KR100542314B1 - Apparatus for bending bezel and soldering flexible printed circuit of lcd device - Google Patents

Abstract

The present invention discloses a bezel bending and a flexible printed circuit soldering device of a liquid crystal display. In the disclosed invention, a feeding unit is arranged on the body frame. On the feeding unit, a bending unit is formed along the outer periphery of the bezel and downwardly bends a plurality of coupling ends that are pressed against the backlight of the liquid crystal display. On one side of the feeding unit, a soldering unit for soldering both ends of the FPC to each substrate of the liquid crystal display device is disposed. The feeding unit has a structure in which a servo motor is connected to one end of a lead screw disposed on the main frame, and the liquid crystal display device in which the bezel bending operation is completed by the bending unit is moved to a vertical lower position of the soldering unit. The bending unit includes a stage in which the liquid crystal display device is placed. Pneumatic cylinders are installed on each of the four sides of the stage, and a bending block is connected to each of the pneumatic cylinders by pushing down each engaging end of the bezel. The soldering unit includes a lifting operation and a robot operated in the front, rear, left and right directions. The robot includes a robot body installed on the body frame. The robot main body is provided with an elevating drive unit for elevating operation, a horizontal drive unit advancing back and forth on the Z-axis drive unit, and a rotation drive unit rotating in the horizontal plane on the horizontal drive unit. Solder tips for soldering the electrode pads of the FPC and the substrate are installed in the rotary drive.

Description

Bezel Bending and Flexible Printed Circuit Soldering Device of Liquid Crystal Display {APPARATUS FOR BENDING BEZEL AND SOLDERING FLEXIBLE PRINTED CIRCUIT OF LCD DEVICE}

1 shows a perspective view of an arrangement position of a device according to the invention.

2 is a perspective view of the device according to the invention.

3 is an enlarged plan view of a feeding and bending unit, which is an essential part of the present invention;

Figure 4 is a plan view showing two bending units provided in accordance with the size of the liquid crystal display device.

-Explanation of symbols for the main parts of the drawing-

10; Body frame 20; Feeding unit

21; Lead screw 22; Servo motor

30; Bending unit 31; stage

32; Pneumatic cylinders 33; Bending block

40; Soldering unit 41; Robot body

42; Lifting drive section 43; Horizontal drive unit

44; Rotary drive part 45; Solder tips

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bezel bending and flexible printed circuit (FPC) soldering apparatus of a liquid crystal display, and more particularly, to a bezel from a bezel for fixing a bezel to a backlight unit. The present invention relates to an apparatus for bending a plurality of protruding coupling ends to a back light unit side, and then soldering each terminal of an FPC to an electrode pad of each substrate to electrically connect the gate substrate and the source substrate.

In general, a liquid crystal display device includes a liquid crystal panel having a structure in which an upper glass on which a color filter is formed and a lower glass in which pixels are arranged in a matrix are attached with a liquid crystal interposed therebetween, and disposed under the liquid crystal panel to emit light to the liquid crystal panel. A backlight unit for illuminating, a gate and source substrate for applying a voltage to each pixel on the matrix of the liquid crystal panel and supplying a signal for driving the liquid crystal, and a drive IC connecting the electrode pads of each substrate and the lower glass are mounted. Is made of tape. On the other hand, the liquid crystal panel is firmly fixed to the mold frame of the backlight unit via the bezel installed on the upper portion thereof.

In this case, the edge portion where the gate substrate and the source substrate are adjacent to each other is connected to a flexible printed circuit (hereinafter referred to as FPC). That is, a connector is provided at both ends of the FPC, and each connector is connected to the connector provided on the gate board and the connector provided on the source board, respectively, so that the gate board and the source board are connected.

Here, the reason for connecting the gate substrate and the source substrate is that the driving voltage is transmitted to only one of the gate substrate and the source substrate, so that the driving voltage is also applied to the remaining substrates.

In this manner, when a driving voltage is applied to any one of the substrates, the driving voltage is also applied to the other substrate through the FPC. The driving voltage is applied to the electrode lines in the liquid crystal panel via the tape on which the drive IC is mounted, thereby driving the liquid crystal display device.

Here, the bezel is installed on the upper part of the liquid crystal panel, and the liquid crystal panel and the mold frame are firmly assembled through the bezel. There are two methods of assembling the bezel to the mold frame of the backlight unit. First, the screw fastening method, the other is a bending coupling method. Since the screw fastening method requires a separate component called a screw and also requires a work for fastening the screw, a bending coupling method is currently employed in which a separate part is not required. The bending coupling method is a method of bending down a plurality of, usually 14, coupling ends protruding along the periphery of the bezel, and pressing and assembling the mold frame of the backlight unit.

