KR102139675B1 - Backlight unit and liquid crystal display device having the same - Google Patents

Abstract

The present invention relates to a backlight unit and a liquid crystal display device including the same.
The liquid crystal display device according to the present invention includes a liquid crystal panel and a backlight unit including a light source disposed under the liquid crystal panel and a reflector reflecting light emitted from the light source and directed toward the rear side toward the liquid crystal panel, and the reflector Includes a first part having a plurality of LED through holes for exposing each of the plurality of LEDs and a second part connected to have an obtuse angle along the edge of the first part, and the second part is greater than the reflector. It is characterized by having a first light pattern having a high reflectance.
Through this, a uniform light distribution can be achieved on the display area of the liquid crystal display device.

Description

Backlight unit and liquid crystal display device including the same{BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THE SAME}

The present invention relates to a backlight unit having a uniform light distribution and a liquid crystal display device including the same.

The liquid crystal display device (LCD), which is actively used in TVs, monitors, etc. because it is advantageous for moving picture display and has a large contrast ratio, is an optical anisotropy and polarization of liquid crystal. It shows the principle of image implementation.

This liquid crystal display device is a liquid crystal panel (liquid crystal panel) interposed between the two substrates (substrate) interposed between the liquid crystal panel (liquid crystal panel) as an essential component, the electric field in the liquid crystal panel to change the arrangement direction of the liquid crystal molecules to realize the difference in transmittance do.

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

Here, as a light source of the backlight unit, a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp: CCFL) or an external electrode fluorescent lamp (External Electrode Fluorescent Lamp: EEFL) has been used a lot of fluorescent lamps, but recently, the thinning of the liquid crystal display device, Light emitting diodes (LEDs), which have advantages in power consumption, weight, and luminance, are replacing fluorescent lamps in accordance with the trend of weight reduction.

According to the position of the light source, the backlight unit can be classified into a direct type and an edge type. In the direct type backlight unit, the light emitted from the light source is directly disposed by placing the light source under the liquid crystal panel. This is a method of supplying to a liquid crystal panel, and the backlight unit of the side type method indirectly directs light emitted from the light source by using refraction and reflection in the light guide plate by arranging the light guide plate under the liquid crystal panel and placing the light source on at least one side of the light guide plate. It is a method of supplying to a liquid crystal panel.

Here, in the direct-type backlight unit, a reflector that is emitted from the LED and reflects light directed toward the rear direction toward the front side is positioned on the top of the LED printed circuit board.

At this time, the reflective plate is formed so that its side surface has an obtuse angle larger than a right angle toward the outside direction, thereby increasing the reflection efficiency.

However, there is a problem that the edge portion of the display area of the liquid crystal display device is darker than the center.

If this is described in more detail, there is a problem in that the light distribution between the central area and the edge area of the display area is uneven and the overall quality of the liquid crystal display device is deteriorated.

An object of the present invention for solving the above problems is to provide a backlight unit and a liquid crystal display device including the same to enable uniform light distribution over the entire display area of the liquid crystal display device.

A liquid crystal display device according to the present invention for achieving the above object is a liquid crystal panel; And a backlight unit including a plurality of LEDs and an LED assembly disposed under the liquid crystal panel and a reflector that reflects light emitted from each of the plurality of LEDs toward the rear side toward the liquid crystal panel, and the reflector. The first portion and the second portion connected to have an obtuse angle along the edge of the first portion, the inner surface of the second portion is characterized in that the first light pattern having a higher reflectivity than the reflector is provided Is done.

Each of the plurality of LEDs is characterized by being a reflective LED that directs some light toward the liquid crystal panel and some light toward the rear direction.

The first portion is provided with a plurality of LED through-holes for exposing each of the plurality of LEDs, the inner surface of the first portion is provided with a second light pattern formed around the plurality of LED through-holes do.

The first light pattern is formed so that the density of the pattern increases or decreases as the distance from the plurality of LEDs increases depending on the positions of the plurality of LED through holes formed at the edges of the first portion of the plurality of LED through holes. Is done.

The second light pattern is characterized in that the reflectance is lower than the reflector.

Meanwhile, a backlight unit according to a preferred embodiment of the present invention includes an LED assembly including a plurality of LEDs; And a second portion connected to have an obtuse angle along an edge of the first portion and the first portion, and includes a reflector that reflects light emitted from each of the plurality of LEDs and facing toward the rear direction toward the front direction. And, the inner surface of the second portion is characterized in that the first light pattern having a higher reflectance than the reflecting plate is provided.

