KR101832311B1 - Display apparatus - Google Patents

Abstract

The present invention relates to a backlight unit and a display device using the same, which includes a reflector, a light source module disposed on a reflector, and a lens covering the light source module, the lens including at least one first groove formed in the upper surface, And at least one second groove formed in the lower surface, wherein the first groove and the second groove are disposed to correspond to each other, and the light source module can be disposed in the second groove of the lower surface.

Description

[0001]

An embodiment relates to a display device.

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.

The embodiment attempts to provide a display device having an air guide by deforming the shape of a lens covering the light source module.

An embodiment includes a reflector, a light source module disposed over the reflector, and a lens covering the light source module, wherein the lens has at least one groove formed in its lower surface, have.

Here, the groove of the lens may be at least one of a V-shaped stripe having a peak point and a side inclined, a cone, a triangular pyramid, a quadrangular pyramid, a polygonal pyramid, and a hemispherical shape.

The ratio of the depth of the groove to the maximum height of the lens may be 0.1 - 0.9: 1, and the side surface of the groove may be a concave curved surface or a flat surface.

Another embodiment includes a reflector, a light source module disposed over the reflector, and a lens covering the light source module, wherein the lens has at least one first groove formed in the upper surface and at least one first groove formed in the lower surface, And the first groove and the second groove are disposed to correspond to each other, and the light source module can be disposed in the second groove of the lower surface.

Here, the first and second grooves of the lens may be at least one of a V-shaped stripe having a peak point and a side inclined, a cone, a triangular pyramid, a quadrangular pyramid, a polygonal pyramid, and a hemispherical shape.

The first groove and the second groove may be arranged to face each other with a first gap therebetween.

The ratio of the first distance to the maximum height of the lens may be 0.01-0.5: 1, and the ratio of the depth of the first groove or the second groove to the maximum height of the lens may be 0.1-0.5: 1.

Further, the depth of the second groove may be deeper than the depth of the first groove, and the depth ratio of the first groove and the second groove may be 0.5 - 0.99: 1.

At this time, the side surface of the first groove may be convex curved surface or plane, and the side surface of the second groove may be concave curved surface or plane.

Another embodiment includes a reflector, a plurality of light source modules disposed on the reflector, a plurality of lenses that correspond one-on-one to each light source module and cover the light source module, and each lens includes at least one And the at least one second groove formed in the lower surface, wherein the first groove and the second groove are disposed to correspond to each other, and the light source module can be disposed in the second groove of the lower surface.

Here, the lenses adjacent to each other may be disposed apart from each other at the first interval.

At least one of the side surfaces of the first groove and the second groove may have a concavo-convex shape, and the lens may be made of polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP) ), Polyethylene (PE), polystyrene (PS), polyepoxy (PE), silicone, and acrylic.

The reflector may then include at least one inclined surface and at least one flat surface.

Next, the embodiment may further include an optical member disposed at a predetermined interval from the reflector, and an air guide may be formed in a space between the reflector and the optical member.

Embodiments can provide a backlight unit for an error guide that can reduce the weight of the backlight unit, enable mass production, and provide uniform brightness by using a lens that covers the light source module instead of the light guide plate.

1 is a cross-sectional view showing a backlight unit according to an embodiment
2A and 2B are views showing a lens according to the first embodiment;
Figs. 3A and 3B are views showing a lens according to the second embodiment
4 is a view showing a lens according to the third embodiment;
5A to 5C are views showing a lens in which the side surface of the first groove is curved and the side surface of the second groove is flat
6A to 6C are views showing a lens in which the side surfaces of the first and second grooves are flat;
7A to 7C are views showing a lens in which the side surfaces of the first and second grooves are curved surfaces
8A to 8C are views showing a lens in which the side surface of the first groove is flat and the side surface of the second groove is curved;
Figures 9-13 illustrate various reflectors.
14 is a view showing a display module having a backlight unit according to an embodiment
15 and 16 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 present embodiment, in the case of being described as being formed "on or under" of each element, the upper (upper) or lower (lower) on or under includes both the two elements being directly in contact with each other or one or more other elements being indirectly formed between the two elements.

