KR100745796B1 - Load cell board for LCD panel cutting apparatus and the scribing control method thereby light exposure apparatus for manufacturing flat panel display based on laser - Google Patents

Abstract

The present invention relates to a load cell of an LCD panel cutting device, which is input from a load cell that senses a load applied to a wheel or roller for cutting a bonded substrate during a scribing operation of forming a groove in a substrate in a large-sized TFT-LCD panel cutting device. The purpose is to enable rapid and precise control of the driving of the wheel or roller in the vertical direction based on the load value. The present invention constituted for this purpose is a Z servo motor for an upper wheel for generating a rotational power for elevating the upper wheel, the upper roller, and the lower wheel in a vertical direction, respectively, to form a groove in at least one surface of the bonded substrate of the TFT substrate and the CF substrate. , Z servo motor for roller and Z servo motor for lower wheel; An upper servo Z servo motor for driving each of the upper servo Z servo motor, the roller Z servo motor and the lower wheel Z servo motor; Z-servo drive for roller and Z-servo drive for lower wheel; A load cell circuit part including a load cell in which an upper wheel or an upper roller and a lower wheel respectively sense load values applied to the bonded substrate; An I / O interface which is responsible for an input / output interface between an external motion board generating pulse signals for the upper wheel Z servo motor, pulse signals for the roller Z servo motor, and pulse signals for the lower wheel Z servo motor, respectively; And Z servo drive part for upper wheel, Z servo drive part for roller and lower wheel by pulse signal for upper wheel Z servo motor, pulse signal for roller Z servo motor and pulse signal for lower wheel Z servo motor inputted through I / O interface. Z servo motor for control of Z servo motor, Z servo motor for upper wheel or upper roller to correct vertical position of upper wheel or upper roller according to the result of comparing each actual load value detected by load cell with preset reference load value It includes a microcontroller for performing the forward and reverse control of the servo motor and the Z servo motor for the lower wheel.

LCD panel, cutting, load cell, load value, upper wheel, lower wheel, roller, reference

Description

Load cell board for LCD panel cutting apparatus and the scribing control method thereby light exposure apparatus for manufacturing flat panel display based on laser}

1 is a plan view showing a large-sized TFT-LCD panel cutting device according to the present invention.

Figure 2 is a front view showing a large TFT-LCD panel cutting device according to the present invention.

Figure 3 is a side view showing a large TFT-LCD panel cutting device according to the present invention.

4 is a perspective view showing a detailed structure of the upper and lower wheel assembly of the large-sized TFT-LCD panel cutting device according to FIG.

Figure 5a is a side view schematically showing the formation of grooves or cracks in the bonded substrate through the upper and lower wheels of the LCD panel cutting device according to the present invention.

Figure 5b is a side view schematically showing the formation of grooves in the CF substrate attached on the lower surface of the bonded substrate through the upper roller and the lower wheel of the LCD panel cutting device according to the present invention.

6 is an explanatory diagram for explaining a scribing direction and procedure in the LCD panel cutting device according to the present invention;

Figure 7 is a block diagram showing the electrical configuration of the load cell board in the LCD panel cutting device according to the present invention.

8 is a flowchart showing a scribing control method by a load cell board in the LCD panel cutting device according to the present invention.

9A and 9B are explanatory views for explaining a scribing process by an upper wheel to a lower wheel and an upper roller to a lower wheel in the scribing control method of the LCD panel cutting device according to the present invention.

10 is a computer screen illustrating a load setting input window of the upper wheel and the lower wheel in the scribing control method of the LCD panel cutting device according to the present invention.

11A and 11B are graphs for explaining a vertical calibration process of a lower wheel and an upper wheel in a scribing control method of an LCD panel cutting device according to the present invention;

[Description of Symbols for Main Parts of Drawing]

10. Bonded substrate 10u. TFT substrate

10l. CF substrate 100. TFT-LCD panel cutting device

110. Body frame 112. Guide rail

120. Chuck units 130, 130a. Mobile

140, 140a. Movable linear motor 150, 150a. conveyor

160, 160a. Upper and lower wheel assembly 161. Z servo motor for upper wheel

161a. Z servo motors for lower wheels 162, 162a, 166. Ball screws

163, 163a, 167. Load Cell 164. Upper Wheel

164a. Lower wheel 165a. Y Servo Motor for Lower Wheel

165. Z Servo Motor for Upper Roller 168. Upper Roller

170, 170a. Wheel assembly driven linear motor

180. Wheel Assembly Guide Rail

190. Align Mark and Scribing Line Recognition Vision

200. Motion board group 210. Motion board for upper wheel Z servo

220. Lower Servo Z Servo Motion Board 230. Upper Roller Z Servo Motion Board

300. Load cell board 310. Microcontroller

320. I / O Interface 330. Z Servo Drive for Upper Wheel

334. Load cell circuit unit 336. Encoder pulse generator

340. Z Servo Drive for Lower Wheel 344. Load Cell Circuit

346. Encoder pulse generator 350. Z servo drive unit for upper roller

354. Load Cell Circuit 356. Encoder Pulse Generator

The present invention relates to a load cell board of an LCD panel cutting device and a scribing control method through the same, and more particularly, to an upper wheel assembly and a lower part in a scribing operation of forming a groove in a substrate in a large TFT-LCD panel cutting device. Load cell board and scribing through the LCD panel cutting device for quickly and precisely controlling vertical driving of the upper wheel, upper roller, and lower wheel based on load values input from load cells included in the wheel assembly, respectively. It relates to a control method.

