KR101933999B1 - Illumination system - Google Patents

Abstract

The present invention relates to a backlight unit and an illumination system using the same. The backlight unit includes a first reflector, a second reflector, a light source module disposed between the first reflector and the second reflector, and a light source module disposed between the first reflector and the second reflector, And a second horizontal line connecting a first horizontal line connecting a point of the end portion of the optical member and a second horizontal line connecting a point of an end portion of the first reflector, The ratio of the distance value to the second distance value between the first horizontal line connecting a point of the end portion of the optical member and the third horizontal line connecting a point of the end portion of the second reflector is about 1 : 1.5 - 4 days.

Description

[0001] Illumination system [0002]

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.

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

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

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

Embodiments provide a backlight unit and a lighting system using the same, which can reduce a bezel and a thickness by using an effective gap between a reflector and an optical member.

Further, the embodiment is intended to provide a backlight unit having an air guide and a lighting system using the same, without using a light guide plate, using a reflector having an inclined surface.

According to an embodiment of the present invention, there is provided an optical module comprising a first reflector, a second reflector, a light source module disposed between the first reflector and the second reflector, and an optical member disposed at a certain distance from the first reflector and the second reflector. A first distance value between a first horizontal line connecting a point of an end portion of the optical member and a second horizontal line connecting a point of an end portion of the first reflector, The ratio of the second distance value between the first horizontal line connecting a point of the end portion and the third horizontal line connecting a point of the end portion of the second reflector may be about 1: 1.5-4.

Here, the upper surface of the first reflector and the lower surface of the optical member may be opposed to each other, may be parallel to each other, and the upper surface of the second reflector and the lower surface of the optical member may be opposed to each other and may not be parallel to each other.

Further, the lower surface of the first reflector and the upper surface of the second reflector are opposed to each other and may not be parallel to each other.

The second reflector includes a first inclined surface adjacent to the light source module and inclined upward, a second inclined surface adjacent to the first inclined surface, inclined downward from the first inclined surface, and a second inclined surface adjacent to the second inclined surface And a third inclined surface inclined upward from the second inclined surface.

Here, the first inclined surface of the second reflector is closer to the optical member and closer to the second inclined surface of the second reflector, and further away from the second inclined surface of the second reflector, away from the optical member.

Then, the first inclined surface of the second reflector includes a fourth horizontal line connecting the boundary of the second reflector and the second inclined surface of the second reflector, and a point of the end portion of the second reflector The third distance value between the connecting third horizontal lines may be smaller than the first distance value between the first horizontal line connecting one point of the end of the optical member and the second horizontal line connecting one point of the end of the first reflector.

Here, the ratio of the first distance value to the third distance value may be about 1.1 - 2: 1.

The first inclined surface of the second reflector may include a boundary line that contacts the second inclined surface of the second reflector and may include a fourth horizontal line connecting a point of the boundary line and a fifth horizontal line connecting the center axis of the light source of the light source module The fourth distance value may be greater than a fifth distance value between a second horizontal line connecting a point on the end of the first reflector and a fifth horizontal line connecting the center axis of the light source of the light source module.

Here, the ratio of the fourth distance value to the fifth distance value may be about 1.1 - 6: 1.

The first inclined surface of the second reflector includes a boundary line that contacts the second inclined surface of the second reflector and includes a first vertical line connecting a point on the boundary line and a point on the end portion of the second reflector The sixth distance value between the adjacent second vertical lines is larger than the seventh distance value between the third vertical line connecting one point of one end of the first reflector and the fourth vertical line connecting one point of the other end of the first reflector have.

Here, the ratio of the sixth distance value to the seventh distance value may be about 1.1 - 3: 1.

Next, the first inclined surface of the second reflector includes a boundary line contacting the second inclined surface of the second reflector, and a third vertical line connecting one point of one end of the first reflector and one point of the other end of the first reflector The seventh distance value between the connecting fourth vertical lines may be greater than an eighth distance value between a first vertical line connecting a point on the boundary and a fourth vertical line connecting a point on the other end of the first reflector.

Here, the ratio of the seventh distance value to the eighth distance value may be about 1.1 - 2: 1.

Next, the first inclined surface of the second reflector includes a boundary line that contacts the second inclined surface of the second reflector, and the angle between the fourth horizontal line connecting one point of the boundary line and the first inclined surface of the second reflector is about 10 to 80 degrees.

Further, a part of the first inclined surface of the second reflector may overlap with at least one of the first reflector and the light source module.

Here, the first inclined surface of the second reflector may be any one of a flat surface, a concave surface, and a convex surface.

The second inclined surface of the second reflector may be a curved surface having a first curvature radius, and the third inclined surface of the second reflector may be a curved surface having a second curvature radius.

Here, the first radius of curvature and the second radius of curvature may be different from each other.

Next, the first inclined plane of the second reflector is a diffusely reflecting region that diffusely reflects light, and the second inclined plane of the second reflector may be a regularly reflective region regularly reflecting the light.

The third inclined surface of the second reflector may be at least one of a diffuse reflection region that diffusely reflects light and a specular reflection region that regularly reflects light.

Further, the second reflector may further include a fourth inclined surface adjacent to the third inclined surface.

Here, the fourth inclined surface may be any one of a flat plane, a concave curved surface, and a convex curved surface.

And, the fourth inclined surface may be provided with at least one supporter.

Next, another embodiment of the present invention is directed to a light source module comprising a first reflector, a second reflector, a light source module disposed between the first reflector and the second reflector, and an optical element disposed between the first reflector and the second reflector, Wherein a separation member is disposed between the optical member and the first reflector, the upper surface of the spacing member is in contact with the optical member, the lower surface of the spacing member is in contact with the first reflector and the second reflector, And the distance between the top surface and the bottom surface of the spacer member may be about 4-12 mm.

Here, the upper surface of the spacer member may have a larger area than the lower surface of the spacer member.

And, the side surface of the spacing member may be an inclined surface, and the angle between the lower surface of the spacing member and the side surface of the spacing member may be an obtuse angle.

Here, the separation member may be an empty separation member having a hollow shape.

The spacing member may include a body portion connected to the spacing member, and the light source module may be attached to the body portion of the spacing member.

Next, a plurality of heat dissipating protrusions may be disposed on a part of the spacing member.

The second reflector includes a first inclined surface adjacent to the light source module and inclined upward, a second inclined surface adjacent to the first inclined surface and inclined downward from the first inclined surface, Some may overlap the spacing member.

Next, the area of the first inclined surface of the second reflector may be wider than the area of the lower surface of the spacing member or the area of the upper surface of the spacing member.

