KR101818589B1 - Display device - Google Patents

Abstract

The present invention relates to a backlight unit having a local dimming structure capable of divided driving, which comprises an optical sheet, a reflecting unit having a reflecting surface inclined at a predetermined angle from a horizontal plane parallel to the surface of the optical sheet, A plurality of submodules arranged in at least one of a first direction of the horizontal plane and a second direction perpendicular to the first direction and a plurality of submodules arranged adjacent to each other And a connection unit for connecting the sub-modules.

Description

[0001]

The embodiment relates to a backlight unit of a local dimming structure capable of divided driving.

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 having a size of 20 inches or more. Since the light source is disposed at a lower portion of the panel, the light efficiency is higher than that of the edge type.

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 locally turn on / off the LED array, thereby dramatically reducing power consumption. In the case of the RGB LED, the LED is over 100% of the National Television System Committee (NTSC) So that a more vivid image quality can be provided to the consumer.

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

Currently, LCD products employing LEDs having the above advantages are being marketed extensively. However, since the conventional CCFL light source is different from the driving mechanism, driving drivers and PCB substrates are expensive.

Therefore, the LED backlight unit is only applied to expensive LCD products.

In an embodiment, a large backlight unit is constructed by combining a plurality of submodules including a light source and a reflecting unit having a reflecting surface inclined at a predetermined angle from a horizontal plane, so that a backlight unit of a local dimming structure .

An embodiment includes an optical sheet, a reflecting portion having a reflecting surface inclined at an angle from a horizontal plane parallel to the surface of the optical sheet, and a light source disposed at at least one side of the reflecting portion to transmit light to the reflecting surface of the reflecting portion, A plurality of submodules arranged in at least one of a first direction of the first submodule and a second direction perpendicular to the first direction, and a coupling unit connecting submodules adjacent to each other among the plurality of submodules.

Here, an air gap may be formed between the optical sheet and the reflective portion of the submodule.

The submodule includes a reflecting portion having a reflecting surface inclined at an angle from a horizontal plane parallel to the optical sheet surface, a fixing portion connected to one side of the reflecting portion and parallel to the optical sheet surface, And may further include a reflection mirror, which is connected to the fixing portion and reflects the light of the light source toward the reflection portion.

At least one of coupling grooves and coupling protrusions for coupling with the fixing portion may be formed on a part of the surface of the reflection mirror. In a part of the surface of the reflection mirror, coupling grooves for coupling with the reflection portion of the neighboring sub- At least one of the protrusions may be formed.

At least a part of the surface of the reflecting part may be formed with at least one of engaging grooves and engaging projections for engaging with neighboring submodules. At least part of the surface of the engaging part may be provided with at least one of engaging grooves and engaging projections One can be formed.

The submodule includes a reflecting portion having a reflecting surface inclined at a predetermined angle from a horizontal plane parallel to the surface of the optical sheet and a reflecting portion having first and second reflecting surfaces which are disposed to face each other at both ends of the reflecting surface of the reflecting portion, A light source disposed on at least one of a side surface of the first projecting portion and a reflective surface of the reflective portion adjacent to the first projecting portion and a semi-transmissive film disposed apart from the reflective surface to face the reflective surface of the reflective portion, .

Here, the semi-transmissive film is supported by the first projecting portion and the second projecting portion and has a surface parallel to the reflective surface of the reflective portion, and the semi-transmissive film is supported by the first projecting portion and may have a surface having a curvature with respect to the reflective surface of the reflective portion have.

An air gap may be provided between the semi-transmissive film and the reflective surface of the reflective portion.

The reflective portion may include a fixing portion protruding from a portion of the lower surface facing the reflective surface to support the reflective portion, wherein one side of the fixing portion may be in contact with a side surface of the adjacent submodule.

Further, the submodules arranged in the first direction of the horizontal plane may be arranged such that the light sources of neighboring submodules are arranged side by side on a straight line, or the light sources of neighboring submodules are shifted from each other.

The submodules arranged in the second direction of the horizontal plane may be arranged to cover the light sources of the neighboring submodules of the reflectors of the respective submodules and may be symmetrically arranged to face each other with respect to the adjacent submodules.

The coupling unit includes a first coupling member connecting the submodules arranged in the first direction of the horizontal plane and a second coupling member coupling the submodules arranged in the second direction of the horizontal plane, At least one of the members may be formed in the reflective portion of each sub-module.

In addition, each sub-module may include a support projection for supporting the optical sheet.

Embodiments can fabricate a backlight unit of a local dimming structure capable of divided driving by combining a plurality of submodules including a reflecting unit having a reflecting surface inclined at an angle from a horizontal plane to form a large backlight unit .

In addition, the embodiments are simple in overall construction, low in manufacturing cost of the backlight unit, light in overall weight, and can provide uniform brightness, so that the economics and reliability of the backlight unit can be improved.

1A and 1B are diagrams illustrating a backlight unit including a plurality of sub-modules according to an embodiment
2A to 2C are diagrams showing details of the sub-module of FIG. 1A
3A is a view showing a light source of a horizontal structure
3B is a view showing a light source of a vertical structure
3C is a view showing a light source of a hybrid type structure
Figs. 4 and 5 show another embodiment
6A and 6B are diagrams showing a backlight unit in which submodules having reflectors of FIG. 4 are arranged;
Figs. 7A to 7E are views showing another embodiment
FIGS. 8A to 8D are views showing the positional relationship between the reflection mirror and the light source
9 is a view showing a backlight unit including a plurality of sub-modules according to another embodiment
10A and 10B are views showing a backlight unit including a plurality of sub-modules according to another embodiment
11, 12A and 12B are diagrams showing a backlight unit having an optical sheet
13A to 13C are diagrams showing details of another embodiment of the submodule of FIG. 1A;
14 is a view showing the submodule of FIG. 13A with a semi-permeable membrane
15 is a view showing a semi-transparent film having a curvature
Figs. 16A and 16B are views showing a backlight unit including the submodules of Fig. 14
17, 18A and 18B are diagrams showing a backlight unit having an optical sheet
19A to 19E are views showing a backlight unit including a light transmitting supporter
20 is a view showing a display module having a backlight unit according to the present embodiment
21 and 22 are views showing a display device according to the present 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.

