KR101423516B1 - Liquid crystal display device module - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a modularization of a liquid crystal display device.

The present invention modulates a liquid crystal panel, a plurality of optical sheets and a diffusion sheet into a first assembly through a top cover, a guide panel, and a supporter, and a reflective sheet, a plurality of lamps and a pair of support sides, Modularized, and then modularized into a single unit to complete the liquid crystal display module.

Therefore, when the lamp of the backlight unit is to be replaced, the lamp can be easily replaced by separating the second assembly and the first assembly.

This prevents the risk of damaging the liquid crystal panel, the plurality of optical sheets, and the diffuser plate when the lamp is replaced, and after the replacement of the lamp, it is possible to easily reassemble them, .

Guide panel, supporter, cover bottom, top cover, liquid crystal display

Description

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a modularization of a liquid crystal display device.

2. Description of the Related Art In recent years, the display field has rapidly developed in line with the information age. In response to this trend, a flat panel display device (FPD) having a thinness, light weight, A plasma display panel (PDP), an electroluminescence display device (ELD), and a field emission display device (FED) : CRT).

Among these, liquid crystal display devices are excellent in moving picture display and are most actively used in the fields of notebooks, monitors, and TV due to their high contrast ratios. Such liquid crystal display devices have no self-luminous elements, A light source is required.

Accordingly, a backlight unit having a lamp is provided on the back surface, and light is irradiated toward the front of the liquid crystal panel, thereby realizing an image of a brightness that can be recognized only through the backlight unit.

In general, an ordinary backlight unit is divided into an edge type and a direct type according to the arrangement structure of the lamp. The edge type has a structure in which one or a pair of lamps are disposed on one side of the light guide plate, Two or two pairs of lamps are disposed on both side portions of the light guide plate, and the direct type lamp has a structure in which several lamps are disposed under the optical sheet.

In recent years, in a state in which research of a large-sized liquid crystal display device is actively pursued by a consumer, the direct-down type is more suitable for a large-sized liquid crystal display device than an edge type.

1 is a cross-sectional view of a liquid crystal display device using a general direct type backlight unit.

As shown in the figure, a typical liquid crystal display device is provided with a liquid crystal panel 10 composed of first and second substrates 12 and 14 and a backlight unit 20 behind the liquid crystal panel 10.

Here, the backlight unit 20 includes a reflective sheet 22, and a plurality of lamps 24 are arranged side by side on the upper surface of the backlight unit 20. A plurality of optical sheets 28 are disposed on the lamps 24 .

The liquid crystal panel 10 and the backlight unit 20 are modularized through the top cover 40, the guide panel 30 and the cover bottom 50, that is, the edges of the liquid crystal panel 10 and the backlight unit 20 A top cover 40 covering the front edge of the liquid crystal panel 10 and a cover bottom 50 covering the back surface of the backlight unit 20 are coupled to the guide panel 30 in a front- 30).

That is, the top cover 40 is coupled to the guide panel 30 through a fixing member (not shown) such as a screw or the like, and the guide panel 30 includes a cover bottom 50 and a fixing member (not shown) such as a screw The liquid crystal display device is modularized.

The lamp 24 used as the light source of the backlight unit 20 may be a fluorescent lamp such as a cathode cathode fluorescent lamp or an external electrode fluorescent lamp.

Such a lamp 24 is formed of a glass material so that breakage is frequent and can not be used after a certain period of time as a consumable item, so that the lamp 24 must be replaced.

However, in order to replace the lamp 24, the backlight unit 20 and the liquid crystal panel 10 must be separated from each other.

In order to replace the lamp 24, a fixing member (not shown) such as a screw that fastens the top cover 40 and the guide panel 30 is disassembled and the guide panel 30 and the top cover The liquid crystal panel 10 separated from the edge is separated by the guide panel 30 and the top cover 40.

Next, the guide panel 30 and the cover bottom 50 are separated from each other by disassembling the fixing member (not shown) such as a screw that fastens the guide panel 30 and the cover bottom 50 to separate the guide panel 30 To separate the plurality of optical sheets 28 surrounded by the edges.

