KR20150070736A - Light guide panel, backlight unit and liquid crystal display comprising the same - Google Patents

Abstract

Provided are a light guide panel, a backlight unit, and a liquid crystal display. According to an embodiment of the present invention, the light guide panel comprises: an upper surface; a lower surface which is arranged in opposite to the upper surface; a first side surface and a second side surface which are arranged opposite to each other between the upper surface and the lower surface, wherein the lower surface comprises a reference surface and a plurality of scattering patterns which are protruded or indented from the reference surface and the scattering patterns comprise a first tilted surface which makes a first angle with the reference surface and a second tilted surface of which an end adjoins the first tilted surface and makes a second angle with the reference surface.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a light guide plate, a backlight unit, and a liquid crystal display device including the same. BACKGROUND OF THE INVENTION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate, a backlight unit and a liquid crystal display including the same, and more particularly, to a light guide plate, a backlight unit and a liquid crystal display including the same.

The liquid crystal display device includes a liquid crystal display module connected to the outer case. The liquid crystal display module includes a liquid crystal panel composed of two substrates interposing a liquid crystal layer, and a backlight unit positioned behind the liquid crystal panel and supplying light to the liquid crystal layer. The liquid crystal panel displays an image by adjusting the transmittance of light provided by the backlight unit.

The backlight unit is divided into two types according to the position of the light source: direct type and light type. In the direct type system, a light source is provided behind the display panel. In the photometric system, a light source is provided at a rear side of the display panel.

In the case of the metering type backlight unit, a light guide plate for guiding the light emitted from the light source to the display panel side is required. The light guide plate changes the light path to guide the light to the display panel. In such a liquid crystal display device, it is an important issue to condense light emitted in various directions and direct it toward the front, that is, the display panel, and accordingly, various technical attempts have been made to improve the front exit light luminance .

A problem to be solved by the present invention is to provide a light guide plate having excellent front exit light luminance.

Another object of the present invention is to provide a backlight unit having excellent front emission luminance.

Another problem to be solved by the present invention is to provide a liquid crystal display device having excellent front emission luminance.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of manufacturing the same.

According to an aspect of the present invention, there is provided a light guide plate including: an upper surface including a first side extending in the x-axis direction and a second side extending in the y-axis direction; a lower surface opposed to the upper surface, And a first side and a second side disposed opposite to each other between the reference plane and the reference plane, wherein the lower plane includes a plurality of scattering patterns formed by protruding or sinking from the reference plane and the reference plane, And a second inclined surface having one end in contact with the first inclined surface and a second angle with the reference surface.

According to an aspect of the present invention, there is provided a backlight unit including: an upper surface including a first side extending in the x-axis direction and a second side extending in the y-axis direction; a lower surface opposed to the upper surface; Wherein the scattering pattern includes a first side and a second side disposed opposite to each other between the reference plane and the reference plane and the scattering pattern formed by projecting or recessing from the reference plane and the reference plane, And a second inclined surface having one inclined surface and one end tangent to the first inclined surface and forming a second angle with the reference surface; a light source part disposed adjacent to one side surface of the light guide plate; a plurality of light guide plates disposed on the light guide plate, And a prism sheet having a prism.

According to an aspect of the present invention, there is provided a liquid crystal display device including a backlight unit and a display panel disposed on the backlight unit, wherein the backlight unit includes a first side extending in the x- A first side surface and a second side surface opposite to each other between the upper surface and the lower surface, and the lower surface is formed by projecting or recessing from the reference surface and the reference surface, A light guide plate including a plurality of scattering patterns, the scattering pattern including a first inclined surface having a first angle with the reference surface and a second inclined surface having one end tangent to the first inclined surface and a second angle with the reference surface; And a prism sheet disposed on the light guide plate and having a plurality of prisms facing the upper surface of the light guide plate.

The details of other embodiments are included in the detailed description and drawings.

The embodiments of the present invention have at least the following effects.

That is, the light emitted by the light source can be directed toward the front surface of the display device, thereby improving the front exit light luminance.

Further, it is possible to provide a backlight unit and a liquid crystal display device improved in front exit light luminance.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a perspective view of a light guide plate according to an embodiment of the present invention.
2 is a sectional view of the light guide plate of Fig.
3 is a bottom view of the light guide plate of Fig.
4 is a partial enlarged view of the scattering pattern 300 of FIG.
Fig. 5 is a cross-sectional view taken along line I-I 'of Fig. 4;
Fig. 6 is a graph showing the relationship between the first angle? And the light condensing degree.
7 is a graph showing the relationship between the first angle (?) And the total flux.
8 is a graph showing the relationship between the first angle (?) And the front exit light luminance.
9 is a sectional view of the light guide plate of Fig.
10 is a cross-sectional view of a scattering pattern according to a modification of FIG.
11 is a bottom view of a light guide plate according to another embodiment of the present invention.
12 is a partially enlarged view of the scattering pattern of Fig. 13 is a cross-sectional view taken along line II-II 'of FIG.
14 is a cross-sectional view of a light guide plate scattering pattern according to a modification of FIG.
FIG. 15 is a cross-sectional view of a light guide plate scattering pattern boundary according to a modification of FIG. 13 taken along a direction parallel to a y-axis direction.
16 is a perspective view of a light guide plate according to another embodiment of the present invention.
17 is a cross-sectional view of the light guide plate of Fig. 18 is a bottom view of the light guide plate of Fig. 16;
19 is a partially enlarged view of the scattering pattern of Fig.
20 is a cross-sectional view of the scattering pattern of Fig. 19 taken along line III-III '.
21 is a sectional view of the light guide plate of Fig.
22 is a bottom view of a light guide plate according to another embodiment of the present invention.
23 is a partial enlarged view of the scattering pattern 304 of FIG.
FIG. 24 is a cross-sectional view of the scattering pattern 304 of FIG. 23 taken along line IV-IV '.
25 is a sectional view of a light guide plate scattering pattern according to a modification of FIG.
FIG. 26 is a cross-sectional view of the light guide plate scattering pattern boundary according to the modification of FIG. 24 in a direction parallel to the y-axis direction.
27 is a perspective view of a backlight unit according to an embodiment of the present invention.
28 is a sectional view of the backlight unit of Fig. 27;
29 is a sectional view of the backlight unit of Fig. 27;
30 is a graph showing the relationship between the first angle and the third angle and the front exit light luminance.
31 is a sectional view of a light guide plate according to a modification of Fig.
32 is a bottom view of a backlight unit according to another embodiment of the present invention.
33 is a bottom view of the backlight unit according to the modification of Fig.
34 is a bottom view of the backlight unit according to the modification of Fig.
35 is a bottom view of the backlight unit according to the modification of Fig.
36 is a partial perspective view of a backlight unit according to another embodiment of the present invention.
37 is a partial perspective view of a backlight unit according to another embodiment of the present invention.
38 is a perspective view of a backlight unit according to another embodiment of the present invention.
39 is a bottom view of the backlight unit of Fig.
40 is a cross-sectional view taken along the line V-V 'in FIG.
41 is a bottom view of the backlight unit according to the modification of Fig.
42 is a bottom view of the backlight unit according to the modification of Fig.
43 is an exploded perspective view of a liquid crystal display device according to an embodiment 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 scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

It will be understood that when an element or layer is referred to as being "on" of another element or layer, it encompasses the case where it is directly on or intervening another element or intervening layers or other elements. Like reference numerals refer to like elements throughout the specification.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

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

1 is a perspective view of a light guide plate according to an embodiment of the present invention. 2 is a sectional view of the light guide plate of Fig. 3 is a bottom view of the light guide plate of Fig.