1A and 1B are views showing a backlight unit including a plurality of submodules according to an embodiment, wherein FIG. 1A is a plan view and FIG. 1B is a sectional view of FIG. 1A.

1A and 1B, the backlight unit may include a plurality of submodules 100 and a coupling unit 200 connecting the submodules 100. In some cases, the backlight unit may include a plurality of submodules 100, (Not shown) for uniformly controlling the brightness of light.

Here, the sub-module 100 includes a light source 102 and a reflector 104, and may further include a reflection mirror 106 as the case may be.

The submodule 100 may include a reflection mirror 106 on one side of the light source 102 and a reflection unit 104 on the other side of the light source 102 with the light source 102 as a center.

At this time, the reflecting portion 104 may have a reflecting surface inclined at an angle from a horizontal plane parallel to the optical sheet surface.

An air gap may be formed between the optical sheet positioned above the reflective portion 104 of the sub-module 100 and the reflective portion 104 of the sub-module 100.

Subsequently, each sub module 100 may be arranged in at least one of a first direction and a second direction perpendicular to the first direction, with respect to a horizontal plane parallel to the optical sheet surface.

In addition, each sub-module 100 may include a support projection for supporting the optical sheet.

Next, the coupling unit 200 connects adjacent submodules 100 among the plurality of submodules 100.

The coupling unit 200 includes a first coupling member 202 and a second coupling member 204 connecting the submodules arranged in the first direction of the horizontal plane and a second coupling member connecting the submodules arranged in the second direction of the horizontal plane 206).

At this time, at least one of the first and second coupling members 202, 204, and 206 may be formed in the reflection portion 104 of each sub-module 100.

FIG. 2A is a perspective view of the submodule, FIG. 2B is a cross-sectional view of FIG. 2A, and FIG. 2C is a plan view of FIG. 2A.

2A-2C, the sub-module 100 may include a light source 102 and a reflector 104, and may optionally include a reflective mirror 106 and a securing portion 108, .

Here, the light source 102 is disposed on at least one side of the reflection unit 104 and serves to advance the light to the reflection plane 110 of the reflection unit 104.

At least one light source 102 may be formed on the support layer 112.

The supporting layer 112 may be a substrate on which at least one light source 102 is mounted and may have an electrode pattern (not shown) for connecting an adapter (not shown) for supplying power to the light source 102 .

For example, a carbon nanotube electrode pattern (not shown) for connecting the light source 102 and an adapter (not shown) may be formed on the upper surface of the substrate.

The support layer 112 may be a printed circuit board (PCB) on which a plurality of light sources 102 are mounted, such as polyethylene terephthalate (PET), glass, polycarbonate (PC) . ≪ / RTI >

The light source 102 may be a light emitting diode (LED) chip, and the light emitting diode chip may be a blue LED chip or an ultraviolet LED chip or a red LED chip, a green LED chip, a blue LED chip, ) LED chip, or a white LED chip.

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

Here, the light source 102 may be classified into a horizontal type, a vertical type, and a hybrid type according to the structure.

FIG. 3A is a view showing a light source of a horizontal structure, FIG. 3B is a view illustrating a light source of a vertical structure, and FIG. 3C is a view illustrating a light source of a hybrid structure.

As shown in Fig. 3A, the light source of the horizontal structure has a substrate 9 made of silicon or sapphire at the lowermost part thereof.

The n-type semiconductor layer 2 may be located on the substrate 9, and the n-type semiconductor layer 2 may be formed of, for example, n-GaN.

Then, the active layer 3 may be positioned on the n-type semiconductor layer 2, and the active layer 3 may be repeatedly formed of, for example, InGaN (well layer) / GaN (barrier layer).

Next, the p-type semiconductor layer 4 may be located on the active layer 3, and the p-type semiconductor layer 4 may be made of, for example, p-GaN.

The p-type electrode 5 may be located on the p-type semiconductor layer 4 and the p-type electrode 5 may include at least one of chromium, nickel, and gold, for example.

The n-type electrode 6 may be disposed on the n-type semiconductor layer 2 and the n-type electrode 6 may include at least one of chromium, nickel, and gold.

3B, the light source of the vertical structure includes a p-type electrode 5 having a reflective surface 5a, a p-type semiconductor layer 4, an active layer 3, an n-type semiconductor layer 2, And an n-type electrode 6 are sequentially stacked.

When a voltage is applied to the p-type electrode 5 and the n-type electrode 6, such a light emitting element emits light having a height difference (energy gap) between the conduction band and the electromotive band, It can be operated on the principle of releasing energy.

3C, the n-type semiconductor layer 2, the active layer 3, and the p-type semiconductor layer 4 are formed on the substrate 9 in the light emitting device of the hybrid structure.

An n-type electrode 6 is formed on the n-type semiconductor layer 2 and a p-type electrode 5 is formed between the substrate 9 and the n-type semiconductor layer 2 to form the n- And the active layer 3 to be connected to the p-type semiconductor layer 4.

That is, the p-type electrode 5 is contacted to the p-type semiconductor layer 4 through the n-type semiconductor layer 2 and the hole formed to pass through the active layer 3.

Then, the insulating film 7 is coated on the side surface of the hole, so that the p-type electrode 5 is electrically insulated.

As a light source having such a structure, any one substrate selected from an Al 2 O 3 substrate, a semiconductor substrate, a conductive substrate having a light extracting structure, and the like can be used, and the substrate can be formed of GaN, AlN, AlGaN, InGaN / GaN SLS (Superlattices) A buffer layer may be formed of any selected material. A first N-type semiconductor layer may be formed on the buffer layer by using any one material selected from GaN, AlGaN, InGaN, InAlGaN, AlInN, Superlattices (SLS)

Here, the first N-type semiconductor layer is a semiconductor material having a composition formula of In _x Al _y Ga _{1- (x + y)} N (0? X? 1, 0? Y? 1, 0? _{X +} And an n-type dopant such as Si, Ge, or Sn may be doped.

On the first N-type semiconductor layer, a second N-type semiconductor layer is formed of any material selected from InGaN / GaN SLS, AlGaN / GaN SLS, InGaN / InGaN SLS, AlGaN / InGaN SLS (about 3-10 layers) And an active layer may be formed on the second N-type semiconductor layer using a material selected from InGaN / GaN or InGaN / InGaN well / barrier layers.

