KR20130027204A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: A liquid crystal display device is provided to remove an extra area for the screw combination of a main support and a bottom cover while preventing the movement of a light guide plate by providing a screw combination area for assembling and combining the main support and the bottom cover with each other. CONSTITUTION: A main support(130) includes a vertical unit(131) and a protruding unit(133). The protruding unit includes a first screw hole(135). A light guide plate(123) includes a first guide groove. A bottom cover(150) includes a second screw hole(155). A fixing unit(200) is inserted into the first guide groove. The fixing unit includes a third screw hole(230). A fixing member is inserted into the second screw hole through the first and the third screw holes.

Description

[0001] The present invention relates to a liquid crystal display device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device having a light weight, a thin shape, and a narrow bezel while preventing the light guide plate from flowing.

Liquid crystal display devices (LCDs), which are used for TVs and monitors due to their high contrast ratio and are advantageous for displaying moving images, are characterized by optical anisotropy and polarization of liquid crystals. The principle of image implementation by

Such a liquid crystal display is an essential component of a liquid crystal panel bonded through a liquid crystal layer between two side-by-side substrates, and realizes a difference in transmittance by changing an arrangement direction of liquid crystal molecules with an electric field in the liquid crystal panel. do.

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

The general backlight unit is classified into an edge type and a direct type according to the arrangement of the lamps. The edge type has a structure in which one or a pair of lamps are disposed at one side of the light guide plate, or two or Two pairs of lamps have a structure arranged on each side of the light guide plate, and the direct type has a structure in which several lamps are arranged under the optical sheet.

Here, the edge type is easier to manufacture than the direct type, and has the advantage of being lighter in weight and lower power consumption than the direct type.

1 is a cross-sectional view of an LCD including an edge type backlight unit.

As illustrated, a general edge type liquid crystal display device includes a liquid crystal panel 10, a backlight unit 20, a support main 30, a cover bottom 50, and a top cover 40.

The liquid crystal panel 10 is a part that plays a key role in image expression and is composed of first and second substrates 12 and 14 bonded to each other with a liquid crystal layer interposed therebetween.

The backlight unit 20 is provided behind the liquid crystal panel 10.

The backlight unit 20 includes an LED assembly 29 arranged along at least one edge length direction of the support main 30, a white or silver reflecting plate 25 seated on the cover bottom 50, and a reflecting plate ( A light guide plate 23 seated on 25 and a plurality of optical sheets 21 interposed thereon.

At this time, the LED assembly 29 is configured on one side of the light guide plate 23, and a plurality of LEDs (29a), LED PCB (printed circuit board: 29b, hereinafter, PCB) is mounted on which the plurality of LEDs (29a) is mounted It includes.

The liquid crystal panel 10 and the backlight unit 20 have a top cover 40 surrounding the top edge of the liquid crystal panel 10 and a back surface of the backlight unit 20 in a state where the edges are surrounded by the support main 30 having a rectangular frame shape. Cover cover 50 to cover each is coupled in front and rear are integrated through the support main 30 as a medium.

And reference numerals 19a and 19b denote polarizing plates attached to the front and back surfaces of the liquid crystal panel 10 to control the polarization direction of light, respectively.

Meanwhile, in the liquid crystal display device configured as described above, it is important to fix the LED assembly 29, the light guide plate 23, and the optical sheet 21 of the backlight unit 20 so as not to flow.

In particular, when the light guide plate 23 flows due to external shock or vibration, breakage of a plurality of LEDs 29a of the LED assembly 29 occurs, or optical characteristics of the liquid crystal display are changed, thereby deteriorating image quality. It can be caused.

Therefore, in order to solve such a problem in recent years, a guide groove (not shown) is formed in a part of the edge of the light guide plate 23, and the cover bottom 50 corresponds to the guide groove (not shown) of the light guide plate 23. By forming a plurality of bosses (not shown), the bosses (not shown) are inserted into the guide grooves (not shown), thereby preventing the light guide plate 23 from flowing.

At this time, the plurality of bosses are located along the non-display area of the liquid crystal display.

