KR20180024387A - Light emitting diode assembly and backlight unit having the same and liquid crystal display device having the same - Google Patents

Abstract

The present invention relates to a light emitting diode assembly, a backlight unit including the same and a liquid crystal display device including the same. A printed circuit board of an LED assembly has a pattern unit having a groove of an inverted trapezoidal shape to increase transfer efficiency of light, outputted from LED packages, without increasing the number of LED packages, thereby increasing brightness.

Description

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode assembly, a backlight unit including the light emitting diode assembly, and a liquid crystal display device including the LED assembly, wherein a protruding pattern portion having grooves with an inverted trapezoidal shape is applied to a space between the LED packages Emitting diode assembly, a backlight unit including the same, and a liquid crystal display including the same.

A liquid crystal display device (LCD), which is advantageous for moving picture display and has a large contrast ratio and is actively used in TVs and monitors, exhibits optical anisotropy and polarization properties of a liquid crystal, And the like.

Such a liquid crystal display device has a liquid crystal panel in which a liquid crystal panel is interposed between two adjacent substrates through a liquid crystal layer as an essential component and changes the alignment direction of the liquid crystal molecules in an electric field in the liquid crystal panel to realize a difference in transmittance do.

However, since the liquid crystal panel does not have its own light emitting element, a separate light source is required to display the difference in transmittance as an image. To this end, a backlight unit having a light source is disposed on the back of the liquid crystal panel.

The backlight unit is divided into a direct type and an edge type according to the position of the light source. The backlight unit of the direct-type type has a structure in which light emitted from a light source is directly The backlight unit of the side type system has a structure in which a light guide plate is disposed under the liquid crystal panel and a light source is disposed on at least one side of the light guide plate so that light emitted from the light source is reflected indirectly To the liquid crystal panel.

Here, as a light source of the backlight unit, a light emitting diode (LED) having a merit in terms of power consumption, weight, brightness and the like is widely used.

At this time, a plurality of LED packages mounted on a frame are mounted on a printed circuit board (PCB) at a predetermined interval to form an LED assembly.

In recent years, the liquid crystal display device has been used in a wide range of applications such as a desktop computer monitor and a wall-mounted television, as well as a portable computer, and studies on a light-weight, thin and narrow bezel and a high- It is progressing.

1A and 1B are diagrams showing the progress of light output from the LED assembly

1A and 1B, a part of the light output through the LED package 11 is incident (①) into a light guide plate (LGP) 20, and a part of the light not incident The light is reflected from the light incident surface of the light guide plate 20 and reflected again by a printed circuit board (PCB) 13 to be reentered into the light guide plate 20 or directly into the light guide plate 20, And then recycled to the inside of the light guide plate 20 by the side reflector of the light guide plate 20 and then reflected by the upper side of the printed circuit board 13 through the recycling process.

The efficiency of the light re-incident through the recycling process according to (2) and (3) is such that the distance from the LED package 11 to the light incident surface of the light guide plate 20 or between the printed circuit board 11 and the light incident surface of the light guide plate 20 d), the light transmission efficiency is reduced.

At this time, by increasing the number of the LED packages 11 disposed in the LED assembly 10, a high luminance liquid crystal display device can be realized. However, the spacing between the LED packages 11 and the length of the printed circuit board 13 are determined Therefore, there is a limit to increase the number of the LED packages 11.

In addition, when the number of the LED packages 11 is increased, the spacing between the LED packages 11 is minimized and the number of LED packages 11 is increased. Therefore, the total heat generated from the plurality of LED packages 11 is increased. If the heat is not properly discharged, a deterioration phenomenon occurs in the LED package 11, the light efficiency is lowered and the lifetime of the LED package 11 is shortened.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and it is an object of the present invention to provide a printed circuit board having a projected pattern portion having grooves having an inverted trapezoidal shape without increasing the number of LED packages, And a backlight unit including the same, and a liquid crystal display device including the backlight unit.

According to an aspect of the present invention, there is provided a light emitting diode assembly, a backlight unit including the light emitting diode assembly, and a liquid crystal display including the same. The light emitting diode assembly includes a printed circuit board and a plurality of LED packages spaced apart from each other, Wherein the printed circuit board includes a pattern portion protruding between the base and the neighboring LED package, wherein the protruded pattern portion includes an inverted trapezoidal groove.

