KR20130110757A - Backlight unit and illumination system using the same - Google Patents

Abstract

PURPOSE: A backlight unit and an illumination system using the same are provided to reduce thickness and a bezel by using an effective gap between an optical member and a reflector. CONSTITUTION: A light source module (100) is arranged between a first reflector (200) and a second reflector (300). An optical member (600) is separated from a first and a second reflector at regular intervals. A first horizontal line is connected to the end portion of an optical member. A second horizontal line is connected to the end portion of the first reflector. A third horizontal line is connected to the end portion of the second reflector. [Reference numerals] (AA) Air guide; (BB,EE) First area; (CC,DD) Second area; (FF,HH) Peripheral area; (GG) Central area

Description

Backlight unit and illumination system using the same}

Embodiments relate to a backlight unit and a lighting 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 the self-luminous PDP, an LCD requires a separate backlight unit due to the absence of its own light emitting device.

The backlight unit used in LCD is classified into an edge type backlight unit and a direct type backlight unit according to the position of the light source. In the edge type, the light source is disposed on the left and right sides or the top and bottom sides of the LCD panel and the light guide plate is used. Since the light is evenly distributed on the front surface, the light is uniform and the panel thickness can be made ultra 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) was used as the light source of the existing edge type or direct type backlight unit.

However, since the CCFL-based backlight unit is always powered by the CCFL, a considerable amount of power is consumed, and the problems of environmental pollution due to the addition of about 70% color reproduction rate and mercury are pointed out as disadvantages.

As a substitute for solving the above problems, research on a backlight unit using an LED (Light Emitting Diode) has been actively conducted.

When the LED is used as a backlight unit, the LED array can be partially turned on and off, which can drastically reduce the power consumption. For the RGB LED, it exceeds 100% of the NTSC (National Television System Committee) color reproduction range specification. To provide consumers with more vivid picture quality.

1 is a cross-sectional view illustrating a general backlight unit.

As shown in FIG. 1, the backlight unit includes a light guide plate 2, a reflector 3, an optical member 4, and a light source module 5. It may include.

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

Subsequently, the light guide plate 2 may have 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, which may be disposed on both sides of the light guide plate 2.

The backlight unit having such a structure can uniformly diffuse light using the light guide plate 2, but the light guide plate 2 not only makes the overall backlight unit heavy, but also causes a price increase.

Therefore, in the future, development of a backlight unit capable of uniformly diffusing light even without the light guide plate 2 will be required.

Embodiments provide a backlight unit capable of reducing bezels and thicknesses by using an effective gap between a reflector and an optical member, and an illumination system using the same.

The embodiment also provides a backlight unit having an air guide and an illumination system using the same, without using a light guide plate, by using a reflector having an inclined surface.

Embodiments provide an optical member disposed at regular intervals from a first reflector, a second reflector, a light source module disposed between the first reflector and the second reflector, and a first reflector and a second reflector. And a first distance value between the first horizontal line connecting one point of the end portion of the optical member and the second horizontal line connecting one point of the end portion of the first reflector, and The ratio of the second distance value between the first horizontal line connecting one point of the end portion and the third horizontal line connecting one 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 face each other and may be parallel to each other, and the upper surface of the second reflector and the lower surface of the optical member may face each other and may not be parallel to each other.

In addition, the lower surface of the first reflector and the upper surface of the second reflector may face each other and may not be parallel to each other.

The second reflector is adjacent to the light source module and adjacent to the first inclined surface, adjacent to the first inclined surface, adjacent to the first inclined surface, and inclined downward from the first inclined surface, and adjacent to the second inclined surface. The second inclined surface may include a third inclined surface inclined upwardly.

Here, the first inclined surface of the second reflector may be farther from the optical member as the closer to the second inclined surface of the second reflector, the closer to the optical member, and the farther from the second inclined surface of the second reflector.

Subsequently, the first inclined surface of the second reflector includes a boundary line in contact with the second inclined surface of the second reflector, and includes a fourth horizontal line connecting one point of the boundary line and one 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 and the third distance value may be about 1.1-2: 1.

Further, the first inclined surface of the second reflector includes a boundary line in contact with the second inclined surface of the second reflector, and includes a fourth horizontal line connecting one point of the boundary line and a fifth horizontal line connecting the central 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 one end of the first reflector and a fifth horizontal line connecting a central axis of the light source of the light source module.

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

The first inclined surface of the second reflector includes a boundary line in contact with the second inclined surface of the second reflector, and includes a first vertical line connecting one point of the boundary line and a point of an end portion of the second reflector. The sixth distance value between the connecting second vertical lines may be greater 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 and the seventh distance value may be about 1.1-3: 1.

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

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

Then, the first inclined surface of the second reflector includes a boundary line in contact with 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 It can be 10-80 degrees.

In addition, a portion of the first inclined surface of the second reflector may overlap 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 plane, a concave curved surface, and a convex curved surface.

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

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

Subsequently, the first inclined plane of the second reflector may be a diffuse reflection area that diffusely reflects light, and the second inclined plane of the second reflector may be a specular reflection area that specularly reflects 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 specularly reflects light.

In addition, 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.

At least one supporter may be disposed on the fourth inclined surface.

Next, another embodiment includes an optical element disposed at a predetermined distance from the first reflector, the second reflector, the light source module disposed between the first reflector and the second reflector, and the first reflector and the second reflector. An optical member, wherein a separation member is disposed between the optical member and the first reflector, an upper surface of the spacer member is in contact with the optical member, and a lower surface of the spacer member is connected with the first reflector. In contact, the distance between the top and bottom surfaces 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 spacer member may be an inclined surface, the angle between the lower surface of the spacer member and the side surface of the spacer member may be an obtuse angle.

