KR102093629B1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device, and particularly to a liquid crystal display device having a stable fastening structure.
A feature of the present invention is to form a fastening hole at a position corresponding to the bracket on the first side of the cover bottom corresponding to one edge where the LED assembly is located, and correspondingly to form a fastening protrusion inserted into the fastening hole in the guide panel. Is to do.
Through this, it is possible to provide a stable and modular liquid crystal display device having a lightweight, thin, and narrow bezel.
In particular, by forming the fastening protrusions passing through the fastening holes to engage the bracket, the fastening force of the fastening protrusions and fastening holes can be further improved.

Description

Liquid crystal display device

The present invention relates to a liquid crystal display device, and particularly to a liquid crystal display device having a stable fastening structure.

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

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

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

The backlight unit uses a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp, and a light emitting diode (LED).

Among them, in particular, LEDs have a characteristic of small size, low power consumption, high reliability, and are widely used as a light source for display.

On the other hand, the general backlight unit is divided into a direct type (Direct type) and an edge type (Edge type) method according to the arrangement structure of the lamp. In the edge type method, one or a pair of light sources has one or two or two pairs of light guide plates. A light source has a structure disposed on each side of each of the light guide plates, and the direct type method is a structure in which several light sources are disposed on a lower portion of the liquid crystal panel.

Here, the direct-type method has a limitation in thinning, and is mainly used in a liquid crystal display device in which brightness is more important than the thickness of the screen. The edge-type method that is lighter and thinner than the direct-type method is the same as a notebook PC or a monitor PC. It is mainly used in liquid crystal displays where thickness is important.

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

As illustrated, a liquid crystal display device including a general edge type backlight unit 20 includes a liquid crystal panel 10 and a backlight unit 20, a guide panel 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 display, and is composed of first and second substrates 12 and 14 adhered to each other with a liquid crystal layer interposed therebetween.

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

The 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, and the LED assembly 29 made of 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 reflector 25 seated on the bottom 50, a light guide plate 23 seated on the reflector 25, and an optical sheet 21 positioned thereon.

The liquid crystal panel 10 and the backlight unit 20 have a top cover 40 that surrounds 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 a rectangular frame-shaped guide panel 30. Cover cover (50) covering each is coupled in front and rear respectively, and is integrated through the guide panel (30).

On the other hand, in recent years, such liquid crystal display devices, as well as portable computers, desktop computer monitors, and wall-mounted televisions, etc., are increasingly in use, and researchers who want to have a significantly reduced weight and volume while having a large display area. It is actively progressing.

In addition, in addition to light weight and thinness, the liquid crystal display device is also required for a narrow bezel in which a display area is wide and a bezel area that is a non-display area other than the display area is formed as small as possible.

Accordingly, in the process of modularizing the liquid crystal panel 10 and the backlight unit 20 through the top cover 40, the guide panel 30, and the cover bottom 50, a liquid crystal display having a lightweight, thin and narrow bezel design To implement the device, a fastening structure of the guide panel 30 and the cover bottom 50 is not formed at one edge of the guide panel 30 and the cover bottom 50 corresponding to one edge where the LED assembly 29 is located. It is not being done.

The present invention is intended to solve the above-mentioned problems, and has an object to provide a liquid crystal display device having a light weight, a thin shape, and a narrow bezel while being more stable and modular.

In order to achieve the object as described above, the present invention is a liquid crystal panel; A backlight unit positioned under the liquid crystal panel and having an LED assembly along a first edge; A guide panel formed of a vertical portion surrounding the edge of the backlight unit, a horizontal portion on which the liquid crystal panel is seated, and a fastening protrusion protruding outward from the vertical portion corresponding to the first edge; A horizontal surface on which the liquid crystal panel and the backlight unit are mounted, a side surface perpendicular to the horizontal surface, and a bracket extending vertically bent from the side surface on the side surface corresponding to the first edge, and a position corresponding to the bracket It provides a liquid crystal display device comprising a cover bottom formed in the fastening hole is formed in the fastening projection is inserted into.

