KR101948139B1 - backlight unit and illumination system using the same - Google Patents

Abstract

The present invention relates to a backlight unit and an illumination system using the same, and more particularly, to a backlight unit and an illumination system using the same, which includes a first reflector, a second reflector, at least one light source module disposed between the first and second reflectors, At least one groove is formed in a part of the second reflector, and a part of the supporter can be inserted in the second reflector groove.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit and an illumination system using the same,

An embodiment relates to a backlight unit and an illumination system using the same.

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

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

The backlight unit used in the LCD is divided into an edge type backlight unit and a direct-type backlight unit according to the position of the light source. In the edge type, a light source is disposed on the right and left sides or upper and lower sides of the LCD panel, Since the light is uniformly distributed over the surface, uniformity of light is good and the thickness of the panel can be made very thin.

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

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

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

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

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

1 is a sectional view showing a general backlight unit.

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

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

Here, the panel guide module 8 can support the display panel 9, and the top chassis 6 can be connected to the panel guide module 8 and the bottom chassis 7.

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

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

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

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

Embodiments provide a backlight unit having an air guide and a lighting system using the same, using a reflector and a supporter having a slope without a light guide plate.

An embodiment includes a first reflector, a second reflector, at least one light source module disposed between the first and second reflectors, and at least one supporter disposed in the second reflector, At least one groove is formed in a part of the second reflector, and a part of the supporter can be inserted in the second reflector groove.

Here, the inclined surface of the second reflector may include a surface inclined at an angle with respect to the surface of the first reflector, and the inclined surface may include at least one of a concave surface, a convex surface, and a flat surface It can be either.

The second reflector includes at least one of a concave surface and a convex surface and at least one flat surface. The plane of the second reflector is parallel to the first reflector. The supporter is inclined and / Or a plane.

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

Here, the supporter is disposed apart from the optical member at regular intervals, and the distance between the supporter and the optical member may be smaller than the groove depth of the second reflector.

The supporter may include a body part and a receiving part for supporting the lower surface of the body part and inserted into the groove of the second reflector.

Here, the body may have a narrower upper surface and a wider lower surface, and the width of the lower surface of the body and the width of the groove of the second reflector may be 1: 1.1-3.

Further, the body portion may include a plurality of projections or a plurality of grooves, and a plurality of adjacent projections or grooves may be arranged side by side or alternately arranged alternately.

Next, the body part and the receiving part may be formed of different materials.

Then, the height of the receiving portion and the depth of the groove of the second reflector may be different from each other.

A second gap between the side surface of the receiving portion and the second side surface of the groove of the second reflector has a first gap and a second gap between the side of the receiving portion and the first side of the groove of the second reflector, The intervals may be different.

Further, the side surface of the groove of the second reflector may be a plane perpendicular to the bottom surface of the groove, an inclined plane, and a sloped surface.

Subsequently, the supporter may be attached to the groove of the second reflector by an adhesive, wherein the supporter includes a fastening member at the bottom, at least one hole is formed in the groove of the second reflector, and the fastening member of the supporter is inserted .

The second reflector may include a support layer on which the first groove is formed, a second reflector formed on the support layer and corresponding to the first groove of the support layer, And a reflective layer in which two grooves are formed.

Here, the width of the first groove may be smaller than the width of the second groove.

Embodiments can provide a light weight, a low manufacturing cost, and a uniform brightness by making a backlight unit for an air guide by using a reflector and a supporter having an inclined surface without using a light guide plate.

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

1 is a cross-sectional view showing a typical backlight unit
2 is a cross-sectional view illustrating a backlight unit according to an embodiment
3 is a sectional view showing the position of the supporter
4A to 4C are cross-sectional views showing the groove depth of the second reflector
5 is a sectional view showing the position of the supporter disposed in the groove of the second reflector
6A to 6C are cross-sectional views showing a side surface shape of the groove of the second reflector
7A and 7B are views showing a method of attaching a supporter according to a first embodiment
8A and 8B are views showing a method of attaching a supporter according to a second embodiment
9A and 9B are cross-sectional views showing the supporter including the microprojections
10A and 10B are cross-sectional views showing a supporter including fine grooves
11A to 11D are views for explaining the arrangement relationship between the light source module and the first and second reflectors
12A to 12D are views showing a first reflector having an inclined plane
13A to 13D are views showing a first reflector having a reflection pattern
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 embodiments, it is to be understood that each layer (film), region, pattern or structure is formed "on" or "under" a substrate, each layer The terms " on " and " under " encompass both being formed "directly" or "indirectly" In addition, the criteria for above or below each layer will be described with reference to the drawings.