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

In addition, the spacer member may include a body portion connected to the spacer member, and the light source module may be attached to the body portion of the spacer member.

Subsequently, a plurality of heat dissipation protrusions may be disposed on a part of the spacer member.

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

Next, the area of the first inclined surface of the second reflector may be larger than the area of the lower surface of the spacer or the area of the upper surface of the spacer.

On the other hand, another embodiment, the first reflector (reflector), the second reflector, the light source module disposed between the first reflector and the second reflector, and is arranged at a predetermined interval from the first reflector and the second reflector An optical member, wherein the second reflector includes a central region facing the optical member, a peripheral region disposed on both sides of the central region, and adjacent to the first reflector and the light source module, The peripheral area is an inclined surface that is closer to the optical member as it is closer to the center region of the second reflector, and the distance between the vertical line connecting one point of one end of the inclined plane and the vertical line connecting one point of the other end of the inclined plane is the first. The distance between the vertical line connecting one point of one end of the reflector and the vertical line connecting one point of the other end of the first reflector may be larger.

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

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

In addition, the embodiment uses a reflector having an inclined surface, without a light guide plate, by manufacturing a structure having an air guide (light guide), it is possible to provide a light weight, low manufacturing cost, and uniform brightness.

Therefore, the economics 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 two-edge type backlight unit according to an embodiment.
3 is a cross-sectional view showing an 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 an 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 an arrangement relationship between the optical member and the first and second reflectors according to the third embodiment.
6A to 6C are cross-sectional views showing an arrangement relationship between the optical member and the first and second reflectors according to the fourth embodiment.
7A to 7C are cross-sectional views showing an arrangement relationship between the optical member and the first and second reflectors according to the fifth embodiment.
8 is a cross-sectional view showing an arrangement relationship between an optical member and first and second reflectors according to a sixth embodiment;
9A-9C are cross-sectional views showing the arrangement of the second reflector
10A to 10C are cross-sectional views showing a first inclined surface of the second reflector
11 is a cross-sectional view showing the second and third inclined surfaces of the second reflector.
12 is a cross-sectional view showing second, third and fourth inclined surfaces of the second reflector.
13A-13C are cross-sectional views showing a fourth inclined plane of the second reflector
14 is a cross-sectional view showing the arrangement of the spacer member of FIG.
15A and 15B are cross-sectional views showing side surfaces of the spacer member.
16A and 16B are cross-sectional views showing the shape of the spacer member.
17A and 17B are cross-sectional views showing heat dissipation protrusions of the spacer member.
18 is a cross-sectional view showing a body portion of the spacer member
19A to 19D are views for explaining an arrangement relationship between the light source module and the first and second reflectors.
20a to 20d show a first reflector having an inclined surface
21A-21D show a first reflector having a reflective pattern
22 is a perspective view showing an optical member
23 illustrates a display module having a backlight unit according to an embodiment.
24 and 25 illustrate a display apparatus 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. In addition, the size of each component does not necessarily reflect the actual size.

2 is a cross-sectional view for describing a two-edge type backlight unit according to an embodiment.

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

In addition, in the backlight unit, a separation member may be further disposed.

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

In some cases, the light source module 100 may be disposed away from the second reflector 300 at the same time as being in contact with the first reflector 200, or may be disposed in contact with the second reflector 300 and at the same time as the first reflector 300. 200 may be spaced apart from each other.

Alternatively, the light source module 100 may be disposed apart from the first reflector 200 and the second reflector 300 by a predetermined distance, 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 printed circuit board (PCB) substrate made of any one material selected from polyethylene terephthalate (PET), glass, polycarbonate (PC), and silicon (Si), or may be formed in a film form. have.

In addition, the substrate 100b may selectively use 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 any one of a reflective coating film and a reflective coating material layer, and may reflect light generated by the light source 100b to the central region of the second reflector 300.

Subsequently, the light source 100a may be a light emitting diode chip, and the light emitting diode chip may include a blue LED chip or an ultraviolet LED chip, or a red LED chip, a green LED chip, a blue LED chip, and yellow green. ) It may be configured in a package form combining at least one or more of the LED chip, the white LED chip.

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

Next, the first reflector 200 and the second reflector 300 may face each other at a predetermined interval so as to have an air guide in the empty space between the first reflector 200 and the second reflector 300. have.

In addition, the first reflector 200 may be formed of any one of a reflective coating film and a reflective coating material layer to reflect the light generated from the light source module 100 in the direction of the second reflector 300.

In addition, a serrated reflection pattern is formed on a 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 reflective pattern on the surface of the first reflector 200 is to increase the luminance in the central region of the backlight unit by reflecting the light generated by the light source module 100 to the central region of the second reflector 300. to be.

Subsequently, the second reflector 300 may include a metal or a metal oxide having high reflectance such as aluminum (Al), silver (Ag), gold (Au), titanium dioxide (TiO ₂ ), or the like.

In addition, the second reflector 300 may have an inclined surface on a portion thereof, and the inclined surface of the second reflector 300 may overlap at least one of the light source module 100 and the first reflector 200. have.

Here, the inclined surface of the second reflector 300 may be a surface 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, or a flat surface. It may be at least one of).

In some cases, the second reflector 300 may include at least one inclined surface and at least one flat surface. The plane of the second reflector 300 may be connected to the first reflector 200. It may be a parallel plane.

