KR101681327B1 - Display apparatus - Google Patents

Abstract

The present invention relates to a display device, comprising: a display module; A front panel disposed at the front of the display module and including a rim bent backward; And a first support member having one side fixed to the display module, and a rim portion of the front panel includes a reflection region having a convex outer surface.

Description

[0001]

The present invention relates to a display device.

(PDP), Electro Luminescent Display (ELD), Vacuum Fluorescent Display (VFD), and the like have been developed in recent years in response to the demand for display devices. Display) have been studied and used.

Among them, a liquid crystal panel of an LCD includes a liquid crystal layer and a TFT substrate and a color filter substrate facing each other with the liquid crystal layer interposed therebetween. Since there is no self-luminous force, the image is displayed using light provided from the backlight unit can do.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure of a display device capable of improving stability and appearance of a display device.

A display device according to an embodiment of the present invention includes a display module; A front panel disposed in front of the display module and including a rim bent rearward; And a first support member having one side fixed to the display module, and a rim portion of the front panel includes a transmissive region having a concave outer surface.

According to the display device according to the embodiment of the present invention, the size of the outer area of the display device, which is visually displayed to the user, can be reduced by forming the transmissive area having the same function as the concave lens at the edge of the front panel.

According to the display device according to another embodiment of the present invention, the backlight unit is brought into close contact with the display panel, thereby simplifying the manufacturing process of the display device and reducing the thickness of the device. In addition, by disposing the plurality of light sources in the backlight unit to emit light in mutually different directions, light of uniform brightness can be provided to the display panel, thereby improving the image quality of the display image.

1 is a perspective view showing a configuration of a display device.
2 is a view showing an embodiment of a front structure of a display device.
3 is a cross-sectional view showing a configuration of a display device according to the first embodiment of the present invention.
4 is a perspective view showing an embodiment of the configuration of the support member.
5 is a cross-sectional view showing a configuration of a display device according to a second embodiment of the present invention.
6 is a cross-sectional view showing the configuration of the display device shown in Fig. 5 in more detail.
7 is a view schematically showing the principle of a convex mirror.
8 is a plan view showing an embodiment of a front surface shape of a display device.
9 is a view showing a state in which the display device is fixed to a wall surface.
10 is a cross-sectional view showing a configuration of a display device according to a third embodiment of the present invention.
11 to 14 are cross-sectional views showing other embodiments of the configuration of a display device according to the present invention.
15 and 16 are perspective views showing still another embodiment of the configuration of a display device according to the present invention.
17 to 35 are views showing embodiments of a configuration of a backlight unit included in a display device.
36 is a cross-sectional view showing an embodiment of a method of connecting a display module and a driving unit.

Hereinafter, the present invention will be described with reference to the accompanying drawings. Hereinafter, the embodiments may be modified into various other forms, and the technical scope of the embodiments is not limited to the embodiments described below. The embodiments are provided so that this disclosure may be more fully understood by those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

1 is an exploded perspective view schematically showing major configurations of a display device.

1, a display device 1 includes a display panel 31 for displaying an image, a backlight unit 32 for providing a light source to the display panel 31, a display panel 31 and a display panel 31 in accordance with an external signal, A front panel 10 and a back cover 40 surrounding the display panel 31 and the backlight unit 32 and a display panel 31 and a backlight unit 32 32 for supporting the front panel 10 with respect to the front panel 10.

For example, the backlight unit 32 may be a cold cathode fluorescent lamp (CCFL) or a cold cathode fluorescent lamp (CCFL). The display panel 31 may be a thin film transistor liquid crystal display (TFT-LCD) ) Or a light emitting diode (LED) as a light source.

The plurality of light sources of the backlight unit 32 according to the present embodiment can be selectively turned on or off according to a video signal, thereby maximizing the lightness ratio of the image of the display panel 31. In addition, as the plurality of light sources are selectively turned on or off, a light guide plate for guiding and diffusing the light of the light source in a predetermined direction may be provided in a separate segment according to the light source.

In the present embodiment, components including the display panel 31 and the backlight unit 32 are referred to as a display module 30. [

Meanwhile, the front panel 31 according to the present embodiment may be formed of a transparent material such as a transparent plastic injection molding material or tempered glass. Examples of the plastic material applicable to the front panel 31 according to the present embodiment include polycarbonate (PC) or polymethyl methacrylate (PPMA).

The front panel 10 is formed in a shape in which the four corners are bent rearward so that a space is formed in which at least a part of the display panel 31 and the backlight unit 32 can be received. A display panel 31 and a backlight unit 32 are fixed to the back surface of the front panel 10 and a support member 20 for supporting the front panel 10 is adhered and fixed.

The support member 20 may include upper and lower support members 21 and 22 and left and right support members 23 and 24. For example, a metal material such as aluminum may be extruded, And may be formed in a plate shape. The support member 20 may be formed in a shape in which a colored material such as black is deposited, that is, a plate having a uniform color.

 The upper and lower support members 21 and 22 are extended in length to correspond to the lengths of the upper and lower edges of the display panel 31 and the backlight unit 32. The left and right support members 23 and 24, The length of the display panel 31 and the backlight unit 32 may correspond to the length of the left and right edges of the display panel 31 and the backlight unit 32, respectively.

The plurality of support members 21, 22, 23 and 24 are formed to have a size corresponding to the rim size of the display panel 31 and are arranged on the rear surface of the front panel 10 And adhered and fixed. That is, in a state where the plurality of support members 21, 22, 23, 24 are fixed to the back surface of the front panel 10, the support members 21, 22, 23, 24 May be formed as a single closed curve.

In this embodiment, the support member 20 is formed of a plurality of bracket structures, but a structure formed of a single bracket structure may also be included in the present embodiment.

A rear cover 40 may be provided behind the display module 30 to form a rear surface of the display device 1. The back cover 40 is fixed to the display module 30 and surrounds the rear of the display module 30 to protect the display module 30. [ The rear cover 40 may further include a shield member for shielding electromagnetic waves emitted from the display module 30 or the rear cover 40 itself may be formed of a metal material for shielding the electromagnetic wave.

Hereinafter, the configuration of fixing the front panel 10 to the support member 20 will be described in detail.

FIG. 2 is a cross-sectional view of a display device according to a first embodiment of the present invention. FIG. 2 shows a state in which a support member is fixed to the rear surface of the front panel of FIG. 3 is a cross-sectional view taken along the line A-A in Fig. 2, and Fig. 4 is a perspective view showing an embodiment of a specific configuration of the support member.

2 to 4, the support member 20 is fixed to the back surface of the front panel 10 made of a transparent material so that at least a part of the support member 20 can be exposed toward the outside of the front of the display device 1.

The support member 20 is fixed to the back surface of the front panel 10 with the end portions of the plurality of support members 21, 22, 23 and 24 engaged with each other, Can be formed.

According to an embodiment of the present invention, only a part of the plurality of support members 21, 22, 23 and 24, for example, the upper and lower support members 21 and 22, And the remaining, e.g., left and right support members 23, 24 may not be secured to the front panel 10.

The display panel 31 and the backlight unit 32 are positioned on the closed curve loop1 and the backlight unit 32 is fixed to the support member 20 and can be supported with respect to the front panel 10. [

The upper support member 21 is fixed to the rear surface of the front panel 10 and includes a first seating portion 211 to which at least a part of the display panel 31 is supported and a second seating portion 211 to bend backward from the first seating portion 211. [ And a first bending part 212 for fixing the display module 30.

Outside the first seating portion 211, both end portions may be inclined at an angle so as to be engaged with the ends of the left and right support members 23 and 24. A cushion member 213 for stably mounting the edge of the display panel 31 is provided on one surface of the first seating portion 211, that is, on the side where the first bent portion 212 is bent And the back surface of the first seating part 211 may be adhered and fixed to the back surface of the front panel 10.

For example, the first bent part 212 may be bent in a direction orthogonal to the first seating part 211 so as to cover the side edge of the display module 30. [ The length in which the first bent portion 212 is extended may be longer than the length of the edge portion 12 of the front panel 10 that is bent from the front panel body 11. [

The first bent portion 212 is formed with a coupling hole 214 through which a coupling member for fixing the display module 30 and more specifically the backlight unit 32 is inserted, May be formed at a position spaced more than the end height of the portion (12).

Similarly to the upper support member 22, the second support portion 221 and the second bent portion 222 may be formed on the lower support member 22 as well. Also, each of the left and right support members 23 and 24 may include the seating portion and the bending portion as described above.

 The upper support member 21 and the lower support member 22 are symmetrically arranged such that the first bent portion 212 and the second bent portion 222 face each other. That is, the first bent portion 212 forms an upper edge of the closed loop loop1 and the second bent portion 222 forms a lower edge of the closed curve loop1. The upper and lower support members 21 , 22 are provided. At this time, the first seating portion 211 and the second seating portion 221 are located in the inner space of the closed curve loop1.

