KR20110028142A - Reflector of back light and liquid crystal display device having thereof - Google Patents

Abstract

PURPOSE: A reflector of a backlight and a liquid crystal display device having the same are provided to prevent the leakage of light between a main support unit and a backlight and the deterioration of image quality. CONSTITUTION: An LCD(Liquid Crystal Display) device comprises a liquid crystal panel(110), a backlight, a main support unit(125), and a lower cover(140). The liquid crystal panel includes a first substrate(111), a second substrate(113) and a liquid crystal layer, wherein the liquid crystal layer is prepared between the second substrate and the liquid crystal layer. The backlight comprises plural LEDs(Light Emitting Diodes)(150) which emit light by being placed on one or both surfaces of the liquid crystal panel, a housing(152) which includes a reflection layer therein to reflect the light emitted from the LEDs, a light guide plate(120) guide the light emitted from the LEDs to the liquid crystal panel, a dispersion sheet which disperses the light supplied to the liquid crystal panel, a prism sheet which collects the dispersed light by being planed between the liquid crystal panel and the light guide plate, a lower cover which is placed at a lower portion of the main support unit; and a reflection plate(128) which improves the efficiency of light by reflecting the light inputted to the light guide plate.

Description

REFLECTOR OF BACK LIGHT AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THEREOF}

The present invention relates to a reflective plate of a backlight and a liquid crystal display device having the same, and particularly, the reflective plate is formed between the main support and the backlight by extending the side of the main support from the lower part of the light guide plate to the upper surface and a part of the upper surface of the optical sheet. The present invention relates to a reflective plate and a liquid crystal display device having the same, which can prevent light leakage and reduce manufacturing costs.

Recently, with the development of various portable electronic devices such as mobile phones, PDAs, and notebook computers, there is a growing demand for flat panel display devices for light and thin applications. Such flat panel displays have been actively researched, such as liquid crystal displays (LCDs), plasma display panels (PDPs), field emission displays (FEDs), and vacuum fluorescent displays (VFDs). Currently, liquid crystal displays (LCDs) are mainly in the spotlight for the realization of large-area screens.

The liquid crystal display is a transmissive display and displays a desired image on the screen by adjusting the amount of light passing through the liquid crystal layer by the refractive index anisotropy of the liquid crystal molecules. Accordingly, in the liquid crystal display device, a back light, which is a light source passing through the liquid crystal layer, is provided for displaying an image. In general, the backlight can be classified into two types.

The first is a side type backlight that is provided on the side of the liquid crystal panel to provide light to the liquid crystal layer, and the second is a direct type backlight that provides light directly under the liquid crystal panel.

The side backlight may be installed on the side of the liquid crystal panel to supply light to the liquid crystal layer through the reflection plate and the light guide plate. Therefore, since the thickness can be made thin, it is mainly used in notebooks and the like which require a thin display device. However, the side backlight is difficult to apply to a large area liquid crystal panel because the lamp for emitting light is located on the side of the liquid crystal panel, it is difficult to obtain high brightness because light is supplied through the light guide plate. Therefore, there has been a problem that it is not suitable for the large-area liquid crystal panel for LCD TVs, which is in the spotlight recently.

The direct type backlight is used to manufacture a liquid crystal panel for an LCD TV since the light emitted from the lamp is directly supplied to the liquid crystal layer and can be applied to a large area liquid crystal panel as well as high brightness.

On the other hand, in recent years, as a lamp of the backlight, instead of a fluorescent lamp, a light source that emits light itself, such as a light emitting device (Light Emitting Device). Since the light emitting device emits R, G, and B monochromatic light, it has the advantage of good color reproduction and reduction of driving power when applied to the backlight.

1 is a cross-sectional view schematically showing the structure of a conventional liquid crystal display device having a backlight including the light emitting device as described above.

As shown in FIG. 1, the conventional liquid crystal display device 1 includes a first substrate 11 and a second substrate 13, and a liquid crystal layer (not shown) between them, so that a signal is applied from the outside. A liquid crystal panel 10 for realizing an image, a housing 52 to which a plurality of LEDs (Light Emitting Devices) 50 are disposed and disposed on a lower side of the liquid crystal panel 10 to emit light, and the liquid crystal panel A light guide plate 20 disposed below the light source 10 to guide the light emitted from the LED 50 to the liquid crystal panel 10, and is provided between the liquid crystal panel 10 and the light guide plate 20. A diffusion sheet 32 for guiding light supplied from the diffusion sheet 20 to the liquid crystal panel 10, a prism sheet 34 positioned on the diffusion sheet 32 to collect diffused light, and the light guide plate 20. 20 is disposed below the main support portion 25 for supporting the light guide plate 20 and the liquid crystal panel 10, and the main support portion 25 of the main support portion 25. Located in the portion consists of the liquid crystal panel 10, the light guide plate 20, a diffusion sheet 32, the prism sheet 34 and the main supporting the lower cover 40, which is 25, is assembled.

