KR20070000829A - Top chassis and liquid crystal display having the same - Google Patents

Abstract

A top chassis and an LCD having the same are provided to shorten the time for attaching and detaching the top chassis to and from an LCD panel, thereby significantly improving the productivity, by installing an attaching and detaching unit on an upper surface of the top chassis. A top chassis(160) includes an attaching and detaching unit. The top chassis is configured to prevent the movement of a display panel(110) and protect the display panel from an external impact. The attaching and detaching unit is formed on an upper surface of the top chassis to facilitate the attachment and detachment of the top chassis. The attaching and detaching unit is positioned at a corner of the upper surface of the top chassis.

Description

TOP CHASSIS AND LIQUID CRYSTAL DISPLAY HAVING THE SAME}

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

FIG. 2 is a cross-sectional view taken along line II ′ of FIG. 1.

3A and 3B illustrate top chassis according to an embodiment of the present invention.

<Description of main parts of drawing>

110: liquid crystal display panel 112: color filter substrate

114: thin film transistor substrate 120: driving circuit portion

121: gate tape carrier package 122: gate driver

124: gate printed circuit board

125: data tape carrier package 126: data driver

128: data printed circuit board

130: backlight assembly 131: lamp

132: lamp cover 133: reflector

134: light guide plate 134: diffusion sheet

136: prism sheet 137: protective sheet

140: bottom sash 142: fastening hook

144: screw through hole 150: mold frame

152: combining means 160: top sash

162: upper surface

164a, 164b, 164c, 164d: Up / Down / Left / Right Sides

166: detachable means 168: fastening means

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a top chassis and a liquid crystal display device having the same, and more particularly, to a top chassis and a liquid crystal display device having the same, which can improve productivity and reduce costs due to fastening and detachment, as well as product reliability.

In general, as the modern society becomes information socialized, the importance of the liquid crystal display, which is one of the information display devices, is gradually increasing. Cathode ray tube (CRT), which is widely used so far, has many advantages in terms of performance and price, but has many disadvantages in terms of miniaturization or portability. On the other hand, the liquid crystal display device is more expensive in terms of price, but has been attracting attention as an alternative means of overcoming the disadvantages of the CRT due to advantages such as miniaturization, light weight, thinness, and low power consumption.

 In recent years, in order to satisfy the purpose of light and short reduction of the liquid crystal display device, continuous researches have been conducted on the respective members constituting the liquid crystal display device, such as a backlight, a connector, a printed circuit board (PCB), or a coupling structure. It is a trend.

As described above, the liquid crystal display includes a liquid crystal display panel for largely displaying an image signal, a driving circuit unit for driving the liquid crystal display panel, and a backlight assembly for providing light to the liquid crystal display panel.

The liquid crystal display panel is composed of liquid crystal cells arranged in a matrix form between two substrates and switch elements for switching the signals supplied to the liquid crystal cells, respectively. The driving circuit unit includes a gate driver for driving the gate line of the liquid crystal display panel, a data driver for driving the data line of the liquid crystal display panel, a timing controller for controlling the gate driver and the data driver, a liquid crystal display panel and the driving circuit. It is composed of a power supply unit for supplying power signals required for driving of the. The backlight assembly is composed of a lamp for generating light, a light guide plate for guiding the light generated from the lamp toward the liquid crystal display panel, a reflector for increasing the efficiency of light, and various sheets. As such, since the liquid crystal display panel and the backlight assembly include a glass substrate and a lamp, the liquid crystal display panel and the backlight assembly may be easily damaged by an external impact. Thus, a case that surrounds and protects the exterior of the liquid crystal display panel and the backlight assembly is used to prevent the liquid crystal display panel and the backlight assembly. Therefore, the design of the case considering the reliability of the product and the high-density mounting has become a more important element technology.