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

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

2, the backlight unit includes a light source module 100 including at least one light source 100a and a substrate 100b, a first reflector 200, a second reflector 300, a supporter 300, a supporter 400 and an optical member 600.

Here, the light source module 100 may be disposed between the first reflector 200 and the second reflector 300 and adjacent to the first reflector 200 or the second reflector 300.

In some cases, the light source module 100 may be spaced apart from the second reflector 300 at the same time that the light source module 100 contacts the first reflector 200, or may be disposed at a distance from the first reflector 300 200 at regular intervals.

Alternatively, the light source module 100 may be spaced apart from the first reflector 200 and the second reflector 300, or may be in contact with the first reflector 200 and the second reflector 300 at the same time .

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

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

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

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

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

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

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

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

The first reflector 200 and the second reflector 300 are spaced apart from each other by a predetermined distance so as to have an air guide in an empty space between the first reflector 200 and the second reflector 300, have.

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

In addition, a sawtooth-shaped reflection pattern may be formed on the surface of the first reflector 200 facing the light source module 100, and the surface of the reflection pattern may be flat or curved.

The reason for forming the reflection pattern on the surface of the first reflector 200 is to reflect the light generated by the light source module 100 to the central region of the second reflector 300 so as to increase the brightness in the central region of the backlight unit to be.

The second reflector 300 may have a partially inclined surface and may be formed of a metal having a high reflectance such as aluminum (Al), silver (Ag), gold (Au), titanium dioxide (TiO ₂ ) And may include a metal oxide.

The inclined surface of the second reflector 300 may be overlapped with at least one of the light source module 100 and the first reflector 200.

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

Optionally, the second reflector 300 may include at least one inclined surface and at least one flat surface, wherein the plane of the second reflector 300 is parallel to the first reflector 200, And the supporter 400 may be disposed on at least one of an inclined plane and a plane of the second reflector 300. [

In addition, the second reflector 300 includes at least two inclined surfaces having at least one inflection point, and curvatures of the first and second inclined surfaces adjacent to each other around the inflection point are different from each other, and the supporter 400 has a second reflector 300 may be disposed on at least one of the first and second inclined surfaces.

Here, one or more supporters 400 may be disposed on the second reflector 300. The supporter 400 may be disposed on an inclined surface or on a flat surface of the entire surface of the second reflector 300, It may be disposed on both the inclined surface and the flat surface.

For example, as shown in FIG. 2, the second reflector 300 may include first, second, and third regions, which are aligned with the light source module 100 and the first reflector 200 and may be a first inclined surface inclined downward with respect to the first reflector 200. [

The second region may be a second inclined surface that is adjacent to the first region and inclined upward from the first region.

Here, the first inclined surface may be a curved surface having the first curvature R1, the second inclined surface may be a curved surface having the second curvature R2, and the first and second curvatures may be different from each other.

In some cases, at least one of the first and second inclined surfaces may be a concave curved surface or a convex curved surface.

The third region may be formed in a central region adjacent to the second region, and the third region may be a plane parallel to the first reflector 200 or a curved surface having a third curvature.

Here, the third region is located in the central region of the second reflector 300. If the third region has a sharp shape, the light may concentrate and appear as a hot spot phenomenon. Therefore, It is possible to provide a uniform luminance.

If the supporter 400 is located in the third area of the second reflector 300, a groove 310 for seating the supporter 400 may be formed in the third area of the second reflector 300 .

Therefore, a part of the supporter 400 can be inserted into the groove 310 of the second reflector 300. [

When the supporter 400 is located at least one of the first and second regions of the second reflector 300, a groove 310 for seating the supporter 400 may be formed in each region.

