KR20110118389A - Back-light assembly and display device having the same - Google Patents

Abstract

Provided are a backlight assembly for coupling a circuit board to a light source unit fixing frame or a lower housing container without reducing the area in which the point light source is mounted, and a display device including the same. The backlight assembly includes a light source unit including a circuit board including a fastening groove formed on one surface and a point light source mounted on the other surface of the circuit board opposite to one surface, and a light source unit disposed on one surface, and including a protrusion formed on one surface. Including a light source unit fixing frame, the protrusion is inserted into the fastening groove is fastened to the light source unit and the light source unit fixing frame, the depth of the fastening groove is smaller than the thickness of the circuit board.

Description

Back-light assembly and display device having the same}

The present invention relates to a backlight assembly and a display device including the same, and more particularly, a structure for coupling a circuit board on which a point light source is mounted in a backlight assembly to a light source unit fixing frame or a lower storage container, and a display including the coupling structure. Relates to a device.

Liquid crystal display is one of the most widely used flat panel displays. It consists of two substrates on which electrodes are formed and a liquid crystal layer interposed therebetween. Is applied to rearrange the liquid crystal molecules of the liquid crystal layer to control the amount of transmitted light.

Since the liquid crystal display is a passive light emitting device, a backlight assembly for providing light passing through the liquid crystal layer is required. As a light source used in the backlight assembly, a cold cathode fluorescent lamp (CCFL), an external electrofluorescent lamp (EEFL), a light emitting diode (LED), and the like may be exemplified. Demand is increasing.

In order to fix the circuit board on which the light emitting diode is mounted, a fastening member such as a screw is used. In order to fasten the circuit board using a screw, etc., a hole through which the screw penetrates the circuit board must be formed. In this case, however, the area in which the light emitting diode is mounted on the circuit board is reduced due to the space in which the screw penetrates.

SUMMARY OF THE INVENTION An object of the present invention is to provide a backlight assembly having a structure in which a circuit board is coupled to a light source unit fixing frame or a lower storage container without reducing an area on which a point light source is mounted.

Another problem to be solved by the present invention is to facilitate the coupling between the circuit board on which the point light source is mounted and the light source unit fixing frame or the lower storage container. The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a backlight assembly comprising: a light source unit including a circuit board including a fastening groove formed on one surface and a point light source mounted on the other surface of the circuit board opposite to the one surface; The light source unit is disposed on one surface, and includes a light source unit fixing frame including a protrusion formed on the one surface, wherein the protrusion is inserted into the fastening groove so that the light source unit and the light source unit fixing frame are fastened. The depth of the groove is smaller than the thickness of the circuit board.

According to another aspect of the present invention, there is provided a backlight assembly including a light guide plate, a circuit board disposed on one side of the light guide plate, and a fastening groove formed on one surface, and the other surface of the circuit board facing the one surface. A light source unit including a light source unit mounted on the light source unit, and a storage container accommodating the light guide plate and the light source unit and including a protrusion formed on one side wall on which the light source unit is disposed; The light source unit and the light source unit fixing frame are inserted into each other, and the depth of the fastening groove is smaller than the thickness of the circuit board.

According to another aspect of the present invention, there is provided a display device including a liquid crystal panel for displaying an image, a light guide plate disposed under the liquid crystal panel, and a fastening groove formed on one side of the light guide plate. A light source unit including a circuit board including and a point light source mounted on the other surface of the circuit board opposite to the one surface, the light source unit fixing frame including the protrusion formed on the one surface, wherein the light source unit is disposed on one surface, and And a storage container for accommodating the light guide plate, the light source unit, and the light source unit fixing frame, wherein the protrusion is inserted into the fastening groove so that the light source unit and the light source unit fixing frame are fastened. Smaller than the thickness of the circuit board.

Specific details of other embodiments are included in the detailed description and the drawings.