In general, as much attention has been focused on the enlargement and high quality of the display device, which is a medium for transmitting image information, various flat panel display devices have been developed and disseminated in place of the CRT (Cathode Ray Tube), which has been used until now. Also, it is noted that the liquid crystal display, which is one of the flat panel display devices, has been developed to a level higher than the CRT in view of color of image quality.

A general manufacturing process of a liquid crystal display panel (LCD) constituting the liquid crystal display device as described above is as follows. First, as an overview, one pixel (comprising three subpixels R, G, and B) of a TFT-LCD panel is as fine as about 0.3 mm in width. Of course, the size of TFTs (Thin Film Transistors) contained therein is smaller. What's more, the resolution is 1600 x 1200, which means that the number of pixels is 1.19 million. If you consider each sub-pixel, you need 3 times (R, G, B), so you need 576 million TFTs. Therefore, a semiconductor level process is required as a process that requires high precision of the entire process itself.

On the other hand, the TFT-LCD panel manufacturing process is divided into a TFT process, a color filter (hereinafter simply referred to as "CF") process, a cell process, and a module process. One panel is made with two glass cells through a cell process, and one panel with a cell process is made through a module process to make a TFT-LCD panel that actually enters a monitor or TV.

First, the TFT process is a process of forming a basic electrode, which makes the electrode of each cell as the most basic and essential process. The process sequence includes five steps of gate electrode generation, insulating film and semiconductor film generation, data electrode generation, protective film generation, and pixel electrode generation, but at least one pattern process is required for each step. This pattern process can be called the core of the TFT-LCD panel manufacturing process. Similar pattern processes are required for the CF process as well as the TFT process.

The pattern process as described above is a very precise and complicated process by itself. At least this process is performed several times to make a single TFT-LCD panel. Of course, the same process is not used then, but the schematic process is similar. This pattern process consists of deposition, cleaning, photoresist (PR) coating, exposure, development, etching (PR) process, PR stripping (Strip process), and inspection process. This is necessary.

TFT-LCD, on the other hand, does not emit each cell by itself like PDP or OLED (organic EL), but controls the brightness of light by controlling the arrangement of liquid crystals in each cell for constant light from the backlight. Since the backlight itself is white light, CF (Color Filter) plays an important role in changing the arrangement of liquid crystals to control the amount of light, but to make R, G, and B to realize color. This CF is located on the top of the TFT-LCD panel and is made through a process separate from the TFT process. The CF process also requires the pattern process described above.

The above-described CF (Color Filter) process requires a BM (Black Matrix) process (deposition, cleaning, PR coating, exposure, development, etching, and peeling pattern process), and pixel-by-pixel process (this pattern process was performed as described above. It is a slightly different process from the process of evaporation and cleaning, and it is possible to apply the photosensitive material with color and go through the process of exposure and development) and ITO process (Indum Tin Oxide: good permeability and conductivity, chemical and thermal stability Excellent transparent electrode material). In addition, some additional processes may be added depending on the type of panel (VA, IPS, TN, etc.).

Next, the cell process is a process of combining and cutting two glasses made in the CF process and the TFT process into one, and cleaning the CF and TFT, alignment film printing, rubbing process, spacer spreading, and bonding (TFT). The substrate and the CF substrate are precisely bonded; hereafter, the bonded substrates are referred to as a "bonded substrate", cutting (cutting the bonded substrate into separate panels), liquid crystal injection, and final inspection.

Lastly, the module process of the above-described manufacturing process is a final step for attaching a polarizing plate, a PCB, a backlight unit, etc. to a panel made of a cell process as a final process for making a finished product panel, and cleaning, attaching a polarizing plate, attaching a TAB, and defoaming ( Autoclave, PCB attachment, BLU (Back Light Unit) assembly and inspection.

Meanwhile, a cutting process of cutting the bonded substrate is performed through a bonding process of precisely bonding the TFT substrate and the CF substrate, which have undergone the TFT process and the CF process, in the cell process of the TFT-LCD panel manufacturing process as described above. In the cutting process, one end of the CF substrate is cut to attach the TAB after cutting the bonded substrate to separate the bonded substrate of the TFT substrate and the CF substrate into the panel. In this case, the LCD panel cutting device is an apparatus for cutting one end of the CF substrate for cutting the bonded substrate of the TFT substrate and the CF substrate and for attaching the TAB.

However, in the conventional LCD panel cutting device as described above, a groove having a desired depth (hereinafter referred to as "groove") on the bonded substrate by controlling the torque amount of the servomotor controlling the vertical position of the wheel or roller for cutting the bonded substrate. According to this, not only does not precisely control the cutting depth of the groove, but also it is difficult to quickly compensate when the cutting depth exceeds the allowable limit, and it is not easy to monitor the torque amount of the servomotor. There is a problem.