When the plurality of optical sheets 28 are separated, the lamp 24 located under the plurality of optical sheets 28 can be replaced.

That is, the lamp 24 can be replaced only when the liquid crystal display device sequentially separates the top cover 40, the liquid crystal panel 10, the guide panel 30, and the plurality of optical sheets 28 in order.

Therefore, the process of disassembling the liquid crystal display module for replacing the lamp 24 is too complicated to reduce the efficiency of the process, and there is a fear that the liquid crystal panel 10 and the plurality of optical sheets 28 may be damaged during the decomposition process .

Further, after the replacement of the lamp 24, the disassembly process is carried out in reverse order and then assembled, so that the process time of the LCD module for replacing the lamp 24 as a whole is increased. .

SUMMARY OF THE INVENTION It is a first object of the present invention to easily disassemble and assemble a backlight unit and a liquid crystal panel when replacing a lamp of a backlight unit.

Another object of the present invention is to prevent damage to the liquid crystal panel and the plurality of optical sheets when the lamp of the backlight unit is replaced.

It is a third object of the present invention to improve the efficiency of the process by shortening the reassembling time of the backlight unit and the liquid crystal panel after the lamp replacement.

In order to achieve the above-mentioned object, the present invention provides a liquid crystal display comprising: a liquid crystal panel; a first assembly in which a plurality of optical sheets are integrally modulated by a top cover, a guide panel and a supporter; And a second assembly that is assembled with the first assembly and includes a reflective sheet, a plurality of lamps, and a pair of support sides that are modularized integrally with the cover bottom.

In this case, the first assembly may be configured such that the guide panel covers the edges of the liquid crystal panel, the plurality of optical sheets, and the diffuser plate, and the top cover and the supporter are fixed to the front and rear sides of the guide panel And the supporter is formed in a rectangular frame shape supporting a part of the rear edge of the plurality of optical sheets.

In this case, the width of the supporter is narrower than the width of the guide panel, and the supporter has a thickness of 1.0 to 1.2 mm.

In addition, the supporter is characterized by being made of an aluminum or electrolytic galvanized iron (EGI) mold having high strength and excellent corrosion resistance, wherein the supporter has a first count screw hole having an internal thread on its inner surface, A first screw hole corresponding to the first count screw hole is formed on the top cover and a first through hole through which the first count screw hole passes is formed in the guide panel. do.

In this case, it is preferable that a diffuser plate is further provided on the back surface of the plurality of optical sheets of the first assembly, the second assembly includes the reflective sheet on the cover bottom, And the support side for fixing both ends of the plurality of lamps is formed by assembling together through a fixing member such as a cover bottom and a screw, and a second count screw having an inner surface formed with a female screw, A second screw hole corresponding to the second count screw hole is formed in the top cover, and a second through hole through which the second count screw hole passes is formed in the guide panel .

As described above, in the present invention, the liquid crystal display module is firstly divided into the first assembly (panel assembly) and the second assembly (modularization), and then the modules are integrally modularized, When the user wants to replace the lamp, the second assembly and the first assembly can be separated from each other and the lamp can be easily replaced.

This prevents the risk of damaging the liquid crystal panel, the plurality of optical sheets, and the diffuser plate when the lamp is replaced, and after the replacement of the lamp, it is possible to easily reassemble them, There is an effect to be improved.

In addition, when a failure of the backlight unit occurs, the first assembly can be assembled to the second assembly without defects, and the efficiency of the process can be further improved.

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

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

The liquid crystal display module includes a liquid crystal panel 110, a backlight unit 120, a guide panel 130, a supporter 160, a cover bottom 150, , And a top cover (140).

First, the liquid crystal panel 110 plays a key role in image display and includes first and second substrates 112 and 114 which are bonded to each other with a liquid crystal layer interposed therebetween.