The fastening hole is formed to correspond to the boundary between the side surface and the bracket, and the fastening protrusion passes through the fastening hole and is exposed to the outside of the side surface to engage the bracket, and a fitting hole is formed in the bracket, The length of the fastening protrusion is formed longer than the thickness of the side surface, but is less than the width of the bracket or does not cover the fitting hole.

In addition, the fastening hole is located in an area bounded by a virtual extension line extending from both front ends of the bracket to the side surface, and the guide panel has a plurality of fastening hooks outside the vertical part corresponding to the second to third edges. Is formed.

In addition, the cover bottom is formed with a coupling hole through which the plurality of fastening hooks are inserted into the side surface corresponding to the second to third edges, and the backlight unit includes a light guide plate, an optical sheet and a reflector.

In addition, the guide panel, the cover bottom and the liquid crystal panel are surrounded by an edge through an adhesive tape.

As described above, in accordance with the present invention, a second fastening hole is formed at a position corresponding to the bracket on a first side of the cover bottom corresponding to one edge where the LED assembly is located, and correspondingly, a second fastening is made to the guide panel. By forming a fastening protrusion to be inserted into the hole, through this, it is possible to provide a liquid crystal display device having a light weight, thinness, and narrow bezel, while being stable and modular.

Particularly, by forming the fastening protrusions passing through the second fastening holes to engage the bracket, there is an effect that the fastening force of the fastening protrusions and the second fastening holes can be further improved.

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

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

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

As illustrated, the liquid crystal display device is composed of a liquid crystal panel 110 and a backlight unit 120, a guide panel 130 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 behind the liquid crystal panel 110 on the premise that the display surface of the liquid crystal panel 110 faces forward, and the outlines thereof are disposed. The cover bottom 150, which is in close contact with the rear surface of the backlight unit 120 in a state in which the rectangular frame-shaped guide panel 130 is enclosed, is combined and integrated in the front and rear.

Let's take a closer look at each of these.

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

Here, although not shown on the drawing, a plurality of gate lines and data lines are intersected and pixels are defined on the inner surface of the first substrate 112, commonly referred to as a lower substrate or an array substrate, 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 on each pixel.

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

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

At this time, although not clearly shown in the drawings, the upper and lower alignment layers (not shown) interposing the initial molecular alignment direction of the liquid crystal are interposed at the boundary between the two substrates 112 and 114 and the liquid crystal layer (not shown). , A seal pattern (not shown) is formed along the edges of both the substrates 112 and 114 to prevent leakage of the liquid crystal layer (not shown) filled between the first and second substrates 112 and 114. .

In addition, polarizing plates 119a, 119b (see FIG. 5) selectively transmitting only specific light are attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

A printed circuit board 117 is connected via a connecting member 116 such as a flexible circuit board or a tape carrier package (TCP) along one edge of the liquid crystal panel 110 to guide the module in the modularization process. The side surface of the panel 130 or the cover bottom 150 is properly flipped to the back surface to be in close contact.

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

In addition, the liquid crystal display device according to the present invention is provided with a backlight unit 120 for supplying light from its rear surface so that a difference in transmittance represented by the liquid crystal panel 110 is externally expressed.

The backlight unit 120 includes an LED assembly 129 arranged along at least one edge in the longitudinal direction of the guide panel 130, a reflective plate 125, a light guide plate 123 mounted on the reflective plate 125, and And 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 the LED assembly 129 includes a plurality of LEDs 129a, It includes a plurality of LED (129a) PCB (129b) is mounted spaced apart at regular intervals.

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

In particular, in order to improve luminous efficiency and brightness, in particular, blue LED 129a including a blue LED chip having excellent luminous efficiency and brightness 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 realizing white light.

The light guide plate 123 through 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 LED 129a progresses in the light guide plate 123 by multiple total reflections. Spreads to provide a surface light source for the liquid crystal panel 110.

The light guide plate 123 is excellent in transparency, weather resistance, and colorability, and induces light diffusion when light is transmitted.

The light guide plate 123 is selected from among plastic materials such as polymethylmethacrylate (PMMA) or polycarbonate (PC) series, which is one of the transparent materials that can transmit light. It can be manufactured, and the transparency, weather resistance, and colorability are excellent, and PMMA, which induces light diffusion when light is transmitted, is most widely used.

