KR20140026187A - Liquid crystal display device having minimized bezzel - Google Patents

Abstract

The present invention relates to a liquid crystal display device capable of reducing the size of a guide panel to minimize a bezel. The liquid crystal display device comprises a liquid crystal panel for realizing an image; a light source for providing the liquid crystal panel with light; a light guide plate for guiding, to the liquid crystal panel, the light inputted by the light source; a cutting part which is formed at both sides of the lower surface of the light guide plate; a reflection plate which is arranged in the lower part of the light guide plate to reflect the light outputted by the light guide plate to the light guide plate; a guide panel having the liquid crystal panel mounted in the upper surface thereof; a double-sided tape which is extended to the cutting part of the light guide plate in the guide panel, has one surface attached to the reflection plate and other surface attached to the lower surface of the guide panel and the surface of the light guide plate of the cutting part and fixes the reflection plate to the guide panel and the light guide plate; a lower cover for containing the light guide plate and the guide panel; and an upper cover which is coupled to the lower cover and the guide panel.

Description

Liquid Crystal Display Device with Minimized Bezel {LIQUID CRYSTAL DISPLAY DEVICE HAVING MINIMIZED BEZZEL}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of minimizing the size of the main support by minimizing the attachment area of the main support of the double-sided tape for attaching the reflector to the main support.

2. Description of the Related Art Recently, various portable electronic devices such as a mobile phone, a PDA, and a notebook computer have been developed. Accordingly, there is a growing need for a flat panel display device for a light and small size. As such flat panel display devices, a liquid crystal display (LCD), a plasma display panel (PDP), a field emission display (FED), and a vacuum fluorescent display (VFD) have been actively studied. However, mass production technology, ease of driving means, , Liquid crystal display devices (LCDs) are mainly receiving the spotlight because of realization of a large-sized screen.

The liquid crystal display element is a transmissive display element and displays a desired image on the screen by adjusting the amount of light transmitted through the liquid crystal layer by refractive index anisotropy of liquid crystal molecules. Therefore, in a liquid crystal display element, a back light, which is a light source that transmits the liquid crystal layer for displaying an image, is provided. Generally, the backlight can be roughly divided into two types.

The first is a side-view backlight that is installed 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 below the liquid crystal panel.

The side-type backlight is provided on the side surface of the liquid crystal panel and can supply light to the liquid crystal layer through the reflection plate and the light guide plate. Therefore, since the thickness can be made thinner, it is mainly used for a notebook or the like requiring a thin display device. However, the side-type backlight is difficult to apply to a large-area liquid crystal panel because the lamp that emits light is located on the side surface of the liquid crystal panel, and light is supplied through the light guide plate. Therefore, there has been a problem in that it is not suitable for large-area liquid crystal panel for LCD TV, which has recently been spotlighted.

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

1 is a view showing a conventional liquid crystal display device equipped with a backlight.

As shown in FIG. 1, a conventional liquid crystal display device includes a first substrate 1 and a second substrate 3 and a liquid crystal layer (not shown) therebetween to implement an image as a signal is applied from the outside. A liquid crystal panel 10, a light guide plate 35 disposed under the liquid crystal panel 10 to guide light emitted from a light source (not shown) to the liquid crystal panel 10, and the liquid crystal panel 10. An optical device including a diffusion sheet 38a and a prism sheet 38b and 38c provided between the panel 10 and the light guide plate 35 to diffuse and collect light that is guided from the light guide plate 35 to the liquid crystal panel 10. A sheet 38, a reflector plate 36 disposed below the light guide plate 35 to reflect light directed to the lower portion of the light guide plate 35, the reflector plate 36, the light guide plate 35, and an optical sheet 38. Is coupled to the lower cover 40 and the lower cover 40 to accommodate the reflective plate 36, the light guide plate 35, and the optical sheet 38. And that on the guide panel and the liquid crystal panel 42 to 10. This position, in combination with the guide panel 42 consists of an upper cover 46 to assemble a liquid crystal panel 10.

