KR20160147229A - Backlight unit and display apparatus including the same - Google Patents

Abstract

A display device comprises: a display panel configured to display an image by using light; and a backlight unit configured to generate the light and provide the light to the display panel. The backlight unit comprises: a plurality of light source units configured to generate the light; and a plurality of light source substrates in which the light source units are arranged wherein the light source substrates are arranged in a first direction. The light source substrates have a zigzag shape. The light source units are arranged in a predetermined region of bent portions of the zigzag shape.

Description

BACKLIT UNIT AND DISPLAY APPARATUS INCLUDING THE SAME [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a backlight unit and a display device including the same, and more particularly, to a backlight unit and a display device including the same.

Generally, a display device includes a display panel for displaying an image and a backlight unit for providing light to the display panel. The display panel includes a first substrate on which a plurality of pixels are arranged, a second substrate arranged to face the first substrate, and an image display layer disposed between the first and second substrates.

The image display layer is driven by the pixels and the transmittance of light is adjusted by the image display layer to display the image. The image display layer may be a liquid crystal layer, an electro-wetting layer, or an electrophoretic layer.

The backlight unit is divided into an edge type backlight unit disposed on a side surface of the display device to generate light and a direct type backlight unit disposed below the display panel to generate light. The direct-type backlight unit includes a plurality of light source units that generate light. The light source units may be a side emitting type light emitting diode that emits light to the side of the light source units.

Although the display device has been manufactured in a flat shape, a display device having a curved surface shape has been recently developed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a backlight unit capable of preventing occurrence of a dark portion and a display device including the same.

A display device according to an embodiment of the present invention includes a display panel that displays an image using light and a backlight unit that generates the light and provides the light to the display panel, wherein the backlight unit includes a plurality of And a plurality of light source substrates arranged in a first direction in which the light source units are arranged, the light source substrates having a zigzag shape, and the light source units are arranged in a predetermined region of the bending portions of the jig- .

Wherein each of the light source substrates comprises a plurality of first extending portions arranged in a second direction intersecting with the first direction and a plurality of second extending portions arranged in the second direction and arranged between the first extending portions Wherein the first extensions extend in a first diagonal direction intersecting the first and second directions on a plane parallel to the first and second directions, And each of the second extensions extends in a first diagonal direction intersecting with the first and second directions and the first diagonal direction, One end of the (k + 1) -th first extension is connected, and k is a natural number.

Th one of the k-th first extensions and the k + 1-th first extension is connected to the one end of the k-th first extension and the k + 1-th extension of the k + 1 < th > first extension portion.

The light source units are disposed in predetermined areas of the connecting portions of the first and second extensions defined by the bent portions.

The first and second extensions adjacent to each other form a first angle.

The first angle is set at an angle of 45 to 135 degrees.

The first and second extensions adjacent to each other are arranged to be symmetrical to each other.

The width of each of the light source substrates in the first direction has a first width and the light source substrates are equally spaced apart with a second width larger than the first width in the first direction.

The backlight unit and the display panel are bent in the first direction and have a shape parallel to a second direction intersecting the first direction.

The display device may further include a first protection member that receives the backlight unit, wherein the first protection member includes a plurality of grooves having the jig jig shape, and the light source substrates are inserted and disposed in the grooves.

The backlight unit may include a reflective sheet including a plurality of holes into which the light source units are inserted, a diffusion plate disposed on the light source units to diffuse the light provided from the light source units, And an optical sheet for diffusing and condensing the light provided from the diffusion plate, wherein the display panel is disposed on the optical sheet.

Each of the light source units includes a side-emitting type light emitting diode.

The bent portions have a curved shape.

A backlight unit according to an embodiment of the present invention includes a plurality of light source units for generating light and a plurality of light source substrates arranged in a first direction in which the light source units are arranged, A plurality of first extensions arranged in a second direction intersecting the first direction and a plurality of second extensions arranged in the second direction and disposed between the first extensions, Extending in a first diagonal direction intersecting the first and second directions on a plane parallel to the first and second directions and the second extensions extending in a first diagonal direction intersecting the first and second directions And each of the second extending portions is connected to the other end of the k-th first extending portion and the (k + 1) -th first extending portion, which are opposite ends of one end of the k-th first extending portion, Once opened The.