In addition, the light guide plate 123 may include a pattern having a specific shape on the lower surface to supply a uniform surface light source. Here, the pattern may be variously configured such as an elliptical pattern, a polygonal pattern, a hologram pattern, etc. 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 to reflect the light passing through the rear surface of the light guide plate 123 toward the liquid crystal panel 110, thereby improving the luminance of the light.

The optical sheet 121 above the light guide plate 123 includes a diffusion sheet and at least one light collecting sheet, and diffuses or collects light passing through the light guide plate 123 to provide a more uniform surface light source to the liquid crystal panel 110. Try to join.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the guide panel 130 and the cover bottom 150. The guide panel 130 supports the edges of the liquid crystal panel 110 and the backlight unit 120. In a rectangular frame shape to surround the edge of the horizontal, the vertical portion 131 surrounding the side of the backlight unit 120 and the horizontal dividing the positions of the liquid crystal panel 110 and the backlight unit 120 inward of the vertical portion 131 A portion 133 is provided.

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

At this time, a plurality of fastening hooks 135 are protruded outside the vertical portion 131 of the guide panel 130 except for one edge where the LED assembly 129 is located, and the LED assembly 129 is located. A fastening protrusion 137 is protruded from the vertical portion 131 corresponding to one edge.

Then, the guide panel 130 is seated on the cover bottom 150, the cover bottom 150 is made of a horizontal surface 151 and the side 153 of the horizontally curved edge of the horizontal surface.

At this time, the coupling hole 155 in which the fastening hook 135 and the fastening protrusion 137 formed to protrude outward of the vertical portion 131 of the guide panel 130 are inserted into the side surface 153 of the cover bottom 150 and A fastening hole (159, see FIG. 3) is formed, the cover bottom 150 and the guide panel 130 are fastening hooks 135 and fastening projections 137, engaging holes 155 and fastening holes (159, 3) (See) is assembled with each other.

Therefore, the cover bottom 150 and the guide panel 130 are assembled and fastened together, and are integrally modularized.

At this time, brackets 157 are provided on both sides of the cover bottom 150 in the longitudinal direction for assembly and fastening with a system case (not shown).

At this time, the second fastening hole (159, see FIG. 3) of the cover bottom 150 is formed to be located on the side 153 corresponding to the bracket 157 vertically bent from the side 153.

Through this, the liquid crystal display device according to an embodiment of the present invention can be more securely assembled and fastened the guide panel 130 and the cover bottom 150. Accordingly, it is possible to provide a liquid crystal display device having a light weight, thinness, and narrow bezel, while being stable and modular. We will look at this in more detail later.

At this time, the guide panel 130 is also referred to as a support main or main support, a mold frame, and the cover bottom 150 is also called a bottom cover or a lower cover.

Then, in order to modularize the liquid crystal panel 110 more stably, the guide panel 130, the cover bottom 150, and the edges of the liquid crystal panel 110 are once again surrounded by an adhesive tape 140 (see FIG. 4A). It can be modularized.

The liquid crystal display according to the above-described embodiment of the present invention forms a second fastening hole 159 (refer to FIG. 3) on the side surface 153 where the bracket 157 of the cover bottom 150 is located, and the LED assembly 129 ) By guiding the insertion of the fastening protrusion 137 formed outward of the vertical portion 131 of the guide panel 130 corresponding to one edge in which it is located in the second fastening hole 159 (refer to FIG. 3), the guide panel ( 130) and the cover bottom 150 can be assembled more stably.

Through this, it is possible to provide a liquid crystal display device having a light weight, thinness, a narrow bezel, and a stable modularity.

3 is a perspective view schematically showing a cover bottom of a liquid crystal display according to an exemplary embodiment of the present invention.

As shown, the cover bottom 150 provides a liquid crystal display by providing a horizontal surface 151 on which a backlight unit (120 in FIG. 2) including a liquid crystal panel (110 in FIG. 2) and a guide panel (130 in FIG. 2) are seated. It serves as a subframe that supports the entire device while minimizing light loss.

