KR101850436B1 - display device and illumination system using the same - Google Patents

Abstract

A backlight unit and an illumination system including a bottom cover, a reflector disposed on the bottom cover, an optical member spaced apart from the reflector by a predetermined distance, a reflector, And a bracket for supporting the light source module, wherein the bracket has a first region adjacent to the optical member, a third region adjacent to the bottom cover, and a second region adjacent to the first and third A first protrusion protruding from a first region of the body portion and contacting the optical member, and a second protrusion protruding from a second region of the body portion, the reflector protruding from the first region of the body portion, And a third protrusion protruding from the third region of the body portion and contacting the bottom cover.

Description

DISPLAY DEVICE AND ITS ILLUMINATION SYSTEM USING THE SAME

An embodiment relates to a backlight unit and a lighting system.

Typically, typical large-sized display devices include a liquid crystal display (LCD), a plasma display panel (PDP), and the like.

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 or upper and lower sides of the LCD panel, Since the light is uniformly distributed over the surface, uniformity of light is good and the thickness of the panel can be made very thin.

The direct-type method is generally used for a display of 20 inches or more, and since the light source is arranged at a lower portion of the panel, the light efficiency is higher than that of the edge method. Thus, it is mainly used for a large display requiring high brightness.

CCFL (Cold Cathode Fluorescent Lamp) is used as a light source of the backlight unit of the conventional edge method or direct-down type.

However, since the backlight unit using CCFL is always supplied with power to the CCFL, a considerable amount of power is consumed, and a color reproduction ratio of about 70% as compared with CRT and environmental pollution problems caused by the addition of mercury are pointed out as disadvantages.

BACKGROUND ART [0002] As a substitute product for solving the above problem, researches on a backlight unit using an LED (Light Emitting Diode) have been actively conducted.

When the LED is used as a backlight unit, it is possible to partially turn on / off the LED array, thereby drastically reducing the power consumption. In the case of the RGB LED, the color reproduction range specification exceeding 100% of the National Television System Committee (NTSC) So that a more vivid image quality can be provided to the consumer.

1 is a sectional view showing a general backlight unit.

1, the backlight unit includes a light guide plate 2, a reflector 3, an optical member 4, a light source module 5, .

The backlight unit may further include a top cover 6, a bottom cover 7, and a panel guide module 8.

The panel guide module 8 can support the display panel 9 and the top cover 6 can be connected to the panel guide module 8 and the bottom cover 7.

Next, the light guide plate 2 has a reflector 3 disposed on a lower surface thereof, and an optical member 4 disposed on an upper surface thereof.

Next, the light source module 5 includes a substrate 5b and a light source 5a arranged on the substrate 5b. The light source module 5 may be disposed on both sides of the light guide plate 2.

The backlight unit having such a structure can uniformly diffuse the light using the light guide plate 2, but the whole backlight unit is not only heavy because of the light guide plate 2, but also causes a rise in price.

Therefore, it will be necessary to develop a backlight unit capable of uniformly diffusing light even without the light guide plate 2 in the future.

An embodiment of the present invention is to provide a backlight unit having an air guide and a lighting system using the same, by using a reflector having some inclined surfaces without a light guide plate.

An embodiment includes a bottom cover, a reflector disposed over the bottom cover, an optical member disposed spaced apart from the reflector at regular intervals, at least one optical member disposed between the reflector and the optical member, And a bracket for supporting the light source module. The bracket includes a first region adjacent to the optical member, a third region adjacent to the bottom cover, and a second region located between the first and third regions. A first projection projecting from a first region of the body portion and contacting the optical member, a second projection projecting from a second region of the body portion and contacting the reflector, And a third protrusion protruding from the third region of the body portion and contacting the bottom cover.

Here, the first, second, and third protrusions are parallel to each other, and the first, second, and third protrusions may protrude in a direction perpendicular to the body portion.

Then, the first, second, and third projections project in directions parallel to the optical member, and the body portion can be disposed in a direction perpendicular to the optical member.

The first projection may protrude from the body portion to a first height, and the second projection may protrude from the body portion to a second height, wherein the first height may be higher than the second height.

Here, the first height may be 1.1 - 5 times the second height.

Next, the first protrusion protrudes from the body portion to a first height, and the third protrusion protrudes from the body portion to a third height, wherein the first height may be lower than the third height.

Here, the first height may be 0.1 - 0.9 times the third height.

The body portion may include a first surface contacting the light source module and a second surface facing the first surface, and first, second, and third protrusions may protrude from the first surface of the body portion.

The first projecting portion may include a third surface facing the light source module and a fourth surface facing the third surface, and the first fastening portion may be formed on the fourth surface of the first projecting portion.

Here, the first fastening portion may be at least one projection projecting in a direction parallel to the body portion.

Next, the third surface of the first projection includes a flat surface and an inclined plane, the plane is adjacent to the light source module, and the inclined surface extends from the end of the plane and can be tilted toward the reflector.

Here, the end of the inclined surface may be located in the same collinear shape as the light source module.

Then, the third surface of the first projection includes a plane, first and second inclined surfaces, the plane is adjacent to the light source module, the first inclined surface extends from the end of the plane and is inclined in the reflector direction, And may be inclined from the end of the first inclined surface toward the optical member.

Here, the first angle between the extension of the plane and the first inclined plane may be smaller than the second angle between the extended line of the plane and the second inclined plane.

At this time, a contact point at which the first inclined surface and the second inclined surface meet may be collinear with the light source of the light source module.

The third projection may include a fifth surface facing the second projection and a sixth surface facing the fifth surface, and a second coupling portion may be formed on the sixth surface of the third projection.