The width d1 of the first seating part 211 and the width d2 of the second seating part 221 may be equal to each other so that a bezel area having the same width can be realized . The width d2 of the second seating portion 221 may be larger than the width d1 of the first seating portion 211. [

That is, the second bent portion 222 bent from the second seating portion 221 is a portion where the lower edge of the backlight unit 32 is fixed and supported in a state where the display device 1 is installed, 32 and the fastening force with the backlight unit 32 are applied. The second seat portion 221 must support the self weight and the engagement force simultaneously.

Therefore, the second seating portion 221 needs to have a larger supporting force than the first seating portion 211 in which the weight of the backlight unit 32 is not directly applied. Therefore, the width of the second seating portion 221 (d2). That is, the adhesive fixed area to the front panel 10 may be larger than the width d1 of the first seating part 211. [

An adhesive member 218 is provided on the back surfaces of the first and second seating portions 221 and 222 so that the first seating portion 221 and the second seating portion 222 are disposed on the front panel 10, As shown in FIG.

The adhesive member 218 may be provided, for example, with a UV-curable resin such as an epoxy resin. When the adhesive member 218 is provided with a UV curable resin, the upper support member 21 is attached to the back surface of the front panel 10 in a state where the adhesive member 218 is provided on the back surface of the first seat portion 221 And then the ultraviolet rays are transmitted through the front panel 10 formed of a transparent material, so that the adhesive member 218 can be simply cured.

In order to prevent the adhesive member 218 from being exposed on the front surface of the display device 1, a light shielding pattern, for example, a black print layer is formed between the back surface of the front panel 10 and the adhesive member 218 .

The front panel 10 may include a front panel body 11 formed in a planar shape and a rim 12 formed by bending toward the rear of the front panel 10 to form the rim of the front panel 10.

An image display area is formed on the front panel body 11, and an image displayed on the display panel 31 can be seen through the image display area.

The film layer 18 may be provided at a portion of the body 11 of the front panel 10 corresponding to the image display region so that scratches and diffused reflection of the front panel 10 can be prevented have.

5 is a cross-sectional view illustrating a configuration of a display device according to a second embodiment of the present invention. The description of the configuration of the display device shown in FIG. 5, which is the same as that described with reference to FIGS. 1 to 4, . Fig. 6 is an enlarged view of a part of the configuration of the display device shown in Fig.

5 and 6, the rim portion 12 of the front panel 10 may include a transmissive region 13 having a concave outer surface, and the transmissive region 13 may include a front panel 10, respectively.

The transmissive area 13 formed in the rim portion 12 of the front panel 10 has a function similar to that of the concave lens so that the outer area of the display device 1, Can be seen.

That is, at least a part of the transmission area 13 of the front panel 10 is formed at a position overlapping with the supporting member 23, and a part of the supporting member 23, for example, So that the display unit 1 can be exposed.

In this case, the width of the support member 23 shown by the user on the front surface of the display device 1 can be seen to be smaller than the actual width d3 by the transmission area 13 of the front panel 10. [

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The outer surface of the transmissive area 13 may have a concave shape in the outward direction and the inner surface may have a flat shape so that the transmissive area 13 of the front panel 10 performs a function similar to that of the concave lens as described above .

In order to allow the transmissive area 13 to function as a concave lens without increasing the size of the outer area of the display device 1 as well as the transmissive area 13 of the front panel 10, May have a curvature of from 10 to 20.

According to one embodiment of the present invention, by reducing the width d3 of the support member 23, and more specifically, the width d3 of the seating portion 231, the outer region shown to the user, Can be further reduced.

In this case, the support member 23 may not be fixed to the front panel 10, and the support member 23 may be fixed to the seat 231 of the support member 23 and the front panel 10 The bending portion 232 can be fixed to the display module 30, more specifically, the bottom cover 321 via the fixing member 51. In this case,

The fixing member 51 may be a screw that is fixed to the bottom cover 321 through the supporting member 23 to fix the display module 10 to the supporting member 23. [

A surface of the seating portion 231 of the support member 23 adjacent to the transmissive region 13 of the front panel 10 may be formed to be parallel to the flat inner surface of the transmissive region 13.

According to an embodiment of the present invention, only a part of the plurality of support members 21, 22, 23, 24 included in the display device 1 may have a structure as described with reference to Figs. 5 and 6 .

For example, the right and left support members 23 and 24 among the plurality of support members 21, 22, 23, and 24 have a structure as described with reference to FIGS. 5 and 6, The support members 21 and 22 may have a structure as described with reference to FIG. In this case, Figs. 5 and 6 may be sectional views taken along the line A-A of Fig.

That is, the upper and lower support members 21 and 22 are adhered and fixed to the rear surface of the front panel 10 using the adhesive members 218, 222 can be fixed to the bottom cover 321 to support and fix the display module 30.

On the other hand, the left and right side support members 21 and 22 are not fixed to the contact surface panel 10 and only the respective bent portions 212 and 222 are fixed to the bottom cover 321 .

The widths d1 and d2 of the seating portions 211 and 221 of the upper and lower support members 21 and 22 respectively correspond to the seating portions 231 and 241 of the right and left support members 23 and 24, May be formed larger than the widths (d3, d4).

The widths d3 and d4 of the seating portions 231 and 241 of the right and left support members 23 and 24 are made small and the widths d3 and d4 of the front panel 10 By providing the transmission areas 13 as described above in each of the right and left frame parts 12, the widths of the left and right outer areas of the display device 1, i.e., the bezel areas, as seen by the user at the front face, .

8, there may be a bezel area B formed to correspond to each of the support members 21, 22, 23, and 24 in the outer area of the display device 1, for example, the non-display area .

The bezel region B may be formed by exposing the support members 21, 22, 23 and 24 to the front side through the front panel 10 or may correspond to the positions of the support members 21, 22, 23 and 24 A black printed layer formed on the back surface of the front panel 10, and the like.

As described above, the widths d1 and d2 of the seating portions 211 and 221 of the upper and lower support members 21 and 22 are set to the seating portions 231 and 232 of the right and left support members 23 and 24, The widths d3 and d4 of the front panel 10 are set to be larger than the widths d3 and d4 of the front panel 10 and the transmissive areas 13 are provided in the right and left frame parts 12 of the front panel 10, The width w2 of the left and right bezel areas of the display device 1 shown by the user can be seen to be smaller than the width w1 of the upper and lower bezel areas.

This is because the width w2 of the left and right bezel areas is smaller than the width w1 of the upper and lower bezel areas of the display device 1 because the image display area of the display device 1 is larger It can be effective.

FIG. 9 shows a state in which the display device is fixed to a wall surface. Description about the same components as those described with reference to FIGS. 1 to 8 in the configuration of the display device shown in FIG. 9 will be omitted below.

Referring to Fig. 9, the display device 1 may be fixed to a wall surface W or the like by a wall mount.

In this case, according to an embodiment of the present invention, the rim of the front panel 10 bent backward as described above is formed so as to be in close contact with the wall surface W, more preferably close to the wall surface W . Thereby, the front surface of the display device 1 can have a smoother appearance.

In the above description, the edge portion 12 of the front panel 10 includes the transmissive region 13 serving as a concave lens. For example, the structure of the display device according to the embodiment of the present invention has been described. However, But not limited to this.

In other words, the rim portion 12 of the front panel 10 may include an area that serves to make the object smaller than the concave lens. For example, the rim portion 12 may include a portion of the display device 1 And a region functioning as a Fresnel lens or the like may be provided at the corner portion.

The Fresnel lens originates from a lens whose thickness is reduced while having the same function as a convex lens or a concave lens. Specifically, the convex Fresnel lens is made by cutting a convex lens in an upright state into a plurality of segments in the lateral direction (direction parallel to the light passing direction) and horizontally moving these pieces in one plane. Then, the rounded refracting surface of the convex lens formed on each piece is flattened and deformed into a prism shape. When the rounded refracting surface of the convex lens is flattened, the chromatic aberration is reduced and the thickness of the lens itself is reduced.

FIG. 10 is a cross-sectional view illustrating the configuration of a display device according to a third embodiment of the present invention. The description of the same components as those described with reference to FIGS. 1 to 9 of the display device will be omitted hereunder .

10, the backlight unit 32 of the display module 30 according to the present embodiment is accommodated in the bottom cover 321 and the bottom cover 321 forming the body of the backlight unit 32, A plurality of optical sheets 323 for allowing light emitted from the optical assembly 322 to be diffused at a uniform illuminance and a panel guide 324 for supporting the display panel 31 from the rear side .

The bottom cover 321 is formed in a box shape having one side opened, and the optical assembly 322 is accommodated therein, and the optical sheet can be fixed to the opened side.

A driving unit 33 for driving the display module 30 may be fixed to a rear surface of the bottom cover 321. A rear cover (not shown) may be disposed on the rear surface of the bottom cover have.

The optical assembly 322 may be provided with a plurality of light sources such as LEDs and a plurality of light guide plates for diffusing the light emitted from the respective light sources forward.