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

For example, the second reflector 300 may include 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. Can be.

Here, the peripheral area 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 that is closer to the optical member 600 as it is closer to the center region of the second reflector 300.

The central region of the second reflector 300 may be divided into a first region and a second region around the inflection point P. The first region of the second reflector 300 is an inclined surface inclined downward. The second region 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 may have a first radius of curvature, and the inclined surface of the second region of the second reflector 300 may have a second radius of curvature, and the first radius of curvature and the first The two radii of curvature 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 the inclined surfaces adjacent to each inflection point P may be different from each other.

Meanwhile, the optical member 600 may be spaced apart from the second reflector 300 at a predetermined interval.

In addition, 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 an uneven pattern on the upper surface.

The optical member 600 is to diffuse the light emitted from the light source module 100, and may form an uneven 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 such, the optical member 600 may be disposed at a predetermined distance from the first reflector 200 and the second reflector 300, and one of the end portions of the optical member 600 may be disposed. Of the first distance value D1 between the first horizontal line H1 connecting the points and the second horizontal line H2 connecting the points, 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.

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

In addition, 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.

Here, the upper surface 400a of the spacer 400 may contact the optical member 600, and the lower surface 400b of the spacer 400 may contact the first reflector 200.

In this case, the distance between the upper surface 400a and the lower surface 400b of the spacer 400 may be about 4-12 mm.

In addition, the upper surface 400a of the spacer 400 may have a larger area than the lower surface 400b of the spacer 400.

In addition, the side surface of the spacer member 400 may be an inclined surface, 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.

In some cases, the spacer member 400 may be an empty separation member having a hollow shape.

In addition, the spacer 400 may include a body portion connected to the spacer 400, and the light source module 100 may be attached to the body of the spacer 400.

In addition, a plurality of heat dissipation protrusions may be disposed on a part of the spacer 400.

As such, the embodiment may 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, the embodiment may reduce the thickness of the backlight unit and provide uniform luminance by manufacturing the peripheral area of the second reflector 300 adjacent to the light source module 100 to an inclined surface inclined upward.

In addition, the embodiment can manufacture a backlight unit having an air guide without using a light guide plate by using a reflector having an inclined surface, thereby reducing the weight of the backlight unit and reducing manufacturing costs.

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

As shown in FIG. 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. It may be arranged at a predetermined interval from 300.

Here, 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 D1 and a third horizontal line H3 connecting one point of an end portion of the optical member 600 and a point of an end portion of the second reflector 300. The ratio of values D2 may be about 1: 1.5-4.

At this time, the end of the optical member 600 is an edge region of the upper surface 600a of the optical member 600, an edge region of the lower surface 600b of the optical member 600, and an upper portion of the optical member 600. It may be any one of the side regions between the surface 600a and the lower surface 600b.

The end of the first reflector 200 includes an edge region of the upper surface 200a of the first reflector 200, an edge region of the lower surface 200b of the first reflector 200, and a first reflector ( It may be any one of the side regions between the upper surface 200a and the lower surface 200b of the 200.

The end of the second reflector 300 is an edge region of the upper surface 300a of the second reflector 300, an edge region of the lower surface 300b of the second reflector 300, and a second reflector ( It may be any one of the side regions between the upper surface 300a and the lower surface 300b of the 300.

For example, a first distance 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. The value D1 may be about 4-12 mm.

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

In addition, 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.

Subsequently, the second reflector 300 may include a first inclined plane, a second inclined plane, and a third inclined plane.

Here, the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and may be inclined in an upward direction, and the second inclined surface of the second reflector 300 may be formed of the second reflector 300. It may be adjacent to the first inclined surface and inclined downward from the first inclined surface of the second reflector 300.

The third inclined surface of the second reflector 300 may be 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, the closer to the second inclined surface of the second reflector 300, the closer to the optical member 600, the farther from the second inclined surface of the second reflector 300. The further, the greater the distance from the optical member 600.

For example, the first inclined plane of the second reflector 300 may be a flat plane, and the second inclined plane and the third inclined plane of the second reflector 300 may be concave curved surfaces, respectively, around the inflection point P. It can be placed on both sides.

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

As shown in FIGS. 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 may be disposed at a predetermined interval.

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

In this case, the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and may be inclined in an upward direction, and the second inclined surface of the second reflector 300 may be formed of the second reflector 300. It may be adjacent to the first inclined surface and inclined downward from the first inclined surface of the second reflector 300.

The third inclined surface of the second reflector 300 may be 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, the closer to the second inclined surface of the second reflector 300, the closer to the optical member 600, the farther from the second inclined surface of the second reflector 300. The further, the greater the distance from the optical member 600.

For example, the first inclined plane of the second reflector 300 may be a flat plane, and the second inclined plane and the third inclined plane of the second reflector 300 may be concave curved surfaces, respectively, around the inflection point P. It can be placed on both sides.

In addition, the first inclined surface of the second reflector 300 may include a boundary line in contact with the second inclined surface of the second reflector 300.

Here, as shown in FIG. 4A, the third distance value 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 optical. It 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.

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

Here, the end of the optical member 600 is an edge region of the upper surface 600a of the optical member 600, an edge region of the lower surface 600b of the optical member 600, and an upper portion of the optical member 600. It may be any one of the side regions between the surface 600a and the lower surface 600b.

The end of the first reflector 200 includes an edge region of the upper surface 200a of the first reflector 200, an edge region of the lower surface 200b of the first reflector 200, and a first reflector ( It may be any one of the side regions between the upper surface 200a and the lower surface 200b of the 200.

