KR20120137195A - Back light unit and liquid crystal display device using the same - Google Patents

Abstract

PURPOSE: A back light unit and a liquid crystal display device using the same are provided to improve the durability and the assembling structure of a light emitting unit. CONSTITUTION: A light source fixing unit(41) fixes light sources(40). A housing for a light emitting portion(20) is curved. The housing surrounds the front and the side surfaces of a bottom cover(10) and one side of the light source fixing unit. A diffusing plate(70) receives the light of each light source. The diffusing plate guides the light to the direction of the front surface. An optical sheet(80) vertically radiates the light from the diffusing plate and an incident surface.

Description

BACK LIGHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME}

The present invention relates to a backlight unit, and in particular, to improve the assembly structure of the backlight unit, the durability of the assembly structures can be strengthened, as well as to prevent defects such as dark spots and light leakage. A unit and a liquid crystal display using the same.

As the information society develops, the demand for image display devices is increasing in various forms. Recently, liquid crystal displays, field emission displays, plasma display panels, Various flat panel displays, such as a light emitting display, are utilized.

Among flat panel displays, liquid crystal displays are widely used due to their low power drive and excellent image quality. As a liquid crystal display, a liquid crystal panel composed of two substrates facing each other and a liquid crystal interposed therebetween is used. Such a liquid crystal panel corresponds to a non-emission display panel, and receives light from a backlight unit to display an image. In general, the backlight unit is divided into an edge type backlight unit and a direct type backlight unit according to the position of the light source.

Recently, as the liquid crystal display device becomes thinner and lighter, the backlight unit also becomes thinner and lighter. Accordingly, the backlight unit mainly uses a light emitting diode (Light Emitting Diode) which is advantageous in terms of power consumption, weight, brightness, and the like. In addition, in order to implement a lightweight, thin, high-brightness backlight unit, a trend is mainly to use an edge type backlight unit that allows a light emitting diode to supply light from the side of the backlight unit.

However, according to the recent trend, the thickness of the liquid crystal display and the backlight unit is made thinner, and the edge thereof is also formed in a narrower shape. In particular, as the bezel structure, which is used as the front case, is thinner and narrower, durability of the assembly structures is inevitably deteriorated. The problem is that they are easily deformed even with a small external force. For example, in the case of a panel guide, which is an intermediate structure for assembling a backlight unit and a liquid crystal display device, when it is deformed or damaged by an external force, a poor display such as light leakage may cause an image display defect and greatly increase the reliability of the product. Problems such as lowering.

In addition, although the efficiency of light emitting diodes is improved and the number of applications thereof is reduced according to the trend of light weight thinning of the backlight unit, in this case, the gap between the light emitting diodes is inevitably enlarged, so that image display defects such as dark spots between light emitting diodes are generated. There was a problem caused.

The present invention is to solve the above problems, by improving the assembly structure of the back light unit to be able to enhance the durability of the assembly structures and to prevent defects such as dark spots and light leakage. A backlight unit and a liquid crystal display using the same.

A backlight unit according to an embodiment of the present invention for achieving the above object includes a plurality of light sources for generating light; A light source fixing part for mounting the plurality of light sources and fixedly disposed on an inner side surface of the bottom cover; A light emitting part housing bent at least once and formed to surround the front and side surfaces of the bottom cover on which the light source fixing part is disposed together with one side of the light source fixing part; A diffuser plate which receives light from each of the light sources to the side incident surface thereof and changes the traveling direction of the light toward the entire surface to emit the light; And a plurality of optical sheets disposed on the diffuser plate to vertically emit light from the diffuser plate and side light incident surfaces thereof.

The light emitting unit housing is bent to at least one or more times in a “Г” shape to cover and fix both the front outer portion of the diffusion plate, one side of the light source fixing part, and both the front and side surfaces of the bottom cover on which the light source fixing part is disposed. It is characterized by.

The light emitting part housing may be formed of a material having a higher rigidity than the bottom cover or the light source fixing part and the panel guide, but may be thinner than the panel guide and the bottom cover.

The light emitting unit housing may be formed of a metallic material for reflecting light or a reflecting sheet for reflecting light on at least one surface thereof to reflect light from each light source to the diffuser plate.

