KR20170000381A - a backlight unit including a curved back-plate, and a curved display apparatus using the same - Google Patents

Abstract

The present invention relates to a backlight unit for providing light to a curved display device, and a curved display device using the same. According to an embodiment of the present invention, the backlight unit of the curved display device, which provides light to a curve-shaped display panel, comprises: a light source for providing light to the display panel; and a bent curve-shaped back plate having a curved shape by being bent into a plurality of flat surfaces so as to have a preset width along the circumferential direction of the display panel on a concentric circle having the same center as the center of curve of the display panel, and including a back plate on which the light source is installed. Therefore, backlight units of various shapes can be manufactured at low cost.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a backlight unit including a curved back plate, a curved back-plate, and a curved display apparatus using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit for providing light to a curved display device and a curved display device using the same.

2. Description of the Related Art Generally, a display device is an apparatus for displaying an image, and includes a display panel for displaying an image and a backlight unit for providing light for viewing a bright image.

In recent years, a display device has been developed with a curved display device that is curved in a curved shape instead of a flat screen in order to increase the immersion feeling while the screen is becoming larger with the development of technology.

In addition to the display panel, the curved display device may be formed as a curved surface to provide uniform light to the curved display panel.

The backlight unit of the related art has a backlight unit corresponding to a curved surface of a display panel to form a back plate in a curved shape and a backlight unit spaced apart from the backlight unit by a predetermined distance so as to uniformly provide light to a curved back plate. Respectively.

However, in the conventional backlight unit, a mold is required to manufacture the back plate in a curved shape, and a precise design is required in order to arrange the light source so that the light is uniformly irradiated on the curved surface, and the manufacturing cost of the backlight unit is high .

Further, there has been a problem in that a backlight unit must be newly manufactured every time in order to reinforce a deficient light quantity or to provide a light source to a curved display device in various ways.

Korean Patent Publication No. 10-2014-0065577 (published on May 30, 2014) Korean Patent Publication No. 10-2014-0007202 (published on Jan. 17, 2014) Korean Patent Laid-Open No. 10-2011-0025493 (published on October 3, 2011) Korean Patent Publication No. 10-2013-0020302 (published Feb. 27, 2013)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a back plate, which is capable of easily designing a mounting position of a light source The present invention also provides a backlight unit including a folded back plate capable of easily providing various types of backlight units and a curved display unit using the backlight unit.

According to an aspect of the present invention, there is provided a backlight unit of a curved display device for providing light to a curved display panel, including: a light source for providing light to the display panel; And a back plate having a curved surface shape bent in a plurality of planes so as to have a predetermined width along a circumferential direction of the display panel on a concentric circle having the same center and including a back plate on which the light source is installed have.

The back plate may have a curved shape in which the distance between the inscribed circle and the circumscribed circle of the back plate is not less than 5 mm and not more than 20 mm.

The back plate may include a rim portion which is installed at a part of the periphery of the back plate or the entire periphery of the back plate to reinforce the rigidity or in which the light source is installed.

And a light diffusion sheet for diffusing light emitted from the light source to provide the light to the display panel.

The light diffusion sheet may include an optical pattern to provide light in a direction in which the display panel is positioned in a light source disposed around the light diffusion sheet.

The light diffusion sheet may be formed in a curved shape corresponding to the display panel.

And a spacing member for separating and fixing the light diffusion sheet in the light source.

The back plate may include a spacing fixing part for bending a part of the back plate to separate and fix the light diffusion sheet in the light source.

The back plate may include a light source installation hole through which a part of the back plate passes, so that the light source is irradiated to both sides of the back plate, and the light source is installed on a part or the entire periphery.

And a light guide plate having optical patterns formed on both sides thereof so that the light of the light source provided on the light source installation hole is irradiated to both sides of the back plate.

The light source may be installed on both sides of the back plate.

A curved display device using a backlight unit including a curved curved back plate according to an exemplary embodiment of the present invention includes the backlight unit according to the above embodiment and the curved display unit provided on either or both surfaces of the backlight unit And may include a display panel curved in a curved shape.

According to the present invention, since the back plate is bent and formed into a curved surface shape, a mold for manufacturing a curved surface type backlight unit is not required, so that the manufacturing cost can be reduced, and a light source is provided on the bent surface, This is easy.

In addition, it is possible to provide various types of backlight units that are not only a direct-down type but also an edge type or a combination of two, by forming a rim portion, and also provide a backlight unit having enhanced rigidity and improved durability.