A display device according to an embodiment of the present invention includes a display panel that displays an image using light and a backlight unit that generates the light and provides the light to the display panel, wherein the backlight unit includes a plurality of And a plurality of light source substrates arranged in a first direction in which the light source units are disposed, wherein each of the light source substrates includes a plurality of light source substrates alternately arranged in a second direction intersecting the first direction, 1 sub-extensions, a plurality of second sub-extensions, and a plurality of second extensions and a plurality of third extensions extending in the second direction and arranged in the second direction, the first sub- And the second sub-extensions extend at a third angle subtracting the second angle from the second direction at 180 degrees, and the second sub- The second extension of the angle connects one end of the hth first sub-extension to one end of the hth second sub-extension, and each third extension is connected to one end of the hth second sub- Th first sub-extension and the other end of the (h + 1) -th first sub-extension that is the opposite end of one end of the (h + 1) -th first sub-extension, and the light source units are connected to the first and second sub- And the connecting portions of the second and third extension portions.

The display device according to the embodiment of the present invention can further reduce the light blocked by the adjacent light source units by further separating the intervals between the light source units to thereby prevent occurrence of dark portions that may occur between adjacent light source units have.

1 is an exploded perspective view of a display device according to an embodiment of the present invention.
FIG. 2 is a diagram showing the configuration of a pixel among the pixels arranged in the display panel shown in FIG. 1. FIG.
3 is a cross-sectional view taken along the line I-I 'shown in FIG.
FIG. 4 is an enlarged view of two adjacent light sources of the light sources shown in FIG. 1. FIG.
5 is a diagram showing a planar configuration of a comparative light source.
6 is a view illustrating an example of light emitted from two comparative light source units adjacent to each other among the comparison light source units shown in FIG.
FIG. 7 is a view illustrating an example of light emitted from two adjacent light source units among light source units disposed on any one of the light source substrates shown in FIG.
8 to 11 are views showing the configuration of light sources of display devices according to various embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. To fully disclose the scope of the invention to a person skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

It is to be understood that when an element or layer is referred to as being "on" or " on "of another element or layer, All included. On the other hand, a device being referred to as "directly on" or "directly above" indicates that no other device or layer is interposed in between. "And / or" include each and every combination of one or more of the mentioned items.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" May be used to readily describe a device or a relationship of components to other devices or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation. Like reference numerals refer to like elements throughout the specification.

Although the first, second, etc. are used to describe various elements, components and / or sections, it is needless to say that these elements, components and / or sections are not limited by these terms. These terms are only used to distinguish one element, element or section from another element, element or section. Therefore, it goes without saying that the first element, the first element or the first section mentioned below may be the second element, the second element or the second section within the technical spirit of the present invention.

Embodiments described herein will be described with reference to plan views and cross-sectional views, which are ideal schematics of the present invention. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are generated according to the manufacturing process. Thus, the regions illustrated in the figures have schematic attributes, and the shapes of the regions illustrated in the figures are intended to illustrate specific types of regions of the elements and are not intended to limit the scope of the invention.

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

1 is an exploded perspective view of a display device according to an embodiment of the present invention.

1, a display device 500 according to an exemplary embodiment of the present invention has a long side in a first direction DR1 and a short side in a second direction DR2 that intersects a first direction DR1. have. The display device 500 may be a curved display device. For example, the display device 500 may have a shape bent in the first direction DR1 and parallel to the second direction DR2.

The display device 500 includes a display panel 100 for displaying an image using light, a backlight unit (BLU) for generating light to provide the display panel 100, and a display panel 100 and a backlight unit (BLU) (10, 20, 30) for receiving and protecting the light emitting diode.

The display panel 100, the backlight unit BLU and the protective members 10, 20 and 30 may have a long side in the first direction DR1 and a short side in the second direction DR2. The display panel 100, the backlight unit BLU and the protective members 10, 20 and 30 may have a shape bent in the first direction DR1 and parallel to the second direction DR2.

Although not shown in FIG. 1, the display panel 100 includes a plurality of pixels that display an image using light. Each pixel may represent one of the primary colors. The primary colors may include red, green, and blue colors. However, the present invention is not limited to this, and the main color may further include various colors such as white, yellow, cyan, and magenta.

The display panel 100 may be a liquid crystal display panel including a liquid crystal layer. For example, the display panel 100 includes a first substrate 110 on which a plurality of pixels are arranged, a second substrate 120 facing the first substrate 110, And a liquid crystal layer (not shown) disposed between the pixel electrodes 120.

However, the present invention is not limited thereto. The display panel 100 may be an electrophoretic display panel including an electrophoretic layer or an electrowetting display panel including an electro-wetting layer.

The area on the plane of the display panel 100 includes a display area DA and a non-display area NDA disposed in a predetermined area of the boundary of the display panel 100 so as to surround the display area DA. The pixels are arranged in the display area DA, and a driver (not shown) for driving the pixels can be arranged in the non-display area NDA. The display area DA is an area for displaying an image, and the non-display area NDA does not display an image.