Here, at least one of the second fastening portions is disposed in the edge region of the third projecting portion, and the second fastening portion can be inserted into the fastening groove of the bottom cover.

Then, the third protrusion may be disposed at a certain distance from the reflector.

Next, the light source module may be positioned between the first and second protrusions, wherein the light source module may be in contact with the first and second protrusions, or the light source module may be disposed at a first distance from the first protrusion, And may be disposed at a second interval from the projection.

The reflector includes a first contact area contacting the second projection and a second contact area contacting the bottom cover, and a non-contact area may be located between the first contact area and the second contact area.

Here, the first contact region may be a plane, the second contact region may be an inclined plane, and the non-contact region may be at least one of a plane and an inclined plane.

The first contact region may be a regular reflection surface, the second contact region may be a diffusely reflective surface, and the non-contact region may be at least one of a regular reflection surface and a diffusely reflective surface.

The area of the non-contact area may be larger than the area of the first contact area, and the area of the non-contact area may be smaller than the area of the second contact area.

The embodiment may further include a panel guide module coupled to the first protrusion of the bracket to support the display panel, and a top cover coupled to the bottom cover.

Embodiments can provide a light weight, a low manufacturing cost, and a uniform luminance by forming a reflector for an air guide having a certain inclined surface without using a light guide plate.

Therefore, the economical and reliability of the backlight unit can be improved.

1 is a cross-sectional view showing a typical backlight unit
2 is a cross-sectional view illustrating a backlight unit according to an embodiment
3 is a cross-sectional view showing the bracket of FIG. 2 in detail;
Figs. 4A to 4C are cross-sectional views comparing the heights of the first, second, and third protrusions of the bracket
5A and 5B are cross-sectional views comparing the thicknesses of the first, second, and third protrusions of the bracket
Figs. 6A and 6B are cross-sectional views comparing the intervals between the first, second and third projections of the bracket
7 is a cross-sectional view showing the fastening member of the first projection of the bracket
8 is a cross-sectional view showing the fastening of the first projection of the bracket and the panel guide module
9 and 10 are cross-sectional views showing another embodiment of the first projection of the bracket
11 is a cross-sectional view showing the fastening member of the third projection of the bracket
12 is a cross-sectional view showing the fastening of the third projection and the bottom cover of the bracket
13 is a sectional view for explaining the positional relationship between the third projection of the bracket and the reflector
FIGS. 14A to 14D are cross-sectional views for explaining the arrangement relationship between the first and second projections of the light source module and the bracket;
15 is a cross-sectional view showing the contact surface of the reflector and the area of the non-
16 is a view showing a backlight unit in which an optical member is disposed
17 is a view showing a display module having a backlight unit according to the embodiment
18 and 19 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 the embodiments, it is to be understood that each layer (film), region, pattern or structure is formed "on" or "under" a substrate, each layer The terms " on "and " under " encompass both being formed" directly "or" indirectly " In addition, the criteria for above or below each layer will be described with reference to the drawings.

The thickness and size of each layer in the drawings are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Also, the size of each component does not entirely reflect the actual size.

2 is a cross-sectional view illustrating a backlight unit according to an embodiment.

2, the backlight unit includes a light source module 100, a bracket 200, a reflector 300, a top cover 400, a bottom cover (not shown) 500, an optical member 600, and a panel guide module 700.

Here, the bracket 200 can support the light source module 100.

Further, the bracket 200 may support the reflector 300 and the optical member 600.

That is, the bracket 200 may include a body portion, first, second, and third projecting portions, the body portion supporting the light source module 100, the first projecting portion supporting the optical member 600, 2 protrusion can support the reflector 300, and the third protrusion can be fastened to the bottom cover 500. [

The first protrusion of the bracket 200 may be formed of one of a reflective coating film and a reflective coating material layer to reflect light generated from the light source module 100 toward the reflector 300.

Here, the lower surface of the first protrusion may include a first area facing the reflector 300 and being a first flat surface and a second area being a first inclined plane.

The first plane may be adjacent to the light source module 100, and the first inclined plane may extend from the end of the first plane and be inclined toward the reflector 300.

Here, the end of the first inclined surface may be collinear with the light source module 100.

The lower surface of the first protrusion of the bracket 200 may further include a third area that is a second inclined surface.

Here, the second inclined surface may extend from the first inclined surface end of the second region and be inclined toward the upper surface of the first protruded portion.

However, the third region having the third inclined plane may be omitted in some cases.

The reason for forming the first inclined surface on the first projecting portion of the bracket 200 is to prevent hot spots from being generated due to the light concentrated around the end of the first projecting portion.

In addition, the second inclined surface is further formed on the first projecting portion in order to prevent the luminance of the periphery of the first reflector 200 from deteriorating due to the light interception of the first inclined surface.

The first protrusion of the bracket 200 may include a metal or metal oxide having a high reflectivity such as aluminum (Al), silver (Ag), gold (Au), titanium dioxide (TiO ₂ )

In some cases, the first protrusion of the bracket 200 may be formed by depositing or coating a metal or a metal oxide on the polymer resin frame, or may be formed by printing metal ink.

The first protrusion of the bracket 200 may be formed by adhering a reflective film or a reflective sheet on the polymer resin frame.

The first protrusion of the bracket 200 may be formed with a serrated reflection pattern on a part of the lower surface.

Here, the surface of the reflection pattern may be plane or curved.

The light source module 100 may be positioned between the first protrusion and the second protrusion of the bracket 200.