The first substrate 1 of the liquid crystal panel 10 is a thin film transistor array substrate on which thin film transistors are formed. In addition to the thin film transistors, various wirings and pixel electrodes are formed on the first substrate 1. The second substrate 2 is a color filter substrate, and a color filter layer and a black matrix are formed. In addition, a first polarizing plate 3 and a second polarizing plate 4 are attached to the first substrate 1 and the second substrate 2 of the liquid crystal panel 10, respectively, and are input to and output from the liquid crystal panel 10. An image is realized by changing the polarization state of light.

The guide panel 42 includes a first area 42a assembled with the lower cover 40 and the upper cover 46 and a second area 42b supporting the liquid crystal panel 10. At this time, the pad 31 having the adhesive force is disposed on the upper surface of the second region 42b and the liquid crystal panel 10 is placed on the pad 31 to fix the liquid crystal panel 10 to the guide panel 42. The double-sided tape 32 is disposed on the lower surface of the second region 42b to fix the reflecting plate 36 to the guide panel 42 to prevent the reflecting plate 36 from flowing by an external impact.

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

As shown in FIG. 2, the double-sided tape 32 is attached to the guide panel 42 because the double-sided tape 32 must maintain a constant adhesive force in order to firmly fix the reflective plate 36 to the guide panel 42. The area to be kept must be at least a certain area.

In the conventional liquid crystal display device, the width a1 of the double-sided tape 32 is about 0.6 mm. In addition, the mounting tolerances of the double-sided tape 32 at the time of assembling the liquid crystal display device are 0.15 mm on both sides a2 of the double-sided tape 32, respectively. Therefore, the area occupied by the double-sided tape 32 is about 0.9 mm in consideration of the width a1 and the tolerance a2.

The area occupied by the double-sided tape 32 is a bezel area in which an actual image is not realized. On the other hand, recently, liquid crystal display devices that minimize the area of the bezel to reduce the size and make the aesthetics beautiful are in the spotlight. However, as described above, since the area occupied by the double-sided tape 32 is impossible to be reduced to 0.9 mm or less, there is a limit in reducing the area of the bezel to a minimum.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to provide a liquid crystal display device capable of minimizing the size of the guide panel by minimizing the size of the guide panel by reducing the adhesion area of the double-sided tape and the guide panel to which the reflective plate is attached. .

In order to achieve the above object, the liquid crystal display device according to the present invention comprises a liquid crystal panel is implemented image; A light source for supplying light to the liquid crystal panel; A light guide plate for guiding light input from the light source to a liquid crystal panel; Cutouts formed on both sides of a lower surface of the light guide plate; A reflector disposed under the light guide plate to reflect light output from the light guide plate back to the light guide plate; A guide panel on which a liquid crystal panel is placed; A double-sided tape extending from the guide panel to the cutout of the light guide plate, one surface of which is attached to the reflecting plate and the other surface of which is attached to the lower surface of the guide panel and the light guide plate surface of the cutout, thereby fixing the reflecting plate to the guide panel and the light guide plate; A lower cover accommodating the light guide plate and the guide panel; And an upper cover coupled to the lower cover and the guide panel.

Coupling grooves or coupling protrusions are formed on both sides of the light guide plate from the upper side to the bottom side, and on both inner sides of the lower cover, coupling protrusions or coupling grooves are formed from the top side to the bottom side to couple with the coupling grooves or coupling protrusions. The cutout is formed on the same surface as the coupling protrusion or the coupling groove to reduce the size of the coupling protrusion or the coupling groove to minimize light scattering by the coupling protrusion or the coupling groove.

In the present invention, the reflective plate can be fixed by removing a part of the lower surface of the guide panel and extending the double-sided tape to this area to attach a portion of the double-sided tape to the guide panel. Therefore, it is possible to reduce the attachment area of the double-sided tape attached to the guide panel to reduce the size of the guide panel, as a result it is possible to minimize the area of the bezel.

In addition, in the present invention, since the cutout portion of the light guide plate is formed on the surface on which the coupling groove or the coupling protrusion is coupled to the lower cover, the coupling groove or the coupling protrusion area is reduced by the cutout, thereby resulting in uneven luminance due to the coupling groove or the coupling protrusion. Defects can be reduced.

