KR101850429B1 - backlight unit and display apparatus using the same - Google Patents

backlight unit and display apparatus using the same Download PDF

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Publication number
KR101850429B1
KR101850429B1 KR1020110041495A KR20110041495A KR101850429B1 KR 101850429 B1 KR101850429 B1 KR 101850429B1 KR 1020110041495 A KR1020110041495 A KR 1020110041495A KR 20110041495 A KR20110041495 A KR 20110041495A KR 101850429 B1 KR101850429 B1 KR 101850429B1
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KR
South Korea
Prior art keywords
reflector
light source
display device
disposed
device according
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KR1020110041495A
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Korean (ko)
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KR20120123887A (en
Inventor
고세진
박성용
김성호
Original Assignee
엘지이노텍 주식회사
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Priority to KR1020110041495A priority Critical patent/KR101850429B1/en
Priority claimed from TW100120223A external-priority patent/TWI465808B/en
Publication of KR20120123887A publication Critical patent/KR20120123887A/en
Application granted granted Critical
Publication of KR101850429B1 publication Critical patent/KR101850429B1/en

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    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/0066Reflectors for light sources specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/04Optical design
    • F21V7/09Optical design with a combination of different curvatures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/10Construction
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/005Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055Reflecting element, sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553Reflecting elements
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/34Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 reflector
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00Function characteristic
    • G02F2203/02Function characteristic reflective

Abstract

The present invention relates to a backlight unit and a display device using the same, and more particularly, to a backlight unit and a display device using the same, which includes a first reflector, a second reflector having an inclined surface on a part thereof and a plurality of light sources disposed between the first and second reflectors. And a third reflector disposed between the light sources.

Description

BACKLIGHT UNIT AND DISPLAY APPARATUS USING THE SAME

An embodiment relates to a backlight unit and a display device using the same.

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

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

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

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

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

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

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

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

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

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

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

Embodiments provide a backlight unit having a uniform brightness and an air guide by arranging a reflector between adjacent light sources, and a display device using the backlight unit.

An embodiment includes a first reflector, a second reflector having a partial inclined surface, a plurality of light sources disposed between the first and second reflectors, and a light source disposed between the light sources. And a third reflector.

Here, the third reflector may be spaced apart from the first reflector by a first distance, and may be spaced by a second distance from the second reflector, and the first distance and the second distance may be different from each other.

And, the third reflector may be in contact with the first reflector and be spaced apart from the second reflector, or the third reflector may be in contact with the first reflector and the second reflector.

One or a plurality of third reflectors may be disposed between the adjacent light sources and the light sources, or one or more light sources may be disposed between the adjacent third reflectors.

Next, the third reflector may include first and second segments disposed on both sides of the light source, and a third segment connected to the first and second segments and disposed between the first reflector and the light source.

The third reflector may be arranged to surround the light source.

Further, the third reflector may overlap the first reflector, and the third reflector may partially overlap the first reflector.

Then, the inclined surface of the second reflector may be inclined at an angle with respect to the surface of the first reflector, and the inclined surface of the second reflector may overlap with the first reflector.

And, the second reflector may include at least one inclined surface and at least one flat surface, and the plane of the second reflector may be a plane parallel to the first reflector.

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

In addition, the embodiment includes a first reflector, a second reflector having a partial inclined surface, a light source arranged between the first and second reflectors and having a plurality of light sources arranged on the substrate, A light source module, and a third reflector disposed between the light sources and projecting from the substrate.

Embodiments can be achieved by disposing a light source module between the first reflector and the second reflector and arranging a third reflector between the light sources of the light source module so that the light weight can be mass produced and the uniform brightness can be provided It is possible to provide a backlight unit for an air guide.

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

Figs. 1A to 1C are views for explaining a backlight unit according to an embodiment
FIGS. 2A to 2C are views showing a distance relation between the third reflector and the first and second reflectors; FIG.
Figs. 3A and 3C are diagrams for comparing the lengths of the third reflector and the first reflector, which are spaced apart from the second reflector
Figs. 4A and 4C are views for comparing the lengths of the third reflector and the first reflector, which are in contact with the second reflector; Figs.
5A to 5C are views showing a light source disposed between third reflectors
6A to 6C are views showing a light source module disposed between third reflectors
7A and 7B are diagrams showing a distance relationship between the third reflector and the light source
8A to 8E are views showing a third reflector having various shapes of side surfaces
9A to 9C are views showing a third reflector having various lengths
10A to 10D are views showing a third reflector having various reflection patterns
11 is a view showing a third reflector having a mirror surface
12A to 12D are views showing a third reflector having a reflecting member
13A and 13B are diagrams showing a third reflector including a regular reflection area and a diffuse reflection area
14A and 14B are views showing a third reflector including an opaque region and a transmissive region;
15 is a view showing a third reflector having an open shape
16 is a view showing a third reflector having a closed shape
Figs. 17A to 17C are views showing a second reflector including an inclined plane and a plane
18A to 18C are views showing a second reflector including a plurality of inclined surfaces
19 is a view showing a second reflector including a regular reflection area and a diffuse reflection area
20A is a view showing a second reflector of one edge type
20B is a view showing a second reflector of a two edge type
20C and 20D are views showing a second reflector of four edge type
21 is a view showing a backlight unit including an optical member
22 is a view showing an example of the shape of the optical member
23 is a view showing a reinforcing rib formed on the lower surface of the second reflector
24 is a view showing a support pin formed on the upper surface of the second reflector
25 is a view showing a display module having a backlight unit according to an embodiment
26 and 27 are views showing a display device according to the embodiment

Hereinafter, embodiments will be described with reference to the accompanying drawings.