The display panel 31 may include a first substrate 311 and a second substrate 312 to which a liquid crystal is injected between the first and second substrates 311 and 312, The respective edge sides can be fixed to each other by an adhesive member such as a UV curable resin.

In this case, the front edge of the first substrate 311 is seated on the cushion member 213 of the supporting member 21 and is supported rearward, and the rear edge of the second substrate 312 is forwardly guided by the panel guide 324 The display panel 31 can be firmly held in its position.

Hereinafter, the assembling process of the display device 1 according to the present embodiment will be described in detail.

First, the support member 20 is fixed to the rear edge of the front panel 10. At this time, the support members 21, 22, 23, and 24 are disposed so that the respective ends formed to be inclined can be engaged with each other, and the back surface of the front panel 10 As shown in Fig.

Then, the display panel 31 and the backlight unit 32 are placed inside the closed curve loop1 formed by the support member 20. Then,

A fixing member 51 such as a screw is passed through the bent portion 212 of the support member 20 and fixed to the side edge portion of the backlight unit 32. [ The front edge side of the display panel 31 is supported by the support member 20 while the back edge side is supported by the panel guide 324, A solid support for the display panel 31 can be performed.

At this time, the front surface of the display panel 31 is disposed at a distance from the back surface of the front panel body 11, and the spacing distance may be determined by the cross-sectional thickness of the support member 20.

The bending portion 212 is disposed in a direction perpendicular to the plane in which the body 11 of the front panel 10 is formed and the fixing member 51 is pierced in a direction perpendicular to the bending portion 212 . Therefore, the fixing member 51 can provide a fastening force in a direction perpendicular to the bent portion 212, that is, in a direction parallel to the plane in which the front panel body 11 is formed.

The fastening force by the fixing member 51 can be provided with the tension P1 formed in the outward direction from the center of the plane of the front panel body 11. [ Accordingly, the front panel body 11 is pulled in the direction of the outer edge of the front panel body 11, and the plane center side of the front panel body 11 can be prevented from being bent forward or backward.

Thereafter, the rear cover (not shown) is aligned behind the backlight unit 32, and then fixed to the backlight unit 32, so that the back of the backlight unit 32 can be shielded by dLT

The display panel 31 and the backlight unit 32 are fixed and supported directly on the support member 20 disposed on the back surface of the front panel 10, The bezel width, the front and rear width, and the overall weight of the display device 1 can be advantageously reduced.

11 to 14 are sectional views of other embodiments of the display device according to the present invention. The description of the same structure as that described with reference to Figs. 1 to 10 of the display device shown in Fig. .

11, when the heat is transmitted to the front panel body 11 through the display panel 31, the front side of the front panel body 11, in which the support member 20 is provided, The front-rear displacement of the central portion of the front panel body 11 becomes larger.

Accordingly, the front panel body 11 of the display device 1 according to the present embodiment may be formed such that the center portion thereof is spaced further forward than the edge portion.

The center of the front panel body 11 is spaced forward from the edge of the front panel body 11, and the spacing distance is set such that the edge of the front panel body 11 is spaced apart from the display panel 11 As shown in FIG.

The distance between the central portion of the front panel body 11 and the display panel 11 is twice as large as the distance between the edge of the front panel body 11 and the display panel 11 in the initial state As shown in FIG.

Also, in order to minimize screen distortion due to different separation distances, the front panel body 11 may be formed in a shape that is gradually inclined from the center portion to the edge side, that is, a shape that is finely curved at a certain curvature.

Referring to FIG. 12, the front panel 10 of the display device according to the present embodiment may further include a curved rim portion 18. More specifically, the curved rim portion 18 is provided on the upper edge portion of the front panel 10 and may be formed into a gradually curved shape.

The curved frame portion 18 is provided on the upper edge of the front panel 10 and the curved frame portion 18 is formed on the lower edge and / It is also possible.

Referring to FIG. 13, the rim of the front panel 10 of the display device according to the present embodiment may form the same plane as the front panel body 11. That is, unlike the other embodiments, the rim of the front panel 10 according to the present embodiment is not formed in a bent shape, but is located on a plane continuous with the front panel body 11. [

Referring to FIG. 14, the support member according to the present embodiment may be formed in a plate shape perpendicular to the back surface of the front panel body 11. More specifically, the support member may include an upper support member 26 and a lower support member 27, and a side support member not shown in the figure.

The support member may be formed in a plate shape that encloses the edges of the liquid crystal panel and the backlight unit and may be disposed in a direction perpendicular to the back surface of the front panel body 11. [

Adhesive members (268, 278) are provided on one side of the support member to adhere and fix the support member to the back surface of the front panel body (11).

15 and 16 are views showing a display device according to another embodiment of the present invention.

15, the display device includes a display module 10, a front cover 45 and a back cover 40 surrounding the display module 10, a driving unit 55 provided in the back cover 40, And a driving unit cover 50 surrounding the driving unit cover 55.

The front cover 45 may include a transparent front panel that transmits light. The front panel protects the display module 10 at regular intervals, transmits light emitted from the display module 10, So that the image displayed on the module 10 is displayed from the outside.

Further, the front cover 45 can be made of a flat plate without a window. In this case, the front cover 45 is made of a transparent material that transmits light, for example, an injection-molded plastic. Thus, if the front cover 45 is formed as a flat plate, the frame can be removed from the front cover 45. The back cover 40 can be coupled with the front cover 45 to protect the display module 10.

A driving unit 55 may be disposed on one side of the back cover 40. The driving unit 55 may include a driving control unit 55a, a main board 55b, a power supply unit 55c, and the like. For example, the drive 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, and the main board 55b may include a V-sync, H- R, G and B resolution signals, and the power supply unit 55c is a driving unit for applying power to the display module 10. [

The driving unit 55 may be provided on the back cover 40 and may be enclosed by the driving unit cover 50. The back cover 40 is provided with a plurality of holes so that the display module 10 and the driving unit 55 can be connected. Further, a stand 60 supporting the display device may be provided.

16, the driving control unit 55a of the driving unit 55 is provided in the back cover 40, and the main board 55b and the power board 55c may be provided in the stand 60 have. The driving unit cover 50 may cover only the driving unit 55 provided in the back cover 40.

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.

17 to 35 show embodiments of a backlight unit included in a display device according to an embodiment of the present invention.

The display module 10 may include a display panel 100 and a backlight unit 200. More specifically, the display module 100 may include a backlight unit 200 extending along the display panel 100, and the backlight unit 200 may correspond to a display region of the display panel 100 And can be positioned on the lower side. For example, the size of the backlight unit 200 may be the same as or similar to the size of the display panel 100.

According to the embodiment of the present invention, the display device can be configured by placing the backlight unit 200 in close contact with the rear surface of the display panel 100.

For example, the backlight unit 200 may be fixed to the lower surface of the display panel 100, more specifically, to the lower polarizer plate, and an adhesive layer (not shown) may be interposed between the lower polarizer plate and the backlight unit 200, Can be formed.

By forming the backlight unit 200 in close contact with the rear surface of the display panel 100 as described above, the overall thickness of the display device can be reduced to improve the appearance, and the structure for fixing the backlight unit 200 can be removed The structure and manufacturing process of the display device can be simplified.

In addition, by removing the space between the backlight unit 200 and the display panel 100, it is possible to prevent a malfunction of the display device or deterioration of the display quality of the display image due to the insertion of foreign substances into the space.

According to an exemplary embodiment of the present invention, the backlight unit 200 may include a plurality of functional layers stacked, and at least one of the plurality of functional layers may include a plurality of light sources (not shown) .

The backlight unit 200 and more specifically the plurality of layers constituting the backlight unit 200 may be disposed on the lower surface of the display panel 100 so that the backlight unit 200 is in contact with the lower surface of the display panel 100. [ It is preferable that they are each made of a flexible material.

According to an embodiment of the present invention, the display panel 100 may be divided into a plurality of regions, and may be divided into a plurality of regions corresponding to a gray peak value or a color coordinate signal of each of the divided regions from a corresponding region of the backlight unit 200 The brightness of the emitted light, that is, the brightness of the light source is adjusted, so that the brightness of the display panel 100 can be adjusted.

For this purpose, the backlight unit 200 may be divided into a plurality of divided driving regions corresponding to the respective divided regions of the display panel 100 and operated.

Referring to FIG. 17, the backlight unit 200 may include a first layer 210, a light source 220, a second layer 230, and a reflective layer 240.

17, a plurality of light sources 220 are formed on a first layer 210 and a second layer 230 is disposed on an upper side of the first layer 210 to form a plurality of light sources 220, As shown in FIG. The second layer 230 may completely cover the plurality of light sources 220 formed on the first layer 210 and the second layer 230 may cover the plurality of light sources 220 formed on the first layer 210 Only certain portions or specific surfaces of the formed plurality of light sources 220 may be covered.

The first layer 210 may be a substrate on which a plurality of light sources 220 are mounted and may include an electrode pattern (not shown) for connecting an adapter (not shown) . For example, a carbon nanotube electrode pattern (not shown) for connecting the light source 220 and the adapter (not shown) may be formed on the upper surface of the substrate.