In addition, a reflector plate 28 is formed on the lower cover 40 to reflect light incident on the lower cover 40 to the liquid crystal panel 10 to improve light efficiency.

Although not shown in the drawing, the first substrate 1 of the liquid crystal panel 10 includes a plurality of pixels, each pixel includes a pixel electrode and a thin film transistor, and the second substrate 3 includes a common electrode. When the signal is applied from the outside through the thin film transistor, an electric field is formed in the liquid crystal layer to control the orientation of the liquid crystal molecules, thereby controlling the amount of light transmitted through the liquid crystal layer to realize an image. In this case, the first polarizing plate 16 and the second polarizing plate 18 are attached to the first substrate 1 and the second substrate 3, respectively, to control the polarization directions of the light incident on the liquid crystal layer and the light output from the liquid crystal layer. This is to control the amount of light transmitted through the liquid crystal layer.

A light shielding tape 55 is disposed between the liquid crystal panel 10 and the backlight, strictly speaking, between the prism sheet 34 and the main support portion 25. The light blocking tape 55 is to prevent light leakage from the outer region of the liquid crystal panel 10, that is, the backlight and the main support part 25, thereby causing a poor image quality.

The light blocking tape 55 includes an adhesive surface, and the adhesive surface is attached to the main support part 25 and the prism sheet 24 to prevent light leakage from being located between the backlight and the main support part 25.

However, the liquid crystal display device having the above structure has the following problems.

In order to fabricate the liquid crystal display device, first, the reflective plate 28 is seated on the lower cover 40, and then the main support part 25 is disposed on the lower cover 40 on both sides of the reflective plate 28. Subsequently, the housing 52 in which the LEDs 50 are installed is disposed on one side or both sides of the reflecting plate 28, and then the light guide plate 20 is positioned on the side of the LED 50 above the reflecting plate 28. .

Thereafter, a diffusion sheet 32 is disposed on the light guide plate 20 and a prism sheet 34 positioned on the diffusion sheet 32 to collect diffused light, and then the prism sheet 34 is disposed on the light guide plate 20. By attaching the light blocking tape 55 on the main support part 25 and then placing the liquid crystal panel 10 on the prism sheet 34, the liquid crystal display device can be assembled.

Thus, the liquid crystal display element is completed by assembling each component. Accordingly, when assembling the components, an error may occur between the respective components. This error has a problem in that light is leaked between the components of the liquid crystal display, thereby degrading the image quality of the liquid crystal display.

On the other hand, in order to prevent such light leakage, the light-shielding tape 55 is attached, but since the light-shielding tape 55 is formed only on a predetermined area of the prism sheet 34 and the main support portion 25, the LED portion 50 and The light leaking between the main support portions 25 and the like could not be completely blocked. In addition, since the light shielding tape 55 is attached to the prism sheet 34 and the main support part 25 along the four sides of the liquid crystal panel 10, the assembly process is delayed, and the light shielding tape 55 is attached to the light shielding tape 55. When the protective film is removed), wrinkles occur in the prism sheet due to the adhesive force of the light-shielding tape 55, thereby deteriorating the image quality.

The present invention has been made to solve the above problems, and is formed by integrally forming a reflecting portion for reflecting light and a light shielding portion for blocking the light to extend from the lower side of the light guide plate to the side of the main support and the upper surface of the main support and the upper surface of the optical sheet. It is an object of the present invention to provide a reflector that can reduce costs, prevent image degradation, and shorten the assembly process.

Another object of the present invention is to provide a liquid crystal display device having the reflection plate as described above.

In order to achieve the above object, the liquid crystal display device according to the present invention comprises a liquid crystal panel; A light source disposed under the liquid crystal panel to emit light; A light guide plate disposed under the liquid crystal panel to guide light incident from a light source to the liquid crystal panel; An optical sheet disposed on the light guide plate to improve efficiency of light supplied to the liquid crystal panel; A reflection plate disposed under the light guide plate to reflect incident light; And a main support part for fixing the liquid crystal panel, the light guide plate, a light source, and an optical sheet, wherein the reflector includes a reflection part for reflecting incident light and a light shielding part for blocking incident light, and extending to an upper surface of the main support part. , The light shielding part covers an upper surface of the main support part and a part of the upper surface of the optical sheet.