The light emitting unit housing extends from the upper surface and the upper surface formed by bending at least one time from the side surface portion to surround the light source fixing portion or the bottom surface of the bottom cover and the upper surface of the light source fixing portion and the light source. Characterized in that consisting of the front portion.

The light source fixing part and the light source are respectively provided on an inner surface of the side part of the light emitting part housing, and an upper surface of the light emitting part housing reflects light from each light source to the front, and an upper surface of the light emitting part housing is The region corresponding to the light source is bent at a plurality of times at different angles so that the light from each light source is distributed and reflected in the front direction and both sides according to the respective bent surfaces.

At least one fastening hole is formed in the front side of the light emitting unit housing corresponding to the front side of the outer sidewall of the bottom cover or in the side of the light emitting unit housing corresponding to the side surface of the bottom surface of the bottom cover to penetrate the respective fastening holes. The bottom cover and the light emitting unit housing is assembled and fastened by at least one fastening member.

At least one of the top case and the panel guide may further include holes corresponding to the fastening holes of the light emitting unit housing, respectively, so that at least one of the top case and the panel guide, and the fastening hole of the light emitting unit housing and the bottom cover. The panel guide, the light emitting unit housing, and the bottom cover are assembled and fastened by respective fastening members penetrating them.

The light emitting unit housing is bent at least one more time and formed in a shape of "C" extending from the "Г" shape to form a part of the front outer portion of the diffusion plate, one side of the light source fixing part, and a bottom at which the light source fixing part is disposed. The front cover, the side surface and the rear portion of the cover may be disposed to fix all, at least one fastening hole is formed on the rear surface of the light emitting unit housing corresponding to one side of the bottom cover to penetrate the respective fastening holes. And a back surface of the bottom cover and the light emitting unit housing are assembled and fastened by fastening members.

In addition, the liquid crystal display according to an embodiment of the present invention for achieving the above object comprises a liquid crystal panel for displaying an image having a plurality of pixel areas; A panel guide for seating and fixing the liquid crystal panel; A top case assembled to surround the panel guide including an outer periphery of the liquid crystal panel; And a backlight unit including at least one of various technical features as described above to irradiate light to the liquid crystal panel.

The backlight unit of the present invention having the above characteristics and the liquid crystal display using the same may enhance the durability of the backlight unit and its assembly structures by improving the assembly structure of the backlight unit, in particular, the light emitting unit assembly structure.

In addition, while it is possible to prevent defects such as dark spots and light leakage, the reliability of the product may be further improved due to the enhanced durability of the liquid crystal display device in which the backlight unit is assembled.

1 is an exploded perspective view schematically illustrating a backlight unit and a liquid crystal display using the same according to an exemplary embodiment of the present invention.
FIG. 2 is an exploded cross-sectional view of the II ′ cutting plane of FIG. 1. FIG.
3 is a cross-sectional view showing a state in which the II 'cutting surface of Figure 1 assembled.
4A and 4B are perspective views illustrating the light emitting unit housing illustrated in FIG. 3 in detail.
5A to 5C are assembled cross-sectional views illustrating the fixing structure of the light emitting unit housing illustrated in FIG. 3.

Hereinafter, a backlight unit and a liquid crystal display using the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view schematically illustrating a backlight unit and a liquid crystal display using the same according to an exemplary embodiment of the present invention.

The liquid crystal display of the present invention shown in FIG. 1 includes a backlight unit 2; A panel guide 90; And includes a liquid crystal panel 100 and a top case 130.

The liquid crystal panel 100 is stacked on the panel support portion of the panel guide 90 to adjust the transmittance of light from the backlight unit 2 to display an image. To this end, the liquid crystal panel 100 is a liquid crystal (not shown) formed between the lower substrate 102 and the upper substrate 104, the lower substrate 102 and the upper substrate 104, the lower substrate 102 and the upper substrate ( And a spacer (not shown) for maintaining a constant gap therebetween.

The upper substrate 104 further includes blue, red, and green color filters, a black matrix, a common electrode, and the like.

The lower substrate 102 includes a thin film transistor formed in each cell region defined by data lines and gate lines and a pixel electrode connected to the thin film transistor. The thin film transistor switches the image signal supplied from the data line to the pixel electrode in response to the gate-on voltage supplied from the gate line. Here, the common electrode formed on the upper substrate 104 may be formed on the lower substrate 102 according to the liquid crystal mode.