In the description of the present embodiment, in the case of being described as being formed "on or under" of each element, the upper (upper) or lower (lower) on or under includes both the two elements being directly in contact with each other or one or more other elements being indirectly formed between the two elements.

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

1A to 1C are views for explaining a backlight unit according to an embodiment, wherein FIG. 1A is a sectional view, FIG. 1B is a bottom perspective view, and FIG. 1C is a plan view.

1A to 1C, the backlight unit includes a light source module 100 including at least one first light source 110 and a circuit board 120, a first reflector 200, A reflector 300 and a third reflector 400. [

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

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

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

The light source module 100 may include a circuit board 120 having an electrode pattern and a light source 110 for generating light.

At this time, at least one light source 110 may be mounted on the circuit board 120, and an electrode pattern may be formed to connect an adapter for supplying power to the light source 110.

For example, on the top surface of the circuit board 120, an electrode pattern such as carbon nanotubes for connecting the light source 110 and the adapter may be formed.

The circuit board 120 may be a printed circuit board (PCB) on which a plurality of light sources 110 are mounted, such as polyethylene terephthalate (PET), glass, polycarbonate (PC) . ≪ / RTI >

The circuit board 120 may be a single layer PCB, a multilayer PCB, a ceramic substrate, a metal core PCB, or the like.

The light source 110 may be a light emitting diode (LED) chip. The light emitting diode chip may be a blue LED chip or an ultraviolet LED chip, or may be a red LED chip, a green LED chip, a blue LED chip, ) LED chip, or a white LED chip.

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

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

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

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

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

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

The inclined surface of the second reflector 300 may be overlapped with at least one of the light source module 100 and the first and third reflectors 200 and 400.

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

Optionally, the second reflector 300 may include at least one inclined surface and at least one flat surface, wherein the plane of the second reflector 300 is parallel to the first reflector 200, It can be a parallel side.

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

Next, the third reflector 400 may be disposed between the light sources 110 of the light source module 100.

The third reflector 400 may be formed of a reflective coating film and a reflective coating material layer to guide the light generated from the light source module 100 to a central region of the second reflector 300 .

That is, the third reflector 400 can guide the light so as to compensate the luminance of the area distant from the light source module 100.

The third reflector 400 may be spaced apart from the first reflector 200 and the second reflector 300 at a predetermined interval or may be simultaneously contacted to the first reflector 200 and the second reflector 300. [

Alternatively, the third reflector 400 may be disposed apart from the second reflector 300 at the same time when the first reflector 200 contacts the first reflector 300, or may be disposed apart from the first reflector 200 As shown in FIG.

Figs. 2A to 2C are diagrams showing a distance relationship between the third reflector and the first and second reflectors. Fig.

2A is a view showing a third reflector 400 disposed at a predetermined distance from the first reflector 200 and the second reflector 300. FIG 2B is a view showing a state where the first reflector 200 and the second reflector 300 3C is a view showing a third reflector 400 contacting the first reflector 200 and the second reflector 300 at the same time. FIG. 2C is a view showing a third reflector 400 disposed at a predetermined distance from the first reflector 200 and the second reflector 300. FIG.

2A, the third reflector 400 protrudes from the circuit board 120 of the light source module 100 and may be positioned between the light source 110 and the light source 110.

The third reflector 400 may be spaced apart from the first reflector 200 by a first distance d1 and by a second distance d2 from the second reflector 300. [

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

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

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

2B, the third reflector 400 may be in contact with the first reflector 200 and may be spaced apart from the second reflector 300 by a distance d.

Here, the third reflector 400 contacts the first reflector 200, thereby preventing hot spots and transmitting light to a region far from the light source module 100. [

Next, as shown in FIG. 2C, the third reflector 400 may be in contact with the first reflector 200 and the second reflector 300.

Here, the lower surface of the third reflector 400, which is in contact with the second reflector 300, may have an inclined surface having the same shape as the inclined surface of the second reflector 300.

As such, the third reflector 400 may protrude from the circuit board 120 of the light source module 100 by a predetermined length.

That is, the length of the third reflector 400 may be smaller than the length of the first reflector 200, although the length of the third reflector 400 may overlap the first reflector 200, as shown in FIGS.

In some cases, the length of the third reflector 400 may be greater than or equal to the length of the first reflector 200. [

Figs. 3A and 3C are diagrams comparing the lengths of the third reflector and the first reflector, which are spaced apart from the second reflector.

3A, 3B, and 3C are diagrams showing the degree to which the length of the third reflector 400 overlaps with the first reflector 200. FIG.