Here, the active layer may be formed of any one of a single quantum well structure, a multi quantum well structure, a quantum dot structure, or a quantum well structure.

On the active layer, a first P-type semiconductor layer may be formed of any one material selected from AlGaN, AlGaN / GaN SLS (about 30 nm or less), and the first P-type semiconductor layer may include GaN, AlGaN / GaN, Superlattices ) layer and the like can be used to form the second P-type semiconductor layer.

Here, a semiconductor material having a composition formula of In _x Al _y Ga _{1- (x + y)} N (0? X? 1, 0? Y? 1, 0? _{X + y?} 1) , A p-type dopant such as Ca, Sr, or Ba may be doped.

Next, the first electrode (n-electrode), the second electrode pad, and the second electrode (ohmic contact layer or transparent layer) are formed of indium tin oxide (ITO), indium zinc oxide (IZO) indium zinc oxide (IZO), indium gallium zinc oxide (IZO), indium gallium tin oxide (IGTO), aluminum zinc oxide (AZO), antimony tin oxide (ATO), gallium zinc oxide (GZO) , IrOx, RuOx, RuOx / ITO, Ni, Ag, Ni / IrOx / Au, or Ni / IrOx / Au / ITO.

As described above, the light source 102 of this embodiment can use various types of light emitting devices.

On the other hand, the reflecting portion 104 may have a reflecting surface 110 inclined at a predetermined angle from a horizontal plane parallel to the optical sheet surface.

Here, the reflective portion 104 may be a bottom cover plate of the backlight unit.

The reflective surface 110 of the reflective portion 104 reflects the light incident from the light source 102 to the upper optical sheet.

At this time, it is preferable that the reflective portion 104 be inclined at an angle of about 0-85 degrees with respect to the optical axis incident from the light source 102. [

Also, the reflective portion 104 may be formed of a conductive material having a high reflectivity of light, or may be formed of a nonconductive material, if necessary.

A reflective layer may be additionally formed on the reflective surface 110 of the reflective portion 104 to enhance the light reflection efficiency of the reflective portion 104. [

At this time, the reflective layer may be a reflective coating film formed in a film form, or may be a reflective coating material layer in which a reflective material is deposited.

The reflective layer may include at least one of a metal or a metal oxide and may be a metal or metal oxide having a high reflectance such as aluminum (Al), silver (Ag), gold (Ag), or titanium dioxide (TiO ₂ ) As shown in FIG.

In this case, the reflective layer may be formed by depositing or coating a metal or metal oxide on the reflective surface 110 of the reflective portion 104, or may be formed by printing metallic 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.

Alternatively, the reflective layer may be formed in the form of a film or a sheet and adhered onto the reflective surface 110 of the reflective portion 104.

In some cases, the reflective layer may have a predetermined reflection pattern on the surface thereof, or may form a reflection pattern of a predetermined shape on the reflective surface 110 itself of the reflective portion 104.

2A, the bottom cover plate may be formed to be inclined or the reflection sheet may be inclined. However, the reflector 104 may be formed in various shapes.

4 and 5 illustrate another embodiment of the reflector of FIG. 2A, wherein the reflector 104 is a semi-reflective mirror that is inclined at an angle of about 0-85 degrees with respect to the bottom surface, as shown in FIGS. And a reflector structure having a slope 110.

The cross section of the reflector structure has a right triangle shape, and the thickness of the reflector 104 may become thicker as the distance from the light source increases.

And, as shown in FIG. 5, the reflector structure of FIG. 4 may be supported by an outer cover 120 such as a bottom cover plate or the like.

6A and 6B are views showing a backlight unit in which submodules having reflectors of FIG. 4 are arranged. As shown in FIG. 6A, a reflector 104 having a reflector structure having a right- And the second direction perpendicular to the first direction, and the light sources 102 may be arranged side by side on one side of the reflecting portion 104. The light source 102 may be arranged in parallel with the first direction.

6B, the reflector 104 may be formed with a cover 130 for covering an upper portion of the light source 102 of the submodule adjacent to the area far from the light source 102. As shown in FIG.

That is, the reflector 104 formed of a reflector structure having a right triangular cross-section may be formed in a concave shape on one side, and a light source 102 of a neighboring submodule may be seated in the groove.

Here, the cover 130 of the reflector 104 may be formed as a curved surface having a predetermined curvature on the surface facing the light source 102 of the adjacent submodule, and a reflective layer 132 is formed on the curved surface It may also serve as a reflection mirror.

The cover 130 having the reflective layer 132 formed thereon serves to reflect the light from the light source 102 to the reflective surface of the reflective portion 104 and reflects a part of the light generated from the light source 102, Shielding film so that the light reflected at the upper portion has a uniform brightness.

The reflective portion 104 and the light source 102 may be supported by an outer cover 120 such as a bottom cover plate.

The backlight structure of FIG. 6B is advantageous in that the overall structure is simple and the weight can be reduced, since there is no need to add the reflective mirror 106 as compared with the backlight structure of FIG. 6A.

As described above, the thickness of the region adjacent to the light source 102 and the thickness of the region distant from the light source 102 can be made different from each other.

In addition, at least one of a coupling groove and a coupling protrusion may be formed on a part of the surface of the reflective portion 104 for coupling with a neighboring submodule.

2A to 2C, the reflective portion 104 may have the first and second engagement members 202 and 204 and the second engagement member 206. As shown in FIGS.

Here, the first coupling members 202 and 204 serve to connect the submodules arranged in the first direction of the horizontal plane, and the second coupling member 206 serves to connect the submodules arranged in the second direction of the horizontal plane Can play a role.

The first engaging members 202 and 204 may be formed on both sides of the reflecting portion 204. For example, a groove-shaped first engaging member 204 is formed on one side of the reflecting portion 204 And a protruding first engaging member 202 may be formed on the other side surface corresponding thereto.

Accordingly, the groove-shaped first engaging member 204 is associated with the protruding first engaging member 202 formed on the side of the reflective portion 104 of the neighboring submodule, The first sub-module 202 may be coupled to the groove-shaped first coupling member 204 formed on the side of the reflective portion 104 of the adjacent sub-module.