Also, when expressed as "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

1 is a sectional view showing a backlight unit according to an embodiment.

1, the backlight unit includes a lens 20, a reflector 30, an optical member 40, and a light source module 50 .

Here, the reflector 30 may be divided into first, second, and third regions, where the first region may be located between the second region and the third region.

And, the second region may be a curved surface having a first curvature R1, the third region may be a curved surface having a second curvature R2, and the second region may be a flat surface.

At this time, the first curvature R1 of the second region may be the same as the second curvature R2 of the third region, but may be different from each other in some cases.

The first, second, and third regions of the reflector 30 may all be planar. The second and third regions may be inclined planes inclined at an angle from the first region, or the second, third, The region may be a vertical plane from the first region.

And, a high reflectance, such as reflector 30 may comprise at least one of a metal or metal oxide, e.g., aluminum (Al), silver (Ag), gold (Au) or titanium dioxide (TiO ₂₎ The branch may comprise a metal or a metal oxide.

The lens 20 may then be disposed in a first region of the reflector 30 wherein at least one first groove 22 is formed on the upper surface of the lens 20 and a second groove 22 is formed on the lower surface of the lens 20 At least one second groove 24 may be formed.

Here, the lens 20 may include regions 1-1, 1-2, 1-3, where the 1-1 region may be located between the 1-2 region and the 1-3 region. have.

The first groove 22 formed on the upper surface of the lens 20 and the second groove 24 formed on the lower surface of the lens 20 may be located in the 1-1 zone of the lens 20.

The first-second region of the lens 20 may be a curved surface having the third curvature R3, and the first-third region may be a curved surface having the fourth curvature R4.

Here, the third curvature R3 of the first-second region may be the same as the fourth curvature R4 of the first-third region, but may be different from each other in some cases.

The third curvature R3 of the first region may be equal to at least one of the first curvature R1 of the second region of the reflector 30 and the second curvature R2 of the third region.

The fourth curvature R4 of the first region may be equal to at least one of the first curvature R1 of the second region of the reflector 30 and the second curvature R2 of the third region.

In some cases, at least one of the first-second region and the first-third region of the lens 20 may be partially inclined planes.

The first groove 22 and the second groove 24 of the lens 20 may be arranged to correspond to each other. The first groove 22 and the second groove 24 are spaced apart from each other .

Here, at least one of the first groove 22 and the second groove 24 may be in a stripe shape arranged in one direction.

At least one of the first groove 22 and the second groove 24 may have a dot shape in which adjacent grooves are spaced apart from each other by a predetermined distance.

In addition, the first and second grooves 22 and 24 of the lens 20 may have at least one of a V-shaped stripe having a peak point and a side inclined, a cone, a triangular pyramid, a polygonal pyramid, It can be either.

The lens 20 may be made of a translucent material such as polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP), polyethylene (PE) , Polystyrene (PS), polyepoxy (PE), silicone, acryl, and the like.

Meanwhile, the light source module 50 may be disposed in the second groove 24 of the lower surface of the lens 20.

The light source module 50 may include a substrate 54 and at least one light source 52 disposed on the substrate 54. The substrate 54 may include a stripe- ), As shown in Fig.

Both the substrate 54 and the light source 52 may then be placed inside the second groove 24 of the lens 20 and the substrate 54 is placed outside the second groove 24 of the lens 20 And the light source 52 may be disposed inside the second groove 24 of the lens 20.

The substrate 54 of the light source module 50 may have an electrode pattern for connecting the adapter that supplies power and the light source 52.

For example, an electrode pattern for connecting the light source 52 and the adapter may be formed on the upper surface of the substrate 54.

The substrate 54 may be a printed circuit board (PCB) substrate made of any one material selected from the group consisting of polyethylene terephthalate (PET), glass, polycarbonate (PC), and silicon (Si) .