Further, it is possible to provide a curved surface display device of a double-sided type sharing one backlight unit.

1 is an exploded perspective view of a display device using a backlight unit including a curved curved back plate according to a first embodiment of the present invention.
2 is a side sectional view of Fig.
3 is an exploded view of a back plate in a backlight unit including a curved curved back plate according to Embodiment 1 of the present invention.
Fig. 4 is a partially enlarged view schematically showing the bent shape of the back plate of Fig. 3; Fig.
5 is a side cross-sectional view of a display device using a backlight unit including a curved curved back plate according to a second embodiment of the present invention.
6 is an exploded perspective view of a display device using a backlight unit including a curved curved back plate according to a third embodiment of the present invention.
7 is a plan sectional view of Fig.
FIG. 8 is a perspective view of a display device using a backlight unit including a bent curved back plate according to a fourth embodiment of the present invention.
9 is a plan sectional view of Fig.
10 is an exploded perspective view of a display device using a backlight unit including a curved curved back plate according to a fifth embodiment of the present invention.
11 is a side sectional view of Fig.
12 is an exploded perspective view of a display device using a backlight unit including a curved curved back plate according to a sixth embodiment of the present invention.
13 is a side sectional view of Fig.
14 is an exploded perspective view of a display device using a backlight unit including a curved curved back plate according to a seventh embodiment of the present invention.
15 is a side sectional view of Fig.

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

1 to 15, a backlight unit 100 including a curved curved back plate according to an embodiment of the present invention may include a light source 130.

The light source 130 may provide light for the spectator to view an image displayed on the display panel 200.

Meanwhile, the light source 130 may be an LED lamp or an LED module in which a plurality of LED lamps are arranged on a circuit board.

The light source 130 may be attached to the back plate 110 with an adhesive or may be attached to the back plate 110 with a coupling member such as a bolt or a rivet. have.

The arrangement of the light sources 130 will be described in detail below.

1 to 15, a backlight unit 100 including a curved curved back plate according to an exemplary embodiment of the present invention may include a back plate 110.

The back plate 110 may support the light source 130 and may serve as a cover of the backlight unit 100.

On the other hand, the back plate 110 is a plane having a predetermined width L along the circumferential direction of the display panel 200 on a concentric circle having the same origin as the origin of the display panel 200 curved in a curved shape, (Hereinafter referred to as a curved surface shape) so that the angle R1 formed by the other surface adjoining the other surface may be an angle of a predetermined range, or may be formed by dividing the surface by an arbitrary angle R2 from the origin As shown in FIG.

For example, the back plate 110 may be formed so as to have a bent curved surface shape by arranging a plurality of rectangular flat plates in the circumferential direction so as to face the origin of the display panel 200.

At this time, the curved surface shape of the back plate 110 may be formed by bending one plate into a plurality of rectangular shapes, but may also be formed by connecting the ends of a plurality of rectangular plates to each other .

Here, the width L of each bent surface of the back plate 110 may be different from each other. When there are a plurality of origin points of the curved surface of the display panel 200, The angle R1 can be bent so as to be different from each other.

In addition, although the display panel 200 is shown with the display panel 200 bent obliquely upward and downward about the horizontal axis, the display panel 200 can be bent upward and downward about the horizontal axis, Or may be a concave or convexly curved display panel 200.

3, when the back plate 110 is formed in a bent curved shape, it is not necessary to manufacture a mold for molding because it can be manufactured by bending the plate, The manufacturing cost can be reduced, the installation position of the light source 130 can be easily set, and the illuminance can be improved by irradiating light in a direction perpendicular to the display panel 200.

In addition, when the back plate 110 is formed in a bent curved shape, it is possible to prevent deformation and breakage due to an external force which may occur.

4, the back plate 110 having a bent curved surface has a distance D between an inscribed circle CI and a circumscribed circle CO of 0.2 mm to 20 mm Lt; / RTI >

As the distance D between the inscribed circle CI and the circumscribed circle CO of the back plate 110 becomes narrower, the number of the bent portions becomes larger and the distance D between the inscribed circle CI and the circumscribed circle CO The wider the width, the smaller the number can be bent. For example, as the number of polygonal angles increases, the interval between the inscribed circle (CI) and the circumscribed circle (CO) becomes narrower.