The present invention has been proposed to solve the above-mentioned problems of the prior art, and detects the load applied to the wheel or roller for cutting the bonded substrate during the scribing operation of forming a groove in the substrate in the large-sized TFT-LCD panel cutting device. The purpose of the present invention is to provide a load cell board of the LCD panel cutting device and a scribing control method through the LCD panel cutting device which can control the driving of the wheel or roller in the vertical direction quickly and precisely based on the load value input from the load cell. have.

In addition, the technique according to the present invention is based on the load value input from the load cell for sensing the load applied to the wheel or roller for cutting the bonded substrate during the scribing operation to form a groove in the substrate in a large-sized TFT-LCD panel cutting device Fast and precise control of the vertical movement of wheels and rollers not only improves the reliability of the product, but also the log files transmitted from the load cell board to ensure that the current scribing conditions are appropriate or load by distance Value in real time.

The present invention configured to achieve the above object is as follows. That is, the load cell board of the LCD panel cutting device according to the present invention has a rotational power for elevating the upper wheel, the upper roller and the lower wheel to form a groove on at least one surface of the bonded substrate of the TFT substrate and the CF substrate, respectively, in the vertical direction. Z servo motor for upper wheel, Z servo motor for roller and Z servo motor for lower wheel to generate; An upper wheel Z servo motor driving the upper servo Z servo motor, the roller Z servo motor and the lower wheel Z servo motor, respectively; Z-servo drive for roller and Z-servo drive for lower wheel; A load cell circuit unit including a load cell for sensing a load value applied by the upper wheel or the upper roller and the lower wheel to the bonded substrate; An I / O interface which is responsible for an input / output interface between an external motion board generating pulse signals for the upper wheel Z servo motor, pulse signals for the roller Z servo motor, and pulse signals for the lower wheel Z servo motor, respectively; And Z servo drive part for upper wheel, Z servo drive part for roller and lower wheel by pulse signal for upper wheel Z servo motor, pulse signal for roller Z servo motor and pulse signal for lower wheel Z servo motor inputted through I / O interface. Z servo motor for control of Z servo motor, Z servo motor for upper wheel or upper roller to correct vertical position of upper wheel or upper roller according to the result of comparing each actual load value detected by load cell with preset reference load value It consists of a configuration including a microcontroller that performs the forward and reverse control of the servo motor and the Z servo motor for the lower wheel.

In the configuration of the present invention as described above, communication with an external upper PC may be performed by USB.

On the other hand, the scribing control method through the load cell board of the LCD panel cutting device of the present invention in the vertical direction of the upper wheel, the upper roller and the lower wheel to form a groove on at least one surface of the bonded substrate of the TFT substrate and CF substrate, respectively And a load cell board having a lifting means for lifting and lowering a load cell and a load cell sensing a load value applied by the upper wheel or the upper roller and the lower wheel to the bonded substrate, respectively (a) to start a scribing operation for forming a groove. step; (b) receiving a real load value detected by the load cell in a scribing operation in real time; (c) determining whether the actual load value deviates from a predetermined operating stability range; And (d) As a result of the determination in step (c), if the actual load value does not deviate from the operating stability range, the upper wheel or the upper roller and the lower wheel are kept in the current state, and in case of deviation, the upper wheel is compensated for. Or performing vertical position correction of the upper roller and the lower wheel.

As described above, the configuration according to the present invention comprises the steps of (e) comparing the actual load value with the positive and negative hunting values, which are set outside the operating stability range and represent the maximum and minimum allowable load values, respectively. ; And (f) stopping the scribing operation when the actual load value deviates from the (+) hunting value and the (-) hunting value.

In addition, the present invention as described above may further include (g) transferring a log file containing the detected actual load data to an external upper PC.

Hereinafter, with reference to the accompanying drawings, a load cell board and a scribing control method of the LCD panel cutting apparatus according to an embodiment of the present invention will be described in detail, a general LCD panel cutting device to help the understanding of the present invention Briefly describes the overall structure of the.

1 is a plan view showing a large TFT-LCD panel cutting device according to the present invention, Figure 2 is a front view showing a large TFT-LCD panel cutting device according to the present invention, Figure 3 is a large TFT-LCD panel cutting according to the present invention Side view of the device.

As shown in FIGS. 1 to 3, a large TFT-LCD panel cutting device 100 according to the present invention is installed at a predetermined height on a flat surface, but a body having guide rails 114 provided in a length direction on both sides thereof. On the guide rail 112 of the body frame 110, the chuck unit 120 and the body frame 110, which are provided with a plurality of predetermined heights on the front side of the frame 110 and the body frame 110, to hold one end of the bonded substrate 10. Two movable bases 130 and 130a which are provided at a predetermined interval before and after to be able to slide back and forth, the movable stage drive linear motors 140 and 140a which move the front and rear movable stages 130 and 130a back and forth, respectively, before and after each movable stage (130, 130a) is installed on the upper and lower ends of the conveyor (150, 150a), the rear side movable table (130a) installed by the drive motor so as to be rotated back and forth by the drive motor is installed in the transverse direction to the bonded substrate (10) Forming grooves in the upper and lower surfaces of the The upper and lower wheel assemblies 160 and 160a and the upper and lower wheel assemblies 160 and 160a, which are provided with upper and lower wheel units (not shown), which are referred to as “scribing” processes. The wheel assembly driving linear motor 170 and 170a for linearly moving in the lateral direction, the wheel assembly guide rail 180 and the chuck unit 120 and the front conveyor 150 for guiding the upper and lower wheel assemblies 160 and 160a. The alignment mark and the scribing line recognition vision 190 of inspecting the aligning mark (Align mark) and the scribing line of the bonded substrate 10 fixedly supported on the image is composed of.