The backlight unit BLU may be disposed behind the display panel 100 to provide light to the display panel 100. The backlight unit (BLU) may be a direct-type backlight unit.

The backlight unit BLU includes an optical sheet 200, a diffuser plate 300, a reflective sheet 400, and a plurality of light sources LS. The optical sheet 200, the diffuser plate 300 and the reflective sheet 400 have a long side in the first direction DR1 and a short side in the second direction DR2. The diffusion plate 300 having rigidity may be bent in the first direction DR1 and may have a shape parallel to the second direction DR2.

The optical sheet 200 is disposed on the top of the diffuser plate 300 and the reflective sheet 400 is disposed on the bottom of the diffuser plate 300. The display panel 100 is disposed on the upper portion of the optical sheet 200 and the light sources LS are disposed on the lower portion of the diffuser plate 300.

The light sources LS have a jig jig shape and are arranged in a first direction DR1. The light sources LS generate light and provide the light to the diffuser plate 300. The light generated in the light sources LS may be white light.

The diffuser plate 300 may include a diffuser (not shown) distributed within the diffuser plate 300 or may include a diffuser layer (not shown) coated on the surface of the diffuser plate 300 have. The diffusion plate 300 diffuses the light provided from the light sources LS and provides the light to the optical sheet 200.

The optical sheet 200 can condense the light provided from the diffusion plate 300 in the upward direction in which the display panel 100 is disposed. Although not shown, the optical sheet 200 may include a diffusion sheet, a prism sheet disposed on the diffusion sheet, and a protective sheet disposed on the prism sheet to protect the prism sheet from scratches.

The diffusion sheet may serve to diffuse the light provided from the diffusion plate 300. The prism sheet can function to condense the light diffused in the diffusion sheet in the upward direction perpendicular to the plane of the display panel 100. [

The light passing through the prism sheet can be directed to the upper direction and can be provided to the display panel 100 with a uniform luminance distribution. The display panel 100 can display an image using the light provided from the optical sheet 200. [

The reflective sheet 400 disposed under the diffusion plate 300 includes a plurality of holes H. [ The light sources LS include a plurality of light source units LSU for generating light and a light source substrate SUB on which the light source units LSU are mounted. The holes H of the reflective sheet 400 are arranged to correspond to the light source units LSU.

The light source units LSU are inserted into the holes H and the reflective sheet 400 may reflect the light incident on the light source units LSU laterally and provide the light to the diffuser plate 300 . The configuration in which the light source units LSU are inserted into the holes H will be described in detail below with reference to Fig.

The light source substrates SUB are arranged in a first direction DR1 and have a jig jig shape. The light source units LSU are disposed in predetermined areas of the zigzag bent portions of the light source substrates SUB. The light source units LSU may each include a light emitting diode. The light emitting diode may be a side emitting type light emitting diode.

The light source units LSU may have a cylindrical shape. However, the present invention is not limited to this, and the light source units LSU may have a rectangular parallelepiped shape. Light generated in the light source units (LSU) is provided to the diffusion plate (300).

The protective members 10, 20, and 30 include a first protective member 10, a second protective member 20, and a third protective member 30. The first protection member 10 is defined as a bottom chassis and the second protection member 20 is defined as a middle frame and the third protection member 30 is defined as a top chassis. . ≪ / RTI >

The first protection member 10 includes a bottom portion 11, two inclined portions 12, two connection portions 13, two first side wall portions 14, and two second side wall portions 15, . The bottom portion 11 has a long side in the first direction DR1 and a short side in the second direction DR2. The bottom portion 11 may have a shape bent in the first direction DR1 and parallel to the second direction DR2.

The bottom portion 11 includes a plurality of grooves G formed by being recessed downward from the upper surface of the bottom portion 11. [ The grooves G are arranged so as to correspond to the light source substrates SUB having the same jig jag shape as the light source substrates SUB. The light source substrates SUB of the light sources LS are inserted in the grooves G and disposed.

The inclined portions 12 are connected to both sides of the bottom portion 11 in the first direction DR1. The inclined portions 12 have inclined surfaces which are inclined at an angle with the bottom portion 11 and which are bent upward. The inclined portions 12 extend outwardly from the short side of the bottom portion 11 with a predetermined angle with respect to the upper direction.

The connecting portions 13 are connected to the other ends of the inclined portions 12 which are opposite ends of one ends of the inclined portions 12 connected to both sides of the bottom portions 11 in the first direction DR1. The connection portions 13 may have a flat shape.