In some cases, the light source module 100 may be disposed at a predetermined distance from the second protrusion while contacting the first protrusion, or may be disposed apart from the first protrusion at the same time as contacting the second protrusion.

Alternatively, the light source module 100 may be spaced apart from the first projection and the second projection, or may be simultaneously contacted with the first projection and the second projection.

The light source module 100 may include a substrate 100b having an electrode pattern and at least one light source 100a disposed on the substrate 100b.

Here, the light source 100a of the light source module 100 may be a top view type light emitting diode.

In some cases, the light source 100a may be a side view type light emitting diode.

The substrate 100b may be a PCB (Printed Circuit Board) substrate made of any one material selected from the group consisting of polyethylene terephthalate (PET), glass, polycarbonate (PC) and silicon (Si) have.

In addition, the substrate 100b may be a single layer PCB, a multilayer PCB, a ceramic substrate, a metal-core PCB, or the like.

Here, the substrate 100b may be formed of a reflective coating film and a layer of a reflective coating material, and may reflect the light generated by the light source 100a to the central region of the reflector 300. [

The light source 100a may be a light emitting diode (LED) chip. The light emitting diode chip may be a blue LED chip or an ultraviolet LED chip, or may be a red LED chip, a green LED chip, a blue LED chip, ) LED chip, or a white LED chip.

The white LED may be realized by combining a yellow phosphor on a blue LED or by simultaneously using a red phosphor and a green phosphor on a blue LED, (Yellow phosphor), Red phosphor (Phosphor) and Green phosphor (Phosphor).

Next, the reflector 300 may have a partially inclined plane and may be formed of a metal having a high reflectance such as aluminum (Al), silver (Ag), gold (Au), titanium dioxide (TiO ₂ ) As shown in FIG.

The inclined surface of the reflector 300 may be inclined at an angle with respect to the surface of the first projection of the bracket 200 and the inclined surface may be a concave surface, a convex surface, a flat surface, ). ≪ / RTI >

Optionally, the reflector 300 may include at least one inclined plane and at least one flat surface, wherein the plane of the reflector 300 is parallel to the plane of the first projection of the bracket 200, It can be a parallel side.

Further, the reflector 300 includes at least two inclined surfaces having at least one inflection point, and curvatures of the first and second inclined surfaces adjacent to each other around the inflection point may be different from each other.

For example, the upper surface of the reflector 300 may include a fourth region, which is a flat surface, and a fifth region, which is a third inclined plane.

Here, the second plane may be in contact with the second projection of the bracket 200, and the third inclined plane may extend from the end of the second plane to be inclined toward the lower surface of the reflector 300.

Next, the optical member 600 may be disposed spaced apart from the reflector 300 at regular intervals.

An air guide may be formed in a space between the reflector 300 and the optical member 600.

Optionally, the optical member 600 is made 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, and the prism sheet guides the diffused light to the light emitting area, and the brightness diffusion sheet strengthens the brightness.

The panel guide module 700 is coupled to the first protrusion of the bracket 200 to support the display panel 800.

The top cover 400 includes a fastening protrusion 410 and the fastening protrusion 410 of the top cover 400 can be fastened to the fastening groove 510 of the bottom cover 500.

3 is a cross-sectional view showing the bracket of FIG. 2 in detail.

3, the bracket 200 may include a body portion 210, a first protrusion 220, a second protrusion 230, and a third protrusion 240. As shown in FIG.

Here, the body 210 may be in contact with the light source module 100.

That is, the body 210 may include a first surface 210a contacting the light source module 100 and a second surface 210b facing the first surface 210a. The first, second, and third protrusions 220, 230, and 240 may protrude from the first surface 210a.

For example, the body 210 includes a first region adjacent to the optical member 600, a third region adjacent to the bottom cover 500, and a second region positioned between the first and third regions The first protrusion 220 protrudes from the first area of the body 210 and contacts the optical member 600 while the second protrusion 230 protrudes from the second area of the body 210 The third protrusion 240 protrudes from the third area of the body 210 and can be contacted to the bottom cover 500.

Here, the first, second, and third protrusions 220, 230, and 240 may be parallel to each other.

The first, second, and third protrusions 220, 230, and 240 may protrude in a direction perpendicular to the body 210.

The first, second, and third protrusions 220, 230, and 240 protrude in a direction parallel to the optical member 600, and the body 210 protrudes in a direction perpendicular to the optical member 600 .

The first protrusion 220 protrudes from the body 210 at a first height h1 and the second protrusion 230 protrudes from the body 210 at a second height h2. 2 < / RTI > height h2.

Here, the first height h1 may be 1.1 to 5 times the second height h2.

The height of the first protrusion 220 is higher than the height of the second protrusion 230 because the first protrusion 220 needs a larger area than the second protrusion 230.

That is, the second protrusion 230 needs only the area for supporting the reflector 300, but the first protrusion 220 has not only an area for supporting the optical member 600 but also a fastening member for fastening the panel guide module This is because an area to be disposed is also required.

The first protrusion 220 protrudes from the body 210 to a first height h1 and the third protrusion 240 protrudes from the body 210 to a third height h3. 3 < / RTI > height h3.

Here, the first height h1 may be 0.1 - 0.9 times the third height h3.

The reason why the height of the third protrusion 240 is higher than the height of the first protrusion 220 is that the bracket 200 is stably fastened to the bottom cover 500 of FIG.

That is, the third protrusion 240 needs a large area where a plurality of fastening members are to be formed to stably fasten the bottom cover 500 (FIG. 2).