The end of the second reflector 300 is an edge region of the upper surface 300a of the second reflector 300, an edge region of the lower surface 300b of the second reflector 300, and a second reflector ( It may be any one of the side regions between the upper surface 300a and the lower surface 300b of the 300.

For example, a first distance 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. The value D1 may be about 4-12 mm.

In some cases, as shown in FIG. 4B, the third distance value 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 The first distance value D1 between the first horizontal line H1 connecting one end of the optical member 600 and the second horizontal line H2 connecting one point of the end of the first reflector 200 may be the same.

As another case, as shown in FIG. 4C, the third distance value 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 greater 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.

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

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

In addition, 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 an 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, and the optical member 600 includes the first reflector 200 and The second reflector 300 may be disposed at a predetermined interval.

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

In this case, the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and may be inclined in an upward direction, and the second inclined surface of the second reflector 300 may be formed of the second reflector 300. It may be adjacent to the first inclined surface and inclined downward from the first inclined surface of the second reflector 300.

The third inclined surface of the second reflector 300 may be 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, the closer to the second inclined surface of the second reflector 300, the closer to the optical member 600, the farther from the second inclined surface of the second reflector 300. The further, the greater the distance from the optical member 600.

For example, the first inclined plane of the second reflector 300 may be a flat plane, and the second inclined plane and the third inclined plane of the second reflector 300 may be concave curved surfaces, respectively, around the inflection point P. It can be placed on both sides.

In addition, the first inclined surface of the second reflector 300 may include a boundary line in contact with the second inclined surface of the second reflector 300.

Here, as shown in FIG. 5A, the fourth distance value D4 between the fourth horizontal line H4 connecting one point of the boundary line and the fifth horizontal line H5 connecting the central axis of the light source 100a of the light source module 100 is the first reflector ( It may be greater than a fifth distance value D5 between the second horizontal line H2 connecting one end of the tip 200 and the fifth horizontal line H5 connecting the central axis of the light source 100a of the light source module 100.

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

Here, the end of the first reflector 200 means an edge region of the upper surface 200a of the first reflector 200, an edge region of the lower surface 200b of the first reflector 200, and a first reflector ( It may be any one of the side regions between the upper surface 200a and the lower surface 200b of the 200.

In some cases, as shown in FIG. 5B, the fourth distance value D4 between the fourth horizontal line H4 connecting one point of the boundary line and the fifth horizontal line H5 connecting the central axis of the light source 100a of the light source module 100 is the first value. It may be equal to the fifth distance value D5 between the second horizontal line H2 connecting one end of the reflector 200 and the fifth horizontal line H5 connecting the central axis of the light source 100a of the light source module 100.

In another case, as shown in FIG. 5C, the fourth distance value D4 between the fourth horizontal line H4 connecting one point of the boundary line and the fifth horizontal line H5 connecting the central axis of the light source 100a of the light source module 100 is defined as the fourth distance value D4. It may be smaller than the fifth distance value D5 between the second horizontal line H2 connecting one end of the first reflector 200 and the fifth horizontal line H5 connecting the central axis of the light source 100a of the light source module 100.

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

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

In addition, 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 an 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 includes the first reflector 200 and The second reflector 300 may be disposed at a predetermined interval.

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

In this case, the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and may be inclined in an upward direction, and the second inclined surface of the second reflector 300 may be formed of the second reflector 300. It may be adjacent to the first inclined surface and inclined downward from the first inclined surface of the second reflector 300.

The third inclined surface of the second reflector 300 may be 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, the closer to the second inclined surface of the second reflector 300, the closer to the optical member 600, the farther from the second inclined surface of the second reflector 300. The further, the greater the distance from the optical member 600.

For example, the first inclined plane of the second reflector 300 may be a flat plane, and the second inclined plane and the third inclined plane of the second reflector 300 may be concave curved surfaces, respectively, around the inflection point P. It can be placed on both sides.

In addition, the first inclined surface of the second reflector 300 may include a boundary line in contact with the second inclined surface of the second reflector 300.

6A, the sixth distance value D6 between the first vertical line V1 connecting one point of the boundary line and the second vertical line V2 connecting one point of the end portion of the second reflector 300 is defined as the first value. It may be greater than a seventh distance value 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.

In this case, the ratio of the sixth distance value D6 and the seventh distance value D7 may be about 1.1-3: 1.

Here, the end of the first reflector 200 means an edge region of the upper surface 200a of the first reflector 200, an edge region of the lower surface 200b of the first reflector 200, and a first reflector ( It may be any one of the side regions between the upper surface 200a and the lower surface 200b of the 200.

The end of the second reflector 300 is an edge region of the upper surface 300a of the second reflector 300, an edge region of the lower surface 300b of the second reflector 300, and a second reflector ( It may be any one of the side regions between the upper surface 300a and the lower surface 300b of the 300.

In some cases, as shown in FIG. 6B, the sixth distance value D6 between the first vertical line V1 connecting one point of the boundary line and the second vertical line V2 connecting one point of the end portion of the second reflector 300 is The third distance 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 may be the same as the seventh distance value D7.

As another case, as shown in FIG. 6C, the sixth distance value D6 between the first vertical line V1 connecting one point of the boundary line and the second vertical line V2 connecting one point of the end portion of the second reflector 300. May be smaller than the seventh distance value 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. .

In this case, the ratio of the sixth distance value D6 and the seventh distance value D7 may be about 1: 1.1-3.

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

In addition, 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 an arrangement relationship between the optical member and the first and second reflectors according to the fifth embodiment.

