KR20150069145A - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device. According to the present invention, the liquid crystal display device comprises: a liquid crystal panel; a fixer attached along the rear edge of the liquid crystal panel and having a penetration groove at the center; a backlight unit supplying light to the liquid crystal panel; a support main located between the liquid crystal panel and the backlight unit, and having a support groove formed along an outer surface; and a top case including a vertical unit surrounding the side of the support main and a horizontal unit perpendicular to the vertical unit, and combined on the side of the support main. The horizontal unit of the top case comprises: a first horizontal unit inserted into the penetration groove of the fixer; and a second horizontal unit seated in the support groove of the support main. Accordingly, the liquid crystal display device has narrow bezel and has reliability to protect the liquid crystal panel from external impact.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

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 implemented with a narrow bezel using a fixer.

In recent years, the display field has been rapidly developed in accordance with the information age. In response to this trend, a display device having advantages of thinning, light weight, and low power consumption has been developed, such as a liquid crystal display device (LCD) And organic light emitting diode (OLED) display devices have been widely used with excellent performance.

Here, a liquid crystal display device (LCD), which is advantageous for moving picture display and has a large contrast ratio and is actively used for a TV, a monitor, a mobile phone, etc., has optical anisotropy and polarization The principle of image realization by polarization is shown.

Such a liquid crystal display device has a liquid crystal panel in which a liquid crystal panel is interposed between two adjacent substrates through a liquid crystal layer as an essential component and changes the alignment direction of the liquid crystal molecules in an electric field in the liquid crystal panel to realize a difference in transmittance 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 unit having a light source is disposed on the back of the liquid crystal panel.

Here, the backlight unit is divided into a direct type and an edge type according to the position of a light source. In a direct-type backlight unit, a light source is disposed below a liquid crystal panel, The backlight unit of the side type system has a structure in which a light guide plate is disposed under the liquid crystal panel and a light source is disposed on at least one side of the light guide plate so that light emitted from the light source is reflected indirectly To the liquid crystal panel.

The liquid crystal panel and the backlight unit are modularized into the liquid crystal display module by the case top, the support main and the cover bottom.

Recently, the liquid crystal display device has been widely used in various fields such as a desktop computer monitor and a wall-mounted television as well as a portable computer, so that it has a wide display area and researches for realizing a liquid crystal display device having a narrow bezel However, there is a limitation in narrowing the bezel as the front edge of the liquid crystal panel is surrounded by the case top.

An object of the present invention is to provide a liquid crystal display device capable of realizing a narrow bezel through a filler and capable of stably bonding a liquid crystal panel and a backlight unit to each other.

Another object of the present invention is to provide a liquid crystal display device having reliability that can protect a liquid crystal panel from an external impact by allowing a fixer fixed by a case tower to provide a space in which a liquid crystal panel is caused to flow by an external impact .

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a liquid crystal panel; A fixer attached along the back edge of the liquid crystal panel and having a through groove at the center; A backlight unit for supplying light to the liquid crystal panel; A support main body disposed between the liquid crystal panel and the backlight unit and having a support groove formed along an outer surface thereof; And a top case including a vertical part covering a side surface of the support main body and a horizontal part perpendicular to the vertical part and being coupled to a side of the support main body, wherein a horizontal part of the top case has a first And a second horizontal portion that is seated in the horizontal portion and the support groove of the support main body.

Here, the height of the penetration groove of the fixture is higher than the thickness of the horizontal portion of the top case, thereby providing a flow space through which the liquid crystal panel can flow through the penetration groove.

Wherein the support groove has a first support groove formed to have a first height corresponding to the entire height of the fixture in a first area to which the fixture is coupled and a second support groove having a lower height than the first height, And a second support groove formed to have a second height.

In this case, the second height is equal to the sum of the thicknesses of the flow space and the horizontal portion.

And a third portion connecting the first portion and the second portion, the first portion being in contact with the back surface of the liquid crystal panel, the second portion being opposed to the first portion, .

As described above, according to the liquid crystal display device according to the embodiment of the present invention, the case top can be coupled to the side of the support main by supporting the liquid crystal panel through the picture.

As a result, the front edge of the liquid crystal panel is not surrounded by the top case, thereby realizing a narrow bezel and a liquid crystal display having a beautiful appearance.

In addition, the liquid crystal panel can be protected from external impact by providing a space in which the liquid crystal panel can be moved by keeping the flow gap between the fixture and the case tower constant. As a result, even when an external impact is applied, an egg mura, which is a screen unevenness that can be generated as a part of the liquid crystal panel is pressed, can be prevented.