Through the large TFT-LCD panel cutting device 100 according to the present invention configured as described above panel panel bonded substrate 10 obtained through a bonding process for precisely bonding the TFT substrate and the CF substrate through the TFT process and CF process The scribing operation of the bonded substrate 10 in order to separate it into a chuck, first, the chucked end of the bonded substrate 10 in the state in which the bonded substrate 10 is placed on top of the conveyor 150 of the front moving table 130 Bit and fix through the unit 120. After fixing the front end of the cemented substrate 10 supported on the conveyor 150 of the front moving table 130 through the chuck unit 120, the driving table driving linear motors 140 and 140a are driven. The upper and lower wheel assemblies 160 and 160a of the upper and lower wheel assemblies 160 and 160a are moved while moving the front and rear moving tables 130 and 130a to position the upper and lower wheel assemblies 160 and 160a at the scribing working position of the bonded substrate 10. The upper and lower wheel units are moved to the upper and lower surfaces of the bonded substrate 10 so that the upper and lower wheels described later contact the upper and lower surfaces of the bonded substrate 10.

Meanwhile, as described above, the upper and lower wheel units are moved to the upper and lower surfaces of the bonded substrate 10 so that the upper wheel and the lower wheel come into contact with the upper and lower surfaces of the bonded substrate 10 to drive the movable table. When the linear motors 140 and 140a are driven to advance (scribing) the movable tables 130 and 130a, grooves are formed in upper and lower surfaces of the bonded substrate 10 by the upper wheel and the lower wheel. After the groove is formed on the cemented substrate 10 by the length set in the longitudinal direction of the front and rear, the driving of the movable drive linear motors 140 and 140a is stopped to finish the scribing operation in the longitudinal direction, which will be described later. The wheel assembly driving linear motors 170 and 170a are driven to move the upper and lower wheel assemblies 160 and 160a in the lateral direction to perform a scribing operation in the lateral direction. This scribing operation will be described later in detail.

As described above, the upper and lower wheel assemblies 160 and 160a are moved in the transverse direction in a state where grooves are formed in the upper and lower surfaces of the bonded substrate 10 in the longitudinal direction of one side by advancing the movable bases 130 and 130a by the method. After moving to form a groove in the bonded substrate 10 in one side transverse direction, the moving base (130, 130a) is reversed to form a groove in the bonded substrate 10 in the longitudinal direction of the other upper and lower wheel assembly ( By moving the 160 and 160a in the direction of the starting point of the upper wheel and the lower wheel to form a groove in the bonded substrate 10 to be separated into a panel through the cutting of the grooved portion.

On the other hand, after separating the bonded substrate 10 to the panel as described above, the upper substrate and the lower wheel of the lower wheel assembly 160a of the upper roller unit, which will be described later configured in the upper wheel assembly 160, the groove is formed The grooves are formed at one side of the CF substrate for attaching the TAB by placing them at the upper and lower portions of (10). A more detailed configuration of the TFT-LCD panel cutting device is described in Korean Patent Application No. 2004-88828 filed under the name of the invention "Large TFT-LCD Panel Cutting Device" (Publication No. 10-2004-99220, Publication Date: Since November 26, 2004), further description thereof will be omitted.

4 is a perspective view showing a detailed structure of the upper and lower wheel assembly of the large TFT-LCD panel cutting device according to FIG.

As shown in FIG. 4, the upper wheel assembly 160 detects a load applied to the upper wheel 164 and the upper wheel 164 for forming a groove in the upper substrate of the bonded substrate 10, that is, the TFT substrate. Load cell 163, upper servo Z servomotor 161 for generating rotational power for moving the upper wheel 164 in the vertical (hereinafter also referred to as "Z axis" or "Z") direction, upper servo Z servo motor ( Ball screw 162 is coupled to the shaft of the 161 to elevate the upper wheel 164, installed in parallel with the upper wheel 164, the upper roller 168, the upper roller 168 for pressing the TFT substrate when forming the TAB A shaft of a load cell 167 that senses the load applied to the upper surface, the Z servo motor 165 for the upper roller, and the Z servo motor 165 for the upper roller, which generate rotational power for moving the upper roller 168 in the vertical direction. It comprises a ball screw 166 coupled to and lifting the upper roller 168.

