertion groove
2000 Light source
3000 Guide Panel
4000 optical member
4001 light guide plate
4002 diffusion sheet
4003 prism sheet
4004 Protective Sheet
4005 reflective sheet
4015 bottom surface of reflective sheet
4025 slope of reflective sheet
4035 End face of reflective sheet
5000 case top
5100 body part
5101 First body part
5102 Second body part
5103 Third body part
5200 Panel fastening part
5210 First area of panel fastening
5220 The second area of the panel fastener
5300 Bottom cover fastening part
5310 Bottom cover tightening hole
5400 Screw fastening part
5410 Screw tightening hole
5500 Hemming
5510 upper hemming section
5520 Lower hemming section
6000 case top down
7000 panels
7100 liquid crystal panel
7200 PCB
7300 FPC
7400 panel fixing section
7410 main support portion
7420 As a sub-support,
7430 As a sub-support,
7440 As a sub-support,
7450 As the sub-support portion,

Claims (13)

A bottom cover having a case top inserting portion; And
And a case top having a bottom cover fastening portion,
Wherein the case top inserting portion includes a bottom cover fastening portion hole and a hook portion formed in the bottom cover fastening portion hole,
And the bottom cover fastening portion is fastened to the hook portion. The method according to claim 1,
The case top further comprises a screw fastening portion,
Wherein the case top insertion portion further comprises a screw fastening portion insertion groove,
And the screw fastening portion is fastened to the screw fastening portion insertion groove. The method according to claim 1,
The backlight unit may further include a liquid crystal panel and a panel fixing unit coupled to the liquid crystal panel,
The case top further comprises a panel fastening portion,
Wherein the case-top insertion portion further includes the panel-fastening portion insertion hole,
And the panel fastening part is coupled to the panel fixing part through the panel fastening part insertion hole. The method of claim 3,
Wherein the panel fixing portion includes a main support portion disposed at a rear edge of the liquid crystal panel, and a sub support portion formed at the main support portion and engaged with the panel fastening portion. 5. The method of claim 4,
And the main support portion includes a plurality of sub support portions. 5. The method of claim 4,
Wherein the main support portion includes first to third main supporters disposed on the upper side, the left side, and the right side of the back surface of the liquid crystal panel, respectively, and separated from each other. The method according to claim 1,
Wherein the case top has a body portion facing a side surface of the bottom cover,
Wherein the bottom cover fastening portion is formed on the body portion. 3. The method of claim 2,
Wherein the case top has a body portion facing a side surface of the bottom cover,
Wherein the screw fastening portion is formed on the body portion. The method of claim 3,
Wherein the case top has a body portion facing a side surface of the bottom cover,
Wherein the panel fastening part is formed on the body part. 10. The method of claim 9,
The body portion includes a first body portion corresponding to a left side surface of the bottom cover, a second body portion corresponding to a right side surface of the bottom cover, and a third body portion corresponding to an upper side surface of the bottom cover,
And the first to third bodies are separated from each other. 10. The method of claim 9,
Wherein the body portion includes an upper hemming portion and a lower hemming portion. The method according to claim 1,
Wherein the bottom cover includes a plurality of case-top insertion portions. The method of claim 3,
And the side surface of the bottom cover faces a side surface of the liquid crystal panel.

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