KR20060061869A - Liquid crystal display having warp-proofing function - Google Patents

Abstract

There is provided a liquid crystal display device which can prevent the chassis from bending due to an external impact. Such a liquid crystal display device includes a liquid crystal display panel assembly having a TFT panel displaying image information, an integrated printed circuit board having a peripheral circuit for processing gate driving signals and data driving signals required for driving the TFT panel, and the TFT panel. A backlight unit having a lamp for providing a light source to the light source, and a side wall formed along an edge of an upper surface thereof to accommodate the liquid crystal display panel assembly and the backlight unit in the side wall, and an upper hook formed along an upper surface of the side wall. The chassis may include a mold frame and an upper hook coupling hole formed on the upper surface of the liquid crystal display panel assembly to be coupled to the mold frame and formed on the upper surface corresponding to the upper hook.

LCD, chassis, mold frame, hook

Description

Liquid crystal display having warp-proofing function against external shock

1 is an exploded perspective view showing a liquid crystal display device according to the present invention.

FIG. 2 is a perspective view illustrating a liquid crystal display including a liquid crystal display panel assembly, a mold frame in which a backlight unit is accommodated, and a chassis positioned on the mold frame, according to the first embodiment of the present invention.

3 is a partial cross-sectional view taken along line AA ′ after assembling the liquid crystal display of FIG. 2.

4 is a perspective view illustrating a liquid crystal display device including a liquid crystal display panel assembly according to a second embodiment of the present invention, a mold frame in which a backlight unit is accommodated, and a chassis positioned above the mold frame.

FIG. 5 is a partial cross-sectional view taken along line AA ′ after assembling the liquid crystal display of FIG. 4.

FIG. 6 is a perspective view illustrating a liquid crystal display device including a liquid crystal display panel assembly, a mold frame in which a backlight unit is accommodated, and a chassis positioned on the mold frame, according to a third embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)                 

100: liquid crystal display 110: chassis

130: liquid crystal display panel assembly 131: gate tape carrier package

132: data tape carrier package 133: TFT panel

134: Curly filter substrate 135: Integrated printed circuit board

140: backlight unit 141: optical sheets

142: light guide plate 143: lamp assembly

144: reflector 150: mold frame

200: liquid crystal display device 210: side hook insertion hole

220: user hole 230: upper hook insertion hole

240: side hook 250: top hook

260: screw 400: liquid crystal display device

420: user hole 430: upper hook insertion hole

450: upper hook 600: liquid crystal display device

620: user hall 621: user hall

630: upper hook insertion hole 631: upper hook insertion hole

650: top hook 651: top hook

The present invention relates to a liquid crystal display device, and more specifically, to prevent the chassis from bending due to an external impact, a hook is formed on the upper part of the mold frame to fix the mold frame and the chassis to improve light uniformity. Relates to a device.

Cathode ray tube (CRT), which is one of the display devices that are generally used, is mainly used for monitors such as televisions, measuring devices, information terminal devices, etc., but due to its own weight and size, It could not actively respond to the demand for miniaturization and weight reduction.

In order to replace the cathode ray tube, it has advantages such as small size, light weight, low power consumption, and the like, and a liquid crystal display device that displays information by using the electrical and optical properties of the liquid crystal injected into the liquid crystal panel has been actively developed. Recently, it plays a role as a flat panel display device. In general, a liquid crystal display device is a display device having low power consumption, light weight, and small volume. The liquid crystal display device has been widely applied to a wide range of industries, for example, the computer industry, the electronics industry, and the information and communication industry due to such unique advantages. As a matter of fact, the liquid crystal display device having such advantages has been applied to various fields such as a display device of a portable computer, a monitor of a desktop computer, a monitor of a high-definition video device, and the like.

The liquid crystal display is largely divided into twisted nematic (TN) and super-twisted nematic (STN) methods, and the active matrix display method using a switching element and a TN liquid crystal and a passive matrix using an STN liquid crystal due to the difference in driving method. There is a passive matrix display method.                         

The big difference between these two methods is that the active matrix display method is used for TFT-LCD, which drives the LCD using the TFT as a switch, and the passive matrix display method does not use transistors, thus requiring a complicated circuit. Do not LCDs using TFTs are widely used in recent years with the spread of portable computers.

Such a liquid crystal display device includes a liquid crystal display panel assembly including a TFT panel for displaying image information, a backlight unit including a lamp for providing a light source to the TFT panel, a mold frame for accommodating the liquid crystal display panel assembly and the backlight unit; The chassis covers an upper portion of the liquid crystal display panel assembly and is coupled to the mold frame. Here, a user hole is formed on the outer surface of the chassis to physically couple with the external device, and is coupled to the external device by a screw.