1 and 3, a light guide plate 100 according to an exemplary embodiment of the present invention includes a top surface 110 (see FIG. 1) including a first side extending in the x-axis direction and a second side extending in the y- A lower surface 120 disposed opposite to the upper surface 110 and a first side surface 130 and a second side surface 140 disposed to face each other between the upper surface 110 and the lower surface 120, The scattering pattern 120 includes a plurality of scattering patterns 300 protruding or recessed from the reference plane 1201 and the reference plane 1201 and the scattering pattern includes a first inclined plane 310 and a second inclined surface 320 having one end contacting the first inclined surfaces 310 and 310 and forming a second angle alpha with the reference surface 1201.

The upper surface 110 may extend in the horizontal direction. 1 illustrates a case where the top surface 110 is a flat surface. However, the shape of the top surface 110 is not limited to this, and a pattern or the like having a specific shape may be disposed on the top surface 110, . A detailed description thereof will be described later.

In an exemplary embodiment, the top surface 110 may have a rectangular shape. That is, the top surface 110 may have four sides. In other words, the upper surface 110 may include a first side 110a extending in the x-axis direction and a second side 110b extending in the y-axis direction. In an exemplary embodiment, the second side 110b can be a tangent line that abuts the first side 130 described below.

The lower surface 120 is disposed opposite to the upper surface 110. The shape of the lower surface 120 may be the same as the shape of the upper surface 110. [ That is, the upper surface 110 and the lower surface 120 are parallel to each other, extend in the horizontal direction, and have substantially the same shape and can face each other. In the exemplary embodiment, the upper surface 110 and the lower surface 120 may have a rectangular shape, but the shapes of the upper surface 110 and the lower surface 120 are not limited thereto.

The first side surface 130 and the second side surface 140 may be disposed between the upper surface 110 and the lower surface 120. The upper and lower ends of the first side surface 130 and the second side surface 140 may contact both ends of the upper surface 110 and the lower surface 120. That is, the upper surface 110 and the lower surface 120 are the bottom surface of the cube, and the first side surface 130 and the second side surface 140 may be two surfaces facing each other among four side surfaces of the cube.

 At least one of the first side surface 130 and the second side surface 140 may be disposed adjacent to the light source unit 220 described later. That is, the light source unit 220 may be disposed to face the at least one light source unit 220. A detailed description thereof will be described later.

1, the thickness of the first side surface 130 and the thickness of the second side surface 140 may be different from each other, but the thickness of the first side surface 130 and the second side surface 140 may be different from each other . 1 illustrates a case where the first side surface 130 and the second side surface 140 are flat surfaces, but the present invention is not limited thereto. The first side surface 130 and the second side surface 140 may have a pattern of a specific shape . Illustratively, the first side surface 130 or the second side surface 140 may be at least partially formed with an uneven pattern.

The lower surface 120 may include at least one scattering pattern 300 protruding or recessed from the reference surface and the reference surface.

The reference surface 1201 may be a flat surface, which is a surface for protruding or depressing.

At least one scattering pattern 300 may be provided on the lower surface 120. The scattering patterns 300 may be arranged in a plurality of matrix shapes, but the scattering patterns 300 are not limited thereto, and may be scattered and arranged in an irregular arrangement. In addition, the size of each scattering pattern 300 may be substantially the same, but is not limited thereto, and the scattering patterns 300 may have different sizes.

The scattering pattern 300 may be formed by protruding or sinking from the reference plane. That is, the scattering pattern 300 may protrude downward from the reference surface 1201, or may be formed to be recessed toward the upper surface, that is, the upper surface 110, from the reference surface 1201. A detailed description of the scattering pattern 300 will be described later.

The light guide plate 100 including the upper surface 110, the lower surface 120, the first side surface 130 and the second side surface 140 may be formed of a transparent material. The term " transparent " as used herein can be understood as a concept including a semi-transmissive property that partially passes light or a semi-transmissive property that partially passes light.

In order to have a transparent material, the light guide plate 100 may be made of a material such as polycarbonate (PC), poly methyl methacrylate (PMMA), or the like. However, this is an example and the material of the light guide plate is not limited thereto.

In the exemplary embodiment, the light guide plate 100 may have flexibility. The flexibility of the light guide plate can be given based on the thickness, shape, material, etc. of the light guide plate, but is not limited thereto.

4 is a partial enlarged view of the scattering pattern 300 of FIG. Fig. 5 is a cross-sectional view taken along line I-I 'of Fig. 4;

4 and 5, the scattering pattern 300 may include a first inclined surface 310 and a second inclined surface 320. For convenience of explanation, the case where the scattering pattern 300 is protruded from the reference plane will be described first. The case where the scattering pattern 300 is recessed from the reference plane will be described later in detail.

The scattering pattern 300 may include a first inclined surface 310 and a second inclined surface 320. The first inclined surface 310 and the second inclined surface 320 may be arranged in alignment in the x-axis direction. That is, the second inclined surface 320 may be disposed at a portion adjacent to the first side surface 130 in the respective scattering patterns 300, and the first inclined surface 310 may be disposed at a portion adjacent to the second side surface 140 . That is, in the exemplary embodiment in which the light source 200 is disposed adjacent to the first side 130, the second slanted surface 320 is disposed at a portion adjacent to the first side 130 in each scattering pattern 300 And a first inclined surface 310 may be disposed at a portion adjacent to the second side surface 140.

The first inclined surface 310 and the second inclined surface 320 may be inclined downward from the reference plane. 5, the first inclined surface 310 and the second inclined surface 320 are formed to be inclined downward from the reference surface, respectively, and the ends of the first inclined surface 310 and the second inclined surface 320 The ends can be in contact with each other. That is, a boundary portion 330 where the end of the first inclined surface 310 and the end of the second inclined surface 320 meet can be formed. That is, when the scattering pattern 300 is cut along the line I-I ', its cross-sectional shape may be triangular. That is, the extension line of the reference surface, the first inclined surface 310, and the second inclined surface 320 may each be a triangle.

The first inclined surface 310 forms a first angle? With the reference surface and the second inclined surface 320 forms a second angle? With the reference surface. That is, in the cross-sectional view of FIG. 4, the first angle? And the second angle? Can be two triangles.

In an exemplary embodiment, the first angle beta may be smaller than the second angle alpha. The horizontal distance d1 of the first inclined surface 310 may be larger than the horizontal distance d2 of the second inclined surface 320. [

Further, in an exemplary embodiment, the first angle beta may be between 1.8 degrees and 5.7 degrees. Hereinafter, with reference to the experimental example, the effect when the first angle? Has a range of 1.8 to 5.7 degrees will be described.

Fig. 6 is a graph showing the relationship between the first angle? And the light condensing degree. 7 is a graph showing the relationship between the first angle (?) And the total flux. 8 is a graph showing the relationship between the first angle (?) And the front exit light luminance.