The inverted trapezoidal groove of the protruding pattern portion includes a horizontal plane and an inclined plane, and the inclined plane includes a first inclined plane having a first obtuse angle and a second inclined plane having a second obtuse angle, And the second inclined surface may have left and right inclined surfaces arranged in the major axis direction of the recess of the inverted trapezoidal shape.

The first obtuse angle may be smaller than the second obtuse angle.

Here, the first obtuse angle may be 100 ° and the second obtuse angle may be 140 °.

Also, a reflective material may be included in the upper portion of the inverted trapezoidal groove of the protruding pattern portion.

According to another aspect of the present invention, there is provided an LED assembly including a reflection plate, a light guide plate mounted on the reflection plate, and an LED assembly arranged along one side of the light guide plate. The LED assembly is mounted on the light guide plate and includes a plurality of optical sheets including a fluorescent material. A printed circuit board, comprising: a circuit board; and a plurality of LED packages arranged in a line and spaced apart from each other in front of the printed circuit board, wherein the printed circuit board includes a pattern portion protruded between the base and the adjacent LED package, The pattern portion provides a backlight unit including a groove having an inverted trapezoidal shape.

The inverted trapezoidal groove of the protruding pattern portion includes a horizontal plane and an inclined plane, and the inclined plane includes a first inclined plane having a first obtuse angle and a second inclined plane having a second obtuse angle, And the second inclined surface may have left and right inclined surfaces arranged in the major axis direction of the recess of the inverted trapezoidal shape.

The first obtuse angle may be smaller than the second obtuse angle.

Here, the first obtuse angle may be 100 ° and the second obtuse angle may be 140 °.

Also, a reflective material may be included in the upper portion of the inverted trapezoidal groove of the protruding pattern portion.

According to another aspect of the present invention, there is provided a liquid crystal display comprising: a liquid crystal panel for displaying an image; and a backlight unit disposed under the liquid crystal panel, wherein the backlight unit includes a reflective plate, a light guide plate, And a plurality of optical sheets including a fluorescent material. The LED assembly includes a printed circuit board and a plurality of LED packages spaced apart from each other and arranged in a line on the front surface of the printed circuit board And the printed circuit board includes a pattern portion protruding between the base and the neighboring LED package, wherein the protruding pattern portion includes a groove having an inverted trapezoidal shape.

The inverted trapezoidal groove of the protruding pattern portion includes a horizontal plane and an inclined plane, and the inclined plane includes a first inclined plane having a first obtuse angle and a second inclined plane having a second obtuse angle, And the second inclined surface may have left and right inclined surfaces arranged in the major axis direction of the recess of the inverted trapezoidal shape.

The first obtuse angle may be smaller than the second obtuse angle.

Here, the first obtuse angle may be 100 ° and the second obtuse angle may be 140 °.

In addition, a reflective material may be included on the protruding pattern portion.

The present invention has an effect that the printed circuit board of the LED assembly has a protruding pattern portion having grooves having an inverted trapezoidal shape to increase the transmission efficiency of light output from the LED package without increasing the number of LED packages, .

FIGS. 1A and 1B are diagrams illustrating the progress of light output from the LED assembly.
2A is a schematic diagram of an LED assembly according to the present invention.
2B is a view illustrating a printed circuit board according to the present invention.
FIG. 2C is a cross-sectional view referred to to explain section A and section B of FIG. 2B.
3 is a cross-sectional view schematically illustrating progress of light of the LED assembly according to the present invention.
4A is a view showing the total luminous flux incident on the light guide plate according to the change of the first oblique angle of the first inclined plane.
4B is a view showing the total luminous flux incident on the light guide plate according to the second oblique angle of the second oblique plane.
5 is an exploded perspective view of a backlight unit and a liquid crystal display device to which the LED assembly of the present invention is applied.

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

2A is a schematic diagram of an LED assembly according to the present invention.

2A, the LED assembly 100 includes a plurality of LED packages 110 and a printed circuit board 130 on which a plurality of LED packages 110 are mounted with a predetermined spacing.

  Although not shown in the drawings, an LED driving circuit (not shown) for controlling on / off of the LED assembly 100 is mounted, and an LED driving circuit (not shown) So that the overall size of the liquid crystal display device can be minimized.

The printed circuit board 130 according to the embodiment of the present invention includes a region 138 where the LED package 110 is mounted and a region 139 where the LED package is not mounted.

2B is a view illustrating a printed circuit board according to the present invention.