The second coupling member 206 may be formed in the shape of an engaging groove or a coupling protrusion at the lower end of the reflective portion 104 located in a region distant from the light source 102 and may be combined with the adjacent submodule.

For example, as shown in FIG. 2A, the coupling protrusion, which is the second coupling member 206 formed on the lower portion of the reflection unit 104, is a third coupling member 208 formed on the upper part of the reflection mirror 106 of the neighboring sub- And can be coupled to the coupling groove.

In this embodiment, the engaging member in the form of a groove and a projection is used, but in addition to this, various engaging members can be used.

2A, the fixing part 108 is connected to one side of the reflecting part 104 to fix the reflecting part 104 and to support the light source 102. In some cases, This is possible.

Here, the fixing portion 108 is disposed parallel to the surface of the optical sheet, and the reflecting portion 104 connected to one side of the fixing portion 108 may be formed to be inclined at an angle from the surface of the fixing portion 108.

In this way, the fixing portion 108 may be connected to one side of the reflection portion 104, but may be manufactured in various embodiments.

Figs. 7A to 7E show another embodiment showing the fixing portion of Fig. 2A.

7A shows a structure in which the fixing portion 108 is coupled to the upper side of the inclined surface of the reflective portion 104. The reflective portion 104 has a reflective surface inclined at an angle of about 0-85 degrees with respect to the horizontal surface, And a fixing portion 108 formed in a direction perpendicular to the horizontal plane.

7B shows a structure in which the fixing portions 108a and 108b are mounted on the upper side and the lower side of the inclined surface of the reflecting portion 104 and includes a reflecting portion having a reflecting surface inclined at an angle of about 0-85 degrees with respect to the horizontal plane, The first fixing portion 108a is coupled to the lower region of the reflective portion 104 and the second fixing portion 108b is formed on the upper region of the reflective portion 104 in a direction perpendicular to the horizontal plane.

Here, the reflector structure having two fixing portions may be more stable than the reflector structure having one fixing portion, but has a disadvantage that the weight of the reflecting portion is heavier.

7C shows a structure in which the fixing portion 108 is positioned below the reflection surface of the reflection portion 104. The lower surface of the reflection portion 104 and the upper surface of the fixing portion 108 are arranged to face each other The distance between the lower surface of the reflective portion 104 and the upper surface of the fixing portion 108 gradually increases as the reflective portion 104 and the fixing portion 108 are connected to each other.

7D and 7E are views for preventing the inclined angle of the reflecting surface from being changed by an external impact, and the lower surface of the reflecting portion 104 and the fixing portion 108 are formed as shown in FIG. 7D. At least one spacer 125 may be additionally provided between the upper surface of the reflective portion 104 and the upper surface of the fixing portion 108 as shown in Figure 7E, (127) may be additionally provided.

Here, the elastic body 127 may be an elastic structure such as a spring or a thermoplastic elastic body made of a polymer material or the like.

2A, the present embodiment may further include a reflection mirror 106 connected to the fixing unit 108 and reflecting the light of the light source 102 toward the reflection unit 104. In this case,

Here, at least one of coupling grooves and coupling protrusions for coupling with the fixing portion 108 may be formed on a part of the surface of the reflection mirror 106.

In addition, at least one of coupling grooves and coupling protrusions may be formed in a part of the surface of the reflective mirror 106 for coupling with the reflective portion of the neighboring sub-module.

For example, the reflection mirror 106 may have a coupling groove, which is a third coupling member 108, formed on an outer upper surface thereof, and a coupling protrusion, which is a fourth coupling member 110, may be formed on a lower surface thereof.

Here, the coupling groove, which is the third coupling member 108 of the reflection mirror 106, can be coupled with the coupling projection, which is the second coupling member 206 of the reflection portion 104 of the neighboring submodule, Which is the fourth engaging member 110 of the fixing portion 108, can be engaged with the engaging groove which is the fifth engaging member 212 of the fixing portion 108. [

The reflection mirror 106 may be disposed so as to surround one side and the upper side of the light source 102 such that only the direction in which the reflection unit 104 is disposed is opened.

In this embodiment, the reason why the reflection mirror 106 is used is to reduce the light directing angle of the light source 102 so that the light is emitted horizontally.

The reflection mirror 106 may be formed to surround the entire surface of the light source 102 excluding the direction in which the light from the light source 102 is emitted.

The light emitted from the light source 102 travels directly toward the reflecting surface 110 of the reflecting portion 104 or is reflected by the reflecting mirror 106 to reflect the reflecting surface 110 of the reflecting portion 104 Or indirectly.

In this case, since the light emitted from the light source 102 is reduced in the directional angle by the reflecting mirror 106, most of the light travels horizontally toward the reflecting surface 110 of the reflecting portion 104, The light reflected by the reflective surface 110 of the portion 104 can be uniformly transmitted to the display panel through the optical sheet.

8A to 8D are views showing the positional relationship between the reflection mirror and the light source.

8A to 8B show a structure in which the reflecting mirror 106 is disposed so as to face the light emitting surface of the light source 102 and FIG. 8C to FIG. 8D are views in which the reflecting mirror 106 is arranged opposite to the light emitting surface of the light source 102 Is disposed in the region where the light is incident.

8A shows a structure in which the light exit surface of the vertical light source 102 faces the reflecting mirror 106 and the reflecting mirror 106 is open in a direction opposite to the light exit surface of the light source 102 And has a hemispherical shape.

8B shows a structure in which the light exit surface of the horizontal light source 102 faces the reflecting mirror 106 and the reflecting mirror 106 is open in a direction opposite to the light emitting surface of the light source 102 ).

8C shows a structure in which the light exit surface of the vertical light source 102 does not face the reflecting mirror 106. The reflecting mirror 106 is open in the same direction as the light exit surface of the light source 102, Shaped hemispherical shape.

8D shows a structure in which the light exit surface of the horizontal light source 102 does not face the reflecting mirror 106. The reflecting mirror 106 is open in the same direction as the light output surface of the light source 102, Shaped hemispherical shape.