Looking at this in more detail, the cover bottom 150 is a quadrangular plate shape having vertically bent sides at four edges, and a horizontal surface 151 closely contacting the back surface of the backlight unit (120 in FIG. 2) and an edge thereof vertically. It consists of the first to fourth side surfaces (153a, 153b, 153c, 153d) that are bent upward.

At this time, the fastening of the guide panel (130 in FIG. 2) to the second to fourth side surfaces 153b, 153c, and 153d except for the first side surface 153a corresponding to one edge where the LED assembly (129 in FIG. 2) is located A plurality of coupling holes 155 into which the hook (135 of FIG. 2) is inserted is formed, and a fastening protrusion (137 of FIG. 2) of the guide panel (130 of FIG. 2) is inserted into the first side surface 153a. The fastening hole 159 is formed.

In addition, brackets 157 for assembling and fastening with a system case (not shown) are provided on both sides of the first and third side surfaces 153a and 153c facing each other, and the brackets 157 cover cover ( 150) is formed by bending vertically from the first and third side surfaces 153a and 153c to the outside not facing the horizontal surface 151, and the bracket 157 has a fitting hole 157a into which a screw or rivet is inserted. Is formed.

At this time, the fastening hole 159 formed in the first side (153a) is characterized in that it is located corresponding to the bracket 157, look in more detail of the bracket 157 extending vertically bent from the first side (153a) Fastening holes 159 are formed in an arbitrary region A bounded by an imaginary extension line extending from both front ends to the first side 153a.

Here, the fastening hole 159 is preferably formed to correspond to the boundary between the bracket 157 and the first side 153a in an arbitrary region A.

Figure 4a is a perspective view schematically showing a part of the modularized Figure 2, Figure 4b is a bottom perspective view of Figure 4a.

As shown, the backlight unit (120 of FIG. 2) is surrounded by an edge by the guide panel 130, the liquid crystal panel 110 and the double-sided tape on the horizontal portion (133 of FIG. 2) of the guide panel 130 It is attached and fixed through the same adhesive pad (not shown).

The liquid crystal panel 110 and the backlight unit (120 in FIG. 2) whose edges are surrounded by the guide panel 130 are horizontally inward (inward) of the side surfaces 153a, 153b, 153c, and 153d of the cover bottom 150. Seated on 151 in FIG. 3, the outer surface of the vertical portion of the guide panel 130 (131 in FIG. 2) is the inner surface of the side surfaces 153a of the cover bottom 150, 153b, 153c, and 153d of FIG. And in close contact with each other.

At this time, the fastening hook (135 of FIG. 2) and the fastening protrusion 137 formed to protrude outwardly of the vertical portion (131 of FIG. 2) of the guide panel 130 have side surfaces 153a of the cover bottom 150 and 153b of FIG. 3 , 153c, 153d) is inserted into the first and fastening holes (155, 159 in FIG. 3), the guide panel 130 and the cover bottom 150 are integrally modularized with each other.

In addition, the liquid crystal panel 110, the guide panel 130, and the cover bottom 150 are surrounded by an edge through the adhesive tape 140, so that the module is more stably integrated.

Here, the liquid crystal display device according to an embodiment of the present invention is fastened in response to the bracket 157 on the first side 153a of the cover bottom 150 corresponding to one edge where the LED assembly (129 of FIG. 2) is located. By forming the hole 159 and allowing the fastening protrusion 137 of the guide panel 130 to be inserted into the fastening hole 159, the liquid crystal display device according to an embodiment of the present invention has a guide panel 130 and a cover struggle All four edge portions of 150 are assembled and fastened to each other.

Through this, it is possible to stably assemble the guide panel 130 and the cover bottom 150, thereby providing a stable and modular liquid crystal display device having a lightweight, thin and narrow bezel.

Looking at this in more detail, in order to provide a liquid crystal display device having a lightweight, thin, and narrow bezel, which has been recently required, the first of the cover bottom 150 corresponding to one edge where the LED assembly (129 of FIG. 2) is located. On the side surface 153a, a printed circuit board (117 in FIG. 2) connected via a connecting member (116 in FIG. 2) along the edge of the liquid crystal panel 110 and the bracket 157 is formed. Due to the area of the side or the back of the cover bottom 150 that is brought into close contact, it is very difficult to form a fastening structure for assembling and fastening the cover bottom 150 and the guide panel 130 to each other.