Since the light emitted from the backlight unit configured as described above is incident to the liquid crystal display panel assembly, a large amount of light is lost and the amount of light actually used to drive the TFT panel is small, so that the brightness and the light uniformity are maintained in the liquid crystal display device. It is important to do.

However, as the liquid crystal display device becomes slimmer, the chassis thickness becomes thinner and as the liquid crystal display device becomes larger, the chassis size becomes larger. As the external shock and time elapse, the chassis bends toward the backlight unit, resulting in light uniformity. Is lowered. In particular, as mentioned above, when screwing through a user hole to couple the LCD to an external device, a force is applied to the outside of the chassis to promote deformation of the upper surface of the chassis, and As the battery is bent toward the backlight unit, the chassis may press the backlight unit positioned below, thereby degrading the uniformity of light.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a liquid crystal display device capable of preventing structural deformation of a chassis coupled to a mold frame by external impact.

The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a liquid crystal display (LCD) device, which includes a TFT panel displaying image information and a peripheral circuit for processing a gate driving signal and a data driving signal required for driving the TFT panel. A backlight unit including a liquid crystal display panel assembly having a circuit board, a lamp providing a light source to the TFT panel, and a sidewall formed along an edge of an upper surface thereof to accommodate the liquid crystal display panel assembly and the backlight unit in the sidewall. And a mold frame having a rectangular hook having an upper hook formed along an upper surface of the side wall, and a chassis having an upper hook coupling hole formed on the upper surface of the liquid crystal display panel assembly to be coupled to the mold frame and corresponding to the upper hook. do.                     

Here, the upper hook may be formed along a side wall formed along the short side and / or long side of the mold frame.

The mold frame has side hooks formed along an outer surface of the sidewall of the mold frame, the chassis has side hook coupling holes formed at sides corresponding to the side hooks, and the top hook has side hooks formed therein. It may be formed along the upper surface of the side wall.

In addition, the chassis may be formed with a user hole on the side to be coupled to the external device, the upper hook may be formed along the upper surface of the side wall of the mold frame corresponding to the side of the chassis in which the user hole is formed.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 6.

1 is an exploded perspective view illustrating a liquid crystal display according to the present invention.                     

Referring to FIG. 1, the liquid crystal display device 100 according to the present invention generally includes a liquid crystal display panel assembly 130, a backlight unit 140, a chassis 110, and a mold frame 150.

Here, the liquid crystal display panel assembly 130 includes a TFT panel 133, a liquid crystal display panel including a color filter substrate 134, a liquid crystal (not shown), a gate tape carrier package 131, and a data tape carrier package 132. And an integrated printed circuit board 135.

The liquid crystal display panel includes a TFT panel 133 including a gate line (not shown) and a data line (not shown), a thin film transistor, a pixel electrode, and the like, and a TFT panel 133 having a size slightly smaller than that of the TFT panel 133. It includes a color filter substrate 134 installed to face.

The gate tape carrier package 131 is connected to each gate line formed in the TFT panel 133, and the data tape carrier package 132 is connected to each data line (not shown) formed in the TFT panel 133.

Meanwhile, the integrated printed circuit board 135 may process both the gate driving signal and the data driving signal for inputting the gate driving signal to the gate tape carrier package 131 and the data driving signal to the data tape carrier package 132. Several drive components are mounted.

Referring to FIG. 1, the backlight unit 140 according to an exemplary embodiment of the present invention may include an optical sheet 141, a light guide plate 142, a lamp assembly 143, a reflecting plate 144, and the like.

Here, the light guide plate 142 guides the light supplied to the liquid crystal display panel assembly 130. The lamp assembly 143 is inserted into the side of the light guide plate 142 to emit this light. The reflective plate 144 is installed on the lower surface of the light guide plate 142 to reflect the light emitted to the lower portion of the light guide plate 42 upward. The optical sheets 141 are installed on the upper surface of the light guide plate 142 to diffuse and collect light transmitted from the light guide plate 142. Here, in the case of the small liquid crystal display device 100, one lamp is usually installed on the side of the light guide plate 142, but as the liquid crystal display device 100 becomes larger, a plurality of lamps may be provided in one lamp assembly 143 to obtain sufficient luminance. Lamps can be installed. In addition, an inverter (not shown) that supplies power to the lamp of the lamp assembly 143 and the lamp assembly 143 are electrically connected by wires.