In general, the case includes a mold frame and a bottom chassis for accommodating the liquid crystal display panel and the backlight assembly in addition to the front / rear case, and an integrated top chassis surrounding the edge except for the display screen portion of the liquid crystal display panel. The case for protecting the product includes a plurality of fastening holes, fastening grooves, fastening hooks, screwing holes, screw through holes, etc. on the front / rear side and the left / right side and are mutually coupled.

The finished product combined with each component is subjected to final test from high temperature, high humidity and external environment, where appearance defects such as poor polarization plate and poor backlight assembly and appearance defects related to assembly of equipment such as case lifting or bending There is a case. In this case, rework is performed. To this end, the top chassis must be separated, but in the process of separating the top chassis, the top chassis is integrated with the mold frame or the bottom chassis. Should be removed. At this time, the other side or one side of the integrated top chassis may be bent or lifted by the pressure applied to one side, and the driving circuit may be damaged by excessive force or the top chassis, resulting in line defects. In addition, workers are often injured. Therefore, the fastening and separating process by hand is complicated and the fastening and separating time becomes very long. In addition, the cost of the material due to the fastening and detachment failure of the top sash is high and the line defects are generated, thereby reducing the reliability of the product.

The present invention provides a top chassis and a liquid crystal having the same by adding a detachable means to an upper surface of the top chassis, thereby improving productivity by shortening the fastening and detaching time, and reducing the cost and reliability of the product by reducing the fastening and detaching failure. It is an object to provide a display device.

In order to achieve the above technical problem, the present invention provides a top sash for preventing flow of the display panel and protecting the display panel from external shocks, the detachable means being provided on an upper surface of the top sash so that the top sash can be easily detached. It provides a top sash characterized in that.

Here, the detachable means is characterized in that formed on the corner of the upper surface of the top chassis.

The detachable means may be formed between a top surface of a top chassis corresponding to a source drive IC and a gate drive IC for driving the display panel, respectively.

On the other hand, the detachable means is characterized in that the opening is formed in a diagonal direction from one side to the other side of the upper surface.

According to an aspect of the present invention, there is provided a liquid crystal display panel for displaying a screen, and a driving circuit unit for driving the liquid crystal display panel. An optical assembly for providing light to the liquid crystal display panel, a mold frame for seating the liquid crystal display panel, and a top sash protecting the liquid crystal display panel and preventing flow, wherein the top sash is easily removed. Provided is a liquid crystal display device comprising a detachable means on an upper surface of the top chassis.

Here, the detachable means is characterized in that it is formed to facilitate the detachment of the top chassis from the mold frame.

The detachable means is characterized in that formed on the corner of the top surface of the top chassis.

The detachable means may be formed between a top surface of a top chassis corresponding to a source drive IC and a gate drive IC for driving the liquid crystal display panel, respectively.

On the other hand, the detachable means is characterized in that the opening is formed in a diagonal direction from one side to the other side of the upper surface.

Other objects and advantages of the present invention in addition to the above objects will become apparent from the detailed description of the following embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

 1 is an exploded perspective view illustrating an assembling structure of a liquid crystal display device according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a liquid crystal display device taken along the line II of FIG. 1.

1 and 2, the liquid crystal display device 100 includes a front / rear case (not shown), a liquid crystal display panel 110 for displaying an image by applying an image signal, and a liquid crystal display panel 110. The driving circuit unit 120 for driving the backlight, the backlight assembly 130 providing light to the liquid crystal display panel 110, the mold frame 150 and the bottom housing the liquid crystal display panel 110 and the backlight assembly 130. It is composed of a sash 140 and a top sash 160.

The liquid crystal display panel 110 includes a thin film transistor substrate 114 and a color filter substrate 112 facing the thin film transistor substrate 114. A liquid crystal (not shown) is injected between the thin film transistor substrate 114 and the color filter substrate 112 and the light transmittance of the liquid crystal is controlled by using a thin film transistor (TFT) formed in a matrix form as a switching element. Will be displayed.

