KR100806249B1 - Manufacturing method of display panel - Google Patents

Abstract

A method for manufacturing a display panel is provided to configure all devices used for the method in an inline type, thereby reducing manufacturing time of the display panel, quickly moving the display panel, exactly performing the method, and minimizing defects. A method for manufacturing a display panel comprises the following steps of: cleaning the display panel(301); attaching a polarizer to upper and lower surfaces of the display panel carried out through the above step(302); attaching a TAB to the display panel carried out through the above step(303); attaching a PCB(Printed Circuit Board) to the display panel carried out through the above step(304); and assembling and aging the display panel carried out through the above step(305,306). The method further comprises a step of cutting a protection film of the upper part of the polarizer(701). The polarizer protection film cutting step is performed in an inline type so that continuous processes may be possible according to each step, and selectively added between the steps.

Description

Manufacturing method of display panel

1A is a perspective view showing an apparatus for manufacturing a display panel according to the present invention.

1B is a front view showing an apparatus for manufacturing a display panel according to the present invention.

1C is a side view showing an apparatus for manufacturing a display panel according to the present invention.

2, 3, 4, 5, and 6 are block diagrams showing FIGS. 1A-1C of the present invention according to the arrangement of each process.

Figures 7a to 7d is a view showing that the upper protective film of the display panel is cut by Figs. 1a to 1c of the present invention.

<Description of the symbols for the main parts of the drawings>

301: cleaning 302: polarizing plate attached

303: tab attachment 304: PCB attachment

305: Assembly 306: Aging

501: Table 502: Vision monitoring unit

503: laser head 701: polarizing plate protective film cutting

801: Display Panel

The present invention relates to a method of manufacturing a display panel for completing a liquid crystal display device, and more particularly, to a display panel including a polarizer protective film cutting step during the manufacturing process of the display panel and manufacturing the display panel in-lined thereof. It is about a method.

In general, as much attention has been paid to the increase in size and quality of display devices as a medium for transmitting image information, it is noted that various flat panel display devices have been developed and disseminated in place of CRT (Cathode Ray Tube), which has been used until now. same. One of the flat panel display devices, the liquid crystal display device has developed far beyond the CRT in terms of image quality and color, and has become a main product dominating the world market.

The general manufacturing process of the general TFT-LCD panel (Thin Film Transistor Liquid Crystal Display Panel) 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 TFT (Thin Film Transistor) that fits in it is smaller. Furthermore, to reach a resolution of 1600 x 1200, the number of pixels is 1.19 million, which requires 3 times (R, G, B), considering each sub-pixel, and requires 576 million TFTs. Therefore, a semiconductor level process is required as a process that requires high precision of the entire process itself.

Meanwhile, the manufacturing process of the TFT-LCD panel as described above is largely divided into a TFT process, a color filter (CF) process, a cell process, and a display panel process. One panel is made through a cell process, and a panel processed through a cell process is a display panel process, and a TFT-LCD panel that is actually used for a monitor or a TV is made.

First, the TFT (Thin Film Transistor) process is a process of forming a basic electrode, which makes the electrode of each cell 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. A similar pattern process is 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. Such pattern processes include deposition, cleaning, photo resist coating (PR) coating, exposure, development, etching,

It is made in the order of PR stripping (strip process) and inspection, and 5 or more processes are required only in the TFT process.

TFT-LCD, on the other hand, does not emit light on its own 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. As 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. These CFs

It is located on the top of the TFT-LCD panel and is made through a process separate from the TFT process. In the CF process, the pattern process described above is required.

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 without the need for the deposition and cleaning process, by applying a color-sensitive photosensitive material to the process of exposure and development) and the ITO process (Indium 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.).

In addition, 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, polyamide printing, rubbing process, spacer scattering, and bonding. (TFT substrate and CF substrate are precisely bonded), cutting (the bonded substrate is cut and separated into respective panels), liquid crystal injection, and final inspection.

The display panel process of the above-described TFT-LCD panel 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. ) Attachment, TAB attachment, Autoclave, PCB attachment, BLU (Back Light Unit) assembly, and inspection.