At this time, a plurality of gate lines and data lines intersect on the inner surface of the first substrate 112, which is usually called a lower substrate or an array substrate, although a pixel is not clearly shown in the figure, And a thin film transistor (TFT) is provided at each intersection point, and is connected to the transparent pixel electrode formed in each pixel in a one-to-one correspondence manner.

On the inner surface of the second substrate 114, which is called an upper substrate or a color filter substrate, color filters of R, G, and B colors corresponding to the respective pixels, a gate line and a data line, And a black matrix covering a non-display element such as a thin film transistor is provided. In addition, a transparent common electrode covering these elements is provided.

The printed circuit boards 117a and 117b are connected to each other along at least one edge of the liquid crystal panel 110 via a connecting member 116 such as a flexible circuit board so that, (150).

At this time, a timing controller, a gamma voltage generator, and the like are mounted on the printed circuit boards 117a and 117b to primarily process various signal information inputted from an external device such as a computer to generate a signal voltage necessary for image representation, The image signals transferred to the data lines of the liquid crystal panel 110 through the signal voltages transferred from the printed circuit boards 117a and 117b and the scan signals including the on / off signals of the thin film transistors Data for generating and outputting signals and a gate driver IC are mounted.

Therefore, when the selected thin film transistor for each gate line is turned on by the ON / OFF signals of the thin film transistor that is transferred to the gate line, the liquid crystal panel 110 transmits the image signal of the data line to the corresponding pixel electrode, The alignment direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode which is generated due to the difference in the transmittance.

Although not clearly shown in the drawings, the upper and lower alignment films for determining the initial alignment direction of the liquid crystal are interposed at the boundary between the two substrates 112 and 114 of the liquid crystal panel 110 and the liquid crystal layer, A seal pattern is formed along the edges of both the substrates 112 and 114 to prevent leakage of the liquid crystal layer from the first and second substrates 112 and 114, A polarizing plate can be attached.

A backlight unit 120 is provided to supply light from the rear surface of the liquid crystal panel 110 so that the difference in transmittance represented by the liquid crystal panel 110 is externally displayed.

The backlight unit 120 includes a reflective sheet 122 and has a plurality of lamps 124 uniformly arranged on the top surface thereof and a pair of support sidewalls crossing both ends of the plurality of lamps 124 to fix them 128).

A diffusion plate 126 and a plurality of optical sheets 128 are interposed between the lamps 124 and the pair of support sides 128.

Although not shown, it is possible to prevent the central portion of the diffuser plate 126 and the plurality of optical sheets 128 from being sagged, thereby making the distance between the lamps 124 and the diffuser plate 126 constant, (Not shown) capable of preventing the lamp 124 from being shaken and broken.

In this case, the lamp 124 may be a light source such as a fluorescent lamp such as a cathode cathode fluorescent lamp or an external electrode fluorescent lamp. Alternatively, in addition to such a fluorescent lamp, a light-emitting diode lamp may be used as the lamp 124, and a lamp guide (not shown) may be omitted when the light-emitting diode lamp is used.

The reflective sheet 122 is disposed on the back surface of the plurality of lamps 124 and reflects light emitted toward the back surface of the lamp 124 toward the liquid crystal panel 110 to improve the brightness of light.

The diffusing plate 126 disposed at a predetermined distance from the lamp 124 allows the light emitted from the plurality of lamps 124 to travel toward the liquid crystal panel 110, And diffuse the light so as to be incident on the light source.

The plurality of optical sheets 128 include a diffusion sheet, at least one light condensing sheet, and the like.

Therefore, the light emitted from the plurality of lamps 124 is uniformly high-quality processed while passing through the diffusion plate 126 and the plurality of optical sheets 128, and is then incident on the liquid crystal panel 110, The panel 110 can display an image of high brightness only.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the top cover 140, the guide panel 130, the supporter 160 and the cover bottom 150. At this time, 1 assembly and a second assembly, modularized, and then modularized into a single unit to complete the liquid crystal display module.

In the meantime, the first and second assemblies will be described in more detail with reference to the drawings.

FIG. 3A is a perspective view schematically illustrating the structure of the first assembly, and FIG. 3B is a view schematically showing a partial cross section of the modulated FIG. 3A.