Therefore, as the guide panel 130 and the cover bottom 150 are assembled and fastened to each other with only three edge portions excluding the edge portion corresponding to one edge where the LED assembly (129 of FIG. 2) is located, the fastening force thereof is weak, and the liquid crystal There is a problem that the display device cannot be stably modularized.

Accordingly, the liquid crystal display according to the exemplary embodiment of the present invention is an arbitrary region bounded by an imaginary extension line leading from the first side 153a to the first side 153a at both ends of the bracket 157 extending vertically from the first side 153a. LED assembly (129 in FIG. 2) by forming a fastening hole 159 in (A of FIG. 3), and forming a fastening protrusion 137 inserted into the fastening hole 159 in the guide panel 130 correspondingly ) Is located on one edge of the guide panel 130 and cover bottom 150 corresponding to one edge on which a separate area to form a fastening structure is formed, but the guide panel 130 and cover bottom 150 Can be stably assembled and fastened at all four edge portions, so that the guide panel 130 and the cover bottom 150 can be stably assembled and fastened.

In particular, since the LED assembly (129 of FIG. 2) does not need to separately form a separate area for fastening at an edge portion corresponding to one edge, a light and thin, narrow bezel, and a stable modularized liquid crystal display device It will provide.

5 is a cross-sectional view schematically showing a part of the modularized FIG. 2.

As shown in the figure, the LED assembly 129 and the light guide plate 123 made of a reflective plate 125, a light guide plate 123, and a PCB 129b on which the LEDs 129a and LEDs 129a are mounted are optical sheets ( 121) are stacked to form the backlight unit 120.

In addition, a liquid crystal panel 110 in which a liquid crystal layer (not shown) is interposed is disposed between the first and second substrates 112 and 114 and the first and second substrates 112 on the upper portion of the backlight unit 120. , 114) are attached to the outer surfaces of the polarizing plates 119a and 119b selectively transmitting only specific light.

The liquid crystal panel 110 and the backlight unit 120 are surrounded by an edge of the vertical portion 131 of the guide panel 130, and the liquid crystal panel 110 is a horizontal portion protruding inside the vertical portion 131 ( 133).

The liquid crystal panel 110 and the backlight unit 120 whose edges are surrounded by the guide panel 130 are on the horizontal surface 151 inside the side surfaces 153a of the cover bottom 150, 153b, 153c, and 153d in FIG. Seated on, the outer surface of the vertical portion 131 of the guide panel 130 is positioned in close contact with the inner surface of the side surfaces 153a, 153b, 153c, and 153d of FIG. 3.

At this time, a bracket 157 extending vertically bent is formed on the first side 153a of the cover bottom 150, and fastened to the first side 153a of the cover bottom 150 corresponding to the bracket 157. A hole 159 is formed, and the fastening protrusion 137 of the guide panel 130 is inserted into the fastening hole 159.

Here, the fastening protrusion 137 of the guide panel 130 is formed to have a length (w) longer than the thickness (d) of the first side 153a of the cover bottom 150, and thus passes through the fastening hole 159 Thus, it is exposed to the outside of the first side 153a. At this time, the fastening hole 159 is formed by corresponding to the boundary between the bracket 157 and the first side 153a, so that when the fastening protrusion 137 passes through the fastening hole 159, the fastening protrusion 137 is a bracket. It is formed in engagement with (157).

That is, one surface of the fastening protrusion 137 inserted into the fastening hole 159 is formed in close contact with one surface of the bracket 157, and thus the fastening protrusion 137 is formed by being engaged with the bracket 157, thereby fastening The fastening force of the bracket 157 is added to the fastening force of the protrusion 137 and the fastening hole 159, so that the fastening force between the fastening protrusion 137 and the fastening hole 159 is improved.

At this time, the length (w) of the fastening projection 137 is formed longer than the thickness (d) of the first side (153a), but is preferably formed smaller than the width of the bracket 157 extending from the first side (153a) And, more preferably, it is preferable to form not to cover the fitting hole 157a formed in the bracket 157.