1 is a side perspective view showing a part of a liquid crystal display device according to an embodiment of the present invention.
Fig. 2 is a side view of Fig. 1; Fig.
3 is a perspective view illustrating a fixer attached to a liquid crystal panel according to an embodiment of the present invention.
4 is a cross-sectional view taken along line A-A 'of FIG. 2;
5 is a sectional view taken along line B-B 'of FIG. 2;
6 is a perspective view showing a state in which a case top is omitted in the liquid crystal display device shown in FIG. 1;

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

FIG. 1 is a perspective view showing a side surface of a liquid crystal display device according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a perspective view showing a fixer attached to a liquid crystal panel according to an embodiment of the present invention, FIG. 4 is a cross-sectional view taken along line A-A 'of FIG. 2, FIG. 5 is a cross-sectional view taken along line B-B' of FIG. 2, Is a perspective view showing the omitted state.

The liquid crystal display device 100 includes a liquid crystal panel 110, a backlight unit 120, a support main body 130 for modularizing the liquid crystal panel 110 and the backlight unit 120, 150, a case top 140, and a picker 170.

The liquid crystal panel 110 is a part that plays a key role in image display and is composed of a first substrate 112 and a second substrate 114 which are bonded to each other with a liquid crystal layer interposed therebetween.

Although not shown in the drawing, a plurality of gate lines and data lines cross each other on the inner surface of a first substrate 112, which is usually referred to as a lower substrate or an array substrate, on the premise of an active matrix system, pixels are defined, And a thin film transistor (TFT) is provided and connected in a one-to-one correspondence 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 substrate, a color filter of red (R), green (G), and blue (B) And a black matrix for covering non-display elements such as a gate line, a data line, and a thin film transistor.

A transparent common electrode corresponding to the pixel electrode may be provided on the first substrate 112 or the second substrate 114.

The first and second polarizers 119a and 119b, which selectively transmit only specific light, are attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

Although not shown, a driving printed circuit board is connected to at least one edge of the liquid crystal panel 110 via a flexible circuit board or a connection member such as a tape carrier package (TCP) To the side of the support main body 130 or to the back surface of the cover bottom 150, as shown in FIG.

When the thin film transistor selected for each gate line is turned on by the ON or OFF signal of the gate driving circuit transmitted through the driving printed circuit board (not shown), the liquid crystal panel 110 having the above- The signal voltage of the liquid crystal molecules is transmitted to the corresponding pixel electrode through the data line and the alignment direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode.

A plurality of projectors 170 are provided along the back edge of the liquid crystal panel 110.

Here, the plurality of the projectors 170 are attached along the rear edge of the liquid crystal panel 110 during the modularization process and support the liquid crystal panel 110.

The positions of the plurality of the projectors 170 are fixed by the support case 130 and the top case 140 coupled to the backlight unit 120 through the side surfaces of the backlight unit 120. As a result, So that it can be realized as a low-bezel. In the present invention, the top case 140 is coupled with the side surface of the backlight unit 120 by using the filler 170 in the present invention, .

In addition, the plurality of the projectors 170 serve to provide a fluid space G in which the liquid crystal panel 110 can be moved by an external impact.

Each of the plurality of the projectors 170 includes a first portion 172 in contact with the liquid crystal panel, a second portion 174 facing the first portion 172, and a penetrating groove 175 penetrating at the center And a third portion connecting the first portion 172 and the second portion 174 through each of both edges of the through groove 175.

Accordingly, each of the plurality of the projectors 170 may have a rectangular shape having a through-hole 175 at the center thereof.

The through groove 175 is a constituent that allows a horizontal space 144 of the top case 140 to be inserted while providing a fluid space G through which the liquid crystal panel 110 can flow. This will be described in detail later.

The back surface of the liquid crystal panel 110 is provided with a backlight unit 120 that supplies light to display the difference in transmittance as an image.

The backlight unit 120 includes a plurality of LED assemblies 129, a reflector 121 positioned on the plurality of LED assemblies 129, a diffuser plate 124 located on the top of the reflector 121, And a plurality of optical sheets 126 positioned on top of the optical sheet 124.

Each of the plurality of LED assemblies 129 is formed by mounting a plurality of LEDs 129a on an LED printed circuit board (PCB) 129b with a predetermined distance therebetween.

The plurality of LED assemblies 129 are arranged on the cover bottom 150 in a state of being spaced apart from each other by a predetermined distance. The plurality of LED assemblies 129 are arranged along the longitudinal direction of the cover bottom 150 or along the direction perpendicular to the longitudinal direction. Can be arranged side by side.