A part of the supporter 400 may be inserted into the groove 310 of the second reflector 300, respectively.

A part of the supporter 400 is inserted into the groove 310 of the second reflector 300 because the light is reflected to the supporter 400 so that a hot spot phenomenon To prevent them from appearing.

The second reflector 300 is formed with at least one groove 310 in a region where the supporter 400 is located and a part of the supporter 400 is inserted into the groove 310 of the second reflector 300 .

The supporter 400 may include a body part 410 and a receiving part 420 to support a part of the optical member 600 to prevent deflection of the optical member 600 .

The support part 420 of the supporter 400 supports the lower surface of the body part 410 and can be inserted into the groove 310 of the second reflector 300.

The distance between the supporter 400 and the optical member 600 is greater than the depth of the groove 310 of the second reflector 300. The distance between the supporter 400 and the optical member 600 It may be small.

On the other hand, the optical member 600 may be disposed spaced apart from the second reflector 300 at regular intervals.

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

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

The optical member 600 diffuses the light emitted from the light source module 100 and may form a concave-convex pattern on the upper surface to increase the diffusion effect.

That is, the optical member 600 may be formed in several 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 100.

At this time, the concavo-convex pattern has protrusions on the surface of the optical member 600, and the protrusions are composed 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 600 is made of at least one sheet, and may optionally include a diffusion sheet, a prism sheet, a brightness enhancement sheet, and the like.

Here, the diffusion sheet diffuses the light emitted from the light source, and the prism sheet guides the diffused light to the light emitting area, and the brightness diffusion sheet strengthens the brightness.

3 is a sectional view showing the position of the supporter.

3, the supporter 400 may include a body part 410 and a receiving part 420. [

Here, the body 410 may have a narrow upper surface and a wider lower surface. For example, the body 410 may have a trapezoidal shape, a conical shape, or the like.

The width W2 of the lower surface of the body part 410 and the width W1 of the groove 310 of the second reflector 300 may be 1: 1.1-3.

The reason why the width W1 of the groove 310 of the second reflector 300 is larger than the width W2 of the lower surface of the body portion 410 is that a part of the supporter 400 is placed in the groove 310 of the second reflector 300 This is because it can be stably inserted.

The support part 420 of the supporter 400 supports the lower surface of the body part 410 and can be inserted into the groove 310 of the second reflector 300.

Here, the height h of the receiving portion 420 may be equal to the depth d of the groove 310 of the second reflector 300.

The height h of the receiving portion 420 may be different from the depth d of the groove 310 of the second reflector 300. [

For example, the height h of the receiving portion 420 may be lower than the depth d of the groove 310 of the second reflector 300.

The receiving portion 420 may be spaced from the bottom surface 310a of the groove 310 and the first side surface 310b and the second side surface 310c of the groove 310 by a predetermined distance.

The receiving portion 420 may be in contact with at least one of the bottom surface 310a of the groove 310, the first side surface 310b and the second side surface 310c of the groove 310.

The supporter 420 of the supporter 400 may be formed of the same material as the body 410 and may be formed of different materials.

For example, the body portion 410 of the supporter 400 may be a polymer resin, and the receiving portion 420 of the supporter 400 may be made of a metal material.

The spacing D between the supporter 400 and the optical member 600 may be set to a depth d of the groove 310 of the second reflector 300 Lt; / RTI >

The reason why the supporter 400 is disposed close to the optical member 600 is that the supporter 400 supports the optical member 600 when the optical member 600 is lowered, It is possible to prevent a deflection phenomenon.

4A to 4C are cross-sectional views showing the groove depth of the second reflector.

4A to 4C, the supporter 400 may include a body part 410 and a receiving part 420. The receiving part 420 of the supporter 400 may include a body 410 and a receiving part 420, And can be inserted into the groove 310 of the second reflector 300. [

Here, the height h of the receiving portion 420 may be equal to the depth d of the groove 310 of the second reflector 300, as shown in FIG. 4A.