The first protrusion 220 includes a third surface 220a facing the light source module 100 and a fourth surface 220b facing the third surface 220a. The first fastening part 222 may be formed on the fourth surface 220b.

Here, the first fastening part 222 may be at least one protrusion protruding in a direction parallel to the body part 210.

The third protrusion 240 includes a fifth surface 240a facing the second protrusion 230 and a sixth surface 240b facing the fifth surface 240a. The second fastening portion 242 may be formed on the sixth surface 240b of the second fastening portion 240. [

Here, at least one of the second fastening portions 242 is disposed in the edge region of the third projecting portion 240 and can be inserted into the fastening groove of the bottom cover 500 (FIG. 2).

At this time, the second fastening portion 242 may be a brace of a regulator type.

The third protrusions 240 may be spaced apart from the reflector 300 by a predetermined distance.

4A to 4C are cross-sectional views comparing the heights of the first, second, and third projections of the bracket.

4A to 4C, the first protrusion 220 protrudes from the body 210 to a first height h1 and the second protrusion 230 protrudes from the body 210 to a second height h2 And the third protrusion 240 protrudes from the body 210 to a third height h3.

The height h3 of the third protrusion 240 corresponds to the height of the first and second protrusions 220 and 230. The height h3 of the third protrusion 240 is the height of the first protrusion 220, And the height h2 of the second protrusion 230 is lower than the heights h1 and h3 of the first and third protrusions 220 and 240. The height h1 of the first protrusion 220 is higher than the height h1 of the first protrusion 220, 2 protrusion 230 and may be lower than the height h3 of the third protrusion 240. [

The first height h1 may be 1.1 to 5 times the second height h2. The reason why the height h1 of the first protrusion 220 is higher than the height h2 of the second protrusion 230 is that the first protrusion 220 This is because a larger area is required as compared with the second protrusion 230.

That is, the second protrusion 230 needs only the area for supporting the reflector 300, but the first protrusion 220 has not only an area for supporting the optical member 600 but also a fastening member for fastening the panel guide module This is because an area to be disposed is also required.

The height h1 of the third protrusion 240 is higher than the height h1 of the first protrusion 220 because the first height h1 may be 0.1-0.9 times the third height h3. And to fasten to the bottom cover (500 in Fig. 2).

That is, the third protrusion 240 needs a large area where a plurality of fastening members are to be formed to stably fasten the bottom cover 500 (FIG. 2).

4B shows an embodiment in which the height h3 of the third protrusion 240 is different from the heights h1 and h2 of the first and second protrusions 220 and 230. The height h3 of the third protrusion 240 is a distance between the first and second protrusions 220 and 230, The height h2 of the second protrusion 230 and the height h1 of the first protrusion 220 may be the same as the height h1 and h2 of the second protrusions 220 and 230.

4C shows an example in which the heights of the first, second and third protrusions 220, 230 and 240 are equal to each other. The height h3 of the third protrusion 240, the height h2 of the second protrusion 230, The height h1 of the first protrusions 220 may be equal to each other.

As described above, the height of the first, second, and third protrusions 220, 230, and 240 of the bracket 200 can be variously changed according to the manufacturing environment.

5A and 5B are cross-sectional views comparing the thicknesses of the first, second, and third protrusions of the bracket.

5A, the thickness t3 of the third protrusion 240, the thickness t2 of the second protrusion 230, and the thickness t1 of the first protrusion 220 may be equal to each other.

The thickness of the bracket body 210 may be equal to the thickness t3 of the third protrusion 240, the thickness t2 of the second protrusion 230 and the thickness t1 of the first protrusion 220. [

The thickness of the bracket body 210 is greater than at least one of the thickness t3 of the third protrusion 240, the thickness t2 of the second protrusion 230, and the thickness t1 of the first protrusion 220, .

The reason for this is that the body 210 must secure one side of the first, second, and third protrusions 220, 230, 240, so that a certain thickness must be secured.

5B, the thickness t2 of the second protrusion 230 may be thinner than the thickness t3 of the third protrusion 240 and the thickness t2 of the second protrusion 230. As shown in Fig.

Here, the ratio of the thickness t2 of the second protrusion 230 to the thickness t3 of the third protrusion 240 may be 0.3-0.9: 1.

The ratio of the thickness t2 of the second protrusion 230 to the thickness t1 of the first protrusion 220 may be 0.3-0.9: 1.

The reason for this is that, in the case of the second projection 230, only the force for supporting the reflector 300 is required. However, in the case of the first projection 220, since the optical member 600 and the coupling member I need strength.

Further, the third projection 240 needs a force capable of supporting a plurality of fastening members to stably fasten to the bottom cover (500 in Fig. 2).

The thickness of the bracket body 210 may be the same as the thickness t3 of the third protrusion 240 and the thickness t1 of the first protrusion 220. [

The thickness of the body portion 210 of the bracket may be thicker than at least one of the thickness t3 of the third protrusion 240 and the thickness t1 of the first protrusion 220. [

6A and 6B are cross-sectional views comparing the intervals between the first, second and third projections of the bracket.

The first, second, and third protrusions 220, 230, and 240 protrude from the body 210 and include a first protrusion 220 and a second protrusion 230, as shown in FIGS. 6A and 6B. The second protrusion 230 and the third protrusion 240 may be disposed apart from each other by a second distance d2.

Here, the first spacing d1 and the second spacing d2 may be equal to each other as shown in FIG. 6A, and may be different from each other as shown in FIG. 6B in some cases.

For example, the first spacing d1 between the first protrusion 220 and the second protrusion 230 may be less than the second spacing d2 between the second protrusion 230 and the third protrusion 240.