Each of the plurality of LEDs is characterized by being a reflective LED that directs some light toward the liquid crystal panel and some light toward the rear direction.

The first portion is provided with a plurality of LED through-holes for exposing each of the plurality of LEDs, the inner surface of the first portion is provided with a second light pattern formed around the plurality of LED through-holes do.

The first light pattern is formed so that the density of the pattern increases or decreases as the distance from the plurality of LEDs increases depending on the positions of the plurality of LED through holes formed at the edges of the first portion of the plurality of LED through holes. Is done.

The second light pattern is characterized in that the reflectance is lower than the reflector.

As described above, according to the backlight unit and the liquid crystal display device including the same according to the present invention, an edge pattern on the display area can be increased by providing a light pattern capable of increasing reflectance on a side surface of the reflector.

In addition, a light pattern capable of partially absorbing light is further provided in the light source region where the light source is positioned on the reflector, thereby preventing luminance uniformity between the center region and the border region on the display region.

Through this, a liquid crystal display device having a uniform light distribution in all areas of the display area can be realized.

1 is an exploded perspective view showing a liquid crystal display device according to a preferred embodiment of the present invention.
2 is a cross-sectional view showing a liquid crystal display device according to a preferred embodiment of the present invention.
3 is a front view showing a reflector according to a preferred embodiment of the present invention.
4 is a view for explaining a light path in the backlight unit according to a preferred embodiment of the present invention.
5 is a front view showing a reflector according to another embodiment of the present invention.

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

1 is an exploded perspective view showing a liquid crystal display device according to a preferred embodiment of the present invention, Figure 2 is a cross-sectional view showing a liquid crystal display device according to a preferred embodiment of the present invention, Figure 3 is a preferred embodiment of the present invention It is a front view showing a reflector according to.

As illustrated, the liquid crystal display device 100 according to the present invention includes a liquid crystal panel 110, a backlight unit 120, and a support main 130 for modularizing the liquid crystal panel 110 and the backlight unit 120. And a top cover 140 and a cover bottom 150.

The liquid crystal panel 110 is a part that plays a key role in image display, and is composed of first and second substrates 112 and 114 bonded to each other with a liquid crystal layer interposed therebetween.

Here, although not shown in the drawings, a plurality of gate lines and data lines are intersected and pixels are defined on the inner surface of the first substrate 112 commonly referred to as a lower substrate or an array substrate under the premise of an active matrix method, and each intersection point A thin film transistor (TFT) is provided to be connected one-to-one to a transparent pixel electrode formed in each pixel.

In addition, as an example corresponding to each pixel on the inner surface of the second substrate 114 called an upper substrate or a color substrate, color filters of red (R), green (G), and blue (B) colors, and these A black matrix is provided to cover non-display elements such as a gate line, a data line, and a thin film transistor.

In addition, a transparent common electrode corresponding to the pixel electrode may be provided on the first substrate 112 or the second substrate 114.

Further, first and second polarizing plates 119a and 119b selectively transmitting only specific light are attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

In addition, the driving printed circuit board 117 is connected and modularized through a connecting member 116 such as a flexible circuit board or a tape carrier package (TCP) along at least one edge of the liquid crystal panel 110. In the process, the side of the support main 130 or the back surface of the cover bottom 150 can be properly flipped to close.

Accordingly, the liquid crystal panel 110 of the above-described structure, when the thin film transistor selected for each gate line is turned on by the on or off signal of the gate driving circuit transmitted through the driving printed circuit board 117, the data driving circuit The signal voltage is transmitted to the corresponding pixel electrode through the data line, and accordingly, the arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode, thereby indicating a difference in transmittance.

On the rear surface of the liquid crystal panel 110, a backlight unit 120 for supplying light so as to display a difference in transmittance as an image is provided.

The backlight unit 120 includes a plurality of LED assemblies 129, a reflector plate 127 positioned on the plurality of LED assemblies 129, a diffuser plate 124 positioned above the reflector plate 127, and a diffuser plate It includes an optical sheet 121 located on the top of (124).

Each of the plurality of LED assemblies 129 is made by being mounted on the LED Printed Circuit Board (PCB) 129b with a plurality of LEDs 129a spaced apart at regular intervals.

Each of the plurality of LEDs 129a includes an LED lens for reflecting light generated from an LED chip that emits light more broadly.