The first layer 210 may be a PCB (Printed Circuit Board) substrate formed by using polyethylene terephthalate, glass, polycarbonate, or silicon, and mounting a plurality of light sources 220, .

The light source 220 may be one of a light emitting diode (LED) chip or a light emitting diode package having at least one light emitting diode chip. In the present embodiment, a light emitting diode package is provided as the light source 220. FIG.

Meanwhile, the LED package constituting the light source 220 may be divided into a top view mode and a side view mode depending on a direction in which the light emitting surface is directed, and the light source 220 according to the embodiment of the present invention may be divided into a top view mode and a side view mode. A top view type LED package in which a light emitting surface is an upper side of the LED package (e.g., light is emitted in an upward direction or a vertical direction), and an LED package in which a light emitting surface is an upper side Or a side view type LED package in which light is emitted in a direction or a horizontal direction).

In addition, the light source 220 may be a colored LED or a white LED that emits at least one color among colors such as red, blue, green, and the like. Also, the colored LED may include at least one of a red LED, a blue LED, and a green LED, and the arrangement and emission light of such a light emitting diode may be changed within the technical scope of the embodiment.

The second layer 230 disposed on the first layer 210 and surrounding the plurality of light sources 220 transmits and diffuses the light emitted from the light source 220, So that the light emitted from the display panel 220 can be uniformly provided to the display panel 100.

A reflective layer 240 may be formed on the upper surface of the first layer 210, for example, between the first layer 210 and the second layer 230 to reflect light emitted from the light source 220. The upper reflective layer 240 of the first layer 21 may reflect the light totally reflected from the boundary of the second layer 230 and diffuse the light emitted from the light source 220 more widely.

The reflective layer 240 may be formed by dispersing a white pigment such as titanium oxide in a synthetic resin sheet, a metal vapor-deposited film on a surface thereof, or a sheet made of synthetic resin in which air bubbles are dispersed in order to scatter light And silver (Ag) may be coated on the surface to increase the reflectance. Meanwhile, the reflective layer 240 may be formed on the upper surface of the first layer 210 as a substrate.

The second layer 230 may be composed of a light-transmitting material, for example, silicon or acrylic resin. However, the second layer 230 is not limited to the above-described materials, and may be composed of various resins.

The second layer 230 may be formed of a resin having a refractive index of about 1.4 to 1.6 so that light emitted from the light source 220 is diffused and the backlight unit 200 has a uniform brightness.

For example, the second layer 230 may be formed of any one material selected from the group consisting of polyethylene terephthalate, polycarbonate, polypropylene, polyethylene, polystyrene, and polyepoxy, silicone, acrylic, and the like.

The second layer 230 may include a polymer resin having a predetermined adhesive property so as to firmly adhere to the light source 220 and the reflective layer 240. For example, the second layer 230 may comprise at least one of an unsaturated polyester, methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, n-butyl methacrylate, n-butyl methyl methacrylate, Hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, acrylamide, methylol acrylamide, glycidyl methacrylate, ethyl acrylate, isobutyl acrylate, n-butyl acrylate, 2 -Ethylhexyl acrylate polymer, a copolymer or a terpolymer, and the like, acrylic, urethane, epoxy, melamine and the like.

The second layer 230 may be formed by applying a liquid or gel resin to the upper surface of the first layer 210 on which the plurality of light sources 220 and the reflective layer 240 are formed and then curing the resin, Or may be separately formed and adhered to the upper surface of the first layer 210.

As the thickness a of the second layer 230 increases, light emitted from the light source 200 spreads more widely, and light of a uniform luminance from the backlight unit 200 is supplied to the display panel 100 . On the other hand, as the thickness a of the second layer 230 increases, the amount of light absorbed into the second layer 230 may increase, and thus the amount of light supplied from the backlight unit 200 to the display panel 100 The luminance can be reduced as a whole.

The thickness a of the second layer 230 may be in the range of 0.1 to 4.5 mm in order to provide light of uniform brightness without significantly reducing the brightness of the light provided from the backlight unit 200 to the display panel 100 .

The first layer 210 of the backlight unit 100 is a substrate on which a plurality of light sources 220 are formed and the second layer 230 is a resin layer of a specific resin. The configuration of the backlight unit 200 according to the embodiment of the present invention will be described in detail.

18, a plurality of light sources 220 are mounted on a substrate 210, and a resin layer 230 covering all or a part of the light sources 220 is disposed on a substrate 210 have. Meanwhile, a reflective layer 240 may be formed between the substrate 210 and the resin layer 230, for example, on the upper surface of the substrate 210.

18, the resin layer 230 may include a plurality of scattering particles 231, and the scattering particles 231 scatter or refract incident light to form a plurality of scattering particles 231 from the light source 220 So that the emitted light can be diffused more widely.

The scattering particles 231 are formed of a material having a refractive index different from that of the material constituting the resin layer 230 in order to scatter or refract light emitted from the light source 220, Or a material having a refractive index higher than that of the acrylic resin.

For example, the scattering particles 231 may be selected from the group consisting of polymethylmethacrylate / styrene copolymer (MS), polymethylmethacrylate (PMMA), polystyrene (PS), silicon, titanium dioxide (TiO2) ), And the like, and may be formed by combining the above materials.

The scattering particles 231 may be formed of a material having a refractive index lower than that of the material of the resin layer 230. For example, the scattering particles 231 may be formed by forming a bubble in the resin layer 230 .

In addition, the material constituting the scattering particles 231 is not limited to the above-described materials, and may be formed using various polymer materials or inorganic particles.

According to an embodiment of the present invention, the resin layer 230 may be formed by mixing scattering particles 231 in a liquid or gel-like resin, and then forming a plurality of light sources 220 and a reflective layer 240, To the upper surface of the substrate 210 and then curing it.

18, an optical sheet 250 may be disposed on the upper side of the resin layer 230. For example, the optical sheet 250 may include one or more prism sheets 251 and / or one or more diffusion sheets 252 ).

In this case, the plurality of sheets included in the optical sheet 250 may be provided in an adhered or closely adhered state without being separated from each other, so that the thickness of the optical sheet 250 or the backlight unit 200 may be reduced.

The lower surface of the optical sheet 250 is in close contact with the resin layer 230 and the upper surface of the optical sheet 250 is in close contact with the lower surface of the display panel 100, have.

The diffusion sheet 252 diffuses the incident light to prevent the light from the resin layer 230 from being partially concentrated, thereby making the brightness of the light more uniform. The prism sheet 251 condenses the light emitted from the diffusion sheet 252 and allows light to be vertically incident on the display panel 100.

According to another embodiment of the present invention, at least one of the optical sheet 250 as described above, e.g., the prism sheet 251 and the diffusion sheet 252, may be removed, or the prism sheet 251 and / And may further include various functional layers other than the diffusion sheet 252. [

A plurality of holes (not shown) may be formed in the reflective layer 240 at positions corresponding to the plurality of light sources 220. A plurality of light sources (not shown) mounted on the lower substrate 210 220 may be inserted.

In this case, the light sources 220 may be inserted from below through the holes formed in the reflection layer 240, and at least a part of the light sources 220 may protrude upward from the reflection layer 240.

The backlight unit 200 may be formed by using the structure in which the light sources 220 are inserted into the holes of the reflection layer 240 so that the distance between the substrate 210 on which the light sources 220 are mounted and the reflection layer 240 It is possible to further improve the fixability.

The plurality of light sources 220 provided in the backlight unit 200 are arranged such that the light emitting surfaces are respectively disposed on the lateral sides to emit light in the lateral direction, for example, the direction in which the substrate 210 or the reflective layer 240 extends can do.

For example, the plurality of light sources 220 may be configured using a side view LED package, thereby reducing the possibility that the light source 220 is viewed as a hot spot on the screen, The thickness a of the resin layer 230 can be reduced to realize the slimness of the backlight unit 200 and further the display device.

19, a pattern layer including a plurality of patterns 232 may be formed on the resin layer 230 of the backlight unit 200 including the light sources 220. More specifically, The plurality of patterns 232 included in the pattern layer may be formed on the resin layer 230 so as to correspond to the positions where the light sources 220 are disposed.

For example, the pattern 232 formed on the upper side of the resin layer 230 may be a reflection pattern that reflects at least a part of the light emitted from the light source 220.

The reflection pattern 232 may be formed on the resin layer 230 to reduce the brightness of light emitted from the region adjacent to the light source 220 as shown in FIG. So that light of a luminance can be emitted.

That is, the reflection pattern 232 is formed on the resin layer 230 so as to correspond to the positions where the plurality of light sources 220 are disposed, selectively reflects light emitted upward from the light source 220, ), And the reflected light can be diffused in the lateral direction.

More specifically, light emitted upward from the light source 220 is diffused in the lateral direction by the reflection pattern 232 and is reflected downward. Light reflected by the reflection pattern 232 is reflected by the reflection layer 240 The light can be diffused again in the lateral direction and reflected in the upward direction. That is, the reflection pattern 232 may reflect 100% of the incident light, reflect a part of the incident light, and pass a part thereof. As such, the characteristics of the reflective pattern 232 can be adjusted by controlling the transmission of light through the resin layer 230 and the reflective pattern 232.