In the aforementioned display panel fixing, the polarizers attached to the upper and lower parts of the panel have a function of making the incident light vibrate in various directions to be light that vibrates only in one direction (that is, polarization). Polarizers are usually attached at a cross angle of 90 degrees.

In this case, a protective film for protecting the polarizing plate is attached to each of the upper and lower surfaces of the polarizing plate, but in order to attach the polarizing plate to the upper and lower surfaces of the polarizing plate, the protective film on the upper and lower surfaces of the polarizing plate is first removed, It should be attached to the lower surface.

Meanwhile, the polarizing plate protective film removing device according to the related art uses a plurality of rollers to attach a plurality of tapes in a length direction on the upper surface of the protective film attached to the upper and lower surfaces of the polarizing plate, and then grasps the ends of the tapes. When the distal end of the polarizing plate protective film is peeled off from the polarizing plate tip by moving, the tape is moved to the rear side while the protective film is separated from the polarizing plate.

However, the polarizing plate protective film removing device according to the prior art has a problem that the polarizing plate protective film removing device occupies a large space since the protective film is formed by attaching and removing the tape in the longitudinal direction before and after removing the protective film from the polarizing plate. have.

In addition, in the case of the polarizer protection film removal apparatus according to the prior art, because the structure using a plurality of rollers, there is a need to replace the roller due to the large replacement demand, and the length of the tape attached to the polarizer protection film before and after There is a problem that the consumption of the tape is very large because it must be attached in multiple directions. Therefore, there is a problem that the maintenance and repair of the equipment is difficult due to the problem of replacing the roller and the problem that the consumption of the tape is very large.

Another problem of the polarizing plate protective film removing apparatus according to the prior art as described above is that when the protective film is removed from the polarizing plate, a wider area of the tip of the protective film is peeled off from the tip of the polarizing plate. there is a problem.

Another problem of the polarizing plate protective film removing device according to the prior art as described above is that sometimes the problem that must be adjusted because it does not correspond to the polarizing plate of any size.

In addition, the polarizing plate protective film removing device according to the prior art as described above has a problem that foreign matter occurs in the polarizing plate because a large number of rollers are used to remove the protective film from the polarizing plate.

Therefore, the present invention has been proposed for the purpose of solving the above problems, and provides a method for manufacturing a display panel, which can cut the protective film without damaging the polarizing plate.

Still another object of the present invention is a method of manufacturing a display panel comprising a cleaning step, a polarizing plate attaching step, a tab attaching step, a PCB attaching step, an assembly step, and an aging step. Provided is a method of manufacturing a display panel characterized in that it is inlined.

Another object of the present invention requires a manual process of attaching a separate protective film after removing the protective film of the upper polarizing plate attached in the manufacturing process of the display panel, the present invention uses the protective film of the polarizing plate as it is and display The present invention provides a method for manufacturing a display panel, which comprises cutting and removing only necessary portions of the panel manufacturing process.

According to an aspect of the present invention, there is provided a method of manufacturing a display panel, including: a cleaning step of washing a display panel; and attaching polarizing plates to upper and lower surfaces of the panel carried out through the cleaning step. A polarizing plate attaching step; and a tab attaching step of attaching a tab (TAB) to the panel exported through the polarizing plate attaching step; and, a PCB attaching step of attaching a PCB to the panel exported through the attaching tab step; and, Assembling the panel exported through the PCB attachment step; And an aging step. The display panel manufacturing method comprising: a polarizing plate protective film cutting step for cutting the protective film on the polarizing plate in the above step.

In addition, the polarizing plate protective film cutting step is characterized in that it is added in-line (in-line) to enable a continuous process according to each step selectively added between each step.

At this time, the assembly step is characterized in that the in-line inserting the polarizing plate protective film cutting step.

