KR102150422B1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device, and to a liquid crystal display device capable of preventing contact with a cover shield and a driving circuit element mounted on a printed circuit board in close contact with the cover bottom.
A feature of the present invention is that by forming a support end on the cover shield that is coupled to the rear surface of the cover bottom, it is possible to prevent the cover shield from contacting the driving circuit elements mounted on the printed circuit board even when the cover shield is pressed. . Through this, it is possible to prevent the occurrence of electrical interference of the driving circuit device due to contact between the cover shield made of metal and the driving circuit device, and a wave pattern, etc., is generated on the screen, resulting in deterioration of the display quality of the liquid crystal display device. Can be prevented.

Description

Liquid crystal display device

The present invention relates to a liquid crystal display device, and to a liquid crystal display device capable of preventing contact with a cover shield and a driving circuit element mounted on a printed circuit board in close contact with the cover bottom.

The liquid crystal display device (LCD), which is advantageous for displaying moving images and has a high contrast ratio, is actively used in TVs and monitors. The optical anisotropy and polarization of liquid crystals The principle of image implementation is shown.

Such a liquid crystal display device uses a liquid crystal panel bonded by interposing a liquid crystal layer between two parallel substrates as an essential component, and a difference in transmittance is realized by changing the alignment direction of liquid crystal molecules by 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, and for this purpose, a backlight with a light source is disposed on the back of the liquid crystal panel.

1 is a cross-sectional view of a liquid crystal display device including a general edge type backlight unit using an LED as a light source.

As shown, a liquid crystal display device including a general edge type backlight unit 20 includes a liquid crystal panel 10 and a backlight unit 20, and a guide panel 30 and 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 therebetween.

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

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

The backlight unit 20 is arranged along the longitudinal direction of at least one edge of the guide panel 30, a LED assembly 29 comprising a plurality of LEDs 29a and a PCB 29b on which the LEDs 29a are mounted, and a cover It includes a white or silver reflective plate 25 seated on the bottom 50, a light guide plate 23 seated on the reflective plate 25, and an optical sheet 21 positioned on the upper portion thereof.

The liquid crystal panel 10 and the backlight unit 20 have a top cover 40 surrounding the upper surface of the liquid crystal panel 10 and the back of the backlight unit 20 with the edges surrounded by a rectangular guide panel 30 The cover buttum 50 covering the is coupled at the front and rear sides, and is integrated through the guide panel 30 as a medium.

On the other hand, although not shown in the drawing, a printed circuit board is connected along one edge of the liquid crystal panel 10 through a connecting member such as a flexible circuit board or a tape carrier package (TCP). (50) In order to protect the printed circuit board in close contact with the cover bottom 50, a cover shield is positioned on the rear surface of the cover bottom 50 in order to protect the printed circuit board in close contact with the cover bottom 50.

However, as the cover shield is made of a metal material, it is important to prevent contact with the driving circuit elements mounted on the printed circuit board. Currently, when the cover shield is pressed, the cover shield and the driving circuit elements There is no good means to prevent contact.

Therefore, a wide area between the cover shield and the driving circuit elements is formed. However, if the area between the cover shield and the driving circuit elements is formed wide, a problem that acts as an element that increases the overall thickness of the liquid crystal display may occur. have.

Therefore, research is needed to prevent contact between the cover shield and the driving circuit elements mounted on the printed circuit board even when the cover shield is pressed without increasing the thickness of the liquid crystal display device by the cover shield. to be.

The present invention is to solve the above problems, and the first object is to prevent contact between the cover shield and the driving circuit device mounted on the printed circuit board even when the cover shield is pressed.

In addition, it is a second object to prevent an increase in the thickness of the liquid crystal display device.

In addition, the third object is to improve the rigidity of the cover shield.

In order to achieve the object as described above, the present invention includes a liquid crystal panel to which a printed circuit board is connected through a connection member; A backlight unit positioned under the liquid crystal panel; A cover bottom on which the backlight unit and the liquid crystal panel are mounted; A liquid crystal display device including a cover shield including a support end in close contact with the back surface of the cover bottom and assembled and fastened to the rear surface of the cover bottom so as to surround the printed circuit board in close contact with the cover bottom. to provide.