Accordingly, the light emitted from the light source 220 can be widely diffused in the lateral direction and the other directions without concentrating on the upper side, whereby light of a more uniform luminance can be emitted from the backlight unit 200.

The reflection pattern 232 may include a reflective material such as a metal or the like and may include a metal having a reflectance of 90% or more such as aluminum, gold or gold. For example, the reflective pattern 232 may be of a material or shape that allows less than about 10% of the incident light to pass through and the remainder to be reflected.

In this case, the reflection pattern 232 may be formed by vapor-depositing or coating the metal as described above. Alternatively, a reflective ink such as a silver ink containing a metal may be formed according to a predetermined pattern. The reflection pattern 232 may be formed by printing.

In order to improve the reflection effect of the reflection pattern 232, the color of the reflection pattern 232 may have a high-brightness color, for example, a color close to white. More specifically, It can have a high-brightness color.

Meanwhile, the reflection pattern 232 may include a metal oxide, for example, titanium dioxide (TiO ₂ ). More specifically, reflective ink containing titanium dioxide (TiO ₂ ) may be printed according to a predetermined pattern to form a reflective pattern 232.

The plurality of reflection patterns 232 are formed to correspond to the positions of the light sources 220. The center of the reflection pattern 232 corresponds to the positions of the light sources 220 corresponding to the positions of the light sources 220, The center of the reflection pattern 232 may be spaced apart from the center of the corresponding light source 220 by a predetermined distance.

20, the plurality of light sources 220 and 221 included in the backlight unit 200 are divided into a plurality of arrays, for example, a first light source array A1 and a second light source array A2 .

The first light source array A1 and the second light source array A2 may include a plurality of light source lines formed by the light sources, respectively. For example, the first light source array A1 is composed of a plurality of lines L1 each including two or more light sources, and the second light source array A2 is composed of a plurality of lines L2).

The light source lines included in the first light source array A1 and the light source lines included in the second light source array A2 may be alternately arranged so as to correspond to the display region of the display panel 100. [

In another embodiment of the present invention, the first light source array A1 includes odd-numbered light source lines from the upper side among a plurality of light source lines formed by the plurality of light sources, and the second light source array A2 is composed of upper And even-numbered light source lines from the even-numbered light source lines.

The first light source line L1 included in the first light source array A1 and the second light source line L2 included in the second light source array A2 are disposed vertically adjacent to each other and the first light source line L1 ) And the second light source line (L2) are alternately arranged to constitute the backlight unit (200).

The light source 220 included in the first light source array A1 and the light source 222 included in the second light source array A2 may emit light in the same direction or emit light in different directions .

Referring to FIG. 20, the backlight unit 200 may include two or more light sources that emit light in different directions.

That is, the light sources 220 included in the first light source array A1 and the light sources 222 included in the second light source array A2 may emit light in different directions. For this purpose, The direction in which the light emitting surfaces of the light sources 220 included in the first light source array A2 are directed may be different from the direction in which the light emitting surfaces of the light sources 222 included in the second light source array A2 are directed.

More specifically, the light emitting surfaces of the first light source 220 and the second light source 221 included in the first light source array A1 and the light emitting surface of the third light source 222 included in the second light source array A2 The first light source 220 and the second light source 221 included in the first light source array A1 and the second light source 221 included in the second light source array A2 can be formed so as to face each other, And the third light source 222 can emit light in mutually opposite directions.

In this case, the light sources provided in the backlight unit 200 may emit light in the lateral direction, respectively, and may be configured using a side view type LED package.

On the other hand, the plurality of light sources provided in the backlight unit 200 may be arranged to form two or more rows, and two or more light sources arranged in the same row may emit light in the same direction.

For example, the second light source 221 adjacent to the first light source 220 also emits light in the same direction as the first light source 220, that is, the x-axis direction, and the light sources adjacent to the third light source 222 It is possible to emit light in the same direction as the third light source 222, that is, in the direction opposite to the x-axis direction.

As described above, by forming the light emitting directions of the light sources arranged in the y-axis direction, for example, the second light source 221 and the third light source 222 in opposite directions to each other, It is possible to reduce the phenomenon that the brightness of light is concentrated or weakened.

In other words, the light emitted from the second light source 221 can be weakened as it proceeds to the adjacent light source, and accordingly, as the distance from the second light source 221 increases, the luminance of light emitted toward the display panel 100 Can be weakened.

Therefore, by reversing the direction in which the light is emitted from each of the second light source 221 and the third light source 222, it is possible to compensate for the fact that the brightness of light in the region adjacent to the light source is concentrated and the light in the region far from the light source is weakened So that the luminance of the light emitted from the backlight unit 200 can be made uniform.

The first light source line L1 included in the first light source array A1 and the second light source line L2 included in the second light source array A2 are arranged such that the right and left positions of the light sources do not coincide with each other, So that uniformity of light emitted from the backlight unit 200 can be improved.

That is, the third light source 222 included in the second light source array A2 is arranged to be adjacent to the first light source 220 or the second light source 221 included in the first light source array A1 in the diagonal direction .

Figs. 21 to 28 are enlarged views of the P region in Fig.

21 and 22, two light source lines, for example, the first light source line L1 and the second light source line L2, which are included in the first light source array A1 and the second light source array A2, The two light source lines L2 may be spaced apart by a predetermined distance.

The first light source array (A1) may include a first light source (220) emitting light in one direction. The second light source 221 disposed adjacent to the first light source 220 and disposed on the same horizontal line l1 as the first light source 220 and emitting light in the same direction as the first light source 220 . Here, the horizontal line l1 may be a line extending in the x-axis direction.

The second light source array A2 may be provided with a third light source 222 through which light is emitted in a direction opposite to the first light source 220. [ The third light source 222 is disposed between the first light source 220 and the second light source 221 and may be disposed diagonally with the first light source 220 or the second light source 221.

The third light source line L3 formed in the first light source array A1 may be spaced apart from the second light source line L2 by a predetermined distance. The third light source line L3 emits light in the same direction as the second light source 221 and is perpendicular to the direction in which the light of the second light source 221 is emitted and is perpendicular to the second light source 221 the second light source 223 may be disposed on the second light source 223.

The third light source 222 may be disposed between the second light source 221 and the fourth light source 223 and the distance d1 between the second light source 221 and the fourth light source 223 may be bisected And may be disposed on the horizontal line l3.

The third light source 222 may be disposed adjacent to a line 2 perpendicular to the second light source 221 and may be disposed in a direction opposite to a direction in which the light of the second light source 221 is emitted .

Here, the light directing angle [theta] from the light source and the light directing angle [theta] 'in the second layer 230 can have the relationship expressed by the following equation (1) according to Snell's law.

On the other hand, considering that the portion where light is emitted from the light source is an air layer (the refractive index n1 is 1) and the directivity angle of the light emitted from the light source is 60 degrees, The light directing angle? 'In the layer 230 may have a value as shown in the following equation (2).

When the second layer 230 is made of acrylic resin such as polymethyl methacrylate (PMMA), the refractive index of the second layer 230 is about 1.5. Therefore, the light-directing angle in the second layer 230 can be about 35.5 degrees.

As described above with reference to Equations 1 and 2, the directing angle? 'At which light is emitted from the light source in the second layer 230 may be less than 45 degrees, and the range in the y-axis direction may be smaller than that in the x-axis direction.

Accordingly, the third light source 222 may be disposed on the horizontal line? 3 bisecting the distance d1 between the second light source 221 and the fourth light source 223, thereby emitting light from the backlight unit 200 The brightness of the emitted light can be uniform.

22, the first light source 220, the second light source 221, and the third light source 222 may be spaced apart from each other by a predetermined distance.

More specifically, the first light source 220 and the second light source 221 have a first distance d2 that is a distance between the light emitting surface of the first light source 220 and the light emitting surface of the second light source 221 Lt; / RTI > The first light source 220 and the third light source 222 have a second distance d3 that is a distance between the center of the light emitting surface of the first light source 220 and the center of the light emitting surface of the third light source 222 . The third distance d4 may be a horizontal distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222.

The first distance d2 is a distance between the center of the light emitting surface of the first light source 220 and the center of the opposite surface of the light emitting surface of the second light source 221, May be less than or equal to the second distance (d3), which is the distance between the centers of the light emitting surfaces of the third light source (222).

The first distance d2 that is the distance between the center of the light emitting surface of the first light source 220 and the center of the opposite surface of the light emitting surface of the second light source 221 is the center of the light emitting surface of the first light source 220, Is smaller than the second distance d3 that is the distance between the center of the light emitting surface of the light source 222, the area where the light emitted from the first light source 220 and the light emitted from the third light source 222 overlap is reduced , It is possible to prevent the luminance from being uneven. The third distance d4 which is the horizontal distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222 is reduced so that the distance between the second light source 221 and the third light source 222 It is possible to prevent the brightness from becoming dark in the area.