A gate line (not shown) is connected to a gate electrode (not shown) of the thin film transistor, a data line (not shown) is connected to a source electrode (not shown), and a pixel electrode (not shown) is connected to a drain electrode (not shown). Is formed. The color filter substrate 112 is formed with color pixels for displaying an image. Therefore, the light transmitted through the liquid crystal is expressed in a predetermined color through the pixel to implement the image.

The driving circuit unit 120 includes a gate drive integrated circuit 122 for driving gate lines (not shown) of the liquid crystal display panel 110, and a liquid crystal display panel 110. And a data drive IC 126 for driving data lines (not shown), a timing controller, a power supply (not shown), and various circuit elements, and generate various signals necessary to implement an image. The timing control unit, the power supply unit, and various circuit elements are attached to the printed circuit boards 124 and 128.

Various signal circuits on the gate printed circuit board 124 and the data printed circuit board 128 are electrically connected to the data lines and the gate lines through the gate tape carrier package 121 and the data tape carrier package 125, and the printed circuit A power supply unit and a timing controller (not shown) mounted on the substrates 124 and 128 receive an electrical signal from the outside. Here, the timing controller and the power supply unit generate gate control signals and power signals using various electrical signals from the outside. The power supply unit and the timing controller on the data and gate printed circuit boards 124 and 128 may include a gate drive IC mounted on the gate tape carrier package 121 to drive signals and timing signals for controlling the driving and driving timing of the liquid crystal display panel 110. And a gate line and a data line through a data drive IC mounted on the data tape carrier package 125.

The backlight assembly 130 is formed by the lamp unit 136, the reflective sheet 132 that prevents external emission of light generated from the lamp unit 136, the light guide plate 134 for guiding light, and the light guide plate 134. It consists of sheets such as a diffusion sheet 137 for diffusing the guided light, a prism sheet 138 for condensing the diffused light, and a protective sheet 139 for protecting the surface of the prism sheet 138. Provide light at 110.

The reflective sheet 132 serves to reflect the light emitted from the lamp unit 136 to the light guide plate 134 and the light emitted downward. The light guide plate 134 is for uniformly transmitting the light from the lamp to the screen display area, and is typically a transparent acrylic material having a thickness of about several millimeters, and has a plurality of dots or V on the bottom surface for uniform reflection of light. A magnetic groove (not shown) is formed.

The light guide plate 134 is formed to have a size corresponding to that of the liquid crystal display panel 110. Two or three sheets of the diffusion sheet 137 and the prism sheet 138 are appropriately combined to diffuse or condense the light from the light guide plate 134 to improve brightness or improve a viewing angle.

The protective sheet 139 is installed on the diffusion sheet 137 or the prism sheet 138 to protect the sheets sensitive to dust or scratches and to prevent the flow of the sheets when only the backlight assembly 130 is transported. do.

The bottom chassis 140 has a rectangular frame shape and has a space formed in the shape of a plate for accommodating and supporting the backlight assembly 130 therein. The side chassis 140 has a plurality of fastening hooks 142 having the same distance from the center. And various fastening means such as screw through holes 144.

The mold frame 150 may top / bottom / join a plurality of coupling means 152 for coupling with the bottom chassis 140 housing the backlight assembly 130 and the top chassis 160 protecting the liquid crystal display panel 110. It is provided in the left / right side. The mold frame 150 may be made of synthetic resin or plastic to insulate the driving circuit unit 120.

As such, the bottom chassis 140 and the mold frame 150 accommodate the liquid crystal display panel 110 and the backlight assembly 130 to prevent flow, and are applied to the liquid crystal display panel 110 and the backlight assembly 130. The function of absorbing the impact of, the top sash 160 to be described below also serves the same function.

The top sash 160 is a rectangular band bent at right angles and has a structure in which an effective display area of the liquid crystal display panel 110 is opened, as shown in FIGS. 3A and 3B. One end of 162 extends and consists of front and rear sides 164a and 164b which are bent downward, and left and right sides 164c and 164d.

As such, the top sash 160 includes a detachable means 166 on the upper surface 162, and forms an opening 169 in which each side surface 164a, 164b, 164c, and 164d is separated, thereby forming the top sash 160. To facilitate the fastening and dismounting.