In this case, the cover shield includes a bottom surface and a side surface in which an edge of the bottom surface is vertically bent upward, and the supporting end is parallel to the first supporting portion and the bottom surface bent vertically upward from the bottom surface. And a second support portion bent vertically from the first support portion, and the second support portion is in close contact with a rear surface of the cover buttum.

In addition, a fixing part including a first fixing end extending from the side surface and a second fixing end vertically bent so as not to face the bottom surface from the first fixing end is formed on the side surface, and the second fixing end is the cover It is in close contact with the rear surface of the butt, the side surface has a first height, the first fixed end has a second height, and the first support part has a third height corresponding to the sum of the first height and the second height Has.

In this case, the printed circuit board and the liquid crystal panel are connected to each other through a plurality of connecting members, and the support ends are positioned to correspond to regions between the plurality of connection members, and the second support part is a central part of the cover shield. It is located corresponding to

In addition, a groove is formed between the support end and the side surface of the cover shield, a first emboss hole is formed on the rear surface of the cover buttom, and a second emboss hole corresponding to the first emboss hole is formed on the bottom surface. And, the cover shield is assembled and fastened through a screw passing through the first and second embossing holes toward the rear surface of the cover buttum.

In addition, the backlight unit includes a guide panel surrounding an edge of the liquid crystal panel, and a top cover surrounding an upper edge and a side surface of the liquid crystal panel.

As described above, by forming a support end on the cover shield coupled to the rear surface of the cover bottom according to the present invention, even if the cover shield is pressed, the cover shield contacts the driving circuit device mounted on the printed circuit board. There is an effect that can prevent it. Through this, it is possible to prevent the occurrence of electrical interference of the driving circuit device due to contact between the cover shield made of metal and the driving circuit device, and a wave pattern, etc., is generated on the screen, resulting in deterioration of the display quality of the liquid crystal display device. There is an effect that can prevent it from becoming.

In addition, there is an effect of improving the rigidity of the cover shield itself by the support end.

In addition, since the base can be formed with a minimum area of the cover shield, it is possible to prevent contact between the cover shield and the driving circuit elements by pressing the cover shield even in the recently required light-weight, thin and narrow-bezel liquid crystal display devices. There is an effect that can be done.

1 is a cross-sectional view of a liquid crystal display device including a general edge type backlight unit using an LED as a light source.
2 is a schematic perspective view of a liquid crystal display according to an embodiment of the present invention.
FIG. 3 is a perspective view schematically showing the rear surface of the modularized liquid crystal display of FIG. 2;
Figure 4a is a perspective view schematically showing a cover shield according to an embodiment of the present invention.
Figure 4b is a cross-sectional view of Figure 4a.
Figure 5 is a schematic cross-sectional view of a portion of Figure 2 modularized.

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

FIG. 2 is a perspective view schematically illustrating a liquid crystal display device according to an exemplary embodiment of the present invention, and FIG. 3 is a perspective view schematically illustrating a rear surface of the modularized liquid crystal display device of FIG. 2.

As shown, the liquid crystal display according to the embodiment of the present invention is largely composed of a liquid crystal panel 110, a backlight unit 120, a guide panel 130, a top cover 140, and a cover bottom 150. .

At this time, if the direction on the drawing is defined for convenience of explanation, the backlight unit 120 is disposed at the rear of the liquid crystal panel 110 under the premise that the display surface of the liquid crystal panel 110 faces forward, and The top cover 140 is located in front of the liquid crystal panel 110 with the rectangular frame-shaped guide panel 130 wrapped around it, and the cover buttom 150 is located on the back of the backlight unit 120, Combined and integrated.

Let's look at each of these in more detail.

First, the liquid crystal panel 110 is a part that plays a key role in image expression of a liquid crystal display device, and the first and second substrates 112 and 114 are bonded to each other, and a liquid crystal layer interposed therebetween. Includes (not shown).

Although not shown in the drawing, a plurality of gate lines and data lines cross each other to define pixels on the inner surface of the first substrate 112 called a lower substrate or an array substrate, and a thin film transistor at each intersection point. : TFT) is provided and is connected to the transparent pixel electrode formed in each pixel in a one-to-one correspondence.

And the inner surface of the second substrate 114 called the upper substrate or the color filter substrate, as an example, corresponding to each pixel, color filters of red (R), green (G), and blue (B) colors, and these A black matrix covering each of the gate lines, data lines, and thin film transistors is provided.