The third reflector 400 protrudes from the circuit board 120 of the light source module 100 and may be positioned between the light source 110 and the light source 110 as shown in FIG.

The third reflector 400 protrudes from the circuit board 120 of the light source module 100 by a length L2 and can be superimposed on the first reflector 200. [

Here, the length L2 of the third reflector 400 may be smaller than the length L1 of the first reflector 200. [

That is, the edge portion E2 of the third reflector 400 may be positioned on the lower surface of the first reflector 200 having a certain distance from the edge region E1 of the first reflector 200. [

3B, the third reflector 400 protrudes from the circuit board 120 of the light source module 100 by a length L2 and may be superimposed on the first reflector 200. As shown in FIG.

Here, the length L2 of the third reflector 400 may be smaller than the length L1 of the first reflector 200, and the edge portion E2 of the third reflector 400 and the edge portion E2 of the first reflector 200 The region E1 can be formed in a straight line.

3C, the third reflector 400 protrudes from the circuit board 120 of the light source module 100 by a length L2, and may be partially overlapped with the first reflector 200. As shown in FIG.

The length L2 of the third reflector 400 may be equal to or greater than the length L1 of the first reflector 200 or the length L1 of the first reflector 200. [

That is, the edge portion E1 of the first reflector 200 can be formed at a certain distance from the edge region E2 of the third reflector 400. [

As such, the third reflector 400 spaced apart from the second reflector 300 can be formed in various lengths.

The third reflector 400 may be formed to be in contact with the second reflector 300. The third reflector 400 contacting the second reflector 300 may have various lengths.

FIGS. 4A, 4B and 4C are views for comparing the lengths of the third reflector and the first reflector, which are in contact with the second reflector.

4A, the third reflector 400 is formed to be in contact with the second reflector 300, is protruded by a length L2 from the circuit board of the light source module 100, overlapped with the first reflector 200, .

Here, the length L2 of the third reflector 400 may be smaller than the length L1 of the first reflector 200. [

That is, the edge portion E2 of the third reflector 400 may be positioned on the lower surface of the first reflector 200 having a certain distance from the edge region E1 of the first reflector 200. [

4B, the third reflector 400 protrudes from the circuit board 120 of the light source module 100 by a length L2, and may be superimposed on the first reflector 200. As shown in FIG.

Here, the length L2 of the third reflector 400 may be smaller than the length L1 of the first reflector 200, and the edge portion E2 of the third reflector 400 and the edge portion E2 of the first reflector 200 The region E1 can be formed in a straight line.

4C, the third reflector 400 protrudes from the circuit board 120 of the light source module 100 by a length L2, and may be partially overlapped with the first reflector 200. As shown in FIG.

The length L2 of the third reflector 400 may be equal to or greater than the length L1 of the first reflector 200 or the length L1 of the first reflector 200. [

That is, the edge portion E1 of the first reflector 200 may be located on the upper surface of the third reflector 400 having a certain distance from the edge region E2 of the third reflector 400. [

The shape of the lower surface of the third reflector 400 may be the same as that of the second reflector 300 so that the third reflector 400 is in contact with the second reflector 300.

One or a plurality of light sources may be disposed between the third reflectors 400 adjacent to each other.

5A to 5C are views showing a light source disposed between the third reflectors.

5A is a view illustrating a state in which one light source 110 is disposed between adjacent third reflectors 400. FIG. 5B is a view illustrating a state where two light sources 110 are disposed between adjacent third reflectors 400. FIG. And FIG. 5C is a view in which three light sources 110 are disposed between third reflectors 400 adjacent to each other.

5A to 5C, the third reflector 400 protrudes from the circuit board 120 of the light source module 100 and may be positioned between the light source 110 and the light source 110.

5A, one light source 110 may be disposed between the adjacent third reflectors 400, and a plurality of light sources 110 may be disposed as shown in FIGS. 5B and 5C .

In some cases, the number of the light sources 110 disposed between the adjacent third reflectors 400 may not be constant.

For example, one light source 110 may be disposed between the pair of third reflectors 400, and two light sources 110 may be disposed between the pair of third reflectors 400 .

The number of the light sources 110 disposed between any pair of third reflectors 400 may be different from the number of the light sources 110 disposed between the pair of third reflectors 400 .

In addition, one or more light source modules 100 may be disposed between the adjacent third reflectors 400.

That is, the third reflector 400 may be fixed by the circuit board 120 of the light source module 100, but may be fixed by an external supporting frame.

6A to 6C are views showing a light source module disposed between third reflectors.

6A is a view illustrating the arrangement of a light source module 100 including one light source 110 between adjacent third reflectors 400. FIG. 6C is a view illustrating a light source module 100 including three light sources 110 between adjacent third reflectors 400. The light source module 100 includes two light sources 110, FIG.

6A to 6C, the third reflector 400 is fixed by an external support frame (not shown) and protrudes from an external support frame, and the light source module 100 and the light source module 100 ). ≪ / RTI >

6A, a light source module 100 including one light source 110 may be disposed between the adjacent third reflectors 400, and as shown in FIGS. 6B and 6C, The light source module 100 including the light source module 110 may be disposed.