In addition, the substrate 54 can be selectively used as a single layer PCB, a multilayer PCB, a ceramic substrate, a metal core PCB, or the like.

Also, at least one light source 52 may be disposed on the substrate 54, and the light source 52 may be a top view type light emitting diode.

In some cases, the light source 52 may be a side view type light emitting diode.

As described above, the light source 52 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 a red LED chip, a green LED chip, a blue LED chip, green LED chips, and white LED chips.

Here, the white LED may be realized by combining a yellow phosphor on a blue LED or using a red phosphor and a green phosphor on a blue LED at the same time, and a yellow phosphorescent phosphor (Yellow phosphor), Red phosphor (Phosphor) and Green phosphor (Phosphor).

Next, the optical member 40 may be disposed at a predetermined distance from the reflector 30, and an air guide is formed in the space between the reflector 30 and the optical member 40 .

Here, the optical member 40 is for diffusing light emitted through the lens 20, and may be formed with an irregular pattern on the upper surface to increase the diffusion effect.

In addition, the optical member 40 may be formed in a plurality of layers, and the concavo-convex pattern may be on the surface of the uppermost layer or any one layer.

The concavo-convex pattern may have a strip shape arranged along the light source module 50.

At this time, the concavo-convex pattern has protrusions on the surface of the optical member 40, and the protrusions consist of a first surface and a second surface facing each other, and an angle between the first surface and the second surface may be an obtuse angle or an acute angle.

Optionally, the optical member 40 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.

As described above, in the embodiment, the lens 20 covering the light source module 50 is disposed, so that light can be refracted to be wide radiation.

That is, the lens 20 can refract light so that light having the maximum intensity occurs within a range of about 50 to 80 degrees from the central axis of the light source 52. [

2A and 2B are views showing a lens according to the first embodiment, wherein FIG. 2A is a cross-sectional view of the lens and FIG. 2B is a perspective view of the lens.

As shown in FIGS. 2A and 2B, the lens 20 may include at least one first groove 22 formed in the upper surface and at least one second groove 24 formed in the lower surface. have.

Here, the first groove 22 and the second groove 24 may be arranged to correspond to each other, and the light source module 50 may be disposed in the second groove 24 of the lower surface.

The light source module 50 may also include a substrate 54 and at least one light source 52 disposed on the substrate 54. The substrate 54 may include a stripe- ), As shown in Fig.

The first and second grooves 22 and 24 of the lens 20 have at least one of a V-shaped stripe having a peak point and a side inclined, a cone, a triangular pyramid, a quadrangular pyramid, a polygonal pyramid, It can be either.

Here, the first groove 22 and the second groove 24 may be disposed to face each other with a first distance d1.

At this time, the ratio of the first distance d1 to the maximum height d2 of the lens 20 may be about 0.01 - 0.5: 1.

This is because if the first distance d1 is too small, the refraction of light may be reduced and wide radiation may be difficult, and if the first distance d1 is too large, the light source module 50 may be located outside the second groove 24 The thickness of the entire backlight unit can be increased.

The ratio of the depth h2 of the first groove 22 or the depth h1 of the second groove 24 to the maximum height d2 of the lens 20 may be about 0.1 - 0.5: 1.

The depth h1 of the second groove 22 may be deeper than the depth h2 of the first groove 22.

At this time, the ratio between the depth h2 of the first groove 22 and the depth h1 of the second groove 24 may be about 0.5 - 0.99: 1.

This is because the light source module 50 must be disposed in the second groove 24.

In some cases, the depth h1 of the second groove 22 may be equal to the depth h2 of the first groove 22.

Then, the width w2 of the second groove 24 may be larger than the width w1 of the light source module 50.

This is because the light source module 50 must be disposed in the second groove 24.

Next, the side surface of the first groove 22 may be a convex curved surface or a plane, and the side surface of the second groove 24 may be a concave curved surface or a flat surface.

The area of one side of the first groove 22 on the upper surface of the lens 20 may be a curved surface having the third curvature R3 and the other side of the first groove 22 may be curved surface having the fourth curvature R4 .