1 is an exploded perspective view of a display device according to a first exemplary embodiment of the present invention.
FIG. 2 is a cross-sectional view of the display device of FIG. 1 taken along line AA ′. FIG.
3 is a partial perspective view of a light source unit fixing frame included in the display device of FIG. 1.
4 is a cross-sectional view of the light source unit fixing frame of FIG. 3 taken along line BB ′.
5 is a partial perspective view of a light source unit included in the display device of FIG. 1.
6 is a cross-sectional view taken along line CC ′ of the light source unit of FIG. 5.
7 and 8 are partially coupled perspective views of the light source unit fixing frame of FIG. 3 and the light source unit of FIG. 5.
9 is a partially exploded perspective view of a light source unit and a light source unit fixing frame of a backlight assembly and a display device according to a second embodiment of the present invention.
10 is a perspective view illustrating a state in which the light source unit and the light source unit fixing frame illustrated in FIG. 9 are fastened.
11 is a partially exploded perspective view of a light source unit and a light source unit fixing frame of a backlight assembly and a display device according to a third embodiment of the present invention.
12 is a perspective view illustrating a state in which the light source unit and the light source unit fixing frame illustrated in FIG. 11 are fastened.
13 is an exploded perspective view of a display device according to a fourth exemplary embodiment of the present invention.
14 is a cross-sectional view taken along the line DD ′ of the display device of FIG. 13.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity.

In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, the terms "comprises" and / or "made of" means that a component, step, operation, and / or element may be embodied in one or more other components, steps, operations, and / And does not exclude the presence or addition thereof.

When elements or layers are referred to as "on" or "on" of another element or layer, intervening other elements or layers as well as intervening another layer or element in between. It includes everything. On the other hand, when a device is referred to as "directly on" or "directly on", it means that no device or layer is intervened in the middle. “And / or” includes each and all combinations of one or more of the items mentioned.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" May be used to readily describe a device or a relationship of components to other devices or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation. Like reference numerals refer to like elements throughout.

Hereinafter, a light emitting diode package according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, a backlight assembly and a display device according to a first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 8.

1 is an exploded perspective view of a display device according to a first exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view of the display device of FIG. 1 taken along line AA ′.

The display device 1 includes a display panel assembly 120 displaying an image and a backlight assembly 10 providing light to the display panel assembly 120.

The display panel assembly 120 receives light from the backlight assembly 10 to display an image. The display panel assembly 120 may have any structure in the form of a panel capable of displaying an image by receiving light from the backlight assembly 10, and the liquid crystal display panel is described as an embodiment on the present specification, but is not limited thereto. no.

The display panel assembly 120 includes a first panel 111, a second substrate 112, and a display panel 110 including polarizers 113 and 114 disposed on surfaces thereof, a liquid crystal (not shown), and a gate driver. 116, flexible film 117, and printed circuit board 118.

The display panel 110 includes a first substrate 111 including a gate line (not shown), a data line (not shown), a pixel electrode, and the like, a black matrix, a color filter, a common electrode, and the like. And a second substrate 112 disposed to face the first substrate 111, and a polarizing plate 113 disposed below the first substrate 111 and a polarizing plate 114 disposed on the second substrate 112. It includes. The color filter and the common electrode may be disposed on the first substrate 111 according to the type of the display panel 110.

The display panel 110 is stacked on the above-described flat plate-shaped substrates, and is mounted on the intermediate frame 160 to be described later.

The backlight assembly 10 includes an intermediate frame 160, an optical sheet 130, a light source unit 200, a light guide plate 140, a reflective sheet 150, a light source unit fixing frame 300, and a lower storage container 170. It includes.

The light source unit 200 includes a circuit board 210 and a plurality of point light sources 220 mounted on one surface of the circuit board 210. As the circuit board 210, a printed circuit board on which a circuit pattern is formed may be used. In this case, the printed circuit board may be a flexible printed circuit board (FPCB), a rigid printed circuit board (RPCB), a metal printed circuit board (MPCB), or a metal core printed circuit board (MCPCB). The circuit board 210 may have, for example, a rectangular plate shape.

As the point light source 220, for example, a light emitting diode may be used. The light source unit 200 may be disposed on at least one side of the light guide plate 140 as needed. That is, the light source unit 200 may be formed on one side, both sides, or all four sides of the light guide plate 140 in consideration of the size, luminance uniformity, and the like of the display panel 110.