6 to 8, when the first angle β is in the range of 1.8 to 5.7 degrees, the front exit light luminance of the light passing through the upper surface 110 of the light guide plate to the upper portion of the light guide plate becomes the first angle ( beta) can be remarkably excellent as compared with a value other than 1.8 degrees to 5.7 degrees. In another exemplary embodiment, the first angle beta may be 3.3 degrees. When the first angle beta is 3.3 degrees, the outgoing light luminance of the light passing through the upper surface 110 of the light guide plate and going to the upper portion of the light guide plate may be the maximum. 6). The smaller the first angle (?), The smaller the total flux (see Fig. 7) The branching elements can have opposite effects in terms of the front exit light luminance. That is, the angular value of the most ideal first angle (?) In which the two elements are properly matched has important significance. In the exemplary experiment, the first angle (?) Is 1.8 to 5.7 degrees, beta) was 3.3 degrees, the most ideal front exit light luminance could be obtained.

The first inclined surface 310 and the second inclined surface 320 may have a rectangular shape in a plan view. However, this is illustrative, and the planar shape of the first inclined face 310 and the second inclined face 320 may be circular, or may be a shape including at least a part of a curve. A detailed description thereof will be described later.

To explain the path of light in the light guide plate according to an embodiment of the present invention, FIG. 6 is referred to

9 is a sectional view of the light guide plate of Fig.

Referring to FIG. 9, light emitted from the light source 220 disposed adjacent to the first side 130 may be totally reflected within the light guide plate 100 and proceed toward the upper surface 110 of the light guide plate.

For convenience of explanation, any one of a number of light beams emitted from the light source unit 220 will be described as an example. One of the light beams emitted from the light source 220 may be irradiated onto the upper surface 110 of the light guide plate. When the incidence angle of the light irradiated to the upper surface 110 of the light guide plate (the first incidence angle? 1 in FIG. 9) is larger than the critical angle, total reflection may occur. At this time, the light is reflected by the upper surface 110 of the light guide plate 110, and can proceed to the lower surface 120 of the light guide plate. Light traveling to the lower surface 120 of the light guide plate may touch the first inclined surface 310. The light that hits the first inclined surface 310 may be reflected and then directed to the upper surface 110 of the light guide plate. The incident angle of the light reflected by the first inclined plane 310 (the second incident angle? 2 in FIG. 9) may be smaller than the first incident angle? 1. In the exemplary embodiment, the second incident angle [theta] 2 may be smaller than the critical angle, and the light may pass through the upper surface 110 of the light guide plate and proceed to the upper portion of the light guide plate.

9, the light is reflected by the first inclined surface 310 through the total reflection once, and travels to the upper portion of the light guide plate 100. However, the light path is not limited thereto. That is, the light may proceed directly to the upper portion of the light guide plate 100 without going through the total reflection, or may proceed to the upper portion of the light guide plate 100 through at least one total reflection. In addition, the light having undergone at least one total reflection may be in contact with the first inclined surface 310 at least once. When the light reflected by the first inclined surface 310 and traveling to the upper surface 110 of the light guide plate is greater than the critical angle of incidence, total reflection takes place again on the upper surface 110 of the light guide plate 110, and the above procedure can be repeated. Also, in the exemplary embodiment, the light having undergone total reflection may be reflected by the second side surface 140 and proceed toward the upper surface 110 of the light guide plate or the lower surface 120 of the light guide plate.

Hereinafter, other embodiments of the present invention will be described. In the following embodiments, the same components as those already described are referred to as the same reference numerals, and redundant description will be omitted or simplified.

10 is a cross-sectional view of a scattering pattern according to a modification of FIG.

Referring to FIG. 10, the scattering pattern according to the modification of the present invention differs from the embodiment of FIG. 5 in that the second angle? Is substantially perpendicular.

In an exemplary embodiment, the second angle alpha may be substantially orthogonal. However, also in this case, the first angle? May be the same as in Fig. As the second angle alpha is substantially perpendicular and the first angle beta has the same angle as that of the embodiment of Figure 5, the horizontal distance dl of the first sloped surface 310 is greater than the horizontal distance dl of the embodiment of Figure 5 Can be relatively large compared to the horizontal distance d1 of the first inclined plane 310 of the scattering pattern.

Further, when the second angle alpha is substantially perpendicular, the horizontal distance of the second slanted surface 320a may be '0'. That is, the second inclined plane 320a may be a plane perpendicular to the reference plane 1201. [

11 is a bottom view of a light guide plate according to another embodiment of the present invention.

11, the light guide plate according to another embodiment of the present invention differs from the embodiment of FIG. 3 in that the plane shape of the scattering pattern 301 includes a curve.

 The planar shape of the scattering pattern 301 may include a curve. In other words, the outer periphery of each scattering pattern 301 may at least partially include a curve. In an exemplary embodiment, each scattering pattern 301 may be an elliptical shape having a major axis and a minor axis. In this case, the long axis may extend in the x-axis direction, and the short axis may extend in the y-axis direction.

12 to 13 are referred to for a specific description of the scattering pattern 301. [

12 is a partially enlarged view of the scattering pattern of Fig. 13 is a cross-sectional view taken along line II-II 'of FIG.

Referring to FIG. 12, the elliptical scattering pattern 301 may include a first inclined plane 311 and a second inclined plane 321.

The second inclined surface 321 is disposed at a portion adjacent to the first side surface 130 and the first inclined surface 311 is disposed at a portion adjacent to the second side surface 140 in each of the scattering patterns 301, As described in the embodiment.

Referring to FIG. 13, the cross-sectional shape taken along the line II-II 'of FIG. 12 may be substantially the same as the embodiment of FIG.

In other words, the cross-sectional shape obtained by cutting the scattering pattern 301 of Fig. 12 in the direction parallel to the x-axis direction may have a triangular shape. In other words, the outer periphery of the first inclined plane 311 and the second inclined plane 321 include at least partly curved lines, and the first inclined plane 311 and the second inclined plane 321 may be flat planes rather than curved planes . The boundary portion 331 between the first inclined plane 311 and the second inclined plane 321, that is, the boundary portion 331 where the ends of the first inclined plane 311 and the second inclined plane 321 meet, Can be a straight line.

14 is a cross-sectional view of a light guide plate scattering pattern according to a modification of FIG.

Referring to FIG. 14, the first inclined surface 312 and the second inclined surface 322 may include curved surfaces. That is, the cross-sectional shape in which the scattering pattern 302 is cut in the direction parallel to the x-axis may include a downwardly convex parabolic shape. That is, a part of the outer periphery of the cross-sectional shape may be parabolic. In other words, the first inclined surface 312 and the second inclined surface 322 are inclined downward from the reference surface 1201, and can form a gentle curved surface. In this case, however, the boundary portion 332 between the first inclined surface 312 and the second inclined surface 322 may be straight.

In this case, the first angle? Passes through the contact point between the first inclined plane 312 and the reference plane 1201 in Fig. 14, and the angle formed by the tangent line ll touching the first inclined plane 312 and the reference plane 1201 . ≪ / RTI > The second angle alpha is also the same as the first angle beta. The tangent line 12 which is in contact with the second inclined surface 322 passes through the contact point between the second inclined surface 322 and the reference surface 1201, Can be defined as the angle formed between the two. In this case, as described above, the first angle (?) Can have a value of 1.8 to 5.7 degrees.

FIG. 15 is a cross-sectional view of a light guide plate scattering pattern boundary according to a modification of FIG. 13 taken along a direction parallel to a y-axis direction.

