KR20130066955A - Backlight unit, display apparatus using the same, and lighting system including the same - Google Patents

Abstract

PURPOSE: A backlight unit, a display device using the same, and an illumination system including the same are provided to simplify a manufacturing process since an illumination system inserts an engagement protrusion of a bottom cover to an engagement hole of a cover plate. CONSTITUTION: At least one light source module is arranged in between a first reflection unit and a second reflection unit. A cover plate supports the first reflection unit and includes at least one engagement hole(210) to a side wall. A bottom cover(100) supports the second reflection unit and includes an engagement protrusion(110) insertion-capably protruded into the engagement hole. The cover plate is mounted on the bottom cover as the engagement protrusion is inserted into the engagement hole.

Description

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

Embodiments relate to a backlight unit, a display device using the same, and a lighting system including the same.

In general, typical large display devices include a liquid crystal display (LCD) or a plasma display panel (PDP).

Unlike the self-luminous PDP, an LCD requires a separate backlight unit due to the absence of its own light emitting device.

The backlight unit used in the LCD is classified into an edge type backlight unit and a direct type backlight unit according to the position of the light source. In the edge type, the light source is disposed on the left and right sides and / or the upper and lower sides of the LCD panel. It evenly distributes the light evenly on the front side, so the light uniformity is excellent and the panel thickness can be made ultra thin.

The direct method is a technology generally used for a display of 20 inches or more. Since a plurality of light sources are disposed under the panel, it has an advantage of superior light efficiency compared to an edge method, and thus is mainly used for a large display requiring high brightness.

Cold Cathode Fluorescent Lamp (CCFL) was used as the light source of the conventional edge or direct backlight unit. However, the CCFL-based backlight unit consumes a considerable amount of power since the CCFL is always powered, and has not only about 70% color reproducibility as compared to cathode ray tubes (CRT), but also due to the addition of mercury. It has the disadvantage of causing environmental pollution problems.

As a substitute for solving the above problems, research on a backlight unit using a light emitting diode (LED) has been actively conducted.

When the LED is used as a backlight unit, the LED array can be partially turned on and off, which can drastically reduce the power consumption. Green, B: Blue LEDs can exceed 100% of the National Television System Committee (NTSC) color gamut specification to provide consumers with more vivid picture quality.

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

LCD products employing LEDs with the above advantages are currently being released, but the driving mechanism and the printed circuit board (PCB) are expensive because the existing CCFL light source and the driving mechanism are different. Therefore, the LED backlight unit is still applied only to expensive LCD products.

1 is a cross-sectional view of a general two-edge type backlight unit, which includes a light source module 10, a first reflector 20, a second reflector 30, an optical member 40, and a cover. It consists of a cover plate 50, a bottom cover (or bottom chassis) 60 and a screw 70.

Referring to FIG. 1, the light source module 10 may include a light emitting element 12 for generating light and a circuit board 14 having an electrode pattern. The first reflector 20 reflects the light generated by the light emitting element 12 toward the second reflector 30. The cover plate 50 supports the light source module 10, the first reflecting unit 20, and the optical member 40, and the bottom cover 60 supports the second reflecting unit 30.

FIG. 2 is a schematic perspective view illustrating a state in which the cover plate 50 and the bottom cover 60 shown in FIG. 1 are coupled to each other.

Referring to FIG. 2, in general, the cover plate 50 is slid into the side wall of the bottom cover 60 in the direction of the arrow 80 and then mounted to the bottom cover 60 by screws 70 or the like. In this way, in order to attach the cover plate 50 to the bottom cover 60, the screw 70 or the like is required, which makes the backlight unit manufacturing process cumbersome.

Republic of Korea Patent Publication No. 10-2011-0108832 ("light emitting device, light unit and display device having the same", published October 06, 2011)

Embodiments provide a backlight unit, a display device using the same, and a lighting system including the same, which can simplify the manufacturing process and reduce manufacturing costs, thereby improving productivity.

In an embodiment, the backlight unit may include: first and second reflectors; At least one light source module disposed between the first reflecting unit and the second reflecting unit; A cover plate supporting the first reflection part and having at least one fastening hole in a sidewall thereof; And a bottom cover supporting the second reflecting portion and having a fastening protrusion protruding to be inserted into the fastening hole, wherein the fastening protrusion is fitted into the fastening hole so that the cover plate is mounted to the bottom cover.