In addition, when the bezel assembly is completed, the operation of soldering the both ends of the FPC attached between the gate substrate and the source substrate to the electrode pad of each substrate proceeds.

However, conventionally, the bezel bending work and the FPC soldering work were relied on manually. For this reason, the bezel bending operation takes 16 to 20 seconds for one liquid crystal display device, and there is a problem that the bending operation time is too long. In addition, the bending operation sequentially bends all four sides of the bezel while rotating the bezel by 90 ° using one air cylinder, which causes a problem of scratches on the exterior of the LCD.

In addition, when soldering by hand, due to the deterioration of the precision of temperature, pressure and speed control, there is a problem that the FPC is damaged or a poor soldering often occurs.

Accordingly, the present invention has been made to solve all the problems caused by the conventional manual work, the bezel bending operation and FPC soldering operation is performed automatically, reducing the bezel bending time and scratches of the liquid crystal display device It is an object of the present invention to provide a bezel bending and flexible printed circuit soldering device of a liquid crystal display device which can prevent the damage and the soldering defect of the FPC.

In order to achieve the above object, the apparatus according to the present invention has the following configuration.

A feeding unit is arranged on the body frame. On the feeding unit, a bending unit is formed along the outer periphery of the bezel and downwardly bends a plurality of coupling ends that are pressed against the backlight of the liquid crystal display. On one side of the feeding unit, a soldering unit for soldering both ends of the FPC to each substrate of the liquid crystal display device is disposed.

The feeding unit has a structure in which a servo motor is connected to one end of a lead screw disposed on the main frame, and the liquid crystal display device in which the bezel bending operation is completed by the bending unit is moved to a vertical lower position of the soldering unit.

The bending unit includes a stage in which the liquid crystal display device is placed. Pneumatic cylinders are installed on each of the four sides of the stage, and a bending block is connected to each of the pneumatic cylinders by pushing down each engaging end of the bezel.

The soldering unit includes a lifting operation and a robot operated in the front, rear, left and right directions. The robot includes a robot body installed on the body frame. The robot main body is provided with an elevating drive unit for elevating operation, a horizontal drive unit advancing back and forth on the Z-axis drive unit, and a rotation drive unit rotating in the horizontal plane on the horizontal drive unit. Solder tips for soldering the electrode pads of the FPC and the substrate are installed in the rotary drive.

According to the above-described configuration of the present invention, the liquid crystal display device is bent at the bending end of the bezel in the bending unit, and then moved to the vertical lower portion of the soldering unit by the feeding unit, so that the soldering operation is performed automatically, so that the working time is greatly reduced. Further, scratches are not generated on the appearance of the liquid crystal display device, and soldering defects are also prevented.

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

1 is a perspective view showing the arrangement position of the device according to the invention, Figure 2 is a perspective view of the device according to the invention, Figure 3 is a plan view showing an enlarged feeding and bending unit of the main part of the invention, Figure 4 2 is a plan view illustrating two bending units according to the size of a liquid crystal display device.

As shown in FIG. 1, the bending and soldering device according to the invention is arranged between the assembly workbench 1 and the transfer line 2. In the assembling work platform 1, after inspecting the foreign matter of the backlight unit, the backlight and the liquid crystal panel are assembled, the bezel is mounted on the liquid crystal panel, and the FPC is attached to the side of the liquid crystal panel.

The liquid crystal display device after the assembly is completed is brought into the bending and soldering device according to the present invention. In figure 2 the device according to the invention is shown in detail. As shown in FIG. 2, the device according to the invention comprises a body frame 10. A pair of feeding units 20 are arranged on the main body frame 10, and a bending unit 30 is installed on the feeding unit 20. As described above, the bending unit 30 bends about 14 coupling end portions formed in the bezel downward to firmly assemble the bezel to the backlight unit. A soldering unit 40 is disposed at one side of the feeding unit 20 to solder the FPC of the bezel bent LCD to the electrode pads of the gate and the source substrate.

On the other hand, in Figs. 2 and 4, the feeding unit 20 is a pair, and thus the bending unit 30 is also shown in a pair. The reason is to be applied to the liquid crystal display of two sizes, and for this purpose, as shown in FIG. 4, a sensor 50 for detecting the size of the liquid crystal display is attached to the main frame 10. The liquid crystal display device carried by the sensor 50 is carried on the corresponding bending unit 30.

A bending unit 30 for bending each coupling end formed on the bezel of the liquid crystal display device, and a feeding unit 20 for moving the entire bending liquid crystal display device and the bending unit 30 below the soldering unit 40. ) Is shown in detail in FIG. 3.