According to another aspect of the present invention, there is provided a light source module including a first reflector, a second reflector, a light source module disposed between the first reflector and the second reflector, and a light source module disposed between the first reflector and the second reflector And a second reflector includes a central region facing the optical member and a peripheral region disposed on both sides of the central region and adjacent to the first reflector and the light source module, The distance between the vertical line connecting one point of the one end of the inclined plane and the vertical line connecting one point of the other end of the inclined plane is the first May be larger than a distance between a vertical line connecting one point of one end of the reflector and a vertical line connecting one point of the other end of the first reflector.

Further, in the embodiments, an air guide may be formed in the space between the second reflector and the optical member.

Embodiments can reduce the bezel and thickness of the backlight unit by utilizing an effective gap between the reflector and the optical member.

In addition, in the embodiment, a reflector having an inclined surface is used to manufacture a structure having an air guide without a light guide plate, so that the weight is light, the manufacturing cost is low, and uniform brightness can be provided.

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 sectional view for explaining a backlight unit of a two-edge type according to the embodiment
3 is a sectional view showing the arrangement relationship between the optical member and the first and second reflectors according to the first embodiment
4A to 4C are cross-sectional views showing the arrangement relationship between the optical member and the first and second reflectors according to the second embodiment
5A to 5C are cross-sectional views showing the arrangement relationship of the optical member and the first and second reflectors according to the third embodiment
6A to 6C are sectional views showing the arrangement relationship of the optical member and the first and second reflectors according to the fourth embodiment
7A to 7C are cross-sectional views showing the arrangement relationship of the optical member and the first and second reflectors according to the fifth embodiment
8 is a sectional view showing the arrangement relationship between the optical member and the first and second reflectors according to the sixth embodiment
9A to 9C are cross-sectional views showing the arrangement of the second reflector
10A to 10C are cross-sectional views showing a first inclined plane of the second reflector
11 is a sectional view showing the second and third inclined surfaces of the second reflector
12 is a sectional view showing the second, third and fourth inclined surfaces of the second reflector
13A to 13C are cross-sectional views showing the fourth inclined plane of the second reflector
Fig. 14 is a cross-sectional view showing the arrangement of the spacing member of Fig. 2
15A and 15B are cross-sectional views showing side surfaces of the spacing member
16A and 16B are cross-sectional views showing the shapes of the spacing members
17A and 17B are cross-sectional views showing the heat dissipation protrusions of the spacing member
18 is a cross-sectional view showing the body portion of the spacing member
19A to 19D are views for explaining the arrangement relationship between the light source module and the first and second reflectors
20A to 20D are views showing a first reflector having an inclined plane
Figs. 21A to 21D are views showing a first reflector having a reflection pattern
22 is a perspective view showing the optical member
23 is a view showing a display module having a backlight unit according to an embodiment
24 and 25 are views showing a display device according to the 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 of a two-edge type according to an embodiment.

2, the backlight unit may include a light source module 100, first and second reflectors 200 and 300, and an optical member 600.

Further, the backlight unit may further include a further separation member.

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

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. The second reflector 300 may have an inclined surface, have.

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, It can be a parallel side.

Also, 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 may be different from each other.

For example, the second reflector 300 includes a central region facing the optical member 600 and a peripheral region disposed on both sides of the central region and adjacent to the first reflector 200 and the light source module 100 .

Here, the peripheral region of the second reflector 300 may be an inclined surface.

That is, the inclined surface of the peripheral region of the second reflector 300 may be an inclined surface which is closer to the optical member 600 as the central region of the second reflector 300 is adjacent thereto.

The central region of the second reflector 300 can be divided into a first region and a second region around the inflection point P, and the first region of the second reflector 300 is an inclined surface inclined downward And the second area of the second reflector 300 may be an inclined surface inclined upward.

Here, the inclined surface of the first region of the second reflector 300 has a first radius of curvature, the inclined surface of the second region of the second reflector 300 may have a second radius of curvature, 2 Curvature radii may be different.

In some cases, the central region of the second reflector 300 may have a plurality of inflection points, and the radius of curvature of adjacent slopes may be different from each other around each inflection point P.

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.

As described above, the optical member 600 can be disposed at a predetermined interval from the first reflector 200 and the second reflector 300, and the optical member 600 can be disposed at a predetermined distance from the end portion of the optical member 600 The first distance D1 between the first horizontal line H1 connecting the points and the second horizontal line H2 connecting one point of the end portion of the first reflector 200 and the first distance D1 between the first horizontal line H1 and the end portion of the optical member 600 The ratio of the second distance value D2 between the first horizontal line H1 connecting one point and the third horizontal line H3 connecting one point of the end portion of the second reflector 300 may be about 1: 1.5-4.

The upper surface of the first reflector 200 and the lower surface of the optical member 600 may be parallel to each other and the upper surface of the second reflector 300 and the lower surface of the optical member 600 They may face each other and may not be parallel to each other.

The lower surface of the first reflector 200 and the upper surface of the second reflector 300 may face each other and may not be parallel to each other.

In addition, a separation member 400 may be further disposed between the optical member 600 and the first reflector 200.

The upper surface 400a of the spacing member 400 is in contact with the optical member 600 and the lower surface 400b of the spacing member 400 is in contact with the first reflector 200. [

At this time, the distance between the upper surface 400a and the lower surface 400b of the spacing member 400 may be about 4-12 mm.

The upper surface 400a of the spacing member 400 may have a larger area than the lower surface 400b of the spacing member 400.

The angle between the lower surface 400b of the spacer member 400 and the side surface of the spacer member 400 may be an obtuse angle.

Optionally, the spacing member 400 may be an empty separation member having a hollow shape.

The spacing member 400 may include a body portion connected to the spacing member 400. The light source module 100 may be attached to the body portion of the spacing member 400. [

In addition, a plurality of heat dissipating protrusions may be disposed on a part of the spacing member 400.

Thus, the embodiment can reduce the bezel area of the backlight unit by providing an effective gap between the first reflector 200 and the optical member 600.

In addition, in the embodiment, the peripheral region of the second reflector 300 adjacent to the light source module 100 is formed as an inclined surface inclined upward, thereby reducing the thickness of the backlight unit and providing uniform brightness.

In addition, in the embodiment, a backlight unit having an air guide can be manufactured without using a light guide plate using a reflector having an inclined surface, so that the weight of the backlight unit can be reduced, and manufacturing cost can be reduced.

3 is a cross-sectional view showing the arrangement relationship between the optical member and the first and second reflectors according to the first embodiment.

3, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, and the optical member 600 includes the first reflector 200 and the second reflector 300, (Not shown).