2B, the printed circuit board 130 of the present invention includes a base 135 and a protruding pattern portion 133. The protruded pattern portion 133 is formed on the LED package 110 of FIG. 2A, And the upper surface portion 133b of the protruded pattern portion 133 has an inverted trapezoidal groove.

More specifically, the protruding pattern portion 133 includes left and right side surfaces 133a (see FIG. 2A) disposed side by side with the side surface of the LED package (110 in FIG. 2A) between the LED packages And upper and lower surfaces 133b and 133c facing each other and the upper surface portion 133b facing the light-incoming portion of the light guide plate (20a in Fig.

An inverted trapezoidal groove is formed on the upper surface portion 133b of the protruding pattern portion 133 and the inverted trapezoidal groove includes the horizontal surface 133b3 and the inclined surfaces 133b1 and 133b2.

The inclined surfaces 133b1 and 133b2 are composed of a first inclined surface 133b1 having a first obtuse angle R1 and a second inclined surface 133b2 having a second obtuse angle R2.

FIG. 2C is a cross-sectional view referred to to explain section A and section B of FIG. 2B.

2C, the first inclined surface 133b1 shown in the section A is formed on the upper surface portion (133b in FIG. 2B) of the protruding pattern portion 133, and the upper surface The horizontal surface 133b3 and the first inclined surface 133b1 have a first obtuse angle R1.

Here, the first obtuse angle R1 preferably forms an angle of 100 DEG, but is not limited thereto.

The second inclined surface 133b2 shown in the section B is formed in the upper surface portion 133b of the protruding pattern portion 133 and is formed as a right and left inclined surface in the longitudinal direction of the groove having an inverted trapezoid, The second inclined surface 133b2 has a second obtuse angle R2.

Here, the second obtuse angle R2 is preferably an angle of 140 DEG, but is not limited thereto.

The height h of the inclined surfaces 133b1 and 133b is preferably 0.3 mm with respect to the horizontal surface 133b3, but is not limited thereto.

As described above, the first inclined face 133b1 and the second inclined face 133b2 of the inverted trapezoidal groove formed in the protruded pattern portion 133 of the printed circuit board 130 of the present invention have different angles Feature.

The reflection efficiency according to the angles of the first obtuse angle R1 and the second obtuse angle R2 will be described later.

Also, although not shown in the figure, a reflective material may be coated on the upper portion of the recess of the inverted trapezoid to increase the reflection efficiency.

3 is a cross-sectional view schematically illustrating progress of light of the LED assembly according to the present invention.

As shown in FIG. 3, an LED assembly 100 and a light guide plate 200 disposed in front of the LED assembly 100 are shown.

Here, the LED assembly 100 includes a plurality of LED packages 110 and a printed circuit board 130 on which a plurality of LED packages 110 are mounted with a predetermined spacing.

In particular, the printed circuit board 130 of the present invention comprises a base 135 and a protruding pattern portion 133. The upper surface portion 133b of the protruding pattern portion 133 (133b in FIG. 2B) .

Here, a part of the light output through the LED package 110 is incident (i) into the light guide plate 200, and a part of the light that is not incident is reflected by the light-incident surface 200a of the light guide plate 200, The light is reflected again by the printed circuit board 130 and enters the light guide plate 200 or goes straight into the light guide plate 200 to be reflected by the side reflector The light is reflected by the upper side of the printed circuit board 130 and then recycled into the light guide plate 200 through the recycling process.

The light reflected from the light guide plate 200 is reflected by the protruding pattern portion 133 of the printed circuit board 130 of the present invention by the light reflected from the light guide plate 200 collides with the side surface of the LED package 110, Can be prevented from being lost.

In addition, the distance d between the printed circuit board 130 and the light-incident portion 200a of the light guide plate 200 can be reduced by the protruding pattern portion 133, thereby minimizing loss in the light transmission process.

Particularly, by forming an inverted trapezoidal groove in the upper part of the protruded pattern part 133, light reflected from the light guide plate 200 can be efficiently reflected again, thereby improving light transmission efficiency by a recycling process .

As a result, the loss of light can be minimized and the light transmission efficiency can be improved by the printed circuit board 130 applied to the LED assembly 100 of the present invention, thereby increasing the brightness of the backlight unit and the liquid crystal display device.