In the cutting of the polarizing plate protective film, the panel acquired in the previous process is mounted on a table for supporting the same, and the laser head is moved to a predetermined space of the protective film which is the start point of cutting to measure the thickness of the protective film. A first step; A second step of recognizing the thickness of the protective film measured in the first step as the irradiation depth of the laser beam and cutting the film to a predetermined depth; A third step of monitoring the panel and the protective film as a 3D image by moving the vision monitoring unit according to the movement of the table during the cutting of the second step; A fourth step of stopping irradiation of a laser beam at an end point of the cutting operation; And a fifth step of recognizing the cutting end vertex of the fourth step as a position to be taken over by a later process.

At this time, the laser head of the first step is characterized by receiving the data value of the depth and width of the initial laser beam by a connected keypad or PC.

In addition, the cutting of the second step may be performed by sequentially cutting or partial cutting by adjusting ON / OFF of the laser beam irradiation.

In addition, the cut start and end vertices are characterized in that the same peak for cutting only the inside of the protective film or different peaks for cutting only a portion of the protective film.

In addition, in the first step, the table may be moved to allow the display panel that has completed the previous process to be taken over and to take over the display panel that has completed the first to fifth steps in a later process. It features.

Hereinafter, with reference to the accompanying Figures 3 to 13 will be described in detail a preferred embodiment of the present invention.

Figure 1a is a perspective view showing a manufacturing apparatus of a display panel according to the present invention, Figure 1b is a front view showing a manufacturing apparatus of a display panel according to the present invention, Figure 1c is a side view showing a manufacturing apparatus of a display panel according to the present invention. 2, 3, 4, 5, and 6 are block diagrams showing FIGS. 1A to 1C of the present invention according to the arrangement of each process, and FIGS. 7A to 7D are top protections of the display panel by FIGS. 1A to 1C of the present invention. It is a figure which shows that the film was cut out.

As shown in FIGS. 1A to 1C, the apparatus for manufacturing a display panel of the present invention includes a table 501, a vision monitoring unit 502, and a laser head 503 as a core configuration, and the laser head 503. The keypad or PC (not shown) for inputting the depth and width data values of the laser beam oscillating at is detachably installed.

The laser head 503 deflects the laser beam to maintain a constant irradiation distance when passing through the vertex adjacent to the protective film. In this case, the laser head 503 deflects the laser beam and maintains a constant irradiation distance when passing through the apex adjacent to the protective film on the upper portion of the display panel or the polarizing plate. In addition, the laser head 503 and the vision monitoring unit 502 can be moved by the X, Y transfer robot.

Here, the vision monitoring unit 502 checks whether the laser head and the laser beam are irradiated and cut only on the protective film, or whether the laser beam is transmitted through the display panel and not the protective film, thereby causing damage to the user. send.

In addition, the table 501 moves by fixing the display panel from the previous process to the subsequent process. In this case, the table 501 is preferably configured to be rotated 360 degrees if necessary by mounting a display panel.

As shown in FIG. 2, the present invention provides a cleaning 301, a polarizing plate attaching 302, a tab attaching 303, a PCB attaching 304, an Assembly 305, and an aging 306. In the manufacturing process of the conventional display panel is configured, the polarizing plate protective film cutting step further comprises.

The cutting unit for the cutting step may include a laser head, a vision monitoring unit, and a table in-line that enables continuous production of the display panel before or after the cleaning unit for cleaning the display panel. Includes ..

Herein, the display panel refers to a screen portion of a flat panel display such as an LCD and a PDP, and may be referred to as a polarizer according to a manufacturing step of the display panel.

As shown in FIG. 3, the present invention includes a cleaning 301 step, a polarizer attaching step 302, a tab attaching step 303, a PCB attaching step 304, an assembly 305 step, and an aging step 306 step. In the manufacturing process of the conventional display panel is configured, the laser head in-line (in-line) to enable continuous production of the display panel in the post-process of the polarizing plate attaching step 302 of attaching the polarizing plate above and below the display panel and Adding a polarizing plate protective film cutting step 701 including a vision monitoring unit and a table.

As shown in FIG. 4, the present invention provides the cleaning (301), polarizer attachment (302), tab attachment (303), PCB attachment (304), Assembly (305), and Aging (306) steps. In the manufacturing process of the conventional display panel consisting of, the continuous production of the display panel is possible in the post-process of the step of attaching the tab (303) to attach the tab (TAB) to the display panel carried out through the polarizing plate attaching step (302) In addition, a polarizing plate protective film cutting step 701 including an in-line laser head and a vision monitoring unit and a table is added.