On the other hand, in recent years, such a liquid crystal display device has been widely used as a portable computer, a desktop computer monitor, and a wall-mounted television, and researches to have a massive weight and volume with a large display area It is actively proceeding.

Accordingly, by removing the top cover to reduce the components constituting the liquid crystal display device, the movement to provide a lightweight and thin liquid crystal display device is actively progressing.

In addition, in recent years, liquid crystal displays have been required for narrow bezels in which the display area is wider and the bezel area, which is a non-display area other than the display area, is formed as small as possible.

However, the top cover 30, the support main 40, and the cover bottom 50 for modularizing the liquid crystal panel and the backlight unit are integrally assembled with each other through the screw 60. As there is a need for the region of the LCD, there is a limit to reducing the width of the bezel of the LCD.

The present invention is to solve the above problems, and has a first object to have a lightweight, thin and narrow bezel at the same time to prevent the flow of the light guide plate.

In addition, the second object is to reduce the process cost and to prevent cracking of the light guide plate.

In order to achieve the above object, the present invention provides a vertical portion and a support main portion provided with an inner portion of the vertical portion, the support main portion provided with a first screw hole in the projection portion; A liquid crystal panel seated on the protrusions; An optical sheet disposed below the liquid crystal panel; A light guide plate positioned below the optical sheet and including a first guide groove at an edge of the optical sheet except for a light incident surface; An LED assembly positioned along the light incident surface of the light guide plate; A cover bottom positioned below the light guide plate and having a second screw hole corresponding to the first screw hole in a horizontal plane; Located on the horizontal plane, and includes a fixing portion inserted into the first guide groove, the fixing portion is provided with a third screw hole corresponding to the first and second screw holes, the fixing member is the first The support main body, the cover bottom and the fixing part are integrally assembled and fastened by being inserted into the second screw hole through the first and third screw holes from the front of the screw hole.

In this case, the fixing part is made of a support part and a light guide plate projecting from the support part in a smaller size than the support part, the light guide plate is seated on the support part, the first guide groove surrounds the outer surface of the light guide plate guide, the fixing The member is a shaft and a screw having a head at the end of the shaft, wherein the first screw hole of the support main consists of a first portion into which the shaft is inserted and a second portion into which the head is inserted, and the head is external. Is not exposed.

The fixing part is positioned on a stepped portion of which the horizontal surface of the cover bottom protrudes inwardly, and a tab burr is formed on a rear surface of the stepped bottom, and the other end of the fixing member is formed on the rear surface of the cover bottom. The exposure plate is not exposed, and a reflecting plate seated on the support part is located on the rear surface of the light guide plate, and a second guide groove corresponding to the first guide groove is formed at an edge of the reflecting plate.

In addition, a plurality of driving circuits are mounted in the spaced space between the reflective plate and the horizontal surface of the cover bottom, and the liquid crystal panel is surrounded by an edge by the support main, and the liquid crystal panel is surrounded by an upper edge through a top cover. Lose.

As described above, by forming a screw hole in the fixing portion provided to prevent the flow of the light guide plate according to the present invention, thereby providing a screw fastening area for assembling and fastening the support main and the cover bottom, thereby, While preventing flow, separate areas for screwing the support main and the cover bottom can be removed, thereby reducing the width of the bezel of the liquid crystal display.

Therefore, the LED of the LED assembly may be damaged due to the flow of the light guide plate, or the optical characteristics of the liquid crystal display may be changed, thereby preventing the problem of deterioration in image quality. In addition, it is possible to delete a separate fixing member for fixing the fixing portion to the cover bottom, there is an effect that can reduce the process cost.

In addition, since the shape of the light guide plate guide and the first guide groove are formed to correspond, it is possible to prevent the crack (crack) in the first guide groove of the light guide plate compared to the conventional, which prevented the flow of the light guide plate through the boss (boss). It has an effect.