The fastening protrusion may further include a pillar protruding in a first direction from a side wall of the bottom cover; And an upper plate extending from the pillar in a second direction different from the first direction. For example, the top plate may be any one of oval, circular, semicircular and polygonal. The fastening hole may include a first region having a size and a shape into which the top plate can be inserted; A second region having a size suitable for fixing the pillar; And a third region forming a path in which the fastening protrusion slides from the first region to the second region.

The bottom cover may further include at least one support part protruding in the first direction to receive the cover plate. The cover plate may further include a first groove suitable for fitting the support part in the second direction. For example, the first groove may have an oval, circular, semicircular or polygonal shape.

In addition, when the support is fitted in the first groove, the outermost protruding surface of the support may be coplanar with the outer surface of the side wall of the cover plate.

In addition, the bottom cover may further include at least one stopper protruding in a direction preventing the transverse side of the cover plate from at least one of the front end portion of the side wall of the bottom cover. The stopper may protrude from at least one of an upper surface and a side surface of the tip portion of the side wall of the bottom cover.

The bottom cover may further include a second groove into which the light source module can be inserted into at least one of the front end portions of the side walls. The second groove may be formed at an edge of the tip portion.

Since the embodiments mount the cover plate to the bottom cover by inserting the bottom cover fastening protrusion into the fastening hole of the cover plate, screws are not required, thereby simplifying the manufacturing process and reducing the manufacturing cost, thus improving productivity of the backlight unit. Can improve.

1 is a cross-sectional view of a typical two-edge type backlight unit.
FIG. 2 is a schematic perspective view illustrating a state in which the cover plate and the bottom cover illustrated in FIG. 1 are combined.
3 is a cross-sectional view for describing a two-edge type backlight unit according to an embodiment.
4A and 4B show perspective views before and after the cover plate is mounted on the bottom cover according to the embodiment, respectively.
5 is an enlarged perspective view illustrating a portion 'A' shown in FIG. 4A according to an embodiment.
6A and 6B illustrate cross-sectional views of the fastening protrusion shown in FIG. 5 according to an embodiment.
7A and 7B are diagrams for describing a process in which the cover plate illustrated in FIG. 4A is mounted on a bottom cover, according to an exemplary embodiment.
8 is an enlarged perspective view illustrating a portion 'B' illustrated in FIG. 4B according to an embodiment.
9A to 9C are enlarged perspective views illustrating respective parts shown in FIG. 4B according to an embodiment.
10 illustrates a display module having a backlight unit according to an embodiment.
11 and 12 illustrate a display apparatus according to an embodiment.

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

In the description of this embodiment, when described as being formed on the "top" or "bottom" (on or under) of each element, the top (bottom) or bottom (bottom) (on or under) includes both elements that are in direct contact with each other or one or more other elements are formed indirectly between the two elements. do.

In addition, when expressed as "on" (on) or "under" (under) may include the meaning of the downward direction as well as the upward direction based on one element (element).

3 is a cross-sectional view for describing a two-edge type backlight unit according to an embodiment.

As shown in FIG. 3, the backlight unit may include a bottom cover (or bottom chassis) 100, a cover plate 200, at least one light source module 400, It may include a first reflector 500, a second reflector 600, and an optical member 700.

The light source module 400 may include a light source (or a light emitting device) 402 for generating light and a circuit board 04 having an electrode pattern. In this case, the light source 402 may be a light emitting diode chip, and the light emitting diode chip may include a blue LED chip or an ultraviolet LED chip, or a red LED chip, a green LED chip, a blue LED chip, and yellow green. ) It may be configured in a package form combining at least one or more of the LED chip, the white LED chip.

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.

In addition, at least one light source 402 may be mounted on the circuit board 404, and an electrode pattern for connecting the power supply adapter and the light source 402 may be formed.

For example, a carbon nanotube electrode pattern for connecting the light source 402 and the adapter may be formed on the upper surface of the circuit board 404. The circuit board 404 may be made of polyethylene terephthalate (PET), glass, polycarbonate (PC), silicon (Si), or the like, and may be a printed circuit board (PCB) on which a plurality of light sources are mounted. It may be formed in the form. In addition, the circuit board 404 may selectively use a single layer PCB, a multilayer PCB, a ceramic substrate, a metal core PCB, or the like.