As shown in FIG. 5, the present invention includes a cleaning 301 step, a polarizing plate attaching step 302, a tab attaching step 303, a PCB attaching step 304, an assembly 305 step, and an aging step 306 step. In the manufacturing process of the conventional display panel is configured, the in-line (in series) to enable the continuous production of the display panel in the post-process of the PCB attachment step 304 to attach the PCB to the display panel taken out through the tab attachment (303) step A polarizing plate protective film cutting step 701 including a lined laser head, a vision monitoring unit and a table is added.

As shown in FIG. 6, the present invention includes a cleaning 301, a polarizing plate attaching 302, a tab attaching 303, a PCB attaching 304, an Assembly 305, and an aging 306. In the manufacturing process of the conventional display panel is configured, the polarizing plate protective film cutting step including a laser head, a vision monitoring unit and a table in the Assembly (305) step is inserted therein.

Here, the laser head is irradiated with a laser beam to maintain a constant irradiation distance when passing through the vertex adjacent to the protective film.

At this time, the vision monitoring unit displays whether the laser beam is irradiated and cut only on the protective film or vision transmission whether the laser beam is transmitted through the polarizer rather than the protective film and damaged the display so that the user can see it. do.

Here, the table includes a table that moves by fixing the display panel from the previous process to the subsequent process.

Meanwhile, the apparatus for manufacturing a display panel of the present invention includes a cleaning 301 step, a polarizing plate attaching step 302, a tab attaching step 303, a PCB attaching step 304, an assembly 305 step, and an aging step 306 step. In the manufacturing process of a conventional display panel configured, before the display panel is put into the cleaning step 301, a polarizing plate protective film cutting step 701 including a laser head, a vision monitoring unit and a table is added to cut the protective film. You may.

7a to 7d are views showing that the upper protective film of the display panel of the present invention is cut off.

FIG. 7A illustrates the upper protective film 602 of the display panel 801 sequentially cut, and the start and end vertices 601 and 604 of the cut line 603 are the same. At this time, the laser beam irradiation is continuously turned on (ON) and irradiated until the end after the start of cutting.

FIG. 7B shows the upper protective film 602 of the display panel 801 sequentially cut, and the start and end vertices 601 and 604 of the cut line 603 are the same. The on / off of the laser beam is periodically varied from the beginning of the cut to the end of the laser beam irradiation. At this time, the perforation line 603 is formed in a straight line is a partial cut.

7C shows the upper protective film 602 of the display panel 801 sequentially cut, and the start and end vertices 601 and 604 of the cut line 603 are different from each other. At this time, the laser beam irradiation is continuously turned on (ON) and irradiated until the end after the start of cutting.

FIG. 7D illustrates the upper protective film 602 of the display panel 801 sequentially cut, and the start and end vertices 601 and 604 of the cut line 603 are different from each other. The on / off of the laser beam is periodically varied from the beginning of the cut to the end of the laser beam irradiation. At this time, the perforation line 603 is formed in a straight line is a partial cut.

Hereinafter, the operation method of the present invention will be described in detail.

Method of manufacturing a display panel according to a feature of the present invention, the post-process of attaching the protective film 801 for protecting the polarizing plate manufactured by the polarizing plate manufacturer or the flow of the process of producing the display panel 801 by receiving the polarizing plate In order to smoothly and to omit the process of attaching the protective film in the display panel 801 production company, the worker and the loading rack, the tape cutting process and the appearance inspection process in the process.

First, the display panel 801 acquired in the previous process is mounted on the table to move the laser head 503 to a predetermined space of the protective film 602, which is the cut start vertex 601, of the protective film 602. Measure the thickness simultaneously.

At this time, the laser head 503 receives the data values of the depth and width of the initial laser beam by a connected keypad or PC. The data of the input is for recognizing the size of the display panel 801, irradiating and terminating the laser beam at a predetermined position of the display panel 801, and the thickness of a commercially available protective film.