The LED printed circuit board 129b on which the plurality of LEDs 129a are mounted may correspond to a metal core printed circuit board having a heat dissipating function. A heat sink (not shown) may be provided to allow heat generated from each of the plurality of LEDs 129a to be emitted to the outside.

A reflector 121 for reflecting a part of the light emitted from each of the plurality of LEDs 129a toward the cover bottom 150 toward the liquid crystal panel 110 is disposed on the LED printed circuit board 129b .

The reflector 121 includes a plurality of LED through holes 121a corresponding to the plurality of LEDs 129a included in the plurality of LED assemblies 129 through which the plurality of LEDs 129a can pass, Each of the LEDs 129a is exposed through each of the plurality of LED through holes 121a to be exposed on the LED printed circuit board 129c.

The reflection plate 121 may be formed of a white or silver plate.

A diffusion plate 124 for diffusing light is disposed above the reflection plate 121 with an optical gap therebetween.

At this time, the optical gap is an interval necessary for forming light uniformity by diffusing light emitted from each of the plurality of LEDs 129a.

And a plurality of optical sheets 126 are positioned on the diffusion plate 124.

Here, the plurality of optical sheets 126 may include a diffusion sheet, at least one light condensing sheet, and a protective sheet. In this case, a functional sheet such as a dual brightness enhancement film called a dual brightness enhancement film (DBEF) capable of increasing brightness can be included in one of the plurality of optical sheets to increase the brightness of light emitted from the plurality of LEDs 129a have.

The liquid crystal panel 110 and the backlight unit 120 having the above-described structure are modularized through the fixer 170, the support main 130, the case top 140, and the cover bottom 150.

The support main 130 is positioned between the liquid crystal panel 110 and the backlight unit 120 to separate the liquid crystal panel 110 from the backlight unit 120 and fix the position of the case top 140 .

The support main body 130 has a support groove 132 formed along the outer surface thereof. The support groove 132 is formed to have a predetermined depth inward from the outer side surface.

The case top 140 is perpendicular to the vertical portion 142 and the vertical portion 142 covering the side surface of the support main body 130 and inserted into the through groove 175 of the fixture 170, And a horizontal portion 144 formed to be insertable into the groove 132.

For example, the case top 140 may have a rectangular frame shape bent in a shape.

The cover bottom 150 on which the liquid crystal panel 110 and the backlight unit 120 are mounted and which is the basis for assembling the entire structure of the liquid crystal display module 100 is formed into a square plate shape with a cover bottom 150, And a pair of side supports (not shown) in the form of a pair of bars which are coupled to opposite ends of the opposite side edges of the side support.

The remaining two edges of the cover bottom 150 except for the side supports (not shown) may be bent obliquely to have the same height as the bottom edges of the cover bottom 150 to form a predetermined space in which the backlight unit 120 can be seated .

The liquid crystal panel 110 is supported by the picker 170 and the backlight unit 120 is supported by the support main 130 so as to surround the support main 130, And the cover bottom 150 covering the back surface of the backlight unit 120 are coupled at the side and back of the backlight unit 120 respectively And is integrated as a module through the support main 130 and the picker 170.

At this time, the case top 140, the support main 130, and the cover bottom 150 may be fastened with the screws 190 through the fastening grooves 192 provided for each of the fasteners.

The light emitted from each of the plurality of LEDs 129a of the backlight unit 120 is reflected by the reflection plate 121, the diffuser plate 124 and the plurality of optical sheets 126 to the liquid crystal panel 110 And the liquid crystal panel 110 displays the high-luminance image as an image using the image.

A pad 165 may be provided between the support main 130 and the liquid crystal panel 110 or more precisely between the support main 130 and the edge of the first substrate 112.

Here, the pad 165 may be made of a material having adhesiveness and elasticity.

The pad 165 serves to prevent the liquid crystal panel 110 from flowing to the left and right by fixing the liquid crystal panel 110 to the support main body 130 and to prevent the liquid crystal panel 110 and the backlight unit 120 And may protect the first substrate 112 in the process of modularization.

In the liquid crystal display device 100 according to the present invention having the above-described structure, since the horizontal portion 144 of the top case 140 is inserted into the support groove 132 of the support main body 130, And the liquid space G of the liquid crystal panel 110 is provided through the fixture 170 fixed by the case top 140 and the support main body 130.