As described above, the interval between the first, second, and third protrusions 220, 230, and 240 of the bracket 200 can be variously implemented according to the manufacturing environment.

A second gap d2 between the second projection 230 and the third projection 240 is larger than a distance between the first projection 220 and the second projection 220. [ May be greater than the first spacing d1 between the second protrusions 230.

7 is a cross-sectional view showing the fastening member of the first projection of the bracket;

7, the first protrusion 220 includes a third surface 220a facing the light source module 100 and a fourth surface 220b facing the third surface 220a, The first coupling part 222 may be formed on the fourth surface 220b of the first protrusion 220. [

Here, the first fastening part 222 may be at least one protrusion protruding in a direction parallel to the body part 210.

At this time, the projections adjacent to each other may have the same height, but they may have different heights in some cases.

8 is a sectional view showing the fastening of the first protrusion of the bracket and the panel guide module.

8, the first fastening portion 222 of the first protrusion 220 can be fastened to the panel guide module 700 by the fastening screw 710. As shown in FIG.

At least one fastening hole may be formed in the panel guide module 700. A fastening screw 710 is inserted into the fastening hole formed in the panel guide module 700 and the fastening screw 710 inserted into the fastening hole And may be connected to the first fastening part 222 formed on the first protrusion 220.

9 and 10 are sectional views showing another embodiment of the first protrusion of the bracket.

First, as shown in FIG. 9, the first protrusion 220 of the bracket may include a first area and a second area, the lower surface facing the reflector 300 (FIG. 2).

The first region of the first protrusion 220 may be located adjacent to the light source module 100 and the second region of the first protrusion 220 may be located away from the light source module 100.

The first area of the first protrusion 220 is a first plane 225 parallel to the top surface of the first protrusion 220 and the second area of the first protrusion 220 is a first plane 225, The first inclined surface 226 may extend from the end of the reflector (inclined toward the reflector 300 in FIG. 2).

The lower surface of the first protrusion 220 includes a first region having a first width and a second region having a second width, wherein the first and second widths may be different from each other.

For example, the second width of the second region may be greater than the first width of the first region.

As such, the area of the first inclined surface 226 may be larger than the area of the first plane 225. [

The contact point P at which the first inclined surface 226 and the side surface of the first protrusion 220 meet may be located in the same collinear shape as the light source 100a of the light source module 100. [

For example, the contact P may be located between the width W of the light source 100a.

Next, in another embodiment, as shown in Fig. 10, the first projecting portion 220 of the bracket includes the first, second, and third regions of the lower surface facing the reflector (300 in Fig. 2) .

The first area of the first protrusion 220 is located adjacent to the light source module 100 and the third area of the first protrusion 220 is located away from the light source module 100, 2 region may be located between the first region and the third region.

The first area of the first protrusion 220 is a first plane 225 parallel to the top surface of the first protrusion 220 and the second area of the first protrusion 220 is a first plane 225, And a third region of the first protrusion 220 extends from the end of the first slope 226 and extends from the upper end of the first protrusion 220 to the upper end of the first protrusion 220. [ And a second inclined surface 227 inclined in the plane direction.

At this time, the inclination angle of the first inclined surface 226 and the inclined surface 227 may be different from each other.

For example, the inclination of the first inclined surface 226 may be smaller than the inclination of the second inclined surface 227.

That is, the first angle? 1 between the extension line of the first plane 225 and the first slope 226 is greater than the second angle? 2 between the extension of the first plane 225 and the second slope 227 Can be smaller.

However, depending on the case, the inclination of the first inclined plane 226 and the inclination of the second inclined plane 227 may be equal to each other.

The contact point P at which the first inclined surface 226 and the second inclined surface 227 meet may be collinear with the light source 100a of the light source module 100. [

For example, the contact P may be located between the width W of the light source 100a.

The first protrusion 220 has a first end adjacent to the light source module 100 and a second end opposite to the first end. The thicknesses of the first end and the second end may be different from each other.

Here, the thickness of the first end adjacent to the light source module 100 may be thinner than the thickness of the second end.

For example, the first thickness between the upper surface of the first protrusion 220 and the first surface 225 of the lower surface of the first protrusion 220 may be greater than the upper surface of the first protrusion 220, 220 may be thinner than the second thickness between the end of the first sloping surface 226 of the lower surface.

Here, the first thickness may be 0.1 - 0.9 times the second thickness.

The reason is that light is concentrated in the area around the second end of the first protrusion 220 to prevent hot spots from being generated.

In addition, the lower surface of the first protrusion 220 includes a first region having a first width, a second region having a second width, and a third region having a third width, wherein the first, second, The widths may be different.

For example, the second width of the second region may be greater than at least one of the first width of the first region and the third width of the third region.

Optionally, the second width of the second region may be equal to the third width of the third region.

The third width of the third region may be smaller than the first width of the first region.

Optionally, the third width of the third region may be greater than the first width of the first region.

As described above, the area of the first inclined plane 226 may be larger than the area of at least one of the first plane 225 and the second inclined plane 227.

The area of the second inclined plane 227 may be smaller than the area of at least one of the first plane 225 and the first inclined plane 226.

The first inclined surface 226 of the first protrusion 220 may be a flat surface having a predetermined inclination angle, a concave surface having a predetermined curvature, or a convex surface having a predetermined curvature .

The second inclined surface 227 of the first protrusion 220 may be a flat surface having a predetermined inclination angle, a concave curved surface having a predetermined curvature, or a convex curved surface having a predetermined curvature.