The light source unit 200 is fixed to the light source unit fixing frame 300 for rapid heat dissipation. The fastening groove 230 is formed on the other surface of the circuit board 210, that is, the surface opposite to the surface on which the point light source 220 is mounted, and faces one surface of the light source unit fixing frame 300, that is, the circuit board 210. The protrusion 310 is formed on the surface, and the protrusion 310 is inserted into the fastening groove 230, and the inserted protrusion 310 slides from one end of the fastening groove 230 toward the other end thereof so as to fasten the fastening groove 230. By fixing at the other end of), the light source unit 200 is fixed to the light source unit fixing frame 300. The light source unit fixing frame 300 may be made of a metal having excellent thermal conductivity such as aluminum or an aluminum alloy, and may be formed by various processing methods such as extrusion, sheet metal, and casting. A coupling relationship between the light source unit 200 and the light source unit fixing frame 300 will be described later in detail with reference to the accompanying drawings.

The light guide plate 140 uniformly supplies the light provided from the light source unit 200 to the display panel 110. The light guide plate 140 is disposed on at least one side of the light source unit 200, and is accommodated in the lower storage container 170. The light guide plate 140 may be formed in a quadrangular plate shape, for example, as the display panel 110. However, the present invention is not limited thereto, and in the case of using a point light source 220 such as a light emitting diode, the light incident part 220 may be formed in various forms including grooves or protrusions in the light incident part.

Although the light guide plate 140 is described as a plate for convenience of description, the light guide plate 140 may be formed in a sheet or film form to slim the display device. That is, the light guide plate 140 is described as a concept including both a plate and a film for guiding light. The light guide plate 140 may be made of a light transmitting material, for example, an acrylic resin such as PolyMethylMethAcrylate (PMMA) or a material such as polycarbonate (PC).

A pattern may be formed on at least one surface of the light guide plate 140. For example, a scattering pattern (not shown) may be formed on the lower surface so that the guided light is emitted upward.

The optical sheet 130 is disposed on the light guide plate 140 to diffuse and collect light transmitted from the light guide plate 140. The optical sheet 130 may include a diffusion sheet, a prism sheet, a protective sheet, and the like. The diffusion sheet may disperse light incident from the light guide plate 140 to prevent the light from being partially concentrated. The prism sheet may have a triangular prism-shaped prism formed on one surface thereof, and may be disposed on the diffusion sheet to collect light diffused from the diffusion sheet in a direction perpendicular to the display panel 110. Can be. The protective sheet may be formed on the prism sheet, and may protect the surface of the prism sheet and diffuse the light to make the distribution of light uniform.

The intermediate frame 160 is coupled to the lower housing 170, and between the intermediate frame 160 and the lower housing 170, the optical sheet 130, the light guide plate 140, the light source unit 200, and the reflective sheet ( 150 and the light source unit fixing frame 300 are housed. The intermediate frame 160 is formed along the edge of the lower housing 170, and includes an open window that exposes the optical sheet 130 at the center thereof.

In addition, the display panel 110 is mounted on the middle frame 160. The intermediate frame 160 may be formed of a flexible material such as a plastic material to prevent damage to the display panel 110.

The reflective sheet 150 is disposed between the light guide plate 140 and the lower storage container 170 to reflect light emitted to the lower portion of the light guide plate 140 toward the display panel 110 to improve light efficiency.

The reflective sheet 150 may be made of, for example, polyethylene terephthalate (PET) to have reflectivity, and one surface thereof may be coated with a diffusion layer containing, for example, titanium dioxide. Meanwhile, the reflective sheet 150 may be formed of a material including a metal such as Ag.

The lower accommodating container 170 accommodates the light guide plate 140 and the light source unit fixing frame 300 to maintain rigidity of the display device. The lower accommodating container 170 includes a bottom portion and a sidewall portion extending substantially vertically from the bottom portion. It may include a storage space. The lower storage container 170 may be made of a metal material having rigidity, such as stainless steel, or a material having good heat dissipation, such as aluminum or an aluminum alloy. The light source unit fixing frame 300 may be disposed on one side wall of the lower storage container 170 to quickly transfer heat generated from the light source unit 200 to the lower storage container 170. However, unlike shown in the drawing, the side wall of the portion in which the light source unit fixing frame 300 is disposed in the lower housing 170 may be omitted.