In addition, the mold frame 150 stores and fixes the components of the backlight unit 140. The chassis 110 covers the upper surface of the liquid crystal display panel assembly 130 and is coupled to the mold frame 150.

Hereinafter, the liquid crystal display according to the first embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3.

2 illustrates a mold frame 150 in which the liquid crystal display panel assembly 130 and the backlight unit 140 are accommodated, and a chassis 110 positioned on the mold frame 150 according to the first embodiment of the present invention. It is a perspective view which shows the liquid crystal display device 200 containing. 3 is a partial cross-sectional view taken along the line AA ′ after assembling the liquid crystal display 200 of FIG. 2.

2 and 3, the mold frame 150 according to the first exemplary embodiment of the present invention has a rectangular shape, and sidewalls 161 are formed along edges of the upper surface thereof to form a liquid crystal display in the sidewalls 161. The panel assembly 130 and the backlight unit 140 are received. In addition, the chassis 110 is disposed to be coupled to the mold frame 150 to cover the top surface of the liquid crystal display panel assembly 130 accommodated in the mold frame 150. The upper surface of the chassis 110 has a window 112 for exposing the liquid crystal display panel assembly 130 to the outside.

In order to couple the mold frame 150 and the chassis 110, side hooks 240 are formed along the outer surface of the side wall 161 of the mold frame 150, and the side hooks 240 and corresponding side surfaces thereof are formed. Hook insertion hole 210 is formed on the side of the chassis (110). Accordingly, as shown in FIG. 3, as the chassis 110 descends from the top of the mold frame 150, the side hooks 240 formed in the mold frame 150 are inserted into the side hook insertion holes of the chassis 110. The mold frame 150 and the chassis 110 are fastened to 210.

In the first embodiment of the present invention, the side hooks 240 are arranged in the short side direction of the mold frame 150, and the side hook insertion holes 210 are also arranged in the short side direction of the chassis 110. have.

A user hole 220 for coupling an external device (not shown) and the liquid crystal display device 200 is formed at a side of the chassis 110 in a short side direction. The screw 260 is fastened to the user hole 220 to couple the liquid crystal display 200 to an external device (not shown).

When an external force is applied to the liquid crystal display 200, for example, in the process of fastening the screw 260 to the user hole 220, the side surface of the chassis 110 is forced outward as shown in FIG. 3. You will receive 300. As the liquid crystal display device 200 becomes slimmer, the chassis 110 becomes thinner and the size of the chassis 110 becomes larger according to the enlargement of the liquid crystal display device 200. The upper surface of the 110 is bent toward the backlight unit 140.

To prevent this, as shown in FIGS. 2 and 3, the upper hook 250 coupled to the upper surface of the chassis 110 on the upper surface of the side wall 161 formed along the edge of the upper surface of the mold frame 150. ) Is formed to protrude. In addition, an upper hook coupling hole 230 is formed at a position corresponding to the upper hook 250 on the upper surface of the chassis 110 coupled to the mold frame 150.

Here, the height of the upper hook 250 is formed at the same height as the upper surface of the chassis 110 or thinner than the upper surface of the chassis 110 in order to thin the liquid crystal display device 100 so that the upper hook 250 is formed on the chassis. It is preferable not to protrude to the upper surface of the (110).

Preferably, a plurality of upper hooks 250 may be formed by being spaced apart from each other by a predetermined distance in the short side direction of the mold frame 150. Preferably, the upper hook 250 and the upper hook coupling hole 230 may be formed to correspond to the position where the user hole 220 that receives the external force 300 is concentrated. In the first embodiment of the present invention, since the user hole 220 is disposed in the short side direction of the chassis 110, the upper hook 250 and the upper hook coupling hole 230 corresponding to the upper hook 250 may be formed of the mold frame 150 and the upper hook 250. It is preferably formed in the short side direction of the chassis 110.

As such, when the upper hook 250 and the upper hook coupling hole 230 are fastened in the short side direction of the chassis 110 in which the user hole 220 is formed, the user hole 220 is illustrated in FIG. 3. When the screw 260 is fastened to the side of the chassis 110 to receive the force 300 to the outside, the upper hook 250 and the upper hook coupling hole 230 is coupled to the upper surface of the chassis 110 by the mold frame ( 150) to be firmly fixed. That is, when an external force 300 is applied to the side of the chassis 110, torque is generated about the edge of the chassis 110 so that the center of the upper surface of the chassis 110 is bent toward the backlight unit 140. do. At this time, by fixing the upper surface of the chassis 110 to the mold frame 150 by using a hook coupling next to the edge of the chassis 110, the torque can be prevented from being transmitted to the upper surface of the chassis 110.