In addition, a non-display area of the lower substrate 102 is provided with a data pad area connected to each of the data lines and a gate pad area connected to each of the gate lines.

In the data pad area, a plurality of data circuit films 110 mounted with a data integrated circuit 112 for supplying image signals to the data lines are attached. Each data circuit film 110 may be a tape carrier package or a chip on film. Each of the data circuit films 110 supplies a data signal or the like from a data printed circuit board (not shown) to the data integrated circuit 112, and supplies an image signal output from the data integrated circuit 112 to each data line. do. The data integrated circuit 112 may be mounted on the lower substrate 102 by a chip on glass method. In this case, the data integrated circuit 112 mounted on the lower substrate 102 receives a data signal from the data printed circuit board through the data circuit film 110.

A plurality of gate circuit films 120 on which the gate integrated circuit 122 is mounted to supply gate-on voltages to the gate lines are attached to the gate pad region. Each gate circuit film 120 may be a tape carrier package or a chip on film. Each of the gate circuit films 120 supplies a gate control signal supplied from the data printed circuit board to the gate integrated circuit 122 through the data circuit film 110 and the lower substrate 102, and the gate integrated circuit 122. The gate-on voltage outputted from the N / A) is supplied to each gate line. Here, the gate integrated circuit 122 may be mounted on the lower substrate 102 by a chip on glass method, or may be formed on the lower substrate 102 together with the manufacturing process of the thin film transistor.

The panel guide 90 is mounted to the seating portion of the bottom cover 10 to surround the front edges and side surfaces of the diffusion plate 70 and the plurality of optical sheets 80 and to surround the side surfaces of the bottom cover 10. The panel guide 90 includes a panel supporter for supporting the liquid crystal panel 100. The panel support part is formed to be stepped to support the rear non-display area and the side surface of the liquid crystal panel 100.

The top case 130 is bent to surround the front non-display area of the liquid crystal panel 100 and the side surface of the panel guide 90. At this time, the top case 130 is fastened and fixed to the fastening ring 90a of the panel guide 90 surrounding the side of the bottom cover 10. In recent years, the thickness of the top case 130, for example, the thickness of the bezel (Bezel) and the front width in forming a thinner and narrower, the thickness or the forming width of the panel guide 90 is also a trend to form a thinner and narrower.

FIG. 2 is an exploded cross-sectional view illustrating a cut plane taken along line II ′ of FIG. 1. 3 is a cross-sectional view illustrating a state in which the II ′ cutting surface of FIG. 1 is assembled.

The backlight unit 2 shown in FIGS. 2 and 3 includes a plurality of light sources 40 for generating light; A light source fixing part 41 mounted with a plurality of light sources 40 and fixedly disposed on an inner side surface of the bottom cover 10; A light emitting unit housing 20 which is bent at least once and formed to surround the front and side surfaces of the bottom cover 10 on which the light source fixing part 41 is disposed together with one side of the light source fixing part 41; A diffuser plate 70 which receives light from each light source 40 on its side incident surface and changes the traveling direction of the light toward the front surface to emit light; And a plurality of optical sheets 80 arranged on the diffuser plate to vertically emit light from the diffuser plate and the side light incident surface thereof.

The light emitting part of the present invention, that is, the light source fixing part 41 in which the plurality of light sources 40 and each of the light sources 40 are mounted, is disposed and fixed to at least one side of the bottom cover 10.

Each of the plurality of light sources 40 is detachably mounted to the light source fixing part 41 so as to face the side light incident surface of the diffuser plate 70. Here, the plurality of light sources 40 may be a light emitting diode (UV) or an ultraviolet light emitting diode of a single color, red, green, blue, or the like. Each of the plurality of light sources 40 is turned on by the light source driving power supplied through the light source fixing part 41 to irradiate light to the side incident surface of the diffuser plate 70.

The light source fixing part 41 is installed with a plurality of light sources 40 on one side of the bottom cover 10 to supply light source driving power transmitted from the outside to the plurality of light sources 40. In other words, the light source fixing part 41 may be formed of a printed circuit board or the like, and when a plurality of light sources 40 are mounted, the light source driving power transmitted from the outside through a pattern or a wiring formed thereon may be used for the plurality of light sources. Supply to 40.