The upper accommodating container 180 is coupled to the intermediate frame 160 and the lower accommodating container 170 to cover the display panel 110 mounted on the intermediate frame 160. An open window through which the display panel 110 is exposed is formed at the center of the upper storage container 180.

The upper accommodating container 180 may be fastened to the intermediate frame 160 and the lower accommodating container 170 through hook coupling and / or screw coupling. In addition, the combination of the upper storage container 180 and the lower storage container 170 may be modified in various forms.

Hereinafter, the coupling relationship between the light source unit 200 and the light source unit fixing frame 300 will be described with reference to FIGS. 3 to 8. 3 is a partial perspective view of a light source unit fixing frame included in the display device of FIG. 1, FIG. 4 is a cross-sectional view taken along line BB ′ of the light source unit fixing frame of FIG. 3, and FIG. 5 is included in the display device of FIG. 1. FIG. 6 is a cross-sectional view of the light source unit of FIG. 5 taken along line CC ′, and FIGS. 7 and 8 are partially coupled perspective views of the light source unit fixing frame of FIG. 3 and the light source unit of FIG. 5. .

1 to 4, the light source unit fixing frame 300 includes a frame sidewall portion 320 on which the light source unit 200 is disposed and a frame bottom portion 330 formed substantially perpendicular to the frame sidewall portion 320. It may include. The frame side wall portion 320 is a portion disposed in parallel with the side wall portion of the lower storage container 170, and the frame bottom portion 330 is a portion disposed in parallel with the bottom portion of the lower storage container 170.

A protrusion 310 is formed on one surface of the frame side wall part 320 to which the light source unit 200 is fastened. The protrusion 310 may be formed by extruding by adding a protrusion shape to one surface of the frame side wall part 320 and then cutting a region except the protrusion shape on one surface of the frame side wall part 320 through milling. The protrusion 310 may be integrally formed with the frame sidewall 320.

The protrusion 310 may have a dove tail shape. That is, the protrusion 310 may have a shape in which the width w1 of the direction perpendicular to the sliding direction decreases as the frame sidewall 320 is closer to the frame side wall 320. However, the present invention is not limited thereto, and the protrusion 310 may have various shapes.

A stopper 340 may be formed at an end of the frame sidewall 320 to prevent the light source unit 200 from moving after the light source unit 200 is fixed to the frame sidewall 320. . The stopper 340 may be formed to protrude from one surface of the frame sidewall 320, like the protrusion 310. For example, the stopper 340 may be formed at the same time as the protrusion 310 is formed. The stopper 340 is adjacent to one end of the light source unit 200 without overlapping the light source unit 200 when the light source unit 200 is fixed to the frame side wall part 320.

A pin groove 350 may be formed at an end of the frame side wall 320 inwardly of the stopper 340. The pin groove 350 is formed to have a predetermined depth from one surface of the frame side wall portion 320 and is not formed to penetrate to the other surface of the frame side wall portion 320. The pin groove 350 is for facilitating disassembly of the light source unit 200 and the frame side wall part 320 which are fastened. By inserting a pin into the pin groove 350 to push the light source unit 200, disassembly of the light source unit 200 and the frame side wall part 320 can be facilitated. The fin groove 350 may be formed in an area where the light source unit 200 and the frame side wall part 320 overlap with each other, and may be formed adjacent to the stopper 340.

3, 5, and 6, the fastening groove 230 is formed on the other surface of the circuit board 210, that is, the surface opposite to the surface on which the point light source 220 is mounted. The fastening groove 230 is not formed to penetrate one surface from the other surface of the circuit board 210. That is, the depths d1 and d2 of the fastening groove 230 are smaller than the thickness t of the circuit board 210. In this way, the protrusion 310 is not visible on one surface of the circuit board 210 on which the point light source 220 is mounted while the light source unit 200 is fixed to the light source unit fixing frame 300.

The length l2 of the fastening groove 230 is equal to the length l1 of the protrusion 310, for example, the maximum length l1 of the protrusion 310 when the protrusion 310 has a dovetail shape. It can be longer. For example, the length l2 of the fastening groove 230 may be about three to four times the length l1 of the protrusion 310. On the other hand, in this embodiment, the longitudinal direction of the fastening groove 230 is formed in a direction parallel to the longitudinal direction of the circuit board 210, the longitudinal direction of the fastening groove 230, that is, the sliding direction of the circuit board 210 is It may be different from the longitudinal direction of the circuit board 210.