The upper surface 162 of the top chassis 160 covers the upper edge of the liquid crystal display panel 110, and the front and rear sides 164a and 164b and the left and right sides 164c and 164d face the mold frame 150. ) And a plurality of fastening means 168 are formed to cover and cover the side of the bottom chassis 140. At this time, the detachable means 166 formed on the upper surface 162 of the top sash 160 is the upper surface 162 of the top sash 160 to withstand the pressure applied from each of the upper and lower surfaces of the top sash 160. Is formed at the corners of the. The detachable means 166 formed on the upper surface 162 may prevent the top sash 160 from being bent or lifted by dispersing that the pressure applied to only one side is transmitted to the other side when the top sash 160 is fastened and separated. have. The detachable means 166 is formed by opening in a diagonal direction from one side to the other side of the top surface 162 of the top chassis 160, and having a source driver IC and a gate driver IC (not shown) connected to the side of the liquid crystal display panel. It is preferably formed between the upper surface 162 of the corresponding top sash 160. As such, when the detachable means 166 is formed on the upper surface 162 of the top chassis 160 corresponding to the source driver IC and the gate driver IC, an excessive force of the operator may be caused when the top chassis 160 is fastened or detached. It prevents the direct transfer to the side to prevent the bending of the top sash 160. In addition, the force of the operator applied during fastening or detaching prevents the top chassis 160 from damaging the gate or the data drive-IC, resulting in line defects. In addition, instead of the conventional method of applying a force to the grooves one by one when the top chassis 160 is removed, the top side chassis 160 corresponding to the drive IC is applied to the grooves to remove the grooves and then insert the grooves by hand. In order to remove the top in order to remove the top chassis 160 in the order of removal of the groove with less force.

Meanwhile, the top sash according to the present invention can be applied not only to a liquid crystal display device but also to a display device such as a plasma display panel, a field emission device, an electroluminescent device, and the like.

As described above, in the top chassis according to the present invention and the liquid crystal display having the same, a detachment means is provided on the top surface of the top chassis so that the top chassis is fastened and separated in the top chassis fastening and separation process of the liquid crystal display. As a result, the productivity can be significantly improved.

In addition, the case of injuries to the operator during the fastening and detachment of the top chassis is reduced, and the fastening and separating process is facilitated, so that the cost reduction effect of reducing the defect of the top chassis during the fastening and detachment can be obtained. In addition, since the side corresponding to the drive IC can be separated first, damage to the drive IC can be reduced, and line defects can be prevented, thereby improving product reliability.

From the above description, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (9)

In the top chassis which prevents the display panel from flowing and protects the display panel from an external impact, Top sash characterized in that the detachable means is provided on the upper surface of the top sash so that the top sash detachable. The method of claim 1, The detachable means is a top sash, characterized in that formed on the corner of the top surface of the top sash. The method of claim 1, And the detachable means is formed between an upper surface of a top chassis corresponding to a source drive IC and a gate drive IC for driving the display panel, respectively. The method of claim 1, The detachable means is a top sash characterized in that the opening is formed in a diagonal direction from one side to the other side of the upper surface. A liquid crystal display panel for displaying a screen; A driving circuit unit for driving the liquid crystal display panel; An optical assembly providing light to the liquid crystal display panel; A mold frame for mounting the liquid crystal display panel; A top chassis to protect the liquid crystal display panel and prevent flow; Including, And a detachable means provided on an upper surface of the top chassis to facilitate detachment of the top chassis. The method of claim 5, And the detachable means is formed to facilitate detachment of the top chassis from the mold frame. The method of claim 5, And the detachable means is formed at an edge of an upper surface of the top chassis. The method of claim 5, And the detachable means is formed between a top surface of a top chassis corresponding to a source drive IC and a gate drive IC for driving the liquid crystal display panel, respectively. The method of claim 5, And the detachable means is formed to be opened in a diagonal direction from one side to the other side of the upper surface.

Images