The reflector is a reflector; A light blocking unit formed outside the reflecting unit; At least one first bend line formed in the reflector to bend the reflector; And a second bent line formed in the reflector and the light shield to bend the reflector and the light shield to completely surround the light guide plate, the light source, and the optical sheet.

In the present invention, the following effects can be obtained.

First, in the present invention, since the reflecting plate 128 surrounds the outer region of the backlight as the reflecting plate extends to the upper surface of the prism sheet as well as the side and the upper surface of the main support part, even when an error occurs when assembling each component from the backlight. Since the generated light can be prevented from leaking between the main support part and the backlight, the image quality can be prevented from being lowered.

Second, in the present invention, since the reflecting portion and the light shielding portion of the reflecting plate are integrally formed, manufacturing cost can be reduced as compared with the conventional assembly of separate components.

Third, conventionally, in order to attach the light shielding tape to the main support and the prism sheet, after removing the protection film of the light shielding tape, the light shielding tape is aligned with the main support and the prism sheet, and the pressure is applied to the light shielding tape to apply the light shielding tape to the main. In contrast to the support and the prism sheet, in the present invention, the light shield can be disposed on the main support and the prism sheet simply by bending the reflector plate, thereby simplifying the assembly process.

Fourth, since the present invention does not need to remove the protective film of the light-shielding tape, it is possible to solve the problem of wrinkles of the conventional optical sheet generated when the protective film is removed.

Hereinafter, a light shielding tape structure and a method of manufacturing a liquid crystal display device according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a view showing a liquid crystal display device according to the present invention.

As shown in FIG. 2, the liquid crystal display device 101 according to the present invention includes a liquid crystal panel 110, a backlight, and a main support part 125 and a lower cover 140 for assembling the backlight with the liquid crystal panel 110. Is made of.

The liquid crystal panel 110 includes a first substrate 111 and a second substrate 113 and a liquid crystal layer (not shown) therebetween. Although not shown in the drawing, a plurality of gate lines and data lines are formed on the first substrate 111 to be arranged horizontally and horizontally to define a plurality of pixel regions, and thin film transistors, which are switching elements, are formed in each pixel region. The formed pixel electrode is formed on the pixel region. The thin film transistor may include a gate electrode connected to a gate line, a semiconductor layer formed by stacking amorphous silicon, etc. on the gate electrode, a source electrode and a drain electrode formed on the semiconductor layer and connected to the data line and the pixel electrode. .

The second substrate 113 is a color filter composed of a plurality of sub-color filters for implementing colors of red (R), green (G), and blue (B), and the sub-color filter. A black matrix for dividing and blocking light passing through the liquid crystal layer, and a transparent common electrode for applying a voltage to the liquid crystal layer.

The first substrate 111 and the second substrate 113 configured as described above are joined to face each other by a sealant (not shown) formed on the outer side of the image display area to form a liquid crystal panel. The first substrate 111 ) And the second substrate 113 are bonded through a bonding key (not shown) formed on the first substrate 111 or the second substrate 113.

Meanwhile, the liquid crystal panel 110 has a pixel electrode formed on the first substrate 111 and a common electrode formed on the second substrate 113 as described above, so that the liquid crystal layer 110 is perpendicular to the surface of the first substrate 111. TN mode (Twisted Nematic mode) may be applied, and the common electrode and the pixel electrode are formed parallel to each other on the first substrate 111 to apply an electric field horizontal to the surface of the first substrate 111 to the liquid crystal layer. It may also be an IPS mode (In-Plane Switching mode).

A first polarizing plate 116 and a second polarizing plate 118 are attached to the first substrate 111 and the second substrate 113, respectively, to polarize light input and output to the liquid crystal panel 110 to implement an image. .