In some cases, the second inclined surface 227 of the first protrusion 220 may be a mixed shape in which at least any two of a concave curved surface, a convex curved surface, and a flat plane are mixed.

11 is a cross-sectional view showing the fastening member of the third projection of the bracket;

11, the third protrusion 240 includes a fifth surface 240a facing the second protrusion 230 and a sixth surface 240b facing the fifth surface 240a, The second fastening portion 242 may be formed on the sixth surface 240b of the third protrusion 240.

Here, at least one of the second fastening portions 242 is disposed in the edge region of the third projecting portion 240 and can be inserted into the fastening groove of the bottom cover 500 (FIG. 2).

At this time, the second fastening portion 242 may be a brace of a regulator type.

12 is a cross-sectional view showing the fastening of the third projection and the bottom cover of the bracket;

12, the second fastening portion 242 of the third protrusion 240 can be inserted into the fastening groove 501 of the bottom cover 500. As shown in FIG.

At least one coupling groove 501 may be formed in the bottom cover 500 and a second coupling portion 242 of the third projection 240 may be inserted into the coupling groove 501 formed in the bottom cover 500 And the inserted second fastening part 242 can connect the third protrusion 240 of the bracket and the bottom cover 500.

13 is a cross-sectional view for explaining the positional relationship between the third projection of the bracket and the reflector.

As shown in FIG. 13, the third protrusion 240 of the bracket may be spaced apart from the lower surface of the reflector 300 by a predetermined distance.

Here, the reflector 300 has one end thereof contacting the second protrusion 230 and extending in the direction of the bottom cover 500 (FIG. 2), but may extend so as not to contact the third protrusion 240.

For example, the reflector 300 may have a contact surface that is in contact with the second projection 230 and a non-contact surface that is not in contact with the second projection 230.

Here, the inclined surface of the reflector 300 may not contact the third projection 240.

The third spacing d3 between the central region of the third protrusion 240 and the reflector 300 may be greater than the fourth spacing d4 between the edge region of the third reflector 240 and the reflector 300. [

FIGS. 14A to 14D are cross-sectional views for explaining the arrangement relationship between the first and second projections of the light source module and the bracket;

14A is a view showing a light source module 100 which simultaneously contacts the first protrusion 220 and the second protrusion 230 and FIG. 14B is a view showing a state in which the first protrusion 220 and the second protrusion 230 are spaced apart from each other 14C is a view showing a light source module 100 which is in contact with the first protrusion 220 and is spaced apart from the second protrusion 230 at a predetermined distance. FIG. 14D is a view showing the light source module 100, The light source module 100 is spaced apart from the first protrusions 220 and is in contact with the second protrusions 230. FIG.

As shown in FIG. 14A, the light source module 100 may contact the first protrusion 220 and the second protrusion 230.

Here, the light source module 100 can prevent hot spot by contacting the first and second protrusions 220 and 230, and can transmit light to a region far from the light source module 100, .

14B, the light source module 100 may be spaced apart from the first protrusion 220 by a first distance d1 and from the second protrusion 230 by a second distance d2.

Here, the first distance d1 and the second distance d2 may be equal to each other, or may be different from each other.

As an example, the first distance d1 may be smaller than the second distance d2.

14C, the light source module 100 may be in contact with the first protrusion 220 and may be spaced apart from the second protrusion 230 by a distance d2.

Here, the light source module 100 can prevent hot spots by contacting the first protrusion 220, and can transmit light to a region far from the light source module 100.

Next, as shown in FIG. 14D, the light source module 100 may contact the second projection 230 and be spaced apart from the first projection 220 by a distance d1.

15 is a cross-sectional view showing an area of the contact surface of the reflector and the non-contact surface.

15, the reflector 300 includes a first contact area 305 to be in contact with the second projection 230 of the bracket and a second contact area 307 to be in contact with the bottom cover 500 can do.

The non-contact area 306 may be positioned between the first contact area 305 and the second contact area 307 of the reflector 300. [

Here, the first contact area 305 may be a plane, and the second contact area 307 may be an inclined surface.

The non-contact area 306 may be at least one of a flat surface and an inclined surface.

Further, the first contact area 305 may be a regular reflection surface, and the second contact area 307 may be a diffusely reflective surface.

The non-contact area 306 may be at least one of a regular reflection surface and a diffusely reflective surface.

The first contact area 305 of the reflector 300 may be provided with a regular reflection sheet that regularly reflects light and the noncontact area 306 and the second contact area 307 of the reflector 300 may reflect light At least one of a regularly reflecting regular reflection sheet and a diffusely reflecting sheet diffusely reflecting light may be formed.

The reason why the regular reflection sheet is formed in the first contact area 305 of the reflector 300 is that it can provide a uniform luminance by reflecting a large amount of light to the central area of the reflector 300 having low luminance.

The reason why the diffusing sheet is formed in the second contact area 307 of the reflector 300 is that the brightness can be compensated by irregularly reflecting the light in the second contact area 307 of the reflector 300 having low brightness to be.

Next, the area of the non-contact area 306 may be larger than the area of the first contact area 305. [

Further, the area of the non-contact area 306 may be larger than the area of the second contact area 307. [

When the second contact area 307 is an inclined surface, the upper surface 500a of the bottom cover 500 contacting the reflector 300 may be an inclined surface.

The reflector 300 may include a metal or metal oxide having a high reflectance such as aluminum (Al), silver (Au), gold (Au), titanium dioxide (TiO ₂ ) The first and second contact regions 305 and 307 and the noncontact region 306 may have different materials and the first and second contact regions 305 and 307 and the noncontact region 306 may have different surface roughnesses May be different from each other.