At this time, the LED lens refracts and totally reflects the light generated from the LED chip so that some light is directed toward the liquid crystal panel 110 and some light is directed toward the cover bottom 150.

The LED 129a to which the LED lens is applied is referred to as a reflective LED, and because the reflective LED has a wider light directing angle than a refractive LED that directs all of the light toward the liquid crystal panel 110, a number of LEDs ( 129a) Increases the separation distance and allows the use of fewer LEDs 129a.

In addition, it is possible to use a smaller number of LEDs 129a by widening the spacing between the LED assemblies 129 as well as the spacing between the LEDs 129a.

In this case, the plurality of LED assemblies 129 may be arranged side by side along the long direction of the cover bottom 150, or may be arranged side by side in a direction perpendicular to the long direction.

Meanwhile, the LED printed circuit board 129b in which a plurality of LEDs 129a are mounted may correspond to a metal core printed circuit board having a heat dissipation function, and the rear surface of the metal core printed circuit board. A heat sink (not shown) is provided to allow heat generated from each of the plurality of LEDs 129a to be discharged to the outside.

The upper portion of the LED printed circuit board 129b is positioned with a reflector 127 reflecting some of the light emitted from each of the plurality of LEDs 129a toward the cover bottom 150 toward the liquid crystal panel 110.

The reflector 127 includes a plurality of LED through holes 125a through which each of the plurality of LEDs 129a may pass, corresponding to each of the plurality of LEDs 129a included in the plurality of LED assemblies 129.

Accordingly, the reflective plate 127 is seated on the top of the LED printed circuit board 129b by allowing each of the plurality of LEDs 129a to pass through and be exposed through the plurality of LED through holes 125a.

The reflector 127 is formed of a white or silver plate, and includes a plurality of LED through holes 125a, and the first portion 125 and the first portion 125 where the LED 129a as a light source is disposed. It is composed of a second portion 126 connected obliquely in the outward direction.

At this time, the first portion 125 is a light source region, and the second portion 126 is a light source member region.

The second portion 126 is formed to have an obtuse angle along the edge of the first portion 125 so that light emitted from the plurality of LEDs 129a can be refracted in the direction toward the liquid crystal panel 110.

The second portion 126 includes a long side portion 126a facing each other and a short side portion 126b connecting them.

The first light pattern 128 is formed on the inner surface of the second part 126, and the first light pattern 128 is emitted from the second part 126 where the LED 129a, which is a light source, is not located. It is a pattern for increasing light luminance.

The first optical pattern 128 for this purpose may be an embossed pattern formed by applying a printing method or a tape through a bright series of ink such as white and silver, but is not limited thereto, and may be, for example, an engraved pattern formed through an injection method. have.

The first light pattern 128 may be formed on the entire inner surface of the second portion 126, but is not limited thereto and may be formed only on the long side portion 126a or the short side portion 126b of the second portion 126. It might be.

The first light pattern 128, for example, may be formed in a rectangular pattern (rectangle pattern), the distance between the pattern as the distance away from the LED (129a) as the light source can be formed so that the width of the pattern becomes narrower .

Meanwhile, the density of the first optical pattern 128 may be changed according to the positions of the plurality of LED through holes 125a formed along the edge of the first portion 125.

For example, a plurality of LED through holes 125a are formed close to the boundary regions of the first portion 125 and the second portion 126 so that the plurality of LEDs 129a are adjacent to the second portion 126. In this case, even in the second portion 126, the first light pattern 128 may be formed only on the outer edge of the second portion 126 away from the plurality of LEDs 129a. Alternatively, a high-reflection pattern having a high reflectivity is formed on the outer edge of the second portion 126 away from the plurality of LEDs 129a, and a high-reflectance is formed on the edge of the second portion 126 close to the plurality of LEDs 129a. It is possible to form a low reflection pattern having a lower low reflection rate.

Meanwhile, a second light pattern 125b may be formed on the inner surface of the first portion 125.

The second light pattern 125b is a pattern for equally aligning the light distribution between the first part 125 and the second part 126 in which a plurality of LEDs 129a, which are light sources, are located. 125a) may be formed around each. At this time, the second light pattern 125b may be omitted depending on the distance between the plurality of LED through holes 125a, the type of LED, and the light directing angle range of the LED.

The second optical pattern 125b corresponds to the first optical pattern 128 formed along the long side portion 126a of the second portion 126 and is open along the long direction, for example, a concave round having a crescent shape. It can have a shape.