The backlight is disposed on one side or both sides of the lower portion of the liquid crystal panel 110 to emit light, and the LED 150 is attached and a reflective layer is formed therein to emit to the LED 150. A light guide plate disposed on a side surface of the housing 152 that reflects the light and guides the light emitted from the LED 150 to the liquid crystal panel 110. 120, a diffusion sheet 32 provided between the liquid crystal panel 110 and the light guide plate 120 to diffuse light supplied from the light guide plate 120 to the liquid crystal panel 110 and the diffusion sheet 132. A prism sheet 134 for condensing diffused light at an upper portion thereof, a main support portion 125 for supporting the light guide plate 120 and the liquid crystal panel 110, and a lower portion of the main support portion 125. The liquid crystal panel 110, the light guide plate 120, the diffusion sheet 132, the prism sheet 134, and the main support part 125. Comprises a server 140, the lower cover 140 and the light guide plate reflective plate 128 to improve the light efficiency by reflecting the light input to the light guide plate 120 is arranged between the unit 120.

The reflecting plate 128 extends not only below the light guide plate 120 but also to the housing 152 of the LED and to the side of the main support part 125 (that is, the side of the light guide plate 120) and the top surface of the main support part 125. Is extended. In addition, the reflective plate 128 is completely folded at the upper edge portion of the main support portion 125, and then extends from the main support portion 125 to the prism sheet 124.

In this case, the reflecting plate 128 is composed of two regions. That is, the reflecting plate 128 is composed of a reflecting portion and a light shielding portion. 3 shows a reflecting plate 128 according to the present invention. As shown in FIG. 3, the reflector 128 includes a reflector 128a and a light shield 128b, wherein the reflector 128a is made of a material having a high reflectance and is input from the light guide plate 120. By reflecting the light, the light guide plate 120 is positioned on the lower side and the upper surface of the main support part 125. The light blocking portion 128b is made of an opaque material to block light. The light blocking portion 128b is disposed on the upper surface of the main support portion 125 and the upper surface of the prism sheet 124 so that light is transmitted between the main support portion 125 and the prism sheet 124. Blocks transmission In this case, the reflecting portion 128a and the light blocking portion 128b may be formed separately, but are preferably formed integrally.

The reflector 128a is made of a reflective film such as ESR (Enhanced Specular Reflector), and the light shield 128b is made of a light shielding film made of polyethylene terephthalate (PET), and the reflective film and the light shielding film are laminated. It can be integrated by laminating.

As shown in FIG. 3, a plurality of bend lines 128d are formed between the reflecting portion 128a and the light blocking portion 128b. The bending line 128d folds the reflecting plate 128 to extend the reflecting portion 128a to the side and the upper surface of the main support portion 125, and the light shielding portion 128b to the upper surface of the main support portion 125 and the prism sheet ( 134) to be positioned at the top. That is, three bent lines 128d are formed, the first bent line folding the reflector plate 128 from the upper surface of the lower cover 140 to the side of the main support part 125, and the main side of the main support part 125. The second bend line that folds the reflector plate 128 into the upper surface of the support part 125, the reflector plate 128 is completely folded on the upper surface of the main support part 125 so that the reflector plate 128 overlaps in this area so that the difference between the reflector plate 128 is different. The light portion 128b includes a third bent line located on the upper surface of the main support portion 125 and the upper surface of the prism sheet 134.

This bend line 128d may be made in a variety of ways. For example, the reflecting plate 128 can be bent by half-cutting the reflecting plate 128 along the bend line 128d.

On the other hand, reference numeral 128c denotes an area located between the reflecting portion 128a and the light blocking portion 128b, that is, the side surface and the upper surface of the main support portion 125. Since light does not substantially enter the side and top surfaces of the main support part 125, the region 128c may be formed of any material, but is preferably formed of the same material as the reflector 128a. The reason for this is that the light exiting the light guide plate 120 travels along the optical sheet such as the diffusion sheet 132 or the prism sheet 134 to the side of the optical sheet, or light leaks between the light guide plate 120 and the optical sheet. Can be. The leaked light is blocked from being transmitted to the outside (that is, the liquid crystal panel) by the region 128c. The region 128c is formed of a material having a high reflectance, and the leaked light is then returned to the light guide plate 120 or the like. By reflecting to the optical sheet side, the light efficiency can be further improved. As such, when the region 128c is formed of the same material as the reflector 128a, the region 128c may be regarded as a reflector.

As described above, in the present invention, since the reflecting plate 128 extends not only to the side and the top surface of the main support part 125 but also to the top surface of the prism sheet 134, the reflecting plate 128 surrounds the outer region of the backlight. Even when an error occurs when assembling the parts of the light emitted from the backlight can be prevented from leaking between the main support portion 125 and the backlight, it is possible to prevent the degradation of the image quality.

