JP2012027469A - Device and method for repairing liquid crystal display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for repairing a liquid crystal display panel that can more effectively repair a defect of an LCD panel.SOLUTION: A device for repairing a liquid crystal display panel includes: a laser beam device for removing a defective pattern of an LCD panel, a laser beam moving device for moving the laser beam device, a printing plate formed with a groove corresponding to a repair pattern of the defective pattern of the LCD panel, a base on which the LCD panel and the printing plate are placed, a printing unit that forms the repair pattern by filling the groove formed in the printing plate with ink and transfers the formed repair pattern to the LCD panel, a printing unit moving device for moving the printing unit, and a controller for performing control such that the laser beam device removes the defective pattern of the LCD panel and the printing unit forms the repair pattern and transfers it to the LCD panel.

Description

  The present invention relates to a liquid crystal display panel repair device and method, and more particularly, to a liquid crystal display panel repair device and method that can repair defects in a liquid crystal display panel.

  In general, a liquid crystal display panel (hereinafter referred to as an “LCD panel”) of a liquid crystal display device includes a lower substrate, an upper substrate, and a liquid crystal layer formed therebetween.

  The lower substrate is an array substrate on which thin film transistors (TFTs), which are individual switching elements, and pixel electrodes are formed. A thin film transistor (TFT) includes a gate electrode, an insulating film, a semiconductor layer, and source / drain electrodes.

  The upper substrate is a color filter substrate on which a color filter layer and a black matrix are formed.

  In an LCD panel having such a configuration, a liquid crystal layer formed between an upper substrate and a lower substrate drives liquid crystal molecules by a thin film transistor formed on the lower substrate, and controls the amount of light transmitted through the liquid crystal layer. To display information.

  The manufacturing process of the LCD panel mainly includes an array substrate forming process, a color filter substrate manufacturing process, a cell assembly process, a modularization process, and the like.

  The two substrates that have undergone the array forming process and the color filter array manufacturing process are converted into a single panel by the cell process, and the panel is subsequently converted into an actual LCD panel through a modularization process.

  A high yield is indispensable for reducing the cost of the LCD panel. However, as the panel becomes larger, the number of defects increases in proportion to the area, and a decrease in yield is inevitable.

  The array substrate of the LCD panel is connected with, for example, generation of foreign matter due to dust strongly appearing in a specific area, unevenness occurring in a wide area, scratching defect generated by an external stimulus, and a portion to be cut. Various defects appear, including short-circuit defects and open defects in which the parts to be connected are cut.

  The period of LCD panel generation change is very short. Therefore, a high yield cannot be obtained only by improving the production line.

  Therefore, for short defects, laser processing removal technology has been used to cut and repair the short parts, and for open defects, certain parts of the defective parts are cut with a laser and laser chemical vapor deposition is performed. The cut sites have been connected and repaired by depositing metal using (Chemical Vapor Deposition; CVD) technology.

  However, the method using such laser processing removal technology and laser CVD technology can be repaired not only for local areas but also for simple line pattern defects, and metal is deposited. It took a long time to do so, and the repair time was prolonged, so there was a limit to defect repair.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display panel repair device and method capable of repairing LCD panel defects more efficiently by repairing LCD panel pattern defects using an offset printing method. .

  In order to achieve the above object, a liquid crystal display panel repair device according to an embodiment of the present invention includes a laser beam device for removing a defective pattern of an LCD panel, and a laser beam moving device for moving the laser beam device. A printing plate in which a groove corresponding to a repair pattern of the defective pattern of the LCD panel is formed; a base on which the LCD panel and the printing plate are placed; and a groove formed in the printing plate is filled with ink The repair pattern is formed, a printing unit that transfers the formed repair pattern to the LCD panel, a printing unit moving device that moves the printing unit, and the laser beam device removes the defective pattern of the LCD panel. The printing unit forms the repair pattern and transfers it to the LCD panel. And a control unit for controlling so as to.

  The printing unit includes an ink supply unit that supplies ink to the grooves of the printing plate, a blade that removes ink remaining in the grooves of the printing plate from the upper surface of the printing plate, and the grooves are filled. And a transfer member that transfers the transferred ink pattern to the surface and transfers the transferred ink pattern to the LCD panel.

  The transfer member is in contact with the upper surface of the printing plate so as to transfer the ink pattern filled in the groove to the surface, and the LCD is configured to transfer the ink pattern transferred to the surface to the LCD panel. Includes a stamp that contacts the panel.

  The transfer member rotates and moves in contact with the upper surface of the printing plate so as to transfer the ink pattern filled in the groove to the surface, and transfers the ink pattern transferred to the surface to the LCD panel. A transfer roll that rotates and moves in contact with the LCD panel;

  The transfer roll includes a cylindrical roller and a blanket that wraps the roller.