4A is a diagram showing the total luminous flux incident on the light guide plate according to the change of the first oblique angle of the first inclined plane

4B is a view showing the total luminous flux incident on the light guide plate according to the change of the second oblique angle of the second inclined plane

As shown in Figs. 4A and 4B, the inverted trapezoidal grooves formed in the upper surface portion 133b of the protruded pattern portion 133 include a horizontal surface 133b3 and inclined surfaces 133b1 and 2b, The first and second inclined surfaces 133b1 and 133b2 include a first inclined surface 133b1 having a first obtuse angle R1 and a second inclined surface 133b1 having a second obtuse angle R2.

The first inclined surface 133b1 is a vertically inclined surface 133b1 formed in a minor axis direction of an inverted trapezoidal groove formed in the upper surface portion 133b of the protruding pattern portion 133 and the second inclined surface 133b2 is protruded Left and right slopes 133b2 formed in the major axis direction of an inverted trapezoidal groove formed in the upper surface portion 133b of the pattern portion 133. [

The height h of the inclined surfaces 133b1 and 133b is preferably 0.3 mm with respect to the horizontal surface 133b3, but is not limited thereto.

3) formed on the upper surface portion (133b in FIG. 2B) of the protruded pattern portion 133 when the total luminous flux entering into the light guide plate (200 in FIG. 3) (200 in Fig. 3) according to the change of the first obtuse angle R1 of the first oblique surface 133b1 of the groove having the inverted trapezoidal shape and the second obtuse angle R2 of the second oblique surface 133b2 Let's examine the total luminous flux in detail.

As shown in FIG. 4A, when the first oblique angle R1 of the first oblique surface 133b1 is 100 degrees, the total luminous flux entering the light guide plate 200 (FIG. 3) is 102.62.

When the first oblique angle R1 of the first inclined plane 133b1 is 110 °, the total luminous flux entering the light guide plate 200 (FIG. 3) is 102.59.

 When the first oblique angle R1 of the first inclined plane 133b1 is 120 degrees, the total luminous flux entering the light guide plate 200 (FIG. 3) is 102.61.

When the first oblique angle R1 of the first inclined plane 133b1 is 130 °, the total luminous flux entering the light guide plate 200 (FIG. 3) is 102.57.

When the first oblique angle R1 of the first inclined surface 133b1 is 140 °, the total luminous flux entering the light guide plate 200 (FIG. 3) is 102.45.

When the first oblique angle R1 of the first inclined plane 133b1 is 150 °, the total luminous flux entering the light guide plate 200 (FIG. 3) is 102.33.

 When the first oblique angle R1 of the first inclined plane 133b1 is 160 °, the total luminous flux entering into the light guide plate 200 (FIG. 3) is 102.10.

As shown in FIG. 4B, when the second obtuse angle R2 of the second oblique surface 133b2 is 100, the total luminous flux entering into the light guide plate 200 (FIG. 3) is 101.96.

 When the second oblique angle R2 of the second oblique surface 133b2 is 110 degrees, the total luminous flux entering into the light guide plate 200 (FIG. 3) is 102.01.

 When the second oblique angle R2 of the second oblique surface 133b2 is 120 degrees, the total luminous flux entering into the light guide plate 200 (FIG. 3) is 102.24.

 When the second oblique angle R2 of the second oblique surface 133b2 is 130 °, the total luminous flux entering into the light guide plate 200 (FIG. 3) is 102.50.

 When the second oblique angle R2 of the second oblique surface 133b2 is 140 °, the total luminous flux entering the light guide plate 200 (FIG. 3) is 102.58.

 When the second oblique angle R2 of the second oblique surface 133b2 is 150 °, the total luminous flux incident into the light guide plate 200 (FIG. 3) is 102.49.

 When the second oblique angle R2 of the second oblique surface 133b2 is 160 °, the total luminous flux entering into the light guide plate 200 (FIG. 3) is 102.39.

3). When the first oblique angle R1 of the first oblique surface 133b1 is 100 ° and the second oblique angle R2b of the second oblique surface 133b2 is 140 °, And the total luminous flux incident on the light-emitting device is the maximum value.

Therefore, the total luminous flux incident on the light guide plate 200 (shown in FIG. 3) changes in accordance with the angles R1 and R2 on both the first inclined plane 133b1 and the second inclined plane 133b2.

Especially, the increase and decrease of the total luminous flux incident on the inside of the light guide plate due to the changes of the angles R1 and R2 between the first inclined plane 133b1 and the second inclined plane 133b2 are not the same.

