KR20060067654A - Liquid crystal display minimizing damage of components - Google Patents

Abstract

A liquid crystal display device capable of preventing damage due to collision between components is provided. Such a liquid crystal display device includes a liquid crystal display panel assembly having a TFT panel for 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 a light source on the TFT panel. A backlight unit having a lamp, a side wall formed along an edge of an upper surface thereof, and a mold frame accommodating the liquid crystal display panel assembly and the backlight unit in the side wall, and covering the upper surface of the liquid crystal display panel assembly to be coupled with the mold frame. And a chassis that is screwed into the mold frame.

LCD, chassis, mold frame, screw, set frame

Description

Liquid crystal display minimizing damage of components

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

FIG. 2 is an exploded perspective view illustrating a relationship between a liquid crystal display panel assembly and a mold frame, a chassis, and a set frame in which a backlight unit is accommodated in the liquid crystal display device of FIG. 1.

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

4 is an exploded perspective view showing a display device accommodating a liquid crystal display device according to a first embodiment of the present invention.

5 is an exploded perspective view of a liquid crystal display device illustrating a relationship between a liquid crystal display panel assembly and a mold frame, a chassis, and a set frame in which a backlight unit is accommodated, according to a second exemplary embodiment of the present invention.

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

FIG. 7 is an exploded perspective view of a liquid crystal display device illustrating a relationship between a liquid crystal display panel assembly and a mold frame, a chassis, and a set frame in which a backlight unit is accommodated, according to a third exemplary embodiment of the present invention.

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

100, 500, 700: LCD 110: Chassis

111, 411: Second female thread 115: Window

120, 420: Set frame 121, 421: Third female thread

122 and 422: coupling hole 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 151, 451: first female thread

152: lamp holder 153: lamp

154: lamp cover 210, 401: external thread

400: display device 410: lower case

420: upper case 430: main body

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of preventing damage to components by integrally combining a mold frame, a chassis, and a set frame surrounding the liquid crystal display panel when the modules are interlocked. .

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 active matrix display is used for TFT-LCD, which uses TFT as a switch to drive LCD, and passive matrix display does not use transistors. I don't need it. 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. In order to assemble such a liquid crystal display device into a case of a display device such as a notebook computer, a set frame coupled to an outer surface of the chassis is fixedly coupled to the case.

In the display device including the liquid crystal display device, the display device is generally shaken during the process of transporting, moving, and assembling. In general, when shaking occurs in the display device, the mold frame, the backlight unit, and the liquid crystal display panel assembly, which are assembled inside the display device, are not closely connected to each other, so that the parts collide with each other to cause damage to the parts. There is a case.

In general, the ground of the printed circuit board constituting the liquid crystal display device is connected to the chassis, and the chassis is connected to the entire display device through the set frame. If the ground connection is broken because the components in the display device are not tightly coupled to each other, electromagnetic interference (EMI) generated by the printed circuit board may be a problem.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a liquid crystal display device capable of tightly coupling each component constituting the liquid crystal display device to prevent a collision between the components.

Technical problems of the present invention are not limited to the technical problems mentioned above, 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. The mold frame and the chassis covering the upper surface of the liquid crystal display panel assembly and coupled to the mold frame and screwed to the mold frame.

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, and only the embodiments are to make the disclosure of the present invention complete, and the general knowledge in the technical field to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

1 is an exploded perspective view illustrating a liquid crystal display according to a first embodiment of the present invention. 2 is an exploded perspective view illustrating a relationship between a liquid crystal display panel assembly and a mold frame, a chassis, and a set frame in which a backlight unit is accommodated in the liquid crystal display device of FIG. 1.

1 and 2, 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 array, a pixel electrode, and the like, a color filter, a black matrix, a common electrode, and the like. And a color filter substrate 134 provided to face the TFT panel 133.                     

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 light guide plate 142 is formed of a panel of a plastic-based transparent material such as acryl to propagate light generated from the lamp toward the liquid crystal display panel seated on the light guide plate. Accordingly, various patterns for converting the traveling direction of light incident into the light guide plate 142 toward the liquid crystal display panel are formed on the rear surface of the light guide plate 142. The lamp assembly 143 includes a lamp inserted into the side of the light guide plate 142 to emit such light and a lamp reflector surrounding the lamp. 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 142 to the top. The reflecting plate 144 is disposed on the lower surface of the light guide plate 142, and reflects the light not reflected by the minute dot pattern on the rear surface of the light guide plate 142 toward the exit surface of the light guide plate 142, thereby being incident on the liquid crystal display panel. At the same time, it serves to reduce the light loss of the light and to improve the uniformity of the light transmitted to the exit surface of the light guide plate 142.