1 is a cross-sectional view showing the structure of a conventional liquid crystal display device.
2 is a partially enlarged view of FIG. 1;
3 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.
4 is a cross-sectional view of a liquid crystal display device according to an embodiment of the present invention.
5 is a partial enlarged view of Fig.
6 is a cross-sectional view of a liquid crystal display device according to another embodiment of the present invention.

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

The best method for manufacturing a liquid crystal display device having a beautiful appearance by reducing the bezel is to reduce the size of the guide panel. However, in this case, since the adhesion area of the reflecting plate attached to the guide panel is reduced, the reflecting plate flows due to external force, which causes defects in the assembled liquid crystal display device. Double-sided tape with improved adhesion can be used to have the same adhesion. However, in order to manufacture the double-sided tape substantially, the double-sided tape must be formed at least the minimum width, so there is a limit to reducing the width of the double-sided tape, even if the adhesion is improved. In addition, the double-sided tape having improved adhesion has a problem that it is difficult to correct the cost if the mounting position of the double-sided tape is wrong as well as expensive.

The present invention proposes a structure for fixing the reflector by the same adhesion as before while reducing the size of the guide panel without using an expensive double-sided tape with improved adhesion. Particularly, in the present invention, a portion of the light guide plate is cut to attach a portion of the double-sided tape to the cut light guide plate, so that the reflective plate is attached to the guide panel and the light guide plate, thereby minimizing the bezel.

3 is an exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the liquid crystal display device according to the exemplary embodiment includes a liquid crystal panel 110 and a backlight. The liquid crystal panel 110 includes a first substrate 101 and a second substrate 103, and a liquid crystal layer (not shown) between the first substrate 101 and the second substrate 103, and implements an image as a signal is applied from the outside.

The backlight is mounted on the LED substrate 133 to emit light, and a plurality of LEDs (Light Emitting Device; 134), and disposed under the liquid crystal panel 110 to guide the light emitted from the LED 134 to the A light guide plate 135 to be supplied to the liquid crystal panel 110 and a light guide plate 135 provided between the liquid crystal panel 110 and the light guide plate 135 to be diffused and collected by the light guide plate 135 to be supplied to the liquid crystal panel 110. An optical sheet 138 composed of a diffusion sheet 138a and a prism sheet 138b and 138c, and a reflecting plate 136 disposed under the light guide plate 135 to reflect light directed to the bottom of the light guide plate 35. .

Although the LED substrate 133 and the LED 134 are disposed only on one side of the light guide plate 135 in the drawing, the LED substrate 133 and the LED 134 may be disposed on both side surfaces of the light guide plate 135.

In addition, although the LED 134 is disclosed as the light source in the present invention, a fluorescent lamp such as a cold cathod fluorescent lamp (CCFL) or an external eletrode fluorescent lamp (EEFL) may be used instead of the LED 134. When the fluorescent lamp is used as a light source, a lamp housing in which the fluorescent lamp is disposed is disposed instead of the LED substrate 133 on the side of the light guide plate 135.

The reflective plate 136, the light guide plate 135, and the optical sheet 138 of the backlight are accommodated in the lower cover 140, and then assembled as the lower cover 140 and the guide panel 142 are coupled to each other.

A liquid crystal panel 110 is placed on the guide panel 142. The guide panel 142 is formed in a quadrangular shape such that an edge region of the liquid crystal panel 110 is placed on the guide panel 142.

The pad 131 is attached to an upper surface of the guide panel 142, and the liquid crystal panel 110 is placed on the pad 131. Since the pad 131 is made of a material having elasticity such as resin, when the liquid crystal panel 110 is fixed, an impact is applied from the outside, so that the shock is absorbed by the pad 131 and the liquid crystal panel 110 is broken. Can be prevented. The pad 131 has a predetermined width and the same length as one side of the guide panel 142, and is disposed along both sides of the upper surface of the guide panel 142. In addition, an adhesive material is coated on upper and lower surfaces of the pad 131 to fix the liquid crystal panel 110 to the guide panel 142 to prevent the liquid crystal panel 110 from flowing by an external force.

In the drawing, the pad 131 is disposed only on the upper surfaces of both sides of the guide panel 142, but may be disposed on the upper surfaces of four sides of the guide panel 142.