The first sidewall portions 14 are connected to the other ends of the connecting portions 13 which are opposite ends of the ends of the connecting portions 13 connected to the other ends of the inclined portions 12 in the first direction DR1. The first side wall portions 14 may extend upward.

The second sidewall portions 15 are formed on both sides of the bottom portion 11 on both sides of the inclined portions 12, both sides of the connecting portions 13 and both sides of the first sidewall portions 14 in the second direction DR2 And extends in the first direction DR1. The second sidewall portions 15 may be disposed perpendicular to a plane parallel to the first direction DR1 and the second direction DR2.

The second protective member 20 is disposed between the display panel 100 and the backlight unit BLU. The second protection member 20 may have a rectangular frame shape. The second protection member 20 is disposed to correspond to the non-display area NDA of the display panel 100. [ The second protection member 20 includes a first opening OP1.

The third protective member 30 is disposed on the upper portion of the display panel 100. [ The third protection member 30 may have a rectangular frame shape. The third protective member 30 includes a second opening OP2 exposing the display area DA of the display panel 100. [ The second opening OP2 may be arranged to overlap the first opening OP1 and be smaller than the first opening OP1.

The configuration in which the display panel 100 and the backlight unit BLU are accommodated in the protection members 10, 20, and 30 will be described in detail below with reference to FIG.

FIG. 2 is a diagram showing the configuration of a pixel among the pixels arranged in the display panel shown in FIG. 1. FIG.

Although only one pixel is shown as an example in Fig. 2, substantially the other pixels have the same configuration as the pixel shown in Fig.

Referring to FIG. 2, the display panel 100 includes a first substrate 110, a second substrate 120 facing the first substrate 110, and a second substrate 120 facing the first substrate 110 and the second substrate 120 And a liquid crystal layer LC disposed in the liquid crystal layer LC.

The pixel includes a transistor TR connected to the gate line GLi and the data line DLj, a liquid crystal capacitor Clc connected to the transistor TR and a storage capacitor Cst connected in parallel to the liquid crystal capacitor Clc . The storage capacitor Cst may be omitted. The gate line GLi extends in the first direction DR1 and the data line DLj extends in the second direction DR2. i and j are natural numbers.

The gate line GLi, the data line DLj, and the transistor TR may be disposed on the first substrate 110. [ The transistor TR includes a gate electrode connected to the gate line GLi, a source electrode connected to the data line DLj, and a drain electrode connected to the liquid crystal capacitor Clc and the storage capacitor Cst.

The liquid crystal capacitor Clc includes a pixel electrode PE disposed on the first substrate 110, a common electrode CE disposed on the second substrate 120 to face the pixel electrode PE, And a liquid crystal layer LC disposed between the common electrode CE and the common electrode CE. The liquid crystal layer LC serves as a dielectric. The pixel electrode PE is connected to the drain electrode of the transistor TR.

2, the pixel electrode PE may have a slit structure including a plurality of branches extended radially from the cruciform stem portion and the stem portion, have.

The common electrode CE may be formed entirely on the second substrate 120. However, the present invention is not limited thereto, and the common electrode CE may be disposed on the first substrate 110. In this case, at least one of the pixel electrode PE and the common electrode CE may have a slit structure.

The storage capacitor Cst may include a storage electrode (not shown) branched from the pixel electrode PE, a storage line (not shown), and an insulating layer disposed between the pixel electrode PE and the storage electrode . The storage lines are disposed on the first substrate 110 and may be formed on the same layer as the gate lines GLi. The storage electrode may partially overlap the pixel electrode PE.

The pixel may further include a color filter (CF) representing one of red, green, and blue. As an exemplary embodiment, the color filter CF may be disposed on the second substrate 120, as shown in Fig. However, the present invention is not limited thereto, and the color filter CF may be disposed on the first substrate 110.

The transistor TR is turned on in response to the gate signal provided through the gate line GLi. The data voltage received via the data line DLj is supplied to the pixel electrode PE of the liquid crystal capacitor Clc through the turned-on transistor TR. A common voltage is applied to the common electrode CE.

An electric field is formed between the pixel electrode PE and the common electrode CE by the difference in the voltage level of the data voltage and the common voltage. The liquid crystal molecules of the liquid crystal layer LC are driven by an electric field formed between the pixel electrode PE and the common electrode CE. The light transmittance is adjusted by the liquid crystal molecules driven by the electric field, and the image can be displayed.

A storage voltage having a constant voltage level may be applied to the storage line. However, the present invention is not limited to this, and the storage line can receive a common voltage. The storage capacitor Cst serves to complement the voltage charged in the liquid crystal capacitor Clc.