That is, in the reflector 300, the first and second contact regions 305 and 307 and the non-contact region 306 are formed of the same material, and the surface roughness may be different from each other.

Alternatively, in the reflector 300, the first and second contact regions 305 and 307 and the non-contact region 306 may be formed of different materials, and the surface roughness may be different from each other.

On the other hand, the reflector 300 may be a reflective coating film made in the form of a film or a layer of a reflective coating material on which a reflective material is deposited.

Reflector 300 may include at least one of metal or metal oxide, e.g., aluminum (Al), silver (Ag), gold metal having a high reflectance such as silver (Ag) or titanium dioxide (TiO ₂₎ Or a metal oxide.

In this case, the reflector 300 may be formed by depositing or coating a metal or metal oxide on a polymer resin frame, which is a bottom plate, or may be formed by printing metal ink.

Here, as the deposition method, a vacuum deposition method such as a thermal deposition method, an evaporation method, or a sputtering method can be used. As the coating or printing method, a printing method, a gravure coating method, or a silk screen method can be used.

Also, the reflector 300 may be formed in the form of a film or a sheet, and may be formed by adhering on the polymer resin frame.

Here, the reflector 300 may be a structure in which a single layer having the same reflectance is formed on the entire polymer resin frame as the bottom plate, and the reflector 300 may have a structure in which a plurality of layers having different reflectances are formed on the entire polymer resin frame Lt; / RTI >

The reason why the reflector 300 is formed with a plurality of layers having different reflectances is that if the reflective layer having the same reflectance is formed only, the light reflectance of the entire reflective surface is not uniform and the entire brightness of the backlight can be uneven to be.

Therefore, a reflective layer having a relatively high reflectance is formed in the reflective surface area where the brightness of light is low, or a reflective layer having a relatively low reflectance is formed in the reflective surface area where the brightness of light is high, so that the entire brightness of the backlight is uniformly corrected .

16 is a view showing a backlight unit in which an optical member is disposed.

As shown in Fig. 16, the optical member 600 may be disposed at a certain interval from the reflector 300 with a space therebetween.

An air guide may be formed in a space between the reflector 300 and the optical member 600.

Here, the optical member 600 may have a concave-convex pattern 620 on its upper surface.

The optical member 600 is for diffusing light emitted from the light source module 100 and may have a concave-convex pattern 620 formed on its upper surface to increase the diffusion effect.

That is, the optical member 600 may have a plurality of layers, and the concave-convex pattern 620 may have a top surface or a surface of any one layer.

The concavity and convexity pattern 620 may have a strip shape disposed along the light source module 100.

At this time, the concave-convex pattern 620 has a protrusion on the surface of the optical member 600, the protrusion is composed of a first surface and a second surface facing each other, and an angle between the first surface and the second surface is an obtuse angle or an acute angle .

Optionally, the optical member 600 is made 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, and the prism sheet guides the diffused light to the light emitting area, and the brightness diffusion sheet strengthens the brightness.

In addition, the reflector 300 may include at least one of metal or metal oxide, e.g., aluminum (Al), is a high reflectance such as silver (Ag), gold (Au) or titanium dioxide (TiO ₂₎ The branch may comprise a metal or a metal oxide.

In addition, the reflector 300 may be formed of any one of the reflective coating film and the reflective coating material layer, and may reflect the light generated from the light source module 100 toward the optical member 600.

The reflector 300 may be formed with a serrated reflection pattern on the surface facing the optical member 600, and the surface of the reflection pattern may be flat or curved.

The reason for forming the reflection pattern on the surface of the reflector 300 is that the light generated by the light source module 100 can be uniformly diffused and reflected.

Thus, by forming the reflector for the air guide having at least one of the planar surface and the curved surface, the embodiments can provide a light weight, low manufacturing cost, and uniform brightness.

Therefore, the economical and reliability of the backlight unit can be improved.

Also, the display device, the indicating device, and the illumination system including the bracket, the reflector, and the light source module described in the above embodiments can be implemented. For example, the illumination system can include a lamp and 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.

17 is a view showing a display module having a backlight unit according to an embodiment.

As shown in FIG. 17, the display module 20 may include a display panel 800 and a backlight unit 700.

The display panel 800 includes a color filter substrate 810 and a TFT (Thin Film Transistor) substrate 820 bonded to each other to maintain a uniform cell gap, A liquid crystal layer (not shown) may be interposed.

The upper polarizer 830 and the lower polarizer 840 may be disposed on the upper and lower sides of the display panel 800 and more specifically the upper polarizer 830 may be disposed on the upper surface of the color filter substrate 810 And the lower polarizer 840 may be disposed on the lower surface of the TFT substrate 820.

Although not shown, a gate and a data driver for generating a driving signal for driving the panel 800 may be provided on a side of the display panel 800.

18 and 19 are views showing a display device according to an embodiment.

18, the display device 1 includes a display module 20, a front cover 30 and a back cover 35 surrounding the display module 20, a driving unit 55 provided in the back cover 35, And a driving unit cover 40 surrounding the driving unit 55.

The front cover 30 may include a front panel (not shown) made of a transparent material transmitting light. The front panel may protect the display module 20 at regular intervals, and light emitted from the display module 20 So that an image displayed on the display module 20 is displayed from the outside.

The back cover 35 can be coupled with the front cover 30 to protect the display module 20.

A driving unit 55 may be disposed on one side of the back cover 35.

The driving unit 55 may include a driving control unit 55a, a main board 55b, and a power supply unit 55c.