When the distance between the inscribed circle CI and the circumscribed circle CO of the back plate 110 is less than 1 mm, the width L of the bent portion is small and it is difficult to provide the light source 130. When the distance is more than 20 mm, It is difficult to exhibit the bending effect described above because the width L is wide.

The back plate 110 may be formed as a reflecting surface that reflects light so that the light source 130 is installed on the back plate 110 to function as a reflector. The back plate 110 has high heat dissipation It may be formed of aluminum or stainless steel plate having a reflecting surface.

A light source 130 is installed on the back plate 110. The light sources 130 may be arranged in a straight line in the center of the bent surface of the back plate 110, It can also be installed in the form of.

Here, the number of the bent surfaces of the back plate 110 may be the same as the number of the light sources 130 to be arranged in the circumferential direction, and the light source 130 may have a bent surface and a surface Or may be provided on both the portion where the surface and the surface meet and the surface that is flat.

Also, the light sources 130 may be provided on both sides of the back plate 110 (see FIG. 5).

The rim portions 111 and 113 are provided with a light source 130 on the inner side so as to irradiate light around the light diffusion sheet 150 and can reinforce the rigidity of the back plate 110.

On the other hand, the rim portions 111 and 113 may protrude from the back plate 110 in a part of or around the periphery of the back plate 110.

Here, a part of the periphery of the back plate 110 may be, for example, the left and right ends of the back plate 110 or the upper and lower ends 113 of the back plate 110.

The frame parts 111 and 113 may be integrally formed around one opened back plate 110 and bent to be erected on the back plate 110 or may be formed by bending the back plate 110 into a curved shape, The edge portions 111 and 113 may be formed around the periphery of the curved back plate 110 so as to correspond to the bent curved surface.

The edge portions 111 and 113 are positioned on both sides of one opened back plate 110 and the edge portions 111 and 113 are formed on both sides of each side of the folded back plate 110, (111, 113) were formed on the back plate (110) by bending.

When the backing plate 110 is formed integrally with the backing plate 110, the edge portions 111 and 113 are formed so that both ends of the edgeing portions 111 and 113 are located outside (See FIG. 3).

For example, when the portions of the rim portions 111 and 113 are spread out in a plane, both ends of the rim portions 111 and 113 may be formed in a trapezoidal shape in which the area becomes gradually narrower toward the outer side.

When the back plate 110 is formed in a bent curved shape, the abutting portions of the rim portions 111 and 113 may be welded to each other or joined to each other by an adhesive or a joining member such as a bolt or a rivet.

Meanwhile, the light source 130 may be installed on one or both of the rim portions 111 and 113 and the bent surface of the back plate 110.

Further, the back plate 110 may include a light source mounting hole 115 (see Figs. 14 and 15).

The light source mounting hole 115 is formed on the bent or bent surface of the back plate 110 so as to provide the light of the light source 130 to the front and back surfaces of the back plate 110 with the back plate 110 interposed therebetween. And a light source 130 may be provided around the inner periphery of the light guide plate 120. [

Meanwhile, when the light source mounting hole 115 is formed in the back plate 110, the back plate 110 may include a light guide plate.

The light guide plate may be provided at the center of the light source installation hole 115 to diffuse the light from the light source 130 installed on the inner circumference of the light source installation hole 115 to the front and back surfaces of the back plate 110.

The light guide plate may have a long length in the longitudinal direction of the bent surface of the back plate 110.

At this time, optical patterns may be formed on both sides of the light guide plate so that light of the light source 130 may be radiated in a direction in which the display panel 200 positioned on each surface is positioned. And the light guide plate may be embodied as the light diffusion sheet 150 according to the embodiment.

For example, when the light source mounting holes 115 are provided on the inner circumferences of the light source mounting holes 115 facing each other, for example, The light source 130 provided on one of the inner circumferential surfaces of the light source 130 irradiates light of the light source 130 in a direction in which the display panel 200 formed with a concave curved surface is positioned, The installed light sources 130 may be formed to have different patterns so as to irradiate light of the light source 130 in a direction in which the display panel 200 formed with a convex curved surface is positioned.

Of course, the light source 130 installed in the light source installation hole 115 may be installed on any one of the upper, lower, left, and right sides of the light source 130, In addition to the hole 115, it may be selectively installed on the bent surface of the back plate 110 and the rim 111 as well.