Here, the third curvature R3 may be the same as the fourth curvature R4, but may be different from each other in some cases.

The lens 20 may be made of a translucent material such as polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP), polyethylene (PE) , Polystyrene (PS), polyepoxy (PE), silicone, acryl, and the like.

In some cases, at least one of the side surfaces of the first groove 22 and the second groove 24 may have a concavo-convex shape.

Here, the concave-convex shape may increase the refraction of light to increase the wide radiation effect.

FIGS. 3A and 3B are views showing a lens according to a second embodiment, wherein FIG. 3A is a cross-sectional view of the lens and FIG. 3B is a perspective view of the lens.

3A and 3B, the lens 20 is formed with at least one groove 24 on the lower surface thereof, and the light source module 50 including the light source 52 and the substrate 54 includes a lens 20) grooves 24 in the lower surface.

Here, the groove 24 of the lens 20 may be at least one of a V-shaped stripe having a peak point and a side inclined, a cone, a triangular pyramid, a quadrangular pyramid, a polygonal pyramid, and a hemispherical shape.

The ratio of the depth h3 of the groove 24 to the maximum height d4 of the lens 20 may be about 0.1 - 0.9: 1.

This is because if the depth of the groove 24 is too large, the light refraction is reduced and wide radiation may be difficult, and if the depth of the groove 24 is too small, The thickness of the entire backlight unit can be increased.

Further, the side surface of the groove 24 may be a concave curved surface or a flat surface, and the upper surface of the lens 20 may be a convex curved surface.

In some cases, the side surface of the groove 24 may have a concavo-convex shape.

Here, the concave-convex shape may increase the refraction of light to increase the wide radiation effect.

4 is a view showing a lens according to the third embodiment.

As shown in FIG. 4, a plurality of lenses 20 may be disposed on the reflector 30 at regular intervals.

At least one first groove 22 may be formed on the upper surface of each lens 20 and at least one second groove 24 may be formed on the lower surface of each lens 20.

Here, the first grooves 22 formed on the upper surface of each lens 20 may be disposed so as to face each other in a one-to-one correspondence with the second grooves 24 formed on the lower surface of the lens 20.

At this time, the first groove 22 may be in the shape of a cone having a peak point, but in some cases, the first groove 22 may have a V-shaped stripe, triangular, quadrangular, , And a hemispherical shape.

Further, the side surface of the first groove 22 may be a convex curved surface or a flat surface.

The second groove 24 may be in the form of a quadrangular pyramid having a peak point, but it may be formed of at least one of a V-shaped stripe, a cone, a triangular pyramid, a polygonal pyramid, Lt; / RTI >

Here, the side surface of the second groove 24 may be a concave curved surface or a flat surface.

The reason why the first groove 22 and the second groove 24 are formed in the upper and lower portions of the lens 20 is that the light generated by the light source 52 is refracted by the lens 20, wide radiation, and the wide-radiated light is reflected by the inclined surface of the reflector 30 and can be uniformly diffused.

The light source module 50 may be disposed in the second groove 24 of the lower surface of the lens 20.

Here, the light source module 50 may include a substrate 54 and at least one light source 52 disposed on the substrate 54, wherein the substrate 54 is disposed correspondingly within the second groove 24 .

That is, one substrate 54 may be disposed in one second groove 24, and at least one light source 52 may be disposed on one substrate 54.

In some cases, a plurality of substrates 54 may be disposed in one second groove 24, and at least one light source 52 may be disposed on one substrate 54.

Both the substrate 54 and the light source 52 may be disposed inside the second groove 24 of the lens 20 and the substrate 54 may be disposed outside the second groove 24 of the lens 20 And the light source 52 may be disposed inside the second groove 24 of the lens 20.

As described above, the plurality of lenses 20 are spaced apart from each other, and correspond one-by-one to each light source module 50 to cover the light source module 50.

Here, at least one of the side surfaces of the first groove 22 and the second groove 24 may have a concavo-convex shape.