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. The optical sheets 141 include a diffusion sheet, a prism sheet, a protective sheet, and the like. A diffusion sheet located between the light guide plate 142 and the prism sheet disperses the light incident from the light guide plate 142 to prevent the light from being partially concentrated. The prism sheet has a triangular prism with a predetermined arrangement on the upper surface, and is usually composed of two sheets, and each prism arrangement is arranged so as to cross each other at a predetermined angle so that the light diffused from the diffusion sheet is displayed on the liquid crystal display. Condenses in a direction perpendicular to the panel. As a result, the light passing through the prism sheet almost runs vertically so that the luminance distribution on the protective sheet is uniformly obtained. The protective sheet formed on the prism sheet not only serves to protect the surface of the prism sheet, but also serves to diffuse light in order to make the distribution of light uniform.

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.

The liquid crystal display panel assembly 130 is installed on the protective sheet and is mounted in the mold frame 150 together with the backlight unit 140. The mold frame 150 has a rectangular shape and has sidewalls formed along the edges of the top surface to accommodate and fix the backlight unit 140 and the liquid crystal display panel assembly 130 in the sidewalls, and include a plurality of sheets. The backlight unit 140 is prevented from bending. The integrated printed circuit board 135 of the liquid crystal display panel assembly 130 is bent on the sidewall of the mold frame 150 to be seated on the rear surface of the mold frame 150. Here, the shape of the mold frame 150 may be variously modified according to a method of accommodating the backlight unit 140 or the liquid crystal display panel assembly 130 in the mold frame 150.

The chassis 110 covers the top surface of the liquid crystal display panel assembly 130 and is coupled to the mold frame 150. The short side of the chassis 110 is combined with the set frame 120 to fix the assembled liquid crystal display device 100 to the display device. The set frame 120 is formed with a plurality of coupling holes 122 to be fixed to the display device.

Hereinafter, the coupling relationship between the components constituting the liquid crystal display device 100 according to the first embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3. 3 is a partial cross-sectional view taken along line AA ′ after assembling the liquid crystal display 100 of FIG. 2.

2 and 3, the mold frame 150 according to the first embodiment of the present invention has a rectangular shape, and sidewalls 155 are formed along the edge of the upper surface thereof to form a liquid crystal display in the sidewalls 155. The panel assembly 130 and the backlight unit 140 are received. 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 is formed with a window 115 for exposing the liquid crystal display panel assembly 130 to the outside.

The chassis 110 may be coupled to the mold frame 150 through a hook (not shown), for example, a hook is formed along an outer surface of the side wall 155 of the mold frame 150 and corresponds to the hook. Hook insertion hole (not shown) may be formed on the side of the chassis (110). Therefore, as the chassis 110 descends from the top of the mold frame 150, the hook formed in the mold frame 150 enters the hook insertion hole of the chassis 110 so that the mold frame 150 and the chassis 110 are fastened. do.

2 and 3, in order to assemble the liquid crystal display device 100 according to the first embodiment of the present invention to a display device (not shown), the set frame 120 is coupled in a short side direction of the chassis 110. The liquid crystal display device 100 is accommodated in the display device by combining the set frame 120 and the display device.

When the liquid crystal display device 100 is inserted into and accommodated in the display device, it is necessary to fasten the respective parts closely to each other to prevent a collision between the respective parts constituting the liquid crystal display device 100. To this end, as shown in FIGS. 2 and 3, the first female screw 151 is formed on the short sidewall of the mold frame 150, and the first female screw is provided on the chassis 110 covering the upper surface of the mold frame 150. A second female thread 111 corresponding to 151 is formed, and the set frame 120 coupled to the side of the chassis 110 is located at a position corresponding to the first female thread 151 and the second female thread 111. The third female screw 121 is formed.

Referring to FIG. 3, the liquid crystal display panel assembly 130 and the backlight unit 140 constituting the liquid crystal display device 100 are accommodated in the mold frame 150 by double-sided data or various fastening members. The collision between them can be prevented. In addition, since the mold frame 150 is integrally coupled to the chassis 110 and the set frame 120 through the same male screw 210, even if there is an external impact or movement, the parts are tightly coupled to each other. The collision between the parts can be prevented.