The backlight unit 100 having the bent curved surface type backlight unit 100 according to the embodiment of the present invention may include the light diffusion sheet 150. [

The light diffusing sheet 150 can diffuse the light of the linear light source 130 and provide it to the display panel 200 so that the light of the light source 130 can be uniformly irradiated on the display panel 200 .

The light diffusion sheet 150 may be disposed at the front most position where the display panel 200 is located in the backlight unit 100 to prevent heat generated in the light source 130 from being transmitted to the display panel 200. [ The light diffusion sheet 150 may be formed to have a predetermined thickness so as to have rigidity like a panel. The light diffusion sheet 150 may be formed as a curved surface corresponding to the curved surface of the display panel 200.

The light diffusing sheet 150 is formed such that the light source 130 disposed around the light diffusing sheet has an optical pattern such that light is irradiated onto either or both surfaces of the light diffusing sheet 150, And the light diffusion sheet 150 may be realized as a light guide plate.

Here, the light diffusion sheet 150 is formed of a polymer-based material having excellent thermosetting property, thermoplasticity, or heat resistance, and is formed by heating the light diffusion sheet 150 so as to have a curved surface corresponding to the curved surface of the display, .

At this time, the light diffusion sheet 150 is heated to a temperature within 10 占 폚 lower than the glass transition temperature of the polymer, bent to a curved surface in a form of slow cooling for 24 hours Can be produced.

A backlight unit 100 including a curved curved back plate 110 according to an embodiment of the present invention may include a spacing member 170 (see FIGS. 5 and 7).

The spacing member 170 may separate the light diffusion sheet 150 from the back plate 110 such that the light diffusion sheet 150 does not contact the light source 130.

The spacing member 170 may be disposed between the back plate 110 and the light diffusion sheet 150 and the spacing member 170 may be formed in a shape corresponding to the periphery of the light diffusion sheet 150 And the spacing member 170 may be formed along the bent curved shape of the rim 111 when the rim member 170 is provided at the rim 111 of the back plate 110.

The spacers 111 and 113 are bent inward to form spacing fixing parts (not shown), and the light diffusion sheet 150 is mounted on the spacing fixing parts. The sheet 150 may be configured to be spaced apart.

A backlight unit 100 including a curved back plate according to an embodiment of the present invention will be described below with reference to a curved display using a backlight unit including a curved back plate according to an embodiment of the present invention. Various embodiments applied to the apparatus 300 will be described.

First, a curved display apparatus 300 using a backlight unit including a curved curved back plate according to an exemplary embodiment of the present invention may include a display panel 200.

The display panel 200 displays an image, and may include a first substrate, a second substrate, and a liquid crystal layer disposed between the first substrate and the second substrate.

Here, when either one of the first substrate and the second substrate is a color filter substrate, the other may be a thin film transistor substrate, and the liquid crystal layer may be a vertically or horizontally oriented polymer.

The color filter substrate may have a plurality of filters overlapped with each other, and may be sealed with a sealing material between the first substrate and the second substrate to prevent the liquid crystal layer from flowing out to the outside.

Meanwhile, the display panel 200 may include a driving circuit substrate for driving the display panel 200.

The display panel 200 may be a display panel 200 curved in a curved shape. The display panel 200 may be curved in a state in which the thickness thereof is thinly etched and curved to maintain a curved shape, The display panel 200 may be curved in a curved shape by a transparent plate or a frame frame having a curved shape. Alternatively, the flexible display panel 200 may be fixed in a case of the curved display device 300 And may be formed in a curved shape.

The display panel 200 may be disposed in front of the backlight unit 100 such that the viewing side of the image is directed to the outside. In the case of the double-sided curved display device 300, the backlight unit 100 They can be arranged in the middle and in front and rear respectively.

At this time, in the case of the double-sided curved display device 300, the display panel 200 positioned on either side with the backlight unit 100 therebetween is a concave display panel 200 The display panel 200 positioned on the other side may be a display panel 200 having a convex surface for viewing an image.

[Example 1]

As shown in FIGS. 1 and 2, a curved display device 300 using a backlight unit including a curved curved back plate according to the first embodiment includes a curved display unit 300, And a backlight unit 100 is provided at the back thereof.

The backlight unit 100 has a curved surface in which the surface on which the light source 130 is installed is formed in the most basic form and the light source 130 is installed on each of the bent surfaces.

At this time, the rim portions 111 and 113 may or may not be selectively formed on the back plate 110, and the light source 130 may be provided on a tangent line where the surfaces of the back plate 110 are not the bent surfaces. It is possible.

