KR101868539B1 - Backlight unit, display apparatus using the same, and lighting system including the same - Google Patents

Abstract

The present invention relates to a backlight unit, a display device using the same, and an illumination system including the backlight unit, wherein the backlight unit includes: first and second reflective portions; At least one light source module disposed between the first and second reflective portions; And a bottom cover for supporting the second reflector, wherein the bottom cover has a first side wall in which the light source module is disposed in the first direction; And a second sidewall extending from a distal end of the first sidewall in a second direction different from the first direction, wherein the inner side surface of the second sidewall protrudes more inward than the middle portion.

Description

BACKLIGHT UNIT, DISPLAY APPARATUS USING THE SAME, AND LIGHTING SYSTEM INCLUDING THE SAME

An embodiment relates to a backlight unit, a display device using the same, and an illumination system including the same.

In general, a typical large-sized display device includes a liquid crystal display (LCD) or a plasma display panel (PDP).

Unlike a self-luminous PDP, a backlight unit is indispensable because of the absence of its own light emitting device.

The backlight unit used in the LCD is divided into an edge type backlight unit and a direct-type backlight unit according to the position of the light source. In the edge type, a light source is disposed on the right and left sides and / It is possible to uniformly distribute the light uniformly over the entire surface, thereby making it possible to reduce the thickness of the panel.

The direct-type method is generally used for a display having a size of 20 inches or more. Since the light source is arranged at a lower part of the panel, the light efficiency is higher than that of the edge method.

A cold cathode fluorescent lamp (CCFL) was used as a light source for the backlight unit of the conventional edge type or direct type. However, since the backlight unit using CCFL is always supplied with power to the CCFL, a considerable amount of power is consumed. In addition to having a color reproduction rate of about 700% as compared with a cathode ray tube (CRT) There are disadvantages that cause environmental pollution problems.

BACKGROUND ART [0002] As a substitute product for solving the above problem, research on a backlight unit using a light emitting diode (LED) has been actively conducted.

When the LED is used as a backlight unit, it is possible to partially turn on / off the LED array, which can drastically reduce power consumption, Green, and B: Blue) LEDs can deliver more vivid image quality to consumers, exceeding 100% of the National Television System Committee (NTSC) color gamut specification.

In addition, the LED manufactured by the semiconductor process is characterized by being harmless to the environment.

Currently, LCD products employing LEDs having the above advantages are being marketed. However, since the conventional CCFL light source and driving mechanism are different, a driving driver and a printed circuit board (PCB) are expensive. Therefore, the LED backlight unit is only applied to expensive LCD products.

1 shows a plan view of a reflector 32 formed on a light source module 10 and 20 and a bottom cover 30 in a general two-edge type backlight unit.

The light source modules 10 and 20 shown in Fig. 1 may include a circuit board having an electrode pattern and a light source for generating light. At this time, the peripheral region of the center of the bottom cover 30 is at a distance far from the light emitted from the light source modules 10 and 20 when compared with other portions, so that the arm portions A and B can be formed . Therefore, improvement of the arm portions A and B is required.

Korean Patent Publication No. 10-2011-0108832 ("Light Emitting Device, Light Unit and Display Apparatus Having Same ", published on October 06, 2011)

Embodiments provide a backlight unit capable of providing uniform luminance and lowering the manufacturing cost, a display device using the backlight unit, and an illumination system including the backlight unit.

The backlight unit of the embodiment includes first and second reflective portions; At least one light source module disposed between the first and second reflective portions; And a bottom cover for supporting the second reflecting portion, wherein the bottom cover has a first side wall in which the light source module is disposed in a first direction; And a second sidewall extending from a distal end of the first sidewall in a second direction different from the first direction, wherein an inner side surface of the second sidewall has an edge portion closer to the edge portion protruding inward than a middle portion thereof .

Further, the protruding degree of the inner side surface of the second side wall may increase linearly or nonlinearly from the center portion toward the edge portion.

For example, the edge portion of the inner side of the second sidewall may protrude further than the center portion by 27 mm to 37 mm, and the light source module includes a light source and a circuit board on which the light source is mounted , And the light source may be disposed at a distance of 2 mm to 12 mm from the front end of the first sidewall.