In some cases, the number of the light sources 110 of the light source module 100 disposed between the adjacent third reflectors 400 may not be constant.

For example, a light source module 100 having one light source 110 is disposed between a pair of third reflectors 400, and two light sources 110 are disposed between the pair of third reflectors 400 110 may be disposed.

In this way, the third reflector 400 can be fixed by an external supporting frame, and the light source module 100 can be disposed between the third reflectors 400.

The number of the light sources 110 of the light source module 100 disposed between any pair of the third reflectors 400 is the same as the number of the light source modules 100 disposed between the pair of third reflectors 400. [ The number of light sources 110 may be different.

When the third reflector 400 is fixed by the circuit board 120 of the light source module 100, the third reflector 400 may be disposed at a predetermined distance from the light source 110 or may be disposed in contact with the light source 110 .

7A and 7B are diagrams showing a distance relation between the third reflector and the light source.

7A is a view in which the third reflector 400 is disposed apart from the light source 110 by an interval d11, and FIG. 7B is a view in which the third reflector 400 is disposed in contact with the light source 110. FIG.

7A, the third reflector 400 is fixed by the circuit board 120 of the light source module 100, and between the third reflectors 400 adjacent to each other, a light source of the light source module 100 (110) may be disposed.

Here, the third reflector 400 may be spaced apart from the light source 110 by a predetermined distance d11.

7B, the third reflector 400 may be arranged close to or in contact with the light source 110. In this case,

Here, one or a plurality of third reflectors 400 may be disposed between the adjacent light sources 110 and the light sources 110.

The reason why the distance between the third reflector 400 and the light source 110 is adjusted is that the smaller the distance between the third reflector 400 and the light source 110 is, This is because it can increase.

Therefore, according to the design of the backlight unit, the interval between the third reflector 400 and the light source 110 can be appropriately adjusted to provide the brightness with the optimal uniformity.

The side of the third reflector 400 facing the light source 110 may be formed into various shapes so as to transmit light to a region far from the light source module 100.

8A-8E illustrate a third reflector having various shapes of sides.

8A is a view showing a third reflector having the same thickness as a region adjacent to the light source 110 and a region farther from the light source 110. FIGS. 8B to 8E are views showing a region adjacent to the light source 110 and distant from the light source 110 And a third reflector having a different thickness of the region.

As shown in FIG. 8A, the side surfaces of the third reflector 400 may face the side surfaces of the adjacent third reflectors 400, and may be parallel to each other.

The thickness t0 of the third reflector 400 may be equal to the thickness of the region adjacent to the light source 110 and the region farther from the light source 110. [

8B, the side surface 401 of the third reflector 400 faces the side surface 401 of the adjacent third reflector 400, and may not be parallel to each other.

Here, the side surface 401 of the third reflector 400 may be a flat inclined surface.

The thickness t2 of the third reflector 400 adjacent to the light source 110 may be greater than the thickness t1 of the region far from the light source 110. [

Next, as shown in FIG. 8C, the side surface 401 of the third reflector 400 faces the side surface 401 of the adjacent third reflector 400, and may not be parallel to each other.

Here, the side surface 401 of the third reflector 400 may be a concave inclined surface.

The thickness of the third reflector 400 may gradually decrease from a region adjacent to the light source 110 to an area farther from the light source 110.

8D, the side surface 401 of the third reflector 400 faces the side surface 401 of the adjacent third reflector 400, and may not be parallel to each other.

Here, the side surface 401 of the third reflector 400 may be a convex inclined surface.

The thickness of the third reflector 400 may gradually decrease from a region adjacent to the light source 110 to an area farther from the light source 110.

Next, as shown in FIG. 8E, the side surface 401 of the third reflector 400 faces the side surface 401 of the adjacent third reflector 400, and may not be parallel to each other.

Here, the side surface 401 of the third reflector 400 may be a stepped surface.

The thickness t2 of the third reflector 400 adjacent to the light source 110 may be greater than the thickness t1 of the region far from the light source 110. [

In addition, the plurality of third reflectors 400 may all have the same length, and some of the third reflectors 400 may have different lengths.

9A to 9C are views showing a third reflector having various lengths.

9A shows the third reflector 400 located at the edge region of the light source module 100 and the third reflector 400 located at the central region of the light source module 100 are the same in length. The length of the third reflector 400 positioned in the edge region of the module 100 and the length of the third reflector 400 located in the central region of the light source module 100 are different. The length from the third reflector 400 located in the edge region to the third reflector 400 located in the central region of the light source module 100 decreases.

9A, the plurality of third reflectors 400 may be fixed by the circuit board 120 of the light source module 100, and may be protruded by a length L11.

Here, the lengths of all the third reflectors 400 may be the same.

That is, the lengths of the third reflector 400 located in the edge region of the light source module 100 and the third reflector 400 positioned in the central region of the light source module 100 may be the same.