The second optical pattern 125b may be an embossed pattern formed by applying a printing method or a tape through a black or dark gray-based ink, but is not limited thereto and may be an engraved pattern formed through an injection method.

The shape of the second optical pattern 125b may be changed according to the separation distance between the plurality of LED through holes 125a.

The first light pattern 128 described above has a higher reflectance than the reflector 127 and the second light pattern 125b has a lower reflectance than the reflector. Accordingly, the first light pattern 128 has a higher reflectance than the second light pattern 125b, and the second light pattern 125b has a higher absorption rate than the first light pattern 128.

A diffuser plate 124 for diffusing light is positioned above the reflective plate 127 having the above-described structure, with an optical gap therebetween.

At this time, the optical gap is a gap required to diffuse light emitted from each of the plurality of LEDs 129a to form light uniformity.

In the present invention, as a reflective LED having a wide light directing angle is applied, there is an advantage of reducing an optical gap between the reflector 127 and the diffuser plate 124. Through this, it is possible to reduce the overall thickness of the liquid crystal display device 100.

An optical sheet 121 is positioned above the diffusion plate 124.

Here, the optical sheet 121 may include at least a diffusion sheet, at least one condensing sheet, and a protective sheet, and various functional sheets such as a dual brightness enhancement film called DBEF (dual brightness enhancement film) capable of increasing luminance. It can be included to increase the luminance of the light emitted from the plurality of LEDs (129a).

Accordingly, light emitted from each of the plurality of LEDs 129a is incident on the liquid crystal panel 110 by the reflector 127, the diffuser plate 124, and the optical sheet 121, thereby using the liquid crystal panel 110 ) Displays a high-brightness image to the outside.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the top cover 140, the support main 130, and the cover bottom 150.

Here, the top cover 140 is a rectangular frame shape in which the cross section is bent in a shape to cover the top and side edges of the liquid crystal panel 110, and is implemented in the liquid crystal panel 110 by opening the front surface of the top cover 140. It is configured to display the image.

In addition, the cover bottom 150 on which the liquid crystal panel 110 and the backlight unit 120 are settled and which is the basis for assembling the entire structure of the liquid crystal display device 100 is a square plate-like shape of the cover bottom 150. It may include a pair of bar-shaped side support (not shown) coupled to the edge of both ends facing each other.

In addition, the other two edges of the cover bottom 150, except for the side support (not shown), are bent upward at an angle so as to have the same height as these, thereby forming a predetermined space in which the backlight unit 120 can be seated. .

It is mounted on the cover bottom 150 and the support main 130 having a rectangular frame shape that surrounds the edges of the liquid crystal panel 110 and the backlight unit 120 is modularized by being combined with the top cover 140 and the cover bottom 150. Is made.

Meanwhile, the top cover 140 may be referred to as a case top or top case, the support main 130 may be referred to as a guide panel or main support, a mold frame, and the cover bottom 150 may also be referred to as a bottom cover.

Hereinafter, a light traveling path in the backlight unit to which the reflector according to the present invention is applied will be described with reference to the drawings.

FIG. 4 is a view for explaining an optical progress path in a backlight unit according to a preferred embodiment of the present invention, and refer to FIGS. 1 to 3.

The light emitted from each of the plurality of LEDs 129a is directly reflected by the first light L11 emitted toward the liquid crystal panel (110 of FIG. 2) and the LED lens, and the second light directed to the reflector 127 by refraction. (L21).

Accordingly, some light L12 of the first light L11 emitted from each of the plurality of LEDs 129a passes through the diffuser plate 124 and the optical sheet 121 and is provided to the liquid crystal panel (110 of FIG. 2 ). A part of the light L13 is refracted (reflected) by the diffuser plate 124 or the optical sheet 121 toward the reflector 127 and then toward the liquid crystal panel (110 in FIG. 2) by the reflector 127 Will be reflected again.

In addition, the second light L21 emitted from each of the plurality of LEDs 129a is reflected in the direction toward the liquid crystal panel (110 of FIG. 2) by the reflector 127, which is formed around each of the plurality of LEDs 129a. After light is partially absorbed by the second light pattern (125b in FIG. 3), the remaining light L22 is reflected in the direction toward the liquid crystal panel (110 in FIG. 2).

At this time, some of the light (L22) toward the liquid crystal panel (110 in FIG. 2) (L23) passes through the diffusion plate 124 and the optical sheet 121 is provided to the liquid crystal panel (110 in FIG. 2), some light The L24 is refracted (reflected) by the diffuser plate 124 or the optical sheet 121 to face the reflector 127.