The inner side surface of the second side wall has a plurality of inclined surfaces adjacent to each other about the at least one bent portion. The bent portion may be located at a central portion of the inner side surface. The curved portion is located closer to the distal end of the first sidewall than the central portion or the curved portion on the inner side of the second sidewall is located further from the distal end of the first sidewall than the central portion It may be located far away.

Further, the curvature radii or slopes of the plurality of inclined surfaces may be different from each other. The plurality of inclined surfaces may be formed to be symmetrical with respect to the central portion of the second sidewall.

In addition, the inner side surface of the second side wall may have a predetermined pattern. The density of the predetermined pattern may be reduced toward the edge portion of the second sidewall and may be increased toward the center portion. The density of the predetermined pattern may be different for each of the plurality of slopes. Further, at least one of the plurality of inclined surfaces may have the predetermined pattern of different density. The predetermined pattern may be formed to be symmetrical with respect to a central portion of an inner surface of the second side wall. In addition, the predetermined pattern may be in the form of a recess or a projection.

In the air guide type backlight unit according to the embodiment, since the inner side surface protrudes from the edge of the side wall of the bottom cover, the number of light sources can be reduced and the dark portion of the central portion of the bottom cover is removed, The manufacturing cost of the unit can be lowered and the reliability can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view of a reflection unit formed on a light source module and a bottom cover in a general two-edge type backlight unit. Fig.
2A and 2B are views for explaining a two-edge type backlight unit according to the embodiment.
FIG. 3A is a top perspective view of a bottom cover according to an embodiment, and FIG. 3B is a combined top view of a bottom cover and at least one light source module according to an embodiment.
4A to 4C are plan views illustrating a bottom cover and a light source module according to an embodiment of the present invention.
Figures 5A-5C show plan views of a second sidewall according to an embodiment.
6A to 6C are cross-sectional views of the second side wall of the bottom cover shown in FIG.
7 is a bottom perspective view of the bottom cover including the second reflector according to the embodiment.
8 is a view illustrating a display module having a backlight unit according to an embodiment.
9 and 10 are views showing a display device according to an embodiment.

Hereinafter, embodiments will be described with reference to the accompanying drawings.

In the description of this embodiment, in the case of being described as being formed "on" or "under" of each element, the upper (upper) or lower (lower) on or under is meant to encompass both that the two elements are in direct contact with each other or that one or more other elements are indirectly formed between the two elements do.

Also, when expressed in terms of "on" or "under", it may include not only an upward direction but also a downward direction based on one element.

2A and 2B are views for explaining a two-edge type backlight unit according to the embodiment. 2A is a top perspective view of a backlight unit, and FIG. 2B is a bottom perspective view of a backlight unit.

The backlight unit shown in FIGS. 2A and 2B includes at least one light source module 10, an optical member 40, a cover plate 50, a panel support 60, a bottom cover a cover 70, a first reflector 80, and a second reflector 82.

The light source module 10 may include a circuit board having an electrode pattern and a light source (or light emitting element) that generates light. At this time, at least one light source may be mounted on the circuit board, and an electrode pattern for connecting the adapter supplying the power source and the light source may be formed.

For example, a carbon nanotube electrode pattern for connecting a light source and an adapter may be formed on an upper surface of a circuit board. The circuit board may be a printed circuit board (PCB) on which a plurality of light sources are mounted, such as polyethylene terephthalate (PET), glass, polycarbonate (PC) . In addition, the circuit board may be a single layer PCB, a multilayer PCB, a ceramic substrate, a metal core PCB, or the like.

The light source may be a light emitting diode (LED) chip. The light emitting diode chip may be a blue LED chip or an ultraviolet LED chip. Alternatively, a red LED chip, a green LED chip, a blue LED chip, , And a white LED chip may be used.

The white LED may be implemented by combining a yellow phosphor on the blue LED or by using a red phosphor and a green phosphor simultaneously on the blue LED and a yellow phosphor, And a green phosphor may be simultaneously used.

At least one light source module 10 is disposed between the first reflector 80 and the second reflector 82. The light source module 10 may be disposed adjacent to the first reflector 80 or the second reflector 82. The light source module 10 may be disposed at a predetermined distance from the second reflecting portion 82 while being in contact with the first reflecting portion 80 or contacting the second reflecting portion 82, 1 reflector 80. The first reflector 80 may be spaced apart from the first reflector 80 by a predetermined distance. Alternatively, the light source module 10 may be spaced apart from the first reflector 80 and the second reflector 82, or may be disposed at the same time on the first reflector 80 and the second reflector 82 .