9B, the third reflector 400 positioned at the edge region of the light source module 100 is protruded from the circuit board 120 by a length L11, and is disposed in the center region of the light source module 100, The third reflector 400 positioned on the circuit board 120 may protrude from the circuit board 120 by a length L12.

The length L11 of the third reflector 400 located in the edge region of the light source module 100 may be longer than the length L12 of the third reflector 400 located in the central region of the light source module 100. [

This is because the loss of light is reduced in the edge region of the backlight unit, the light is concentrated in the central region of the backlight unit, and the weak luminance is compensated, thereby providing uniformly uniform brightness.

9C, the third reflector 400 positioned at the edge region of the light source module 100 is disposed so as to protrude from the circuit board 120 by a length L11. The third reflector 400 protrudes from the central region of the light source module 100, The third reflector 400 disposed on the circuit board 120 protrudes by a length L14 from the circuit board 120 and the third reflector 400 disposed between the third reflector 400 protrudes from the circuit board 120 by lengths L12 and L13 have.

The length of the third reflector 400 gradually increases from the third reflector 400 positioned at the edge region of the light source module 100 to the third reflector 400 positioned at the center region of the light source module 100, .

This is because the loss of light is reduced in the edge region of the backlight unit, the light is concentrated in the central region of the backlight unit, and the weak luminance is compensated, thereby providing uniformly uniform brightness.

Further, the third reflector 400 may have various reflection patterns on its side surfaces.

10A to 10D are views showing a third reflector having various reflection patterns.

10A and 10C show that the reflective pattern 480 has a saw tooth shape and the reflective pattern 480 has a serrated surface and the reflective pattern 480 has a flat surface. .

Here, FIG. 10B shows a concave curved surface of the reflective pattern 480, and FIG. 10C shows a convex curved surface of the reflective pattern 480.

In some cases, the size of the reflection pattern 480 may gradually increase from one end of the third reflector 400 to the other end as shown in FIG. 10D.

The reason why the reflective pattern 480 is formed on the third reflector 400 in this manner is that it can not only reflect the light but also has a diffusion effect for uniformly spreading the light.

Accordingly, such a reflection pattern 480 can be manufactured in various sizes in the corresponding region according to the entire luminance distribution of the backlight.

On the other hand, the third reflector may be formed by using a material which can be injected, a mirror surface may be formed, or a reflective layer or a reflective sheet may be formed on the body.

11 is a view showing a third reflector having a mirror surface.

As shown in FIG. 11, the surface of the third reflector 400 facing the light source 110 may be a mirror surface.

Here, the body of the third reflector 400 may be made of a polymer resin capable of injection molding, or may be made of a metal or a metal oxide.

The mirror surface of the third reflector 400 can be fabricated by polishing or the like, and can have a reflectance of about 60-99%.

12A to 12D are views showing a third reflector having a reflecting member.

12A and 12B are views showing the reflective member 490 formed on the entire surface of the third reflector 400. FIG. 12A shows a case where the total reflectance of the reflective member is constant, FIG. 12B shows a case where the total reflectance of the reflective member is constant .

12A and 12B, the reflective member 490 may be formed in the form of a film or a sheet, adhered to the body of the third reflector 400, Or may be formed by depositing or coating on the body of the light emitting device 400 or by printing a reflective material in an ink form.

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

The reflecting member 490 may include at least one of a metal or a metal oxide and may have a high reflectance such as aluminum (Al), silver (Ag), gold (Ag), or titanium dioxide (TiO 2 ) Or a metal oxide.

The third reflector 400 may include a reflecting member 490 having one reflectance such that the entire area has the same reflectance as in FIG. 12A, and the reflectance And may include different first and second reflecting members 490a and 490b.

Here, the first reflecting member 490a adjacent to the light source 110 may have a higher reflectance than the second reflecting member 490b.

This is because the light emitted from the light source 110 can be transmitted to a region farther from the light source 110.

12C and 12D show a case where a reflective member 490 is formed on a part of the surface of the third reflector 400. FIG 12C shows a case where a reflective member is formed on the surface of the third reflector 400, And a reflective member is formed in the groove of the reflector 400.

12C and 12D, the reflecting member 490 may be formed in only a part of the third reflector 400. [

12C, the reflective member 490 may protrude from a part of the surface of the third reflector 400, and a groove may be formed on a part of the surface of the third reflector 400, And the reflective member 490 may be filled in the groove.

Also, the third reflector 400 may include a specular reflection region and a diffusive reflection region.

FIGS. 13A and 13B are views showing a third reflector including a regular reflection region and a diffuse reflection region, wherein FIG. 13A is a plan view and FIG. 13B is a cross-sectional view.

As shown in FIGS. 13A and 13B, the third reflector 400 may include a specular reflection area 450 and a scattered reflection area 460.

Here, the regular reflection region 450 serves to regularly reflect the incident light, and the diffusive reflection region 460 may perform a role of irregular reflection of the incident light.

In this case, the regular reflection region 450 may be disposed adjacent to the light source 110, and the irregular reflection region 460 may be disposed in a region distant from the light source 110.