Accordingly, since the upper surface of the chassis 110 may be prevented from being bent toward the backlight unit 140, the chassis 110 may not press the backlight unit 140 positioned below, thereby realizing uniformity of light.

In addition, it is possible to prevent the chassis 110 from being deformed by an external impact by only hooking without additional screw fastening.

Hereinafter, the liquid crystal display according to the second embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5.

For convenience of description, members having the same functions as the members shown in the drawings of the first embodiment are denoted by the same reference numerals, and therefore description thereof is omitted. 4 illustrates a mold frame 150 in which the liquid crystal display panel assembly 130 and the backlight unit 140 are accommodated, and a chassis 110 positioned on the mold frame 150 according to the second embodiment of the present invention. It is a perspective view which shows the liquid crystal display device 400 containing. 5 is a partial cross-sectional view taken along the line BB ′ after assembling the liquid crystal display 400 of FIG. 4.                     

As shown in FIG. 5, the lamp assembly 143 includes a lamp 153 that emits light, a lamp holder 152 that is inserted at both ends of the lamp 153 to support the lamp 153 and protect it from impact. In order to reflect the light emitted from the lamp 153 toward the light guide plate 142, the lamp cover 151 surrounding the outer circumferential surface of the lamp 153 is connected to electrodes (not shown) protruding from both ends of the lamp 153. It is composed of a wire (not shown) for supplying a current to the lamp 153.

4 and 5, the liquid crystal display device 400 of this embodiment has the same structure as the liquid crystal display device 400 of the first embodiment except for the following. That is, a user hole 420 for coupling an external device (not shown) and the liquid crystal display device 400 is formed at a side of the chassis 110 in the long side direction. The screw 260 is fastened to the user hole 420 to overlap the liquid crystal display device 400 with an external device (not shown).

When an external force is applied to the liquid crystal display device 400, for example, in the process of fastening the screw 260 to the user hole 420, the side surface of the chassis 110 is forced outward as shown in FIG. 5. You will receive 500. As the liquid crystal display device 400 becomes slim, the chassis 110 becomes thinner and the size of the chassis 110 becomes larger in accordance with the trend of the larger size of the liquid crystal display device 400. The upper surface of the 110 is bent toward the backlight unit 140.

To prevent this, as shown in FIGS. 4 and 5, the upper hook 450 coupled to the upper surface of the chassis 110 on the upper surface of the side wall 161 formed along the edge of the upper surface of the mold frame 150. ) Is formed to protrude. In addition, an upper hook coupling hole 430 is formed at a position corresponding to the upper hook 450 on the upper surface of the chassis 110 coupled with the mold frame 150.

Here, the height of the upper hook 450 is formed to be the same height as the upper surface of the chassis 110, or slightly lower than the upper surface of the chassis 110 in order to thin the liquid crystal display 400, the upper hook 450 is a chassis It is preferable not to protrude to the upper surface of the (110).

Preferably, a plurality of upper hooks 450 may be formed to be spaced apart from each other by a predetermined distance in the long side direction of the mold frame 150. Preferably, the upper hook 450 and the upper hook coupling hole 430 may be formed to correspond to the position where the user hole 420 receiving the external force 500 is concentrated. In the second embodiment of the present invention, since the user hole 420 is disposed in the long side direction of the chassis 110, the upper hook 450 and the upper hook coupling hole 430 corresponding to the upper mold 450 and the mold hook 150 are respectively formed. It is preferably formed in the long side direction of the chassis 110.

As such, when the upper hook 450 and the upper hook coupling hole 430 are fastened in the long side direction of the chassis 110 in which the user hole 420 is formed, the user hole 420 is illustrated in FIG. 5. When the screw 260 is fastened to the side, the side of the chassis 110 receives the force 500 outward, but the upper hook 450 and the upper hook coupling hole 430 are coupled to each other so that the upper surface of the chassis 110 is molded by the mold frame ( 150) to be firmly fixed. That is, when an external force 500 is applied to the side of the chassis 110, torque is generated about the edge of the chassis 110, and the center of the upper surface of the chassis 110 is bent toward the backlight unit 140. do. At this time, by fixing the upper surface of the chassis 110 to the mold frame 150 by using a hook coupling next to the edge of the chassis 110 is generated torque can be prevented from being transmitted to the upper surface of the chassis 110. .

Accordingly, since the upper surface of the chassis 110 may be prevented from being bent toward the backlight unit 140, the chassis 110 may not press the backlight unit 140 positioned below, thereby realizing uniformity of light.

In addition, it is possible to prevent the chassis 110 from being deformed by an external impact by only hooking without additional screw fastening.