Therefore, when forming the inverted trapezoidal grooves in the protruded pattern portion 133 of the printed circuit board 130 (FIG. 3), the first obtuse angle R1 of the first oblique surface 133b1 is formed at 100 ° When the second oblique angle R2 of the second inclined plane 133b2 is 140 degrees, the total luminous flux entering into the light guide plate 200 (FIG. 3) is 105.2, increasing the number of the LED package 110 The total luminous flux entering into the light guide plate 200 (FIG. 3) through the protruded pattern portion 133 of the printed circuit board can be increased to improve the brightness.

The first obtuse angle R1 and the second obtuse angle R2 of the first oblique surface 133b1 and the second oblique surface 133b2 are the same as the number of the LED package 110 in Fig. 3, the short axis of the protruding pattern portion 133, The size and height of the major axis, the distance from the light guide plate 200 (FIG. 3), and the like.

5 is an exploded perspective view of a backlight unit and a liquid crystal display device to which the LED assembly of the present invention is applied.

As shown, the liquid crystal display device 299 includes a liquid crystal panel 210, a backlight unit BU, a support main 230, a cover bottom 250, and a top cover 240.

First, the liquid crystal panel 210 plays a key role in image display and includes first and second substrates 212 and 214 which are bonded to each other with a liquid crystal layer interposed therebetween.

At this time, a plurality of gate lines and data lines intersect with each other on the inner surface of the first substrate 212, which is usually referred to as a lower substrate or an array substrate, although not clearly shown in the figure, And a thin film transistor (TFT) is provided at each of the intersections, and is connected in a one-to-one correspondence with the transparent pixel electrodes formed in the respective pixels.

On the inner surface of the second substrate 214 called an upper substrate or a color filter substrate, a color filter of red (R), green (G), and blue (B) And a black matrix for covering non-display elements such as a gate line, a data line, and a thin film transistor. In addition, a transparent common electrode covering these elements is provided.

A gate and a data printed circuit board 217 are connected to each other via a connection member 216 such as a flexible printed circuit board along at least one edge of the liquid crystal panel 210 to support the side of the support main 230, (250).

Although not clearly shown in the drawing, an alignment film for determining the initial alignment direction of the liquid crystal is interposed in the boundary between the two substrates 212 and 214 of the liquid crystal panel 210 and the liquid crystal layer, and a liquid crystal layer A seal pattern is formed along the edges of both the substrates 212 and 214 to prevent leakage of the substrate.

At this time, polarizers (not shown) are attached to the outer surfaces of the first and second substrates 212 and 214, respectively.

A backlight unit BU for supplying light is provided on the back surface of the liquid crystal panel 210 so that a difference in transmittance represented by the liquid crystal panel 210 is externally manifested.

The backlight unit BU includes an LED assembly 100 arranged along the longitudinal direction of at least one edge of the support main body 230, a white or silver reflective plate 225, and a light guide plate 200 And an optical sheet 221 interposed therebetween.

The LED assembly 100 described above is a light source of the backlight unit BU and is disposed at one side of the light guide plate 200 so as to face the light incident side of the light guide plate 200. The LED assembly 100 includes a plurality of LED packages 110 And a printed circuit board 130 on which a plurality of LED packages 110 are mounted with a predetermined spacing therebetween.

Here, the LED assembly 100 according to the embodiment of the present invention includes an area where the LED package 110 is mounted (138 in FIG. 2B) and an area where the LED package 110 is not mounted (139 in FIG. 2B) , And a protruded pattern portion (133 in FIG. 2B) in an area where the LED package 110 is not mounted.

2B). The printed circuit board 130 of the present invention comprises a base (135 in FIG. 2B) and a projected pattern portion (133 in FIG. 2B) (138 in FIG. 2B), and the upper surface portion (133b in FIG. 2B) of the projected pattern portion (133 in FIG. 2B) has an inverted trapezoidal groove.

Referring to FIG. 2, the protruding pattern portions 133 are formed on the left and right side surfaces 133a and 133b of the LED package 110, which are disposed in parallel to the side surface of the LED package 110, And other upper and lower side surfaces 133c and an upper surface portion 133b facing the light entering portion (200a in Fig. 3) of the light guide plate 200.