In addition, the structure of the reflection mirror 106 may be formed in a polygonal shape having at least one folded surface.

In this embodiment, the reflecting mirror 106 is used to make the light of the light source 102 parallel, but a lens or the like may be used in front of the light emitting surface of the light source 102 instead of the reflecting mirror 106 , And a structure of a specific shape in which the light exit surface of the light source 102 is opened may be used.

As described above, the present embodiment makes it possible to reduce the light-directing angle of the light source by making the light emitted from the light source proceed in parallel by using a reflecting mirror, a lens, or the like, and is very effective in manufacturing a backlight unit with uniform brightness to be.

In this way, the submodule to be manufactured can be arranged in at least one of the first direction of the horizontal plane and the second direction perpendicular to the first direction, wherein the submodules arranged in the first direction of the horizontal plane are arranged in the submodule May be arranged such that the light sources of the light sources are arranged side by side on a straight line.

1A, the submodules arranged in the first direction of the horizontal plane are arranged such that the light sources 102 of neighboring submodules are aligned on a straight line, and the submodules arranged in the second direction of the horizontal plane The reflector 104 of each sub-module may be arranged to cover the light source 102 of the neighboring sub-module.

In some cases, the submodules arranged in the first direction of the horizontal plane may be arranged such that the light sources 102 of neighboring submodules are offset from each other.

9 is a view illustrating a backlight unit including a plurality of sub-modules according to another embodiment. As shown in FIG. 9, a sub-module arranged in a first direction of a horizontal plane includes a light source 102 And the submodules arranged in the second direction of the horizontal plane may be arranged so that the reflector 104 of each submodule covers the light source 102 of the neighboring submodule.

That is, in the embodiment of FIG. 9, the directions of light emitted from neighboring submodules are opposite to each other.

In some cases, the submodules arranged in the second direction of the horizontal plane may be symmetrically arranged so as to face each other in the adjacent submodules.

10A and 10B are views showing a backlight unit including a plurality of submodules according to another embodiment, wherein FIG. 10A is a plan view and FIG. 10B is a cross-sectional view of FIG. 10A.

As shown in FIGS. 10A and 10B, the submodules arranged in the second direction of the horizontal plane may be symmetrically arranged so as to face each other in the adjacent submodules.

That is, the submodules adjacent to each other are connected such that the upper end surfaces of the reflecting portions 104 correspond to each other, and the fixing portion 108 and the reflecting mirror 106 can be brought into contact with each other.

As such, the backlight unit in which a plurality of submodules are arranged may be disposed on the upper portion of the submodule.

The optical sheet plays a role of uniformizing the brightness of light and may use a light shielding film or the like having a different shielding pattern between a region adjacent to the light source and an area adjacent to the light source and a region having a different elongation from the light source , And a fluorescent sheet made of a fluorescent material.

Here, the optical sheets may be spaced apart from the submodules, or may be disposed in contact with the submodules.

11 is a view showing a backlight unit having an optical sheet, FIG. 11 is a view showing an optical sheet arranged at a certain distance from a submodule of a backlight unit, FIG. 12 FIG. 12B is a view showing a supporting projection between the submodule and the optical sheet. FIG.

11, the optical sheet 160 may be spaced apart from the submodule of the backlight unit such that the optical sheet 160 is brought into contact with the submodule of the backlight unit, as shown in FIG. 12A. And a transparent resin layer 164 may be formed between the optical sheet 160 and the reflective portion 104 of the submodule. The transparent resin layer 164 may be formed by vacuum, air, or gas filled air gaps.

The transparent resin layer 164 transmits and diffuses the light emitted from the light source 102 to uniformly distribute the light emitted from the light source 102 to the display panel.

The transparent resin layer 164 may be made of a light-transmitting material, for example, silicone or acrylic resin.

However, the transparent resin layer 164 is not limited to the above materials and may be made of various resins.

In addition, the transparent resin layer 164 may be formed of a resin having a refractive index of about 1.4 to 1.6 so that light emitted from the light source 102 is diffused and the backlight unit has a uniform luminance.

For example, the transparent resin layer 164 may be made of a material selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyepoxy And the like.

The transparent resin layer 164 may include a polymer resin having adhesion so as to firmly adhere to the light source 102 and the reflective portion 104.

For example, the transparent resin layer 164 may be formed of a material selected from the group consisting of unsaturated polyester, methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, n-butyl methacrylate, n-butyl methyl methacrylate, Hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, acrylamide, methylol acrylamide, glycidyl methacrylate, ethyl acrylate, isobutyl acrylate, n-butyl acrylate, 2 -Ethylhexyl acrylate polymer, a copolymer or a terpolymer, and the like, acrylic, urethane, epoxy, melamine and the like.

The transparent resin layer 164 may be formed by applying a liquid or gel-like resin onto the light source 102 and the reflective portion 104 and curing the resin.

The transparent resin layer 164 may serve as a light guide plate for guiding light generated from the light source 102.

12A, when the optical sheet 160 is in contact with the sub-module of the backlight unit, the support protrusions 162 are formed on the upper end of the reflector 104 of the sub- And the optical sheet 160 can be prevented from being damaged.

In the submodule of FIG. 2A, the reflecting surface of the reflecting portion has a predetermined slope with respect to the light emitting direction of the light source, but the reflecting surface of the reflecting portion may be arranged parallel to the light emitting direction of the light source.

That is, the light source may be arranged so as to be parallel to the reflecting surface of the reflecting portion, and the reflecting portion and the light source may be inclined so as to have a predetermined slope with respect to the horizontal surface parallel to the optical sheet.

Figs. 13A to 13C are views showing details of another embodiment of the submodule of Fig. 1A, wherein Fig. 13A is an exploded perspective view of the submodule, Fig. 13B is a sectional view of Fig. 13A, and Fig. 13C is a plan view of Fig.

13A to 13C, the submodule may include a light source 102, a reflector 104, and first and second projections 171 and 173.

Further, as occasion demands, the fixing portion 108 may further include.

Here, the reflective portion 104 may have a reflective surface 110 that is inclined at an angle from a horizontal plane parallel to the surface of the optical sheet 160 of FIG. 11 disposed at the upper portion.