On the other hand, the light emitted from the LED 129a adjacent to the second portion 126 of the reflector 127 among the plurality of LEDs 129a is also emitted from the first light L11 toward the liquid crystal panel (110 of FIG. 2). Refracted by the LED lens is divided into a second light (L21) toward the reflector 127, the second light (L21) is a third light (L21) and the reflector toward the first portion 125 of the reflector (127) It can be divided into a fourth light (L25) directed to the second portion 126 of (127).

Accordingly, some of the light L12 of the first light L11 emitted from the LED 129a positioned at the edge of the first portion 125 passes through the diffuser plate 124 and the optical sheet 121, and thus the liquid crystal panel. (110 of FIG. 2), and some light L13 is refracted (reflected) by the diffuser plate 124 or the optical sheet 121, and then is formed on the second portion 126 of the reflector 127 Re-reflected through one light pattern 128 is emitted (L14).

In addition, the third light L21 emitted from the LED 129a positioned at the edge of the first part 125 is applied to the second light pattern (125b of FIG. 3) formed in the first part 125 of the reflector 127. After the light is partially absorbed, the remaining light L26 is reflected by the first light pattern 128 and is emitted L27 in a direction toward the liquid crystal panel (110 of FIG. 2 ).

In addition, the fourth light L25 emitted from the LED 129a positioned at the edge of the first portion 125 is reflected by the first light pattern 128 having a higher reflectivity than the reflector 127, and thus the liquid crystal panel ( It exits (L28) in the direction toward 110) of FIG.

Since the above-described first light pattern 128 has a higher reflectance than the reflector 127, the luminance of the border area may be increased through the light L14 and L28 emitted by the first light pattern 128. .

In addition, the second light pattern 125b has a lower reflectance than the reflector 127 and absorbs some light, and thus serves to prevent a luminance non-uniformity that may occur in the central region within the display area.

In more detail, an overlapping region in which light overlaps each other exists between the adjacent LEDs 129a. When the light luminance in the overlapping region is high, a luminance non-uniformity may occur on the screen. In the present invention, the luminance in the overlapping region can be adjusted by providing a second light pattern 125b so that some light is absorbed. There is an advantage.

That is, the first light pattern 128 is for uniformizing the light distribution between the central area where the LED 129a is located on the display area and the border area where the LED 129a is not located, and the second light pattern 125b Is for uniformizing the light distribution in the central area on the display area.

5 is a front view showing a reflector according to another embodiment of the present invention. Here, since the structure except the shapes of the first light pattern and the second light pattern is the same as the reflector of FIG. 3, detailed description thereof will be omitted.

As shown in FIG. 5, the reflector 227 includes a first portion 225 and a first portion 225 including a plurality of LED through holes 225a corresponding to each of a plurality of LEDs (129a in FIG. 1 ). It consists of a second portion 226 connected to have an obtuse angle along the edge of ).

Here, a first light pattern 228 may be formed on the front surface of the second part 226, and a second light pattern 225b may be formed on the first part 225, and the second light pattern 225b may be formed. It can be omitted.

The first light pattern 228 is a pattern having a higher reflectivity than the reflector 227 and may be formed in a circular pattern as shown in the drawing.

The first light pattern 228 is not limited thereto, and the first light pattern 228 is an elliptical pattern, a polygon pattern, a hologram pattern, a trapezoid pattern, a rhombus pattern, It can be configured in various ways, such as a hexagon pattern (hexagone pattern).

The position and density of the first light pattern 228 may be adjusted according to the positions of the plurality of LED through holes 225a formed along the edge of the first portion 225.

To explain this further, the distance from the LED 229a, which is a light source, may be formed to lower the density of the pattern. For example, as the distance from the LED 229a as a light source becomes more uniform, the distance between the patterns can be formed to be smaller, or as the distance from the LED 229a as a light source becomes uniform, the size of the pattern becomes uniform but the distance between patterns It can be formed to move away.

On the other hand, when the positions of the plurality of LED through holes 225a formed along the edge of the first part 225 are adjacent to the boundary between the first part 225 and the second part 226, the LED 229a as a light source ) May be formed to increase the density of the pattern as it moves away from.

In addition, the first light pattern 228 may be formed only on the long side 226a of the second portion 226, as shown in the drawing, but is not limited thereto and is formed on the short side 226b only or the long side It may be formed on the whole, including (226a) and the short side (226b). This may be determined according to the position of the plurality of LED through holes 225a formed along the edge of the first portion 225.