The light guide plate 135 is for guiding the light input from the LED 134 through the side surface to the liquid crystal panel 110, and the light incident on one side or both sides of the light guide plate 135 is reflected inside the light guide plate 135. After propagating to the side surface, it is supplied to the liquid crystal panel 110 through the upper surface of the light guide plate 135.

At this time, two coupling grooves 135b are formed on both sides of the light guide plate 135 in the shape of a groove in a rectangular shape or an elliptical shape along the lower side from the upper side. When the coupling groove 135b is coupled to the lower cover 140, the light guide plate 135 and the lower portion coupled to the coupling protrusion 140b formed along the lower side of the upper side of both inner side surfaces of the lower cover 140 are combined. The cover 140 is prevented from flowing by an external impact. The coupling groove 135b is formed on a surface other than the surface of the light guide plate 135 facing the LED 134. In the drawing, two coupling grooves 135b are formed on both side surfaces of the light guide plate 135, but three or more coupling grooves 135b may be formed on both side surfaces of the light guide plate 135, respectively. In other words, the coupling groove 135b has a plurality of light guide plates 135 formed on both sides thereof, and the number of coupling grooves 135b is appropriately adjusted according to the size of the light guide plate 135 so that the light guide plate 135 and the lower cover 140 do not flow. desirable.

In addition, coupling protrusions may be formed on both side surfaces of the light guide plate 135, and a plurality of coupling grooves may be formed on both side surfaces of the lower cover 140, respectively, such that the light guide plate 135 and the lower cover 140 may be coupled to each other.

In addition, cut portions 135a are formed on both bottom surfaces of the light guide plate 135. The cutout 135a is formed to have a long width to face each other along both sides at a predetermined width on the lower side of the side surface of the light guide plate 135 that does not face the LED substrate 133, that is, the coupling groove 135b. do. Of course, the cutout 135a may be formed to have a predetermined width on both sides of the lower side of the light guide plate 135 facing the LED substrate 133.

The double-sided tape 132 is disposed between the reflecting plate 136 and the guide panel 142 to attach the reflecting plate 136 to the lower surface of the guide panel 142. The double-sided tape 132 is arranged along the entire length of one side of the guide panel 142 in a set width. At this time, unlike the prior art, the double-sided tape 132 is not attached to the entire guide panel 142, but only a part of the double-sided tape 132 is attached to the cutout 1352a formed on the lower surface of the light guide plate 135. A part of the region 132 may be attached to the upper surface of the cutout 135a of the light guide plate 135.

As described above, in the present invention, since the double-sided tape 132 is not positioned only on the bottom surface of the guide panel 142 but extends to the area of the light guide plate 135, the area of the guide panel 142 to which the double-sided tape 132 is attached is attached. It is possible to reduce compared to the conventional, it is possible to reduce the width of the guide panel 142 by the attachment area which is reduced compared to the conventional.

The optical sheet 138 is supplied to the liquid crystal panel 110 by improving the efficiency of light output from the light guide plate 135. The optical sheet 138 collects the diffusion sheet 138a for diffusing the light output from the light guide plate 138 and the light diffused by the diffusion sheet 138a to supply uniform light to the liquid crystal panel 110. It consists of two prism sheets 138b and 138c, wherein the two prism sheets intersect the prism vertically in the x and y-axis directions, respectively, to refract the light in the x and y-axis directions, thereby allowing the light to go straight. Improve.

An upper cover 146 is disposed in an upper edge region of the liquid crystal panel 110, and the upper cover 146 is combined with the lower cover 140 and the guide panel 142, thereby providing a liquid crystal panel 110 and a backlight. The liquid crystal display device is assembled to complete the assembly.

Though not shown in the figure, a plurality of gate lines and data lines are vertically and horizontally arranged on the first substrate 101 to define a plurality of pixel regions, and a thin film transistor serving as a switching element is formed in each pixel region A pixel electrode formed on the pixel region is formed. The thin film transistor includes a gate electrode connected to a gate line, a semiconductor layer formed by stacking amorphous silicon or the like on the gate electrode, and 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 102 includes a color filter composed of a plurality of sub-color filters embodying colors of red (R), green (G) and blue (B) And a black matrix for blocking light passing through the liquid crystal layer.