In other words, as shown in FIG. 23, a region where the light emitted from the first light source 220 and the light emitted from the third light source 222 are overlapped with each other may be removed to prevent the brightness from being uneven.

The first distance d2 that is the distance between the center of the light emitting surface of the first light source 220 and the center of the opposite surface of the light emitting surface of the second light source 221 is equal to the center of the light emitting surface of the first light source 220 The light emitted from the first light source 220 and the light emitted from the third light source 222 overlap each other if the second distance d3 is a distance between the center of the light emitting surface of the third light source 222 and the second distance d3, And the third distance d4 which is the horizontal distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222 may be the maximum. In other words, it is possible to minimize the overlap of the light between the first light source 220 and the third light source 222, and to minimize the occurrence of the dark portion in the region between the second light source 221 and the third light source 222 There is an advantage to be able to do.

24, the area where the light emitted from the first light source 220 and the light emitted from the third light source 222 are overlapped with each other is minimized, and the second light source 221 and the third There is an advantage that the brightness can be minimized in the region between the light sources 223.

Therefore, the backlight unit according to an embodiment of the present invention has an advantage that uniform brightness can be provided over the entire surface of the backlight unit.

25 and 26, the second light source 221 and the third light source 222 are arranged such that the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222 form the same vertical line? As shown in FIG. That is, the third distance d4, which is the distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, can achieve the minimum distance.

26, it is possible to prevent the generation of dark portions between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, so that the backlight unit 200, which exhibits better luminance uniformity, Can be provided.

Meanwhile, in the backlight unit of the present invention, the first layer 210 on which the light sources 220 are disposed may be divided into a plurality of blocks.

27 and 28 are diagrams illustrating a backlight unit including two or more first layers 210. FIG.

27, a first optical assembly 10A and a second optical assembly 10B in which a plurality of light sources 220, 221, and 222 are respectively disposed on a first layer 210 may be disposed in contact with each other. The plurality of light sources respectively disposed in the first optical assembly 10A and the second optical assembly 10B may be arranged in the same arrangement with respect to each other.

More specifically, the first optical assembly 10A is provided with a first light source 220, which emits light in one direction, and is disposed on a diagonal line with the first light source 220, The third light source 222 may emit light in a direction opposite to the direction in which the light is emitted.

The second optical assembly 10B may include a second light source 221 disposed on the same horizontal line as the first light source 220 and emitting light in the same direction as the first light source 220. [

22, the first distance d2, which is the distance between the center of the light emitting surface of the first light source 220 and the center of the opposite surface of the light emitting surface of the second light source 221, The distance d3 between the center of the light emitting surface of the third light source 222 and the center of the light emitting surface of the third light source 222 may be equal to or less than the second distance d3.

27, a third light source 222 disposed in the first optical assembly 10A may be disposed adjacent the side of the first optical assembly 10A and disposed in the second optical assembly 10B The second light source 221 may be placed in contact with the side of the second optical assembly 10B.

The third distance d4 which is a distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222 is equal to the sum of the widths of the second light source 221 and the third light source 222 can do.

In particular, the second light source 221 and the third light source 222 may each have a width of about 1 to 2 mm. Therefore, in the case of the backlight unit including a plurality of optical assemblies in this embodiment, the minimum distance of the third distance d4, which is the distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, The sum of the widths of the first light source 221 and the third light source 222 may be the same.

29 and 30, the third distance d4, which is the distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222, is the distance between the second light source 221 and the third light source 222, May be greater than or equal to the sum 2t of the widths t of the light sources 222 and less than or equal to 10 times 10t of the widths t of the light sources 221 and 222. [ That is, d4 may be composed of 2t to 10t, and more preferably d4 may be composed of 3t to 8t.

The third distance d4 which is the horizontal distance between the light emitting surface of the second light source 221 and the light emitting surface of the third light source 222 is reduced so that the distance between the second light source 221 and the third light source 222 It is possible to prevent the brightness from becoming dark in the area of the display area.

Therefore, the backlight unit according to the present embodiment is configured such that the brightness is uneven between the first light source 220 and the third light source 222 or between the second light source 221 and the third light source 222 There is an advantage that it is possible to provide a backlight unit that exhibits better luminance uniformity.

31 and 32 are views showing a backlight unit according to an embodiment of the present invention.

31, a backlight unit according to an exemplary embodiment of the present invention includes a plurality of diffusion patterns 240 for facilitating light emitted from a light source 220 to an adjacent light source 225 on a reflective layer 240, (241) may be formed. The plurality of diffusion patterns 241 may diffuse or refract light emitted from the light source 220.

More specifically, referring to FIG. 32, the backlight unit 200 may include two or more light sources that emit light in different directions.

The backlight unit 200 may include a first light source 220 and a second light source 221 that laterally emit light in a direction parallel to the x axis, that is, in the same direction. A third light source 222 arranged perpendicular to the x-axis direction in which the first light sources 220 are arranged and emitting light in a direction opposite to the first light source 220 may be disposed. That is, the rows in which the first light sources 220 and the second light sources 221 are arranged and the rows in which the third light sources 222 are arranged may be arranged in an intersecting manner.

Therefore, by forming the light emission directions of the first light source 220, the second light source 221, and the third light source 222 in opposite directions to each other, the brightness of light is concentrated in a specific region of the backlight unit 200, The phenomenon of weakening can be reduced.

In this case, as the light emitted from each of the light sources 220, 221, and 222 advances, the brightness may be weakened. Accordingly, as the light is farther away from the light sources 220, 221, and 222, The brightness of the light emitted to the light emitting diode can be weakened.

Therefore, in the eighth embodiment of the present invention, a plurality of diffusion patterns 241 may be disposed between the light sources 220, 221, and 222. [ The plurality of diffusion patterns 241 may diffuse or refract light emitted from the light sources 220, 221, and 222 to emit light of a uniform brightness from the backlight unit 200.

The plurality of diffusion patterns 241 may include at least one of a metal or a metal oxide that is a reflective material and may be formed of a metal such as aluminum (Al), silver (Ag), gold (Ag), or titanium dioxide (TiO ₂ ) And a metal or metal oxide having a high reflectance as shown in FIG.

In this case, the plurality of diffusion patterns 241 may be formed by depositing or coating the metal or metal oxide on the first layer 210, or may be formed by printing metal ink. Here, as the deposition method, a vacuum deposition method such as a thermal deposition method, an evaporation method, or a sputtering method can be used. As the coating or printing method, a printing method, a gravure coating method, or a silk screen method can be used.

Further, in order to improve the effect of diffusion or refraction of the plurality of diffusion patterns 241, the color of the plurality of diffusion patterns 241 may have a color having a high brightness, for example, a color close to white.

The plurality of diffusion patterns 241 may be composed of a plurality of dots each including the material. For example, the plurality of diffusion patterns 241 may be formed of circular dots in each planar shape, and may be elliptical or polygonal.

The plurality of diffusion patterns 241 may increase in density from one light source to another adjacent light source. For example, the density may increase from the first light source 220 to the second light source 221. Accordingly, it is possible to prevent the luminance of the light emitted upward from the region remote from the first light source 220, that is, the rear region of the second light source 221, to be reduced, The brightness can be kept uniform.

For example, a plurality of diffusion patterns 241 made up of dots may increase the interval between two adjacent diffusion patterns from the light emitting surface of the first light source 220 toward the second light source 221, The light emitted from one light source 220 may be diffused or refracted toward the second light source 221 and the brightness may be uniformly maintained.

In particular, the plurality of diffusion patterns 241 may not exist in a region adjacent to each of the light sources 220, 221, and 222. Accordingly, the light emitted from the light sources 220, 221, and 222 is totally reflected by the lower reflective layer 240 in the region where the diffusion patterns 241 do not exist, and the diffusion patterns 241 The brightness of the entire region including the region adjacent to the light sources 220, 221, and 222 can be uniformly maintained.

A plurality of diffusion patterns 241 may be arranged in a line on the diagonal line between the first light source 220 and the third light source 222. Since the directions of the light emitted from the first light source 220 and the light emitted from the third light source 222 are opposite to each other, the light from the first light source 220 and the light from the third light source 222 The luminance can be increased in the region where it can be overlapped. Accordingly, a plurality of diffusion patterns 241 are positioned on the diagonal lines of the first light source 220 and the third light source 222, thereby preventing an increase in brightness in the overlap region of light.

32, the planar shape formed by the plurality of diffusion patterns 241 arranged in the direction in which the light of the first light source 220 is emitted is a plane shape in which the light of the third light source 222 is emitted The plurality of diffusion patterns 241 may be symmetrical with each other.

For example, the planar shape formed by the plurality of diffusion patterns 241 arranged in the direction in which the light beams from the first light source 220 and the third light source 222 are respectively emitted may have a fan shape.

This sector shape is arranged so as to correspond to a direction of the light emitted from the light source of about 120 degrees, thereby efficiently transmitting and diffusing the light emitted from the light source, so that the overall luminance of the backlight unit can be uniformly maintained.