In addition, since the reflecting portion 128a and the light blocking portion 128b of the reflecting plate 128 are integrally formed, the manufacturing cost can be reduced as compared with the conventional assembly of separate components. Further, conventionally, in order to attach the light shielding tape to the main support and the prism sheet, after removing the protection film of the light shielding tape, the light shielding tape is aligned with the main support and the prism sheet, and the pressure is applied to the light shielding tape to apply the light shielding tape to the main. In contrast to the support and the prism sheet, in the present invention, the light shielding portion 128b can be disposed on the main support 125 and the prism sheet 134 by simply bending the reflecting plate, thereby simplifying the assembly process.

The light guide plate 120 is used to guide the light input from the LED 150 to the liquid crystal panel 110, and the light incident on one side of the light guide plate 120 is reflected from the top and bottom surfaces of the light guide plate 120 to the other side. After being propagated, the light guide plate 120 is output to the outside. In this case, the light guide plate 120 may be formed of a rectangular parallelepiped, and a pattern or a groove may be formed on the bottom surface of the light guide plate 120 to scatter incident light.

The LED 150 disposed on the side of the light guide plate 120 is installed inside the housing 152, and a reflective layer is formed on an inner surface of the housing 152 to reflect light emitted from the LED 150 to reflect the light guide plate 120. It is incident on the side of. Strictly speaking, the housing 152 is installed on the reflecting plate 128 disposed on the side of the light guide plate 120.

As the LED 150, an R, G, B LED or white light emitting LED which emits monochromatic light of R (Red), G (Green), B (Blue) may be used.

When the LED emitting monochromatic light is arranged, the monochromatic light LEDs of R, G, and B are alternately arranged at regular intervals, and the monochromatic light emitted from the LED is mixed with white light and then supplied to the liquid crystal panel 110 to emit white light. When the LED device is provided, the plurality of LED devices are arranged at a predetermined interval to supply white light to the liquid crystal panel 110.

In this case, the white light LED element is composed of a blue LED emitting blue light and a phosphor absorbing blue monochromatic light to emit yellow light, and the blue monochromatic light output from the blue LED and the yellow monochromatic light emitted from the phosphor are mixed to form a white light. It is supplied to the panel 110.

In the drawing, the LEDs 150 are disposed on one side or both sides of the light guide plate 120, but a plurality of LEDs 150 may be disposed under the liquid crystal panel 120. When the plurality of LEDs 150 are disposed below the liquid crystal panel 120, the light emitted from the LEDs 150 is supplied to the liquid crystal panel 110 through the light guide plate 120. As such, when the LED 150 is disposed below the liquid crystal panel 120, the light guide plate 120 may be omitted to directly supply light to the liquid crystal panel 110.

Although not shown in the figure, the LED 150 is mounted on an LED substrate. The LED substrate is formed of an opaque printed circuit board or a flexible circuit board. The LED is mounted and a signal wiring is formed on the upper or lower surface of the LED board to be electrically connected to the lead wire of the LED unit. In addition, an inverter for applying power to the LED, a connector for connecting the inverter to the LED, and an LED controller may be mounted on the LED substrate. In this case, the inverter, a connector connecting the inverter and the LED unit, and an LED controller controlling the LED unit are connected to the LED through a signal line formed on the LED substrate.

The diffusion sheet 132 disposed on the light guide plate 120 is configured to diffuse the light output from the light guide plate 120 to maintain a constant brightness. The diffusion sheet 132 is formed of an acrylic resin mainly on a base film made of polyester (PET). It is produced by distributing spherical seeds. The light output from the light guide plate 120 is diffused from the spherical seed so that the brightness of the light output is uniform. Although one diffusion sheet 132 is provided in the drawing, two or more sheets may be used depending on the size of the liquid crystal display, the type of backlight used, and the like.

The prism sheet 134 is provided on the diffusion sheet 132 to collect light diffused from the diffusion sheet 132, and forms a regular prism with an acrylic resin on a base film mainly made of polyester (PET). Produced by In this case, the prism is an isosceles triangle extending in the x-direction and the y-direction, and the light is incident perpendicularly to the surface of the liquid crystal panel 110 by condensing the light in the x- and y-directions.

The liquid crystal panel 110, the light guide plate 120, the LED unit 150, the diffusion sheet 132, the prism sheet 134, and the like are supported by the main support unit 125 and then assembled by the lower cover 140.

4A and 4B illustrate the assembling of the liquid crystal display device, and in particular, illustrates the assembly of the liquid crystal display device centering on the installation of the reflector plate 128.