In addition, red (R), green (G), blue (B) color filters and transparent common electrodes covering the black matrix are provided.

In addition, at the boundary between the first and second substrates 112 and 114 and the liquid crystal layer (not shown), upper and lower alignment layers (not shown) that determine the initial molecular arrangement direction of the liquid crystal are interposed, and the first and second substrates A seal pattern (not shown) is formed along the edges of both substrates 112 and 114 to prevent leakage of the liquid crystal layer (not shown) filled between the (112 and 114).

Further, polarizing plates 119a and 119b (refer to FIG. 5) that selectively transmit only specific light are attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

Along 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) to cover it during the modularization process. It is in close contact with the back of the buttum 150.

Accordingly, when the thin film transistor selected for each gate line is turned on by the on/off signal of the thin film transistor scanned and transmitted to the gate line, the liquid crystal panel 110 transmits the image signal of the data line to the corresponding pixel electrode. Is transmitted, and the arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode generated thereby, indicating a difference in transmittance.

In addition, the liquid crystal display device according to the present invention includes a backlight unit 120 that supplies light from a rear surface of the liquid crystal panel 110 so that a difference in transmittance of the liquid crystal panel 110 is expressed to the outside.

The backlight unit 120 includes an LED assembly 129 arranged along at least one edge in the longitudinal direction of the cover bottom 150, a reflector 125, a light guide plate 123 mounted on the reflector 125, and It includes an optical sheet 121 positioned above the light guide plate.

The LED assembly 129 is a light source of the backlight unit 120 and is located on one side of the light guide plate 123 so as to face the light incident surface of the light guide plate 123, and such an LED assembly 129 includes a plurality of LEDs 129a, A plurality of LEDs (129a) includes a PCB (129b) is mounted at a predetermined interval.

At this time, the plurality of LEDs 129a emit light having colors of red (R), green (G), and blue (B) respectively toward the front of the light-incident surface of the light guide plate 123, and such a plurality of RGB LEDs 129a ) Can be turned on at once to realize white light by color mixing.

In particular, in recent years, in order to improve luminous efficiency and luminance, a blue LED 129a including a blue LED chip having excellent luminous efficiency and luminance is used, and as a phosphor,'cerium doped yttrium aluminum garnet (YAG:Ce)', That is, a blue LED 129a made of a yellow phosphor is used.

The blue light emitted from the LED 129a passes through the phosphor and is mixed with the yellow light emitted by the phosphor, thereby implementing white light.

The light guide plate 123 into which the light emitted from the plurality of LEDs 129a is incident is evenly distributed over a wide area of the light guide plate 123 while the light incident from the LEDs 129a travels through the light guide plate 123 by several total reflections. Spread to provide a surface light source to the liquid crystal panel 110.

The light guide plate 123 may include a pattern of a specific shape on the lower surface to supply a uniform surface light source. Here, the pattern can be configured in various ways, such as an elliptical pattern, a polygon pattern, and a hologram pattern, in order 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.

The reflector 125 is positioned on the rear surface of the light guide plate 123 and reflects the light that has passed through the rear surface of the light guide plate 123 toward the liquid crystal panel 110 to improve the luminance of the light.

The optical sheet 121 on the upper part of the light guide plate 123 includes a diffusion sheet and at least one light collecting sheet, and diffuses or condenses the light that has passed through the light guide plate 123 to provide a more uniform surface light source to the liquid crystal panel 110. Let's join.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the top cover 140, the guide panel 130, and the cover bottom 150, and the top cover 140 includes the upper edge of the liquid crystal panel 110 and the Organize to cover the side.

Here, the top cover 140 has a rectangular frame shape in which the cross section is bent in a “b” shape so as to cover the upper surface and side edges of the liquid crystal panel 110, and a first horizontal portion covering the upper surface edge of the liquid crystal panel 110 ( 141 and a first vertical portion 143 vertically from the first horizontal portion 141 and covering the side surface of the liquid crystal panel 110, which is implemented in the liquid crystal panel 110 by opening the front of the top cover 140 It is configured to display an image.