Referring to FIG. 33, the reflective layer 240 of the backlight unit 200 may have two or more reflectances. For example, the reflectance of the reflective layer 240 may be different depending on the formed positions. have. That is, the reflective layer 240 may include two or more regions, each having different reflectance.

Referring to FIG. 33, the reflective layer 240 may include a first reflective layer 242 and a second reflective layer 243 having different reflectivities. The first and second reflective layers 242 and 243 ) Can be alternately arranged and configured.

For example, the first and second reflective layers 242 and 243 may be formed of reflective sheets composed of different materials, or a specific material may be applied to any one of the first and second reflective layers 242 and 243, The reflectance of the first and second reflective layers 242 and 243 can be different from each other.

According to an embodiment of the present invention, the first and second reflective layers 242 and 243 may be formed of one reflective sheet that is not physically separated. In this case, the first and second reflective layers 242 and 243 having different reflectivities as described above can be formed by forming a pattern for adjusting the reflectance on at least a part of the reflective sheet.

That is, the reflectance can be adjusted by forming a pattern in at least one of the region corresponding to the first reflective layer 242 and the region corresponding to the second reflective layer 243 of the reflective layer 240. For example, It is possible to form a pattern in a region corresponding to the second reflective layer 243 shown in FIG. 33 of the reflective layer 240 composed of a sheet to adjust the reflectance of the corresponding region.

More specifically, the protruding patterns for diffusing light can be formed on the upper surface of the region of the reflective layer 240 corresponding to the second reflective layer 243, thereby forming a region corresponding to the second reflective layer 243 Can be reduced. In this case, the light diffusion effect in the region corresponding to the second reflective layer 243 of the reflective layer 240 can be improved, so that the light emitted from the light source 220 can reach the region disposed in the adjacent light source 222 It can be uniformly diffused.

The first and second reflective layers 242 and 243 may have different surface roughness. For example, by making the surface roughness of the second reflective layer 243 higher than the surface roughness of the first reflective layer 242, The reflectance of the reflective layer 243 may be lower than that of the first reflective layer 242.

The first reflective layer 242 adjacent to the light sources 220, 221, and 222 may be formed of a specular reflection sheet on the basis of the direction in which the light is emitted from the first and second reflective layers 242 and 243, The second reflective layer 243 may be a diffuse reflection sheet.

The first reflective layer 242 may reflect light incident obliquely from the light sources 220, 221, and 222 at an angle of reflection equal to the incident angle, So that it can be made to proceed in the direction toward the adjacent light source.

On the other hand, the diffuse reflection sheet can be observed as if the incident light is diffused and reflected at various angles due to irregular reflection occurring on the rough surface on which the irregularities are formed, and accordingly, the second reflection layer 243 is formed by the light sources 220, And then diffuse the traveling light so as to be emitted in the upward direction.

In an embodiment of the present invention, the second reflective layer 243, which is a diffuse reflective sheet, may be formed by processing the surface of the reflective sheet to form irregularities, or by forming a diffuse reflective material such as titanium dioxide (TiO ₂ ) Or may be formed by adding or densifying it at a high density.

In this case, the reflectance of the first reflective layer 242 may be higher than that of the second reflective layer 243, so that the light reflected from the first reflective layer 242 from the light sources 220, 221, And the second reflection layer 243 generates diffuse reflection, so that light can be emitted upward.

The first reflective layer 242 adjacent to the light sources 220, 221 and 222 is formed of a regularly reflective sheet having a high reflectance on the basis of the direction in which the light is emitted as described above, The brightness of light in the region adjacent to the light sources 220, 221, and 222 is concentrated and the brightness of light in the region far from the light sources 220, 221, and 222 is weakened .

The second reflective layer 243 away from the light sources 220, 221, and 222 is formed of a diffuse reflection sheet having a relatively low reflectance on the basis of the direction in which the light is emitted, So that the light emitted from the light sources 220, 221, and 222 travels up to the adjacent light sources to compensate for the reduced brightness, thereby reducing the brightness of the light in the regions far from the light sources 220, 221, and 222 Can be reduced.

On the other hand, the regular reflection sheet constituting the first reflection layer 242 is formed by regularly reflecting the light emitted from the light sources 220, 221, and 222 and advancing in the direction of the adjacent light source, and at the same time, Scattered and emitted toward the display panel 100.

The diffuse reflection sheet constituting the second reflection layer 243 may be manufactured by processing the surface of the sheet made of the same material as the regular reflection sheet or forming a plurality of protruding patterns on the surface.

The light brightness of an area adjacent to the light sources 220, 221 and 222 and an area far from the light sources 220, 221 and 222 can be similarly controlled, It is possible to provide a uniform light luminance to the display panel 100 in the entire area.

In order to allow the light emitted from the light sources 220, 221 and 222 to travel to the region where the adjacent light sources are disposed, the first reflection layer 242 adjacent to the light sources 220, 221 and 222, The width w1 may be set to a value larger than the width w2 of the second reflective layer 243. However, the width w1 of the first reflective layer 242 may be equal to or less than the width w2 of the second reflective layer 243, in which case the first reflective layer 242 and the second reflective layer 243 The reflectance can be adjusted so as to achieve the above-described effects.

As the width w1 of the first reflective layer 242 decreases, the progress of light emitted from the light sources 220, 221, and 222 may be reduced, and accordingly, the distance from the light sources 220, 221, The brightness of the light in the region can be weakened.

When the width w1 of the first reflective layer 242 is greatly increased compared to the width w2 of the second reflective layer 243, light can be concentrated in a region far from the light sources 220, 221, and 222 For example, the brightness of light in an intermediate region between two adjacent light sources 220 and 222 may be weaker than an area away from the light sources 220, 221 and 222.

Accordingly, the light emitted from the light sources 220, 221, and 222 effectively travels up to the region where the adjacent light sources are disposed, and is emitted upward to provide the light of uniform luminance to the display panel 100 in the entire region of the backlight unit 200 The width w1 of the first reflective layer 242 may be in the range of 1.1 times to 1.6 times the width w2 of the second reflective layer 243. [

33, the first light source 220 and the second light source 221 disposed adjacent to each other in the y-axis direction are formed at positions where the first reflective layer 242 does not overlap with the first reflective layer 242, Can be disposed outside the region.

The third light source 222 and the second light source 221 adjacent to the first light source 220 in the x-axis direction may be disposed in an area where the second reflective layer 243 is formed.

For example, the second reflective layer 243 may be formed with holes (not shown) into which the second light source 221 and the third light source 222 can be inserted, The second and third light sources 221 and 222 mounted on the substrate 210 disposed on the second reflective layer 243 protrude upward through the holes of the second reflective layer 243 to emit light in the lateral direction.

Since the positions of the light sources 220, 221 and 222 shown in FIG. 33 are only an embodiment of the present invention, the light sources 220, 221 and 222 and the first and second reflective layers 242 and 243 Can be varied.

FIG. 34 is a cross-sectional view illustrating a configuration of a backlight unit according to an embodiment of the present invention.

34, a first layer 210 as described with reference to FIGS. 17 to 33, a plurality of light sources 220 formed on the first layer, a second layer 210 surrounding the plurality of light sources 220, The reflective layer 230 and the reflective layer 240 may be constituted by one optical assembly A and the backlight unit 200 may be constituted by arranging a plurality of such optical assemblies A adjacent to each other.

Meanwhile, the plurality of optical assemblies A provided in the backlight unit 200 may be arranged in a matrix of N and M (N and M are natural numbers of 1 or more) in the x-axis and y-axis directions, respectively.

As shown in FIG. 34, the backlight unit 200 can be arranged in a 7x3 array of 21 optical assemblies (A). However, since the configuration shown in FIG. 34 is only an example for describing the backlight unit according to the present invention, the present invention is not limited thereto and can be changed according to the screen size and the like of the display device.

For example, in the case of a display device having a size of 47 inches, the backlight unit 200 can be configured by disposing 240 optical assemblies A in the 24 × 10 array as described above.

Each optical assembly A may be fabricated as an independent assembly and may be closely spaced to form a modular backlight unit. Such a modular backlight unit can provide light to the display panel 100 as backlight means.

As described above, the backlight unit 200 may be driven by the entire driving method or a partial driving method such as local dimming, impulsive, or the like. The driving method of the backlight unit 200 may be variously changed according to the circuit design, but is not limited thereto. Thus, in the embodiment, the color contrast ratio is increased and the image of the bright part and the dark part on the screen can be expressed clearly, thereby improving the image quality.

That is, the backlight unit 200 is divided into a plurality of divided driving regions, and the luminance of the divided driving region is correlated with the luminance of the image signal to reduce the luminance of the black portion of the image and increase the luminance of the bright portion , The contrast ratio and sharpness can be improved.

For example, only a portion of the plurality of optical assemblies A shown in FIG. 34 may be independently driven to emit light upwardly, with the light sources 220 included in each of the optical assemblies A for that purpose, Can be independently controlled.

