KR20060083262A - Liquid crystal display device - Google Patents

Abstract

A liquid crystal display device is provided. A liquid crystal display device includes a liquid crystal panel assembly having a TFT panel for displaying image information, a liquid crystal panel assembly having a peripheral circuit for processing a gate driving signal and a data driving signal required for driving the TFT panel, and a backlight for providing a light source to the TFT panel. A middle fixing device disposed above the unit, a backlight unit, and having a plurality of protrusions formed to fix the liquid crystal panel assembly thereon, and surrounding the plurality of protrusions of the middle fixing device, formed along four sides of the liquid crystal panel assembly; And a mold frame.

Liquid crystal display, flexible circuit board, mold frame, middle fixing device

Description

Liquid crystal display device

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

2 is a plan view illustrating a middle fixing apparatus in which a liquid crystal panel assembly according to an exemplary embodiment of the present invention is mounted.

3 is a partial cross-sectional view taken along the line AA ′ of FIG. 2.

4 is a plan view illustrating a structure in which a mold frame is assembled to the middle fixing apparatus of FIG. 2.

FIG. 5 is a partial cross-sectional view taken along the line BB ′ of FIG. 4.

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

110: tower fixing device 130: liquid crystal panel assembly

131: gate tape carrier package

132: data tape carrier package 133: TFT panel

134: Curly filter substrate 135: Flexible circuit board

140: backlight unit 141: optical sheets

142: light guide plate 143: lamp assembly

144: reflector 150: bottom fixing device                 

160: middle fixing device 170: mold frame

The present invention relates to a liquid crystal display 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 which 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, the 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 electronic industry, and the telecommunication industry due to such unique advantages. As a matter of fact, the liquid crystal display device having such an advantage is 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 an active matrix display method using a switching element and a TN liquid crystal and a passive using STN liquid crystal due to a 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 have been widely used in recent years with the spread of mobile phones and PDAs.

Such a liquid crystal display device is composed of a liquid crystal panel assembly having a TFT panel for displaying image information, a backlight unit having a lamp for providing a light source to the TFT panel, and a fixing device for accommodating the liquid crystal panel assembly and the backlight unit. do.

In general, the backlight unit is housed in the bottom fixing device, and the liquid crystal panel assembly is fixed or mounted solely on the upper part of the bottom fixing device, and the top fixing device is fastened to the bottom fixing device.

On the other hand, the frequency of the inverter for driving the lamp of the backlight unit may interfere with the driving frequency of the liquid crystal panel assembly, it requires a shielding means for this, and at the same time requires a structure of a fixing device designed to have a stable assembly structure. .

An object of the present invention is to provide a liquid crystal display device that shields the lamp frequency from the backlight unit from providing electrical interference to the liquid crystal panel assembly and improves the assemblability between the liquid crystal panel assembly and the fixing device.

Technical problems to be achieved by 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 device comprising: a liquid crystal panel assembly including a TFT panel displaying image information, a peripheral circuit processing a gate driving signal and a data driving signal required for driving the TFT panel; A middle fixing device having a backlight unit having a lamp for providing a light source to the TFT panel, a middle fixing device disposed on the backlight unit, the middle fixing device having a plurality of protrusions formed to fix the liquid crystal panel assembly thereon, and the middle fixing device A plurality of protrusions surrounding the plurality of protrusions, wherein the mold frame is formed along four sides of the liquid crystal panel assembly.

The middle fixing device may be formed of a conductive material to shield the lamp frequency from the backlight unit from providing electrical interference to the liquid crystal panel assembly.

The liquid crystal panel assembly may further include a flexible circuit board on which a peripheral circuit for processing the gate driving signal and the data driving signal is mounted, wherein the flexible frame substrate is bent at least one frame side. It can be formed open to provide a passageway.

Specific details of other embodiments are included in the detailed description and 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 will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. 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.

First, a liquid crystal display according to an exemplary embodiment of the present invention will be described with reference to FIG. 1.

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

As shown in FIG. 1, the liquid crystal display device 100 according to the exemplary embodiment of the present invention generally has a liquid crystal panel assembly 130, a backlight unit 140, a middle fixing device 160, and a mold frame 170. And the tower fixing device 110 and the bottom fixing device 150.

Here, the liquid crystal panel assembly 130 may include a TFT panel 133, a liquid crystal panel including a color filter substrate 134, a liquid crystal (not shown), a driving IC 132, and a flexible circuit board (FPC) ( 135).

The liquid crystal panel has 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. ), And includes a color filter substrate 134 installed so as to oppose).

The driving IC 132 provides a gate driving signal and a data driving signal to each gate line and each data line (not shown) formed in the TFT panel 133.

Meanwhile, in the flexible circuit board 135, various driving components for processing the gate driving signal and the data driving signal may be mounted, and a plurality of wiring patterns electrically connecting an external circuit and the driving IC 132 may be provided. Formed.

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 serves to guide the light supplied to the liquid crystal 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.

And, the bottom fixing device 150 serves to receive and fix the components constituting the backlight unit 140.