3 is a cross-sectional view taken along the line I-I 'shown in FIG.

Referring to Fig. 3, a reflective sheet is disposed on the bottom portion 11 and the inclined portion 12 of the first protective member 10. The reflective sheet 400 is disposed on the bottom portion 11 and the inclined portion 12 except for the region where the grooves G are arranged.

The light source substrates SUB are inserted into the grooves G and disposed in the grooves G and the light source units LSU are inserted into the holes H of the reflection sheet 400. [ The thickness of the reflective sheet 400 in the vertical direction is smaller than the thickness of the light source units LSU. Light emitted to the rear side of the light source units (LSU) may be reflected by the reflection sheet 400 and provided to the diffusion plate 300.

A diffuser plate (300) disposed on the reflective sheet (400) is disposed on the connection portion (13). A predetermined region on both sides of the diffusion plate 300 is disposed on the connection portion 13. [ Therefore, a predetermined space may be formed between the diffusion plate 300 and the bottom portion 11, and between the diffusion plate 300 and the slope portion 12.

The optical sheet 200 is disposed on the diffuser plate 300. Unlike the diffusion plate 300 having rigidity, the optical sheet 200 has a very thin and warped property. The optical sheet 200 disposed on the diffuser plate 300 may have a curved shape like the diffuser plate 300.

The side surfaces of the diffusion plate 300 and the optical sheet 200 in the first direction DR1 may be disposed adjacent to the inner side surface of the first side wall portion 14. [ Although not shown, the side surfaces of the diffusion plate 300 and the optical sheet 200 in the second direction DR2 may be disposed adjacent to the inner side surface of the second side wall portion 15. Therefore, the backlight unit BLU can be received in the first protective member 10. [

The second protection member 20 is arranged to cover a predetermined region of the boundary of the optical sheet 200 of the backlight unit BLU and the first sidewall portions 14 of the first protection member 10. [ Although not shown in section, the second protection member 20 may be disposed to cover a predetermined region of the upper portion of the second sidewall portions 15 of the first protection member 10.

The second protective member 20 supports the non-display area NDA of the display panel 100. [ A predetermined area of the non-display area NDA adjacent to the boundary of the display panel 100 is disposed in a predetermined area on the second protection member 20 adjacent to the first opening OP1. The second protection member 20 includes a third side wall portion 21 extending downward and covering an outer side surface of the first side wall portions 14 and an outer side surface of a predetermined region of the upper side of the second side wall portions 15 .

The third protection member 30 is disposed so as to cover the non-display area NDA of the display panel 100 and the second protection member 20 where the display panel 100 is not disposed. The display area DA of the display panel 100 is exposed by the second opening OP2 of the third protection member 30. [ The second opening OP2 may be smaller than the first opening OP1. The third protective member 30 includes a fourth side wall portion 31 extending downward and disposed on the outer side surface of the third side wall portion 21 of the second protective member 20.

FIG. 4 is an enlarged view of two adjacent light sources of the light sources shown in FIG. 1. FIG. 5 is a diagram showing a planar configuration of a comparative light source.

4, each of the light source substrates SUB having a jig jig shape includes a plurality of first extending portions EX1 arranged in a second direction DR2 with a predetermined gap therebetween, And a plurality of second extensions EX2 arranged in the direction DR2 and disposed between the first extensions EX1. The first extensions EX1 may be arranged at equal intervals in the second direction DR2 and the second extensions EX2 may be arranged at even intervals in the second direction DR2.

The first extensions EX1 extend in the first diagonal direction DDR1 intersecting the first direction DR1 and the second direction DR2 on a plane parallel to the first direction DR1 and the second direction DR2 . The second extensions EX2 are arranged to intersect the first direction DR1, the second direction DR2 and the first diagonal direction DDR1 on a plane parallel to the first direction DR1 and the second direction DR2. The second diagonal direction DDR2. The first diagonal direction DDR1 and the second diagonal direction DDR2 may extend at an angle of 45 degrees to 135 degrees.

Each second extension portion EX2 is connected to the other end E2 of the k-th first extension portion EX1 and the k-th first extension portion EX2, which are opposite ends of the one end E1 of the k-th first extension portion EX1, And connects one end E3 of the second switch EX1. The other end E2 of the k-th first extension part EX1 and the one end E3 of the k + 1-th first extension part EX1 are connected to one ends E1 and k + 1 of the k-th first extension part EX1, Th first extended portion EX1 which is the opposite end of the one end E3 of the first extended portion EX1. k is a natural number.