Meanwhile, the area of the display panel 110 corresponding to one optical assembly A may be divided into two or more blocks, and the display panel 100 and the backlight unit 200 may be dividedly driven in units of blocks .

According to the embodiment of the present invention, the backlight unit 200 may be divided into a plurality of blocks and driven for each of the divided blocks, and the brightness of each of the divided blocks is correlated with the brightness of the video signal, The black portion reduces the brightness and the bright portion increases the brightness, thereby improving the contrast ratio and sharpness.

For example, when the backlight unit 200 is driven in the local dimming mode, the display panel 100 may have a plurality of divided areas corresponding to each of the blocks of the backlight unit 200, The brightness of light emitted from each of the blocks of the backlight unit 200 can be adjusted according to the brightness level of each of the divided regions of the backlight unit 200, for example, the peak value of the gray level or the color coordinate signal.

That is, the plurality of light sources included in the backlight unit 200 may be divided into a plurality of blocks, and each divided block may be driven.

The block is a basic unit in which a plurality of light sources provided in the backlight unit 200, more specifically the backlight unit 200, is supplied with driving power for emitting light, that is, the light sources included in one block are turned on simultaneously turn on or turn off and emit light of the same brightness at turn-on. In addition, the light sources included in different blocks of the backlight unit 200 may receive different driving power sources and emit light having different brightness.

By constructing the backlight unit 200 by assembling a plurality of optical assemblies A as described above, it is possible to simplify the manufacturing process of the backlight unit 200 and to minimize the loss that may occur in the manufacturing process The productivity can be improved. In addition, the backlight unit 200 can be applied to various sizes of backlight units by mass-producing the optical assembly A in a standardized standard.

Meanwhile, when any one of the plurality of optical assemblies A provided in the backlight unit 200 is defective, it is not necessary to replace the entire backlight unit 200, but only the defective optical assembly can be replaced, And the cost of replacing parts is reduced.

On the other hand, the optical assembly (A) and the light sources 220 as shown in FIG. 34 are only an embodiment of the present invention, and the present invention is not limited thereto. For example, the optical assembly A and the light sources 220 provided in the backlight unit 200 may have a configuration as shown in FIG.

FIG. 36 is a cross-sectional view illustrating the configuration of a display device according to an embodiment of the present invention, and a description of the same components as those described with reference to FIGS. 1 to 21 of the display device shown in FIG.

36, a display panel 100 including a color filter substrate 110, a TFT substrate 120, an upper polarizer 130 and a lower polarizer 140, a first layer 210, The backlight unit 200 including the first layer 220 and the second layer 230 may be formed in close contact with each other.

For example, an adhesive layer 150 may be formed between the backlight unit 200 and the display panel 100 so that the backlight unit 200 may be adhered and fixed to the lower surface of the display panel 100.

More specifically, the upper surface of the backlight unit 200 can be adhered to the lower surface of the lower polarizer 140 using the adhesive layer 150. The backlight unit 200 may further include a diffusion sheet (not shown), and the diffusion sheet (not shown) may be disposed in close contact with the upper surface of the second layer 230. In this case, an adhesive layer 150 may be formed between the diffusion sheet (not shown) of the backlight unit 200 and the lower polarizer 140 of the display panel 100.

A back cover 35 may be disposed on the lower side of the backlight unit 200 and a back cover 35 may be formed on the lower side of the first layer 210 in close contact with the back cover 35.

The display device may include a power supply unit 55c for supplying a driving voltage to the display module 20 and more specifically to the display panel 100 and the backlight unit 200. For example, The plurality of light sources 220 provided in the light emitting units 200 may be driven by using a voltage supplied from the power supply unit 55c to emit light.

The power supply unit 55c may be disposed and fixed on the back cover 35 surrounding the rear surface of the display module 20 so that the power supply unit 55c can be stably supported and fixed.

According to an embodiment of the present invention, a first connector 310 may be formed on the rear surface of the first layer 210. For this purpose, a hole for inserting the first connector 310 is formed in the back cover 35, a hole 350 may be formed.

The first connector 310 electrically connects the light source 220 and the power supply unit 55c so that the driving voltage can be supplied from the power supply unit 55c to the light source 220. [

For example, the first connector 310 is formed on the lower surface of the first layer 210, and is connected to the power supply unit 55c using the first cable 420, The driving voltage supplied from the supplying unit 55c can be transmitted to the light source 220. [

An electrode pattern (not shown), for example, a carbon nanotube electrode pattern may be formed on the top surface of the first layer 210. The electrode formed on the upper surface of the first layer 210 contacts the electrode formed on the light source 220 to electrically connect the first connector 310 and the light source 220.

The display device may include a drive control unit 55a for controlling the driving of the display panel 100 and the backlight unit 200. For example, the drive control unit 55a may include a timing controller .

The timing controller controls the driving timing of the display panel 100 and more specifically includes a data driver (not shown), a gamma voltage generator (not shown) and a gate driver (not shown) provided in the display panel 100, And supplies the generated signal to the display panel 100. [0050]

The timing controller synchronizes a driving timing of the light sources 220 with the backlight unit 200 and more specifically the light sources 220 in synchronization with the driving of the display panel 100. [ Unit 200 as shown in FIG.

36, the drive control unit 55a may be disposed and fixed on the back cover 35 disposed on the rear surface of the display module 20 in order to stably support and fix the drive control unit 55a. have.

According to an embodiment of the present invention, a second connector 320 may be formed on the substrate 210, and a hole 350 for inserting the second connector 320 is formed in the back plate 50 .

The second connector 320 may electrically connect the first layer 210 and the drive control unit 55a to supply the control signal output from the drive control unit 55a to the first layer 210. [

For example, the second connector 320 is formed on the lower surface of the first layer 210, and is connected to the drive control unit 55a using the second cable 430 to be driven through the second cable 430 And can transmit the control signal supplied from the control unit 55a to the light source driving unit.

A light source driver (not shown) may be formed on the first layer 210. The light source driver (not shown) may be connected to the first layer 210 using a control signal supplied from the drive controller 55a through the second connector 320 The light sources 220 can be driven.

The power supply unit 55c and the drive control unit 55a may be enclosed by the drive unit cover 40 to be protected from the outside.

The structure of the display device shown in FIG. 36 is merely an embodiment of the present invention, and accordingly the power supply unit 55c, the drive control unit 55a, the first and second connectors 310 and 320, 2 cables 420 and 430 can be changed as needed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications other than those described above are possible. For example, each component specifically shown in the embodiments of the present invention 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 (20)

A display module;
A front panel disposed in front of the display module and including a rim bent rearward; And
And a first support member having one side fixed to the display module,
Wherein the rim of the front panel includes a transmissive area having a concave outer surface. 2. The apparatus of claim 1, wherein the first support member
And is disposed so as to overlap at least a part of the transmissive region of the front panel. The method according to claim 1,
Wherein an inner surface of the transmissive area is flat. The method of claim 3,
Wherein one surface of the first support member is formed to be parallel to an inner surface of the transmissive region. The method according to claim 1,
Wherein an outer surface of the transmissive region has a curvature of 10 to 20. [ The method according to claim 1,
Wherein at least a part of the first support members is exposed to the front side through a transmission region of the front panel. The method according to claim 1,
And a fixing member for fixing the first supporting member to the display module. 8. The method of claim 7,
And a bottom cover for covering the display module from behind,
Wherein the fixing member fixes the bottom cover to one side of the first supporting member. 9. The apparatus according to claim 8, wherein the fixing member
And a screw that is fixed to the bottom cover through one side of the first support member. 10. The apparatus according to claim 9, wherein the fixing member
And a screw fixed to the second surface of the first support member through the bottom cover. 2. The apparatus of claim 1, wherein the first support member
The display device is provided on at least one of the left side and the right side of the display device. 12. The method of claim 11,
And a second support member provided on at least one of the upper side and the lower side of the display device. 13. The apparatus according to claim 12, wherein the second support member
Wherein one side is fixed to the back surface of the front panel and the other side is fixed to the display module. 13. The method of claim 12,
The first support member and the second support member
A seating part on which a front edge part of the display panel included in the display module is seated; And
And a bent portion bent rearward from the seat portion and to which the display module is fixed. 15. The method of claim 14,
And a seating portion of the second support member is fixed to a rear surface of the front panel. 16. The method of claim 15,
And a bonding member formed between the seating portion of the second supporting member and the front panel. 15. The method of claim 14,
Wherein the seating portion of the first supporting member is not fixed to the front panel. 15. The method of claim 14,
Wherein the width of the seating portion of the first supporting member is smaller than the width of the seating portion of the second supporting member. 13. The method of claim 12,
Wherein at least one of the first and second support members is formed of an aluminum (Al) extrusion bar. The display device of claim 1, wherein the display module
A display panel; And a backlight unit,
The backlight unit
A first layer;
A plurality of light sources formed on the first layer; And
And a second layer disposed above the first layer and configured to surround the plurality of light sources.

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