The first distance value between the first horizontal line H1 connecting one point of the end portion of the optical member 600 and the second horizontal line H2 connecting one point of the end portion of the first reflector 200 A second distance between the first horizontal line H1 connecting one point of the end portion of the optical member 600 and the third horizontal line H3 connecting one point of the end portion of the second reflector 300, The ratio of the value D2 may be about 1: 1.5-4.

The end of the optical member 600 refers to the edge region of the upper surface 600a of the optical member 600, the edge region of the lower surface 600b of the optical member 600, And a side region between the surface 600a and the lower surface 600b.

The end of the first reflector 200 corresponds to the edge region of the upper surface 200a of the first reflector 200, the edge region of the lower surface 200b of the first reflector 200, 200 may be any one of a side surface region between the upper surface 200a and the lower surface 200b.

The end of the second reflector 300 corresponds to the edge area of the upper surface 300a of the second reflector 300, the edge area of the lower surface 300b of the second reflector 300, 300 may be any one of a side surface region between the upper surface 300a and the lower surface 300b.

A first distance between a first horizontal line H1 connecting a point on the end portion of the optical member 600 and a second horizontal line H2 connecting a point on the end portion of the first reflector 200, The value D1 may be about 4-12 mm.

The upper surface of the first reflector 200 and the lower surface of the optical member 600 may be parallel to each other and the upper surface of the second reflector 300 and the lower surface of the optical member 600 They may face each other and may not be parallel to each other.

The lower surface of the first reflector 200 and the upper surface of the second reflector 300 may face each other and may not be parallel to each other.

Next, the second reflector 300 may include a first inclined surface, a second inclined surface, and a third inclined surface.

Here, the first inclined surface of the second reflector 300 may be inclined toward the upper direction adjacent to the light source module 100, and the second inclined surface of the second reflector 300 may be inclined toward the upper side of the second reflector 300 And may be inclined downward from the first inclined surface of the second reflector 300. [

The third inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 and may be inclined upward from the second inclined surface of the second reflector 300. [

At this time, the first inclined surface of the second reflector 300 is closer to the optical member 600 and further away from the second inclined surface of the second reflector 300, as the second inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 The distance from the optical member 600 can be increased.

For example, the first inclined surface of the second reflector 300 may be a flat surface, and the second inclined surface and the third inclined surface of the second reflector 300 may be concave curved surfaces, Can be disposed on both sides.

4A to 4C are cross-sectional views showing the arrangement relationship between the optical member and the first and second reflectors according to the second embodiment.

4A to 4C, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, and the optical member 600 includes the first reflector 200 and the second reflector 300, And may be disposed at a predetermined interval from the second reflector 300.

Here, the second reflector 300 may include a first inclined surface, a second inclined surface, and a third inclined surface.

At this time, the first inclined surface of the second reflector 300 may be inclined toward the upper direction adjacent to the light source module 100, and the second inclined surface of the second reflector 300 may be inclined toward the upper side of the second reflector 300 And may be inclined downward from the first inclined surface of the second reflector 300. [

The third inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 and may be inclined upward from the second inclined surface of the second reflector 300. [

At this time, the first inclined surface of the second reflector 300 is closer to the optical member 600 and further away from the second inclined surface of the second reflector 300, as the second inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 The distance from the optical member 600 can be increased.

For example, the first inclined surface of the second reflector 300 may be a flat surface, and the second inclined surface and the third inclined surface of the second reflector 300 may be concave curved surfaces, Can be disposed on both sides.

The first inclined surface of the second reflector 300 may include a boundary line that contacts the second inclined surface of the second reflector 300. [

Here, as shown in FIG. 4A, the third distance D3 between the fourth horizontal line H4 connecting one point of the boundary line and the third horizontal line H3 connecting one point of the end portion of the second reflector 300, May be smaller than the first distance value D1 between the first horizontal line H1 connecting one point of the end of the member 600 and the second horizontal line H2 connecting one point of the end of the first reflector 200. [

At this time, the ratio of the first distance value D1 to the third distance value D3 may be about 1.1 - 2: 1.

Here, the end of the optical member 600 refers to the edge region of the upper surface 600a of the optical member 600, the edge region of the lower surface 600b of the optical member 600, And a side region between the surface 600a and the lower surface 600b.

The end of the first reflector 200 corresponds to the edge region of the upper surface 200a of the first reflector 200, the edge region of the lower surface 200b of the first reflector 200, 200 may be any one of a side surface region between the upper surface 200a and the lower surface 200b.

The end of the second reflector 300 corresponds to the edge area of the upper surface 300a of the second reflector 300, the edge area of the lower surface 300b of the second reflector 300, 300 may be any one of a side surface region between the upper surface 300a and the lower surface 300b.

A first distance between a first horizontal line H1 connecting a point on the end portion of the optical member 600 and a second horizontal line H2 connecting a point on the end portion of the first reflector 200, The value D1 may be about 4-12 mm.

4B, the third distance D3 between the fourth horizontal line H4 connecting one point of the boundary line and the third horizontal line H3 connecting one point of the end portion of the second reflector 300 is May be equal to the first distance value D1 between the first horizontal line H1 connecting one point of the end of the optical member 600 and the second horizontal line H2 connecting one point of the end of the first reflector 200. [

As another example, as shown in FIG. 4C, a third distance value D3 between a fourth horizontal line H4 connecting a point on the boundary line and a third horizontal line H3 connecting a point on the end portion of the second reflector 300 May be larger than the first distance value D1 between the first horizontal line H1 connecting one point of the end of the optical member 600 and the second horizontal line H2 connecting one point of the end of the first reflector 200. [

At this time, the ratio of the first distance value D1 and the third distance value D3 may be about 1: 1.1-2.

The upper surface of the first reflector 200 and the lower surface of the optical member 600 can be parallel to each other and the upper surface of the second reflector 300 and the lower surface of the optical member 600 They may face each other and may not be parallel to each other.

The lower surface of the first reflector 200 and the upper surface of the second reflector 300 may face each other and may not be parallel to each other.

5A to 5C are cross-sectional views showing the arrangement relationship between the optical member and the first and second reflectors according to the third embodiment.

5A to 5C, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, the optical member 600 includes the first reflector 200 and the second reflector 300, And may be disposed at a predetermined interval from the second reflector 300.

Here, the second reflector 300 may include a first inclined surface, a second inclined surface, and a third inclined surface.