In addition, the light exit surface of the light source module 400 may be arranged in various directions.

The light source module 400 may have a direct emitting type structure in which the light emitting surface is disposed to face an air guide direction between the optical member 700 and the second reflector 600.

Alternatively, the light source module 400 may have an indirect emission type structure in which the light exit surface is disposed in one of the directions of the first reflector 500, the second reflector 600, and the cover plate 200. . In this case, the indirectly emitted light source module 400 reflects the emitted light from the first reflector 500, the second reflector 600, and the cover plate 200, and the reflected light is again guided by the air of the backlight unit. You can go in the direction. As such, the reason for arranging the light source module 400 in an indirect light emitting structure is that a hot spot phenomenon can be reduced.

The light source module 400 may be disposed between the first reflector 500 and the second reflector 600, adjacent to the 500 and 600.

In some cases, the light source module 400 may be disposed at a distance from the second reflector 600 at the same time as being in contact with the first reflector 500, or at the same time as being in contact with the second reflector 600. 1 may be disposed at a predetermined distance from the reflector 500.

Alternatively, the light source module 400 may be disposed apart from the first reflector 500 and the second reflector 600 by a predetermined distance, or simultaneously with the first reflector 500 and the second reflector 600. May be contacted.

If the light source module 400 is spaced apart from the first reflector 500 by a first distance and is spaced apart from the second reflector 600 by a second distance, the second distance may be larger or smaller than the first distance. Can be. The reason for this is to concentrate the light generated by the light source module 400 in the central region of the second reflector 600, so as to increase the luminance in the central region of the backlight unit.

Next, the first reflector 500 and the second reflector 600 may face each other at a predetermined interval so as to have an air guide in the empty space between the first reflector 500 and the second reflector 600. have.

Here, the first reflector 500 may have an open area and may be disposed in contact with one side of the light source module 400 or spaced at a predetermined interval. That is, the central region of the first reflector 500 is open, and the light source module 400 may be disposed to face each other at both edge regions of the first reflector 500.

In addition, the first reflector 500 may be formed of any one of a reflective coating film and a reflective coating material layer, and may serve to reflect light generated from the light source module 400 in the direction of the second reflector 600. have.

In addition, a serrated reflection pattern is formed on a surface of the first reflector 500 facing the light source module 400, and the surface of the reflective pattern may be flat or curved.

The reason for forming the reflective pattern on the surface of the first reflector 500 is to reflect the light generated by the light source module 400 to the central region of the second reflector 600, thereby increasing the luminance in the central region of the backlight unit. To do so.

Meanwhile, the second reflector 600 is supported by the bottom cover 100, and the light generated by the light source module 400 or the light reflected from the first reflector 500 is opened in the first reflector 500. It may serve to reflect the area.

The second reflector 600 may have an inclined surface that is inclined at an angle from a horizontal plane parallel to the surface of the first reflector 500. That is, the second reflector 600 is not parallel to the first reflector 500, and may be at least one of a flat, a flat inclined plane, a concave inclined plane, and a convex inclined plane.

In detail, the second reflector 600 may include a plurality of first and second inclined surfaces 601 and 603 that meet each other at the inflection portion P. FIG. In some cases, the central area 620 of the second reflector 600 may be a flat plane, a concave curved surface or a convex curved surface, or may include a plurality of shapes.

In addition, the first and second inclined surfaces 601 and 603 of the second reflector 600 may be formed to be symmetric with respect to the center area 620 of the 600. The radii of curvature R1 and R2 of the first and second inclined surfaces 601 and 603 which are adjacent to each other about the inflection portion P in the second reflector 600 may be different from each other.

The inflection P between the first and second inclined surfaces 601 and 603 of the second reflector 600 may be located in an area adjacent to the light source module 400, but from the light source module 400. It may be located in a remote area.

The first inclined surface 601 is adjacent to the light source module 400, and the radius of curvature R1 of the first inclined surface 601 may be smaller than or larger than the radius of curvature R2 of the second inclined surface 603. have. In some cases, the radius of curvature R1 of the first inclined surface 601 may be the same as the radius of curvature R2 of the second inclined surface 603.