The portions where the first extensions EX1 and the second extensions EX2 are connected are defined as the above-mentioned bent portions, and the light source units LSU are disposed in predetermined regions of the bent portions as described above.

The first and second extensions (EX1, EX2) adjacent to each other are arranged to be symmetrical to each other. The first angle? 1 formed by the first and second extensions EX1 and EX2 adjacent to each other is set to 45 to 135 degrees, which is equal to the angle formed by the first diagonal direction DDR1 and the second diagonal direction DDR2 .

The width of each light source substrate SUB in the first direction DR1 is set to the first width W1. The light source substrates SUB are equally spaced apart from each other with a second width W2 larger than the first width W1 in the first direction DR1.

Referring to FIG. 5, the comparative light source LS 'includes a comparative light source substrate SUB' extending in the second direction DR2 and a plurality of comparative light source units LSU 'mounted on the comparative light source substrate SUB' ). The comparative light source units LSU 'disposed on the comparative substrate SUB' are arranged at even intervals in the second direction DR2. The comparative light source units LSU 'may be side-emitting type light emitting diodes.

In an embodiment of the present invention, the light source units (LSU) are disposed in the zigzag bent portions of the light source substrates (SUB). Therefore, the interval between the light source units LSU disposed on the same light source substrate SUB is larger than that of the comparative light source units LSU 'disposed on the comparative light source substrate SUB' extending in the second direction DR2. .

6 is a view illustrating an example of light emitted from two comparative light source units adjacent to each other among the comparison light source units shown in FIG. FIG. 7 is a view illustrating an example of light emitted from two adjacent light source units among light source units disposed on any one of the light source substrates shown in FIG.

Referring to FIG. 6, the first light L1 of the first and second lights L1 and L2 emitted through the side surface of the comparison light source units LSU 'may be provided to the diffusing plate, (L2) may be blocked by the comparative light source units (LSU ') adjacent to each other and not provided to the diffusion plate. In this case, the brightness of a predetermined region between the comparative light source units LSU 'disposed on the comparative light source substrate SUB' and adjacent to each other is lower than that of the peripheral region, and can be visually recognized as the dark region.

As the distance between the adjacent comparative light source units LSU 'disposed on the comparative light source substrate SUB' is closer to each other, the amount of light blocked by the adjacent comparative light source units LSU 'can be further increased, The area can be viewed larger.

Referring to FIG. 7, the spacing between the adjacent light source units LSU disposed on the same light source substrate SUB is substantially the same as that between the adjacent comparative light source units LSU 'disposed on the comparative light source substrate SUB' .

In this case, the first and second lights L1 and L2 emitted through the side surfaces of the light source units LSU may be provided to the diffusion plate 300 without being blocked by the adjacent light source units LSU. As a result, a predetermined area between the light source units LSU disposed on the same light source substrate SUB and adjacent to each other may not be recognized as an arm portion.

As a result, the backlight unit (BLU) and the display device 500 according to the embodiment of the present invention further separate the light source units (LSU) disposed on the same light source substrate (SUB) It is possible to prevent the occurrence of dark portions that may occur between the adjacent light source units LSU.

8 to 11 are views showing the configuration of light sources of display devices according to various embodiments of the present invention.

The light sources LS_1 and LS_2 shown in FIGS. 8 to 11 and the light sources LSU shown in FIG. 1 will be referred to as the light sources LSU shown in FIG. The configuration of the light sources LS_1 and LS_2 shown in FIGS. 8 to 11 will be described.

8 to 11 illustrate one light source as an example. In practice, a plurality of light sources shown in Figs. 8 to 11 are prepared, respectively, and can be used in the display devices of various embodiments.

Referring to FIG. 8, the configuration of the light source LS_1 substantially has the same shape as the light sources LS shown in FIG. 1 except for the shape of the bent portions of the light source substrate SUB_1. For example, the light source LS_1 includes a plurality of first extensions EX1_1 and a second diagonal direction DR2, which extend in the first diagonal direction DDR1 and are arranged at regular intervals in the second direction DR2, And a plurality of second extensions EX2_1 extending in the second direction DR2 and evenly spaced from each other.

The connection configuration of the first extensions EX1_1 and the second extensions EX2_1 is substantially the same as the connection configuration of the first extensions EX1 and the second extensions EX2 described in FIG.

Unlike the light sources LS shown in FIG. 1, the bent portions defined as the portions where the first extensions EX1_1 and the second extensions EX2_1 of the light source LS_1 are connected to each other have curved shapes. The light source units (LSU) are disposed in predetermined areas of curved portions having a curved shape.