The sectional shape obtained by cutting the boundary portion 332 between the first inclined plane 312 and the second inclined plane 322 of the light guide plate scattering pattern 302 in the direction parallel to the y axis direction in the exemplary embodiment may be a convex parabolic shape have.

In an exemplary embodiment, the scattering pattern may be formed to include all of the shapes of Figs. 14 and 15. Fig. In other words, in the exemplary embodiment, the scattering pattern 302 may include a parabolic shape in which the cross-sectional shape cut in the x-axis direction and the cross-sectional shape cut in the y-axis direction are both convex downward. In other words, the scattering pattern 302 may be a shape in which a cubic ellipse is cut along a horizontal plane including a long axis. In other words, the scattering pattern 302 may be a shape in which the rugby ball shape is cut along the plane including the long axis.

16 is a perspective view of a light guide plate according to another embodiment of the present invention. 17 is a cross-sectional view of the light guide plate of Fig. 18 is a bottom view of the light guide plate of Fig. 16;

16 to 18, the light guide plate according to another embodiment of the present invention differs from the embodiment of FIGS. 1 and 3 in that the scattering pattern 303 is recessed from the reference plane 1201. FIG.

The scattering pattern in the light guide plate according to another embodiment of the present invention may be formed to be recessed toward the upper surface 110 from the reference surface 1201 of the lower surface 120.

As described above, the reference surface 1201 is a flat surface, which may be a surface that is a reference for protrusion or depression.

At least one scattering pattern 303 may be provided on the lower surface 120. The scattering patterns 303 may be arranged in a plurality of matrix shapes, but the scattering patterns 303 are not limited thereto and may be scattered and arranged in an irregular arrangement. In addition, the size of each scattering pattern 303 may be substantially the same, but is not limited thereto, and the scattering patterns 303 may have different sizes.

The scattering pattern 303 may be formed by protruding or sinking from the reference surface 1201. Hereinafter, the case where the scattering pattern 303 is recessed from the reference plane 1201 will be described.

19 and 20 are referred to for a specific description of the shape of the scattering pattern 303. [

FIG. 19 is a partially enlarged view of the scattering pattern of FIG. 18, and FIG. 20 is a cross-sectional view of the scattering pattern of FIG. 19 taken along line III-III '.

Referring to FIGS. 19 and 20, the scattering pattern may include a first inclined plane 313 and a second inclined plane 323.

The first inclined plane 313 and the second inclined plane 323 may be arranged along the x-axis direction. However, unlike the embodiment of FIGS. 4 and 5, in the embodiment of FIGS. 19 and 20, the first inclined surface 313 is disposed at a portion adjacent to the first side surface 130 in each scattering pattern 303, And a second inclined surface 323 may be disposed at a portion adjacent to the side surface 140. That is, in the exemplary embodiment in which the light source portion 220 is disposed adjacent to the first side surface 130, the first inclined plane 313 of each scattering pattern 303 is relatively longer than the second inclined plane 323, 220 as shown in FIG.

The first inclined plane 313 and the second inclined plane 323 may be inclined upward from the reference plane 1201. 20, the first inclined plane 313 and the second inclined plane 323 are formed to be inclined upward from the reference plane 1201, respectively, and the ends of the first inclined plane 313 and the second inclined plane 323 may be in contact with each other. That is, a boundary portion 333 where the end portion of the first inclined plane 313 and the end portion of the second inclined plane 323 meet can be formed.

That is, when the scattering pattern 303 is cut along the line III-III ', its cross-sectional shape may be triangular. That is, the extension line of the reference plane 101, the first inclined plane 313, and the second inclined plane 323 may each be a triangle.

The first inclined plane 313 forms a first angle beta with the reference plane 1201 and the second inclined plane 323 forms a second angle alpha with the reference plane. That is, in FIG. 20, the first angle (?) And the second angle (?) May be two chambers of triangles.

In an exemplary embodiment, the first angle beta may be smaller than the second angle alpha. Accordingly, the horizontal distance d3 of the first inclined plane can be larger than the horizontal distance d4 of the second inclined plane.

Further, in an exemplary embodiment, the first angle beta may be between 1.8 degrees and 5.7 degrees. When the first angle beta is in the range of 1.8 to 5.7 degrees, the front exit light luminance is superior to that in the case of having different values as described in Figs. 6 to 8. Fig. The second angle alpha may be acute, but is not limited thereto, and in an exemplary embodiment the second angle alpha may be perpendicular.

The first inclined plane 313 and the second inclined plane 323 may have a rectangular shape in a plan view. However, this is illustrative, and the planar shape of the first inclined plane 313 and the second inclined plane 323 may be circular, or may be a shape including at least a part of a curve. A detailed description thereof will be described later.

Reference is made to Fig. 21 for explaining the path of light in the light guide plate according to another embodiment of the present invention.

21 is a sectional view of the light guide plate of Fig.

Referring to FIG. 21, the light emitted from the light source 220 disposed adjacent to the first side 130 may be totally reflected within the light guide plate, and proceed toward the upper surface 110 of the light guide plate.

For convenience of explanation, any one of a number of light beams emitted from the light source unit 220 will be described as an example. One of the light beams emitted from the light source 220 may be irradiated onto the upper surface 110 of the light guide plate. The total reflection may occur when the incident angle of the light irradiated onto the upper surface 110 of the light guide plate 110 (the first incident angle? 1 in FIG. 21) is greater than the critical angle. Light is reflected by the upper surface 110 of the light guide plate, 120). Light traveling to the lower surface 120 of the light guide plate can touch the first inclined surface 313. [ The light that hits the first inclined plane 313 is reflected and can be directed to the upper surface 110 of the light guide plate. The incident angle of the light reflected by the first inclined plane 313 (the second incident angle? 2 in FIG. 21) may be smaller than the first incident angle? 1. In the exemplary embodiment, the second incident angle [theta] 2 may be smaller than the critical angle, and the light may pass through the upper surface 110 of the light guide plate and proceed to the upper portion of the light guide plate.

In FIG. 21, the light is reflected by the first inclined surface 313 through one total reflection, and then travels to the upper portion of the light guide plate. However, the path of the light is not limited thereto. That is, the light may proceed directly to the upper portion of the light guide plate without total reflection, or may proceed to the upper portion of the light guide plate through at least one total reflection. In addition, the light having undergone total reflection at least once can contact the first inclined plane 313 at least once. In addition, when the light reflected from the first inclined surface 313 and traveling to the upper surface 110 of the light guide plate is greater than the critical angle, the total reflection occurs on the upper surface 110 of the light guide plate 110, and the above procedure can be repeated. Also, in the exemplary embodiment, the light having undergone total reflection may be reflected by the second side surface 140 and proceed toward the upper surface 110 of the light guide plate or the lower surface 120 of the light guide plate.

That is, the path through which light emitted from the light source unit 220 moves in the light guide plate may be substantially the same as that described in the embodiment of FIG.

22 is a bottom view of a light guide plate according to another embodiment of the present invention.

Referring to FIG. 22, the light guide plate according to another embodiment of the present invention differs from the embodiment of FIG. 18 in that the plane shape of the scattering pattern 304 includes a curve.

The planar shape of the scattering pattern 304 may include a curve. In other words, the perimeter of each scattering pattern 304 may comprise a curve, at least in part. In an exemplary embodiment, each scattering pattern 304 may be an elliptical shape having a major axis and a minor axis. In this case, the long axis is aligned with the x-axis direction, and the short axis is aligned with the y-axis direction.