As described above, the liquid crystal display device of the present invention is located at a position corresponding to the bracket 157 on the first side 153a of the cover bottom 150 corresponding to one edge where the LED assembly (129 of FIG. 2) is located. By forming a fastening hole 159 and correspondingly forming a fastening protrusion 137 that is inserted into the fastening hole 159 in the guide panel 130, the LED assembly (129 in FIG. 2) is positioned at one edge. The guide panel 130 and the cover bottom 150 are stable at all four edge portions without separately forming separate regions for forming the fastening structure at one edge portion of the corresponding guide panel 130 and the cover bottom 150. As it can be assembled and fastened, the guide panel 130 and the cover bottom 150 can be stably assembled and fastened.

Therefore, it is possible to provide a liquid crystal display device having a light weight, thinness and a narrow bezel, while being stable and modular.

Particularly, the fastening hole 159 is positioned corresponding to the boundary between the bracket 157 and the first side surface 153a, and the fastening protrusion 137 of the guide panel 130 passes through the fastening hole 159 to pass through the first side surface ( 153a) is formed to be exposed to the outside, so that the fastening protrusion 137 passing through the fastening hole 159 is engaged with the bracket 157, thereby further improving the fastening force between the fastening protrusion 137 and the fastening hole 159. I can do it.

The present invention is not limited to the above-described embodiments, and can be implemented by variously changing within the limits without departing from the gist of the present invention.

110: liquid crystal panel (112, 114: first and second substrates, 119a, 119: first and second polarizing plate)
120: backlight unit (121: optical sheet, 123: light guide plate, 125: reflector, 129: LED assembly (129a: LED, 129b: PCB))
130: guide panel (131: vertical portion, 133: horizontal portion, 137: fastening projection)
150: cover bottom (151: horizontal plane, 153a: first side, 157: bracket, 159: fastening hole)

Claims (9)

A liquid crystal panel;
A backlight unit positioned under the liquid crystal panel and having an LED assembly along a first edge;
Consists of a vertical portion surrounding the edge of the backlight unit, a horizontal portion on which the liquid crystal panel is seated, and a fastening protrusion protruding outwardly from the vertical portion where the PCB of the LED assembly is mounted to the inner surface corresponding to the first edge. A guide panel;
A bracket formed of a horizontal surface on which the liquid crystal panel and the backlight unit are seated, and a side surface perpendicular to the horizontal surface, wherein the side surface corresponding to the first edge is vertically bent and extended outward so as not to face the horizontal surface from the side surface. And, the cover bottom is formed in a position corresponding to the bracket and the fastening hole is inserted into the fastening projection is inserted
It includes,
The fastening protrusion penetrates through the fastening hole and protrudes to the outside of the side surface, and the protruding fastening protrusion is a liquid crystal display device in which one surface is in close contact with and engaged with one surface of the bracket.
According to claim 1,
The fastening hole is a liquid crystal display device formed corresponding to the boundary between the side surface and the bracket.
According to claim 1,
A fitting hole is formed in the bracket, and the length of the fastening protrusion is longer than the thickness of the side surface, but is less than the width of the bracket or does not cover the fitting hole.

According to claim 1,
The fastening hole is a liquid crystal display device positioned in an area bounded by a virtual extension line extending from both front ends of the bracket to the side.
According to claim 1,
The guide panel is a liquid crystal display device in which a plurality of fastening hooks are formed outside the vertical portion corresponding to the second to third edges.
The method of claim 5,
The cover bottom is a liquid crystal display device in which a coupling hole in which the plurality of fastening hooks are inserted is formed on the side surface corresponding to the second to third edges.
According to claim 1,
The backlight unit is a liquid crystal display device including a light guide plate, an optical sheet and a reflector.
According to claim 1,
The guide panel, the cover bottom and the liquid crystal panel is a liquid crystal display device having an edge around the adhesive tape.
The method of claim 3,
A system case is located outside the cover bottom and the liquid crystal panel,
The system case is a liquid crystal display device that is modularized with the cover bottom or the liquid crystal panel through a screw or rivet through the fitting hole.

Images