1 is a cross-sectional view of an LCD including an edge type backlight unit.
2 is an exploded perspective view schematically illustrating a liquid crystal display according to an exemplary embodiment of the present invention.
Figure 3a is an exploded perspective view schematically showing the assembly and fastening process of the support main and the cover bottom according to an embodiment of the present invention.
FIG. 3B is an exploded perspective view showing the back of FIG. 3A;
FIG. 4 is a schematic cross-sectional view of a portion of the modular LCD of FIG. 2. FIG.

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

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

As illustrated, the liquid crystal display device includes a liquid crystal panel 110 and a backlight unit 120, and includes a support main 130 and a cover bottom 150 for modularizing the liquid crystal panel 110 and the backlight unit 120. It includes.

Looking at each of them in more detail, the liquid crystal panel 110 plays a key role in image expression, and the first substrate 112 and the second substrate 114 bonded to each other with the liquid crystal layer interposed therebetween. Include.

In this case, although not shown in the drawing, a plurality of gate lines and data lines intersect each other and a pixel is defined on an inner surface of the first substrate 112, which is commonly referred to as a lower substrate or an array substrate, and a thin film transistor is formed at each intersection point. (thin film transistor: TFT) is provided and is connected one-to-one with the transparent pixel electrode formed in each pixel.

On the inner surface of the second substrate 114 called an upper substrate or a color filter substrate, color filters of red (R), green (G), and blue (B) And a black matrix for covering the gate lines, the data lines, and the thin film transistors. In addition, color filters of red (R), green (G), and blue (B) colors and transparent common electrodes covering the black matrix are provided.

In addition, polarizing plates (not shown) for selectively transmitting only specific light are attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

Along the at least one edge of the liquid crystal panel 110, the printed circuit board 117 is connected through a connecting member 116, such as a flexible circuit board or a tape carrier package (TCP), in the modularization process. The side surface of the support main 130 or the cover bottom 150 is properly folded to be in close contact.

When the thin film transistor selected for each gate line is turned on by the on / off signal of the gate driver circuit, the liquid crystal panel 110 transmits the signal voltage of the data driver circuit to the corresponding pixel electrode through the data line. The arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode, indicating a difference in transmittance.

The back of the liquid crystal panel 110 is provided with a backlight unit 120 for supplying light, so that the difference in transmittance represented by the liquid crystal panel 110 is expressed to the outside.

The backlight unit 120 includes an LED assembly 129, a white or silver reflecting plate 125, a light guide plate 123 seated on the reflecting plate 125, and an optical sheet 121 interposed thereon. .

The LED assembly 129 is positioned at one side of the light guide plate 123 to face the light incident surface of the light guide plate 123, and the plurality of LEDs 129a and the plurality of LEDs 129a are mounted at a predetermined interval apart from each other. ).

At this time, the plurality of LEDs 129a include LED chips (not shown) which emit all of the colors of RGB or emit white, and emit white light toward the light incident surface of the light guide plate 123.

In addition, the plurality of LEDs 129a emit light having a color of red (R), green (G), and blue (B), respectively, and by lighting the plurality of RGB LEDs (129a) at once, white light by color mixing is generated. It can also be implemented.

The light guide plate 123 to which light emitted from the plurality of LEDs 129a of the LED assembly 129 is incident is performed by the light guide plate 123 while the light incident from the LED 129a travels inside the light guide plate 123 by a plurality of total reflections. Spread evenly over a wide area of to provide a surface light source to the liquid crystal panel (110).

The light guide plate 123 may include a pattern of a specific pattern on the back surface to supply a uniform surface light source.

Here, the pattern may be configured in various ways, such as an elliptical pattern, a polygon pattern, a hologram pattern, and the like to guide the light incident into the light guide plate 123. The pattern is formed on the lower surface of the light guide plate 123 by a printing method or an injection method.

In particular, the light guide plate 123 of the present invention is characterized in that a plurality of first guide grooves 123a are formed at the edge except for the light incident surface to which the LED assembly 129 is attached.

That is, the light guide plate 123 of the present invention is fixed in the liquid crystal display device modularized through the first guide groove 123a so that the external light guide plate 123 is accommodated in the cover bottom 150. Or shaking to prevent the light guide plate 123 from flowing in the horizontal or vertical direction.