The first substrate 101 and the second substrate 102 constituted as described above are adhered to each other by a sealant (not shown) formed on the periphery of the image display region to constitute a liquid crystal panel, and the first substrate 101 (Not shown) formed on the first substrate 101 or the second substrate 102. As shown in FIG. In this case, since the area of the first substrate 101 is larger than that of the second substrate 120, a pad region in which the first substrate 101 extends a predetermined region from the second substrate 102 is formed. One end region of the flexible substrate 132 is attached.

A liquid crystal display device according to the present invention having the above configuration will be described in more detail with reference to FIG. 4.

As shown in FIG. 4, the pad 131 is formed on the guide panel 142, and the liquid crystal panel 110 is placed thereon. In this case, the guide panel 142 is coupled to the lower cover 140 and the upper cover 146 to a light guide plate 135 from the first region 142a and the first region 142a to assemble the liquid crystal display device. The second region 142b protrudes to place the liquid crystal panel 110 on an upper surface thereof.

Since the top surface of the second region 142b of the guide panel 142 is at the same level as the top surface of the optical sheet 138, the pad 131 is formed on the top surface of the guide panel 142 and the optical sheet 138. The liquid crystal panel 110 is disposed on an upper surface of the liquid crystal panel 110.

As shown in the drawing, since the first polarizing plate 103 and the second polarizing plate 104 are attached to the first substrate 101 and the second substrate 102, the liquid crystal panel 110 is a guide panel 142. When supported by), the pad 131 is in contact with the first polarizing plate 103.

The guide panel 142 is made of a plastic material, but may be formed of another material. The light guide plate 135 is for guiding the light input from the LED 134 to the liquid crystal panel 110 through one side or both sides, and has a good light transmittance in the visible light region such as PMMA (Polymethylmethacrylate) and good mechanical properties. And chemically resistant materials. The light guide plate 135 is formed in a rectangular shape, and although not shown in the drawing, the light guide plate 135 is input through a side surface to scatter light guided therein to supply light of uniform brightness to the liquid crystal panel 110. For example, a pattern of a predetermined shape is formed on the upper surface and / or the lower surface to scatter light. Such a pattern is formed in an intaglio hemisphere or an intaglio ellipsoid, and the arrangement of the patterns may be arranged in a circle, a triangle, or a polygon, and the size and spacing of the pattern may be variously formed. In other words, shapes such as the shape and size of the pattern may also be used in the driving mode of the liquid crystal panel, the width of the liquid crystal panel, the material of the light guide plate 135, the thickness of the light guide plate 135, the type of light source that irradiates light to the light guide plate 135, and the like. It is designed in consideration of various factors.

The cutout 135a is formed to have a predetermined width along both sides of the light guide plate 135. In this case, the cutout 135a may be formed in an area where the pattern is not formed to prevent unevenness of luminance generated by cutting the pattern.

In addition, the cutout 135a may be formed in a region where the pattern of the light guide plate 135 is formed. In this case, the pattern may be formed on the surface of the light guide plate 135 on the cutout 135a of the light guide plate 135 to which the double-sided tape 132 is attached. At this time, since the thickness of the light guide plate 135 in the region formed in the cutout 135 and the thickness of the light guide plate 135 in the other region are different, the shape and density of the pattern formed on the surface of the upper portion of the cutout 135a are different. It will be designed differently from the shape and density of the area. As such, when a pattern is formed on the surface of the light guide plate 135 above the cutout 135a, the thickness of the cutout 135a is a gap between the reflecting plate 136 and the second region 140b of the guide panel 142. Is the same as Accordingly, the level of the light guide plate 135 above the cutout 135a and the lower surface of the second region 140b of the guide panel 142 is the same, so that the double-sided tape 132 is lower than the guide panel 142. And the upper surface of the double-sided tape 132 is attached to the lower surface of the second region 140b of the guide panel 142 and the surface of the light guide plate 135 on the upper portion of the cutout 135a when the cutout 135a is positioned. In addition, the lower surface of the double-sided tape 132 is attached to the reflective plate 136 and the reflective plate 136 is attached to the lower surface of the guide panel 142 and the surface of the light guide plate 135 above the cutout 135a. Fix it.