The guide panel 130 has a rectangular frame shape for supporting the edge of the liquid crystal panel 110 and surrounding the edge of the backlight unit 120, and a second vertical portion 131 and a second vertical portion surrounding the side surface of the backlight unit 120 A second horizontal portion 133 is provided inside the vertical portion 131 to separate the positions of the liquid crystal panel 110 and the backlight unit 120.

The liquid crystal panel 110 is attached and fixed on the second horizontal portion 133 through an adhesive pad (not shown) such as double-sided tape.

In addition, the guide panel 130 is mounted on the cover bottom 150, and the cover bottom 150 includes a horizontal surface 151 and an edge portion 153 in which an edge of the horizontal surface 151 is vertically bent.

The guide panel 130, the cover bottom 150, and the top cover 140 cover the upper edge of the liquid crystal panel 110 with the edge of the liquid crystal panel 10 and the backlight unit 120 wrapped around the guide panel 130. The covering top cover 140 and the cover bottom 150 covering the rear surface of the backlight unit 120 are coupled at the front and rear sides, respectively, and are integrally modularized through the guide panel 130.

At this time, the top cover 140 may be referred to as a case top or a top case, the guide panel 130 may be referred to as a support main or main support, or a mold frame, and the cover bottom 150 is referred to as a bottom cover or a lower cover. It also loses.

At this time, in the liquid crystal display device having the above-described structure, the top cover 140 may be deleted in order to implement a light-weight and thin liquid crystal display device that is recently required. By removing the top cover 140, the liquid crystal display can be lightweight and thin, and has the effect of simplifying the process.

In addition, due to the deletion of the top cover 140 made of a metal material, process cost may be reduced.

Here, in the liquid crystal display device of the present invention, a cover shield 200 for protecting the printed circuit board 117 that is in close contact with the cover bottom 150 is coupled. The cover shield 200 includes the cover bottom 150 The upper surface facing the rear of the box has an open box shape, and is located at a predetermined distance from the driving circuit element 117a (see FIG. 5) mounted on the printed circuit board 117.

The cover shield 200 is fixed with a plurality of screws 160 that penetrate the bottom surface 201 and are inserted into the rear surface of the cover bottom 150. To this end, the rear surface of the cover bottom 150 and the cover shield 200 First and second embossing holes 155 and 230 are formed on the bottom surface 201 of the unit, respectively, protruding in a direction facing each other. Therefore, each screw 160 passes through the second emboss hole 230 of the cover shield 200 and is inserted into the first emboss hole 155 of the cover bottom 150, so that the cover shield 200 is It will be fastened to the back of (150).

At this time, in the cover shield 200 according to the embodiment of the present invention, a first support part 211 protruding vertically from the bottom surface 201 of the cover shield 200 and a vertically from the first support part 211 It is characterized in that the support end 210 including the second support part 213 parallel to the bottom surface 201 is formed by being bent.

The second support part 213 of the support end 210 is supported by being in close contact with the rear surface of the cover buttum 150.

Through this, in the liquid crystal display according to an embodiment of the present invention, even when the cover shield 200 is pressed, the bottom surface 201 of the cover shield 200 is supported by the support end 210, so that the cover shield ( 200) and the driving circuit device 117a (refer to FIG. 5) mounted on the printed circuit board 117 maintain a constant spacing.

Therefore, it is possible to prevent electrical interference between the driving circuit element 117a (refer to FIG. 5) due to contact between the cover shield 200 made of a metal material and the driving circuit element 117a (refer to FIG. 5). It is possible to prevent the display quality of the liquid crystal display from deteriorating due to the occurrence of wave patterns on the image.

As described above, in the liquid crystal display device according to the embodiment of the present invention, by forming the support end 210 on the cover shield 200 coupled to the rear surface of the cover bottom 150, the cover shield 200 is pressed. Even so, it is possible to prevent the cover shield 200 from coming into contact with the driving circuit element 117a (see FIG. 5) mounted on the printed circuit board 117. Through this, it is possible to prevent electrical interference between the driving circuit element 117a (refer to FIG. 5) due to contact between the cover shield 200 made of a metal material and the driving circuit element 117a (refer to FIG. 5), It is possible to prevent the display quality of the liquid crystal display from deteriorating due to the occurrence of wave patterns on the screen.

4A is a perspective view schematically showing a cover shield according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view of FIG. 4A.