Through this, the plurality of LEDs 129a may be prevented from being damaged by the flow of the light guide plate 123.

The reflection plate 125 is disposed on the back surface of the light guide plate 123 and reflects light passing through the back surface of the light guide plate 123 toward the liquid crystal panel 110 to improve the brightness of light.

In this case, the second guide groove 125a is formed at the edge of the reflecting plate 125 to correspond to the first guide groove 123a of the light guide plate 123.

The optical sheet 121 on the light guide plate 123 includes a diffusion sheet and at least one light condensing sheet and diffuses or condenses the light passing through the light guide plate 123 to provide a more uniform surface light source to the liquid crystal panel 110 Let it enter.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the support main 130 and the cover bottom 150, and the cover bottom 150 is in contact with the rear surface of the backlight unit 120. Its edge consists of a side 153 which is vertically bent upwardly.

The cover bottom 150 is mounted with the liquid crystal panel 110 and the backlight unit 120, and the cover bottom 150 is the basis for assembling the entire apparatus of the LCD.

And, the support main 130 of the rectangular frame shape that is seated on the cover bottom 150 and surrounds the edge of the liquid crystal panel 110 is coupled with the cover bottom 150.

At this time, the support main 130 is composed of a vertical portion 131 that surrounds the edge of the liquid crystal panel 110, the protrusion 133 is provided inside the vertical portion 131, the liquid crystal panel 110 is double-sided It is seated and attached on the protrusion 133 through an adhesive material (not shown) such as a tape.

Here, the support main 130 and the cover bottom 150 are integrally coupled through a so-called front mounting structure assembled through the screw 160, that is, the support main 130 and the cover bottom 150 are integrated. In order to combine the use of the screw 160 is inserted into the cover bottom 150 through the support main 130, for this purpose, the support main 130 and the cover bottom 150, respectively at predetermined positions corresponding to each other. The first and second screw holes 135 (not shown) having a female screw thread penetrate the inner circumferential surface thereof.

In this case, the screw 160 includes a shaft 161 and a head 163 provided at an end thereof similarly to the shape of a general screw. At this time, male threads corresponding to the female threads formed on the inner surfaces of the first and second screw holes 135 (not shown) are formed along the outer surface of the shaft 161.

Therefore, the screw 160 penetrates through the first screw hole 135 of the support main 130 from the end of the shaft 161 and is inserted into the second screw hole (not shown) of the cover bottom 150. 130 and the cover bottom 150 is integrally combined.

The liquid crystal display according to the exemplary embodiment of the present invention has a structure in which the top cover (not shown) is removed, and thus the liquid crystal display may be light and thin by removing the top cover (not shown), and the process may be simplified. Has an effect.

In addition, due to the removal of the top cover (not shown) made of a metal material, it is possible to reduce the process cost.

In this case, a fixing part including a light guide plate guide 210 inserted into the guide groove 123a of the light guide plate 123 on the horizontal surface 151 of the cover bottom 150 corresponding to the guide groove 123a of the light guide plate 123 ( 200) is formed.

Therefore, the light guide plate 123 is fixed as the light guide plate guide 210 of the fixing part 200 is inserted into the guide groove 123a of the light guide plate 123.

In particular, the fixing part 200 is characterized in that the third screw hole 230 corresponding to the first and second screw holes 135 (not shown) of the support main 130 and the cover bottom 150 is formed. .

That is, in the process in which the support main 130 and the cover bottom 150 are assembled and fastened to each other through the screw 160, the screw 160 may have the first to third screw holes 135, from the front of the support main 130. Not shown, penetrating through 230, the support main 130 and the cover bottom 150 is integrally combined.

At this time, a female thread corresponding to the male thread of the screw 160 is formed on the inner circumferential surface of the third screw hole 230.