If the radius of curvature R1 of the first inclined surface 601 adjacent to the light source module 400 is smaller than the radius of curvature R2 of the second inclined surface 603, the inflection portion P is applied to the light source module 400. It may be located in an area of the adjacent second reflector 600. However, when the radius of curvature R1 of the first inclined surface 601 adjacent to the light source module 400 is greater than the radius of curvature R2 of the second inclined surface 603, the inflection portion P is the light source module 400. It may be located in the area of the second reflector 600 far from the second reflector 600.

In addition, the reflective patterns of the first reflector 500 and the second reflector 600 may be different from each other. That is, the first reflector 500 may have a specular reflection surface that specularly reflects light, and the second reflector 600 may have a diffuse reflection surface that diffusely reflects light. Alternatively, the first reflector 500 may have a diffuse reflection surface that diffusely reflects light, and the second reflector 600 may have a specular reflection surface that specularly reflects light.

In some cases, the second reflector 600 may arrange the specular reflection surface in an area adjacent to the light source module 400, and may arrange the diffuse reflection surface in an area far from the light source module 400.

In addition, the second reflector 600 may have a structure in which a reflective film is attached to the bottom cover 100 having an inclined surface, or may have a structure in which a reflective film having an inclined surface is attached to the bottom cover 100 having a flat surface. The bottom cover 100 itself having an inclined reflective surface may be used.

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

If the second reflecting part 600 is attached to the bottom cover 100 in the form of a reflective film or the bottom cover 100 itself having an inclined reflecting surface, the bottom cover 100 is formed as shown in FIG. The second reflector 600 may have the same structure.

Meanwhile, the optical member 700 is supported by the cover plate 200 and disposed to face the second reflector 600. In addition, the optical member 700 may be formed of at least one sheet, and may optionally include a diffusion sheet, a prism sheet, a brightness enhancement sheet, and the like. Alternatively, the optical member 700 may be formed in a plate shape through injection.

Here, the diffusion sheet diffuses the light generated from the light source 402 and the light reflected by the first and second reflectors 500 and 600. At this time, the optical member 700 transmits the diffused light. The prism sheet guides the diffused light to the light emitting region, and the luminance diffusion sheet may enhance the luminance.

Next, as described above, the cover plate 200 may not only support the optical member 700 but also support the light source module 400 and the first reflector 500 and is mounted on the bottom cover 100. Here, the material of the cover plate 200 may be different from the material of the bottom cover 100. That is, the cover plate 200 may be made of metal, and the bottom cover 100 may be made of a polymer resin such as plastic to enable injection molding.

Hereinafter, the cover plate 200 and the bottom cover 100 according to the embodiment will be described as follows with reference to the accompanying drawings.

4A illustrates a perspective view before the cover plate 200 is mounted on the bottom cover 100, and FIG. 4B illustrates a perspective view after the cover plate 200 is mounted on the bottom cover 100.

The cover plate 200 shown in FIGS. 4A and 4B has at least one fastening hole 210 in the side surface 202a of the side wall 202 of the 200. In addition, the bottom cover 100 has a fastening protrusion 110 protruding to be inserted into the fastening hole 210 of the cover plate 200. Therefore, according to the embodiment, the fastening protrusion 110 of the bottom cover 100 is fitted into the fastening hole 210 of the cover plate 200, so that the cover plate 200 may be mounted on the bottom cover 100. have.

FIG. 5 is an enlarged perspective view of portion 'A' illustrated in FIG. 4A.

Referring to FIG. 5, the bottom cover 100 includes a fastening protrusion 110 and a support part 120, and the cover plate 200 includes a fastening hole 210, a first groove 220, and an optical member fixing part ( 230).

6A and 6B are cross-sectional views of the fastening protrusion 110 shown in FIG. 5, and FIG. 6A is a cross-sectional view taken along the line 6a-6a 'shown in FIG. 5, and FIG. 6B is shown in FIG. 5. The cross section cut along the line 6b-6b 'is shown.

6A and 6B, the fastening protrusion 110 includes a pillar 112 and an upper plate 114. The pillar 112 of the fastening protrusion 110 protrudes in the first direction x from the side surface 102a of the side wall 102 of the bottom cover 100. In addition, the upper plate 114 of the fastening protrusion 110 extends from the pillar 112 in a second direction different from the first direction x. The second direction may be perpendicular (y and z) to the first direction x.