As shown, the cover shield 200 according to the embodiment of the present invention has a rectangular plate shape having a side surface 203 with four edges vertically bent, and the bottom surface 201 and its edge vertically bent upward Is made of a side surface 203 having a first height h1.

In addition, the side surface 203 includes a first fixing end 221 extending from the side 203 to have a second height h2 and a second fixing end 223 bent from the first fixing end 221. The top 220 is provided, and the second fixed end 223 is vertically bent outward from the first fixed end 221 so as not to face the bottom surface 201 of the cover shield 200.

At this time, the second fixed end 223 is in close contact with the rear surface of the cover bottom (150 in FIG. 3) to support the cover shield 200, and the rear surface of the cover bottom (150 in FIG. 3) and the cover shield 200 A spaced area spaced apart from each other is formed between the bottom surfaces 201.

A plurality of these fixing parts 220 are formed to protrude along the longitudinal direction of the side surface.

A plurality of second embossing holes 230 are formed in the bottom surface 201, and the second embossing hole 230 has a column surface forming an inner hollow part protruding perpendicularly from the bottom surface 201, and a screw in the center of the column surface. A screw hole is formed so that (160 in FIG. 3) can be inserted.

In particular, in the cover shield 200 according to the embodiment of the present invention, the first support part 211 is bent vertically upward from the bottom surface 201 and has a third height h3 that is larger than the first height h1 And a support end 210 including a second support part 213 which is bent vertically from the first support part 211 and is formed in parallel with the bottom surface 201.

A plurality of support ends 210 may be formed along one edge in the longitudinal direction of the cover shield 200, or may be formed in a plurality along two edges facing each other in the longitudinal direction, a printed circuit board (117 in FIG. 3). The supporting end 210 formed on one edge of the cover shield 200 facing one edge of the connected liquid crystal panel (110 in FIG. 3) is a printed circuit board (117 in FIG. 3) and a liquid crystal panel (110 in FIG. 3). It is preferable that the plurality of connecting members (116 in FIG. 3) are positioned to correspond to the respective inter-regions.

At this time, the third height h3 of the first support part 211 is the same as the sum of the first height h1 of the side surface 203 and the second height h2 of the first fixed end 221. Is formed. Accordingly, the second support part 213 is also in close contact with the rear surface of the cover buttum (150 in FIG. 3 ), similarly to the second fixed end 223 of the fixed end 220 to support the cover shield 200.

That is, the cover shield 200 according to the embodiment of the present invention is a driving circuit device 117a mounted on a printed circuit board (117 in FIG. 3) that is folded and adhered to the rear surface of the cover bottom (150 in FIG. 3). 5), it is fastened to the rear surface of the cover buttum (150 in FIG. 3). At this time, the cover shield 200 made of a metal material and the driving circuit element 117a (see FIG. 5) are not contacted. It is important.

However, as the cover shield 200 is pressed by an external force, contact between the cover shield 200 and the driving circuit element 117a (refer to FIG. 5) may occur. The cover according to an embodiment of the present invention The shield 200 is provided with a support end 210 including a second support part 213 that is in close contact with the rear surface of the cover buttum (150 in FIG. 3) to support the cover shield 200, Even when pressing occurs, the bottom surface 201 of the cover shield 200 is supported by the support end 210, so that the driving circuit device mounted on the cover shield 200 and the printed circuit board (117 in FIG. 3) ( 117a, see FIG. 5) maintains a constant spacing.

Therefore, it is possible to prevent electrical interference between the driving circuit element 117a (refer to FIG. 5) due to contact between the cover shield 200 made of a metal material and the driving circuit element 117a (refer to FIG. 5). It is possible to prevent the display quality of the liquid crystal display from deteriorating due to the occurrence of wave patterns on the image.

In addition, the rigidity of the cover shield 200 itself is also improved by the receiving end 210.

In addition, the support end 210 according to the embodiment of the present invention includes a first support part 211 vertically bent from the bottom surface 201 and a second support part vertically bent from the first support part 211 As it is made of (213), since the area occupied by the support end 210 on the bottom surface 201 is only the area where the first support part 211 is bent, the support end with the minimum area in the cover shield 200 ( 210) can be formed.

Through this, even for a light-weight, thin, and narrow-bezel liquid crystal display device that has been recently required, contact between the cover shield 200 and the driving circuit element 117a (refer to FIG. 5) due to the pressing of the cover shield 200 Can be prevented.