5A to 5C are diagrams showing a lens in which the side surface of the first groove is curved and the side surface of the second groove is flat.

5A shows a top surface of the lens 20 in which the first groove 22 formed in the 1-1 zone has a curved surface shape in which the side surface 22b is convex, (20a) may have a convex curved surface shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a planar shape in which the side surface 24b is flat, and the surface of the 1-2 zone and 1-3 zone And can have a flat planar shape.

5B, the first groove 22 formed in the 1-1 zone of the upper surface of the lens 20 has a curved surface shape in which the side surface 22b is convex, The surface 20a of the base 20 can have a flat planar shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a planar shape with a flat side, and the surfaces of the 1-2 zone and the 1-3 zone also have a flat plane shape Lt; / RTI >

5C, the first groove 22 formed in the 1-1 zone of the upper surface of the lens 20 has a curved surface shape in which the side surface 22b is convex, The surface 20a of the base 20 can have a flat planar shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a planar shape in which the side surface 24b is flat, and the surface of the 1-2 zone and 1-3 zone And can have a flat planar shape.

Here, a part of the surface 20a of the first, second, and 1-3 areas of the upper surface of the lens 20 is parallel to the surfaces of the first, second, and 1-3 areas of the lower surface of the lens 20 .

6A to 6C are views showing a lens in which the sides of the first and second grooves are planar.

6A shows that the first groove 22 formed in the 1-1 zone of the upper surface of the lens 20 has a planar shape in which the side surface 22b is flat, (20a) may have a convex curved surface shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a planar shape in which the side surface 24b is flat, and the surface of the 1-2 zone and 1-3 zone And can have a flat planar shape.

6B shows that the first groove 22 formed in the 1-1 zone of the upper surface of the lens 20 has a planar shape in which the side surface 22b is flat, And the surface 20a of the base 20 can also have a flat planar shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a planar shape with a flat side, and the surfaces of the 1-2 zone and the 1-3 zone also have a flat plane shape Lt; / RTI >

6C, the first groove 22 formed in the 1-1 zone of the upper surface of the lens 20 has a planar shape in which the side surface 22b is flat, And the surface of the substrate may have a flat planar shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a planar shape in which the side surface 24b is flat, and the surface of the 1-2 zone and 1-3 zone And can have a flat planar shape.

Here, a part of the surface 20a of the first, second, and 1-3 areas of the upper surface of the lens 20 is parallel to the surfaces of the first, second, and 1-3 areas of the lower surface of the lens 20 .

7A to 7C are views showing lenses in which the side surfaces of the first and second grooves are curved.

7A shows a top surface of the lens 20 in which the first groove 22 formed in the 1-1 zone has a curved surface shape in which the side surface 22b is convex, (20a) may have a convex curved surface shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a concave surface shape in which the side surface 24b is concave. And can have a flat planar shape.

7B, the first groove 22 formed in the 1-1 zone of the upper surface of the lens 20 has a curved surface shape in which the side surface 22b is convex, The surface 20a of the base 20 can have a flat planar shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a concave curved side surface, and the surfaces of the 1-2 zone and the 1-3 zone also have a flat plane shape Lt; / RTI >

7C, the first groove 22 formed in the 1-1 zone of the upper surface of the lens 20 has a curved surface shape in which the side surface 22b is convex, The surface 20a of the base 20 can have a flat planar shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a concave surface shape in which the side surface 24b is concave. And can have a flat planar shape.

Here, a part of the surface 20a of the first, second, and 1-3 areas of the upper surface of the lens 20 is parallel to the surfaces of the first, second, and 1-3 areas of the lower surface of the lens 20 .

8A to 8C are views showing a lens in which the side surface of the first groove is flat and the side surface of the second groove is curved.

8A shows that the first groove 22 formed in the 1-1 zone of the upper surface of the lens 20 has a planar shape in which the side surface 22b is flat, (20a) may have a convex curved surface shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a concave surface shape in which the side surface 24b is concave. And can have a flat planar shape.