At this time, the first inclined surface of the second reflector 300 may be inclined toward the upper direction adjacent to the light source module 100, and the second inclined surface of the second reflector 300 may be inclined toward the upper side of the second reflector 300 And may be inclined downward from the first inclined surface of the second reflector 300. [

The third inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 and may be inclined upward from the second inclined surface of the second reflector 300. [

At this time, the first inclined surface of the second reflector 300 is closer to the optical member 600 and further away from the second inclined surface of the second reflector 300, as the second inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 The distance from the optical member 600 can be increased.

For example, the first inclined surface of the second reflector 300 may be a flat surface, and the second inclined surface and the third inclined surface of the second reflector 300 may be concave curved surfaces, Can be disposed on both sides.

The first inclined surface of the second reflector 300 may include a boundary line that contacts the second inclined surface of the second reflector 300. [

5A, the fourth distance D4 between the fourth horizontal line H4 connecting a point on the boundary line and the fifth horizontal line H5 connecting the center axis of the light source 100a of the light source module 100, 200 between the second horizontal line H2 and the fifth horizontal line H5 connecting the center axis of the light source 100a of the light source module 100. [

At this time, the ratio of the fourth distance value D4 and the fifth distance value D5 may be about 1.1 - 6: 1.

The termination of the first reflector 200 refers to the edge area of the upper surface 200a of the first reflector 200, the edge area of the lower surface 200b of the first reflector 200, 200 may be any one of a side surface region between the upper surface 200a and the lower surface 200b.

5B, the fourth distance value D4 between the fourth horizontal line H4 connecting a point on the boundary line and the fifth horizontal line H5 connecting the center axis of the light source 100a of the light source module 100, May be equal to a fifth distance value D5 between a second horizontal line H2 connecting a point on the end of the reflector 200 and a fifth horizontal line H5 connecting the center axis of the light source 100a of the light source module 100. [

5C, the fourth distance value D4 between the fourth horizontal line H4 connecting a point on the boundary line and the fifth horizontal line H5 connecting the center axis of the light source 100a of the light source module 100, 1 reflector 200 may be smaller than a fifth distance D5 between a second horizontal line H2 connecting a point on the end of the reflector 200 and a fifth horizontal line H5 connecting the center axis of the light source 100a of the light source module 100. [

At this time, the ratio of the fourth distance value D4 and the fifth distance value D5 may be about 1: 1.1-6.

The upper surface of the first reflector 200 and the lower surface of the optical member 600 can be parallel to each other and the upper surface of the second reflector 300 and the lower surface of the optical member 600 They may face each other and may not be parallel to each other.

The lower surface of the first reflector 200 and the upper surface of the second reflector 300 may face each other and may not be parallel to each other.

6A to 6C are cross-sectional views showing the arrangement relationship between the optical member and the first and second reflectors according to the fourth embodiment.

6A to 6C, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, and the optical member 600 is disposed between the first reflector 200 and the second reflector 300, And may be disposed at a predetermined interval from the second reflector 300.

Here, the second reflector 300 may include a first inclined surface, a second inclined surface, and a third inclined surface.

At this time, the first inclined surface of the second reflector 300 may be inclined toward the upper direction adjacent to the light source module 100, and the second inclined surface of the second reflector 300 may be inclined toward the upper side of the second reflector 300 And may be inclined downward from the first inclined surface of the second reflector 300. [

The third inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 and may be inclined upward from the second inclined surface of the second reflector 300. [

At this time, the first inclined surface of the second reflector 300 is closer to the optical member 600 and further away from the second inclined surface of the second reflector 300, as the second inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 The distance from the optical member 600 can be increased.

For example, the first inclined surface of the second reflector 300 may be a flat surface, and the second inclined surface and the third inclined surface of the second reflector 300 may be concave curved surfaces, Can be disposed on both sides.

The first inclined surface of the second reflector 300 may include a boundary line that contacts the second inclined surface of the second reflector 300. [

6A, the sixth distance value D6 between the first vertical line V1 connecting a point on the boundary line and the second vertical line V2 connecting a point on the end portion of the second reflector 300, May be larger than a seventh distance value D7 between a third vertical line V3 connecting one point of one end of the first reflector 200 and a fourth vertical line V4 connecting one point of the other end of the first reflector 200. [

At this time, the ratio of the sixth distance value D6 to the seventh distance value D7 may be about 1.1 - 3: 1.

The termination of the first reflector 200 refers to the edge area of the upper surface 200a of the first reflector 200, the edge area of the lower surface 200b of the first reflector 200, 200 may be any one of a side surface region between the upper surface 200a and the lower surface 200b.

The end of the second reflector 300 corresponds to the edge area of the upper surface 300a of the second reflector 300, the edge area of the lower surface 300b of the second reflector 300, 300 may be any one of a side surface region between the upper surface 300a and the lower surface 300b.

6B, the sixth distance value D6 between the first vertical line V1 connecting a point on the boundary line and the second vertical line V2 connecting a point on the end portion of the second reflector 300 is The seventh distance D7 between the third vertical line V3 connecting one point of one end of the first reflector 200 and the fourth vertical line V4 connecting one point of the other end of the first reflector 200. [

6C, a sixth distance value D6 between a first vertical line V1 connecting a point on the boundary line and a second vertical line V2 connecting a point on the end portion of the second reflector 300 May be smaller than a seventh distance value D7 between a third vertical line V3 connecting one point of one end of the first reflector 200 and a fourth vertical line V4 connecting one point of the other end of the first reflector 200 .

At this time, the ratio of the sixth distance value D6 to the seventh distance value D7 may be about 1: 1.1-3.

The upper surface of the first reflector 200 and the lower surface of the optical member 600 can be parallel to each other and the upper surface of the second reflector 300 and the lower surface of the optical member 600 They may face each other and may not be parallel to each other.

The lower surface of the first reflector 200 and the upper surface of the second reflector 300 may face each other and may not be parallel to each other.

7A to 7C are cross-sectional views showing the arrangement relationship of the optical member and the first and second reflectors according to the fifth embodiment.

7A to 7C, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, and the optical member 600 is disposed between the first reflector 200 and the second reflector 300, And may be disposed at a predetermined interval from the second reflector 300.

Here, the second reflector 300 may include a first inclined surface, a second inclined surface, and a third inclined surface.

At this time, the first inclined surface of the second reflector 300 may be inclined toward the upper direction adjacent to the light source module 100, and the second inclined surface of the second reflector 300 may be inclined toward the upper side of the second reflector 300 And may be inclined downward from the first inclined surface of the second reflector 300. [

The third inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 and may be inclined upward from the second inclined surface of the second reflector 300. [

At this time, the first inclined surface of the second reflector 300 is closer to the optical member 600 and further away from the second inclined surface of the second reflector 300, as the second inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 The distance from the optical member 600 can be increased.