Further, the light exit surface of the light source module 10 may be arranged in various directions.

That is, the light source module 10 may be a direct emitting type structure in which the light exit surface is disposed so as to face the air guide direction between the optical member 40 and the second reflecting portion 82 And the light source module 10 may have an indirect emission structure in which the light exit surface is disposed to face either the first reflector 80, the second reflector 82, or the cover plate 50 . Here, in the indirect emission type light source module 10, the emitted light is reflected by the first reflector 80, the second reflector 82 and the cover plate 50, and the reflected light is again reflected by the air guide of the backlight unit Direction. The reason why the light source module 10 is disposed in the indirect emission structure is because it can reduce the hot spot phenomenon.

The first reflector 80 and the second reflector 82 are spaced apart from each other by a predetermined distance so as to have an air guide in the empty space between the first reflector 80 and the second reflector 82, have.

Here, the first reflector 80 has an open area and may be disposed on one side of the light source module 10 or spaced apart from the light source module 10 at regular intervals. That is, the first reflector 80 may have a central region opened, and the light source module 10 may be arranged to face opposite side edge regions of the first reflector 80. [

The first reflector 80 may be formed of any one of a reflective coating film and a reflective coating material layer so as to reflect the light generated from the light source module 10 toward the second reflector 82 have.

In addition, a sawtooth-shaped reflection pattern may be formed on the surface of the first reflector 80 facing the light source module 10, and the surface of the reflection pattern may be a flat surface or a curved surface.

The reason for forming the reflection pattern on the surface of the first reflector 80 is to reflect the light generated by the light source module 10 to the central region of the second reflector 82 to increase the brightness in the central region of the backlight unit .

The second reflector 82 is disposed on the inner surface of the bottom cover 70 at a predetermined distance from the light source module 10 and is disposed at a predetermined angle from a horizontal plane parallel to the surface of the first reflector 80 The inclined surface may have an inclined surface.

The inclined surface of the second reflector 82 reflects the light generated from the light source module 10 or the light reflected from the first reflector 80 to the open area of the first reflector 80 can do.

Further, the second reflecting portion 82 may include at least two inclined surfaces having at least one inflection point. In some cases, the center region of the second reflecting portion 82 may have a flat plane or a concave curved shape. That is, the central region of the second reflecting portion 82 may be a flat surface, a convex surface, or a concave surface, or may include a plurality of shapes.

Optionally, the light source module 10 may be spaced a first distance from the first reflector 80 and a second distance from the second reflector 82. Here, the second distance may be larger or smaller than the first distance. The reason is that the light generated by the light emitting module 10 is concentrated in the central region of the second reflector 82 to increase the brightness in the central region of the backlight unit.

The second reflector 82 is not parallel to the first reflector 80 and may be at least one of a flat surface, a flat inclined surface, a concave inclined surface, and a convex inclined surface.

The second reflector 82 may have a structure in which a reflective film is attached to a mold body having an inclined surface, a structure in which a reflective film having an inclined surface is attached to a mold body having a plane, Or may be a mold body itself having a photo reflecting surface.

Here, the reflective film may include at least one of a metal or a metal oxide, and may be a metal having a high reflectance such as aluminum (Al), silver (Ag), gold (Ag), or titanium dioxide (TiO ₂ ) Or a metal oxide.

The reflection patterns of the first and second reflectors 80 and 82 may be different from each other. That is, the first reflector 80 may have a regular reflection surface regularly reflecting light, and the second reflector 82 may have a diffusely reflective surface that irregularly reflects light. Alternatively, the first reflecting portion 80 may have a diffusing surface for diffusely reflecting light, and the second reflecting portion 82 may have a regular reflecting surface regularly reflecting the light.

In some cases, the second reflector 82 may be provided with a regular reflection surface in an area adjacent to the light source module 10, and a diffusing reflection surface in an area distant from the light source module 10.

On the other hand, the optical member 40 is supported by the cover plate 50 and can be arranged to face the second reflecting portion 82. [ Here, the optical member 40 is formed of at least one sheet, and may optionally include a diffusion sheet, a prism sheet, a brightness enhancement sheet, and the like. Here, the diffusion sheet diffuses the light emitted from the light source, the prism sheet guides the diffused light to the light emitting region, and the brightness diffusion sheet can enhance the brightness. At least one of the upper surface and the lower surface of the optical member 40 may have a concavo-convex shape for uniform diffusion of light.