First, as shown in FIG. 4A, the main support part 125 is positioned on both sides of the lower cover 140, and then the reflecting plate 128 is disposed on the upper surface of the lower cover 140. Subsequently, the reflector plate 128 is bent along a bending line to bring the reflector plate 128 into close contact with the side surface and the upper surface of the main support part 125, and then onto the reflector plate 128, the LED 152, the light guide plate 120, and the diffusion plate. The sheet 132 and the prism sheet 134 are provided.

Thereafter, as shown in FIG. 4B, the light blocking portion 128b of the reflecting plate 128 is bent along the bending line, so that the light blocking portion 128b is disposed on the upper surface of the main support 125. ) So that it overlaps. In this case, the light blocking part 128b extends to the prism sheet 134 on the upper surface of the light guide plate 120 to cover the main support part 125 and a part of the prism sheet 134.

As described above, in the present invention, the reflecting plate 128 is formed of the reflecting portion 128a and the light shielding portion 128b, extended to the side and the upper surface of the main support portion 125, and then bent to the light shielding portion 128b. By configuring the main support part 125 and a part of the optical sheet to prevent the light from leaking between the main support part 125 and the optical sheet.

In addition, although the shape of the reflecting plate was limited to the specific shape in the above-mentioned detailed description, this invention is not limited to this specific shape. Any shape or size may be possible as long as the reflector is made of a reflector and a light shield to extend to the upper surface of the main support and the upper surface of the optical sheet so as to effectively prevent light from leaking to the corresponding area.

In addition, a liquid crystal panel or a backlight applied to the present invention can be variously configured. For example, in the detailed description, only a backlight employing LEDs as a light source may be used. However, a backlight applied to a light source including a fluorescent lamp such as a Cold Cathod Fluorescent Lamp (CCFL) or an External Electrode Fluorescent Lamp (EEFL) may be applied.

In other words, other examples or modifications of the present invention can be easily created by anyone in the technical field to which the liquid crystal display device using the basic concept of the present invention belongs.

1 is a cross-sectional view showing the structure of a conventional liquid crystal display device.

2 is a view showing the structure of a liquid crystal display device according to the present invention;

3 is a view showing the structure of a reflecting plate according to the present invention.

4A and 4B are enlarged cross-sectional views of the portion A of FIG. 2, illustrating a process of assembling a reflector.

Explanation of symbols on the main parts of the drawings

110: liquid crystal panel 120: light guide plate

128: reflector 128a: reflector

128b: shading portion 128d: bending line

132: diffusion sheet 134: prism sheet

Claims (9)

A liquid crystal panel; A light source disposed under the liquid crystal panel to emit light; A light guide plate disposed under the liquid crystal panel to guide light incident from a light source to the liquid crystal panel; An optical sheet disposed on the light guide plate to improve efficiency of light supplied to the liquid crystal panel; A reflection plate disposed under the light guide plate to reflect incident light; And It consists of a main support for fixing the liquid crystal panel, the light guide plate, the light source and the optical sheet, The reflector may include a reflector for reflecting incident light and a shield for blocking incident light. The reflector may be extended to an upper surface of the main support part and then bent to cover the upper surface of the main support part and an upper surface of the optical sheet. Liquid crystal display device. The liquid crystal display of claim 1, wherein the light source is a light emitting device (LED) disposed on a side of the light guide plate. The liquid crystal display of claim 1, wherein the light source is an LED disposed under the liquid crystal panel. The liquid crystal display of claim 1, wherein the light source is a fluorescent lamp disposed on a side of the light guide plate. The method of claim 1, wherein the reflecting plate is formed with a plurality of bent lines, the reflector is bent in the region corresponding to the side surface of the main support portion, the region corresponding to the upper surface of the main support portion, and the region between the reflecting portion and the light shielding portion A liquid crystal display device characterized by the above-mentioned. The liquid crystal display device of claim 5, wherein the reflective plate completely surrounds the light guide plate, the light source, and the optical sheet. The method of claim 1, wherein the optical sheet, A diffusion sheet for diffusing the light output from the light guide plate; And A liquid crystal display device comprising a prism sheet for collecting light diffused by a diffusion sheet. The liquid crystal display device of claim 1, further comprising a lower cover for assembling the liquid crystal panel, the light guide plate, the light source, the optical sheet, and the main support part. A reflector; A light blocking unit formed outside the reflecting unit; At least one first bend line formed in the reflector to bend the reflector; And And a second bending line formed in the reflector and the light shield to bend the reflector and the light shield.

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