3A, the first assembly 200 includes a liquid crystal panel 110, a plurality of optical sheets 128, a diffuser plate 126, and a top cover 140 of the backlight unit (120 in FIG. 2) A guide panel 130, and a supporter 160.

That is, the top cover 140 is disposed on the upper portion of the liquid crystal panel 110 composed of the first and second substrates 112 and 114 which are bonded to each other with the liquid crystal layer interposed therebetween, The optical sheet 128 and the diffuser plate 126 are located.

The supporter 160 is positioned on the back surface of the diffuser plate 126 and the edges of the liquid crystal panel 110 and the plurality of optical sheets 128 and the diffuser plate 126 are surrounded by the guide panel 130 .

The first assembly 200 is integrally modularized through a fixing member (not shown) such as a screw or the like.

3B, the guide panel 130 has a rectangular frame shape, and covers the edges of the liquid crystal panel 110, the plurality of optical sheets 128, and the diffusion plate 126, A top cover 140 covering upper and side edges of the guide panel 130 and a supporter 160 supporting a part of the edge of the diffuser plate 126 are fixed to the guide panel 130 through fixing members 166 such as screws, do.

The top cover 140 is formed in a rectangular shape having a cross section bent in a "? "Form so as to cover the top and side edges of the liquid crystal panel 110, As shown in Fig.

In addition, the guide panel 130 has a rectangular shape made of a molding material of synthetic resin, and has a certain shape of a jaw on its inner side, and supports the liquid crystal panel 110 with its upper surface.

At this time, the unexplained reference numerals are polarizers 119 attached to the outer surfaces of the first and second substrates 112 and 114 of the liquid crystal panel 110.

Accordingly, the supporter 160 also has a rectangular frame shape, which will be described in detail with reference to FIGS. 4A to 4B.

As shown in Figs. 4A to 4B, the supporter 160 has a rectangular shape and has a constant width w2 so as to support a part of the back edge of the diffuser plate (126 in Fig. 3A).

At this time, the width w2 of the supporter 160 is stably supported by the edge surfaces of the plurality of optical sheets 128 and the diffuser plate 126 within a range that is not larger than the width w1 of the guide panel 130 It is desirable that the diffuser plate 126 and the plurality of optical sheets 128 are not sagged toward the lamp (124 in FIG. 2).

The thickness t of the supporter 160 is about 1.0 to 1.2 mm so that the liquid crystal panel 110 and the diffuser plate 126 and the plurality of optical sheets 128 can be supported without sagging, So as not to affect the overall thickness of the device module.

Therefore, it is preferable that the supporter 160 is made of an aluminum or electrolytic galvanized iron (EGI) mold having high strength and excellent corrosion resistance.

On the upper surface of the supporter 160, a first count screw hole 162 for assembling and fastening the top cover 140 through a fixing member 166 such as a screw is upwardly protruded.

At this time, a female screw thread is formed on the inner surface of the first count screw hole 162, and a first screw hole 142 corresponding to the first count screw hole 162 is formed in the top cover 140 fastened to the first count screw hole 162 And the guide panel 130 is formed with a first through hole 132 through which the first count screw hole 162 can pass.

The first count screw hole 162 of the supporter 160 is made to correspond to the first through hole 132 of the guide panel 130 and the first screw hole 142 of the top cover 140, And they can be fastened to each other through a fixing member 166 such as a screw.

The reason why the first count screw hole 162 is protruded upward from the upper surface of the supporter 160 is that the liquid crystal panel 110 and the diffuser plate 126 are disposed between the supporter 160 and the top cover 140, Since the plurality of optical sheets 128 are interposed, the supporter 160 and the top cover 140 must be assembled in a state of being spaced apart from each other by a predetermined distance, so that they can be easily assembled by aligning them accurately.

The height of the first count screw hole 162 is set to be higher than the sum of the thicknesses of the liquid crystal panel 110 and the plurality of optical sheets 128 and the diffuser plate 126, It is preferable that the top cover 140 is inserted into the top cover 140 but not exposed to the outside of the top cover 140.