As shown in FIGS. 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 includes the first reflector 200 and The second reflector 300 may be disposed at a predetermined interval.

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

In this case, the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and may be inclined in an upward direction, and the second inclined surface of the second reflector 300 may be formed of the second reflector 300. It may be adjacent to the first inclined surface and inclined downward from the first inclined surface of the second reflector 300.

The third inclined surface of the second reflector 300 may be 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, the closer to the second inclined surface of the second reflector 300, the closer to the optical member 600, the farther from the second inclined surface of the second reflector 300. The further, the greater the distance from the optical member 600.

For example, the first inclined plane of the second reflector 300 may be a flat plane, and the second inclined plane and the third inclined plane of the second reflector 300 may be concave curved surfaces, respectively, around the inflection point P. It can be placed on both sides.

In addition, the first inclined surface of the second reflector 300 may include a boundary line in contact with the second inclined surface of the second reflector 300.

Here, as shown in FIG. 7A, the seventh distance value 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. May be greater than the eighth distance value D8 between the first vertical line V1 connecting one point of the boundary line and the fourth vertical line V4 connecting one point of the other end of the first reflector 200.

In this case, the ratio of the seventh distance value D7 and the eighth distance value D8 may be about 1.1-2: 1.

Here, the end of the first reflector 200 means an edge region of the upper surface 200a of the first reflector 200, an edge region of the lower surface 200b of the first reflector 200, and a first reflector ( It may be any one of the side regions between the upper surface 200a and the lower surface 200b of the 200.

The end of the second reflector 300 is an edge region of the upper surface 300a of the second reflector 300, an edge region of the lower surface 300b of the second reflector 300, and a second reflector ( It may be any one of the side regions between the upper surface 300a and the lower surface 300b of the 300.

In some cases, as shown in FIG. 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 the eighth distance value D8 between the first vertical line V1 connecting one point of the boundary line and the fourth vertical line V4 connecting one point of the other end of the first reflector 200.

As another example, as shown in FIG. 7C, a seventh 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 one point of the boundary line and the fourth vertical line V4 connecting one point of the other end of the first reflector 200.

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

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

In addition, 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 an arrangement relationship between the optical member and the first and second reflectors according to the sixth embodiment.

As shown in FIG. 8, 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. It may be arranged at a predetermined interval from 300.

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

In this case, the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and may be inclined in an upward direction, and the second inclined surface of the second reflector 300 may be formed of the second reflector 300. It may be adjacent to the first inclined surface and inclined downward from the first inclined surface of the second reflector 300.

The third inclined surface of the second reflector 300 may be 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, the closer to the second inclined surface of the second reflector 300, the closer to the optical member 600, the farther from the second inclined surface of the second reflector 300. The further, the greater the distance from the optical member 600.

For example, the first inclined plane of the second reflector 300 may be a flat plane, and the second inclined plane and the third inclined plane of the second reflector 300 may be concave curved surfaces, respectively, around the inflection point P. It can be placed on both sides.

In addition, the first inclined surface of the second reflector 300 may include a boundary line in contact with the second inclined surface of the second reflector 300.

Here, as shown in FIG. 8, the angle θ 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 to 80 degrees.

As an example, the angle θ 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 25 to 65 degrees.

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

In addition, 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 cross-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 may be disposed at a predetermined interval.

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

In addition, 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.

And, as shown in Figure 9a, at the end of the second reflector 300, the side surface 300a1 between the upper surface 300a and the lower surface 300b of the second reflector 300, the substrate of the light source module 100 It may be arranged to correspond to a straight line extending from the lower surface (100b1) of (100b).

That is, the light source module 100 includes a light source 100a and a substrate 100b, which is a lower surface facing the upper surface 100b2 and the upper surface 100b2 on which the light source 100a is disposed. It may include the surface (100b1).

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

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

In some cases, as shown in FIG. 9B, at the end of the second reflector 300, the side surface 300a1 between the upper surface 300a and the lower surface 300b of the second reflector 300 is the light source module 100. The substrate 100b may be disposed to correspond to a straight line extending from the upper surface 100b2 of the substrate 100b.

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

Therefore, except for the substrate 100b of the light source module 100, the light source 100a and a part of the first reflector 200 may be disposed to overlap the first inclined surface of the second reflector 300.

In another case, as shown in FIG. 9C, at the end of the second reflector 300, the side surface 300a1 between the upper surface 300a and the lower surface 300b of the second reflector 300 is the light source module 100. It may be arranged to correspond to a straight line extending from the upper surface (100a1) of the light source (100a) of.

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

Thus, except for the light source module 100, a part of the first reflector 200 may be disposed to overlap within the first inclined surface of the second reflector 300.

As such, a portion of the first inclined surface of the second reflector 300 may overlap at least one of the first reflector 200 and the light source module 100.

10A to 10C are cross-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, and the optical member 600 includes the first reflector 200 and The second reflector 300 may be disposed at a predetermined interval.

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

In addition, 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 plane, as shown in FIG. 10A.

In some cases, 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 is convex, as illustrated in FIG. 10C. It may be a curved surface.

11 is a cross-sectional view illustrating second and third inclined surfaces of the second reflector.

As shown in FIG. 11, 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. It may be arranged at a predetermined interval from 300.

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

In this case, the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and may be inclined in an upward direction, and the second inclined surface of the second reflector 300 may be formed of the second reflector 300. It may be adjacent to the first inclined surface and inclined downward from the first inclined surface of the second reflector 300.

The third inclined surface of the second reflector 300 may be 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.