On the other hand, the second support part 213 of the support end 210 is positioned to correspond to the center of the cover shield 200 when the cover shield 200 is pressed, the bottom surface 201 of the cover shield 200 To support more stably. To this end, it is preferable to form the first support portion 211 of the support end 210 by bending it vertically from the bottom surface 201, rather than extending from the side surface 203 of the cover shield 200. It is not limited thereto.

Through this, a groove 205 is formed between the support end 210 and the side surface 203 of the cover shield 200, as viewed by the groove 205 formed between the support end 210 and the side surface 203 The cover shield 200 according to the embodiment of the present invention is for forming the cover shield 200 while allowing the second support part 213 of the support end 210 to be located corresponding to the center of the cover shield 200 The use of materials can be minimized.

FIG. 5 is a schematic cross-sectional view of a part of FIG. 2 that is modularized.

As shown, an optical sheet on the top of the reflective plate 125, the light guide plate 123, the LED assembly 129 comprising the PCB 129b on which the LED 129a and the LED 129a are mounted, and the light guide plate 123 121) are stacked to form a backlight unit (120 in FIG. 2).

In addition, a liquid crystal panel 110 with a liquid crystal layer (not shown) interposed therebetween is located on the first and second substrates 112 and 114 on the backlight unit (120 in FIG. 2), and the first and second substrates 112 and 114 Polarizing plates 119a and 119b that selectively transmit only specific light are attached to the outer surfaces of each of the substrates 112 and 114.

The backlight unit (120 in FIG. 2) and the liquid crystal panel 110 are edged by the guide panel 130, and the cover bottom 150 is coupled to the rear surface thereof, and the upper edge and side surfaces of the liquid crystal panel 110 The top cover 140 surrounding it is coupled to the guide panel 130 and the cover bottom 150.

Here, the liquid crystal panel 110 is seated and supported on a second horizontal portion 133 protruding inward of the second vertical portion 131 of the guide panel 130, and the second vertical portion 131 of the guide panel 130 ) Is positioned in close contact with the outer surface of the edge portion 153 of the cover buttum 150.

And the inner surface of the first vertical portion 143 of the top cover 140 is positioned in close contact with the outer surface of the second vertical portion 131 of the guide panel 130, and the first vertical portion of the top cover 140 The portion 143, the second vertical portion 131 of the guide panel 130, and the edge portion 153 of the cover butt 150 are integrally assembled and fastened to each other through a screw 170.

At this time, the printed circuit board 117 connected through the connection member 116 along one edge of the liquid crystal panel 110 is in close contact with the back surface of the cover buttoum 150, and to protect the printed circuit board 117 The cover shield 200 is assembled and coupled to the rear surface of the cover bottom 150.

A second emboss hole 230 corresponding to the first emboss hole 155 protruding from the rear surface of the cover bottom 150 is formed on the bottom surface 201 of the cover shield 200, and the cover shield 200 and the cover After matching the first and second embossing holes 155 and 230, the butum 150 penetrates the screw 160 through the first and second embossing holes 155 and 230 to assemble and fasten each other.

And, the fixed end 220 consisting of a first fixed end 221 protruding from the side surface 203 of the cover shield 200 and a second fixed end 223 bent vertically from the first fixed end 221 Silver, the second fixing end 223 is in close contact with the rear surface of the cover buttum 150 to support the cover shield 200.

Accordingly, the cover shield 200 is positioned at a predetermined interval from the driving circuit element 117a mounted on the printed circuit board 117.

In particular, the cover shield 200 according to an embodiment of the present invention includes a first supporting part 211 vertically bent from the bottom surface 201 of the cover shield 200, and a bottom surface from the first supporting part 211 A second support part 213 that is vertically bent so as to be parallel to the 201 is provided, and the second support part 213 is in close contact with the rear surface of the cover bottom 150 to support the cover shield 200.

Through this, even if the cover shield 200 is pressed by an external force, the bottom surface 201 of the cover shield 200 is supported by the receiving end 210, so that the cover shield 200 and the printed circuit board 117 ) Is mounted on the driving circuit element (117a) can maintain a constant spacing.