The diffusion plate 70 is stacked on the front opening of the bottom cover 10 having a rectangular frame shape, that is, the inner bottom surface of the bottom cover 10. At this time, the side incident surface of the diffuser plate 70 is located in front of the light source fixing part 41, that is, the side incident surface of the diffuser plate 70 faces the light source fixing part 41. The diffusion plate 70 converts the propagation path of the light irradiated from each light source 40 to the side light incident surface thereof and diffuses the light to the front surface, that is, the entire back surface of the liquid crystal panel 100. Meanwhile, as shown in FIG. 2, a reflective sheet is further provided between the back surface of the diffusion plate 70, that is, between the diffusion plate 70 and the bottom cover 10, and the light exiting to the back surface of the diffusion plate 70 is again diffused. Reflected at 70.

The plurality of optical sheets 80 adjusts the light path so that the incident light diffused through the diffusion plate 70 is irradiated perpendicularly to the liquid crystal panel 100. To this end, the plurality of optical sheets 80 may include at least one prism sheet 82, a diffusion sheet 84, a polarizing sheet 84, and a protective sheet (not shown) for condensing light diffused by the diffusion plate 70. ), Etc. In this case, the types of stacked sheets or the stacking order may be converted according to the use purpose of the backlight unit 10.

The light emitter housing 20 is formed to be wrapped at least once to surround the light source fixing part 41 and the peripheral portion of the bottom cover 10 on which the light source fixing part 41 is disposed. In detail, the light emitting unit housing 20 is bent at least once in a “Г” shape to form a portion of the front outer portion of the diffusion plate 70, one side of the light source fixing part 41, and the light source fixing part 41. It is arranged to wrap and fix both the front and side of the bottom cover 10 is disposed.

The light emitting unit housing 20 may prevent deformation of the bottom cover 10 at the position where the light source fixing part 41 and the light source fixing part 41 are formed, thereby preventing an external force from being applied to the panel guide 90. . Specifically, the thickness and the front width of the bezel (Bezel), which is the top case 130, are thinner and narrower, and thus the thickness and the forming width of the panel guide 90 are also thinner and narrower. Accordingly, the panel guide 90 and the light source fixing part 41 including the top case 130 may be weakened by external force and may be easily deformed or damaged. Accordingly, the light emitting unit housing 20 is disposed between the bottom cover 10 and the panel guide 90 at the portion where the light source fixing part 41 is formed to deform the bottom cover 10 and the light source fixing part 41. To prevent. In addition, the influence of the external force may be minimized so that the panel guide 90 is not deformed or damaged by the external force at the lower portion of the panel guide 90. To this end, the light emitter housing 20 is preferably formed of a material having a higher rigidity than the bottom cover 10, the light source fixing part 41, and the panel guide 90, for example, a metallic material. In addition, the light emitting unit housing 20 may be formed thinner than the panel guide and the bottom cover 10 so that the backlight unit 2 may be thinner.

4A and 4B are perspective views illustrating the light emitting unit housing illustrated in FIG. 3 in detail.

As shown in FIGS. 4A and 4B, the light emitter housing 20 includes a side part 20a surrounding one side of the light source fixing part 41 or the bottom cover 10, a light source fixing part 41, and a light source ( The upper surface 20b is bent at least once from the side portion 20a so as to surround the upper surface of the 40 and the front portion 20c extending from the upper surface 20b.

Here, the light source fixing part 41 and the light source 40 are provided on the inner surface of the side part 20a of the light emitting part housing 20, and the upper surface 20b of the light emitting part housing 20 is provided from each light source 40. Reflect the light to the front. The upper surface 20b of the light emitting unit housing 20 has a region corresponding to each light source 40 bent a plurality of times at different angles so that the light from each light source 40 is fronted according to the bent surfaces. Disperse in both directions and on both sides for reflection. Since light from each of the light sources 40 is reflected corresponding to the plurality of bent reflective surfaces, the light may be distributed in the lateral direction corresponding to each of the plurality of bent reflective surfaces instead of the front direction. Therefore, even if each light source 40 is arranged at a predetermined interval, it is possible to minimize the dark spots that can be generated by the interval.