The fastening groove 230 may be formed so that the size at one end 230a is larger than the size at the other end 230b. The size of the fastening groove 230 at one end 230a may be larger than the size of the protrusion 310 so that the protrusion 310 may be easily inserted. The size of the fastening groove 230 in the other end 230b in which the protrusion 310 inserted into the fastening groove 230 is finally fixed by sliding is one end 230a to reinforce the fastening force with the protrusion 310. It may be smaller than the size of the fastening groove 230 in.

As a specific example, the outer width w2 of the fastening groove 230 at one end 230a may be greater than the width w1 of the protrusion 310 and the width of the fastening groove 230 at the other end 230b. W3 may be smaller than the width or the maximum width w1 of the protrusion 310. In particular, when the protrusion 310 has a dove tail shape, the inner space of the fastening groove 230 may also have a shape corresponding to the dove tail. That is, the distance between the opposing side walls of the inside of the fastening groove 230 may have a shape that increases as the distance from the outside of the fastening groove 230 to the inner bottom surface. At this time, when the outer width w3 of the other end 230b of the fastening groove 230 is smaller than the maximum width w1 of the protrusion 310, the circuit board 210 is slid so that the protrusion 310 is fastened to the fastening groove 230. As the movement toward the other end 230b of) increases, the circuit board 210 and the frame side wall part 320 may be in close contact with each other.

The depth of the fastening groove 230 may be constant from one end 230b of the fastening groove 230 to the other end 230b. However, in order to closely contact the circuit board 210 and the frame sidewall part 320, it may be gradually deepened. That is, the depth d2 of the fastening groove 230 at the other end 230b may be deeper than the depth d1 of the fastening groove 230 at the one end 230a. Therefore, the bottom surface of the fastening groove 230 may be an inclined surface.

7 and 8, a method of fastening the light source unit 200 and the light source unit fixing frame 300 will be described. After aligning the protrusion 310 and the one end 230a of the fastening groove 230, the protrusion 310 is inserted into the one end 230a of the fastening groove 230. Thereafter, the light source unit 200 is slid in the sliding direction (x) so that the protrusion 310 is fixed to the other end 230b of the fastening groove 230 to fasten the light source unit 200 to the light source unit fixing frame 300. This is done.

In an embodiment of the present invention, the fastening groove 230 is formed on one surface of the circuit board 210 opposite to the surface on which the point light source 220 is mounted, and the depth of the fastening groove 230 is defined in the circuit board 210. Since the surface on which the point light source 220 is mounted is not penetrated by the fastening groove 230 by forming it shallower than the thickness, there is no loss in the area where the point light source 220 is mounted.

In addition, the protrusion 310 is formed on one surface of the frame side wall part 320 of the light source unit fixing frame 300, and the protrusion 310 is inserted into the fastening groove 230 in a sliding manner so that the light source unit 200 is a light source unit. By being fixed to the fixing frame 300, the light source unit 200 and the light source unit fixing frame 300 are easily fastened, and the screw is tightened when the light source unit 200 and the light source unit fixing frame 300 are fastened or reworked. By not using it, productivity can be improved.

Hereinafter, a backlight assembly and a display device according to a second exemplary embodiment of the present invention will be described in detail with reference to FIGS. 9 and 10. 9 is a partially exploded perspective view of a light source unit and a light source unit fixing frame of the backlight assembly and display device according to the second embodiment of the present invention, and FIG. 10 is a state in which the light source unit and the light source unit fixing frame shown in FIG. 9 are fastened. It is a perspective view showing. Since the second embodiment of the present invention is the same as the first embodiment of the present invention except for the configuration of the light source unit and the light source unit fixing frame, the following description focuses on the differences.

9 and 10, in the second embodiment of the present invention, the circuit board 210 further includes a first fastening auxiliary hole 240 in addition to the fastening groove 230, and the light source unit fixing frame 300 is A second fastening auxiliary hole 360 formed to correspond to the first fastening auxiliary hole 240 is further included. By inserting the fastening auxiliary member 410 into the first fastening auxiliary hole 240 and the second fastening auxiliary hole 360, the fastening force of the light source unit 200 and the light source unit fixing frame 300 may be further strengthened.