Next, the cover plate 50 can be brought into contact with the first reflector 80 and the second reflector 82 and fixed to each other. Here, the cover plate 50 may be made of a material different from the bottom cover 70 including the second reflecting portion 82. That is, the cover plate 50 may be made of metal.

The panel support portion 60 covers a part of the cover plate 50 and can be fixedly disposed on the cover plate 50. [

The bottom cover 70 supporting the second reflecting portion 82 may be made of a polymer resin such as plastic to enable injection molding.

FIG. 3A is a top perspective view of the bottom cover 70 according to the embodiment, and FIG. 3B shows a combined top view of the bottom cover 70 and at least one light source module 10 according to the embodiment.

Referring to FIG. 3A, the bottom cover 70 has first and second sidewalls (or sidewall portions) 72 and 74. The light source module 10 is disposed in the first side wall 72 in the first direction. The second side wall 74 extends from the tip end 73 of the first side wall 72 in a second direction different from the first direction. According to the embodiment, at the inner surface of the second side wall 74, the edge portion 74a closer to the tip portion 73 projects further into the bottom cover 70 than the center portion 74b.

4A to 4C are plan views showing the bottom cover 70 and the light source module 10 according to the embodiment.

According to the embodiment, the degree of protrusion of the inner surface of the second side wall 74 of the bottom cover 70 can increase linearly from the center portion 74b toward the edge portion 74a.

For example, as shown in FIGS. 3A, 3B and 4B, the degree of protrusion of the inner surface of the second side wall 74 increases linearly from the center portion 74b toward the edge portion 74a . That is, the inner surface of the second sidewall 74 shown in Figs. 3A and 3B increases linearly in curve form toward the rim portion 74a, or the inner surface of the second sidewall 74 shown in Fig. And can linearly increase linearly toward the edge portion 74a.

According to another embodiment, the degree of protrusion of the inner surface of the second side wall 74 of the bottom cover 70 may increase non-linearly from the center portion 74b toward the edge portion 74a. For example, as shown in Figs. 4A and 4C, the degree of protrusion of the inner surface may increase nonlinearly from the center portion 74b to the edge portion 74a near the tip portion 73. [

For example, assuming that the center portion 74b of the inner side surface of the second side wall 74 is the center 74c of the inner side surface and the edge region 74a is the tip portion 73 of the first side wall 72 , The distal end portion 73 of the inner side surface of the second side wall 74 may protrude a distance d1 from the center of the inner side surface 74c as shown in Figs. 4A to 4C. For example, the distance d1 may be about 27 mm to 37 mm.

The light source 10A of the light source module 10 may be disposed at a distance of 2 mm to 12 mm from the distal end portion 73 of the second side wall 74.

Since the edge portion 74a of the inner side surface of the second side wall 74 of the bottom cover 70 protrudes more than the central portion 74b as described above, May be more reflected towards portion 74b. Therefore, the backlight unit according to the present embodiment can improve the dark portions A and B as shown in Fig. 1, and can provide a uniform luminance. In addition, in the case of the general backlight unit shown in Fig. 1, the light source is disposed at the distance d1, whereas in this embodiment, the light source does not need to be disposed at the distance d1. Therefore, the backlight unit according to the present embodiment can reduce the number of light sources as compared with a general backlight unit, so that the manufacturing cost is lowered.

Figures 5A-5C show plan views of a second sidewall 74 according to an embodiment.

According to the embodiment, the inner side surface of the second side wall 74 may have a plurality of inclined surfaces adjacent to each other around the at least one bent portion.

For example, the second sidewall 74 may have a shape as shown in FIG. 5A. 5A is a plan view of the second sidewall 74 shown in Figs. 3A and 3B, showing the difference in radius of curvature of the first and second sloped surfaces 91 and 92 on the inner side of the second sidewall 74. Fig. At this time, the curvature radius R1 of the first inclined surface 91 adjacent to the curved portion P at the inner side of the second side wall 74 is smaller than the curvature radius R2 of the second inclined surface 92 They may be different or the same.