8B shows that the first groove 22 formed in the 1-1 zone of the upper surface of the lens 20 has a planar shape in which the side surface 22b is flat, And the surface 20a of the base 20 can also have a flat planar shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a concave curved side surface, and the surfaces of the 1-2 zone and the 1-3 zone also have a flat plane shape Lt; / RTI >

Next, FIG. 8C shows that the first groove 22 formed in the 1-1 zone of the upper surface of the lens 20 has a planar shape in which the side surface 22b is flat, And the surface 20a of the base 20 can also have a flat planar shape.

Of the lower surface of the lens 20, the second groove 24 formed in the 1-1 zone has a curved surface shape in which the side surface 24b is concave, and the surface of the 1-2 zone and 1-3 zone And can have a flat planar shape.

Here, a part of the surface 20a of the first, second, and 1-3 areas of the upper surface of the lens 20 is parallel to the surfaces of the first, second, and 1-3 areas of the lower surface of the lens 20 .

Figs. 9-13 illustrate various reflectors.

First, as shown in Fig. 9, the reflector 30 may be formed on a bottom chassis 70. [0051]

Here, the central region of the bottom chassis 70 is a flat plane, and the edge region can have a concave curved surface.

The reflector 30 is disposed on the bottom chassis 70 having such a surface structure and the lens 20 and the light source module 50 can be disposed on the central region of the reflector.

Here, as in the surface structure of the bottom chassis 70, the reflector 30 may have a flat flat surface in the central region and a concave curved surface in the edge region.

The reflector 30 may include a metal or metal oxide having a high reflectance such as aluminum (Al), silver (Ag), gold (Au), titanium dioxide (TiO ₂ )

The reflector 30 may be formed of one of a reflective coating film and a reflective coating material layer, and reflects light generated from the light source module 50 toward the optical member.

10, the central area of the bottom chassis 70 is a flat plane, and the edge area may have an inclined surface inclined at an angle.

Here, the inclined surface may be a flat plane.

A reflector 30 is disposed on the bottom chassis 70 having such a surface structure, and the lens and the light source module 50 can be disposed on the central region of the reflector.

Thus, like the surface structure of the bottom chassis 70, the reflector 30 may have a flat plane in the center area and a flat inclined plane in the edge area.

11, the side surface of the bottom chassis 70 is vertically bent from the bottom surface of the bottom chassis 70, and the bottom surface and the side surface of the bottom chassis 70 may be flat.

The central area of the reflector 30 disposed on the bottom chassis 70 is flat and the edge area may have a concave curved surface.

Here, the thickness of the reflector 30 may gradually increase from the central region to the edge region.

The lens 20 and the light source module 50 can be disposed on the central region of the reflector having such a surface structure.

Thus, the surface structure of the reflector 30 and the surface structure of the bottom chassis 70 may be different from each other.

12, the side surface of the bottom chassis 70 is vertically bent from the bottom surface of the bottom chassis 70, and the bottom surface and the side surface of the bottom chassis 70 may be flat.

The reflector 30 is disposed on the bottom chassis 70 having such a surface structure and the lens 20 and the light source module 50 can be disposed on the central region of the reflector.

Here, like the surface structure of the bottom chassis 70, the reflector 30 may be a flat surface with a bottom surface and a side surface.

At this time, the thickness of the reflector 30 may be the same from the bottom surface to the side surface of the bottom chassis 70.

Therefore, the surface structure of the reflector 30 and the surface structure of the bottom chassis 70 may be the same.

13, the bottom chassis 70 may include a support portion 70b for supporting the reflector 30 and a fixing portion 70a for fixing the support portion 70b.

Here, the support portion 70b may be made of a polymer resin such as plastic that can be injection-molded, and the fixing portion 70a may be made of a metal material.

The support portion 70b may have a flat flat surface in the central region and a concave curved surface in the edge region.

Here, the thickness of the support portion 70b may gradually increase from the central region to the edge region.