The reason for this is that the regular reflection area 450 of the third reflector 400 can transmit the light emitted from the light source 110 to a region farther from the light source 110 and the diffused reflection area 460 of the third reflector 400 ) Can diffuse light to provide a uniform luminance.

Thus, the regular reflection area 450 and the diffusive reflection area 460 of the third reflector 400 can be manufactured by polishing the surface of the third reflector, or by forming a reflection member.

In addition, the third reflector 400 may include an opaque region and a transmissive region.

Figs. 14A and 14B are views showing a third reflector including an opaque region and a transmissive region, wherein Fig. 14A is a plan view and Fig. 14B is a cross-sectional view.

As shown in FIGS. 14A and 14B, the third reflector 400 may include an opaque region 410 and a transmissive region 420.

Here, the opaque region 410 reflects incident light, and the transmissive region 420 partially reflects the incident light, and partially transmits and refracts the incident light.

At this time, the non-transmissive region 410 may be disposed adjacent to the light source 110, and the transmissive region 420 may be disposed at a region distant from the light source 110.

The reason for this is that the non-transmissive area 410 of the third reflector 400 can transmit the light emitted from the light source 110 to a region farther from the light source 110 and the transmissive area 410 of the third reflector 400 420 may partly reflect, partially transmit and refract light to provide uniform brightness.

As described above, the non-transmissive area 410 and the transmissive area 420 of the third reflector 400 may be formed using an opaque material or a transparent material, or may be formed by attaching an opaque reflective material to the body of the transparent material have.

Meanwhile, the third reflector may be manufactured in various shapes.

FIG. 15 is a view showing a third reflector having an open shape, and FIG. 16 is a view showing a third reflector having a closed shape.

15, the third reflector 400 may surround the light source 110 of the light source module 100 and may have a shape in which an area facing the second reflector 300 is open.

The third reflector 400 may include first, second, and third segments 400a, 400b, and 400c.

Here, the first and second segments 400a and 400b are disposed on both sides of the light source 110, the third segment 400c is connected to the first and second segments 400a and 400b, the first reflector 200 And the light source 110. The light source 110 may be a light source.

At this time, the third segment 400c may be in contact with the first reflector 200 partially.

16, the third reflector 400 may have a circular shape or a polygonal shape in a closed shape so as to surround the light source 110 of the light source module 100. As shown in FIG.

Meanwhile, the second reflector 300 may include at least one inclined surface and at least one flat surface.

Here, the inclined surface of the second reflector 300 may be inclined at an angle with respect to the first reflector 200, and the plane of the second reflector 300 may be parallel to the first reflector 200.

The inclined surface of the second reflector 300 may be overlapped with at least one of the light source 110 and the first reflector 200.

17A to 17C are views showing a second reflector including an inclined plane and a plane.

As shown in Fig. 17A, the second reflector 300 has a sloped surface having a flat surface, and has a curved surface with a concave sloped surface as shown in Fig. 17B, and a curved surface with a sloped surface having a convex shape as shown in Fig. 17C.

Here, the first reflector 400 may overlap the slope of the second reflector 300.

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

18A to 18C are views showing a second reflector including a plurality of inclined surfaces.

FIG. 18A shows that the two inclined surfaces adjacent to each other have a flat surface, the inclination of the two inclined surfaces may be different from each other, FIG. 18B shows that the two inclined surfaces adjacent to each other have concave curved surfaces, the curvatures of the two inclined surfaces may be different from each other, Two curved surfaces adjacent to each other have convex curved surfaces, and curvatures of the two curved surfaces may be different from each other.

Here, the first reflector 400 may overlap the slope of the second reflector 300.

As such, the inclined surface of the second reflector 300 may be at least one of a concave surface, a convex surface, and a flat surface.

Next, the second reflector 300 may include a specular reflection area and a scattered reflection area.

Here, the regular reflection area serves to regularly reflect incident light, and the diffuse reflection area may serve to diffuse incident light, and the light reflectance of the regular reflection area and the diffused reflection area may be about 50 - 99.99%.

The inclined surface of the second reflector 300 may be a regular reflection area as a whole area, or may be a regular reflection area only as a partial area.

19 is a view showing a second reflector including a regular reflection area and a diffuse reflection area.

19, the second reflector 300 may include a regular reflection area adjacent to the light source module 100 and a diffusive reflection area away from the light source module 100. [

The regular reflection area 300a may occupy about 5 to 50% of the entire area of the second reflector 300. [

In some cases, in the second reflector 300, the regular reflection area 300a may occupy about 20-30% of the entire area of the second reflector 300. [

In the second reflector 300, the area ratio of the regular reflection area 300a to the irregular reflection area 300b may be 1: 1 to 20.

The reason why the area ratio between the regular reflection area 300a and the irregular reflection area 300b of the second reflector 300 is determined is that the difference in luminance between the area adjacent to the light source 110 and the area far from the light source 110 To reduce it.

That is, the second reflector 300 can provide a uniform luminance as a whole by appropriately adjusting the area ratio between the regular reflection area 300a and the irregular reflection area 300b.