In addition, a hole 164 through which the second count screw hole of the cover bottom 150 can pass is formed on the support 160, which will be described later in connection with the fastening structure of the first assembly 200 and the second assembly I will explain more in detail.

A plurality of optical sheets 128 of the liquid crystal panel 110 and the backlight unit 120 and the diffuser plate 126 are modularized through the top cover 140, the guide panel 130 and the supporter 160, 1 assembly 200 is completed.

FIG. 5A is a perspective view schematically illustrating the structure of the second assembly, and FIG. 5B is a view schematically showing a partial cross section of the modulated FIG. 5A.

5A, the second assembly 300 includes a cover bottom 150, a reflective sheet 122, a plurality of lamps 124, and a pair of support sides 128.

That is, the reflective sheet 122 is seated on the cover bottom 150 composed of the bottom surface of the plate shape and the side where the two edges thereof are bent obliquely upward, and a plurality of lamps 124 are constantly .

A pair of support sidewalls 128, which cross both ends of the plurality of lamps 124, are positioned.

The lamp 124 may further include a plurality of lamp guides (not shown) which are not shown but can prevent the lamp 124 from being shaken and broken by an impact, The backlight driving circuit (not shown) is provided on the backside of the cover bottom 150 to minimize the mounting area. The backlight driving circuit (not shown) is provided outside the backlight driving circuit (not shown).

5B, the second assembly 300 is provided at both ends of the plurality of lamps 124, and a support side 128 for fixing the lamps 124 is fixed to the cover bottom 150, The second assembly 300 is completed by assembling through the fixing member 154 of the first assembly 300.

Hereinafter, the fastening state of the first assembly and the second assembly will be described in more detail with reference to FIGS. 6A to 6B.

6A and 6B show only one portion of the liquid crystal display module, but it is easy to expect that the configuration of the opposite portion is also the same.

6A, a reflective plate 122, a plurality of lamps 124, and a pair of support sides (not shown) are integrally modularized on the cover bottom 150, A first assembly 200 in which a plurality of optical sheets 128 and a diffusion plate 126 are modularized through a top cover 140, a guide panel 130 and a supporter 160 are positioned.

At this time, a second count screw hole 152 having an internal thread formed on the inner surface thereof is projected upward to be assembled via a fixing member 156 such as a screw and a top cover (140 in FIG. 3B) on the side surface of the cover bottom 150 .

A second screw hole 144 corresponding to the second count screw hole 152 is formed in the top cover 140 engaged with the second cover screw hole 152. A second count screw hole 152 is formed in the guide panel 130, A second through hole 134 is formed.

6b, the second count screw hole 152 of the cover bottom 150 is engaged with the second through hole 134 of the guide panel 130 and the second screw hole 144 of the top cover 140 And then they are assembled together through a fixing member 156 such as a screw.

The reason why the second count screw hole 152 is protruded upward from the side surface of the cover bottom 150 is that the first count screw hole 162 formed in the supporter 160 is protruded upward Do.

Thus, the second assembly 300 is aligned and assembled with the first assembly 200 through the second count screw hole 152 to complete the LCD module.

The height of the second count screw hole 152 is higher than the thickness of the first assembly 200 and is inserted into the second screw hole 144 of the top cover 140. However, .

At this time, the unexplained reference numerals are polarizers 119 attached to the outer surfaces of the first and second substrates 112 and 114 of the liquid crystal panel 110.

Also, the top cover 140 may be referred to as a case top or a top case, and the guide panel 130 may be referred to as a support main or main support, and the cover bottom 150 may be referred to as a bottom cover.

The liquid crystal panel 110, the plurality of optical sheets 128 and the diffuser plate 126 are modularized into a single module through the top cover 140, the guide panel 130 and the supporter 160, The cover body 150 and the reflector sheet 122 and the plurality of lamps 124 are modularized to form a second assembly 300. The second assembly 300 is then assembled through a fixing member 156 such as a screw When the lamp 124 of the second assembly 300 is broken or the life of the lamp 124 is short and the lamp 124 is to be replaced, the second assembly 300 and / The lamp 124 can be easily replaced by detaching the first assembly 200.