The reason why the receiving portion 420 of the supporter 400 is inserted into the groove 310 of the second reflector 300 is that the light is reflected by the receiving portion 420 of the supporter 400, To prevent hot spots from concentrating.

That is, when the support portion 420 of the supporter 400 is exposed above the surface of the second reflector 300, light is reflected by the support portion 420 of the supporter 400, A hot spot phenomenon may occur.

Therefore, in order to reduce such a hot spot phenomenon, the support portion 420 of the supporter 400 is inserted into the groove 310 of the second reflector 300.

In some cases, the height h of the receiving portion 420 may be smaller than the depth d of the groove 310 of the second reflector 300, as shown in FIG. 4B.

The distance g between the height h of the receiving portion 420 and the depth d of the groove 310 of the second reflector 300 is 0.1 to 0.5 times the depth d of the groove 310 of the second reflector 300 have.

That is, the height h of the receiving part 420 and the depth d of the groove 310 of the second reflector 300 may be 1: 2-10.

The reason for this is that if the height h of the support part 420 is too low, the height of the body part 410 of the supporter 400 must be higher, and the structure of the supporter 400 is unstable and can easily collapse to be.

Next, as shown in FIG. 4C, the height h of the receiving portion 420 may be larger than the depth d of the groove 310 of the second reflector 300.

The distance g between the height h of the support part 420 and the depth d of the groove 310 of the second reflector 300 is 0.1-1 times the depth d of the groove 310 of the second reflector 300 have.

That is, the height h of the receiving part 420 and the depth d of the groove 310 of the second reflector 300 may be 1: 0.5-0.9.

This is because if the height h of the support portion 420 is too high, the overall brightness may become uneven due to the hot spot of light.

5 is a sectional view showing the position of the supporter disposed in the groove of the second reflector.

5, the supporter 400 may include a body portion 410 and a receiving portion 420. The receiving portion 420 of the supporter 400 may include a lower portion of the body portion 410 And can be inserted into the groove 310 of the second reflector 300.

The width W3 of the receiving portion 420 of the supporter 400 may be smaller than the width W1 of the groove 310 of the second reflector 300. [

The receiving portion 420 is attached to the bottom surface 310a of the groove 310 and may be spaced apart from at least one of the first side surface 310b and the second side surface 310c of the groove 310 have.

The receiving portion 420 may be in contact with at least one of the bottom surface 310a of the groove 310, the first side surface 310b and the second side surface 310c of the groove 310.

For example, between the side surface of the receiving portion 420 and the first side surface 310b of the groove 310 of the second reflector 300 has a first distance d1, and the side surface of the receiving portion 420 and the side surface of the second reflector 300, The first gap d1 and the second gap d2 may be different from each other between the second side surfaces 310c of the grooves 310 of the substrate 300. The first gap d1 may be different from the second gap d2.

6A to 6C are cross-sectional views showing a side view of the groove of the second reflector.

6A to 6C, the side surfaces 310b and 310c of the groove 310 of the second reflector 300 are formed in a plane perpendicular to the bottom surface 310a of the groove 310, And may be any one of inclined curved surfaces.

6A shows that the first side 310b of the groove 310 of the second reflector 300 may be a plane perpendicular to the bottom surface 310a of the groove 310 and the groove 310 of the second reflector 300 310 may also be a plane perpendicular to the bottom surface 310a of the groove 310. In this case,

The first angle? 1 between the first side surface 310b of the groove 310 and the bottom surface 310a of the groove 310 is equal to the angle between the second side surface 310c of the groove 310 and the bottom surface 310a of the groove 310. [ May be the same as the second angle &thetas;

6B illustrates that the first side 310b of the groove 310 of the second reflector 300 may be an inclined surface perpendicular to the bottom surface 310a of the groove 310 and the groove 310 of the second reflector 300 310 may also be an inclined surface perpendicular to the bottom surface 310a of the groove 310. In this case,

The first angle? 1 between the first side surface 310b of the groove 310 and the bottom surface 310a of the groove 310 is equal to the angle between the second side surface 310c of the groove 310 and the bottom surface 310a of the groove 310. [ May be the same as the second angle &thetas; 2 between the first and second ends 310a, but they may be different from each other in some cases.