The second reflector 300 may include a metal or metal oxide having a high reflectivity such as aluminum (Al), silver (Au), gold (Au), titanium dioxide (TiO 2 ) The reflector 300 may have different materials formed in the regular reflection region 300a and the irregular reflection region 300b and may have different surface roughnesses in the regular reflection region 300a and the irregular reflection region 300b.

That is, in the second reflector 300, the regular reflection area 300a and the irregular reflection area 300b may be formed of the same material, and the surface roughness may be different from each other.

Alternatively, in the second reflector 300, the regular reflection area 300a and the irregular reflection area 300b may be formed of different materials, and the surface roughness may be different from each other.

At least one of the light source 110 and the first and third reflectors 200 and 400 may overlap with the regular reflection area 300a.

That is, at least one of the first and second reflectors 200 and 400 may be partially overlapped or partially overlapped in the regular reflection area 300a of the second reflector 300.

The regular reflection area 300a of the second reflector 300 is located adjacent to the light source module 100 and reflects the light emitted from the light source 110 to the central area of the second reflector 300, The irregular reflection region 300b of the second reflector 300 is located in the central region of the second reflector 300 and can diffuse the incident light.

Meanwhile, the second reflector can be manufactured in various shapes according to the arrangement of the light source module and the third reflector.

FIG. 20A is a view showing a second reflector of one edge type, FIG. 20B is a view showing a second reflector of a two edge type, FIGS. 20C and 20D are views showing a four edge type four edge type second reflector.

20A is a plan view showing a second reflector of one edge type. As shown in FIG. 20A, a light source module 100 is disposed on one side of a first reflector 300 of one edge type, The third reflector 400 may be disposed between the light sources 110 of the light source module 100.

20B is a plan view showing a second edge type second reflector. As shown in FIG. 20B, the light source module 100 is disposed on both sides of the second edge type second reflector 300, (400) may be disposed between the light sources (110) of the light source module (100).

20C is a plan view showing a second reflector of four edge type. As shown in FIG. 20C, the second edge of the second reflector 300 has a four-sided light source module 100 And the third reflector 400 may be disposed between the light sources 110 of the light source module 100. [

20D is a plan view showing a second reflector of a four edge type. As shown in FIG. 20D, the second reflector 300 of the four-edge type includes a light source module 100 in a four- And the third reflector 400 may be disposed between the light sources 110 of the light source module 100.

Further, the backlight unit according to the embodiment may further include an optical member disposed at a predetermined interval from the second reflector, and an air guide may be formed in a space between the second reflector and the optical member. have.

FIG. 21 is a view showing a backlight unit including an optical member, and FIG. 22 is a view showing an example of the shape of an optical member.

As shown in Fig. 21, the optical member 600 may be disposed in the open region of the first reflector 200, and may have a concave-convex pattern 620 on its upper surface.

Here, the optical member 600 is for diffusing light emitted through the open region of the first reflector 200, and forms an uneven pattern 620 on the upper surface of the diffusion sheet 600 to increase the diffusion effect can do.

The concave-convex pattern 620 may have a strip shape disposed along the light source module 100, as shown in FIG.

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, 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 backlight unit further improves the brightness and can provide the uniform brightness by disposing the third reflector between the light sources of the light source module.

On the other hand, in this embodiment, the light exit surface of the light source module may be arranged in various directions.

That is, the light source module may have a direct emitting type structure in which the light exit surface is disposed so as to face the air guide direction between the optical member and the second reflector, and the light source module has a light exit surface, 2 reflector and the cover plate direction so as to face each other.

Here, in the indirect emission type light source module, the emitted light is reflected on the first reflector, the second reflector, and the cover plate, and the reflected light can again travel in the air guide direction of the backlight unit.

The reason why the light source module is disposed in the indirect output structure is that it can reduce the hot spot phenomenon.

Further, a plurality of reinforcing ribs may be disposed on the lower surface of the second reflector.

FIG. 23 is a view showing a reinforcing rib formed on the lower surface of the second reflector. As shown in FIG. 23, a plurality of reinforcing ribs 350 may be disposed on the lower surface of the second reflector.

The reason is that the second reflector has a reflecting surface having a curved surface, so that it can be deformed by external environmental conditions, so that a reinforcing rib 350 can be provided to prevent this.

The reinforcing rib 350 may be disposed not only on the rear surface facing the inclined surface of the second reflector but also on the rear surface facing the side surface of the second reflector.

Further, support pins for supporting the optical member may be formed on the upper surface of the second reflector.

Fig. 24 is a view showing support pins formed on the upper surface of the second reflector. As shown in Fig. 24, support pins 360 supporting the optical member may be formed on the upper surface of the second reflector 300 have.

This is because the optical member is separated from the second reflector 300 and the air guide is formed therebetween, so that the central region of the optical member can be lowered.

Here, it is stable that the area of the lower surface of the support pin 360 contacting the second reflector 300 is larger than the area of the upper surface.

On the other hand, circuit devices for driving the light source module may be disposed below the inclined surface of the second reflector.

Since a predetermined space is formed between the inclined surfaces on the rear surface of the second reflector, if the circuit devices are arranged in the space, the empty space can be efficiently used.