On the other hand, the light emitting unit housing 20 is formed of a metallic material that reflects light or a reflective sheet for reflecting light is formed on at least one surface thereof to transfer the light from each light source 40 to the diffuser plate 70. Can be reflected. In particular, the surface located on the side of each light source 40 of the inner surface of the light emitting unit housing 20 is applied with light from the light sources 40, so that the applied light to the diffuser plate 70 by reflecting the applied light It is desirable to improve the

In addition, although not shown in the drawings, at least one of the four surfaces of the bent light emitting unit housing 20 is further provided with an adhesive member such that the light emitting unit housing 20 is connected to the panel guide 20 or the bottom cover 10. Can be adhesively fixed. In particular, among the four surfaces of the bent light emitting unit housing 20, the surface contacting the panel guide 20 and the surface contacting the bottom cover 10 are formed with adhesive members such as double-sided tape or an adhesive material, respectively. 20 may be adhesively fixed to the panel guide 20 and the bottom cover 10.

On the other hand, the backlight unit 2 is further provided with a light source driving circuit unit (not shown) for generating a light source driving power to drive the respective light sources 40, the light source to each light source 40 through the light source fixing portion 41 Supply the driving power. Here, the light source driving circuit unit is composed of at least one inverter or switching circuits to generate the light source driving power by converting the external power input to the AC power to the DC power. The generated light source driving power is supplied to the respective light sources 40 according to the driving timing of the liquid crystal panel 100 and the like. As described above, the backlight unit 2 generates light by illuminating the plurality of light sources 40 with the light source driving power supplied from the light source driving circuit unit to irradiate the liquid crystal panel 100 or the like.

5A to 5C are assembled cross-sectional views illustrating the fixing structure of the light emitting unit housing illustrated in FIG. 3.

As shown in FIG. 5A, the light emitting part housing 20 fixing the light source fixing part 41 and the diffusion plate 70 in a bent form is attached to the bottom cover 10 through at least one fastening member 22. Assembly can be fastened. Specifically, at least one fastening hole is formed in the front portion of the light emitting unit housing 20 corresponding to the front side of the outer sidewall of the bottom cover 10, and the bottom cover is formed by the fastening members 22 passing through the respective fastening holes. 10 and the light emitting unit housing 20 may be assembled and fastened. Each of the fastening members 22 may be a screw or a screw piece. The fastening members 22 may pass through fastening holes formed in the light emitting unit housing 20 and the bottom cover 10, respectively. 20) and the bottom cover (10).

Although not shown, holes corresponding to the fastening holes of the light emitting unit housing 20 may be further formed in the panel guide 90 corresponding to the front surface of the light emitting unit housing 20 and the bottom cover 10. The panel guide 90, the light emitting unit housing 20, and the bottom cover 10 are formed by the respective fastening members 22 penetrating through the fastening holes of the light emitting unit housing 20 and the bottom cover 10. Assembly may be fastened.

Referring to FIG. 5B, at least one fastening hole is formed on a side surface of the light emitting unit housing 20 corresponding to the bottom surface side of the bottom cover 10, and is fastened by fastening members 22 passing through each fastening hole. Side surfaces of the bottom cover 10 and the light emitting unit housing 20 may be assembled and fastened. That is, each fastening member 22 passes through fastening holes formed in the light emitting unit housing 20 and the bottom cover 10, respectively, to fix the light emitting unit housing 20 and the bottom cover 10.

On the other hand, holes corresponding to the fastening holes of the light emitting unit housing 20 are further formed in at least one of the top case 130 and the panel guide 90 so that the top case 130 and the panel guide are respectively formed. The panel guide 90, the light emitting unit housing 20, and the bottom cover are provided by at least one of the 90, and the respective fastening members 22 passing through the fastening holes of the light emitting unit housing 20 and the bottom cover 10. 10 may be assembled and fastened.

Referring to FIG. 5C, the light emitting unit housing 20 may be bent at least once in a shape of “c” so that a portion of the front outer portion of the diffuser plate 70 and one side of the light source fixing part 41 and the light source fixing part 41 are formed. The front cover and the side and the rear portion of the bottom cover 10 may be disposed so as to surround and fix all, at least one fastening to the back of the light emitting unit housing 20 corresponding to one side of the bottom cover 10 The bottom of the bottom cover 10 and the light emitting unit housing 20 may be assembled and fastened by the fastening members 22 passing through the fastening holes. That is, each fastening member 22 may fix the light emitting unit housing 20 and the bottom cover 10 by passing through the fastening holes formed in the back surface of the light emitting unit housing 20 and the bottom cover 10, respectively. ,

As described above, in the backlight unit and the liquid crystal display using the same, the assembly structure of the backlight unit 2, in particular, the assembly structure of the light emitting units 40 and 41 may be formed using the light emitting unit housing 20. By improving, the durability of the backlight unit 2 and the panel guide 90 and the top case 130 which are its assembly structures can be strengthened. In addition, it is possible to prevent defects such as dark spots and light leakage through the assembling structure of the light emitting unit housing 20, and further improve the reliability of the product by strengthening the overall durability of the liquid crystal display device in which the backlight unit 2 is assembled. Can be improved.