In addition, the integrated printed circuit board 135 is connected to the chassis 110 and the ground to prevent the EMI, the chassis 110 is connected to the entire display device through the set frame 120, the first embodiment of the present invention Since the mold frame 150, the chassis 110, and the set frame 120 are integrally coupled to each other like the liquid crystal display 100 according to an example, it is possible to prevent the ground connection from being damaged. It can prevent falling.

In the case of the mold frame 150 according to the first embodiment of the present invention, the second female thread 111 is buried from the outside of the short side wall 155 of the mold frame 150, but the present invention is limited thereto. The second female screw 111 may penetrate the side wall 155 of the mold frame 150. That is, the first female screw, the second female screw 111 and the third female screw 121 may be formed at positions corresponding to each other and have a shape capable of integrally coupling.

4 is an exploded perspective view illustrating a display apparatus 400 accommodating a liquid crystal display apparatus 100 according to a first exemplary embodiment of the present invention. As shown in FIG. 4, the display apparatus 400 includes an upper case 420, a lower case 410, and a main body 430 connected thereto for accommodating the liquid crystal display 100.                     

A set frame 120 is coupled by a male screw 210 along a short side of the chassis 110 constituting the liquid crystal display device 100, and a coupling hole 122 formed in a predetermined portion of the set frame 120 corresponds to the set hole 120. The boss 411 formed on the lower case 410 is screwed to assemble the liquid crystal display device 100 to the display device 400.

The main body 430 and the lower case 410 are physically coupled by a hinge, and the main body 430 and the liquid crystal display 100 are electrically coupled. Accordingly, the liquid crystal display 100 may display an image desired by the user on the liquid crystal display panel based on the information and the driving signal stored in the main body 430.

4 has been described using a notebook as the display device 400 for convenience of description, the present invention is not limited thereto. In other words, the display device used in the present invention may be a laptop, a portable multimedia player (PMP), a personal digital assistant (PDA), a digital versatile disk (DVD) player, a cellular phone, or the like using the liquid crystal display device. Can be.

Hereinafter, the liquid crystal display according to the second embodiment of the present invention will be described in detail with reference to FIGS. 5 and 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. 5 is an exploded perspective view of a liquid crystal display device 500 showing a relationship between a liquid crystal display panel assembly and a mold frame, a chassis, and a set frame in which a backlight unit is accommodated, according to a second embodiment of the present invention. 6 is a partial cross-sectional view taken along the line BB ′ after assembling the liquid crystal display 500 of FIG. 5.                     

The lamp assembly 143 shown in FIG. 6 includes a lamp 153 for emitting light, a lamp holder 152 inserted into both ends of the lamp 153 to support the lamp 153 and to protect it from impact, and a lamp ( In order to reflect the light emitted from the 153 toward the light guide plate 142, a lamp cover 154 surrounding the outer circumferential surface of the lamp 153 and an electrode (not shown) protruding from both ends of the lamp 153 are connected to the lamp 153. It is composed of a wire (not shown) for supplying a current to the.

5 and 6, the liquid crystal display device 500 of the second embodiment of the present invention has the same structure as the liquid crystal display device 100 of the first embodiment except for the following. That is, when the liquid crystal display device 500 is inserted into and accommodated in the display device, the parts need to be tightly coupled to each other in order to prevent a collision between the parts constituting the liquid crystal display device 500. 5 and 6, a first female screw 451 is formed on a long sidewall of the mold frame 150, and the chassis 110 covers an upper surface of the mold frame 150. The second female screw 411 corresponding to the first female screw 451 is formed therein, and the first female screw 451 and the second female screw 411 are provided on the set frame 420 that is coupled to the side of the chassis 110. The third female screw 421 is formed at the corresponding position. That is, the set frame 420 is coupled to the side portion in the long side direction of the chassis 110, and the first female screw 451 corresponding to the third female screw 421 formed on the set frame 420 is molded. It is formed on the side in the long side direction of the frame 150.

Referring to FIG. 6, since the mold frame 150, the chassis 110, and the set frame 420 are integrally coupled through the same male screw 210, even if there is an external impact or movement, the components are tightly coupled to each other. As a result, collisions between components can be prevented. Since the set frame 420 of the present embodiment is positioned in the long side direction of the chassis 110, the area in contact with the chassis 110 is further increased, and thus the liquid crystal display 500 is displayed through the coupling hole 422. The tighter and tighter fastening can be configured when the device is fastened to the device.