In FIG. 5, the top plate 114 has a rectangular shape, but is not limited thereto. That is, the top plate 114 may have a shape of any one of oval, circular, semicircular and other polygons.

In this case, referring to FIG. 5, the cover plate 200 has a fastening hole 210 corresponding to the fastening protrusion 110 provided in the bottom cover 110. The fastening hole 210 has first, second and third regions A1, A2 and A3.

The first area A1 has a size and shape into which the upper plate 114 of the fastening protrusion 110 can be inserted. As shown, since the top plate 114 of the fastening protrusion 110 has a rectangular shape, the first area A1 has a rectangular shape. In addition, in the fastening protrusion 110, the horizontal length L1 of the upper plate 114 is smaller than the horizontal length L3 of the first area A1, and the vertical length L2 of the upper plate 114 is the first area A1. Is smaller than the vertical length (L4). Therefore, the upper plate 114 of the fastening protrusion 110 may be inserted into the first area A1 of the fastening hole 210.

The second area A2 has a size suitable for fixing the pillar 112 of the fastening protrusion 110. That is, when the pillar 114 is fitted in the second area A21, the pillar shown in FIG. 6B so as not to have much play between the pillar 112 and the cover plate 200 in the second area A2. The width w1 of 112 may be slightly smaller than the width of the second area A2.

The third region A3 forms a path in which the fastening protrusion 110 slides from the first region A1 to the second region A2. As will be described later, the fastening protrusion 110 is first inserted into the first area A1 of the fastening hole 210 in the direction of the arrow 300, and then the second area A2 via the third area A3. Slide in the direction of arrow 302. At this time, in order for the fastening protrusion 110 to slide from the first area A1 to the second area A2 through the third area A3, the length L5 of the pillar 112 shown in FIG. 6A is covered. It may be larger than the thickness t of the plate 200, and the height L6 of the pillar 112 may be smaller than the height L7 of the third region A3.

Referring back to FIG. 5, the support part 120 of the bottom cover 100 protrudes in the first direction x to serve to lift the cover plate 200. To this end, as shown in FIG. 4A, a plurality of supports 120 may be provided on the side surface 102a of the side wall 102 of the bottom cover 100. Corresponding to the tooth 120, the cover plate 200 has a first groove 220. The first groove 220 has a shape and size suitable for fitting the support portion 120 of the bottom cover 100. For example, the horizontal length L8 of the first groove 220 is greater than the horizontal length L10 of the support 120, and the vertical length L9 of the first groove 220 is the vertical length L11 of the support 120. May be greater than). In addition, when the thickness w3 of the support part 120 is smaller than the length L9, the support part 120 may be completely fitted into the first groove 220.

As shown in FIG. 5, the first groove 220 may have a rectangular shape, but is not limited thereto. For example, the first groove 220 may have an oval, circular, semicircular or other polygonal shape. In this case, in order for the support 120 to fit in the first groove 220, the support 120 may also have a shape corresponding to the shape of the first groove 220.

In addition, the support 120 is formed on the side surface 102a of the side wall 102 of the bottom cover 100, but is not limited thereto. That is, if the support part 120 can support the cover plate 200, it may be formed in the middle or the top of the side surface (102a).

7A and 7B are diagrams for describing a process in which the cover plate 200 illustrated in FIG. 4A is mounted on the bottom cover 100.

The cover plate 200 is fitted to the bottom cover 100 in the arrow direction 300 shown in FIGS. 4A and 5 as shown in FIG. 7A. At this time, the fastening protrusion 110 is inserted into the fastening hole 210.

Thereafter, the cover plate 200 is slid in the arrow direction 302 shown in FIG. 7A. In this case, as described above, the fastening protrusion 110 moves from the first area A1 to the second area A2 via the third area A3, and the first groove 220 is supported by the support part 120. Will approach. In this case, the first distance d1 illustrated in FIG. 5 may be the same as the second distance d2 in order to approach the first groove 220 so that the first groove 220 may be fitted into the support 120. Here, the first distance d1 is a distance from the center of the second area A2 to the first groove 220, and the second distance d2 is a distance from the center of the fastening protrusion 110 to the support part 120. Distance.

Thereafter, the support 120 approaches the first groove 220 so that the fastening protrusion 110 moves close to the second area A2 from the first area A1 of the fastening hole 210. When the cover plate 200 is pressed toward the bottom cover 100 in the arrow direction 304 shown in FIG. 7B, the cover plate 200 is mounted on the bottom cover 100 as shown in FIG. 4B.