As shown in FIG. 3, the feeding unit 20 includes a servo motor 22 and a lead screw 21. More specifically, in order to reduce the high speed power generated by the servo motor 22, the servo motor 22 and the lead screw 21 are not located in a straight line. In the meantime, that is, pulleys 23 and 24 are respectively provided on the shaft of the servo motor 22 and one end of the lead screw 21, and each pulley 23 and 24 is connected by a belt 25, so that the servo motor ( The power of 22 is transmitted to the lead screw 21 in a decelerated state.

Meanwhile, the bending unit 30 includes a stage 31 screwed to the lead screw 21 to reciprocate according to the rotation direction of the lead screw 21. That is, the liquid crystal display element is placed on the stage 31. Pneumatic cylinders 32 are mounted on each of the four surfaces of the stage 31, and bending blocks 33 are provided in the respective pneumatic cylinders 32. Thus, by simultaneously moving the four bending blocks 33 toward the center of the stage 31, a plurality of joining ends formed along the periphery of the bezel are bent downward and assembled to the backlight.

After the bezel bending is completed, the liquid crystal display is moved to the vertical lower position of the soldering unit 40 shown in FIG. 2 by the feeding unit 20. The soldering unit 40 includes a robot body 41 installed on the body frame 10. The robot main body 41 is connected to a lift driver 42 which is lifted and lowered, and a horizontal driver 43 which is moved back and forth on the horizontal plane is connected to the Z-axis driver 42. The rotary drive unit 44 rotating on the horizontal plane is connected to the horizontal drive unit 43, and a solder tip 45 for soldering the electrode pads of the FPC and the substrate is installed at the bottom end of the rotary drive unit 44. On the other hand, the controller 46 for controlling the supply amount of the solder provided to the solder tip 45 is disposed on the side of the robot body 41.

Hereinafter, the operation of the apparatus configured as described above will be described in detail.

When the liquid crystal display device is placed on the stage 31 of the bending unit 30, four pneumatic cylinders 32 are driven to advance each bending block 33, so that a plurality of coupling ends formed along the periphery of the bezel Is bent downward and firmly coupled to the backlight. Bending time is drastically shortened to about 3 to 5 seconds from the conventional 16 to 20 seconds.

When the bezel bending is completed, the liquid crystal display is moved vertically downward of the soldering unit 40 by the feeding unit 20. That is, since the driving force of the servo motor 22 is transmitted to the lead screw 21 through the belt 25, the stage 31 of the bending unit 30 screwed to the lead screw 21 is the soldering unit 40. By moving to the vertical bottom of, the liquid crystal display device is moved to the soldering position.

When the movement is completed, the solder tip 45 is moved by the elevating drive 42, the horizontal drive 43, and the rotation drive 44 onto the bonding position between the FPC and the electrode pad of the substrate, thereby soldering the FPC and the electrode pad. Done. At this time, the amount of solder supplied to the solder tip 45 is controlled by the controller 46.

According to the present invention as described above, the bending and soldering operation is automatically performed, the working time is greatly reduced. In particular, since the bending operation is performed fully automatically, scratches are not generated on the appearance of the liquid crystal display device.                     

In addition, the soldering operation is performed automatically, so that temperature, pressure, and solder supply amount can be accurately controlled, thereby preventing soldering defects and damaging the FPC.

On the other hand, the present invention is not limited to the above-described specific preferred embodiments, and various changes can be made by those skilled in the art without departing from the gist of the invention claimed in the claims. will be.

Claims (1)

In order to assemble the liquid crystal panel and the backlight unit of the liquid crystal display device, a plurality of coupling ends formed along the outer side of the bezel installed on the upper portion of the liquid crystal panel are bent downward to be coupled to the backlight unit, and the side portion of the liquid crystal panel An apparatus for soldering an end portion of a flexible printed circuit for electrically connecting a gate substrate and a source substrate disposed along a side to an electrode pad of each substrate, Body frame; A feeding unit installed on the main body frame; A bending unit installed in the feeding unit and reciprocating to bend each coupling end of the bezel of the liquid crystal display; And And a soldering unit configured to solder the ends of the flexible printed circuit of the liquid crystal display device moved by the feeding unit after the bending operation is completed in the bending unit, to an electrode pad of each substrate, The feeding unit includes a lead screw installed on the main frame; And a servo motor for rotating the lead screw, The bending unit may be screwed to the lead screw to seat the liquid crystal display device; A pneumatic cylinder disposed on four sides of the stage; And a bending block connected to each of the pneumatic cylinders to downwardly bend the respective coupling end of the bezel, The soldering unit includes a robot body installed on the body frame; A lift driver connected to the robot body; A horizontal driver connected to the lifting driver; A rotation drive connected to the horizontal drive; And a solder tip installed at the rotation driving unit, the solder tip soldering the flexible printed circuit and the electrode pad to each other.

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