With this configuration, since the intervals between the light source units LSU_1 disposed on the light source substrate SUB_1 can be further spaced, the occurrence of dark portions that may occur between the adjacent light source units LSU_1 can be prevented .

9 to 11, the light source substrate SUB_2 on which the light source units LSU_2 are disposed includes a plurality of first sub-extensions EX1_2, a plurality of second sub-extensions EX1_3, a plurality of second sub- Extensions EX2_2, and a plurality of third extensions EX3.

The first sub-extensions EX1_2 and the second sub-extensions EX1_3 are alternately arranged in the second direction DR2. The second extensions EX2_2 extend in the second direction DR2 and are arranged in the second direction DR2. The third extensions EX3 extend in the second direction DR2 and are arranged in the second direction DR2.

The first sub extension portions EX1_2 extend at a second angle? 2 with respect to the second direction DR2. And an angle obtained by subtracting the second angle [theta] 2 at 180 degrees is defined as a third angle [theta] 3. The second sub-extensions EX1_3 extend at a third angle 3 with the second direction DR2. The second angle [theta] 2 may be set to an angle greater than or equal to 30 degrees and less than or equal to 150 degrees.

For example, as shown in Fig. 9, the second angle? 2 may be set to 90 degrees. In this case, the first sub-extensions EX1_2 and the second sub-extensions EX1_3 extend in the first direction DR1.

As shown in FIG. 10, the second angle? 2 may be less than 90 degrees, more preferably, less than 90 degrees and greater than or equal to 30 degrees. As shown in FIG. 11, the second angle? 2 may be greater than 90 degrees, and more preferably, may be set to an angle greater than 90 degrees and less than or equal to 150 degrees.

Each second extended portion EX2_2 connects one end of the hth first sub-extended portion EX1_2 and one end of the hth second sub-extended portion EX1_3. Each third extension portion EX3 is connected to the other end of the hth second sub-extension portion EX1_3 which is the opposite end of one end of the hth second sub-extension portion EX1_3 and the other end portion of the h + 1th first sub-extension portion EX1_2 (H + 1) -th first sub-extension EX1_2, which is the opposite end of the first sub-extension EX1_2. h is a natural number.

The connection portions of the first sub extension portions EX1_2 and the second extension portions EX2_2, the connection portions of the second sub extension portions EX1_3 and the second extension portions EX2_2, the first sub extension portions EX1_2, And the connecting portions of the second sub-extensions EX1_3 and the third extensions EX3 are defined as bending portions. The light source units LSU_2 may be disposed in a predetermined area of the bent portions to be spaced apart from each other.

The intervals between the light source units LSU_2 disposed on the light source substrate SUB_2 can be further spaced apart from each other so that occurrence of dark portions that may occur between adjacent light source units LSU_2 can be prevented.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible. In addition, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, and all technical ideas which fall within the scope of the following claims and equivalents thereof should be interpreted as being included in the scope of the present invention .

100: display panel 200: optical sheet
300: diffusion plate 400: reflective sheet
500: display device 110, 120: first and second substrates
10, 20, 30: first, second, and third protective members
BLU: Backlight unit LS, LS_1, LS_2: Light source
SUB, SUB_1, SUB_2: Light source substrate LSU, LSU_1, LSU_2: Light source unit
EX1, EX1_1: First extension parts EX2, EX2_1, EX2_2:
EX3: third extension part EX1_2, EX1_3: first and second sub-

Claims (25)