The first and second protrusions 171 and 173 are arranged to face each other at opposite ends of the reflection surface 110 of the reflection portion 104 and are vertically protruded from the reflection surface 110 of the reflection portion 104 .

The light source 102 may be disposed on at least one of a side surface of the first protrusion 171 and a reflective surface 110 of the reflector 104 adjacent to the first protrusion 171.

That is, the light source 102 may be disposed on the reflective surface 110 of the reflective portion 104 so that the light output direction is parallel to the reflective surface 110 of the reflective portion 104.

The fixing part 108 protrudes from a part of the lower surface of the reflecting part 104 facing the reflecting surface 110 to support the reflecting part 104.

Here, one side of the fixing portion 108 may be in contact with one side of the neighboring submodule.

The submodule having such a structure can further arrange the transflective film 180 on the upper portion of the reflective portion 104.

14 shows a submodule of FIG. 13A having a semi-transmissive film. As shown in FIG. 14, a semi-transmissive film 180 is formed on a reflective surface 110 of the reflective portion 104 so as to face the reflective surface 110 As shown in FIG.

The transflective film 180 is supported on the first and second projecting portions 171 and 173 and may have a surface parallel to the reflective surface 110 of the reflective portion 104.

The semi-transmissive film 180 serves to uniformize the brightness of light. The semi-transmissive film 180 has a function of uniformizing the brightness of the light, and it is preferable that the transflective film 180 has a light- Or may include a fluorescent sheet made of a fluorescent material.

In addition, the semi-transmissive film 180 may be a semi-reflective film that reflects about 30 to 90% of the incident light and can absorb the remaining light. For example, a thin metal mirror, a thin metal coated Film, a thin metal-coated substrate, a multilayer polymer mirror film in which several layers of interference mirrors are laminated, and the like.

The transflective film 180 may be a reflective polarizer that transmits only the light corresponding to the polarization state, a transparent adhesive film in which the reflective particles are dispersed, or the like, and may be a reflective film having a pattern of fine holes or openings, A pyramid-shaped prism, a conical prism, an elliptic prism, or the like.

Between the semi-transmissive film 180 and the reflective portion 104, an air gap filled with vacuum, air, or gas may be provided.

In addition, the second projection 173 can prevent loss of light by reflecting the light emitted from the light source 102 by forming a reflection layer on the side facing the light source 102. [

Subsequently, the coupling members for coupling with the neighboring submodules have already been described above, and a detailed description thereof will be omitted.

As another example, the semi-transmissive film 180 may have a predetermined curvature at the surface corresponding to the reflective portion.

15, the semi-transmissive film 180 is formed such that the region adjacent to the light source 102 is supported by the first projecting portion 171, and the light source 102 is provided with a light- Is supported on the reflecting surface 110 of the reflecting portion 104 adjacent to the second projection 173. [

Thus, the semi-transmissive film 180 has a curvature that converges as the surface facing the reflective surface 110 of the reflective portion 104 is away from the light source 102. [

The semi-transmissive film 180 serves to uniformize the brightness of light. The semi-transmissive film 180 has a function of uniformizing the brightness of the light, and it is preferable that the polarizing plate having a different elongation from the light source and the region adjacent to the light source, A light shielding film or the like may be used, or a fluorescent sheet made of a fluorescent material may be included.

In addition, the semi-transmissive film 180 may be a semi-reflective film that reflects about 30 to 90% of the incident light and can absorb the remaining light. For example, a thin metal mirror, a thin metal coated Film, a thin metal-coated substrate, a multilayer polymer mirror film in which several layers of interference mirrors are laminated, and the like.

The transflective film 180 may be a reflective polarizer that transmits only the light corresponding to the polarization state, a transparent adhesive film in which the reflective particles are dispersed, or the like, and may be a reflective film having a pattern of fine holes or openings, A pyramid-shaped prism, a conical prism, an elliptic prism, or the like.

Between the semi-transmissive film 180 and the reflective portion 104, an air gap filled with vacuum, air, or gas may be provided.

As described above, the semi-transmissive film 180 having a curvature has a better light diffusing effect, so that the brightness of light can be uniformly controlled.

16A and 16B are views showing a backlight unit including the submodules of FIG. 14, wherein FIG. 16A is a plan view and FIG. 16B is a sectional view of FIG. 16A.

As shown in FIGS. 16A and 16B, the backlight unit may be arranged in at least one of the first direction of the horizontal plane and the second direction perpendicular to the first direction.

In each submodule 100, the light source 102 may be disposed on the reflective portion 104 such that the direction of light exit is parallel to the reflective surface of the reflective portion 104.

The fixing part 108 may protrude from a part of the lower surface of the reflecting part 104 facing the reflecting surface to support the reflecting part 104.

Here, one side of the fixing portion 108 may be in contact with one side of the neighboring submodule.

That is, one side of the fixing portion 108 may contact the first projection 171 of the neighboring submodule to support the neighboring submodule, or may be coupled by a predetermined coupling member.

In this way, the sub-modules 100 arranged in the first direction of the horizontal plane are arranged such that the light sources 102 of the neighboring sub-modules 100 are arranged side by side on a straight line, .

The submodule 100 arranged in the second direction of the horizontal plane is arranged to cover the light source 102 of the neighboring submodule 100 by the reflector 104 of each submodule 100, The fixed portion 108 of the submodule 100 may be coupled by a coupling member to support the neighboring submodule 100.

A transflective film 180 is disposed above the reflective portion 104 of each submodule 100 and a transflective film 180 located above the light source 102 of each submodule 100 The sub-module may be located below the reflector 104 of the sub-module.

In some cases, the sub-modules 100 arranged in the first direction of the horizontal plane may be arranged such that the light sources 102 of the neighboring sub-modules 100 are offset from each other.

That is, the submodule 100 arranged in the first direction of the horizontal plane may be arranged such that the light sources 102 of the neighboring submodules 100 are shifted from each other, or the submodules 100 May be arranged so that the reflector 104 of each sub-module 100 covers the light source 102 of the neighboring sub-module 100.

In this case, directions of light emitted from neighboring submodules 100 are opposite to each other.

In some cases, the submodules 100 arranged in the second direction of the horizontal plane may be arranged symmetrically so that the adjacent submodules 100 face each other.