A reflector 30 is formed on the support portion 70b having such a surface structure and the lens 20 and the light source module 50 can be disposed on the central region of the reflector 30. [

At this time, the reflector 30 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 50 toward the optical member.

Here, the reflective coating film and a reflective coating material layer may include at least one of a metal or metal oxide, e.g., aluminum (Al), silver (Ag), gold (Au) or titanium dioxide (TiO ₂₎ and And may comprise a metal or metal oxide having the same high reflectance.

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

As shown in FIG. 14, the display module 200 may include a display panel 90 and a backlight unit 100.

The display panel 90 includes a color filter substrate 91 and a TFT (Thin Film Transistor) substrate 92 bonded to each other to maintain a uniform cell gap, A layer (not shown) may be interposed.

The color filter substrate 91 includes a plurality of pixels composed of red (R), green (G), and blue (B) subpixels and generates an image 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 92 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 100 can be incident on the color filter substrate 91 in accordance with the change in the molecular arrangement of the liquid crystal layer.

The upper polarizer 93 and the lower polarizer 94 may be disposed on the upper and lower sides of the display panel 90. More specifically, the upper polarizer 93 is disposed on the upper surface of the color filter substrate 91 And the lower polarizer 94 may be disposed on the lower surface of the TFT substrate 92.

Although not shown, a gate and a data driver for generating a driving signal for driving the display panel 90 may be provided on a side surface of the display panel 90.

As shown in FIG. 14, the display module 200 can be configured by closely attaching the backlight unit 100 to the display panel 90.

For example, the backlight unit 100 may be adhered and fixed to the lower surface of the display panel 90, more specifically, to the lower polarizer 94, and between the lower polarizer 94 and the backlight unit 100 An adhesive layer (not shown) may be formed.

By forming the backlight unit 100 in close contact with the display panel 90 as described above, the overall thickness of the display device can be reduced to improve the appearance and the additional structure for fixing the backlight unit 100 is removed The structure and manufacturing process of the display device can be simplified.

In addition, by removing the space between the backlight unit 100 and the display panel 90, it is possible to prevent a malfunction of the display device or deterioration of the image quality of the display image due to penetration of foreign matter into the space.

15 and 16 are views showing a display device according to an embodiment.

15, the display device 1 includes a display module 200, a front cover 300 and a back cover 350 surrounding the display module 200, And a driving unit cover 400 surrounding the driving unit 550 and the driving unit 550.

The front cover 300 may include a transparent front panel (not shown) that transmits light. The front panel protects the display module 200 at a predetermined interval, and the light emitted from the display module 200 So that an image displayed on the display module 200 is displayed from the outside.

Further, the front cover 300 can be made of a flat plate without the window 300a.

In this case, the front cover 300 can be made of a transparent material that transmits light, for example, an injection-molded plastic.

As such, if the front cover 300 is formed as a flat plate, the frame can be removed from the front cover 300.

The back cover 350 may be coupled with the front cover 300 to protect the display module 200.

The driving unit 550 may be disposed on one side of the back cover 350.

The driving unit 550 may include a driving control unit 550a, a main board 550b, and a power supply unit 550c.

The driving control unit 550a may be a timing controller and is a driving unit that adjusts the operation timing to each driver IC of the display module 200. The main board 550b includes a V-sync, an H- , G, and B resolution signals, and the power supply unit 550c may be a driver for applying power to the display module 200. FIG.

The driving unit 550 may be provided on the back cover 350 and may be surrounded by the driving unit cover 400.

The back cover 350 may include a plurality of holes to connect the display module 200 and the driving unit 550 and a stand 600 for supporting the display device 1.

16, the driving control unit 550a of the driving unit 550 is provided in the back cover 350, and the main board 550b and the power board 550c may be provided in the stand 600 have.

The driving unit cover 400 may cover only the driving unit 550 provided on the back cover 350.