On the other hand, the second light pattern 225b is a pattern formed around each of the plurality of LED through holes 225a, and has a circular pattern, a rectangular pattern, and a square pattern. Can be formed.

At this time, the second light pattern 225c formed for the plurality of LED through holes 225a formed along the long edge of the first part 225 has a state in which the part facing the first light pattern 228 is opened. It may be provided with.

For example, a plurality of LED through-holes 225a in the first to fourth rows are formed in the first part, and a plurality of LED through-holes 225a in the first and fourth rows formed on the outer edge are formed. A second light pattern 225c having a semi-elliptical, semi-circular, and reflective angular shape in which a portion facing the one light pattern 228 is opened may be formed.

The embodiments of the present invention as described above are merely exemplary, and a person having ordinary skill in the art to which the present invention pertains can freely modify within the scope of the present invention. Accordingly, the protection scope of the present invention includes the appended claims and modifications of the present invention within the scope equivalent thereto.

100: liquid crystal display 110: liquid crystal panel
120: backlight unit 129: LED assembly
127, 227: reflector 125, 225: first part
125a, 225a: LED through hole 125b, 225b: second light pattern
126, 226: second part 128, 228: first light pattern
124: diffuser plate 121: optical sheet

Claims (14)

Liquid crystal panel; And
It includes a plurality of LEDs and a backlight unit including a LED assembly disposed under the liquid crystal panel and a reflector that reflects light emitted from each of the plurality of LEDs toward the rear side toward the liquid crystal panel,
The reflector includes a first portion and a second portion connected to have an obtuse angle along the edge of the first portion,
The inner surface of the second portion is characterized in that the first light pattern having a higher reflectance than the reflector is provided,
The first portion is provided with a plurality of LED through holes for exposing each of the plurality of LEDs, the inner surface of the first portion is provided with a second light pattern around the plurality of LED through holes,
The second optical pattern is provided with an opening in a direction toward the first optical pattern,
The second optical pattern is a liquid crystal display device characterized in that the concave round shape having a crescent shape.
According to claim 1,
Each of the plurality of LEDs is a liquid crystal display device, characterized in that a reflective LED to direct some of the light toward the liquid crystal panel and some of the light toward the rear direction.
delete According to claim 1,
When the plurality of LED through-holes are disposed adjacent to the boundary between the first part and the second part, the first light pattern is formed to increase the density of the pattern as it moves away from the plurality of LEDs. Liquid crystal display device.
According to claim 1,
The second light pattern is a liquid crystal display device, characterized in that the reflectance is lower than the reflector.
LED assemblies including multiple LEDs; And
It includes a first portion and a second portion connected to have an obtuse angle along the edge of the first portion, and includes a reflector that reflects light emitted from each of the plurality of LEDs and facing in the rear direction toward the front direction, ,
The inner surface of the second portion is provided with a first light pattern having a higher reflectivity than the reflector,
The first portion is provided with a plurality of LED through-holes for exposing each of the plurality of LEDs, the inner surface of the first portion is provided with a second light pattern around the plurality of LED through-holes,
The second optical pattern is characterized in that the opening is provided in a direction toward the first optical pattern,
The second light pattern is a backlight unit, characterized in that the concave round shape having a crescent shape.
The method of claim 6,
Each of the plurality of LEDs is a backlight unit, characterized in that a reflective LED that directs some light toward the liquid crystal panel and some light toward the rear direction.
delete The method of claim 6,
When the plurality of LED through-holes are disposed adjacent to the boundary between the first part and the second part, the first light pattern is formed to increase the density of the pattern as it moves away from the plurality of LEDs. Backlight unit to do.
The method of claim 6,
The second light pattern is a backlight unit, characterized in that the reflectance is lower than the reflector.
According to claim 1,
The first light pattern is provided on the second portion facing each other of the reflector,
The second optical pattern is a liquid crystal display device, each of which has an opening in a direction toward the second portion. The method of claim 11,
The LED through-hole is formed in a circular shape,
The second light pattern is positioned to face each other with the LED through hole therebetween by the opening,
The second optical pattern is a liquid crystal display device made of a crescent shape each concave toward the LED through hole.
According to claim 1,
The second optical pattern adjacent to the second portion and positioned at the outermost portion of the first portion is provided with an opening in each direction toward the first optical pattern.
The method of claim 13,
The second optical pattern positioned at the center of the first portion completely surrounds the LED through hole.

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