Next, the lower wheel assembly 160a is provided with the lower wheel 164a installed to face the configuration of the upper wheel 164 and the upper roller 168 to form a groove in the lower substrate of the bonded substrate 10, that is, the CF substrate. ), A load cell 163a for detecting a load applied to the lower wheel 164a, a lower wheel Z servo motor 161a for generating rotational power for moving the lower wheel 164a in the vertical direction, and a lower servo Z servo motor ( Ball screw 162a coupled to the shaft of 161a to lift lower wheel 164a, lower wheel 164a such that lower wheel 164a is aligned in a position opposite to upper wheel 164 or upper roller 168. Is coupled to the axes of the lower wheel Y servo motor 165a and the lower wheel Y servo motor 165a for generating power to move the wheel in the horizontal direction (hereinafter referred to as "Y axis direction"). It may comprise a moving ball screw (166a).

Figure 5a is a side view schematically showing the formation of grooves or cracks in the bonded substrate through the upper and lower wheels of the LCD panel cutting device according to the present invention, Figure 5b is an upper roller and a lower wheel of the LCD panel cutting device according to the invention The side view schematically showing the formation of grooves in the CF substrate attached on the lower surface of the bonded substrate through.

 First, in order to cut the bonded substrate 10 as shown in FIG. 5A, the upper wheel 164 is pressed against the TFT substrate 10u of the bonded substrate 10 to a predetermined depth, and together with the lower wheel 164a. The drive wheel linear motor 140, 140a or the wheel assembly drive linear with the upper wheel 164 aligned with the upper wheel 164, and pressed again to a predetermined depth against the CF substrate 10l of the bonded substrate 10 The motors 170 and 170a are driven to form grooves in both the TFT substrate 10u and the CF substrate 10l.

On the other hand, to form the TAB, as shown in FIG. 5B, the upper roller 168 is pressed against the TFT substrate 10u of the bonded substrate 10, and together with the upper wheel 164a, the lower wheel 164a is pressed. And move the movable base drive linear motors 140 and 140a or the wheel assembly drive linear motors 170 and 170a in a state in which they are aligned to face each other and are pressed again to a predetermined depth against the CF substrate 10l of the bonded substrate 10. By driving, grooves are formed only in the CF substrate 10l.

6 is an explanatory view for explaining a scribing direction and order in the LCD panel cutting device according to the present invention, the solid arrow indicates the scribing operation direction and trajectory, the dotted arrow indicates the upper wheel or upper roller and The direction and the trajectory of the lower wheel are shown.

As shown in FIG. 6, in order to cut a large TFT-LCD panel consisting of one sheet into several sheets having a smaller size, for example, a total of 12 small TFT-LCD panels, a front side moving table ( In the state in which the cemented substrate 10 is placed on the conveyor 150 of the 130, the tip portion of the cemented substrate 10 is buried and fixed through the chuck unit 120. In this state, the upper wheel 164 and the lower wheel 164a or the upper roller 168 and the lower wheel 164a are brought into contact with the bonded substrate 10 with a predetermined load, and the direction and trajectory as shown by the solid line. The scribing operation along the upper wheel 164 and the lower wheel 164a or the upper roller 168 and the lower wheel 164a during the movement for the next scribing operation. In the state of releasing contact with, it moves in a zigzag along the direction and trajectory as shown by the dotted line.

7 is a block diagram showing the electrical configuration of the load cell board in the LCD panel cutting apparatus according to the present invention.

As shown in FIG. 7, the electrical configuration of the load cell board of the LCD panel cutting device according to the present invention is largely for the microcontroller 310 for overall control of the overall operation of the load cell board 300, respectively, for the upper wheel Z servo motor. Motion board 210 for the upper wheel Z servo, motion board 220 for the lower wheel Z servo, and motion board for the roller Z servo that generates pulse signals, pulse signals for the lower wheel Z servo motor, and pulse signals for the roller Z servo motor. I / O interface 320 in charge of the input / output interface between the motion board group 200, including the 230, USB between the host PC and the overall control of the overall operation of the LCD panel cutting device (Universal Serial Bus) consisting of a USB communication unit 360 supporting the communication, the upper wheel Z servo drive unit 330 for driving the Z servo motor 161, the load cell 163 consists of a configuration including the upper wheel 164 By plywood The load cell circuit unit 334 for the upper wheel and the encoder pulse signal for the precise control of the Z servo for the upper wheel are generated by detecting the pressure load value of the plate 10 on the TFT substrate 10u and providing it to the microcontroller 310. Encoder pulse generator 336 to transfer to the wheel Z servo motion board 210, the lower wheel Z servo drive unit 340 for driving the Z servo motor 161a for the lower wheel, consisting of a configuration including a load cell (163a) The load cell circuit unit 344 for the lower wheel and the Z servo for the lower wheel for detecting the pressurized load value of the cemented substrate 10 by the wheel 164a to the CF substrate 10l and providing it to the microcontroller 310. The encoder pulse generator 346 for generating an encoder pulse signal and transmitting the encoder pulse signal to the motion board 220 for the lower wheel Z servo, the Z servo driver 350 for the roller which drives the Z servo motor 165 for the upper roller, and the load cell ( 167) consisting of an upper roller 168 Encoder for precise control of the roller load cell circuit unit 354 and the roller Z servo motor 352 for detecting the pressurized load value of the bonded substrate 10 to the TFT substrate 10u and providing it to the microcontroller 310. It may include the encoder pulse generator 356 for generating a pulse signal and transmitting to the roller Z servo motion board 230.