The driving control unit 55a may be a timing controller and is a driving unit for adjusting the operation timing of each driver IC of the display module 20. The main board 55b may include a V-sync, an H- B resolution signal, and the power supply unit 55c is a driving unit for applying power to the display module 20. [

The driving part 55 may be provided on the back cover 35 and may be surrounded by the driving part cover 40.

The back cover 35 may include a plurality of holes to connect the display module 20 and the driving unit 55 and a stand 60 for supporting the display device 1.

19, the driving control unit 55a of the driving unit 55 is provided in the back cover 35, and the main board 55b and the power board 55c may be provided in the stand 60 have.

The driving unit cover 40 may cover only the driving unit 55 provided on the back cover 35.

Although the main board 55b and the power board 55c are separately formed in the present embodiment, they may be formed as one integrated board, but are not limited thereto.

Another embodiment may be implemented with a bracket, a reflector, a display device including a light source module, a pointing device, and a lighting system described in the above embodiments, 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.

The features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, It can be seen 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.

100: Light source module 200: Bracket
300: Reflector 210: Body part
220: first protrusion 230: second protrusion
240: third protrusion

Claims (30)

A bottom cover;
A reflector disposed on the bottom cover;
An optical member disposed at a predetermined interval from the reflector;
At least one light source module disposed between the reflector and the optical member; And,
And a bracket for supporting the light source module,
The bracket
A body portion including a first region adjacent to the optical member, a third region adjacent to the bottom cover, and a second region located between the first and third regions, the body region contacting the light source module;
A first projection projecting from a first region of the body portion and contacting the optical member;
A second protrusion protruding from a second region of the body portion and contacting the reflector;
And a third projection projecting from a third region of the body portion and contacting the bottom cover,
Wherein the first protrusion protrudes from the body portion to a first height and the second protrusion protrudes from the body portion to a second height, the first height is higher than the second height,
The third protrusion protruding from the body portion to a third height, the third protrusion being lower than the third height,
Wherein the first height is 1.1 - 5 times the second height, 0.1 - 0.9 times the third height,
Wherein the body portion includes a first surface contacting the light source module and a second surface facing the first surface, the first, second, and third protrusions protruding from a first surface of the body portion,
Wherein the first protrusion includes a third surface facing the light source module and a fourth surface facing the third surface, a first fastening portion is formed on a fourth surface of the first protrusion,
The first fastening portion is at least one projection projecting in a direction parallel to the body portion,
Wherein the third surface of the first protrusion includes a flat surface and an inclined plane, the plane is adjacent to the light source module, the inclined surface extends from an end of the plane and is inclined toward the reflector ,
The end of the inclined surface is positioned in the same collinear shape as the light source module,
Wherein the third surface of the first protrusion includes a plane, first and second sloped surfaces, the plane is adjacent to the light source module, the first sloped surface extends from an end of the plane and is inclined toward the reflector, The second inclined surface is inclined from the end of the first inclined surface toward the optical member,
The first angle between the extension of the plane and the first inclined surface is smaller than the second angle between the extension of the plane and the second inclined surface,
And a contact point at which the first inclined surface and the second inclined surface meet is located in the same collinear shape as the light source of the light source module. delete delete The display device according to claim 1, wherein the first, second, and third projections project in a direction parallel to the optical member, and the body portion is disposed in a direction perpendicular to the optical member. delete delete delete delete delete delete delete delete delete delete delete delete The apparatus of claim 1, wherein the third protrusion includes a fifth surface facing the second protrusion and a sixth surface facing the fifth surface, and a second fastening portion is formed on the sixth surface of the third protrusion And,
At least one of the second fastening portions is disposed in an edge region of the third projecting portion and is inserted into the fastening groove of the bottom cover,
And the third projection is disposed at a predetermined distance from the reflector. delete delete The light source module according to claim 1, wherein the light source module is located between the first and second projections,
Wherein the light source module is in contact with at least one of the first and second protrusions,
Wherein the light source module is disposed at a first distance from the first projection and at a second distance from the second projection,
Wherein the first interval is smaller than the second interval. delete delete delete A bottom cover;
A reflector disposed on the bottom cover;
An optical member disposed at a predetermined interval from the reflector;
At least one light source module disposed between the reflector and the optical member; And,
And a bracket for supporting the light source module,
The bracket
A body portion including a first region adjacent to the optical member, a third region adjacent to the bottom cover, and a second region located between the first and third regions, the body region contacting the light source module;
A first projection projecting from a first region of the body portion and contacting the optical member;
A second protrusion protruding from a second region of the body portion and contacting the reflector;
And a third projection projecting from a third region of the body portion and contacting the bottom cover,
Wherein the first protrusion protrudes from the body portion to a first height and the second protrusion protrudes from the body portion to a second height, the first height is higher than the second height,
The third protrusion protruding from the body portion to a third height, the third protrusion being lower than the third height,
Wherein the first height is 1.1 - 5 times the second height, 0.1 - 0.9 times the third height,
Wherein the reflector includes a first contact area contacting the second projection and a second contact area contacting the bottom cover, the non-contact area being located between the first contact area and the second contact area,
Wherein the first contact region includes a plane, the second contact region includes a slope, and the non-contact region includes at least one of the plane and the slope,
Wherein the first contact area is a regular reflection surface, the second contact area is a diffusive reflection surface, and the noncontact area is at least one of the regular reflection surface and the diffusive reflection surface,
The area of the non-contact area is larger than the area of the first contact area,
Wherein an area of the non-contact area is smaller than an area of the second contact area.
delete delete delete delete delete delete

Images