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

As shown in FIG. 25, 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.

26 and 27 are views showing a display device according to an embodiment.

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

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

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

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

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

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

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

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

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

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

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

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

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

Claims (27)

  1. A first reflector;
    A second reflector having an inclined surface at a portion thereof;
    A plurality of light sources disposed between the first and second reflectors; And,
    And a third reflector disposed between the light sources,
    Wherein the third reflector includes first and second reflective members,
    Wherein the first reflecting member is disposed closer to the light source than the second reflecting member, and the reflectance of the first reflecting member is higher than that of the second reflecting member.
  2. The display device according to claim 1, wherein the third reflector is spaced apart from the first reflector by a first distance, and is spaced from the second reflector by a second distance.
  3. 3. The display device of claim 2, wherein the first distance is different from the second distance.
  4. The display device according to claim 1, wherein the third reflector is in contact with the first reflector, and is spaced apart from the second reflector.
  5. The display device according to claim 1, wherein the third reflector is in contact with at least one of the first reflector and the second reflector.
  6. The display device of claim 1, wherein one or more third reflectors are disposed between the adjacent light sources and the light sources.
  7. The display device according to claim 1, wherein one or more light sources are disposed between the adjacent third reflectors.
  8. The lighting apparatus according to claim 1, wherein the third reflector comprises:
    First and second segments disposed on both sides of the light source;
    And a third segment coupled to the first and second segments and disposed between the first reflector and the light source.
  9. The display device according to claim 8, wherein the third segment is in partial contact with the first reflector.
  10. The display device according to claim 1, wherein the third reflector is disposed so as to surround a periphery of the light source.
  11. The display device according to claim 1, wherein the third reflector is superimposed on the first reflector.
  12. The display device according to claim 1, wherein the third reflector is partially overlapped with the first reflector.
  13. The display device according to claim 1, wherein the inclined surface of the second reflector is a surface inclined at an angle with respect to the surface of the first reflector.
  14. The display device according to claim 1, wherein the inclined surface is at least one of a concave surface, a convex surface, and a flat surface.
  15. The display device according to claim 1, wherein the inclined surface of the second reflector overlaps the first reflector.
  16. The display device of claim 1, wherein the second reflector includes at least one inclined surface and at least one flat surface, and the plane of the second reflector is a plane parallel to the first reflector.
  17. The display device according to claim 1, wherein the second reflector includes at least two inclined surfaces having at least one inflection point, and curvatures of the first and second inclined surfaces adjacent to each other around the inflection point are different from each other.
  18. The method according to claim 1,
    Wherein an air guide is formed in a space between the second reflector and the optical member, wherein the air guide is formed in the space between the second reflector and the optical member.
  19. A first reflector;
    A second reflector having an inclined surface at a portion thereof;
    A light source module disposed between the first and second reflectors, the light source module having a plurality of light sources arranged on the substrate; And,
    And a third reflector disposed between the light sources and protruding from the substrate,
    Wherein the third reflector includes first and second reflective members,
    Wherein the first reflecting member is disposed closer to the light source than the second reflecting member, and the reflectance of the first reflecting member is higher than that of the second reflecting member.
  20. delete
  21. The display device according to claim 1, wherein the third reflector includes a groove, and a reflective member is disposed in the groove.
  22. The display device according to claim 21, wherein the reflective member is formed only in a partial area of the third reflector.
  23. The display device according to claim 1, wherein the third reflector includes a regular reflection region and a diffuse reflection region.
  24. 24. The display device according to claim 23, wherein the regular reflection area is disposed closer to the light source than the diffusive reflection area.
  25. The display device according to claim 1, wherein the third reflector includes an opaque region and a transmissive region.
  26. 26. The display device according to claim 25, wherein the opaque region is disposed closer to the light source than the transmissive region.
  27. delete
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KR1020110041495A KR101850429B1 (en) 2011-05-02 2011-05-02 backlight unit and display apparatus using the same
TW100120223A TWI465808B (en) 2010-11-25 2011-06-09 Backlight unit and display apparatus using the same
US13/157,824 US8556442B2 (en) 2010-11-25 2011-06-10 Backlight unit and display apparatus using the same
EP11169545A EP2458430A1 (en) 2010-11-25 2011-06-10 Backlight unit and display apparatus using the same
JP2011130088A JP5936824B2 (en) 2010-11-25 2011-06-10 Backlight unit and display device using the same
CN201110166795.XA CN102478188B (en) 2010-11-25 2011-06-14 The display device of back light unit and use back light unit
US14/043,886 US8985798B2 (en) 2010-11-25 2013-10-02 Backlight unit and display apparatus using the same
US14/043,891 US9140426B2 (en) 2010-11-25 2013-10-02 Backlight unit and display apparatus using the same

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JP2010067600A (en) * 2008-08-11 2010-03-25 Opt Design:Kk Light source device and illuminating device using this light source device
JP2010157445A (en) * 2008-12-27 2010-07-15 Harison Toshiba Lighting Corp Surface light-emitting device of led light source

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