The middle fixing device 160 is disposed above the backlight unit 140, and a window 161 is formed to transmit light provided from the backlight unit 140 to the liquid crystal panel assembly 130. In addition, a plurality of protrusions 162 are formed on the middle fixing device 160 to fix the liquid crystal panel assembly 130.

At this time, the mold frame 170 of an insulating material formed to surround the plurality of protrusions 162 is assembled on the middle fixing device 160.

The middle fixing device 160 may be formed of a conductive material to shield the lamp frequency from the backlight unit 140 from providing electrical interference to the liquid crystal panel assembly 130. The middle fixing device 160 may be formed of a sus material.

In addition, a top fixing device 110 may be formed on the liquid crystal panel assembly 130, and the bottom fixing device 150, the middle fixing device 160, and the top fixing device 110 are together. The fastening is performed to assemble the liquid crystal display.

In this case, the bottom fixing device 150, the middle fixing device 160, and the top fixing device 110 may be formed of a conductive material such as sus, and thus, the backlight unit 140 and the liquid crystal panel assembly 130. ) May provide a ground path of an electrical signal applied to the circuit.

Next, the structure of the middle fixing device of the liquid crystal display device according to the exemplary embodiment of the present invention will be described in more detail with reference to FIGS. 2 and 3.

2 is a plan view illustrating a middle fixing device 160 in which the liquid crystal panel assembly 130 is mounted, and FIG. 3 is a partial cross-sectional view taken along the line AA ′ of FIG. 2.

As shown in FIGS. 2 and 3, the middle fixing device 160 of the liquid crystal display according to the exemplary embodiment of the present invention may include a window 161 so that the liquid crystal panel assembly 130 is exposed to the backlight unit 140. It is formed in the form of a frame.

In this case, four corners of the middle fixing device 160 are provided with protrusions 162 formed to be spaced apart from the window 161 by a predetermined portion.

The protrusion 162 serves to fix the liquid crystal panel assembly 130 to be seated on the middle fixing device 160.

In this case, the thickness of the protrusion 162 may be formed at the same height as the thickness of the liquid crystal panel assembly 130 protruding from the surface of the middle fixing device 160, and may be formed at a lower or higher thickness.

Next, the structure of the mold frame 170 assembled with the middle fixing device of the liquid crystal display according to the exemplary embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5.

4 is a plan view illustrating a structure in which the mold frame 170 is assembled to the middle fixing device 160 of FIG. 2, and FIG. 5 is a partial cross-sectional view taken along the line BB ′ of FIG. 4.

As shown in FIG. 4 and FIG. 5, the mold frame 170 assembled to the middle fixing device 160 of the liquid crystal display according to the exemplary embodiment of the present invention is a liquid crystal seated on the middle fixing device 160. It is formed along the upper, lower, left, and right sides of the panel assembly 170, and is molded and formed to surround the protrusions 162 formed at the four corners of the middle fixing device 160.

In addition, in the case of the liquid crystal panel assembly 130 mainly used for a small liquid crystal display device, a flexible circuit board (see 135 in FIG. 1) formed to extend to the outside is mounted.

In this case, it is preferable that one side of the mold frame 170 has an opening 171 which is opened to provide a passageway through which the flexible circuit board 135 mounted on the liquid crystal panel assembly 130 is bent. .

Specifically, the backlight unit 140 and the liquid crystal panel assembly 130 are accommodated according to the fastening of the bottom fixing device 150 and the middle fixing device 160, and then the flexible circuit board mounted on the liquid crystal panel assembly 130. The 135 is bent to cover the bottom surface of the bottom fixing device 150. Accordingly, one side surface of the mold frame 170 is opened so as not to interfere with bending of the flexible circuit board 135.

As such, the adoption of the mold frame 170 assembled to the middle fixing device 160 serves to more stably fix the liquid crystal panel assembly 130.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments and can be variously modified and implemented by those skilled in the art without departing from the technical scope of the present invention.

 According to the present invention as described above, it is possible to shield the lamp frequency from the backlight unit from providing electrical interference to the liquid crystal panel assembly, and at the same time improve the assemblability between the liquid crystal panel assembly and the fixing device.

Claims (7)

 A liquid crystal panel assembly 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 middle fixing device disposed on the backlight unit and having a plurality of protrusions formed to fix the liquid crystal panel assembly thereon; And And a mold frame surrounding the plurality of protrusions of the middle fixing device and formed along four sides of the liquid crystal panel assembly. In claim 1, And the middle fixing device is formed of a conductive material to shield the lamp frequency from the backlight unit from providing electrical interference to the liquid crystal panel assembly. In claim 2, The middle fixing device is formed of a sus material. In claim 1, The liquid crystal panel assembly further includes a flexible circuit board on which a peripheral circuit for processing the gate driving signal and the data driving signal is mounted. And the mold frame is open so that at least one frame side is provided to provide a passageway through which the flexible circuit board is bent. In claim 1, The mold frame is formed of an insulating material. In claim 1, And a bottom fixing device coupled to the middle fixing device. In claim 6, And a top fixing device coupled to the middle fixing device and / or the bottom fixing device.

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