See FIGS. 23 and 24 for a specific description of the scattering pattern 304. FIG.

23 is a partial enlarged view of the scattering pattern 304 of FIG. FIG. 24 is a cross-sectional view of the scattering pattern 304 of FIG. 23 taken along line IV-IV '.

Referring to FIG. 23, the elliptical scattering pattern 304 may include a first inclined plane 314 and a second inclined plane 324.

In the scattering pattern 304, the first inclined surface 314 is disposed at a portion adjacent to the first side surface 130, and the second inclined surface 324 is disposed at a portion adjacent to the second side surface 140. In this case, As described above.

Referring to FIG. 24, the cross-sectional shape taken along the line IV-IV 'of the scattering pattern 304 of FIG. 23 may be substantially the same as the embodiment of FIG.

In other words, the cross-sectional shape obtained by cutting the scattering pattern 304 in Fig. 24 in the direction parallel to the x-axis direction may have a triangular shape. In other words, the outer periphery of the first sloped surface 314 and the second sloped surface 324 include at least partly curved lines, and the first sloped surface 314 and the second sloped surface 324 may be flat surfaces rather than curved surfaces . Accordingly, the boundary portion between the first inclined plane 314 and the second inclined plane 324, that is, the boundary portion between the first inclined plane 314 and the second inclined plane 324, may be a straight line parallel to the y-axis direction.

25 is a sectional view of a light guide plate scattering pattern according to a modification of FIG.

Referring to FIG. 25, the first inclined plane 315 and the second inclined plane 325 may include curved surfaces.

That is, the cross-sectional shape obtained by cutting the scattering pattern in the direction parallel to the x-axis may be a convex paraboloid shape. That is, the first inclined plane 315 and the second inclined plane 325 are inclined upward from the reference plane 1201, and a gentle curved surface can be formed. In this case, however, the boundary portion 334 between the first inclined plane 315 and the second inclined plane 325 may be straight.

In this case, the first angle beta is an angle formed between the tangential line 13 contacting the first inclined plane 315 and the reference plane 1201, passing through the contact point between the first inclined plane 315 and the reference plane 1201 in Fig. Can be defined. 25, the second angle? Passes through the contact point where the second inclined plane 325 and the reference plane 1201 contact with each other, and the tangent line 14, which is in contact with the second inclined plane 325, May be defined as an angle formed by the first electrode 1201. In this case, as described above, the first angle (?) Can have a value of 1.8 to 5.7 degrees.

Fig. 26 is a cross-sectional view of the light guide plate scattering pattern boundary 334 according to the modification of Fig. 24, taken in a direction parallel to the y-axis direction.

In the exemplary embodiment, the sectional shape obtained by cutting the boundary portion 334 between the first inclined plane 315 and the second inclined plane 325 of the light guide plate scattering pattern in the direction parallel to the y-axis direction may be convex parabolic shape downward.

In an exemplary embodiment, the scattering pattern may be formed to include all of the shapes of FIG. 25 and FIG. In other words, in the exemplary embodiment, the scattering pattern may have a parabolic shape in which the cross-sectional shape cut in the x-axis direction and the cross-sectional shape cut in the y-axis direction are both convex upward. In other words, the scattering pattern may be a shape in which a cubic ellipse is cut along a horizontal plane including a long axis. In other words, the scattering pattern may be a shape in which the rugby ball shape is cut along the plane including the long axis.

27 is a perspective view of a backlight unit according to an embodiment of the present invention. 28 is a sectional view of the backlight unit of Fig. 27;

27 and 28, a backlight unit according to an embodiment of the present invention includes a top surface 110 including a first side extending in the x-axis direction and a second side extending in the y-axis direction, a top surface 110 And a lower surface 120. The lower surface 120 includes a first side surface 130 and a second side surface 140 that are disposed to face each other between the upper surface 110 and the lower surface 120, The scattering pattern 300 includes a plurality of scattering patterns 300 protruding or recessed from the reference surface 1201 and the reference surface 1201. The scattering pattern 300 includes a first inclined surface forming a first angle β with the reference surface 1201, A light guide plate 100 including a second inclined surface contacting the first inclined surface and making a second angle alpha with the reference surface 1201, a light source 220 disposed adjacent to the first side 130 of the light guide plate 100, And a prism sheet 400 disposed on the light guide plate 100 and having a plurality of prisms 410 facing the upper surface 110 of the light guide plate 100.

The light guide plate 100 may be substantially the same as the light guide plate 100 according to some embodiments of the present invention. Therefore, a detailed description thereof will be omitted.

The light source unit 220 may be disposed adjacent to the first side surface 130 of the light guide plate 100. The light source unit 220 may include a base 220 extending in the y-axis direction, and a light source disposed on at least one side of the base 220.

The base 220 serves to support at least one light source, and may have a bar shape extending in the y-axis direction. In an exemplary embodiment, a sidewall may be formed on one side of the base 220 to at least partially surround the sides of the light source.

At least one light source may be provided on one side of the base 220, that is, the side opposite to the first side 130 of the light guide plate 100. The light source may be a light emitting diode (LED), but this is merely exemplary and the type of light source is not limited thereto.

In an exemplary embodiment, the plurality of light sources may be disposed at regular intervals along the y-axis direction.

A prism sheet 400 may be disposed on the light guide plate 100. The prism sheet 400 may be disposed on the upper surface 110 of the light guide plate 100 or spaced apart from the upper surface 110 of the light guide plate 100 by a predetermined distance.

The prism sheet 400 may include a plurality of prisms 410. The plurality of prisms 410 may be disposed along the x-axis direction, and each prism 410 may extend along the y-axis direction. That is, a plurality of prisms 410 having a bar shape may be arranged in a direction parallel to the y-axis.

Each prism 410 may have a mountain portion. The peak of the prism 410 may be disposed to face the upper surface 110 of the light guide plate 100. 28, the cross section of the prism 410 cut in the x-axis direction has a triangular shape. The prism 410 has a triangular shape, which is the closest to the top surface 110 of the light guide plate 100 It can mean near the vertex.

FIG. 29 is referred to in order to explain a light path of light irradiated from the light source unit 220 in the backlight unit according to an embodiment of the present invention.

29 is a sectional view of the backlight unit of Fig. 27;

29, the light emitted from the light source 220 disposed adjacent to the first side 130 is totally reflected within the light guide plate 100 and then transmitted through the upper surface 110 of the light guide plate 100, . ≪ / RTI >

For convenience of explanation, any one of a number of light beams emitted from the light source unit 220 will be described as an example. Any one of the light beams emitted from the light source 220 may be directed toward the upper surface 110 of the light guide plate 100. Total incidence may occur when the incidence angle of the light irradiated to the upper surface 110 of the light guide plate 100 (the first incidence angle in FIG. 29) is larger than the critical angle. At this time, the light is reflected by the upper surface 110 of the light guide plate 100 and can proceed to the lower surface 120 of the light guide plate 100. Light traveling to the lower surface 120 of the light guide plate 100 can reach the first inclined surface. The light that comes into contact with the first inclined surface is reflected and can be directed to the upper surface 110 of the light guide plate 100 again. The incident angle of the light reflected on the first inclined surface (the second incident angle in FIG. 29) may be smaller than the first incident angle. In an exemplary embodiment, the second incident angle may be smaller than the critical angle, and the light may pass through the upper surface 110 of the light guide plate 100 and proceed to the upper portion of the light guide plate 100.