For example, the first inclined surface of the second reflector 300 may be a flat surface, and the second inclined surface and the third inclined surface of the second reflector 300 may be concave curved surfaces, Can be disposed on both sides.

The first inclined surface of the second reflector 300 may include a boundary line that contacts the second inclined surface of the second reflector 300. [

7A, a seventh distance value D7 between a third vertical line V3 connecting one point of one end of the first reflector 200 and a fourth vertical line V4 connecting one point of the other end of the first reflector 200 May be greater than an eighth distance value D8 between a first vertical line V1 connecting a point on the boundary line and a fourth vertical line V4 connecting a point on the other end of the first reflector 200. [

At this time, the ratio of the seventh distance value D7 to the eighth distance value D8 may be about 1.1 - 2: 1.

The termination of the first reflector 200 refers to the edge area of the upper surface 200a of the first reflector 200, the edge area of the lower surface 200b of the first reflector 200, 200 may be any one of a side surface region between the upper surface 200a and the lower surface 200b.

The end of the second reflector 300 corresponds to the edge area of the upper surface 300a of the second reflector 300, the edge area of the lower surface 300b of the second reflector 300, 300 may be any one of a side surface region between the upper surface 300a and the lower surface 300b.

7B, a seventh distance between the third vertical line V3 connecting one point of one end of the first reflector 200 and the fourth vertical line V4 connecting one point of the other end of the first reflector 200, The value D7 may be equal to an eighth distance value D8 between a first vertical line V1 connecting a point on the boundary line and a fourth vertical line V4 connecting a point on the other end of the first reflector 200. [

7C, between the third vertical line V3 connecting one point of one end of the first reflector 200 and the fourth vertical line V4 connecting one point of the other end of the first reflector 200, The distance value D7 may be smaller than the eighth distance value D8 between the first vertical line V1 connecting a point on the boundary line and the fourth vertical line V4 connecting a point on the other end of the first reflector 200. [

At this time, the ratio of the seventh distance value D7 to the eighth distance value D8 may be about 1: 1.1-2.

The upper surface of the first reflector 200 and the lower surface of the optical member 600 can be parallel to each other and the upper surface of the second reflector 300 and the lower surface of the optical member 600 They may face each other and may not be parallel to each other.

The lower surface of the first reflector 200 and the upper surface of the second reflector 300 may face each other and may not be parallel to each other.

8 is a cross-sectional view showing the arrangement relationship between the optical member and the first and second reflectors according to the sixth embodiment.

8, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, and the optical member 600 is disposed between the first reflector 200 and the second reflector 300, (Not shown).

Here, the second reflector 300 may include a first inclined surface, a second inclined surface, and a third inclined surface.

At this time, the first inclined surface of the second reflector 300 may be inclined toward the upper direction adjacent to the light source module 100, and the second inclined surface of the second reflector 300 may be inclined toward the upper side of the second reflector 300 And may be inclined downward from the first inclined surface of the second reflector 300. [

The third inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 and may be inclined upward from the second inclined surface of the second reflector 300. [

At this time, the first inclined surface of the second reflector 300 is closer to the optical member 600 and further away from the second inclined surface of the second reflector 300, as the second inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 The distance from the optical member 600 can be increased.

For example, the first inclined surface of the second reflector 300 may be a flat surface, and the second inclined surface and the third inclined surface of the second reflector 300 may be concave curved surfaces, Can be disposed on both sides.

The first inclined surface of the second reflector 300 may include a boundary line that contacts the second inclined surface of the second reflector 300. [

Here, as shown in FIG. 8, the angle? Between the fourth horizontal line H4 connecting one point of the boundary line and the upper surface 300a of the first inclined surface of the second reflector 300 may be about 10-80 degrees.

As an example, the angle? Between the fourth horizontal line H4 connecting a point on the boundary line and the upper surface 300a of the first inclined surface of the second reflector 300 may be about 25-65 degrees.

The upper surface of the first reflector 200 and the lower surface of the optical member 600 can be parallel to each other and the upper surface of the second reflector 300 and the lower surface of the optical member 600 They may face each other and may not be parallel to each other.

The lower surface of the first reflector 200 and the upper surface of the second reflector 300 may face each other and may not be parallel to each other.

9A to 9C are sectional views showing the arrangement of the second reflector.

9A to 9C, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, and the optical member 600 includes the first reflector 200 and the second reflector 300, And may be disposed at a predetermined interval from the second reflector 300.

Here, the second reflector 300 may include a first inclined surface, and the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and be inclined upward.

The lower surface of the first reflector 200 and the upper surface 300a of the second reflector 300 may face each other and may not be parallel to each other.

9A, the side surface 300a1 between the upper surface 300a and the lower surface 300b of the second reflector 300 at the end of the second reflector 300 is located on the side of the substrate 300 of the light source module 100, And may correspond to a straight line extending from the lower surface 100b1 of the base plate 100b.

That is, the light source module 100 includes a light source 100a and a substrate 100b. The substrate 100b includes an upper surface 100b2 on which the light source 100a is disposed, a lower surface 100b2 on which the upper surface 100b2 faces, And a surface 100b1.

The side surface 300a1 of one end of the second reflector 300 may be arranged to correspond to a straight line extending from the lower surface 100b1 of the substrate 100b of the light source module 100. [

The light source module 100 including the light source 100a and the substrate 100b and the first reflector 200 may be disposed so as to overlap the first inclined surface of the second reflector 300. [

9B, the side surface 300a1 between the upper surface 300a and the lower surface 300b of the second reflector 300 at the end of the second reflector 300 is located at a position closer to the light source module 100, The upper surface 100b2 of the substrate 100b of FIG.

That is, the side surface 300a1 of one end of the second reflector 300 may be arranged to correspond to a straight line extending from the upper surface 100b2 of the substrate 100b of the light source module 100. [

The light source 100a and a part of the first reflector 200 may be arranged so as to overlap within the first inclined plane of the second reflector 300 except for the substrate 100b of the light source module 100. [

9C, the side surface 300a1 between the upper surface 300a and the lower surface 300b of the second reflector 300 at the end of the second reflector 300 is connected to the light source module 100 The light source 100a of the light source 100 may be arranged to correspond to a straight line extending from the upper surface 100a1 of the light source 100a.

That is, the side surface 300a1 of one end of the second reflector 300 may be arranged to correspond to a straight line extending from the upper surface 100a1 of the light source 100a of the light source module 100. [

Therefore, except for the light source module 100, a part of the first reflector 200 can be arranged to overlap within the first inclined plane of the second reflector 300

As described above, a part of the first inclined surface of the second reflector 300 can be overlapped with at least one of the first reflector 200 and the light source module 100.