The curved portion P between the first and second inclined surfaces 91 and 92 may be located at the center region 74b of the second side wall 74, for example, at the center 74c. Alternatively, the curved portion P may be located closer to the distal end 73 of the first side wall 72 than the center 74c on the inner side of the second side wall 74. Alternatively, the curved portion P on the inner side of the second side wall 74 may be located farther from the distal end 73 of the first side wall 72 than the center 74c.

If the curvature radius R1 of the first inclined surface 91 adjacent to the first side wall 72 is smaller than the curvature radius R2 of the second inclined surface 92, Lt; RTI ID = 0.0 > 72 < / RTI > However, if the curvature radius R1 of the first inclined surface 91 adjacent to the first side wall 72 is larger than the curvature radius R2 of the second inclined surface 92, 72). ≪ / RTI >

The maximum height H1 of the first inclined face 91 and the maximum height H2 of the second inclined face 92 may be the same or different from each other. The first length L1 between the bent portion P and the end of the first inclined face 91 is equal to the second length L2 between the bent portion P and the end of the second inclined face 92 May be different.

According to another embodiment, the second sidewall 74 may be implemented as shown in Figure 5B. 5B is a plan view of the second sidewall 74 shown in Fig. 4A. In Fig. 5B, a plurality of adjacent sipes P, P1, P2, P3 and P4 on the inner surface of the second sidewall 74 The curvature radius of the third to eighth inclined surfaces 93 to 98 of FIG.

The third and fourth inclined surfaces 93 and 94 are adjacent to each other with the bent portion P as a center and the third and fifth inclined surfaces 93 and 95 are adjacent to each other with the bent portion P1 as a center, And sixth inclined surfaces 95 and 96 are adjacent to each other with respect to the bent portion P2 and the fourth and seventh inclined surfaces 94 and 97 are adjacent to each other with respect to the bent portion P3, The eight inclined surfaces 97 and 98 are adjacent to each other about the bent portion P4.

For example, the radiuses of curvature R3 to R8 of the third to eighth inclined surfaces 93 to 98 on the inner surface of the second side wall 74 may be different from each other or may be the same. The heights H3 to H8 of the third to eighth slopes 93 to 98 may be the same or different from each other. In addition, the lengths L3 to L8 of the third to eighth slopes 93 to 98 may be the same or different from each other.

According to another embodiment, the second sidewall 74 may be implemented as shown in Figure 5C. 5C is a plan view of the second sidewall 74 shown in Fig. 4C. In Fig. 5C, the ninth to twelfth And the slopes of the slopes 99 to 102 are shown.

The ninth and tenth inclined surfaces 99 and 100 are adjacent to each other with respect to the bent portion P and the ninth and eleventh inclined surfaces 99 and 101 are adjacent to each other with respect to the bent portion P5, And the twelfth inclined faces 100 and 102 are adjacent to each other about the bent portion P6. For example, the slopes of the ninth to twelfth inclined surfaces 99 to 102 on the inner surface of the second side wall 74 may be different from each other or may be the same. The heights H9 to H12 of the ninth to twelfth inclined surfaces 99 to 102 may be the same or different from each other. In addition, the lengths L9 to L12 of the ninth to twelfth inclined surfaces 99 to 102 may be the same or different from each other.

The inclined surface formed on the inner surface of the second sidewall 74 may be formed to be symmetrical with respect to the center portion 74b of the second sidewall 74. For example, when the bent portion P is located at the center 74c of the second side wall 74, as shown in FIGS. 5A to 5C, the inner side portion of the second side wall 74 is bent at the bent portion P, As shown in FIG.

6A to 6C are sectional views of the second side wall 74 of the bottom cover 70 shown in FIG. 3B according to the embodiment as viewed from the 6-6 'direction. Even when the second sidewall 74 is formed as shown in Figs. 4A to 4C, the following description applies equally well, but is not limited thereto.

According to an embodiment, the inner surface of the second sidewall 74 of the bottom cover 70 may have a predetermined pattern 110. 6A to 6C, the density of the predetermined pattern 110 decreases from the center portion 74b toward the edge portion 73a of the second side wall 74, It can be pushed from the seat portion 74a toward the central portion 74b.

As described above, since the pattern 110 is reduced from the center portion 74b to the edge portion 74a and the pattern 110 is pressed from the edge portion 74b toward the center portion 74b, 10 is more reflected at the central portion 74b. Therefore, the arm portions A and B as shown in Fig. 1 can be improved.