Therefore, it is possible to prevent electrical interference between the driving circuit element 117a caused by contact between the cover shield 200 made of a metal material and the driving circuit element 117a, thereby generating a wave pattern on the screen. It is possible to prevent the display quality of the liquid crystal display from deteriorating.

In addition, since the support end 210 is formed by vertically bending the first support portion 211 from the bottom surface 201 of the cover shield 200, the area occupied by the support end 210 on the bottom surface 201 is Since only the first support part 211 is bent, the support end 210 can be formed with a minimum area in the cover shield 200.

Through this, it is possible to prevent contact between the cover shield 200 and the driving circuit element 117a due to the pressing of the cover shield 200 even for a light-weight, thin, and narrow-bezel liquid crystal display device that has been recently required. .

As described above, in the liquid crystal display device according to the embodiment of the present invention, by forming the support end 210 on the cover shield 200 coupled to the rear surface of the cover bottom 150, the cover shield 200 is pressed. Even so, it is possible to prevent the cover shield 200 from contacting the driving circuit element 117a mounted on the printed circuit board 117. Through this, it is possible to prevent electrical interference between the driving circuit element 117a caused by contact between the cover shield 200 made of a metal material and the driving circuit element 117a, thereby generating a wave pattern on the screen. Thus, it is possible to prevent the display quality of the liquid crystal display from deteriorating.

Meanwhile, between the LED assembly 129 and the cover bottom 150, an LED housing 180 for effectively dissipating high-temperature heat generated from the LED assembly 129 to the outside may be further provided.

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

110: liquid crystal panel (112, 114: first and second substrates)
116: connecting member, 117: printed circuit board (117a: driving circuit device)
119a, 119b: polarizer
121: optical sheet, 123: light guide plate, 125: reflector
129: LED assembly (129a: LED, 129b: PCB)
130: guide panel (131: second horizontal portion, 133: second vertical portion)
140: top cover (141: first horizontal portion, 143: first vertical portion)
150: cover buttum (151: horizontal plane, 153: edge portion, 155: first embo hole)
160, 170: screw
180: LED housing
200: cover shield (201: bottom surface, 203: side)
210: support end (211: first support, 213: second support)
220: fixed end (221: first fixed end, 223: second fixed end)
230: second embo hole

Claims (9)

A liquid crystal panel to which a printed circuit board is connected through a connection member;
A backlight unit positioned under the liquid crystal panel;
A cover bottom on which the backlight unit and the liquid crystal panel are mounted;
A cover shield that is assembled and fastened to the rear surface of the cover butt to surround the printed circuit board in close contact with the cover butt, and includes a support end that is in close contact with the rear surface of the cover butt.
Including,
The cover shield includes a bottom surface and a side surface in which an edge of the bottom surface is vertically bent upward, and the support end is formed with a first supporting portion vertically bent upward from one edge of the floor surface and the bottom surface. It includes a second support portion bent vertically from the first support to face and parallel,
The second support portion extends toward the other edge facing one edge of the bottom surface, and is positioned to correspond between the edge of the bottom surface and the other edge.
The method of claim 1,
The second supporting part is in close contact with the rear surface of the cover buttum.
The method of claim 1,
The side surface is formed with a fixing portion consisting of a first fixing end extending from the side surface and a second fixing end vertically bent from the first fixing end so as not to face the bottom surface,
The second fixed end is in close contact with the rear surface of the cover buttum.
The method of claim 3,
The side surface has a first height, the first fixed end has a second height, and the first support portion has a third height corresponding to a sum of the first height and the second height.
The method of claim 1,
The printed circuit board and the liquid crystal panel are connected through a plurality of the connecting members,
The supporting end is a liquid crystal display device positioned to correspond to each region between the plurality of connecting members.
delete The method of claim 1,
A liquid crystal display device having a groove formed between the receiving end and the side surface of the cover shield.
The method of claim 1,
A first emboss hole is formed on the rear surface of the cover butum, a second emboss hole corresponding to the first emboss hole is formed on the bottom surface, and the cover shield is formed on the rear surface of the cover buttom. A liquid crystal display device assembled and fastened through a screw passing through the emboss hole. The method of claim 1,
A liquid crystal display device comprising: a guide panel surrounding an edge of the backlight unit and the liquid crystal panel, and a top cover surrounding an upper edge and a side surface of the liquid crystal panel.

Images