Therefore, the liquid crystal display of the present invention is fastened to the screw 160 for assembling and fastening the support main 130 and the cover bottom 150 through the fixing part 200 provided to prevent the flow of the light guide plate 123. By providing the area, the support main 130 and the cover bottom 150 can be removed from the separate area for fastening the screw 160 in the process of assembling and fastening with each other through the screw 160, to implement a narrow bezel Can be.

In this case, the support main 130 may be referred to as a guide panel or a main support, a mold frame, and the cover bottom 150 may be referred to as a bottom cover or a lower cover.

The liquid crystal display described above can prevent the flow of the light guide plate 123 even when an external impact or shake occurs, so that the LED 129a of the LED assembly 129 is damaged by the flow of the light guide plate 123. In addition, the optical characteristics of the liquid crystal display may be changed to prevent a problem of deterioration of image quality.

In addition, in the process of assembling and fastening the support main 130 and the cover bottom 150 through the screw 160, a separate area for fastening the screw 160 may be deleted to provide a liquid crystal display having a narrow bezel. can do.

3A is an exploded perspective view schematically illustrating a process of assembling and fastening a support main and a cover bottom according to an embodiment of the present invention, and FIG. 3B is an exploded perspective view illustrating the rear surface of FIG. 3A.

As shown, the fixing part 200 is located on the horizontal surface 151 close to the side surface 153 of the cover bottom 150, and the fixing part 200 supports the reflecting plate 125 and the light guide plate 123. And a light guide plate 210.

Looking at this in more detail, the light guide plate guide 210 of the fixing part 200 is formed to protrude from the support portion 220 in a smaller size than the support portion 220, in this case, the support portion exposed to the periphery of the light guide plate guide 210 The reflective plate 125 and the light guide plate 123 are seated and supported on the 220.

Therefore, the reflector plate 125 is positioned at a predetermined interval from the horizontal plane 151 of the cover bottom 150 to correspond to the height of the support part 220, and the reflecting plate 125 and the horizontal plane 151 of the cover bottom 150. A plurality of driving circuits (not shown) may be mounted in the separation space B (see FIG. 4).

Here, the support 220 can be deleted. That is, the light guide plate 210 may be formed to include the height of the support 210.

In this case, the fixing part 200 is positioned as close to the side surface 153 of the cover bottom 150 as possible, thereby reducing the bezel width of the liquid crystal display device, which is a non-display area of the liquid crystal display device on which the fixing part 200 is located. It is desirable to.

The first guide groove 123a into which the light guide plate guide 210 is inserted is formed at the edge of the light guide plate 123, and the first guide groove 123a has a predetermined width and depth from the edge of the light guide plate 123. It is recessed and formed.

That is, the first guide groove 123a of the light guide plate 123 is formed to surround the outer surface of the light guide plate guide 210 of the fixing part 200.

Therefore, when the light guide plate guide 210 of the fixing part 200 is inserted into the first guide groove 123a of the light guide plate 123, even if an external impact or shaking occurs, the light guide plate 123 is fixed to the fixing part 200. Flow is prevented by the light guide plate 210 of the. As a result, the LED (129a of FIG. 2) may not be damaged due to the flow of the light guide plate 123, and the optical characteristics of the liquid crystal display may be changed to prevent the problem of deterioration in image quality.

In the liquid crystal display of the present invention, the light guide plate 123 can be more stably fixed even when the modular liquid crystal display is dropped at a certain height in the process of performing a mechanical reliability test, thereby providing a more stable It will improve the mechanical reliability.

In addition, the structure of the light guide plate guide 210 and the first guide groove 123a of the present invention is the first of the light guide plate 123 compared to the conventional, which prevented the flow of the light guide plate 123 through a boss (not shown). It is possible to prevent the cracks in the guide groove 123a.

That is, the existing boss (not shown) is formed in a cylindrical shape, the guide groove (not shown) formed in the light guide plate 123 has a width corresponding to the diameter of the boss (not shown), but the diameter of the boss (not shown) It is formed to have a long depth in comparison. The boss (not shown) and the guide groove (not shown) having such a structure cause a collision between the boss (not shown) and the guide groove (not shown) when an impact or shaking is applied from the outside. Therefore, a crack occurs in the guide groove (not shown).