When the second incident angle is smaller than the critical angle, the light transmitted through the upper surface 110 of the light guide plate 100 has the third refraction angle 3 and can proceed toward the prism sheet 400. Light traveling at a third refraction angle 3 is transmitted through one side of one prism 410 and reflected from the other side of the prism 410 to be reflected toward the top of the prism sheet 400 You can proceed.

More specifically, the light on the upper surface 110 of the light guide plate 100 may be expressed by the following equation (120).

Equation 1

Here, θi is an incident angle, n2 is a refractive index of the light guide plate 100, and n3 is a refractive index of the prism sheet 400. Further,? May be a third angle?. That is, according to the above equation, the optimal first angle? According to a specific incident angle can be calculated. According to the experiment (refer to FIG. 30) conducted on the basis of this equation, when the first angle? Is about 3.3 degrees and the third angle? Is about 65 degrees, And has an emission luminance value. It can also be seen that when the first angle beta is about 2.3 degrees and the third angle gamma is about 68 degrees, the backlight unit has the second greatest front luminance value. That is, the above two cases have an effect of having remarkably excellent front luminance as compared with the case where the first angle (?) Has different values.

31 is a sectional view of a light guide plate according to a modification of Fig.

31, the scattering pattern 303 of the light guide plate is depressed from the reference surface 1201 toward the top surface 110, which is different from the embodiment of FIG.

As described above, the scattering pattern 303 may be recessed toward the upper surface 110 from the reference surface 1201 of the lower surface 120 of the light guide plate. Further, when the scattering pattern 303 is recessed, the light path in the light guide plate may be substantially the same as the embodiment of Fig. That is, when the light reflected by the upper surface 110 of the light guide plate 110 and directed toward the lower surface 120 of the light guide plate is reflected by the first inclined surface 313 and the incident angle of the reflected light is greater than the critical angle, The light advances toward one side of the prism 410 and is reflected from the other side of the prism 410 to be reflected by the front surface of the prism 410, And can proceed toward the upper portion of the sheet 400.

32 is a bottom view of a backlight unit according to another embodiment of the present invention.

Referring to FIG. 32, the scattering pattern 301 of the backlight unit light guide plate according to another embodiment of the present invention may have a higher density of the scattering pattern 301 as the distance from the light source unit 220 increases.

As described above, the scattering pattern 301 of the light guide plate 120 may be regularly or irregularly arranged. Further, as described above, the plurality of scattering patterns 301 may be arranged in a matrix form having a plurality of rows and a plurality of rows. In the exemplary embodiment, the plurality of scattering patterns 301 may be disposed further away from the light source portion 220. In other words, the density of the scattering pattern 301 increases as the distance from the light source 220 increases. That is, the number of the scattering patterns 301 per unit area can be increased as the distance from the light source 220 is increased. In other words, the number of the scattering patterns 301 per unit area can be increased toward the positive x-axis direction on the lower surface 120 of the light guide plate.

33 is a bottom view of the backlight unit according to the modification of Fig.

Referring to FIG. 33, the scattering pattern 301 of the backlight unit light guide plate according to the modification of FIG. 32 is different from FIG. 32 in that the scattering pattern 301 is irregularly arranged. As described above, the scattering pattern 301 of the light guide plate can be irregularly arranged. In this case, however, the number of the scattering patterns 301 per unit area may be increased toward the direction away from the first side surface 130 or the light source 220, that is, toward the positive direction of the x-axis in the lower surface 120 of the light guide plate .

34 is a bottom view of the backlight unit according to the modification of Fig.

Referring to FIG. 34, the scattering pattern 301 of the backlight unit light guide plate according to the modification of FIG. 34 is different from the embodiment of FIG. 32 in that the sizes of the scattering patterns 301 are different from each other.

The size of the scattering pattern 301 in the backlight unit according to another embodiment of the present invention may be different.

In an exemplary embodiment, the size of the scattering pattern 301 may increase in the positive x-axis direction. In other words, the size of the scattering pattern 301 may be increased in a direction away from the first side surface 130 or the light source unit 220 in the lower surface 120 of the light guide plate. That is, the ratio of the area occupied by the scattering pattern 301 per unit area toward the positive x-axis direction on the lower surface 120 of the light guide plate can be increased.

35 is a bottom view of the backlight unit according to the modification of Fig.

The scattering pattern 301 of the backlight unit light guide plate according to the modified example of FIG. 35 is arranged so that the scattering pattern 301 per unit area becomes closer to the first center line c1 crossing the central portion of the lower surface 120 of the light guide plate in the direction parallel to the x- The difference from FIG. 32 is that the number increases.

A first center line c1 that intersects the center of the lower surface 120 of the light guide plate can be defined. The first center line c1 may cross the center of the lower surface 120 of the light guide plate in a direction parallel to the x-axis. The number of scattering patterns 301 on the lower surface 120 of the light guide plate can be increased as the center line is closer to the center line. That is, the number of the scattering patterns 301 per unit area may be increased toward the center of the lower surface 120 of the light guide plate in the third and fourth sides perpendicular to the first side surface 130 and the second side surface 140 of the light guide plate .

36 is a partial perspective view of a backlight unit according to another embodiment of the present invention.

Referring to FIG. 36, the upper surface 110 of the backlight unit LGP according to another embodiment of the present invention is different from the embodiment of FIG. 27 in that it includes an inclined surface.

In an exemplary embodiment, the upper surface 110 of the light guide plate may include an inclined surface. More specifically, the upper surface 110 of the light guide plate includes a first flat surface 111a extending in the horizontal direction from the upper end of the first side surface 130, a first flat surface 111a extending downward from the end of the first flat surface 111a, And a second flat surface 111c extending in the horizontal direction from an end of the inclined surface 111b.

The end of the second flat surface 111c may be in contact with the upper end of the second side surface 140. In an exemplary embodiment in which the top surface 110 of the light guide plate includes an inclined surface, the thickness of the first side surface 130 and the thickness of the second side surface 140 may be different. That is, the thickness of the first side 130 may be relatively large compared to the thickness of the second side 140.

37 is a partial perspective view of a backlight unit according to another embodiment of the present invention.

Referring to FIG. 37, a diffuser pattern 112a is formed on an upper surface 112 of a backlight unit according to another embodiment of the present invention. This differs from the embodiment of FIG.

In an exemplary embodiment, a plurality of diffusion patterns 112a may be formed on the upper surface 112 of the light guide plate. In the exemplary embodiment, a plurality of diffusion patterns 112a are arranged along the x-axis direction, and each diffusion pattern 112a may extend along the y-axis direction. That is, each of the diffusion patterns 112a may have a bar shape extending along the y-axis direction. 37 exemplifies a case where the cross-sectional shape of each diffusion pattern 112a is semicircular, but this is not limitative and the cross-sectional shape of the diffusion pattern 112a may be polygonal.

38 is a perspective view of a backlight unit according to another embodiment of the present invention. 39 is a bottom view of the backlight unit of Fig. 40 is a cross-sectional view taken along the line V-V 'in FIG.

Referring to FIGS. 38 to 40, the backlight unit according to another embodiment of the present invention is different from the embodiment of FIG. 27 in that the backlight unit further includes a second light source unit 221 adjacent to the second side surface 140.