Figs. 6A to 6C show the shapes of the patterns formed on the inclined surfaces, respectively, when the inclined surfaces of the inner surface of the second side wall 74 are formed as shown in Figs. 5A to 5C, respectively.

According to the embodiment, the density of the predetermined pattern on the inner surface of the second side wall 74 may be the same for each of the plurality of slopes. For example, as shown in FIG. 6B or 6C, the densities of the patterns formed on the third and fourth inclined faces 93 and 94 are the same and the density of the pattern formed on the fifth and seventh inclined faces 95 and 97 The densities are the same, and the densities of the patterns formed on the sixth and eighth inclined surfaces 96 and 98 may be equal to each other.

Alternatively, the density of the predetermined pattern on the inner surface of the second side wall 74 may be different for each of the plurality of inclined surfaces. For example, as shown in FIG. 6B, the densities of the patterns formed on each of the fourth, seventh, and eighth slopes 94, 97, and 98 are different, and the third, fifth, and sixth slopes 93, 95 and 96 are different from each other in density.

At least one of the plurality of inclined surfaces formed on the inner side surface of the second side wall 74 may have a predetermined pattern of different densities. That is, the pattern formed on one inclined surface may have various pattern densities. 6A, the density of the pattern formed on the center portion 74b of the first inclined surface 91 is dense, while the density of the pattern formed on the edge portion 74a is small.

6A to 6C, the predetermined pattern may be formed to be symmetrical with respect to the center portion 74b of the second side wall 74, but the present embodiment is not limited to this.

According to an embodiment, the predetermined pattern formed on the inner side of the second sidewall 74 may be recessed or protruding, but it is contemplated that various forms of the pattern may be formed on the inner surface have.

7 is a bottom perspective view of the bottom cover 70 including the second reflector 82 according to the embodiment.

As shown in FIG. 7, the bottom cover 70 may be provided with a plurality of reinforcing ribs 71 on the lower surface thereof. The reason is that the second reflecting portion 82 is a reflecting surface having a curved surface, and thus can be deformed by external environmental conditions. Therefore, a reinforcing rib 71 is provided to prevent this. The reinforcing ribs 71 may be disposed not only on the rear surface facing the inclined surface of the second reflective portion 82 but also on the rear surface facing the side surface of the second reflective portion 82.

The bottom cover 70 may further include a support pin 79 for supporting the optical member 40 on the upper surface of the second reflecting portion 82. Since the optical member 40 is separated from the second reflecting portion 82 and the air guide is formed therebetween, the supporting pin 79 is formed because the central region of the optical member 40 can be lowered . To this end, it may be stable that the area of the lower surface of the support pin 79 contacting the second reflector 82 is larger than the area of the upper surface.

8 is a view illustrating a display module having a backlight unit according to an embodiment.

As shown in FIG. 8, the display module 200 may include a display panel 210 and a backlight unit 220.

The display panel 210 includes a color filter substrate 212 and a TFT (Thin Film Transistor) substrate 214 bonded to each other to maintain a uniform cell gap, A liquid crystal layer (not shown) may be interposed.

The upper polarizer 216 and the lower polarizer 218 may be disposed on the upper side and the lower side of the display panel 210 and more specifically the upper polarizer 216 may be disposed on the upper surface of the color filter substrate 212 And the lower polarizer plate 218 may be disposed on the lower surface of the TFT substrate 214.

Although not shown, a gate and a data driver for generating a driving signal for driving the panel 210 may be provided on a side surface of the display panel 210.

9 and 10 are views showing a display device according to an embodiment.

9, the display device 300 includes a display module 200, a front cover 310 and a back cover 320 surrounding the display module 200, a driving unit 330 provided in the back cover 320, And a driving unit cover 340 surrounding the driving unit 330.

The front cover 310 may include a transparent front panel (not shown) for transmitting light. The front panel may protect the display module 200 at a predetermined interval, and the light emitted from the display module 200 So that an image displayed on the display module 200 is displayed from the outside.

The back cover 320 may be coupled with the front cover 310 to protect the display module 200.

The driving unit 330 may be disposed on one side of the back cover 320.

The driving unit 330 may include a driving control unit 332, a main board 334, and a power supply unit 336.

The driving control unit 332 may be a timing controller and is a driving unit for adjusting the operation timing of each driver IC of the display module 200. [ The main board 334 is a driving unit for transmitting V-sync, H-sync, and R, G, and B resolution signals to the timing controller. The power supply unit 336 is a driving unit for applying power to the display module 200.