The submodules adjacent to each other are connected so that the top surfaces of the reflecting portions 104 correspond to each other, and the fixing portions 108 can be contacted to correspond to each other.

As described above, the backlight unit in which the plurality of sub modules 100 are arranged may be arranged with the optical sheet on the sub module 100.

The optical sheet plays a role of uniformizing the brightness of light and may use a light shielding film or the like having a different shielding pattern between a region adjacent to the light source and an area adjacent to the light source and a region having a different elongation from the light source , And a fluorescent sheet made of a fluorescent material.

Here, the optical sheets may be spaced apart from the submodules, or may be disposed in contact with the submodules.

17 is a view showing an optical sheet disposed at a certain distance from a submodule of a backlight unit, and FIG. 18A is a view showing an optical sheet disposed on a submodule of a backlight unit And FIG. 18B is a view showing a support projection between the submodule and the optical sheet. FIG.

As shown in FIG. 17, the optical sheet 160 may be disposed at a certain distance from the submodule of the backlight unit, and the optical sheet 160 may be arranged to be in contact with the submodule of the backlight unit, as shown in FIG. And a transparent resin layer 164 may be formed between the optical sheet 160 and the reflective portion 104 of the submodule. The transparent resin layer 164 may be formed by vacuum, air, or gas filled air gaps.

The transparent resin layer 164 transmits and diffuses the light emitted from the light source 102 to uniformly distribute the light emitted from the light source 102 to the display panel.

Since the transparent resin layer 164 is the same as that of FIG. 11, detailed description is omitted.

18A, when the optical sheet 160 is in contact with the sub-module of the backlight unit, the support protrusions 162 are formed on the upper end of the reflector 104 of the sub- And the optical sheet 160 can be prevented from being damaged.

In the submodule of Fig. 18A, the reflecting surface of the reflecting portion can be arranged in parallel to the light emitting direction of the light source.

That is, the light source may be arranged so as to be parallel to the reflecting surface of the reflecting portion, and the reflecting portion and the light source may be inclined so as to have a predetermined slope with respect to the horizontal surface parallel to the optical sheet.

Meanwhile, the backlight unit of the present embodiment may further include a light transmitting supporter 500.

19A to 19E are views showing a backlight unit including a light transmitting supporter.

The light transmission supporter 500 may be disposed in a space between the reflective portion 104 and the optical sheet to transmit light emitted from the light source 102 and to support the optical sheet.

For example, when the light transmitting supporter 500 is applied to the submodule of FIG. 13A, the first and second protrusions 171 and 173 may be omitted because the transflective film 180 can be supported. You may.

Here, as shown in FIG. 19A, at least one of the light transmitting supporters 500 may be arranged in a stripe shape along the column direction of the reflective portion 104.

In this case, the width W1 of the area adjacent to the light source 102 and the width W2 of the area far from the light source are substantially the same in the light transmitting supporter 500.

The light transmitting supporter 500 may be made of a light transmitting material, for example, silicone or acrylic resin.

However, the light transmission supporter 500 is not limited to the above-described materials and may be made of various materials.

In addition, the light transmitting supporter 500 may be formed of a material having a refractive index of about 1.4 to 1.6 so that the light emitted from the light source 102 can be uniformly diffused.

For example, the light transmitting supporter 500 may be formed of a material selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyepoxy And the like.

The light transmitting supporter 500 may include a polymer material to firmly support the optical sheet.

For example, the light transmitting supporter 500 may be formed of a material such as unsaturated polyester, methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, n-butyl methacrylate, n-butyl methyl methacrylate, Hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, acrylamide, methylol acrylamide, glycidyl methacrylate, ethyl acrylate, isobutyl acrylate, n-butyl acrylate, 2 -Ethylhexyl acrylate polymer, a copolymer or a terpolymer, and the like, acrylic, urethane, epoxy, melamine and the like.

The light transmission supporter 500 can be formed by applying a resin in a liquid or gel state and curing it.

19B, the upper surface width of the light transmitting supporter 500 can be gradually reduced as the distance from the light source 102 increases.

That is, in the light transmitting supporter 500, the upper surface width W2 of the area farther from the light source 102 than the upper surface width W1 of the area adjacent to the light source 102 becomes smaller.

The reason for this is that the luminance of the region adjacent to the light source 102 is reduced and the luminance of the region farther from the light source 102 is increased.

That is, since the area of the light transmitting supporter 500 is wide in the area adjacent to the light source 102, the light diffusion and brightness can be blocked. In the area far from the light source 102, Since it is narrow, the diffusion and brightness of light can be improved or maintained. Thus, a backlight having uniform brightness can be obtained as a whole.

19C shows a structure in which the individual units of the light transmission supporter 500 are arranged side by side along the column direction of the reflection unit 104. [

As shown in FIG. 19C, the reason why the light transmitting supporters 500 are separated into a plurality of individual units is because the brightness of the light can be improved as a whole as compared with the backlight using the light transmitting supporter 500 in the stripe form.

19D is a structure in which individual units of the light transmission supporter 500 are alternately arranged along the column direction of the reflection unit 104. [

19E is a structure in which the number of individual units of the light transmitting supporter 500 gradually decreases along the column direction of the reflecting portion 104. [

19E, there is an effect that light diffusion and brightness can be blocked by increasing the number of individual units of the light transmission supporter 500 in the area adjacent to the light source 102. In the area far from the light source 102, Since the number of individual units of the light source 500 is reduced, diffusion and brightness of light can be improved or maintained, and thus a backlight having a uniform luminance as a whole can be obtained.

20 is a view showing a display module having a backlight unit according to the present embodiment.

As shown in FIG. 20, 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 so as to maintain a uniform cell gap, and between the two substrates 810 and 820 A liquid crystal layer (not shown) may be interposed.

The color filter substrate 810 includes a plurality of pixels composed of red (R), green (G), and blue (B) subpixels and generates images corresponding to red, green, .

The pixels may be composed of red, green, and blue subpixels, but the red, green, blue, and white (W) subpixels constitute one pixel.

The TFT substrate 820 can switch a pixel electrode (not shown) as an element in which switching elements are formed.

For example, the common electrode (not shown) and the pixel electrode can change the arrangement of molecules in the liquid crystal layer according to a predetermined voltage applied from outside.