The first fastening auxiliary hole 240 may be formed at an end portion of the circuit board 210 among areas where the point light source 220 is not mounted and areas where the fastening groove 230 is not formed. It may be formed to penetrate. The second fastening auxiliary hole 360 may correspond to the first fastening auxiliary hole 240 and may be formed on the frame sidewall part 320 of the light source unit frame 300. The second fastening auxiliary hole 360 may be formed inside the pin groove 350. The fastening auxiliary member 410 may be a screw, but is not limited thereto.

Hereinafter, a backlight assembly and a display device according to a third exemplary embodiment of the present invention will be described in detail with reference to FIGS. 11 and 12. FIG. 11 is a partially exploded perspective view of a light source unit and a light source unit fixing frame of the backlight assembly and display device according to the third embodiment of the present invention, and FIG. 12 is a state in which the light source unit and the light source unit fixing frame shown in FIG. 11 are fastened. It is a perspective view showing. Since the third embodiment of the present invention is the same as the first embodiment of the present invention except for the configuration of the light source unit and the light source unit fixing frame, the following description focuses on the differences.

11 and 12, in the third embodiment of the present invention, the circuit board 210 further includes a first fastening auxiliary hole 240 in addition to the fastening groove 230, and the light source unit fixing frame 300 is It further comprises a hook 420 formed corresponding to the first fastening auxiliary hole 240. As the hook 420 is inserted into the first fastening auxiliary hole 240, the fastening force of the light source unit 200 and the light source unit fixing frame 300 may be further strengthened.

The first fastening auxiliary hole 240 may be formed at an end portion of the circuit board 210 among areas where the point light source 220 is not mounted and areas where the fastening groove 230 is not formed. It may be formed to penetrate. The hook 420 may correspond to the first fastening auxiliary hole 240 and may be formed on the frame sidewall portion 320 of the light source unit frame 300. The hook 420 may be formed inside the pin groove 350.

Hereinafter, the backlight assembly and the display device according to the fourth exemplary embodiment of the present invention will be described in detail with reference to FIGS. 13 to 14. FIG. 13 is an exploded perspective view of a display device according to a fourth exemplary embodiment of the present invention, and FIG. 14 is a cross-sectional view taken along line D-D ′ of the display device of FIG. 13. Hereinafter, the same reference numerals are used for the components having the same functions as the first embodiment of the present invention, and the detailed description of the components is omitted or simplified for convenience of description.

13 and 14, the light source unit fixing frame may be integrally formed in the lower storage container 500. In this case, a part including the side walls 561 to 564 of the lower storage container 500 corresponds to the light source unit fixing frame described above. That is, the lower storage container 500 includes a bottom portion 565 and sidewall portions 561 to 564 disposed on four sides of the bottom portion 565. By combining the bottom part 565 and the four sidewall parts 561 to 564 to form a box shape having an open upper surface, the lower storage container 500 having a storage space of a predetermined depth may be formed.

In the fourth embodiment of the present invention, the light source unit 200 is disposed on two sidewall portions 561 and 562 facing each other among the four sidewall portions 561 to 564 of the lower storage container 500. The light source unit 200 is in direct contact with the side wall portions 561 and 562 of the lower storage container 500, and the side wall portions 561 and 562 on which the light source unit 200 is disposed are connected to the side wall portions of the intermediate frame 160. I am directly contacted. In FIG. 13, the light source unit 200 is disposed on two sidewall portions 561 and 562 facing each other among the four sidewall portions 561 to 564 of the lower storage container 500, but the present invention is limited thereto. The light source unit 200 may be disposed on only one sidewall of the four sidewall portions 561 to 564 of the lower storage container 500, or may be disposed on three or four sidewalls.