The driving unit 330 may be provided on the back cover 320 and may be surrounded by the driving unit cover 340.

The back cover 320 may include a plurality of holes to connect the display module 200 and the driving unit 330 and a stand 350 for supporting the display device 300.

10, the driving control unit 332 of the driving unit 330 is provided in the back cover 320, and the main board 334 and the power supply unit 336 may be provided in the stand 350 have.

The driving unit cover 340 may cover only the driving control unit 332 provided in the back cover 320.

In the embodiment, the main board 334 and the power supply unit 336 are separately formed. However, the present invention is not limited thereto.

Still another embodiment may be embodied as a backlight unit described in the above embodiments, for example, a display device including a light source module 10, first and second reflectors 80 and 82, a pointing device, and a lighting system For example, the lighting system may include a lamp, a streetlight.

Such a lighting system can be used as an illumination light for collecting light by focusing a plurality of LEDs. In particular, it can be used as an embedded light (down light) to be embedded in a ceiling or a wall of a building so that the opening side of the shade can be exposed. have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

10: light source module 30, 70: bottom cover
32, 82: second reflecting portion 40: optical member
50: cover plate 60: panel support
71: reinforcing rib 72: first side wall
73: tip portion 74: second side wall
79: Support pins 91 to 102:
110: pattern 200: display module
212, 214: substrate 216: upper polarizer
218: lower polarizer plate 220: backlight unit
300: Display device 310: Front cover
320: back cover 330:
340: drive cover 350: stand

Claims (20)

First and second reflecting portions;
At least one light source module disposed between the first and second reflective portions; And
And a bottom cover for supporting the second reflecting portion,
The bottom cover
A first sidewall in which the light source module is disposed in a first direction; And
And a second sidewall extending from a distal end of the first sidewall in a second direction different from the first direction,
Wherein an inner side surface of the second side wall protrudes more inward than a center portion of an edge portion close to the tip portion,
Wherein the inner side surface of the second side wall has a plurality of inclined surfaces adjacent to each other about the at least one bent portion,
And the bent portion is located at a central portion of the inner side surface of the second side wall. delete delete 2. The connector according to claim 1, wherein the edge portion of the inner side surface of the second side wall protrudes inward by 27 mm to 37 mm more than the center portion,
Wherein the light source module includes a light source and a circuit board on which the light source is mounted,
Wherein the light source is spaced apart from the front end of the first sidewall by 2 mm to 12 mm. delete delete delete The apparatus according to claim 1, wherein the bent portion on the inner side of the second side wall is located closer to the leading end of the first side wall than the central portion,
And the projected degree of the inner side surface of the second side wall increases linearly from the center portion toward the edge portion. The apparatus according to claim 1, wherein the curved portion on the inner side of the second side wall is located farther from the distal end of the first side wall than the central portion,
And the projected degree of the inner side surface of the second sidewall increases nonlinearly from the central portion to the edge portion. The apparatus according to claim 1, wherein the curvature radii of the plurality of inclined surfaces are different from each other,
The slopes of the plurality of slopes differ from each other,
Wherein the plurality of inclined surfaces are formed to be symmetrical with respect to the center portion of the second sidewall. delete delete 2. The apparatus of claim 1, wherein the inner side surface of the second side wall has a predetermined pattern,
The density of the predetermined pattern gradually decreases toward the edge portion of the second sidewall and tapers toward the center portion,
Wherein the density of the predetermined pattern is different for each of the plurality of slopes,
Wherein the predetermined pattern is formed to be symmetrical with respect to a central portion of the inner side surface of the second side wall. delete delete delete delete delete delete First and second reflecting portions;
At least one light source module disposed between the first and second reflective portions; And
And a bottom cover for supporting the second reflecting portion,
The bottom cover
A first sidewall in which the light source module is disposed in a first direction; And
And a second sidewall extending from a distal end of the first sidewall in a second direction different from the first direction,
Wherein an inner side surface of the second side wall protrudes more inward than a center portion of an edge portion close to the tip portion,
Wherein the inner side surface of the second side wall has a plurality of inclined surfaces adjacent to each other about the at least one bent portion,
Wherein the bent portion is located at a central portion of the inner side surface of the second side wall.

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