That is, in order to replace the lamp 124, the top cover 140 and the guide panel 130 are disassembled to separate the liquid crystal panel 110, and the guide panel 130 and the cover bottom 150 are disassembled The lamp 124 can be replaced only by separating the plurality of optical sheets 128 and the diffuser plate 126. The present invention can be applied to a case in which the first assembly 200 and the second assembly 300, It is possible to replace the lamp 124 of the second assembly 300 by disassembling only the fixing member 156 of the second assembly 300.

Particularly, there has been a risk that the liquid crystal panel 110, the plurality of optical sheets 128 and the diffuser plate 126 may be damaged when the lamp 124 is replaced. However, in the present invention, 130) and the supporter 160 to prevent the occurrence of the same problem as the conventional one.

Also, since the second assembly 300 and the first assembly 200 can be easily assembled again after the lamp 124 is replaced, the process time is shortened and the process efficiency is improved.

2) and the liquid crystal panel 110 are separated from each other so that the liquid crystal panel 110 is connected to the backlight unit (refer to FIG. 2) (120) of the present invention, thereby improving the efficiency of the process.

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

1 is a sectional view of a liquid crystal display device using a general direct-type backlight unit.

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

Figure 3a is a perspective view schematically illustrating the structure of a first assembly;

Figure 3b is a cross-sectional view schematically showing a partial cross-section of the modular figure 3a;

4A is a perspective view schematically showing a structure of a supporter according to an embodiment of the present invention.

4B is an enlarged view of the area A in Fig. 4A. Fig.

5A is a perspective view schematically illustrating the structure of a second assembly;

Figure 5b is a cross-sectional view schematically illustrating a partial cross section of Figure 5a modular.

6A-6B are partial cross-sectional views schematically illustrating the fastening views of the first and second assemblies;

Claims (10)

A liquid crystal panel, a first assembly in which a plurality of optical sheets are integrally modulated by a top cover, a guide panel, and a supporter; A second assembly assembled with the first assembly, wherein the reflective sheet, the plurality of lamps, and the pair of support sides are integrally modularized with the cover bottom, Wherein the first count screw hole is protruded upward from the supporter, the cover bottom has a second count screw hole protruded upward, and the guide panel is provided with a first count screw hole A through hole, and a second through hole through which the second count screw hole passes. The method according to claim 1, The first assembly is formed by assembling the front cover and the supporter in front and rear of the guide panel through fixing members such as screws in a state in which the guide panel covers the edges of the liquid crystal panel and the plurality of optical sheets And the liquid crystal display module. 3. The method of claim 2, Wherein the supporter has a rectangular frame shape that supports a part of the rear edge of the plurality of optical sheets. The method of claim 3, Wherein a width of the supporter is narrower than a width of the guide panel. The method of claim 3, Wherein the supporter has a thickness of 1.0 to 1.2 mm. The method of claim 3, Wherein the supporter is made of an aluminum or electrolytic galvanized iron (EGI) mold having excellent strength and corrosion resistance. The method according to claim 1, Wherein a first screw hole corresponding to the first count screw hole is formed on the inner surface of the first count screw hole, and a first screw hole corresponding to the first count screw hole is formed on the top cover. The method according to claim 1, Further comprising a diffusion plate on the back surface of the plurality of optical sheets of the first assembly. The method according to claim 1, Wherein the second assembly is configured such that the reflective sheet is seated on the cover bottom, the plurality of lamps are arranged on the reflective sheet, and the support side fixing the both ends of the plurality of lamps is fixed to the cover bottom, And the first and second substrates are assembled through a member. The method according to claim 1, And a second screw hole corresponding to the second count screw hole is formed in the top cover. The liquid crystal display module according to claim 1, wherein the second count screw hole is formed in the inner surface of the second count screw hole.

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