In the above-described configuration, each of the encoder pulse generators 336, 346, and 356, as is well known, includes a slit disc (not shown) and a slit of a slit disc, in which a plurality of slits are arranged at equal intervals at the edge of the disc. Rotation angle of the upper wheel Z servo motor 161, the lower wheel Z servo motor 161a and the upper roller Z servo motor 165, consisting of a configuration including a photo coupler (not shown) disposed to face each other, That is, the lifting amount of the upper wheel 164 and the lower wheel 164a and the upper roller 168 is sensed and then provided to the corresponding motion boards 210, 220, and 230.

On the other hand, each motion board (210, 220, 230) is based on the above-mentioned pulse signal provided by the respective encoder pulse generator 336, 346, 356, the upper wheel 164, lower wheel 164a or upper Pulse signal for controlling the Z servo motor 161 for the upper wheel, the Z servo motor 161a for the lower wheel, and the Z servo motor 165 for the upper roller, ie, CW (Clockwise) or CCW, for driving the roller 168 up and down, respectively. Generates a (Counter Clockwise) pulse signal. Next, the I / O interface 320 is a Z servo motor 161 for the upper wheel, a Z servo motor 161 a for the lower wheel and an upper roller between each of the motion boards 210, 220, 230 and the load cell board 300. Z servo motor 165 control pulse signal is transmitted to the microcontroller 310 of the load cell board 300 and the encoder pulses provided from the respective encoder pulse generators 336, 346, 356 corresponding motion board 210, It is responsible for the input / output interface, such as 220, 230. Finally, the USB communication unit 360 transmits the set load values of the upper wheel 164, the lower wheel 164a, and the upper roller 168 generated at the upper PC (not shown) to the load cell board 300, and load cell It is responsible for Ethernet communication functions such as transferring the log file of the actual load value of the upper wheel 164, lower wheel 164a and the upper roller 168 detected by the board 300 to the upper PC.

8 is a flowchart illustrating a scribing control method by a load cell board in the LCD panel cutting apparatus according to the present invention, and unless otherwise stated, the microcontroller 310 is mainly performed.

As shown in FIG. 8, first, in step S100, the set load value of the upper wheel 164, the lower wheel 164a, and the bonded substrate 10 of the upper roller 168 from the upper PC via the USB communication unit 360. After receiving it, it is stored in the built-in data storage (not shown).

Next, in step S102, the scribing frequency counter Cs to be scribed to one large TFT-LCD panel bonding substrate 10 is initialized to obtain several small panels. In the subsequent step S106, the upper servo Z servo or roller Z servo and lower wheel Z servo driving CW or CCW pulse signals are received from the motion boards 210, 220 and 230, respectively.

Next, in step S106, the upper wheel Z servo motor 161, the roller Z servo motor 165, and the lower wheel Z servo motor 161a are driven by the CW or CCW pulse signals transmitted in step S104. The scribing operation is started while the upper roller 168 and the lower wheel 164a are pressed against the TFT substrate 10u and the CF substrate 10l of the bonded substrate 10 at a set load value.

9A and 9B are explanatory views for explaining a scribing process by an upper wheel to a lower wheel and an upper roller to a lower wheel in the scribing control method of the LCD panel cutting device according to the present invention.

In the scribing operation for cutting as shown in FIG. 9A, the upper wheel 164 and the lower wheel 164a are dotted lines shown on the TFT substrate 10u and the CF substrate 10l of the bonded substrate 10, respectively. In the scribing operation for forming the TAB, the lower wheel 164a is pressed while the surface of the TFT substrate 10u of the bonded substrate 10 is pressed by the upper roller 168 during the scribing operation for forming the TAB. Only the grooves formed by the dotted line depth shown in the CF substrate 10l are formed. 9A and 9B, Wheel Depth Time refers to the time taken to reach the Wheel Depth Gap from the wheel position before the start of scribing.

8 again, in step S108, an actual load value is input from each load cell circuit unit 334, 344, 354 at a predetermined time period, for example, 5 ms cycle, and in step S110, the actual load value (analog) thus input is input. A / D conversion of the signal) into a digital signal of a corresponding magnitude, and in the next step S112, it is determined whether the actual load value thus converted is out of a predetermined stable range.

As a result of the determination in step S112, when the detected load values of the load cells 163, 163a, and 167 are maintained within the set stability range, the Z servo motor 161 for the upper wheel or the Z servo motor 165 for the upper roller and the lower wheel are used. While the Z servo motor 161a is kept in its current state, the process proceeds directly to step S118, but when it is out of the set stability range, the process proceeds to step S114 again to determine a predetermined positive or negative hunting value (described later). To determine if it deviates.

10 is a computer screen illustrating load setting input windows of an upper wheel and a lower wheel in a scribing control method of an LCD panel cutting device according to the present invention.