As shown in FIG. 3, the cutout 135a is formed on the same surface as the coupling groove 135b to remove a portion of the defect groove 135b formed on both side surfaces of the light guide plate 135, thereby coupling the coupling groove 135b. Reduces the length of

The coupling groove 135b causes a non-uniform brightness of the light when the light is incident from a light source such as the LED 134 to supply the light to the liquid crystal panel 110. That is, since light incident by the plurality of coupling grooves 135b formed on both side surfaces of the light guide plate 135 is scattered and supplied to the liquid crystal panel 110, the luminance difference due to light scattering in the coupling groove 135b is displayed on the screen. Will occur. However, in the present invention, since a portion of the coupling groove 135b is removed due to the formation of the cutout 135a, the degree of light scattering by the coupling groove 135b can be reduced, and thus, the coupling groove 135b Luminance unevenness can be minimized.

Conventionally, the entire double-sided tape 132 is attached to the lower surface of the second area 140b of the guide panel 142, whereas in the present invention, only a portion of the double-sided tape 132 is the second area 140b of the guide panel 142. Since it is attached to the lower surface and attached to the surface of the light guide plate 135 on the cutout 135a of the remaining double-sided tape 132, the adhesive area with the double-sided tape 132 of the guide panel 142 is reduced.

5 is a partially enlarged view of a region to which the double-sided tape 132 of FIG. 4 is attached, and illustrates a bonding structure between the guide panel 142 and the light guide plate 135 and the double-sided tape 132.

As illustrated in FIG. 5, a double-sided tape 132 is disposed along both sides of the reflective plate 136 on the reflective plate 136 disposed on the lower cover, so that a portion of the double-sided tape 132 is formed of the guide panel 142. It is attached to the lower surface of two area | region 140b. On the other hand, the lower side of the light guide plate 135 is cut to a predetermined width and height to form a cutout 135a facing the reflecting plate 136.

The double-sided tape 132 extends to the cutout portion 135a of the light guide plate 135 so that a part of the upper surface is attached to the light guide plate 135 surface of the cutout portion 135a. At this time, the length of the double-sided tape 132 is equal to or slightly smaller than the length of the side of the light guide plate 135 and its width a1 is about 0.6 mm as in the prior art. In addition, the tolerance a2 with the guide panel 142 and the tolerance a3 with the light guide plate 135 generated when assembling the liquid crystal display device are 0.15 mm (a2 = a3 = 0.15 mm), which is the same as the conventional tolerance. Do.

Therefore, the attachment width of the double-sided tape 132 attached to the guide panel 142 decreases by the attachment width of the double-sided tape 132 attached to the light guide plate 135 of the cutout 135a. Since the size of the panel 142 can be reduced, the size of the bezel on which the guide panel 142 is disposed can be minimized.

At this time, since the attachment area to the guide panel 142 and the light guide plate 135 attached by the double-sided tape 132 is similar to that of the conventional double-sided tape 132 (of course, it is attached by the distance between the guide panel and the light guide plate). Although the area is reduced, this gap is negligibly small), and the adhesive force between the reflecting plate 136 and the guide panel 142 and the light guide plate 135 by the double-sided tape 132 is attached only to the guide panel 142. It is almost the same as the adhesive force, and thus it is possible to firmly fix the reflecting plate 136.

6 is a diagram illustrating a structure of a liquid crystal display device according to another exemplary embodiment of the present invention.

The structure of the liquid crystal display device shown in FIG. 6 is almost similar in structure to the liquid crystal display device shown in FIG. 4. Therefore, description of the similar structure will be omitted and only the other structure will be described.

As shown in FIG. 6, in the structure of this embodiment, the cutout 235a is formed on the lower surface of the light guide plate 235 to have a predetermined width along both sides of the light guide plate 235, and the double-sided tape 232 is a guide panel ( A portion of 242 extends to the cutout 235a formed in the light guide plate 235 to attach the reflecting plate 236 to the bottom surface of the guide panel 242 and the surface of the light guide plate 235 of the cutout 235a.