10A to 10C are sectional views showing a first inclined surface of the second reflector.

10A to 10C, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, the optical member 600 includes the first reflector 200 and the second reflector 300, And may be disposed at a predetermined interval from the second reflector 300.

Here, the second reflector 300 may include a first inclined surface, and the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and be inclined upward.

The lower surface of the first reflector 200 and the upper surface 300a of the second reflector 300 may face each other and may not be parallel to each other.

The first inclined surface of the second reflector 300 may be a flat surface as shown in Fig. 10A.

The first inclined surface of the second reflector 300 may be a concave curved surface as shown in FIG. 10B. In another case, the first inclined surface of the second reflector 300 may be convex It may be a curved surface.

11 is a sectional view showing the second and third inclined surfaces of the second reflector.

11, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, and the optical member 600 is disposed between the first reflector 200 and the second reflector 300, (Not shown).

Here, the second reflector 300 may include a first inclined surface, a second inclined surface, and a third inclined surface.

At this time, the first inclined surface of the second reflector 300 may be inclined toward the upper direction adjacent to the light source module 100, and the second inclined surface of the second reflector 300 may be inclined toward the upper side of the second reflector 300 And may be inclined downward from the first inclined surface of the second reflector 300. [

The third inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 and may be inclined upward from the second inclined surface of the second reflector 300. [

At this time, the second inclined surface and the third inclined surface of the second reflector 300 may be disposed adjacent to each other with the inflection point P as a center.

Here, the second inclined surface of the second reflector 300 may be an inclined surface inclined downward, and the third inclined surface of the second reflector 300 may be inclined upward.

The second inclined surface of the second reflector 300 may have a first radius of curvature R1 and the third inclined surface of the second reflector 300 may have a second radius of curvature R2.

At this time, the first radius of curvature R1 and the second radius of curvature R2 may be different from each other.

In some cases, the second inclined surface or the third inclined surface of the second reflector 300 may be any one of a flat surface, a concave surface, and a convex surface.

On the other hand, the first inclined surface of the second reflector 300 may be a diffuse reflection region that diffusely reflects light, and the second inclined surface of the second reflector 300 may be a regular reflection region regularly reflecting the light.

Next, the third inclined surface of the second reflector 300 may be at least one of a diffuse reflection region that diffuses light diffusely and a regular reflection region that regularly reflects light.

12 is a sectional view showing the second, third and fourth inclined surfaces of the second reflector.

12, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, and the optical member 600 is disposed between the first reflector 200 and the second reflector 300, (Not shown).

Here, the second reflector 300 may include a first inclined surface, a second inclined surface, a third inclined surface, and a fourth inclined surface.

At this time, the first inclined surface of the second reflector 300 may be inclined toward the upper direction adjacent to the light source module 100, and the second inclined surface of the second reflector 300 may be inclined toward the upper side of the second reflector 300 And may be inclined downward from the first inclined surface of the second reflector 300. [

The third inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 and may be inclined upward from the second inclined surface of the second reflector 300. [

Next, the fourth inclined surface of the second reflector 300 may be disposed adjacent to the third inclined surface.

At this time, the second inclined surface and the third inclined surface of the second reflector 300 may be disposed adjacent to each other with the first inflection point P1 as a center, and the third inclined surface and the fourth inclined surface of the second reflector 300, And can be disposed adjacent to each other with the second inflection point P2 as the center.

Here, the second inclined surface of the second reflector 300 may be an inclined surface inclined downward, the third inclined surface of the second reflector 300 may be an inclined surface inclined upward, and the second inclined surface of the second reflector 300 may be inclined. The fourth inclined surface may be an inclined surface bent from the upper direction to the lower direction.

The second inclined surface of the second reflector 300 has a first curvature radius R1, the third inclined surface of the second reflector 300 has a second curvature radius R2, and the fourth inclined surface of the second reflector 300 May have a third radius of curvature R3.

At this time, the first radius of curvature R1 and the second radius of curvature R2 may be different from each other.

Alternatively, the third radius of curvature R3 may be different from the first radius of curvature R1 or may be different from the second radius of curvature R2.

In some cases, the second inclined surface, the third inclined surface, or the fourth inclined surface of the second reflector 300 may be any one of a flat plane, a concave curved surface, and a convex curved surface.

On the other hand, the first inclined surface of the second reflector 300 may be a diffuse reflection region that diffusely reflects light, and the second inclined surface of the second reflector 300 may be a regular reflection region regularly reflecting the light.

The third inclined plane or the fourth inclined plane of the second reflector 300 may be at least one of a diffuse reflection region that diffusely reflects light and a regular reflection region that regularly reflects light.

At least one supporter 500 may be disposed on the fourth inclined surface of the second reflector 300.

The supporter 500 supports a part of the optical member 600 in order to prevent deflection of the optical member 600 and may be disposed at a certain distance from the optical member 600 .

13A to 13C are sectional views showing a fourth inclined surface of the second reflector.

13A, the fourth inclined surface of the second reflector 300 may be a plane parallel to the first reflector.

13B, the fourth inclined surface of the second reflector 300 may be a concave curved surface having a third curvature radius R3, and as shown in FIG. 13C, the second inclined surface of the second reflector 300 The fourth inclined surface may be a convex curved surface having a third curvature radius R3.

Thus, the fourth inclined surface of the second reflector is formed in a gentle shape without a protruding region, thereby reducing a hot spot phenomenon and providing a uniform luminance.

Fig. 14 is a sectional view showing the arrangement of the spacing member of Fig. 2; Fig.

14, the light source module 100 is disposed between the first reflector 200 and the second reflector 300, and the optical member 600 is disposed between the first reflector 200 and the second reflector 300, (Not shown).

Further, a separation member 400 may be disposed between the optical member 600 and the first reflector 200.

The upper surface 400a of the spacing member 400 is in contact with the optical member 600 and the lower surface 400b of the spacing member 400 is in contact with the first reflector 200. [

At this time, the distance D between the upper surface 400a and the lower surface 400b of the spacing member 400 may be about 4-12 mm.

The upper surface 400a of the spacing member 400 may have a larger area than the lower surface 400b of the spacing member 400.

The angle between the lower surface 400b of the spacer member 400 and the side surface 400c of the spacer member 400 may be an obtuse angle.

Optionally, the spacing member 400 may be an empty separation member having a hollow shape.

The spacing member 400 may include a body portion 400d connected to the spacing member 400. The light source module 100 is connected to the body portion 400d of the spacing member 400, .