In this case, the second inclined surface and the third inclined surface of the second reflector 300 may be disposed adjacent to each other about the inflection point P.

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 an inclined surface inclined upward.

In addition, 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.

In this case, 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 plane, a concave curved surface, and a convex curved surface.

Meanwhile, the first inclined surface of the second reflector 300 may be a diffuse reflection area that diffusely reflects light, and the second inclined surface of the second reflector 300 may be a specular reflection area that specularly reflects light.

Subsequently, the third inclined surface of the second reflector 300 may be at least one of a diffuse reflection region reflecting light and a specular reflection region reflecting light.

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

As shown in FIG. 12, 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. It may be arranged at a predetermined interval from 300.

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

In this case, the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and may be inclined in an upward direction, and the second inclined surface of the second reflector 300 may be formed of the second reflector 300. It may be adjacent to the first inclined surface and inclined downward from the first inclined surface of the second reflector 300.

The third inclined surface of the second reflector 300 may be 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.

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

In this case, the second inclined surface and the third inclined surface of the second reflector 300 may be disposed adjacent to each other about the first inflection point P1, and the third inclined surface and the fourth inclined surface of the second reflector 300 may be The second inflection point P2 may be disposed adjacent to each other.

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 an inclined surface inclined upward. 4 The inclined surface may be an inclined surface that is bent from the upper direction to the lower direction.

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

In this case, 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.

Meanwhile, the first inclined surface of the second reflector 300 may be a diffuse reflection area that diffusely reflects light, and the second inclined surface of the second reflector 300 may be a specular reflection area that specularly reflects light.

Subsequently, the third inclined plane or the fourth inclined plane of the second reflector 300 may be at least one of a diffuse reflection area that diffusely reflects light and a specular reflection area that specularly reflects light.

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

Here, the supporter 500 serves to support a part of the optical member 600 in order to prevent sagging of the optical member 600, and may be spaced apart from the optical member 600 at a predetermined interval. .

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

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

And, as shown in Figure 13b, the fourth inclined surface of the second reflector 300 may be a concave curved surface having a third radius of curvature R3, as shown in Figure 13c, the second reflector 300 The four inclined surfaces may be convex curved surfaces having a third radius of curvature R3.

As such, the fourth inclined surface of the second reflector may be manufactured to have a smooth shape without protruding regions, thereby reducing a hot spot phenomenon and providing uniform luminance.

14 is a cross-sectional view illustrating an arrangement of the spacer member of FIG. 2.

As shown in FIG. 14, 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. It may be arranged at a predetermined interval from 300.

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

Here, the upper surface 400a of the spacer 400 may contact the optical member 600, and the lower surface 400b of the spacer 400 may contact the first reflector 200.

In this case, the distance D between the upper surface 400a and the lower surface 400b of the spacer 400 may be about 4-12 mm.

In addition, the upper surface 400a of the spacer 400 may have a larger area than the lower surface 400b of the spacer 400.

In addition, the side surface 400c of the spacer member 400 may be an inclined surface, and an 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.

In some cases, the spacer member 400 may be an empty separation member having a hollow shape.

The spacer 400 may include a body portion 400d connected to the spacer 400, and the light source module 100 may be formed at the body 400d of the spacer 400. Can be attached.

In addition, a plurality of heat dissipation protrusions may be disposed on a part of the spacer 400.

As such, the spacer 400 may have an effective gap between the first reflector 200 and the optical member 600, thereby reducing the bezel area of the backlight unit, It may have a heat dissipation function for dissipating heat generated from 100) to the outside.

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

In addition, 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.

Subsequently, the second reflector 300 may include a first inclined plane, a second inclined plane, and a third inclined plane.

Here, the first inclined surface of the second reflector 300 may be adjacent to the light source module 100 and may be inclined in an upward direction, and the second inclined surface of the second reflector 300 may be formed of the second reflector 300. It may be adjacent to the first inclined surface and inclined downward from the first inclined surface of the second reflector 300.

The third inclined surface of the second reflector 300 may be 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, the closer to the second inclined surface of the second reflector 300, the closer to the optical member 600, the farther from the second inclined surface of the second reflector 300. The further, the greater the distance from the optical member 600.

For example, the first inclined plane of the second reflector 300 may be a flat plane, and the second inclined plane and the third inclined plane of the second reflector 300 may be concave curved surfaces, respectively, around the inflection point P. It can be placed on both sides.

15A and 15B are cross-sectional views showing side surfaces of the spacer members.

As shown in FIG. 15A, the upper surface 400a of the spacer 400 may contact the optical member, and the lower surface 400b of the spacer 400 may contact the first reflector.

In this case, the distance D between the upper surface 400a and the lower surface 400b of the spacer 400 may be about 4-12 mm.

In addition, the upper surface 400a of the spacer 400 may have a larger area than the lower surface 400b of the spacer 400.

In addition, the side surface 400c of the spacer member 400 may be an inclined surface, and the angle θ11 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.

In some cases, as shown in FIG. 15B, the side surface 400c of the spacer member 400 may be a vertical plane, and the lower surface 400b of the spacer member 400 and the side surface of the spacer member 400 ( The angle between 400c) may be at right angles.

The spacer 400 may include a body portion 400d connected to the spacer 400, and a light source module may be attached to the body 400d of the spacer 400. have.

16A and 16B are cross-sectional views showing the shape of the spacer member.

As shown in FIG. 16A, the upper surface 400a of the spacer 400 may contact the optical member, and the lower surface 400b of the spacer 400 may contact the first reflector.