The first side 310b of the groove 310 of the second reflector 300 may be a concave curved surface with respect to the bottom surface 310a of the groove 310 and the groove 310 of the second reflector 300 May also be a curved surface concave with respect to the bottom surface 310a of the groove 310.

Here, the first curvature R1 of the first side surface 310b of the groove 310 may be the same as the second curvature R2 of the second side surface 310c of the groove 310, but may be different from each other in some cases.

7A and 7B show a first embodiment showing a method of attaching a supporter.

As shown in FIG. 7A, the second reflector 300 may include a support layer 300a and a reflection layer 300b.

Here, the support layer 300a may be a polymer resin, and the reflection layer 300b may include at least one of a metal or a metal oxide. For example, aluminum (Al), silver (Ag), gold Or a metal or metal oxide having a high reflectance such as titanium dioxide (TiO ₂ ).

In this case, the reflection layer 300b may be formed by depositing or coating a metal or a metal oxide on the support layer 300a, which is a polymer resin, or may be formed by printing metal ink.

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

The reflective layer 300b may be formed in the form of a film or a sheet, and may be adhered to the support layer 300a, which is a polymer resin, with an adhesive.

The second reflector 300 including the supporting layer 300a and the reflecting layer 300b may form a first groove 310a by removing a part of the reflecting layer 300b to expose the supporting layer 300a .

An adhesive 430 is formed in the first groove 310a and the supporter 400 including the body 410 and the receiver 420 is attached to the adhesive 430 in the first groove 310a, .

7B, the second reflector 300 including the support layer 300a and the reflection layer 300b may be formed by removing a part of the reflection layer 300b to expose the support layer 300a, 310a can be formed.

The second reflector 300 may further form a second groove 310b corresponding to the first groove 310a by removing a part of the supporting layer 300a exposed in the first groove 310a .

Here, the width W6 of the first groove 310a may be larger than the width W5 of the second groove 310b.

The depth d of the second groove 310b may be smaller than the height h of the receiving portion 420 of the supporter 400.

The adhesive 430 is formed in the fabricated second groove 310b and the supporter 400 including the body 410 and the receiver 420 is bonded to the adhesive 430 in the second groove 310b ). ≪ / RTI >

8A and 8B show a second embodiment showing a method of attaching a supporter.

As shown in FIG. 8A, the second reflector 300 may include a support layer 300a and a reflection layer 300b.

The second reflector 300 may form a first groove 310a by removing a part of the reflective layer 300b to expose the supporting layer 300a.

At least one hole 320 for inserting the fastening member 440 of the supporter 400 may be formed in the first groove 310a.

The fastening member 440 for fastening the second reflector 300 is formed on the lower portion of the supporter 400 of the supporter 400 and the fastening member 440 of the supporter 400 is fastened to the second reflector 300, The second reflector 300 can be inserted into the hole 320 formed in the first groove 310a of the second reflector 300. [

8B, the second reflector 300 including the supporting layer 300a and the reflective layer 300b may be formed by removing a part of the reflective layer 300b to expose the supporting layer 300a, 310a can be formed.

The second reflector 300 may further form a second groove 310b corresponding to the first groove 310a by removing a part of the supporting layer 300a exposed in the first groove 310a .

Here, the width W6 of the first groove 310a may be larger than the width W5 of the second groove 310b.

The depth d of the second groove 310b may be smaller than the height h of the receiving portion 420 of the supporter 400.

Next, at least one hole 320 for inserting the fastening member 440 of the supporter 400 may be formed in the second groove 310b.

The fastening member 440 for fastening the second reflector 300 is formed on the lower portion of the supporter 400 of the supporter 400 and the fastening member 440 of the supporter 400 is fastened to the second reflector 300, The second reflector 300 is inserted into the hole 320 formed in the second groove 310b of the second reflector 300. [

9A and 9B are cross-sectional views showing a supporter including fine protrusions.

9A, the supporter 400 may include a body part 410 and a receiving part 420, wherein a plurality of fine protrusions 412 are formed on the surface of the body part 410 of the supporter 400 .