As shown in FIG. 10, the operator of each of the load cells 163 and 163a appears in the load setting input window of the upper wheel 164 and the lower wheel 164a, which are displayed on the computer screen while the cutting control program is executed on the upper PC. The desired load value can be set. In FIG. 10, "(+) settling value" and "(-) settling value" respectively indicate the load values applied to the upper wheel 164 and the lower wheel 164a during the scribing operation, that is, the stable operation range of the load cell detection value. "(+) Hunting value" and "(-) Hunting value" are the load values applied to the upper wheel 164 and the lower wheel 164a, that is, the upper limit of the load cell detection value. And an acceptable lower limit.

Furthermore, in the example of FIG. 10, the positive settling value of the upper wheel 164 is 0.780 kg, the negative settling value is 0.750 kg, the (+) hunting value is 0.785 kg, and the (-) hunting value is 0.745 kg. On the other hand, the (+) stability value for the lower wheel 164a was 0.980 kg, the (-) stability value was 0.750 kg, the (+) hunting value was 0.985 kg, and the (-) hunting value was 0.945 kg, respectively. It is set to a value larger than the set load value for the upper wheel 164, because the lower wheel 164a receives a greater load than the upper wheel 164 during the scribing operation.

11A and 11B are graphs for explaining a vertical correction process between the lower wheel and the upper wheel in the scribing control method of the LCD panel cutting device according to the present invention.

As shown in FIGS. 11A and 11B, the load values applied to the upper wheel load cell 163 and the lower wheel load cell 163a during the scribing operation are respectively determined by positive variations due to uneven strength of the bonded substrate 10. value (W _uua, W _lua) and (-) in the intermediate value, for example, in Figure 10 of the inner value (W _ula, W _lla) is changed as shown by a dotted line around the 0.765㎏ and 0.965㎏. At this time, when the load value applied to the load cell 163 in the case of the upper wheel 164 exceeds (+) _{stabilization} value (W _uua ) immediately move the Z servo motor 161 for the upper wheel, for example, CW direction The load value applied to the load cell 163 is reduced by rotating in the direction of the load cell. On the other hand, when the servo motor 161 for the upper wheel is rotated in the CCW direction, for example, when the load value _falls below the (-) _{stabilization} value (W _ula ), The load value applied to the load cell 163 is increased.

On the other hand, in the case of the lower wheel 164a described above, when the load value applied to the load cell 163a exceeds the positive stability value W _lua , the Z servo motor 161a for the lower wheel is immediately taken as an example. For example, by rotating in the CW direction, the load value applied to the load cell 163a is reduced. On the other hand, when the load is below the _negative setpoint value W _lla , the Z servo motor 161a for the lower wheel is moved in the CCW direction, for example. By rotating, the load value applied to the load cell 163a is increased.

Returning to FIG. 8 again, if the actual load value _{deviates from} each of the (+) Hunting values (W _uuh , W _luh ) or (-) Hunting values (W _ulh , W _llh ) as a result of the determination in step S114, the process returns to step S124. Proceeds immediately stop the scribing operation, and again in step S126 to inform the motion board (210, 220, 230) of the fact that the motion board (210, 220, 230) to generate an alarm. Thereafter, each motion board 210, 220, 230 is a load signal to the load cell board 300 to instruct the release of the pressure on the bonded substrate 10 of the upper wheel 164 or the upper roller 168 and the lower wheel 164a. The microcontroller 310 controls the upper wheel Z servo motor 161 or the roller Z servo motor 165 and the lower wheel Z servo motor 161 a to control the upper wheel 164 or the upper wheel. Pressing of the roller 168 and the lower wheel 164a onto the bonded substrate 10 is released. Of course, the depressurization may be performed by the microcontroller 310 independently without instructions of the motion boards 210, 220, and 230.

On the other hand, as a result of the determination in step S114, the actual load value is each positive + hunting value (W _uuh , If W _luh ) or (-) Hunting values (W _ulh , W _llh ) are not released, proceed to step S116 to proceed with step _Z116 for the upper wheel Z servo motor 161 or roller Z servo motor 165 and the lower wheel Z servo motor. 161a is vertically corrected as described above.

In step S118, it is determined whether scribing of the corresponding sequence is completed. If not, the process returns to step S108. If the process is completed, the process proceeds to step S120. In step S122, it is determined whether or not the value of the scribing number counter Cs has reached the predetermined reference number n.

As a result of the determination in step S122, if the value of the scribing count counter Cs does not reach the reference number n, the process returns to step S104. , 163a, 167 generates a log file that records the detected load value and transmits to the host PC. Of course, the sensing load values of each of the load cells 163, 163a, and 167 may be transmitted to the upper PC in real time during the scribing operation.

The load cell board of the LCD panel cutting device of the present invention and the scribing control method through the same are not limited to the above-described embodiments and can be modified in various ways within the scope of the technical idea of the present invention.

As described above, according to the load cell board and the scribing control method of the LCD panel cutting apparatus according to the present invention, the wheel for cutting the bonded substrate in the scribing operation of forming a groove in the substrate in the large-sized TFT-LCD panel cutting apparatus In addition, the reliability of the product can be improved by quickly and precisely controlling the driving of the wheel or roller in the vertical direction based on the load value input from the load cell sensing the load applied to the roller. In addition, the log transmitted from the load cell board The file can be monitored in real time at any time to determine the adequacy of the current scribing conditions or the load value by distance.