In addition, the upper surface 400a of the spacer 400 may have a larger area than the lower surface 400b of the spacer 400.

In addition, the side surface 400c of the spacer member 400 may be an inclined surface, and the angle θ11 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 spacer 400 may be an empty separation member having a hollow shape.

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

The spacer 400 may include a body portion 400d connected to the spacer 400, and a light source module may be attached to the body 400d of the spacer 400. have.

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

That is, in the cross section of the spacer 400, a groove 420 having one side open in the center area may be formed.

As such, when the spacer 400 is an empty separation member having a hollow shape, the weight of the spacer 400 becomes light, so that the overall weight of the backlight unit may be reduced.

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

As shown in FIG. 17A, the upper surface 400a of the spacer 400 may contact the optical member, and the lower surface 400b of the spacer 400 may contact the first reflector.

In addition, the upper surface 400a of the spacer 400 may have a larger area than the lower surface 400b of the spacer 400.

In addition, the side surface 400c of the spacer member 400 may be an inclined surface, and an 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 spacer 400 may be an empty separation member having a hollow shape.

The spacer 400 may include a body portion 400d connected to the spacer 400, and a light source module may be attached to the body 400d of the spacer 400. have.

Subsequently, a plurality of heat dissipation protrusions 450 may be disposed on a portion of the spacer 400.

For example, when the spacer member 400 is an empty separation member having a hollow shape in which one side is opened, the plurality of heat dissipation protrusions 450 may have a groove ( 420 may be disposed.

In some cases, as shown in FIG. 17B, the plurality of heat dissipation protrusions 450 may be disposed in the body part 400d of the spacer 400.

As such, the plurality of heat dissipation protrusions 450 may be a region of the groove 420 of the spacer 400 adjacent to the light source module 100 or the body portion 400d of the spacer 400 adjacent to the light source module 100. By being disposed in, the heat generated from the light source module 100 may be discharged to the outside.

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

As shown in FIG. 18, the upper surface 400a of the spacer 400 is in contact with the optical member 600, and the lower surface 400b of the spacer 400 is in contact with the first reflector 200. Can be.

In addition, the upper surface 400a of the spacer 400 may have a larger area than the lower surface 400b of the spacer 400.

In addition, the side surface 400c of the spacer member 400 may be an inclined surface, and an 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 spacer 400 may include a body portion 400d connected to the spacer 400, and the light source module 100 may be formed at the body 400d of the spacer 400. Can be attached.

Here, a heat dissipation tape may be disposed between the light source module 100 and the body part 400d of the spacer 400.

In addition, the reflective sheet 120 may be disposed on the body portion 400d of the spacer 400.

Here, the reflective sheet 120 may be disposed on the entire surface of the body portion 400d of the spacer 400 except for the region of the light source module 100.

As such, by disposing the reflective sheet 120 on the body portion 400d of the spacer 400, the light efficiency may be increased without losing the light.

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

FIG. 19A is a view showing a light source module 100 disposed at a predetermined distance from the first reflector 200 and the second reflector 300, and FIG. 19B simultaneously shows the first reflector 200 and the second reflector 300. FIG. 19C is a view showing the light source module 100 in contact, and FIG. 19C is a view showing the light source module 100 contacting the first reflector 200 and being spaced apart from the second reflector 300 by a predetermined distance. The light source module 100 disposed at a predetermined distance from the first reflector 200 and in contact with the second reflector 300 is shown.

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 spaced apart from the second reflector 300 by a second distance d32.

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

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

The reason is that when the first distance d31 is greater than the second distance d32, a hot spot may occur.

Subsequently, as shown in FIG. 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 is in contact with the first and second reflectors 200 and 300, thereby preventing hot spots and transmitting light to an area far from the light source module 100, and also the thickness of the entire backlight unit. You can also reduce the

As shown in FIG. 19C, the light source module 100 may be in contact with the first reflector 200 and spaced apart from the second reflector 300 by a distance d.

Here, the light source module 100 may be in contact with the first reflector 200 to prevent hot spots and transmit light to a region far from the light source module 100.

Next, as shown in FIG. 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.

20A to 20D are diagrams illustrating a first reflector having an inclined surface, in which FIG. 20A is a case where the inclined surface is flat, and FIGS. 20B, 20C and 20D are cases where the inclined surface is curved.

20A to 20D, one surface of the first reflector 200 facing the second reflector 300 may have an inclined surface that is inclined at an angle with respect to the other surface of the first reflector 200. have.

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

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

That is, in the first reflector 200, the thickness t1 of the region 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, the light source module 100 The thickness t1 of the region adjacent to) may be greater than the thickness t2 of the region far from the light source module 100.

In some cases, as shown in FIGS. 20C and 20D, 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.

In addition, as shown in FIG. 20D, the first reflector 200 may include both an inclined surface and a 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 surface may be the same as the length L2 of the plane, or may be different from each other in some cases.

In addition, a predetermined reflection pattern may be formed on the surface of the first reflector 200.

21A-21D show a first reflector having a reflective pattern.

21A shows that the reflective pattern 220 is serrated, the surface of the reflective pattern 220 is flat, and FIGS. 21B and 21C show that the reflective pattern 220 is serrated, and the surface of the reflective pattern 220 is curved. Can be.

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

In some cases, as shown in FIG. 21D, the size of the reflective pattern 220 may gradually increase from the end of the first reflector 200 toward the open area.

As described above, the reason why the reflective pattern 220 is formed on the first reflector 200 is because not only the reflection of the light but also the diffusion effect of uniformly spreading the light may be provided.