In addition, the integrated printed circuit board 135 is connected to the chassis 110 and the ground to prevent EMI, the chassis 110 is connected to the entire display device through the set frame 420, the second embodiment of the present invention Since the mold frame 150, the chassis 110, and the set frame 420 are integrally combined with each other, such as the liquid crystal display 500 according to the exemplary embodiment, it is possible to prevent the ground connection from being damaged. It can prevent falling.

In the case of the mold frame 150 according to the second embodiment of the present invention, the second female screw 411 is formed is buried from the outside of the long side wall 155 of the mold frame 150, the present invention is limited thereto. The second female screw 411 may be formed through the side wall 155 of the mold frame 150. That is, the first female screw, the second female screw 411 and the third female screw 421 may be formed at positions corresponding to each other and have a shape that can be integrally coupled.

Hereinafter, a liquid crystal display according to a third exemplary embodiment of the present invention will be described in detail with reference to FIG. 7.

For convenience of description, members having the same functions as the members shown in the drawings of the first and second embodiments are denoted by the same reference numerals, and thus description thereof is omitted. FIG. 7 is an exploded perspective view of a liquid crystal display device 700 showing a relationship between a liquid crystal display panel assembly and a mold frame, a chassis, and a set frame in which a backlight unit is accommodated, according to a third exemplary embodiment of the present invention.

As shown in FIG. 7, the liquid crystal display device 700 of the third embodiment of the present invention is basically the liquid crystal display device 100 of the first embodiment and the liquid crystal display device 500 of the second embodiment except for the following. Have the same structure. That is, when the liquid crystal display device 700 is inserted into and accommodated in the display device, the parts need to be tightly coupled to each other in order to prevent a collision between the parts constituting the liquid crystal display device 700. To this end, as shown in FIG. 7, first female screws 151 and 451 are formed on the short side and long side sidewalls of the mold frame 150, and a first portion is provided on the chassis 110 covering the upper surface of the mold frame 150. The second female threads 111 and 411 corresponding to the female threads 151 and 451 are formed, and the first female screws 151 and 451 and the second female screws are provided on the set frames 120 and 420 engaged with the sides of the chassis 110. The third female screws 121 and 421 are formed at positions corresponding to the female screws 111 and 411. That is, the set frames 120 and 420 are coupled to the side portions in the short and long side directions of the chassis 110 and correspond to the first female screws 121 and 421 formed on the set frames 120 and 420. 151 and 451 are formed at the side part in the cross section and the long side direction of the mold frame 150.

Referring to FIG. 7, since the mold frame 150, the chassis 110, and the set frames 120 and 420 are integrally coupled through the same male thread 210, the components are closely connected to each other even if there is an external impact or movement. It is fastened so that collision between the parts can be prevented. Since the set frames 120 and 420 of the present exemplary embodiment are positioned at the short and long sides of the chassis 110, the area of the set frame 120 and 420 in contact with the chassis 110 is further increased, and thus the liquid crystal display 700 is connected to the display device. When storing and tightening, it is possible to construct a tighter and tighter tightening.

In addition, the integrated printed circuit board 135 is connected to the chassis 110 and the ground to prevent the EMI, the chassis 110 is connected to the entire display device through the set frame (120, 420), Like the liquid crystal display 700 according to the second embodiment, since the mold frame 150, the chassis 110, and the set frames 120 and 420 are integrally coupled, such ground connection may be prevented from being damaged. This can prevent the video quality from falling.

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 integrally combining the mold frame, the chassis and the set frame, it is possible to prevent the collision between the components constituting the liquid crystal display device, and furthermore, the ground connection is damaged. It is possible to provide a liquid crystal display device which can prevent the image quality from being lowered due to EMI, since it can be prevented.

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 mold frame having sidewalls formed along edges of an upper surface thereof to accommodate the liquid crystal display panel assembly and the backlight unit in the sidewalls; And And a chassis which covers an upper surface of the liquid crystal display panel assembly and is coupled to the mold frame and fastened by screwing to the mold frame. According to claim 1, The mold frame is formed with a first female thread on the outer surface of the side wall, And the second female screw is formed at a position corresponding to the first female screw on a sidewall of the chassis, and is fastened to the mold frame by the same male screw. The method of claim 2, And the first female thread is formed along sidewalls formed along the short side and / or long side of the mold frame. The method of claim 2, Further comprising a rectangular set frame coupled to the side of the chassis and having a third female thread formed at a position corresponding to the first female thread and the second female thread on a side wall thereof to be simultaneously engaged with the mold frame and the chassis by the same male screw. Liquid crystal display device.

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