Claims (5)

A plurality of predetermined heights are provided on the front side of the body frame 110 in which the guide rails 114 are provided at both sides in the longitudinal direction, and hold one end of the bonded substrate 10 made of the TFT substrate 10u and the CF substrate 10l. Chuck unit 120 to be fixed, the movable base 130, 130a is provided with two at a predetermined interval to the front and rear to be slidable back and forth on the guide rail 110 of the body frame 110, the movable front and rear 130 , The movable base driving linear motors 140 and 140a for moving the front and rear 130a, the conveyors 150 and 150a installed above the movable bases 130 and 130a and installed so as to be rotated back and forth by a driving motor. Upper and lower wheel assemblies 160 and 160a provided with upper and lower wheel units, which are installed in the transverse direction at the top and bottom of the front end of the rear moving table 130a to form grooves on the upper and lower surfaces of the bonded substrate 10. ) And the upper and lower wheel assemblies (160, 160a) In the LCD panel cutting device 100 made of a configuration including a wheel assembly driving linear motor (170, 170a) for linear movement in the direction, An upper wheel 164 constituting the upper wheel assembly 160 and an upper roller 168 and a lower wheel constituting the lower wheel assembly 160a for forming grooves on one or both surfaces of the bonded substrate 10. The Z servo motor 161 for the upper wheel, the Z servo motor 165 for the roller, and the lower wheel assembly 160a for constituting the upper wheel assembly 160 for generating rotational power for raising and lowering 164a in the vertical direction, respectively. Z servo motor (161a) for the lower wheel constituting the; The upper wheel Z servo motor 161 constituting the upper wheel assembly 160, the roller Z servo motor 165 and the lower wheel Z servo motor 161 a constituting the lower wheel assembly 160a are respectively driven. An upper wheel Z servo driver 330, a roller Z servo driver 350, and a lower wheel Z servo driver 340; Load values applied to the cemented substrate 10 by the upper wheel 161 or the upper roller 168 constituting the upper wheel assembly 160 and the lower wheel 161a constituting the lower wheel assembly 160a, respectively. A load cell circuit unit 354 including a load cell 167 for sensing; Driving the upper wheel Z servo motor 161 constituting the upper wheel assembly 160, the Z servo motor 165 for the roller, and the lower wheel Z servo motor 161 a constituting the lower wheel assembly 160a. I / O in charge of the input / output interface between the upper wheel Z servo motor pulse signal and the roller Z servo motor pulse signal and the lower wheel Z servo motor pulse signal Interface 320; And The upper wheel Z servo driver 330 by the pulse signal for the upper wheel Z servo motor, the pulse signal for the roller Z servo motor, and the pulse signal for the lower wheel Z servo motor inputted through the I / O interface 320. The upper wheel 161 is controlled according to a result of controlling the roller Z servo drive unit 350 and the lower wheel Z servo drive unit 340, and comparing each actual load value detected by the load cell 167 with a preset reference load value. ) Or the Z servo motor 161 for the upper wheel and the Z servo motor 165 for the roller and the Z servo motor 161 for the lower wheel for correcting the vertical position of the upper roller 168 and the lower wheel 161 a. Load cell board of the LCD panel cutting device comprising a microcontroller 310 to perform the reverse control. The load cell board of claim 1, wherein the load cell board of the LCD panel cutting device communicates with a host PC through a USB to collectively control the overall operation of the LCD panel cutting device. In the scribing operation for cutting the bonded substrate 10 formed of the TFT substrate 10u and the CF substrate 10l, both sides of the bonded substrate 10 or the fused substrate 10 in the scribing operation for forming the TAB. The upper wheel 164 and the upper roller 168 and the lower wheel 164a, which form a groove on one surface of the CF substrate 10l), and the upper wheel 164 and the upper roller 168 and the lower wheel 164a. The upper wheel 164 and the upper roller 168 to which the lifting means for elevating in the vertical direction and the upper wheel 164, the upper roller 168, and the lower wheel 164a are applied to the cemented substrate 10, respectively. And it is carried out by the load cell board having a load cell for sensing the load value of each of the lower wheel (164a), (a) initiating a scribing operation for cutting and forming a TAP groove; (b) receiving a real load value detected by the load cell in real time in the scribing operation; (c) determining whether the actual load is out of a preset operating stability range; (d) If the actual load value does not deviate from the preset operating stability range as a result of the determination in step (c), the upper wheel or the upper roller and the lower wheel are kept in the current state, and in case of departure, the compensation is compensated. Controlling the elevating means to a preset value to perform vertical position correction of the upper wheel or the upper roller and the lower wheel; (e) setting the actual load value outside the operating stability range and comparing it with a positive hunting value and a negative hunting value indicating a maximum allowable load value and a minimum allowable load value, respectively; (f) stopping the scribing operation when the actual load value deviates from the positive and negative hunting values; And (g) scribing through the load cell board of the LCD panel cutting device comprising the step of transmitting a log file containing the detected actual load data to a higher level PC which collectively controls the overall operation of the LCD panel cutting device. Control method. delete delete

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