On the contrary, the first guide groove 123a of the light guide plate 123 of the present invention is formed to surround the outer surface of the light guide plate guide 210 of the fixing part 200, thereby preventing the light guide plate 123 from flowing. The shape of the 210 and the first guide groove 123a correspond to each other.

Therefore, the LCD of the present invention does not collide with the light guide plate guide 210 and the first guide groove 123a even when an impact or shake is applied from the outside, thereby causing cracks in the first guide groove 123a. This can be prevented.

In addition, a second guide groove 125a into which the light guide plate guide 210 of the fixing part 200 is inserted is formed at an edge of the reflecting plate 125 to correspond to the first guide groove 123a of the light guide plate 123. The two guide grooves 125a may also be recessed and formed to have a predetermined width and depth from the edge of the reflector plate 125 to surround the outer surface of the light guide plate 210.

In this case, the reflector plate 125 is disposed on the rear surface of the light guide plate 123 and is formed to be wider than the size of the light guide plate 123 in order to reflect light passing through the rear surface of the light guide plate 123. In this case, the depth and width of the second guide groove 125a are larger than that of the first guide groove 123a so that the second guide groove 125a of the reflector plate 125 may further wrap the light guide plate guide 210. It is desirable to be.

In addition, the support main 130 positioned on the light guide plate 123 and covering the edge of the liquid crystal panel 110 has a first screw hole 135 formed on the protrusion 133 protruding inwardly of the vertical part 131. Is formed.

Particularly, in the liquid crystal display of the present invention, the second screw hole 155 is formed on the horizontal surface 151 of the cover bottom 150 at a position corresponding to the first screw hole 135 of the support main 130. The fixing part 200 has a third screw hole 230 corresponding to the first and second screw holes 135 and 155 through the light guide plate guide 210 and the support part 220.

In this case, female threads corresponding to male threads formed on the shaft 161 of the screw 160 are formed in the inner circumferential surface of the first to third screw holes 135, 155, and 230.

Accordingly, the screw 160 passes through the first to third screw holes 135, 155, and 230 from the front of the support main 130, thereby supporting the support main 130, the fixing part 200, and the cover bottom 150. It is assembled and fastened integrally.

That is, the liquid crystal display of the present invention does not separately fix the fixing part 200 to prevent the flow of the light guide plate 123 on the cover bottom 150, and also the support main 130 and the cover bottom 150 separately. Without assembling and fastening, they are assembled and fastened together in one piece.

Therefore, the fixing part 200 provided to prevent the flow of the light guide plate 123 provides an area for fastening the screw 160 of the support main 130 and the cover bottom 150. As a result, in the process of assembling and fastening the support main 130 and the cover bottom 150, a separate area for fastening the screw 160 may be deleted, thereby reducing the width of the bezel of the LCD.

In addition, a separate fixing member (not shown) for fixing the fixing part 200 to the cover bottom 150 may be deleted, thereby reducing the process cost.

In this case, the first screw hole 135 of the support main 130 is formed so that the first portion 135a into which the shaft 161 of the screw 160 is inserted and the head 163 of the screw 160 are inserted into the first screw hole 135. It may be divided into a second portion 135b having a diameter larger than the first portion 135a.

As a result, the bezel area of the LCD may be further reduced.

In addition, the horizontal surface 151 of the cover bottom 150 is formed so that a part protrudes inward to form the step 157, and the fixing part 200 is positioned on the step 157 of the cover bottom 150. desirable.

This is because the thickness of the cover bottom 150 in order to implement a lightweight and thin in recent years, the screw 160 in the process of assembling and fastening the support main 130 and the cover bottom 150 of the cover bottom 150 A tab burr 159 is formed on the back surface of the cover bottom 150 to prevent the protrusion from being sharply protruded to the back surface, in order to prevent the tab bur 159 from protruding to the back surface of the cover bottom 150. At this time, it is preferable that the height of the step 157 corresponds to the height of the tab bur 159.