Although the main board 550b and the power board 550c are separately formed in the embodiment, the main board 550b and the power board 550c may be formed as a single 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 (19)

A reflector;
A light source module disposed on the reflector; And
And a lens covering the light source module,
The reflector includes:
A first region having a flat plane shape and in which the light source module and the lens are disposed;
A second region having a curvature shape of the first curvature and adjacent to one side of the first region; And
A third region having a curvature shape of a second curvature and adjacent to the other side of the first region,
The lens having an upper surface and a lower surface,
At least one groove formed in the lower surface, in which at least a part of the light source module is accommodated;
A first light exit surface having a curved shape of a third curvature at one side of the upper surface and facing the second area of the reflector; And
And a second light exit surface having a curved shape of a fourth curvature at the other side of the upper surface and facing the third region of the reflector. The method according to claim 1,
Wherein the groove of the lens is at least one of a V-shaped stripe having a peak point and a side inclined, a cone, a triangular pyramid, a quadrangular pyramid, a polygonal pyramid and a hemispherical shape. 3. The method according to claim 1 or 2,
Wherein a ratio of a depth of the groove to a maximum height of the lens is 0.1 - 0.9: 1. 3. The method according to claim 1 or 2,
The side surface of the groove is a concave curved surface or a flat surface,
Wherein the upper surface of the lens is a convex curved surface. delete A reflector;
A light source module disposed on the reflector; And
And a lens covering the light source module,
The reflector includes:
A first region having a flat plane shape and in which the light source module and the lens are disposed;
A second region having a curvature shape of the first curvature and adjacent to one side of the first region; And
A third region having a curvature shape of a second curvature and adjacent to the other side of the first region,
The lens having an upper surface and a lower surface,
At least one first groove formed in the upper surface;
At least one second groove formed in the lower surface and receiving at least a part of the light source module;
A first light exit surface having a curved shape of a third curvature at one side of the upper surface and facing the second area of the reflector; And
And a second light exit surface having a curved shape of a fourth curvature at the other side of the upper surface and facing the third region of the reflector,
Wherein the first groove and the second groove are disposed to correspond to each other. The method according to claim 6,
Wherein the first and second grooves of the lens are at least one of a V-shaped stripe having a peak point and a side inclined, a cone, a triangular pyramid, a quadrangular pyramid, a polygonal pyramid and a hemispherical shape. 8. The method according to claim 6 or 7,
Wherein the first groove and the second groove are disposed to face each other with a first distance therebetween. 9. The method of claim 8,
The ratio of the depth of the first groove or the second groove to the maximum height of the lens is 0.1 - 0.5: 1,
Wherein the depth of the second groove is deeper than the depth of the first groove,
And a depth ratio of the first groove to the second groove is 0.5 - 0.99: 1. delete delete delete 8. The method according to claim 6 or 7,
The side surface of the first groove is a convex curved surface or a flat surface,
And the side surface of the second groove is concavely curved or flat. A reflector;
A plurality of light source modules disposed on the reflector; And
And a plurality of lenses corresponding to the light source modules one-to-one and covering the light source module,
The reflector includes:
A first region having a flat planar shape and in which the plurality of light source modules and the plurality of lenses are arranged;
A second region having a curvature shape of the first curvature and adjacent to one side of the first region; And
A third region having a curvature shape of a second curvature and adjacent to the other side of the first region,
Each lens having an upper surface and a lower surface,
At least one first groove formed in the upper surface;
At least one second groove formed in the lower surface, in which at least a portion of each light source module is received;
A first light emitting surface having a curved shape of a third curvature at one side of the upper surface and facing the second region of the reflector; And
And a second light exit surface having a curved shape of a fourth curvature at the other side of the upper surface and facing the third region of the reflector,
Wherein the first groove and the second groove are disposed to correspond to each other. 15. The method of claim 14,
And the adjacent lenses are disposed apart from each other at a first interval. delete delete The method according to any one of claims 1, 6 and 14,
Further comprising an optical member disposed spaced apart from the reflector at regular intervals,
And an air guide is formed in a space between the reflector and the optical member.
delete

Images