Therefore, the reflective pattern 220 may be manufactured in various sizes in the corresponding area according to the overall luminance distribution of the backlight.

22 is a perspective view showing an optical member.

As shown in FIG. 22, the optical member 600 may be formed of several layers, and the uneven pattern 620 may be formed on the top layer or the surface of 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.

As such, embodiments may reduce the bezel and thickness of the backlight unit by using an effective gap between the reflector and the optical member.

In addition, the embodiment uses a reflector having an inclined surface, without a light guide plate, by manufacturing a structure having an air guide (light guide), it is possible to provide a light weight, low manufacturing cost, and uniform brightness.

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

In addition, the spacer member, the first, the second reflector, and the light source module described in the above-described embodiments may be implemented as a display device, an indicator device, and a lighting system including the same. It may include.

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 illustrates 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 illustrate a display apparatus according to an embodiment.

Referring to FIG. 24, the display apparatus 1 includes a display module 20, a front cover 30 surrounding the display module 20, a back cover 35, and a driver 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.

On the other hand, as shown in FIG. 25, the driving control unit 55a of the driving unit 55 may be 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 member, the first, the second reflector, and the light source module described in the above-described embodiments may be embodied as a display device, an indicator device, or a lighting system including the same. It may include a lamp, a street lamp.

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 may be combined or modified with respect to other embodiments by those 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: spaced 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,
An optical member disposed at a predetermined distance from the first reflector and the second reflector,
A first distance value between a first horizontal line connecting one point of the end portion of the optical member and a second horizontal line connecting a point of the end portion of the first reflector, and an end of the optical member ( and a ratio of the second distance value between the first horizontal line connecting one point of the end portion and the third horizontal line connecting one point of the end portion of the second reflector is 1: 1.5-4. The backlight unit of claim 1, wherein an upper surface of the first reflector and a lower surface of the optical member face each other and are parallel to each other. The backlight unit of claim 1, wherein the lower surface of the first reflector and the upper surface of the second reflector face each other and are not parallel to each other. The method of claim 1, wherein the second reflector,
A first inclined surface adjacent to the light source module and inclined upwardly;
A second inclined surface adjacent to the first inclined surface and inclined downward from the first inclined surface;
And a third inclined surface adjacent to the second inclined surface and inclined in an upward direction from the second inclined surface. The method of claim 4, wherein the first inclined surface of the second reflector,
The closer to the second inclined surface of the second reflector, the closer to the optical member,
The further away from the second inclined surface of the second reflector, the backlight unit away from the optical member. The method of claim 4, wherein the first inclined surface of the second reflector,
A boundary line in contact with the second inclined surface of the second reflector,
The third distance value between the fourth horizontal line connecting one point of the boundary line and the third horizontal line connecting one point of the end portion of the second reflector is the first connecting the point of the end of the optical member. And a first distance value smaller than a first distance value between a horizontal line and a second horizontal line connecting one end of the first reflector. The method of claim 4, wherein the first inclined surface of the second reflector,
A boundary line in contact with the second inclined surface of the second reflector,
A fourth distance value between a fourth horizontal line connecting one point of the boundary line and a fifth horizontal line connecting a fifth axis of the light source module of the light source module includes a second horizontal line connecting one point of the end of the first reflector and the light source. The backlight unit is greater than a fifth distance value between the fifth horizontal line connecting the central axis of the light source of the module. The method of claim 4, wherein the first inclined surface of the second reflector,
A boundary line in contact with the second inclined surface of the second reflector,
And a fourth horizontal line connecting one point of the boundary line and an angle between the first inclined plane of the second reflector is 10 to 80 degrees. The backlight unit of claim 4, 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. The backlight unit of claim 4, wherein the first inclined plane of the second reflector is a diffuse reflection area that diffusely reflects light, and the second inclined plane of the second reflector is a specular reflection area that specularly reflects light. The backlight unit of claim 4, further comprising a fourth inclined surface adjacent to the third inclined surface. The backlight unit of claim 11, wherein the fourth inclined surface is disposed with the at least one supporter. 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 predetermined distance from the first reflector and the second reflector,
A separation member is disposed between the optical member and the first reflector,
An upper surface of the spacer is in contact with the optical member,
A lower surface of the spacer is in contact with the first reflector,
The distance between the upper surface and the lower surface of the spacer member is 4 to 12mm. The backlight unit of claim 13, wherein an upper surface of the spacer has a larger area than a lower surface of the spacer. The backlight unit of claim 13, wherein a side surface of the spacer is an inclined surface. The backlight unit of claim 13, wherein the spacer is an empty separation member having a hollow shape. The method of claim 13, wherein the second reflector,
A first inclined surface adjacent to the light source module and inclined upwardly;
A second inclined surface adjacent to the first inclined surface and inclined downward from the first inclined surface,
A portion of the first inclined surface overlaps the spacer. 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 predetermined distance from the first reflector and the second reflector,
The second reflector,
A central region facing the optical member,
Disposed on both sides of the central region, the peripheral region adjacent to the first reflector and the light source module;
The peripheral area of the second reflector,
The closer to the center region of the second reflector, the inclined surface is closer to the optical member,
The distance between the vertical line connecting one point of one end of the inclined surface and the vertical line connecting one point of the other end of the inclined surface is a vertical line connecting one point of one end of the first reflector and the other end of the first reflector. Backlight unit larger than the distance between the vertical lines connecting one point. The backlight unit of claim 1, wherein an air guide is formed in a space between the second reflector and the optical member. 19. An illumination system comprising the backlight unit of any of claims 1-18.

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