The backlight unit according to another embodiment of the present invention may include two light sources 220. That is, the first light source unit 220 may be disposed adjacent to the first side 130, and the second light source unit 221 may be disposed adjacent to the second side 140.

The second light source unit 221 may include at least one light source formed on one side of the base 220 and the base 220. Since the second light source unit 221 may be substantially the same as the first light source unit 220 described above, a detailed description thereof will be omitted.

In an exemplary embodiment in which the backlight unit includes two light source portions 220, the lower surface 120 of the light guide plate may have a shape that is symmetrical with respect to each other.

To be more specific, the first angle? And the second angle? Formed between the first inclined plane 316 and the second inclined plane 326 with the reference plane may be substantially equal to each other. That is, the horizontal distance d5 of the first inclined plane 316 and the horizontal distance d6 of the second inclined plane 326 may be substantially the same. That is, as shown in FIG. 40, the shape formed by the extension line of the first inclined plane 316, the second inclined plane 326, and the reference plane 1201 may be an isosceles triangle.

41 is a bottom view of the backlight unit according to the modification of Fig.

Referring to FIG. 41, the bottom surface 120 of the backlight unit according to the modification of FIG. 39 is divided into the first area 127 and the second area 128 by the second center line. It is different.

A second center line c2 passing through the central portion of the light guide plate in a direction parallel to the y-axis direction and bisecting the lower surface 120 of the light guide plate is defined. That is, the lower surface 120 of the light guide plate 120 can be separated into the first area 127 and the second area 128 by the second center line c2.

The scattering pattern 307 disposed in the first region 127 and the scattering pattern 308 disposed in the second region 128 may be disposed in directions opposite to each other. That is, the scattering pattern 307 disposed in the first region 127 may be a mirror image of the scattering pattern 308 disposed in the second region 128.

In the exemplary embodiment, each scattering pattern 307 disposed in the first region 127 has a second inclined surface disposed at a portion adjacent to the first side surface 130 and a first inclined surface at a portion adjacent to the second center line c1. An inclined plane can be disposed. However, this is an example of a scattering pattern formed protruding from the reference plane 1201, and the positions of the first slope and the second slope may be changed in the case of the recessed scattering pattern.

The scattering pattern 308 disposed in the second region 128 corresponds to the second slope and the second slope is disposed at a portion adjacent to the second side 140 and the first slope is disposed at a portion adjacent to the second centerline c2 . That is, the first inclined plane and the second inclined plane may be disposed in a direction opposite to the scattering pattern 307 disposed in the first region.

42 is a bottom view of the backlight unit according to the modification of Fig.

41, the scattering patterns 307 and 308 of the backlight unit according to the modified example of FIG. 41 show that the number of the scattering patterns 307 and 308 per unit area increases as the distance to the second center line c2 increases, .

As described above, the density of the scattering patterns 307 and 308 may be different from each other on the lower surface 120 of the light guide plate. In an exemplary embodiment, the density of the scattering patterns 307, 308 may increase from the first side 130 and the second side 140 toward the second centerline. That is, the number of scattering patterns 307 and 308 per unit area can be increased from the first side 130 to the second centerline and from the second side 140 to the second centerline.

43 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention. 43, a liquid crystal display according to an embodiment of the present invention includes a backlight unit and a display panel disposed on the backlight unit, wherein the backlight unit includes a first side extending in the x- A first side surface 130 disposed opposite to the upper surface 110 and the lower surface 120 so as to face each other and a lower surface 120 disposed opposite to the upper surface 110; The scattering pattern 300 includes a second side surface 140 and the bottom surface 120 includes a plurality of scattering patterns 300 protruding or recessed from the reference surface 1201 and the reference surface 1201, And a second inclined surface 320 having one end tangent to the first inclined surface 310 and a second angle alpha to the reference surface 1201. The first inclined surface 310 and the second inclined surface 320 form a first angle? A light source unit 220 disposed adjacent to one side surface of the light guide plate 100, a light guide plate disposed on the light guide plate 100, And a prism sheet 400 having a plurality of prisms facing the plate surface 110.

The backlight unit may be substantially the same as the backlight unit according to some embodiments of the present invention described above. Therefore, a detailed description thereof will be omitted.

The liquid crystal display 1000 according to an exemplary embodiment of the present invention may further include a display panel 160, a top chassis 150, a bottom chassis 152, and the like. A liquid crystal display 1000 according to an embodiment of the present invention will be described in detail as follows.

The display panel 160 includes a display area and a non-display area. The display panel 160 includes a first substrate 162, a second substrate 161 facing the first substrate, a driving unit 164 attached to the liquid crystal layer (not shown) and the first substrate 162, And may include a printed circuit board 167.

The display area of the display panel 160 refers to an area where an image is displayed, and the non-display area of the display panel 160 can refer to an area where an image is not displayed. In an exemplary embodiment, the display region may be located at a central portion of the region where the first substrate 162 and the second substrate 161 overlap, and the non-display region may be located between the first substrate 162 and the second substrate 161 161 may be located at the edge of the overlapping area. The display area may be an area where the display panel 160 and the top chassis 150 do not overlap, and the non-display area may be an area where the display panel 160 and the top chassis 150 overlap. In addition, the shape of the display region is similar to the shape of the second substrate 162, and the internal area thereof may be small. In addition, the boundary lines of the display area and the non-display area may be parallel to the sides of the second substrate 162 opposite to each other. The shape formed by the boundary line between the display area and the non-display area may be a rectangular shape.

At least a portion of the first substrate 161 may overlap the second substrate 162. The central portion of the region where the first substrate 161 and the second substrate 162 overlap may be the display region and the edge portion of the region where the first substrate 161 and the second substrate 162 overlap is not displayed Lt; / RTI > The driving unit 164 and the printed circuit board 167 may be attached to areas where the first substrate 161 and the second substrate 162 do not overlap.

The second substrate 162 may be disposed opposite to the first substrate 161. A liquid crystal layer may be interposed between the first substrate 161 and the second substrate 162. A sealing member such as a sealant is disposed between the first substrate 161 and the second substrate 162 along the rims of the first substrate 161 and the second substrate 162, The substrates 162 may be bonded together and sealed.

The first substrate 161 and the second substrate 162 may have a rectangular parallelepiped shape. The shapes of the first substrate 161 and the second substrate 162 are shown in a rectangular parallelepiped shape for convenience of explanation but the present invention is not limited thereto. The substrate 162 may be manufactured in various shapes.

The driving unit 164 can apply various signals such as a driving signal required to display an image in the display area. The printed circuit board 167 can output various signals to the driving unit 164.

An optical sheet 126, a backlight unit, and a bottom chassis 152 may be disposed on the back surface of the display panel 160. [ Referring back to the positional relationship with reference to the backlight unit, the optical sheet 126 may be disposed on the upper portion of the backlight unit, and the bottom chassis 152 may be disposed on the lower portion of the backlight unit.

At least one optical sheet 121 for modulating the optical characteristics of light and a mold frame 151 for accommodating the optical sheets 121 may be disposed on the backlight unit.