A display panel for displaying an image using light; And
And a backlight unit for generating the light and providing the light to the display panel,
The backlight unit includes:
A plurality of light source units for generating the light; And
A plurality of light source substrates arranged in a first direction in which the light source units are arranged,
Wherein the light source substrates have a zigzag shape, and the light source units are arranged in predetermined areas of the bent portions of the jig jig. The method according to claim 1,
Wherein each of the light source substrates comprises:
A plurality of first extensions arranged in a second direction intersecting the first direction; And
And a plurality of second extensions arranged in the second direction and disposed between the first extensions,
Wherein the first extensions extend in a first diagonal direction intersecting the first and second directions on a plane parallel to the first and second directions and the second extensions extend in a first diagonal direction intersecting the first and second directions on a plane parallel to the first and second directions, And extending in a second diagonal direction intersecting the second diagonal direction and the second directions,
And each of the second extending portions connects the other end of the k-th first extending portion, which is the opposite end of one end of the k-th first extending portion, and one end of the (k + 1) -th first extending portion, and k is a natural number. 3. The method of claim 2,
Th one of the k-th first extensions and the k + 1-th first extension is connected to the one end of the k-th first extension and the k + 1-th extension of the k + 1 < th > first extension portion. 3. The method of claim 2,
Wherein the light source units are disposed in predetermined areas of connection portions of the first extensions and the second extensions defined by the bent portions. 3. The method of claim 2,
And the first and second extensions adjacent to each other form a first angle. 6. The method of claim 5,
Wherein the first angle is set at an angle of 45 degrees to 135 degrees. 6. The method of claim 5,
Wherein the first and second extending portions adjacent to each other are arranged to be symmetrical to each other. 3. The method of claim 2,
Wherein the width of each of the light source substrates in the first direction has a first width and the light source substrates are equally spaced apart from each other with a second width larger than the first width in the first direction. The method according to claim 1,
Wherein the backlight unit and the display panel have a shape bent in the first direction and parallel to a second direction intersecting the first direction. The method according to claim 1,
Further comprising: a first protective member that receives the backlight unit. 11. The method of claim 10,
Wherein the first protection member includes a plurality of grooves having the jig jig shape, and the light source substrates are inserted in the grooves. The method according to claim 1,
The backlight unit includes:
A reflective sheet including a plurality of holes into which the light source units are inserted;
A diffusion plate disposed on the light source units and diffusing light provided from the light source units; And
Further comprising an optical sheet disposed on the diffusing plate and diffusing and condensing the light provided from the diffusing plate,
And the display panel is disposed on the optical sheet. The method according to claim 1,
Wherein each of the light source units includes a side-emitting type light emitting diode. The method according to claim 1,
Wherein the bent portions have a curved shape. A plurality of light source units for generating light; And
A plurality of light source substrates arranged in a first direction in which the light source units are arranged,
Wherein each of the light source substrates comprises:
A plurality of first extensions arranged in a second direction intersecting the first direction; And
And a plurality of second extensions arranged in the second direction and disposed between the first extensions,
Wherein the first extensions extend in a first diagonal direction intersecting the first and second directions on a plane parallel to the first and second directions and the second extensions extend in a first diagonal direction intersecting the first and second directions on a plane parallel to the first and second directions, And extending in a second diagonal direction intersecting the second diagonal direction and the second directions,
And each of the second extending portions connects the other end of the k-th first extending portion, which is the opposite end of the k-th first extending portion, to one end of the (k + 1) -th first extending portion. 16. The method of claim 15,
Th one of the k-th first extensions and the k + 1-th first extension is connected to the one end of the k-th first extension and the k + 1-th extension of the k + 1 < th > first extension. 16. The method of claim 15,
Wherein the light source units are disposed in predetermined areas of connection portions of the first extensions and the second extensions defined by the bent portions. 16. The method of claim 15,
Wherein the first and second extensions adjacent to each other form an angle of 45 to 135 degrees and the first and second extensions adjacent to each other are disposed to be symmetrical to each other. 16. The method of claim 15,
Wherein each of the light source substrates has a first width in the first direction and the light source substrates are equally spaced apart from each other with a second width larger than the first width in the first direction. 16. The method of claim 15,
Wherein each of the light source units includes a side-emitting type light emitting diode. A display panel for displaying an image using light; And
And a backlight unit for generating the light and providing the light to the display panel,
The backlight unit includes:
A plurality of light source units for generating the light; And
A plurality of light source substrates arranged in a first direction in which the light source units are arranged,
Wherein each of the light source substrates comprises:
A plurality of first sub-extensions and a plurality of second sub-extensions alternately arranged in a second direction intersecting the first direction; And
A plurality of second extensions and a plurality of third extensions extending in the second direction and arranged in the second direction,
Wherein the first sub-extensions extend at a second angle with the second direction and the second sub-extensions extend at a third angle subtracting the second angle from the second direction at 180 degrees,
And each of the second extending portions connects one end of the h th first sub-extended portion and one end of the h th second sub-extending portion, and each of the third extending portions connects the one end of the h th second sub- th one of the (h + 1) -th first sub-extension and the other end of the (h + 1) -th first sub-extension that is the opposite end of the h +
Wherein the light source units are disposed in predetermined areas of the connecting portions of the first and second sub-extensions and the second and third extensions. 22. The method of claim 21,
Wherein the second angle is set to an angle greater than 30 degrees and less than 150 degrees. 22. The method of claim 21,
And the second angle is set to 90 degrees. 22. The method of claim 21,
Wherein the second angle is set to an angle smaller than 90 degrees and greater than or equal to 30 degrees. 22. The method of claim 21,
Wherein the second angle is set to an angle greater than 90 degrees and less than or equal to 150 degrees.

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