FIG. 8 is an enlarged perspective view of portion 'B' illustrated in FIG. 4B.

5 and 8, when the length L11 is equal to the thickness t, when the support part 120 is fitted into the first groove 220, the outermost protruding surface 122 of the support part 120 is provided. ) May lie on the same horizontal plane as the outer surface 206 of the side surface 202a of the cover plate 200. This is to prevent a smooth appearance when the support part 120 protrudes to the outer surface 206.

9A to 9C are enlarged perspective views illustrating respective parts shown in FIG. 4B. FIG. 9A illustrates an enlarged perspective view of portion 'C' illustrated in FIG. 4B, and FIG. 9B illustrates an enlarged portion 'D' illustrated in FIG. 4B when the light source module 400 is not coupled to the cover plate 200. 9C is an enlarged perspective view of the portion 'D' shown in FIG. 4B when the light source module 400 is coupled to the cover plate 200.

In addition, according to the embodiment, the bottom cover 110 may further include stoppers 130A and 130B.

4A, 9A, and 9B, the stoppers 130A and 130B extend in the transverse axis z of the cover plate 200 at at least one of the tip portions 104a and 104b of the side wall 102 of the bottom cover 100. ) Is projected in the direction (x or y) to block. For example, the stoppers 130A and 130B may be formed on the top surface 102b and the side surface 102a of the tip portions 104a and 104b of the side wall 102 of the bottom cover 100, respectively. That is, the stopper 132A protrudes in the direction y from the upper surface 102b of the tip portion 104a of the bottom cover 100, and the stopper 134A is the side surface of the tip portion 104a of the bottom cover 100. It protrudes in the direction x at 102a. Further, the stopper 132B protrudes in the direction y from the upper surface 102b of the tip portion 104b of the bottom cover 100, and the stopper 134B is the side surface of the tip portion 104b of the bottom cover 100. It protrudes in the direction x at 102a.

According to an embodiment, a second groove into which the light source module 400 can be inserted may be formed in one of the tip portions 104a and 104b of the sidewall 102 of the bottom cover 100.

For example, referring to FIGS. 4A and 9B, a second groove 140 into which the light source module 400 may be inserted may be formed at an edge of the tip portion 104b of the side wall 102 of the bottom cover 100. . Accordingly, the light source module 400 may be inserted through the second groove 140 as shown in FIG. 9C.

In addition, the cover plate 200 may further include an optical member fixing part 230 protruding in the y direction from the upper surface 202b of the side wall 202. Here, the optical member fixing part 230 serves to fix the optical member 700 supported on the upper portion of the cover plate 200, as shown in FIG. 3.

10 illustrates a display module having a backlight unit according to an embodiment.

As shown in FIG. 10, the display module 900 may include a display panel 910 and a backlight unit 920.

The display panel 910 includes a color filter substrate 912 and a thin film transistor (TFT) substrate 914 bonded to face each other to maintain a uniform cell gap. The display panel 910 includes two substrates 912 and 914. A liquid crystal layer (not shown) may be interposed therebetween.

In addition, an upper polarizer 916 and a lower polarizer 918 may be disposed above and below the display panel 910, and more specifically, an upper polarizer 916 may be disposed on an upper surface of the color filter substrate 912. The lower polarizer 918 may be disposed on the bottom surface of the TFT substrate 914.

Although not shown, a gate and a data driver for generating a driving signal for driving the panel 910 may be provided on the side of the display panel 910.

11 and 12 illustrate a display apparatus according to an embodiment.

Referring to FIG. 11, the display apparatus 1000 includes a display module 900, a front cover 1100 and a back cover 1200 surrounding the display module 900, and a driver 1300 provided in the back cover 1200. And a driving unit cover 1400 surrounding the driving unit 1300.

The front cover 1100 may include a front panel (not shown) of a transparent material that transmits light, and the front panel protects the display module 900 at regular intervals, and the light emitted from the display module 900. Through the transmission, the image displayed on the display module 900 is viewed from the outside.

The back cover 1200 may be combined with the front cover 1100 to protect the display module 900.

The driving unit 1300 may be disposed on one surface of the back cover 1200.