This will be described in more detail with reference to FIGS. 4 to 6. FIG.

First, the support groove 132 provided in the support main 130 is composed of a first support groove 132a and a second support groove 132b.

First, the first area FA to which the picker 170 is coupled has a first height H1 corresponding to the entire height of the picker 170, so that the first face and the second face adjacent to the first face are opened A first support groove 132a is formed. At this time, the fixer 170 is positioned between the liquid crystal panel 110 and the support main 130 by placing the fixture 170 in the first support groove 132.

A second height H2 lower than the first height H1 is formed in the second area TCA except for the first area FA so that the horizontal part 144 of the top case 140 can be inserted and fixed. The second support groove 132 having the first surface opened is formed. The second height H2 may be equal to the sum of the thickness of the horizontal space 144 of the top case 140 and the flow space G for protecting the liquid crystal panel 110.

The horizontal portion 144 of the top case 140 is inserted into the support groove 132 of the support main body 130 and the first horizontal portion 144a inserted into the through groove 175 of the picker 170 And the remaining second horizontal portion 144b.

The top case 140 is seated in the second support groove 132b of the support main body 130 so that the position of the top case 140 is prevented from being struck by the top case 140, A part of the through groove 175 of the liquid crystal panel 170 can be kept constant in the flow space G of the liquid crystal panel 110. That is, the height of the through hole 175 of the filler 170 is higher than the thickness of the horizontal portion 144 of the top case 140, and the through hole 175 The first horizontal portion 144a is positioned and its position is fixed.

If the position of the case top 140 is not fixed in the state where the support main groove 130 is not provided in the support main body 130, Through the penetration groove 175 of the picker 170. As shown in FIG. At this time, due to the downward force of the case top 140, the case top 140 and the fixer 170 are struck down together and the edges of the liquid crystal panel 110 are struck, The liquid crystal panel 110 may be separated from the liquid crystal panel 110. [ Further, there is a problem that the flow space of the liquid crystal panel 110 provided by the filler 170 can not be kept constant as the case top 140 is struck.

In contrast, in the present invention, the position of the case top 140 is fixed through the support groove 132 of the support main 130, and the position of the fixture 170 is fixed by the case top 140 and the support main 130 The floating space G for the liquid crystal panel 110 can be uniformly provided through the filler 170.

The cover main body 130 may be referred to as a guide panel or a main support or a mold frame. The cover main body 130 may be referred to as a bottom cover, I will.

Although the direct-type liquid crystal display device in which the light source is positioned below the liquid crystal panel has been described above, the present invention is not limited to this, and the liquid crystal display device of the side- , The support main and the top case, it is apparent that the narrow bezel can be implemented.

That is, the embodiments of the present invention described above are merely illustrative, and those skilled in the art can freely make modifications without departing from the gist of the present invention. Accordingly, the protection scope of the present invention includes modifications of the present invention within the scope of the appended claims and equivalents thereof.

100: liquid crystal display device 110: liquid crystal panel
120: backlight unit 121: reflector
124: diffuser plate 126: multiple optical sheets
129: LED assembly 130: support main
132: support groove 140: top case
142: vertical part 144: horizontal part
150: Cover Bottom 170: Fixer
175: Through groove

Claims (5)

A liquid crystal panel;
A fixer attached along the back edge of the liquid crystal panel and having a through groove at the center;
A backlight unit for supplying light to the liquid crystal panel;
A support main body disposed between the liquid crystal panel and the backlight unit and having a support groove formed along an outer surface thereof;
And a top case including a vertical portion covering a side surface of the support main body and a horizontal portion perpendicular to the vertical portion and being coupled to a side surface of the support main body,
Wherein the horizontal portion of the top case includes a first horizontal portion inserted into the through hole of the fixture and a second horizontal portion seated in the support groove of the support main.
The method according to claim 1,
Wherein a height of the penetration groove of the fixture is higher than a thickness of a horizontal portion of the top case, thereby providing a fluid space through which the liquid crystal panel can flow through the penetration groove.
3. The method of claim 2,
Wherein the support groove has a first support groove formed to have a first height corresponding to the entire height of the fixture in a first area to which the fixture is coupled and a second support groove having a lower height than the first height, And a second support groove formed to have a second height.
The method of claim 3,
Wherein the second height is equal to a sum of the thickness of the flow space and the thickness of the horizontal portion.
The method according to claim 1,
And a third portion connecting the first portion and the second portion, the first portion being in contact with the back surface of the liquid crystal panel, the second portion being opposed to the first portion, And the liquid crystal display device.

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