This allows the liquid crystal display to have a minimum thickness.

4 is a cross-sectional view schematically illustrating a portion of the modularized liquid crystal display of FIG. 2.

As illustrated, the optical sheet 121 is stacked on the reflective plate 125, the light guide plate 123, and the LED assembly (129 of FIG. 2) provided on one side of the light guide plate 123 and the light guide plate 123. The backlight unit 120 is formed.

A liquid crystal panel 110 in which a liquid crystal layer (not shown) is interposed between the first and second substrates 112 and 114 and the first and second substrates 112 and 114 are disposed on the backlight unit 120, And 114 are attached with polarizing plates 119a and 119b selectively transmitting only specific light.

The liquid crystal panel 110 has an edge surrounded by the vertical portion 131 of the support main 130, and the liquid crystal panel 110 is supported by being seated on the protrusion 133 protruding into the vertical portion 131. .

The liquid crystal panel 110 surrounded by the support main 130 and the backlight unit 120 positioned on the rear surface of the liquid crystal panel 110 are horizontal to the inside of the side surface 153 of the cover bottom 150. It is seated on the phase.

In addition, the fixing part 200 is positioned on the horizontal surface 151 of the cover bottom 150 to be in close contact with the side surface 153 of the cover bottom 150.

In this case, the reflector plate 125 and the light guide plate 123 are seated on the support part 220 of the fixing part 200, and are disposed in the space B between the reflector plate 125 and the horizontal plane 151 of the cover bottom 150. A plurality of driving circuits (not shown) may be mounted.

The light guide plate guide 210 of the fixing part 200 is inserted into the first guide groove (123a in FIG. 3B) of the light guide plate 123 and the second guide groove (125a in FIG. 3B) of the reflector plate 125, thereby providing a light guide plate. 123 is fixed in position.

Therefore, even when an external shock or shake occurs, the light guide plate 123 is prevented from flowing by the light guide plate guide 210 of the fixing part 200. As a result, the LED (129a of FIG. 2) may not be damaged due to the flow of the light guide plate 123, and the optical characteristics of the liquid crystal display may be changed to prevent the problem of deterioration in image quality.

In the liquid crystal display of the present invention, the support main 130, the fixing part 200, and the cover bottom 150 are all assembled and fastened integrally through one screw 160.

That is, in the liquid crystal display of the present invention, the screw 160 penetrates through the first screw hole 135 of the support main 130 and the third screw hole 230 of the fixing part 200 to cover the cover bottom 150. By being inserted into the second screw hole 155, both are assembled and fastened in one piece.

Through this, the liquid crystal display of the present invention can delete a separate region for fastening the screw 160 in the process of assembling and fastening the support main 130 and the cover bottom 150, thereby implementing a narrow bezel. .

In addition, a separate fixing member (not shown) for fixing the fixing part 200 to the cover bottom 150 may be deleted, thereby reducing the process cost.

At this time, the head 163 of the screw 160 is inserted into the second portion 135b of the first screw hole 135, and the head 163 of the screw 160 onto the protrusion 133 of the support main 130. ) Is not exposed, so the bezel width of the liquid crystal display can be further reduced.

In addition, the fixing part 200 is located on the stepped 157 of the cover bottom 150, and the tab bur 159 is formed on the back of the cover bottom 150 on which the stepped 157 is formed, so that the back of the cover bottom 150 is formed. As a result, the screw 160 may be prevented from being sharply protruded, and the tab bur 159 may be prevented from protruding to the rear surface of the cover bottom 150.

As described above, the liquid crystal display of the present invention forms a screw hole 230 in the fixing part 200 provided to prevent the flow of the light guide plate 123, the support main 130 and the cover bottom 150 By providing a screw 160 fastening area for assembling and fastening the same, it prevents the flow of the light guide plate 123 and at the same time to remove a separate area for fastening the screw 160 of the support main 130 and the cover bottom 150. The width of the bezel of the liquid crystal display device can be reduced.