The guide panel 242 is formed in a quadrangular shape, and a pad 231 is attached to an upper portion thereof, and a liquid crystal panel 210 is positioned thereon. The guide panel shown in FIG. 4 is a first region coupled to the lower cover and the upper cover and a second region to support the liquid crystal panel, so that the region coupled to the lower cover and the upper cover and the region where the liquid crystal panel is supported are separated. In this embodiment, the guide panel 242 is formed in a rectangular shape so that the liquid crystal panel 210 is supported on the upper surface of the quadrangle and the lower cover 240 and the upper cover 246 are coupled to the side surface.

As such, in this embodiment, the cutout 235a is formed in the light guide plate 235 to attach a portion of the double-sided tape 236 to the light guide plate surface of the cutout 235a to reduce the area of the guide panel 242. Further, by simplifying the structure of the guide panel 242 in a quadrangular shape, the size of the guide panel 242 can be further reduced, thereby minimizing the bezel.

In the above detailed description, a liquid crystal display device having a specific structure is disclosed, but the present invention is not limited to this specific structure. The gist of the present invention is to reduce the size of the guide panel 242 to minimize the bezel to enhance the appearance. To this end, in the present invention, the reflective plate is attached to the guide panel and the light guide plate by cutting a part of the light guide plate and disposing a double-sided tape in this area.

Therefore, in the present invention, any structure of the liquid crystal display device may be applied as long as the light guide plate may be cut to arrange the double-sided tape in the cut area. That is, the present invention may be applied to a backlight unit and a liquid crystal display device having various structures known in the art, as long as the light guide plate may be cut to arrange the double-sided tape in the cut region.

110: liquid crystal panel 132: double-sided tape
135 light guide plate 135a incision
136: reflector 140: lower cover
142: guide panel 146: top cover
138: optical sheet

Claims (10)

A liquid crystal panel in which an image is implemented;
A light source for supplying light to the liquid crystal panel;
A light guide plate for guiding light input from the light source to a liquid crystal panel;
Cutouts formed on both sides of a lower surface of the light guide plate;
A reflector disposed under the light guide plate to reflect light output from the light guide plate back to the light guide plate;
A guide panel on which a liquid crystal panel is placed;
A double-sided tape extending from the guide panel to the cutout of the light guide plate, one surface of which is attached to the reflecting plate and the other surface of which is attached to the lower surface of the guide panel and the light guide plate surface of the cutout, thereby fixing the reflecting plate to the guide panel and the light guide plate;
A lower cover accommodating the light guide plate and the guide panel; And
And an upper cover coupled to the lower cover and the guide panel. The liquid crystal display of claim 1, wherein the light source is an LED or a fluorescent lamp disposed on a side of the light guide plate. The method of claim 1, wherein the guide panel,
A first area coupled to the lower cover and the upper cover; And
And a second area protruding from the first area toward the light guide plate, the second area having a liquid crystal panel supported on an upper surface thereof and a double-sided tape attached to the lower surface thereof. The liquid crystal display device according to claim 1, wherein the guide panel is formed in a quadrangular shape so that the upper surface of the guide panel is supported, the lower surface of the guide panel is attached, and the lower cover and the upper cover are assembled to the side surface. The method of claim 1,
Coupling grooves formed at both sides of the light guide plate from an upper side to a lower side; And
And a coupling protrusion formed on both inner side surfaces of the lower cover from an upper side to a lower side to engage with the coupling groove to fix the light guide plate and the lower cover. The method of claim 1,
Coupling protrusions formed at both sides of the light guide plate from an upper side to a lower side; And
And a coupling groove formed on both inner side surfaces of the lower cover from an upper side to a lower side and coupled to the coupling protrusion to fix the light guide plate and the lower cover. The liquid crystal display device according to claim 5 or 6, wherein the cutout is formed on the same surface as the coupling protrusion or the coupling groove. The liquid crystal display device of claim 1, further comprising a pattern formed on at least a lower surface of the light guide plate to scatter light incident on the lower surface of the light guide plate. The liquid crystal display device of claim 8, wherein the cutout is formed in a region where a pattern is not formed. The liquid crystal display device of claim 8, wherein a pattern is formed on a surface of the light guide plate above the cutout.

Images