Here, the mold frame 151 may contact the edge portion of the other surface of the display panel 160 to support and fix the display panel 160. In the exemplary embodiment, the rim portion of the other surface of the display panel 160 may be a non-display region of the display panel 160. [ That is, at least a part of the mold frame 151 may overlap the non-display area of the display panel 160. [

The top chassis 150 covers the rim of the display panel 160 and can cover the side surface of the display panel 160. The bottom chassis 152 can house the optical sheet 121 and the backlight unit 300. The top chassis 150 and the bottom chassis 152 may be made of a material having conductivity, for example, a metal.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100: light guide plate
110, 111: upper surface
120: When
130: First aspect
140: Second side
200: light source
210: Light source
220: Base
300, 301, 302, 303, 304, 305, 306, 307, 308: scatter pattern
1201: Reference plane
400: prism sheet
410: prism
1000: liquid crystal display
160: Display panel
150: Top chassis
151: Mold frame
152: bottom chassis

Claims (30)

an upper surface including a first side extending in the x-axis direction and a second side extending in the y-axis direction;
A lower surface opposed to the upper surface;
And a first side and a second side disposed opposite to each other between the upper surface and the lower surface,
Wherein the lower surface includes a reference plane and a plurality of scattering patterns formed by projecting or sinking from the reference plane,
Wherein the scattering pattern includes a first inclined surface having a first angle with the reference surface and a second inclined surface having one end contacting the first inclined surface and forming a second angle with the reference surface,
Wherein the first angle is 1.8 to 5.7 degrees The method according to claim 1,
Wherein a horizontal distance between the first inclined surface and the second inclined surface is different. The method according to claim 1,
Wherein the first angle is 3.3 degrees. The method according to claim 1,
And the second angle is a right angle. The method according to claim 1,
The planar shape of the scattering pattern is an elliptical shape having a long axis and a short axis,
Wherein the long axis extends in the x-axis direction and the minor axis extends in the y-axis direction. The method according to claim 1,
Wherein the first inclined surface and the second inclined surface have a curved outer periphery, wherein the first inclined surface and the second inclined surface are flat surfaces. The method according to claim 1,
Wherein the scattering pattern is protruded from the reference plane,
The cross-sectional shape obtained by cutting the scattering pattern in the x-axis direction includes a convex parabola upwardly convex,
And a cross-sectional shape obtained by cutting the scattering pattern in the y-axis direction includes a convex parabola upward. The method according to claim 1,
The scattering pattern is recessed toward the upper surface from the reference plane,
The cross-sectional shape obtained by cutting the scattering pattern in the x-axis direction includes a downwardly convex parabola,
And a cross-sectional shape obtained by cutting the scattering pattern in the y-axis direction includes a downward convex parabola. The method according to claim 1,
Wherein the first inclined surface and the second inclined surface include curved surfaces. an upper surface including a first side extending in the x-axis direction and a second side extending in the y-axis direction;
A lower surface opposed to the upper surface;
And a first side and a second side disposed opposite to each other between the upper surface and the lower surface,
Wherein the lower surface includes a reference plane and a plurality of scattering patterns formed by projecting or sinking from the reference plane,
Wherein the scattering pattern includes a first inclined surface having a first angle with the reference surface and a second inclined surface having one end contacting the first inclined surface and forming a second angle with the reference surface,
Wherein the first angle is 1.8 to 5.7 degrees;
A light source unit disposed adjacent to a first side surface of the light guide plate; And
And a prism sheet disposed on the light guide plate and having a plurality of prisms facing the upper surface of the light guide plate. 11. The method of claim 10,
The plurality of prisms are arranged along the x-axis direction, and the prisms extend along the y-axis direction
Backlight unit. 11. The method of claim 10,
Wherein each of the prisms includes a peak portion, and the peak portion is disposed to face the upper surface of the light guide plate. 13. The method of claim 12,
A third angle which is an internal angle of the mountain portion is defined,
The first angle is 3.3 degrees,
And the third angle is 65 degrees. 13. The method of claim 12,
A third angle which is an internal angle of the mountain portion is defined,
The first angle is 2.3 degrees,
And the third angle is 68 degrees. 11. The method of claim 10,
The planar shape of the scattering pattern is an elliptical shape having a long axis and a short axis,
Wherein the long axis extends in the x-axis direction, and the short axis extends in the y-axis direction. 11. The method of claim 10,
Wherein the first inclined surface and the second inclined surface include a curved line, and the first inclined surface and the second inclined surface are flat surfaces. 11. The method of claim 10,
Wherein the scattering pattern is protruded from the reference plane,
The cross-sectional shape obtained by cutting the scattering pattern in the x-axis direction includes a convex parabola upwardly convex,
And the cross-sectional shape obtained by cutting the scattering pattern in the y-axis direction includes a convex parabola upward. 11. The method of claim 10,
The scattering pattern is recessed toward the upper surface from the reference plane,
The cross-sectional shape obtained by cutting the scattering pattern in the x-axis direction includes a downwardly convex parabola,
Wherein the cross-sectional shape obtained by cutting the scattering pattern in the y-axis direction includes a downwardly convex parabola. 11. The method of claim 10,
Wherein the first inclined surface and the second inclined surface include curved surfaces. 11. The method of claim 10,
Wherein the number of the scattering patterns increases with an increase in the x-axis positive direction from a bottom surface of the light guide plate. 11. The method of claim 10,
Wherein a size of each of the scattering patterns in the lower surface of the light guide plate increases in a positive x-axis direction. 11. The method of claim 10,
The upper surface of the light guide plate has a first flat surface extending in the horizontal direction from the upper end of the first side surface, a second flat surface extending in the horizontal direction from the end surface of the inclined surface, Including backlight unit. 11. The method of claim 10,
And a plurality of diffusion patterns are formed on the upper surface of the light guide plate. 11. The method of claim 10,
And a second light source unit adjacent to the second side. Backlight unit; And
And a display panel disposed above the backlight unit,
The backlight unit
an upper surface including a first side extending in the x-axis direction and a second side extending in the y-axis direction;
A lower surface opposed to the upper surface;
And a first side and a second side disposed opposite to each other between the upper surface and the lower surface,
Wherein the lower surface includes a reference plane and a plurality of scattering patterns formed by projecting or sinking from the reference plane,
Wherein the scattering pattern includes a first inclined surface having a first angle with the reference surface and a second inclined surface having one end contacting the first inclined surface and forming a second angle with the reference surface,
Wherein the first angle is 1.8 to 5.7 degrees;
A light source unit disposed adjacent to a first side surface of the light guide plate; And
And a prism sheet disposed on the light guide plate and having a plurality of prisms opposed to the upper surface of the light guide plate. 26. The method of claim 25,
Wherein each of the prisms includes a peak and the peak is disposed to face the upper surface of the light guide plate. 27. The method of claim 26,
A third angle which is an internal angle of the mountain portion is defined,
The first angle is 3.3 degrees,
And the third angle is 65 degrees. 27. The method of claim 26,
A third angle which is an internal angle of the mountain portion is defined,
The first angle is 2.3 degrees,
And the third angle is 68 degrees. 26. The method of claim 25,
Wherein the scattering pattern is protruded from the reference plane,
The cross-sectional shape obtained by cutting the scattering pattern in the x-axis direction includes a convex parabola upwardly convex,
And the cross-sectional shape obtained by cutting the scattering pattern in the y-axis direction includes a convex parabola upward. 26. The method of claim 25,
The scattering pattern is recessed toward the upper surface from the reference plane,
The cross-sectional shape obtained by cutting the scattering pattern in the x-axis direction includes a downwardly convex parabola,
Wherein the cross-sectional shape obtained by cutting the scattering pattern in the y-axis direction includes a downwardly convex parabola.

Images