Through this, the flow of the light guide plate 123 can be prevented even when an external shock or shake occurs, and the LED of the LED assembly (129 of FIG. 2) is caused by the flow of the light guide plate 123 (129a in FIG. 2). ), Or the optical characteristics of the liquid crystal display device is changed to prevent the problem of deterioration of image quality.

In addition, a separate fixing member (not shown) for fixing the fixing part 200 to the cover bottom 150 may be deleted, thereby reducing the process cost.

In addition, the light guide plate guide 210 of the fixing part 200 and the shape of the first guide groove 123a of the light guide plate 123 correspond to each other, thereby preventing the flow of the light guide plate 123 through a boss (not shown). Compared to the conventional method, cracks may be prevented from being prevented in the first guide groove 123a of the light guide plate 123.

Meanwhile, in the above description, the liquid crystal display device of the present invention has a structure in which the top cover is removed in order to realize light weight and thinness, but an LCD including a top cover is also applicable. Here, the top cover may also be referred to as a case top or a top case.

In addition, the backlight unit 120 having the above-described structure is generally called a side light method, and according to the purpose, a plurality of LEDs (129a of FIG. 2) may be arranged on the PCB (129b of FIG. 2). In addition, a fluorescent lamp may be used instead of the LED assembly (129 of FIG. 2).

When the fluorescent lamp is used, a lamp guide for protecting and guiding the outside of the fluorescent lamp and concentrating light toward the light guide plate 123 may be further included.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

110: liquid crystal panel (112, 114: first and second substrates)
119a and 119b: first and second polarizing plates, 120 backlight unit, 121 optical sheet
123: light guide plate (123a: first guide groove), 125: reflector plate (125a: second guide groove)
130: support main (131: vertical portion, 133: protrusion, 135: first screw hole)
150: cover bottom (151: horizontal surface, 153: side, 155: second screw hole, 157: stepped, 159: tab bur)
160: screw (161: shaft, 163: head)
200: fixing part (210: light guide plate guide, 220: support part, 230: third screw hole)

Claims (7)

A support main portion provided with a vertical portion and a protrusion inwardly of the vertical portion, and having a first screw hole at the protrusion portion;
A liquid crystal panel seated on the protrusions;
An optical sheet disposed below the liquid crystal panel;
A light guide plate positioned below the optical sheet and including a first guide groove at an edge of the optical sheet except for a light incident surface;
An LED assembly positioned along the light incident surface of the light guide plate;
A cover bottom positioned below the light guide plate and having a second screw hole corresponding to the first screw hole in a horizontal plane;
A fixing part positioned on the horizontal surface and inserted into the first guide groove
The fixing part includes a third screw hole corresponding to the first and second screw holes, and the fixing member passes through the first and third screw holes from the front of the first screw hole. 2 is inserted into the screw hole, the support main, the cover bottom and the fixing portion are assembled and fastened integrally.
The method of claim 1,
The fixing part includes a support part and a light guide plate guide projecting from the support part in a smaller size than the support part, wherein the light guide plate is seated on the support part, and the first guide groove surrounds an outer surface of the light guide plate guide.
The method of claim 1,
The fixing member is a screw provided with a head and a shaft at the end of the shaft, the first screw hole of the support main is composed of a first portion into which the shaft is inserted and a second portion into which the head is inserted, the head LCD is not exposed to the outside.
The method of claim 1,
The fixing part is positioned on a stepped portion of the horizontal surface of the cover bottom protruding inwardly, and a tab burr is formed on a rear surface of the stepped bottom so that the other end of the fixing member is not exposed to the rear surface of the cover bottom. Do not use a liquid crystal display device.
The method of claim 2,
And a reflecting plate seated on the support part on a rear surface of the light guide plate, and a second guide groove corresponding to the first guide groove is formed at an edge of the reflecting plate.
The method of claim 5, wherein
And a plurality of driving circuits are mounted in the space between the reflective plate and the horizontal surface of the cover bottom.
The method of claim 1,
The liquid crystal panel has an edge surrounded by the support main, and the liquid crystal panel has an upper edge surrounded by a top cover.

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