Here, the plurality of microprojections 412 may be disposed on the entire surface of the body 410, and the microprotrusions 412 adjacent to each other may be arranged at regular intervals, and may be arranged in a line.

9B, the plurality of microprojections 412 may be disposed on the entire surface of the body portion 410. The microprotrusions 412 adjacent to each other may be spaced apart from each other, Alternately arranged alternately.

Here, the fine protrusions 412 are reflectors coated with a reflective material, which can reflect and diffuse light, thereby providing uniform brightness.

10A and 10B are sectional views showing supporters including fine grooves.

10A, the supporter 400 may include a body part 410 and a receiving part 420, and a plurality of fine grooves 414 are formed on the surface of the body part 410 of the supporter 400 .

Here, the plurality of fine grooves 414 may be disposed on the entire surface of the body portion 410. The adjacent fine grooves 414 may be arranged at regular intervals, and may be arranged side by side.

10B, a plurality of fine grooves 414 may be disposed on the entire surface of the body portion 410. The adjacent fine grooves 414 may be disposed at regular intervals, Alternately arranged alternately.

Here, the fine grooves 412 are reflectors coated with a reflective material, and by reflecting and diffusing light, they can provide uniform brightness.

11A to 11D are views for explaining the arrangement relationship between the light source module and the first and second reflectors.

11A is a view showing a light source module 100 disposed at a predetermined distance from a first reflector 200 and a second reflector 300 and FIG. 11B is a view showing a first reflector 200 and a second reflector 300 11C is a view showing a light source module 100 that is in contact with the first reflector 200 and is spaced apart from the second reflector 300 at a predetermined interval, and FIG. 11D is a view showing the light source module 100 in contact with the first reflector 200. FIG. And a light source module 100 disposed at a predetermined distance from the first reflector 200 and contacting the second reflector 300. FIG.

The light source module 100 may be spaced apart from the first reflector 200 by a first distance d1 and from the second reflector 300 by a second distance d2, as shown in FIG. 11A.

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

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

This is because, if the first distance d1 is larger than the second distance d2, a hot spot phenomenon may occur.

Then, as shown in FIG. 11B, the light source module 100 may be in contact with the first reflector 200 and the second reflector 300.

Here, the light source module 100 can prevent hot spots by contacting the first and second reflectors 200 and 300, and can transmit light to a region far from the light source module 100, and the thickness of the entire backlight unit .

11C, the light source module 100 may contact the first reflector 200 and be spaced apart from the second reflector 300 by a distance d.

Here, the light source module 100 can prevent hot spot by contacting the first reflector 200, and can transmit light to a region far from the light source module 100.

Next, as shown in FIG. 11D, the light source module 100 may contact the second reflector 300 and be spaced apart from the first reflector 200 by a distance d.

Figs. 12A to 12D are views showing a first reflector having an inclined plane, wherein Fig. 12A shows a case where the inclined plane is a plane, and Figs. 12B, 12C and 12D show a case where the inclined plane is a curved face.

12A to 12D, one surface of the first reflector 200 facing the second reflector 300 may have an inclined surface inclined at a predetermined angle with respect to the other surface of the first reflector 200 have.

Here, the inclination angle? Of the inclined plane may be inclined at an angle of 1 to 85 degrees with respect to a horizontal plane parallel to the other surface of the first reflector 200.

Therefore, the thickness of the first reflector 200 may gradually decrease as the distance from the light source module 100 increases, or may gradually increase.

That is, the thickness t1 of the first reflector 200 adjacent to the light source module 100 may be different from the thickness t2 of the area farther from the light source module 100. As shown in FIGS. 12A and 12B, May be greater than the thickness t2 of the region distant from the light source module 100. In this case,

In some cases, the thickness t1 of the region adjacent to the light source module 100 may be smaller than the thickness t2 of the region far from the light source module 100, as shown in Figs. 12C and 12D.

Further, as shown in FIG. 12D, the first reflector 200 may include both the inclined plane and the plane.

That is, in the first reflector 200, an area adjacent to the light source module 100 may have an inclined surface, and an area far from the light source module 100 may have a plane.