A light diffusion sheet 150 for diffusing light to the front of the light source 130 and providing the light to the display panel 200 may be selectively installed in front of the light source 130, The light diffusing sheet 150 may be spaced apart from the light source 130 by providing spacing members 170 around the back plate 110 when the rim portions 111 and 113 are not formed.

At this time, the light diffusion sheet 150 may be spaced apart from the light source 130 by a spacing fixing part formed by bending the periphery of the back plate 110 instead of the spacing member 170.

In the curved display device 300 using the backlight unit including the curved back plate according to the first embodiment, the light from the light source 130 is uniformly diffused through the light diffusion sheet 150 So that the spectator can view the image through the display panel 200.

Therefore, when the light source 130 is installed on the surface to be bent, the light sources 130 are arranged at predetermined intervals along the curved surface of the curved display, so that the installation position of the light source 130 can be easily set, (300) can be manufactured.

[Example 2]

5, the curved display device 300 using the backlight unit including the curved curved back plate according to the second embodiment is configured in the same manner as the first embodiment, except that the light source 130 are not located on one side of the back plate 110 but on both sides.

The light source 130 of the second embodiment is provided on both sides of the surface where the light source 130 is bent on the back plate 110 and the light diffusion sheet 150 is provided on both sides of the back plate 110.

A display panel 200 having a concave curved surface is positioned on the front surface of the back plate 110 and a display panel 200 having a convex curved surface is disposed on the back surface of the back plate 110, The curved display device 300 of the double-sided type can be manufactured by providing light to the display panel 200 in which the light irradiated from the light source is positioned in front of each of the light sources.

The curved display device 300 of the double-sided type is configured to perform a game with respect to the display panel 200 in any one direction and to provide an advertisement through the display panel 200 positioned in the other direction It is possible to provide different images on both sides of the curved display device 300. FIG.

Therefore, the curved display device 300 according to the second embodiment can manufacture the curved display device 300 of the double-sided type sharing one backlight unit 100. [

[Example 3]

6 and 7, a curved display device 300 using a backlight unit including a curved curved back plate according to the third embodiment is similar to the curved display device 300 shown in Fig. (111). ≪ / RTI >

The backlight unit 100 including the curved curved back plate 110 according to the third embodiment has the light source 130 installed in the frame part 111 located on both sides of the back plate 110, The diffusion sheet 150 or the periphery of the light guide plate is positioned in the light source 130.

Here, when the light diffusion sheet 150 is provided, an optical pattern capable of diffusing light emitted from the light source 130 disposed around the light diffusion plate 150, such as a light guide plate, .

The light diffusing sheet 150 may be spaced apart from the light diffusing sheet 150 or the light guide plate by a spacing member 170. At this time, instead of the spacing member 170, a light diffusion sheet 150 or a light guide plate may be provided by forming a spacing fixing portion (not shown) so as to bend the back plate 110.

The light source 130 may be formed in a shape corresponding to the shape of the rim 111 when the back plate 110 is bent and may be attached to the rim 111, 110 are attached to the respective rim portions 111 formed on the surfaces of the back plate 110 so that the back plate 110 is curved in a curved shape.

At this time, the rim 111 may be formed at both sides where the back plate 110 is curved in a curved shape.

The display panel 200 is installed so as to be positioned in front of the light diffusion sheet 150 or the light guide plate as in the first embodiment.

The curved display device 300 using the backlight unit including the curved curved back plate according to the first embodiment configured as described above according to the third embodiment irradiates light around the light diffusion sheet 150 or the light guide plate The light diffusing sheet 150 or the light guide plate diffuses light and the light path is changed to illuminate the display panel 200 so that the spectator can view the image.

Therefore, the curved surface display device 300 can be manufactured by easily setting the installation position of the light source 130 on the curved display panel 200.

[Example 4]

8 and 9, the curved display device 300 using the backlight unit including the curved curved back plate according to the fourth embodiment is configured in the same manner as the third embodiment, A light source 130 is installed on both sides of the back plate 110.

The backlight unit 100 including the curved curved back plate 110 according to the fourth embodiment is configured such that the frame portion 111 is disposed on both sides of the back plate 110, And the light source 130 is provided on the rim portion 111 erected in each direction.

That is, the rim portion 111 is formed by bending the rim portion 111 so as to be raised toward the front and rear surfaces of the back plate 110 so that the rim portion 111 can irradiate the light from the light source 130 on both sides of the back plate 110 .