On the other hand, the present invention described above is not limited to the above-described embodiment and the accompanying drawings, it is possible that various substitutions, modifications and changes within the scope without departing from the technical spirit of the present invention It will be apparent to those skilled in the art.

Claims (10)

A plurality of light sources for generating light;
A light source fixing part for mounting the plurality of light sources and fixedly disposed on an inner side surface of the bottom cover;
A light emitting part housing bent at least once and formed to surround the front and side surfaces of the bottom cover on which the light source fixing part is disposed together with one side of the light source fixing part;
A diffuser plate which receives light from each of the light sources to the side incident surface thereof and changes the traveling direction of the light toward the entire surface to emit the light; And
And a plurality of optical sheets disposed on the diffuser plate to vertically emit light from the diffuser plate and side light incident surfaces thereof. The method of claim 1,
The light emitting unit housing
At least one or more times bent in the form of "Г" characterized in that it is arranged to wrap and secure both the front and side portions of the front outer portion of the diffusion plate and the light source fixing portion and the bottom cover on which the light source fixing portion is disposed Back light unit. The method of claim 2,
The light emitting unit housing
The backlight unit, characterized in that the bottom cover or the light source fixing portion and the panel guide is formed of a material having a higher rigidity than the panel guide and the bottom cover. The method of claim 3, wherein
The light emitting unit housing
And a reflective sheet for reflecting light on at least one surface of the metallic material for reflecting light or reflecting the light to reflect light from the respective light sources to the diffuser plates. The method of claim 4, wherein
The light emitting unit housing
And a front surface extending from the upper surface and the upper surface formed by bending at least one or more times from the side surface to surround the light source fixing portion or the bottom surface of the bottom cover and the upper surface of the light source fixing portion and the light source. Backlight unit. The method of claim 5, wherein
On the inner surface of the side portion of the light emitting unit housing
The light source fixing part and the light source are respectively provided so that the upper surface of the light emitting part housing reflects the light from each light source to the front,
The upper surface of the light emitting unit housing is bent a plurality of times at different angles corresponding to the respective light sources, and the light from each light source is dispersed in the front direction and both sides according to each of the bent surfaces. Back light unit, characterized in that. The method according to claim 6,
At least one fastening hole is formed in the front side of the light emitting unit housing corresponding to the front side of the outer sidewall of the bottom cover or in the side of the light emitting unit housing corresponding to the side surface of the bottom surface of the bottom cover to penetrate the respective fastening holes. And the bottom cover and the light emitting unit housing are assembled and fastened by at least one fastening member. The method of claim 7, wherein
At least one of the top case and the panel guide may further include holes corresponding to the fastening holes of the light emitting unit housing, respectively, so that at least one of the top case and the panel guide, and the fastening hole of the light emitting unit housing and the bottom cover. And the panel guide, the light emitting unit housing, and the bottom cover are assembled and fastened by respective fastening members penetrating them. The method according to claim 6,
The light emitting unit housing
At least one more time is bent to form a "c" form extending from the "Г" form a portion of the front outer portion of the diffusion plate and one side of the light source fixing portion and the front and side of the bottom cover on which the light source fixing portion is disposed And it can be arranged to wrap and secure all of the rear part,
At least one fastening hole is formed on a rear surface of the light emitting unit housing corresponding to a rear surface of the bottom cover, and the bottom cover and the bottom surface of the light emitting unit housing are assembled and fastened by fastening members penetrating through the respective fastening holes. Back light unit characterized in that the. A liquid crystal panel having a plurality of pixel regions to display an image;
A panel guide for seating and fixing the liquid crystal panel;
A top case assembled to surround the panel guide including an outer periphery of the liquid crystal panel; And
And a backlight unit including the technical configuration of at least one of claims 1 to 9 to irradiate light to the liquid crystal panel.

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