Here, the length L1 of the inclined plane may be the same as the length L2 of the plane, or may be different from each other in some cases.

A predetermined reflection pattern may be formed on the surface of the first reflector 200.

13A to 13D are views showing a first reflector having a reflection pattern.

13A and 13C show that the reflection pattern 220 is a sawtooth shape and the surface of the reflection pattern 220 is a curved surface. .

Here, FIG. 13B shows a concave curved surface of the reflective pattern 220, and FIG. 13C shows a convex curved surface of the reflective pattern 220.

13D, the size of the reflection pattern 220 may gradually increase from the end of the first reflector 200 to the open area.

The reason why the reflection pattern 220 is formed on the first reflector 200 in this way is not only reflection of the light but also diffusion effect that uniformly spreads the light.

Accordingly, the reflective pattern 220 can be manufactured in various sizes in the corresponding region according to the entire luminance distribution of the backlight.

As described above, according to the embodiments, since the air guide backlight unit is manufactured by using the reflector and the supporter having the inclined surface without using the light guide plate, it is possible to provide the air guide backlight unit which is light in weight, low in manufacturing cost, .

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

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

As shown in FIG. 14, the display module 20 may include a display panel 800 and a backlight unit 700.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Another embodiment can be implemented with a first and a second reflector, a supporter, a display device including a light source module, an indicator, and a lighting system described in the above embodiments. For example, . ≪ / RTI >

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

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

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100: light source module 200: first reflector
300: Second reflector 400: Supporter
410: body part 420:

Claims (23)

A first reflector;
A second reflector;
At least one light source module disposed between the first and second reflectors; And,
And at least one supporter disposed in the second reflector,
At least one groove is formed in a part of the second reflector, a part of the supporter is inserted in the second reflector groove,
Wherein the second reflector includes at least one of a concave surface and a convex surface and at least one flat surface, the plane of the second reflector is a plane parallel to the first reflector, Which is disposed on at least one of an oblique surface and a flat surface,
Wherein the second reflector
A support layer, and a reflective layer formed on the support layer,
Wherein the groove formed in the second reflector
A first groove formed in the support layer and a second groove formed in the reflection layer in correspondence with the first groove in the support layer,
The supporter includes:
And a support portion for supporting the body portion and the lower surface of the body portion,
The height of the receiving portion of the supporter,
The depth of the groove of the second reflector including the first groove and the second groove is larger than the depth of the first groove formed in the support layer,
Further comprising an optical member disposed at a predetermined interval from the second reflector, wherein an air guide is formed in a space between the second reflector and the optical member. delete The optical information recording medium according to claim 1, wherein the supporter is disposed at a predetermined distance from the optical member,
Wherein an interval between the supporter and the optical member is smaller than a groove depth of the second reflector. delete [2] The apparatus of claim 1, wherein the body portion has a narrow upper surface and a wider lower surface,
Wherein a width of the lower surface of the body portion and a width of the groove of the second reflector are 1: 1.1-3. The illumination system of claim 1, wherein the body comprises a plurality of protrusions or a plurality of grooves. 7. The illumination system of claim 6, wherein the plurality of projections or grooves adjacent to each other are arranged side by side. 7. The illumination system according to claim 6, wherein the plurality of projections or grooves adjacent to each other are arranged alternately staggered. The lighting system according to claim 1, wherein the body part and the receiving part are formed of different materials. The reflector according to claim 1, wherein a distance between the side surface of the receiving portion and the first side surface of the groove of the second reflector is a first distance, and a second distance between the side surface of the receiving portion and the second side surface of the groove of the second reflector And wherein the first spacing and the second spacing are different. delete The lighting system according to claim 1, wherein the supporter is attached to the groove of the second reflector by an adhesive. The lighting system according to claim 1, wherein the supporter includes a fastening member at a lower portion, at least one hole is formed in a groove of the second reflector, and a fastening member of the supporter is inserted and fastened in the hole. delete The illumination system of claim 1, wherein the width of the first groove of the support layer is smaller than the width of the second groove of the reflective layer. delete delete delete delete delete delete delete delete

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