An inverted trapezoidal groove is formed in the upper surface portion 133b of the protruded pattern portion 133. The inverted trapezoidal groove includes a horizontal surface 133b3 and inclined surfaces 133b1 and 2b and inclined surfaces 133b1 and 133b2 Has a first inclined surface 133b1 having a first obtuse angle R1 and a second inclined surface 133b2 having a second obtuse angle R2.

The first inclined surface 133b1 is an inclined surface 133b1 formed in a minor axis direction of an inverted trapezoidal groove formed in the upper surface portion 133b of the protruded pattern portion 133. The first inclined surface 133b1 and the first inclined surface 133b1 And has a first obtuse angle R1.

Here, the first obtuse angle R1 preferably forms an angle of 100 DEG, but is not limited thereto.

On the other hand, the second inclined surface 133b2 is an inclined surface 133b2 formed in the longitudinal axis direction of an inverted trapezoidal groove formed in the upper surface portion 133b of the protruded pattern portion 133, and the horizontal surface 133b3 and the second inclined surface 133b2 And has a second obtuse angle R2.

Here, the second obtuse angle R2 is preferably an angle of 140 DEG, but is not limited thereto.

The height h of the inclined surfaces 133b1 and 133b is preferably 0.3 mm with respect to the horizontal surface 133b3, but is not limited thereto.

As described above, the first inclined plane 133b1 and the second inclined plane 133b2 of the inverted trapezoidal grooves formed in the protruding pattern unit 133 of the printed circuit board 130 of the present invention have different angles.

Also, although not shown in the figure, a reflective material may be coated on the upper portion of the recess of the inverted trapezoid to increase the reflection efficiency.

The light guide plate 200 on which the light emitted from the plurality of LED packages 110 is incident is formed such that the light incident from the LED package 110 travels in the light guide plate 200 by total reflection several times, Thereby providing a planar light source to the liquid crystal panel 210.

In the present invention, a part of the light output through the LED package 110 is incident into the light guide plate 200 (① in FIG. 3), and a part of the light that is not incident enters the light guide plate 200 The light is reflected from the light surface and is reflected by the printed circuit board 130 again and enters the light guide plate 200 again (② in FIG. 3) or goes straight into the light guide plate 200 and is reflected by a side reflector (not shown) And is then recycled to the outside of the light guide plate 200 by being reflected by the upper side of the printed circuit board 130 out of the light guide plate 200 again (③ in FIG. 3).

The light reflected from the light guide plate 200 is reflected by the protruding pattern portion 133 of the printed circuit board 130 of the present invention by the light reflected from the light guide plate 200 collides with the side surface of the LED package 110, And the distance between the printed circuit board 130 and the light entering portion of the light guide plate 200 (d in FIG. 3) is reduced by the projected pattern portion 133, And an inverted trapezoidal groove is formed on the protruded pattern portion 133 to efficiently reflect light reflected from the light guide plate 200 to improve the light transmission efficiency by the recycling process So that the brightness of the backlight unit BU can be improved.

The plurality of optical sheets 221 on the light guide plate 200 include a diffusion sheet and at least one light collecting sheet and diffuse or condense the light passing through the light guide plate 200, Allow a single-sided light source to enter.

The liquid crystal panel 210 and the backlight unit BU are modularized through the top cover 240, the support main 230 and the cover bottom 250. The top cover 240 covers the top edge of the liquid crystal panel 210, So as to cover the side surface.

The top cover 240 has a rectangular frame shape bent in a "? &Quot; shape so as to cover the top and side edges of the liquid crystal panel 210, As shown in Fig.

In addition, the cover bottoms 250, on which the liquid crystal panel 210 and the backlight unit BU are mounted and which are the basis for assembling the entire apparatus of the liquid crystal display apparatus, are composed of a horizontal plane and an edge portion whose edges are vertically bent.

The support main 230 having a square shape and having one opened edge, which is placed on the cover bottom 250 and covers the edges of the liquid crystal panel 210 and the backlight unit BU, Is combined with the bottoms 250.

In this case, the top cover 240 may be referred to as a case top or a top case, and the support main 230 may be referred to as a guide panel or a main support or a mold frame. The cover bottom 250 may be referred to as a bottom cover or a bottom cover I will.