In addition, a plurality of heat dissipating protrusions may be disposed on a part of the spacing member 400.

As described above, the spacing member 400 has an effective gap between the first reflector 200 and the optical member 600, thereby reducing the bezel area of the backlight unit, 100 to the outside.

The upper surface of the first reflector 200 and the lower surface of the optical member 600 can be parallel to each other and the upper surface of the second reflector 300 and the lower surface of the optical member 600 They may face each other and may not be parallel to each other.

The lower surface of the first reflector 200 and the upper surface of the second reflector 300 may face each other and may not be parallel to each other.

Next, the second reflector 300 may include a first inclined surface, a second inclined surface, and a third inclined surface.

Here, the first inclined surface of the second reflector 300 may be inclined toward the upper direction adjacent to the light source module 100, and the second inclined surface of the second reflector 300 may be inclined toward the upper side of the second reflector 300 And may be inclined downward from the first inclined surface of the second reflector 300. [

The third inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 and may be inclined upward from the second inclined surface of the second reflector 300. [

At this time, the first inclined surface of the second reflector 300 is closer to the optical member 600 and further away from the second inclined surface of the second reflector 300, as the second inclined surface of the second reflector 300 is adjacent to the second inclined surface of the second reflector 300 The distance from the optical member 600 can be increased.

For example, the first inclined surface of the second reflector 300 may be a flat surface, and the second inclined surface and the third inclined surface of the second reflector 300 may be concave curved surfaces, Can be disposed on both sides.

15A and 15B are cross-sectional views showing the side surfaces of the spacing member.

15A, the upper surface 400a of the spacing member 400 is in contact with the optical member, and the lower surface 400b of the spacing member 400 is in contact with the first reflector.

At this time, the distance D between the upper surface 400a and the lower surface 400b of the spacing member 400 may be about 4-12 mm.

The upper surface 400a of the spacing member 400 may have a larger area than the lower surface 400b of the spacing member 400.

The angle? 11 between the lower surface 400b of the spacer member 400 and the side surface 400c of the spacer member 400 may be an obtuse angle.

15B, the side surface 400c of the spacing member 400 may be a vertical plane, and the lower surface 400b of the spacing member 400 and the side surface 400c of the spacing member 400 400c may be at right angles.

The spacing member 400 may include a body portion 400d connected to the spacing member 400. The light source module may be attached to the body portion 400d of the spacing member 400 have.

16A and 16B are sectional views showing the shapes of the spacing members.

The upper surface 400a of the spacing member 400 is in contact with the optical member and the lower surface 400b of the spacing member 400 is in contact with the first reflector as shown in Fig.

The upper surface 400a of the spacing member 400 may have a larger area than the lower surface 400b of the spacing member 400.

The angle? 11 between the lower surface 400b of the spacer member 400 and the side surface 400c of the spacer member 400 may be an obtuse angle.

Here, the spacing member 400 may be an empty separation member having a hollow shape.

That is, in the cross section of the spacer member 400, a hole 410 may be formed in the central region.

The spacing member 400 may include a body portion 400d connected to the spacing member 400. The light source module may be attached to the body portion 400d of the spacing member 400 have.

In some cases, as shown in FIG. 16B, the spacing member 400 may be an empty separation member having a hollow shape with one side opened.

That is, in the cross section of the spacer member 400, a groove 420 may be formed in which one side is opened in the central region.

When the spacing member 400 is an empty separation member having a hollow shape, the weight of the spacing member 400 is reduced, so that the total weight of the backlight unit can be reduced.

17A and 17B are cross-sectional views showing the heat dissipation protrusions of the spacing member.

17A, the upper surface 400a of the spacing member 400 is in contact with the optical member, and the lower surface 400b of the spacing member 400 is in contact with the first reflector.

The upper surface 400a of the spacing member 400 may have a larger area than the lower surface 400b of the spacing member 400.

The angle between the lower surface 400b of the spacer member 400 and the side surface 400c of the spacer member 400 may be an obtuse angle.

Here, the spacing member 400 may be an empty separation member having a hollow shape.

The spacing member 400 may include a body portion 400d connected to the spacing member 400. The light source module may be attached to the body portion 400d of the spacing member 400 have.

Next, a plurality of heat dissipation protrusions 450 may be disposed on a part of the spacing member 400.

For example, when the spacing member 400 is an empty separation member having a hollow shape with one side opened, the plurality of the heat dissipating protrusions 450 are formed in the groove (not shown) of the spacing member 400, 420).

In some cases, as shown in FIG. 17B, the plurality of heat dissipating protrusions 450 may be disposed in the body portion 400d of the spacing member 400. FIG.

The plurality of heat dissipation protrusions 450 may be formed in the region of the groove 420 of the spacing member 400 adjacent to the light source module 100 or the region of the body portion 400d of the spacing member 400 adjacent to the light source module 100, The heat generated from the light source module 100 can be discharged to the outside.

18 is a cross-sectional view showing the body portion of the spacer.

The upper surface 400a of the spacing member 400 is in contact with the optical member 600 and the lower surface 400b of the spacing member 400 is in contact with the first reflector 200 .

The upper surface 400a of the spacing member 400 may have a larger area than the lower surface 400b of the spacing member 400.

The angle between the lower surface 400b of the spacer member 400 and the side surface 400c of the spacer member 400 may be an obtuse angle.

The spacing member 400 may include a body portion 400d connected to the spacing member 400. The light source module 100 is connected to the body portion 400d of the spacing member 400, .

A heat radiation tape may be disposed between the light source module 100 and the body portion 400d of the spacing member 400. [

The reflective sheet 120 may be disposed on the body portion 400d of the spacer member 400. [

Here, the reflective sheet 120 may be disposed on the entire surface of the body portion 400d of the spacing member 400 excluding the region where the light source module 100 is disposed.

As described above, by arranging the reflection sheet 120 on the body portion 400d of the spacer member 400, the efficiency of light can be increased without loss of light.

19A to 19D are views for explaining the arrangement relationship between the light source module and the first and second reflectors.

19A is a view showing a light source module 100 disposed at a certain distance from the first reflector 200 and the second reflector 300 and FIG. FIG. 19C is a view showing a light source module 100 which is in contact with the first reflector 200 and is spaced apart from the second reflector 300 by a predetermined distance, FIG. 19D is a view showing the light source module 100 in contact with the first reflector 200, And a light source module 100 disposed at a predetermined distance from the first reflector 200 and contacting the second reflector 300. As shown in FIG.

19A, the light source module 100 may be spaced apart from the first reflector 200 by a first distance d31 and from the second reflector 300 by a second distance d32.