Hereinafter, a liquid crystal display according to a third exemplary embodiment of the present invention will be described in detail with reference to FIG. 6.

For convenience of description, members having the same functions as the members shown in the drawings of the first embodiment are denoted by the same reference numerals, and therefore description thereof is omitted. FIG. 6 illustrates a mold frame 150 in which a liquid crystal display panel assembly 130 and a backlight unit 140 are accommodated, and a chassis 110 positioned above the mold frame 150 according to a third embodiment of the present invention. It is a perspective view which shows the liquid crystal display device 600 containing.

As shown in FIG. 6, the liquid crystal display device 600 of the present embodiment has a basically identical structure to the liquid crystal display device 600 of the first embodiment except for the following. That is, a user hole 620 for coupling the external device (not shown) and the liquid crystal display device 600 is formed at the side of the chassis 110 in the long and short sides. The screw 260 is fastened to the user hole 620 to overlap the liquid crystal display device 600 with an external device (not shown).

When an external force is applied to the liquid crystal display device 600, the chassis 110 may prevent the upper surface from bending toward the backlight unit 140, as shown in FIG. 6. An upper hook 650 coupled to the upper surface of the chassis 110 protrudes from the upper surface of the side wall 161 formed along the edge of the upper surface. In addition, an upper hook coupling hole 630 is formed at a position corresponding to the upper hook 650 on the upper surface of the chassis 110 coupled with the mold frame 150.

Here, the height of the upper hook 650 is formed to the same height as the upper surface of the chassis 110 or thinner than the upper surface of the chassis 110 in order to thin the liquid crystal display 600, the upper hook 650 is the chassis It is preferable not to protrude to the upper surface of the (110).

Preferably, the upper hook 650 may be formed in a plurality of spaced apart from each other by a predetermined interval in the long side and short side direction of the mold frame 150. Preferably, the upper hook 650 and the upper hook coupling hole 630 may be formed to correspond to the position where the user hole 620 receiving the external force is concentrated. In the second embodiment of the present invention, since the user hole 620 is disposed in the long and short sides of the chassis 110, the upper hook 650 and the upper hook coupling hole 630 corresponding thereto may also be molded in the mold frame 150. And the long side and short side of the chassis 110 are preferably formed.

As such, when fastening the upper hook 650 and the upper hook coupling hole 630 in the long and short sides of the chassis 110 in which the user hole 620 is formed, an external force is applied to the side of the chassis 110. Even if applied, it is possible to prevent the torque from being transmitted to the upper surface of the chassis 110.                     

Accordingly, since the upper surface of the chassis 110 may be prevented from being bent toward the backlight unit 140, the chassis 110 may not press the backlight unit 140 positioned below, thereby realizing uniformity of light.

In addition, it is possible to prevent the chassis 110 from being deformed by an external impact by only hooking without additional screw fastening.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

According to the liquid crystal display device according to the present invention as described above, by forming the upper hook on the upper surface of the side wall of the mold frame and the upper hook coupling hole corresponding to the upper hook to secure the upper surface of the chassis to the mold frame by the chassis It is possible to provide a liquid crystal display device which can prevent the bending.

In addition, by preventing the chassis unit from bending toward the backlight unit, the chassis does not press the backlight unit disposed below, thereby providing a liquid crystal display device capable of realizing uniformity of light.

Claims (4)

A liquid crystal display panel assembly having an integrated printed circuit board having a TFT panel displaying image information and a peripheral circuit for processing a gate driving signal and a data driving signal required for driving the TFT panel; A backlight unit having a lamp for providing a light source to the TFT panel; A rectangular mold frame having sidewalls formed along an edge of an upper surface thereof to accommodate the liquid crystal display panel assembly and the backlight unit in the sidewalls, and a top hook formed along an upper surface of the sidewalls; And And a chassis covering an upper surface of the liquid crystal display panel assembly to be coupled to the mold frame and having an upper hook coupling hole formed on an upper surface corresponding to the upper hook. According to claim 1, And the upper hook is formed along a sidewall formed along a short side and / or a long side of the mold frame. According to claim 1, The mold frame has side hooks formed along an outer side surface of the sidewall of the mold frame, the chassis has side hook coupling holes formed at sides corresponding to the side hooks, and the top hook has side walls having the side hooks formed thereon. Liquid crystal display, characterized in that formed along the upper surface of the. According to claim 1, The chassis has a user hole formed in the side for coupling with an external device, And the upper hook is formed along an upper surface of a side wall of the mold frame corresponding to a side surface of the chassis where the user hole is formed.

Images