As described above, the LED assembly 100, the backlight unit BU, and the liquid crystal display device 299 of the present invention form a patterned portion 133 protruding from the printed circuit board 130 of the LED assembly 100 And the recycling process, thereby improving the brightness of the LED assembly 100, the backlight unit BU, and the liquid crystal display device 299

The embodiments of the present invention as described above are merely illustrative, and those skilled in the art can make modifications without departing from the gist of the present invention. Accordingly, the protection scope of the present invention includes modifications of the present invention within the scope of the appended claims and equivalents thereof.

100: LED assembly 110: LED package
130: printed circuit board 138: area where the LED package is mounted
139: Area where the LED package is not mounted

Claims (15)

A printed circuit board;
And a plurality of LED packages arranged in a line and spaced apart from each other on an entire surface of the printed circuit board,
Wherein the printed circuit board includes a pattern portion protruding between the base and the neighboring LED package, wherein the protruding pattern portion includes an inverted trapezoidal groove.
The method according to claim 1,
Wherein the inverted trapezoidal groove of the protruded pattern portion includes a horizontal plane and an inclined plane,
Wherein the inclined surface includes a first inclined surface having a first obtuse angle and a second inclined surface having a second obtuse angle,
Wherein the first inclined surface is a vertically inclined surface disposed in a minor axis direction of the recess of the inverted trapezoidal shape and the second inclined surface is a right and left inclined surface disposed in a major axis direction of the recess of the inverted trapezoidal shape.
3. The method of claim 2,
Wherein the first obtuse angle is smaller than the second obtuse angle.
The method of claim 3,
Wherein the first obtuse angle is 100 ° and the second obtuse angle is 140 °
LED assembly.
5. The method of claim 4,
And the reflective material is contained in the upper portion of the inverted trapezoidal groove of the projected pattern portion
LED assembly.
A reflector;
A light guide plate mounted on the reflection plate;
An LED assembly arranged along one side of the light guide plate;
A plurality of optical sheets, which are seated on the light guide plate and include a fluorescent material,
/ RTI >
Wherein the LED assembly includes a printed circuit board and a plurality of LED packages arranged in a line and spaced apart from each other on the entire surface of the printed circuit board,
Wherein the printed circuit board includes a pattern portion protruded between the base and the neighboring LED package, wherein the protruding pattern portion includes an inverted trapezoidal groove
Backlight unit.
The method according to claim 6,
Wherein the inverted trapezoidal groove of the protruded pattern portion includes a horizontal plane and an inclined plane,
Wherein the inclined surface includes a first inclined surface having a first obtuse angle and a second inclined surface having a second obtuse angle,
Wherein the first inclined surface is a vertically inclined surface arranged in a minor axis direction of the recess of the inverted trapezoidal shape and the second inclined surface is a right and left inclined surface arranged in a major axis direction of the recess of the inverted trapezoidal shape.
8. The method of claim 7,
Wherein the first obtuse angle is smaller than the second obtuse angle.
9. The method of claim 8,
Wherein the first obtuse angle is 100 ° and the second obtuse angle is 140 °
Backlight unit.
10. The method of claim 9,
And the reflective material is contained in the upper portion of the inverted trapezoidal groove of the projected pattern portion
Backlight unit.
A liquid crystal panel for displaying an image;
And a backlight unit
/ RTI >
The backlight unit
A reflector,
A light guide plate that is seated on the reflection plate,
An LED assembly arranged along one side of the light guide plate,
A plurality of optical sheets seated on the light guide plate and including a fluorescent material,
The LED assembly
A printed circuit board,
And a plurality of LED packages arranged in a line and spaced apart from each other on an entire surface of the printed circuit board,
Wherein the printed circuit board includes a pattern portion protruded between the base and the neighboring LED package, wherein the protruding pattern portion includes an inverted trapezoidal groove
Liquid crystal display device.
12. The method of claim 11,
Wherein the inverted trapezoidal groove of the protruded pattern portion includes a horizontal plane and an inclined plane,
Wherein the inclined surface includes a first inclined surface having a first obtuse angle and a second inclined surface having a second obtuse angle,
Wherein the first inclined surface is a vertically inclined surface arranged in the minor axis direction of the recess of the inverted trapezoidal shape and the second inclined surface is a right and left inclined surface arranged in the major axis direction of the recess of the inverted trapezoidal shape.
13. The method of claim 12,
Wherein the first obtuse angle is smaller than the second obtuse angle.
14. The method of claim 13,
Wherein the first obtuse angle is 100 deg. And the second obtuse angle is 140 deg.
15. The method of claim 14,
And a reflective material is disposed on the protruded pattern portion.

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