As shown in the first embodiment of the present invention, the protrusion 510, the stopper 540, and the pin groove 550 are formed on one surface of the side wall portions 561 and 562 in which the light source unit 200 is disposed.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10: backlight assembly 120: display panel assembly
130: optical sheet 140: light guide plate
150: reflective sheet 160: intermediate frame
170: lower storage container 200: light source unit
210: circuit board 220: point light source
230: fastening groove 300: light source unit fixing frame
310: protrusion 340: stopper
350: pin groove

Claims (22)

A light source unit including a circuit board including a fastening groove formed on one surface and a point light source mounted on the other surface of the circuit board opposite to the one surface; And
The light source unit is disposed on one surface, and includes a light source unit fixing frame including a protrusion formed on the one surface,
The protrusion is inserted into the fastening groove to engage the light source unit and the light source unit fixing frame, the depth of the fastening groove is smaller than the thickness of the circuit board. The method of claim 1,
The protrusion assembly is fixed to the other end of the fastening groove by sliding toward the other end from one end of the fastening groove into which the protrusion is inserted. The method of claim 2,
The length of the fastening groove is a backlight assembly longer than the length of the protrusion. The method of claim 2,
The protrusion has a dove tail shape in which a width in a direction perpendicular to the sliding direction decreases as the width approaches the one surface. The method of claim 4, wherein
The depth of the fastening groove is deeper as the closer to the other end from one end of the fastening groove. The method of claim 1,
And the protrusion is integrally formed with the light source unit fixing frame. The method of claim 1,
The light source unit fixing frame further includes a stopper formed at an end of the light source unit fixing frame to prevent movement of the light source unit. The method of claim 7, wherein
The stopper is integrally formed with the light source unit fixing frame and protrudes from one surface of the light source unit fixing frame. The method of claim 7, wherein
The light source unit fixing frame is formed inside the stopper, and further includes a pin groove formed in an area where the light source unit fixing frame and the light source unit overlap. The method of claim 1,
The circuit board further comprises a first fastening auxiliary hole. The method of claim 10,
The light source unit fixing frame further includes a second fastening auxiliary hole formed corresponding to the first fastening auxiliary hole,
The backlight assembly further comprises a fastening auxiliary member inserted into the first fastening auxiliary hole and the second fastening auxiliary hole. The method of claim 10,
The light source unit fixing frame further includes a hook formed corresponding to the first fastening auxiliary hole,
The backlight assembly into which the hook is inserted into the first fastening auxiliary hole. The method of claim 1,
And a storage container accommodating the light source unit and the light source unit fixing frame. The method of claim 13,
The light source unit is disposed on the side wall of the housing. The method of claim 13,
The light source unit fixing frame is made of aluminum having thermal conductivity and formed by extrusion processing. Light guide plate;
A light source unit disposed on one side of the light guide plate and including a circuit board including a fastening groove formed on one surface and a point light source mounted on the other surface of the circuit board opposite to the one surface; And
And a storage container accommodating the light guide plate and the light source unit and including a protrusion formed on one side wall on which the light source unit is disposed.
The protrusion is inserted into the fastening groove to engage the light source unit and the light source unit fixing frame, the depth of the fastening groove is smaller than the thickness of the circuit board. 17. The method of claim 16,
The protrusion assembly is fixed to the other end of the fastening groove by sliding toward the other end from one end of the fastening groove into which the protrusion is inserted. The method of claim 17,
The protrusion has a dove tail shape in which a width in a direction perpendicular to the sliding direction decreases as the width approaches the one surface. 19. The method of claim 18,
The depth of the fastening groove is deeper as the closer to the other end from one end of the fastening groove. 17. The method of claim 16,
The storage container further includes a stopper formed at an end of the one side wall to prevent movement of the light source unit. The method of claim 20,
The storage container further includes a pin groove formed inside the stopper and formed in an area where the light source unit fixing frame and the storage container overlap. A liquid crystal panel displaying an image;
A light guide plate disposed under the liquid crystal panel;
A light source unit disposed on one side of the light guide plate and including a circuit board including a fastening groove formed on one surface and a point light source mounted on the other surface of the circuit board opposite to the one surface;
A light source unit fixing frame having the light source unit disposed on one surface and including a protrusion formed on the one surface; And
A storage container for storing the light guide plate, the light source unit and the light source unit fixing frame,
And the protrusion is inserted into the fastening groove so that the light source unit and the light source unit fixing frame are fastened, and the depth of the fastening groove is smaller than the thickness of the circuit board.

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