At this time, the rim portion 111 of the back plate 110 is bent in an alternate form, for example, one bent to the front surface of the back plate 110 and the other adjacent to the rear surface of the back plate 110 The light source 130 may be installed on the rim portion 111 which is bent and positioned on both sides of the back plate 110.

A light diffusing sheet 150 or a light guide plate for diffusing the light of the light source 130 installed at the rim portion 111 may be provided on both sides of the back plate 110, A concave curved surface display panel 200 and a convex curved surface display panel 200 may be installed so as to view an image.

The curved display device 300 using the backlight unit including the curved curved back plate according to the fourth embodiment configured as described above includes the curved display device 300 of the double-sided type sharing one backlight unit 100, Can be produced.

[Example 5]

10 and 11, a curved display device 300 using a backlight unit including a curved curved back plate according to the fifth embodiment is configured in the same manner as the third embodiment, The mounting position of the light source 130 can be changed.

The light source 130 is installed at the edge portions 113 located at both side ends of the back plate 110 rather than the edge portion 111 of the portion bent at the back plate 110 of the embodiment 3. [

That is, in the fifth embodiment, the light diffusion sheet 150 or the light guide plate does not have a curved surface, but a rim portion 113 corresponding to a straight line so as to irradiate light, and a light source 130 Respectively.

Here, when the light source 130 is installed on the straight-line side of the light diffusion sheet 150 or the light guide plate, the light emitted from the light source 130 has straightness, so that many light spots are generated in the bent central portion.

As a result, the central portion of the curved display device 300 becomes darker than the light source 130 on both sides.

In order to reinforce this, in Embodiment 5, a light source 130 may be provided not only on the straight edge 113 but also on the central portion of the back plate 110, so that the light amount can be reinforced.

The curved display device 300 using the backlight unit including the curved curved back plate according to the fifth embodiment of the present invention is configured such that the installation position of the light source 130 of the curved display device 300 is set to be The curved display device 300 can be manufactured.

[Example 6]

12 and 13, a curved display device 300 using a backlight unit including a curved curved back plate according to the sixth embodiment is configured in the same manner as the fifth embodiment, And the light source 130 may be provided on both sides of the back plate 110.

The backlight unit 100 including the curved curved back plate 110 according to the sixth embodiment includes the frame portion 113 of the back plate 110 not only on the front surface of the back plate 110 but also on the rear surface Respectively.

That is, the back plate 110 according to the sixth embodiment is different from the frame part 111 positioned on both sides of the portion where the back plate 110 is bent, The light source 130 is installed on each of the protruded rim portions 113 so that the rim portion 113 is formed to protrude not only from the front surface of the back plate 110 but also from the rear surface.

At this time, the rim 113 may be formed as a plurality of divided portions, and when one of the rim portions is alternately bent to the front, the adjacent one of the rim portions 113 may be bent to the rear side.

The light emitted from the light source 130 installed at the rim 113 protruding from the front and back surfaces of the back plate 110 is diffused and provided on the front and rear surfaces of the back plate 110, The light diffusion sheet 150 or the light guide plate may be provided.

At this time, the light source 130 may be additionally installed in the central portion and the central portion of the rear surface of the back plate 110, respectively, in order to compensate for the insufficient amount of light as in the fifth embodiment.

A display panel 200 having a concave curved surface shape for viewing an image in directions opposite to each other is provided outside the light diffusing sheet 150 or the light guide plate provided on the front and rear surfaces of the back plate 110, And a display panel 200 may be respectively installed.

The curved display device 300 using the backlight unit including the curved curved back plate according to the sixth embodiment configured as described above is configured to share one backlight unit 100 to form a curved display device 300 of double- Can be produced.

[Example 7]

14 and 15, a curved display device 300 using a backlight unit including a curved curved back plate according to the seventh embodiment includes the back plate 110 of the backlight unit 100, A light source mounting hole 115 was formed.

In the backlight unit 100 according to the seventh embodiment, a light source installation hole 115 is formed in the central part of the back plate 110 so as to be capable of irradiating light on both sides, The light sources 130 are installed so as to face each other on the inner circumference of the light sources.

Here, although the light sources 130 are provided on the upper and lower inner peripheries facing each other, it is needless to say that the light sources 130 may be installed on the left and right inner sides.