Here, the first distance d31 and the second distance d32 may be the same or different from each other.

For example, the first distance d31 may be smaller than the second distance d32.

This is because, if the first distance d31 is larger than the second distance d32, a hot spot phenomenon may occur.

19B, 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 .

19C, the light source module 100 may contact the first reflector 200 and may 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.

19D, the light source module 100 may contact the second reflector 300 and may be spaced apart from the first reflector 200 by a distance d.

FIGS. 20A to 20D are views showing a first reflector having an inclined surface, wherein FIG. 20A shows a case in which the inclined plane is a plane, and FIGS. 20B, 20C and 20D show a case in which the inclined plane is a curved surface.

20A to 20D, 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 and the thickness t2 of the region far from the light source module 100 may be different from each other. As shown in FIGS. 20A and 20B, 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. 20C and 20D.

Further, as shown in Fig. 20D, 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.

21A to 21D are views showing a first reflector having a reflection pattern.

21A and 21C show that the reflection pattern 220 is a sawtooth shape and the surface of the reflection pattern 220 is a curved surface. .

Here, FIG. 21B is a curved surface in which the surface of the reflection pattern 220 is concave, and FIG. 21C is a curved surface in which the surface of the reflection pattern 220 is convex.

The size of the reflection pattern 220 may gradually increase from the end of the first reflector 200 to the open area as shown in FIG.

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.

22 is a perspective view showing the optical member.

As shown in FIG. 22, the optical member 600 may be formed in a plurality of layers, and the concave-convex pattern 620 may be on the uppermost layer or the surface of any one layer.

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.

As described above, the optical member 600 diffuses the light emitted from the light source module 100 and may form a concave-convex pattern 620 on the upper surface of the optical member 600 to increase the diffusion effect.

The concavo-convex pattern 620 may have a strip shape arranged along the light source module 100.

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

Optionally, the optical member 600 is made of at least one sheet, and may optionally include a diffusion sheet, a prism sheet, a brightness enhancement sheet, and the like.

Here, the diffusion sheet diffuses the light emitted from the light source, the prism sheet guides the diffused light to the light emitting region, and the brightness diffusion sheet can enhance the brightness.

Thus, the embodiments can reduce the bezel and the thickness of the backlight unit by utilizing an effective gap between the reflector and the optical member.

In addition, in the embodiment, a reflector having an inclined surface is used to manufacture a structure having an air guide without a light guide plate, so that the weight is light, the manufacturing cost is low, and uniform brightness can be provided.

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

Also, the spacing members, the first and second reflectors, and the light source module described in the above-described embodiments can be embodied as a display device, an indicating device, and an illumination system including them. For example, .

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.

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

As shown in FIG. 23, 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.

24 and 25 are views showing a display device according to an embodiment.

24, 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.

25, 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.

In another embodiment, the spacer, the first and second reflectors, and the light source module described in the above-described embodiments may be embodied as a display device, an indicating device, and an illumination system including them, for example, Lamps, and street lamps.

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: spacing member
500: supporter 600: optical member

Claims (20)

A first reflector;
A second reflector;
A light source module disposed between the first reflector and the second reflector; And,
And an optical member disposed at a predetermined distance from the first reflector and the second reflector,
The upper surface of the first reflector and the lower surface of the optical member are parallel to each other,
The lower surface of the first reflector and the upper surface of the second reflector are not parallel to each other,
The second reflector includes a first inclined surface adjacent to the light source module and inclined upward, a second inclined surface adjacent to the first inclined surface and inclined downward from the first inclined surface, And a third inclined surface inclined upward from the second inclined surface,
Wherein an angle between a fourth horizontal line connecting a point of the boundary and the first inclined surface of the second reflector is 10 - 80 degrees,
A first distance value between a first horizontal line connecting a point of an end portion of the optical member and a second horizontal line connecting a point of an end portion of the first reflector, wherein the ratio of a second distance value between a first horizontal line connecting a point of the first reflector and a third horizontal line connecting a point of the end portion of the second reflector is 1: 1.5-4. delete delete delete delete The method according to claim 1,
A third distance value between the fourth horizontal line and a third horizontal line connecting a point of an end portion of the second reflector is a value obtained by dividing a first horizontal line connecting a point of the end of the optical member, Is smaller than a first distance value between a second horizontal line connecting a point on the end of the first electrode
A fourth distance value between the fourth horizontal line and a fifth horizontal line connecting the central axis of the light source of the light source module is a value obtained by dividing a second horizontal line connecting a point of the end of the first reflector and a second horizontal line connecting a center axis of the light source of the light source module Is greater than the fifth distance value between the fifth horizontal line,
Wherein the second inclined surface of the second reflector is a curved surface having a first radius of curvature and the third inclined surface of the second reflector is a curved surface having a second radius of curvature. delete delete delete delete 7. The method according to claim 1 or 6,
Further comprising a fourth inclined surface adjacent to the third inclined surface,
Wherein the fourth inclined surface includes at least one supporter,
Wherein the first inclined surface of the second reflector is a diffusely reflecting region that diffusely reflects light and the second inclined surface of the second reflector is a regularly reflective region regularly reflecting the light. delete A first reflector;
A second reflector;
A light source module disposed between the first reflector and the second reflector; And,
And an optical member disposed at a predetermined distance from the first reflector and the second reflector,
A separation member having an inclined side and a hollow shape is disposed between the optical member and the first reflector,
Wherein the upper surface of the spacing member is in contact with the optical member and has a wider area than the lower surface of the spacing member,
The lower surface of the spacing member is in contact with the first reflector,
The distance between the upper and lower surfaces of the spacer is 4-12 mm,
Wherein the second reflector
A first inclined surface adjacent to the light source module and inclined upward,
And a second inclined surface adjacent to the first inclined surface and inclined downward from the first inclined surface,
Wherein a part of the first inclined surface overlaps with the spacing member. delete delete delete delete A first reflector;
A second reflector;
A light source module disposed between the first reflector and the second reflector; And,
And an optical member disposed at a predetermined distance from the first reflector and the second reflector,
Wherein the second reflector
A central region facing the optical member,
And a peripheral region disposed on both sides of the central region and adjacent to the first reflector and the light source module,
The peripheral region of the second reflector
The second reflector being closer to the central area than the optical member,
A distance between a vertical line connecting one point of the one end of the inclined surface and a vertical line connecting one point of the other end of the inclined surface is a distance between a vertical line connecting one point of one end of the first reflector and a vertical line connecting a point of the other end of the first reflector An illumination system that is larger than the distance between vertical lines that connect one point. delete delete

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