The driving unit 1300 may include a driving control unit 1300a, a main board 1300b, and a power supply unit 1300c.

The driving controller 1300a may be a timing controller, and the driving controller 1300 controls the operation timing of each driver IC of the display module 900. The main board 1300b is a driver that transmits V sink, H sink, and R, G, and B resolution signals to the timing controller. The power supply unit 1300c is a driving unit for applying power to the display module 900.

The driver 1300 may be provided in the back cover 1200 and may be wrapped by the driver cover 1400.

The back cover 1200 may be provided with a plurality of holes to connect the display module 900 and the driver 1300, and a stand 1500 to support the display apparatus 1000.

On the other hand, as shown in FIG. 12, the driving control unit 1300a of the driving unit 1300 may be provided in the back cover 1200, and the main board 1300b and the power supply unit 1300c may be provided in the stand 1500. have.

In addition, the driver cover 1400 may cover only the driving controller 1300a provided in the back cover 1200.

In the exemplary embodiment, the main board 1300b and the power supply unit 1300c are separately configured, but may be formed as one integrated board, but is not limited thereto.

Yet another embodiment may be implemented as a backlight unit, for example, a display device, an indicator device, and an illumination system including the light source module, the first and second reflectors 400, 500, and 600 described in the above-described embodiments. For example, the lighting system may include a lamp, a street lamp.

Such a lighting system can be used as a lighting lamp that focuses a plurality of LEDs to obtain light, and in particular, can be used as a recessed light (down light) that is embedded in a ceiling or a wall of a building so that the opening side of the shade can be exposed to 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, 400: light source module 20, 500: first reflecting portion
30, 600: second reflecting portion 40, 700: optical member
50, 200: cover plate 60, 100: bottom cover
110: fastening protrusion 112: pillar
114: top plate 120: support portion
130A, 130B, 132A, 132B, 134A, 134B: Stopper
140: second groove 210: fastening hole
220: first groove 230: optical member fixing portion
900: display module 912, 914: substrate
916: upper polarizer 918: lower polarizer
920: backlight unit 1100: front cover
1200: back cover 1300: drive unit
1400: drive part cover 1500: stand

Claims (14)

First and second reflectors;
At least one light source module disposed between the first reflecting unit and the second reflecting unit;
A cover plate supporting the first reflection part and having at least one fastening hole in a sidewall thereof; And
A bottom cover supporting the second reflection part and having a fastening protrusion protruding to be inserted into the fastening hole;
The fastening protrusion is inserted into the fastening hole so that the cover plate is mounted on the bottom cover. The method of claim 1, wherein the fastening protrusion
A pillar protruding in a first direction from a side wall of the bottom cover; And
And a top plate extending from the pillar in a second direction different from the first direction. The backlight unit of claim 2, wherein the top plate is any one of an oval, a circular, a semicircular, and a polygon. The method of claim 2, wherein the fastening hole
A first area having a size and shape into which the top plate is insertable;
A second region having a size suitable for fixing the pillar; And
And a third area forming a path in which the fastening protrusion slides from the first area to the second area. The bottom cover of claim 2 or 4, wherein
And at least one support part protruding in the first direction to receive the cover plate. The method of claim 5, wherein the cover plate
And a first groove suitable for fitting the support portion in the second direction. The backlight unit of claim 6, wherein the first groove has an elliptical, circular, semicircular or polygonal shape. The backlight unit of claim 6, wherein the outermost protruding surface of the support portion is flush with the outer surface of the side wall of the cover plate when the support portion is fitted into the first groove. The method of claim 2, wherein the bottom cover
And at least one stopper protruding in at least one of the distal end portions of the sidewalls of the bottom cover in a direction that prevents transverse movement of the cover plate. The backlight unit of claim 9, wherein the stopper protrudes from at least one of an upper surface and a side surface of the tip portion of the side wall of the bottom cover. The method of claim 2, wherein the bottom cover
And a second groove in which the light source module can be inserted into at least one of the front end portions of the side walls. The backlight unit of claim 11, wherein the second groove is formed at an edge of the tip portion. Display panel;
It includes a backlight unit for irradiating light to the display panel,
Display device using the backlight unit is any one of the backlight unit of claim 1 to claim 12, wherein the backlight unit. An illumination system comprising the backlight unit according to any one of claims 1 to 12.

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