A light diffusion sheet 150 or a light guide plate is provided between the light sources 130 facing each other. At this time, different optical patterns may be formed on the light guide plate so that the light radiated from the upper, lower, left, and right sides of the light guide sheet 150 may irradiate light to both sides.

In the backlight unit 100 according to the seventh embodiment configured as described above, the light emitted from the light source 130 can simultaneously irradiate light to the front and rear surfaces of the back plate 110 through the light diffusion sheet 150 or the light guide plate .

The backlight unit 100 includes a display panel 200 curved in a concave curved surface and a display panel 200 curved in a convex curved shape are disposed on the front and rear surfaces of the backlight unit 100, Can be produced.

At this time, the back plate 110 is entirely covered with the back plate 110 so that the light diffused by the light diffusion sheet or the light guide plate installed in each light source installation hole 115 is diffused again to be uniform, ). ≪ / RTI >

Therefore, the curved display device 300 according to the seventh embodiment can easily set the position where the light source 130 is installed to facilitate the curved display device 300 having a double-sided shape sharing one backlight unit 100 Can be manufactured.

The backlight unit 100 including the folded backplate 110 according to the embodiment of the present invention as described above is manufactured by curving the backplate 110 to form a curved surface, It is not necessary to produce a mold for manufacturing the light source 130, and the installation position of the light source 130 can be easily set and designed, which can greatly reduce the manufacturing cost.

The backlight unit 100 can be manufactured by providing a light source on the surface of the back plate 110 and the edge parts 111 and 113 of the back plate 110 are additionally formed, It is possible to manufacture the backlight unit 100 of the edge type and to easily manufacture the backlight unit 100 which can use both the edge type and direct type.

Further, the curved display device 300 of the double-sided type sharing one backlight unit 100 can be easily manufactured.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes and modifications to the scope of the invention.

100: backlight unit 110: back plate
111, 113: rim portion 115: light source mounting hole
130: light source 150: light diffusion sheet
170: spacing member 200: display panel
300: display device
R1: angle of bend R2: angle of division
L: Bending width CL: inscribed circle
CO: circumscribed circle D: distance between inscribed circle and circumscribed circle

Claims (10)

A backlight unit of a curved display device for providing light to a curved display panel,
A light source for providing light to the display panel,
And a back plate that is curved in a plurality of planes to have a predetermined width along a circumferential direction of the display panel on a concentric circle having the same center as the curved center of the display panel,
The back plate is formed of a material having a reflective surface reflecting the light of the light source to perform the function of the reflector,
Wherein the back plate includes a rim reinforcing rigidity in a part of the periphery of the back plate or a whole periphery of the back plate, or a bend formed in a plate-like shape integrally with the back plate so that the light source is installed,
The edge portion is formed at each portion where the back plate is bent in a plane, and when the back plate is bent in a curved shape, the edge portions of both edges of the edge portion are narrowed toward the outside so that the edge portions do not overlap with each other Wherein the back plate comprises a curved curved back plate. The method according to claim 1,
And a light diffusion sheet fixed to the spacing fixing part and diffusing light emitted from the light source to provide the light to the display panel. 3. The method of claim 2,
The light diffusion sheet
Wherein the backlight unit includes an optical pattern to provide light in a direction in which the display panel is located in a light source disposed around the light diffusion sheet. 3. The method of claim 2,
The light diffusion sheet
Wherein the backlight unit is formed in a curved shape corresponding to the display panel. The method according to claim 1,
And a spacing member for spacing and fixing the light diffusion sheet for diffusing the light emitted from the light source. The method according to claim 1,
The back plate
And a spacing fixing part for partially bending the back plate to separate and fix the light diffusion sheet for diffusing the light emitted from the light source. The method according to claim 1,
The back plate
And a light source installation hole in which the light source is installed on a part or the entire periphery of the back plate through a part of the back plate so that the light source is irradiated on both sides of the back plate. Including backlight unit. 8. The method of claim 7,
And a light guide plate having optical patterns formed on both sides of the back plate so that light of the light source provided on the light source installation hole is irradiated to both sides of the back plate. The method according to claim 1,
The light source
Wherein the back plate is provided on both sides of the back plate. The backlight unit according to any one of claims 1 to 9,
The backlight unit according to claim 1, wherein the backlight unit includes a backlight unit, and the backlight unit includes a display panel curved in a curved shape, the backlight unit being disposed on one or both sides of the backlight unit.

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