The liquid crystal layer is composed of a plurality of liquid crystal molecules, and the liquid crystal molecules change their arrangement in accordance with the voltage difference generated between the pixel electrode and the common electrode.

Thereby, the light provided from the backlight unit 700 can be incident on the color filter substrate 810 in accordance with the change of the molecular arrangement of the liquid crystal layer.

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.

As shown in FIG. 20, the display module can be configured by placing a backlight unit 700 closely in the display panel 800. [

For example, the backlight unit 700 may be adhered and fixed to the lower surface of the display panel 800, more specifically, the lower polarizer plate 840, and between the lower polarizer plate 840 and the backlight unit 700 An adhesive layer (not shown) may be formed.

By forming the backlight unit 700 in close contact with the display panel 800 as described above, it is possible to improve the appearance by reducing the overall thickness of the display device, and the additional structure for fixing the backlight unit 700 can be removed So that the structure and manufacturing process of the display device can be simplified.

In addition, by removing the space between the backlight unit 700 and the display panel 800, it is possible to prevent a malfunction of the display device or deterioration of the image quality of the display image due to the infiltration of foreign matter into the space.

The backlight unit 700 according to the present embodiment may have a stacked structure of a plurality of functional layers, and at least one of the plurality of functional layers may include a plurality of light sources (not shown).

The plurality of functional layers constituting the backlight unit 700, more specifically, the backlight unit 700, are each flexible so that the backlight unit 700 is closely attached to the lower surface of the display panel 800 and fixed. ). ≪ / RTI >

The display panel 800 according to the present embodiment may be divided into a plurality of regions and may be divided into a plurality of regions and a plurality of regions corresponding to the gray peak values or the color coordinate signals of the divided regions, The brightness of the display panel 800 can be adjusted by adjusting the brightness, i.e., the brightness of the corresponding light source.

To this end, the backlight unit 700 may be divided into a plurality of divided driving regions corresponding to the divided regions of the display panel 800 and operated.

21 and 22 are views showing a display device according to the present embodiment.

21, 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 transparent front panel (not shown) that transmits light. The front panel protects the display module 20 at regular intervals, and the light emitted from the display module 20 So that an image displayed on the display module 20 is displayed from the outside.

Further, the front cover 30 can be made of a flat plate without the window 30a.

In this case, the front cover 30 is made of a transparent material that transmits light, for example, an injection-molded plastic.

Thus, if the front cover 30 is formed as a flat plate, the frame can be removed from the front cover 30. [

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.

22, 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.

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.

Claims (22)

Optical sheet;
And a light source that is disposed on at least one side of the reflective portion and transmits light to the reflective surface of the reflective portion, A plurality of submodules arranged in at least one of a first direction and a second direction perpendicular to the first direction; And,
And a coupling unit for coupling adjacent submodules among the plurality of submodules,
The sub-
A reflecting portion having a reflecting surface inclined at a predetermined angle from a horizontal plane parallel to the optical sheet surface;
First and second protrusions arranged to face each other at both ends of the reflection surface of the reflection portion and vertically protruding from the reflection surface of the reflection portion;
And a semi-transmissive film disposed at a predetermined distance from the reflective surface so as to face the reflective surface of the reflective portion,
Wherein the light source is disposed on at least one of a side surface of the first projecting portion and a reflecting surface of the reflecting portion adjacent to the first projecting portion. The optical module according to claim 1, further comprising:
And an air gap between the semi-transmissive film and the reflective surface of the reflective portion. The apparatus of claim 1, wherein the sub-
A fixing part connected to one side of the reflecting part and parallel to the optical sheet surface;
And a reflecting mirror connected to the fixing portion and reflecting the light of the light source toward the reflecting portion,
Wherein the light source is disposed on the fixing portion,
Wherein the reflective mirror surrounds one side and the upper side of the light source such that only the direction in which the reflective portion is disposed is opened. delete [5] The apparatus of claim 3, wherein at least one of a coupling groove and a coupling projection for coupling with the fixing portion is formed on a part of the surface of the reflection mirror,
Wherein at least one of engaging grooves and engaging projections for engaging with the reflecting mirror is formed on a part of the surface of the fixing portion. 4. The sub-module according to claim 3, wherein at least one of engaging grooves and engaging projections for engaging with the reflective portion of the adjacent sub-module is formed in a part of the surface of the reflective mirror,
Wherein at least one of an engaging groove and an engaging projection for engaging with the adjacent submodule is formed in a part of the surface of the reflective portion, and the reflective portion has a thickness of a region adjacent to the light source and a thickness of a region distant from the light source, . delete delete delete delete delete The method of claim 1, wherein the semi-
And a surface supported by the first projecting portion and the second projecting portion and having a surface parallel to the reflecting surface of the reflecting portion. The display device according to claim 1, wherein the semi-transmissive film is supported by the first projecting portion, and has a surface having a curvature with respect to the reflective surface of the reflective portion. delete [2] The apparatus according to claim 1, wherein the reflective portion includes a fixing portion protruding from a part of a lower surface facing the reflective surface to support the reflective portion, wherein one side of the fixing portion is in contact with a side surface of the adjacent submodule Display device. delete The display device according to claim 1, wherein at least one of engaging grooves and engaging projections for engaging with the neighboring submodules is formed in a part of a surface of the reflective portion. [2] The apparatus according to claim 1, wherein the submodules arranged in the first direction of the horizontal plane are arranged such that the light sources of the adjacent submodules are aligned on a straight line or the light sources of the adjacent submodules are arranged to be offset from each other And,
Wherein the submodules arranged in the second direction of the horizontal plane are arranged to cover the light sources of the neighboring submodules,
Wherein the submodules arranged in the second direction of the horizontal plane are symmetrically arranged so as to face each other with respect to adjacent submodules. delete delete The apparatus of claim 1,
A first joining member connecting the submodules arranged in the first direction of the horizontal plane and a second joining member joining the submodules arranged in the second direction of the horizontal plane,
Wherein at least one of the first and second coupling members is formed in a reflecting portion of each sub-module. The display device according to claim 1, wherein each of the sub-modules includes a support projection for supporting the optical sheet.

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