Subsequently, the measured thickness of the protective film 602 is recognized as the depth of irradiation of the laser beam and cut to a predetermined depth.

Subsequently, the laser head 503 for irradiating a laser beam to the protective film 602 attached to the upper portion of the display panel 801 and the table 501 for supporting the display panel 801 are moved relative to each other. 602).

Subsequently, the cutting unit 502 moves in accordance with the movement of the table 501 to monitor the display panel 801 and the protective film 602 as a 3D image.

The laser head 503 then stops irradiating the laser beam at the end vertex 604 of the cut.

Finally, the end vertex 604 of the cut is recognized as a position to be taken over in a later process, and the display panel 801 is taken over. At this time, the table 501 is adjacent to the application part (not shown) of the later process. In addition, the table 501 is provided with a motor (not shown) to enable the transfer of the display panel 801 to the pre-process and the post-process.

As described above, the present invention significantly reduces the space, labor cost, and manufacturing time of the display panel by eliminating unnecessary processes.

Preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and various substitutions, modifications, and changes within the scope without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It will be possible, but such substitutions, changes and the like should be regarded as belonging to the following claims.

As described above, by configuring all the devices used in the manufacturing method of the display panel according to the present invention in-line type, it is possible to reduce the manufacturing time of the display panel, the movement of the display panel is fast and can proceed accurately, thereby minimizing the defective rate There is an advantage to being there.

In addition, the present invention can minimize the space occupied by the device used when the manufacturing process is formed according to the manufacturing method of the display panel, there is an effect that can maximize the space efficiency.

In addition, the present invention has the effect of reducing the manufacturing cost by the simplification of the manufacturing process due to the simplification of the removal process of the pre-attached polarizing plate protective film and the deletion of the process of attaching a new protective film.

Claims (8)

Cleaning step for cleaning the display panel; And, A polarizing plate attaching step of attaching polarizing plates to upper and lower surfaces of the display panel carried out through the cleaning step; A tab attaching step of attaching a tab (TAB) to the display panel carried out through the polarizing plate attaching step; PCB attachment step of attaching the PCB to the display panel taken out through the tab attachment step; And, Assembling the display panel carried out through the PCB attachment step; In the manufacturing method of the display display panel comprising; The method of manufacturing a display panel further comprising the step of cutting a polarizing plate protective film for cutting the protective film on the upper polarizing plate in the step. The method of claim 1, The polarizing plate protective film cutting step may be added in-line (in-line) to enable a continuous process according to each step to selectively add between each step. The method of claim 1, The assembly step is a method of manufacturing a display panel, characterized in that the in-line inserting the polarizing plate protective film cutting step. The method according to any one of claims 1 to 3, The polarizing plate protective film cutting step, A first step of mounting the display panel acquired in the previous process on a table for supporting the same, and moving a laser head to a predetermined space of the protective film which is the start point of cutting to measure a thickness of the protective film; A second step of recognizing the thickness of the protective film measured in the first step as the irradiation depth of the laser beam and cutting the film to a predetermined depth; A third step of monitoring the display panel and the protective film as a 3D image by moving the vision monitoring unit according to the movement of the table during the cutting of the second step; A fourth step of stopping irradiation of a laser beam at an end point of the cutting operation; And And a fifth step of recognizing the cut end vertex of the fourth step as a position to be taken over in a later process. The method of claim 4, wherein And the laser head of the first step receives data values of the depth and width of the initial laser beam by a connected keypad or PC. The method of claim 4, wherein The cutting of the second step is a method of manufacturing a display panel, characterized in that by cutting the laser beam irradiation on / off (ON / OFF) to sequentially cut or partial cutting. The method of claim 4, wherein Wherein the cut start and end vertices are the same vertices for cutting only the inside of the protective film or different vertices for cutting only a portion of the protective film. The method of claim 4, wherein In the first step, the table is moved to receive the display panel after the previous step, and the display panel after the first step to the fifth step can be transferred to the subsequent step so that the table can be inlined. The manufacturing method of a display panel.

Images