  A liquid crystal display panel repair device according to another embodiment of the present invention includes a laser beam device for removing a defective pattern of an LCD panel, a laser beam moving device for moving the laser beam device, and the LCD panel. A base, a printing unit that forms a repair pattern of a defective pattern on the LCD panel, a transfer unit that transfers the formed repair pattern to the LCD panel, a printing unit moving device that moves the printing unit, and the laser beam device And a control device for removing the defective pattern of the LCD panel and controlling the printing unit to form the repair pattern and transfer it to the LCD panel.

  In addition, the printing unit includes a printing roll having a groove formed in the same form as the repair pattern on the surface thereof, rotating about a central axis as a rotation center, an ink supply unit that supplies ink to the surface of the printing roll, and the printing A blade that removes ink remaining in the groove of the roll from the surface of the printing roll, and rotates while contacting the surface of the printing roll, and the ink pattern filled in the groove of the printing roll is transferred to the surface. And a transfer roll for transferring the transferred ink pattern to the LCD panel.

  According to another aspect of the present invention, there is provided a method for repairing a liquid crystal display panel, wherein a defective pattern of an LCD panel is removed by a laser beam, and a groove having the same shape as the repair pattern of the removed defective pattern is formed. Filling the groove with ink, transferring the ink pattern filled in the groove of the printing plate onto the surface of the transfer member, and transferring the ink transferred onto the surface of the transfer member to the LCD panel. .

  In a preferred embodiment, in the step of transferring the ink to the surface of the transfer member, the transfer member uses a rotating roll or a stamp.

  As described above, according to the present invention, the defective pattern of the array substrate is removed by laser cutting, and the repair pattern is printed on the removed region using the offset printing method. Defects can also be repaired, and the yield of LCD panel manufacturing can be improved.

  Further, according to the present invention, since the offset printing technique is used instead of the CVD technique, the pattern formation time can be reduced, and the defect of the array substrate can be repaired at a higher speed.

It is sectional drawing which shows the structure of the LCD panel to which the Example of this invention is applied. It is a figure for demonstrating the structure of the 1st board | substrate of the LCD panel to which the Example of this invention is applied. It is a figure which shows the form of the gate pattern of the 1st board | substrate shown in FIG. It is a figure which shows the pattern form of the insulating film of the 1st board | substrate shown in FIG. It is a figure which shows the pattern form of the semiconductor layer of the 1st board | substrate shown in FIG. FIG. 3 is a diagram showing a pattern form of source / drain electrodes of the first substrate shown in FIG. 2. FIG. 6 is a diagram for explaining a process of repairing a first substrate of an LCD panel applied to an embodiment of the present invention. It is a figure which shows the shape of the printing plate which forms each repair pattern shown in FIG. It is a figure for demonstrating the process in which the repair pattern shown in FIG. 7 is formed using a gravure offset printing system. FIG. 8 is a diagram for explaining a process of forming the repair pattern shown in FIG. 7 using a reverse offset printing method. 1 is a cross-sectional view illustrating a structure of an LCD panel repair device according to an embodiment of the present invention. FIG. 5 is a view for explaining a process of transferring a repair pattern to a substrate by an LCD panel repair device according to an embodiment of the present invention. FIG. 5 is a view for explaining a process of transferring a repair pattern to a substrate by an LCD panel repair device according to an embodiment of the present invention. FIG. 5 is a view for explaining a process of transferring a repair pattern to a substrate by an LCD panel repair device according to an embodiment of the present invention. FIG. 5 is a view for explaining a process of transferring a repair pattern to a substrate by an LCD panel repair device according to an embodiment of the present invention. FIG. 5 is a view for explaining a process of transferring a repair pattern to a substrate by an LCD panel repair device according to an embodiment of the present invention. FIG. 6 is a cross-sectional view illustrating a structure of an LCD panel repair device according to another embodiment of the present invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view showing the structure of an LCD panel to which an embodiment of the present invention is applied. As shown in FIG. 1, the LCD panel includes a first substrate 10, a second substrate 30, and a liquid crystal layer 20. The first substrate 10 and the second substrate 30 are disposed to face each other with the liquid crystal layer 20 interposed therebetween.

  The first substrate 10 includes a plurality of signal lines and a pixel portion electrically connected to these signal lines.

  The second substrate 30 is disposed to face the first substrate 10. The second substrate 30 is formed on the entire surface of the substrate and includes a common electrode 35 made of a transparent conductive material.

  Usually, the first substrate 10 is called an array substrate, and the second substrate 30 is called a color filter substrate.

  The liquid crystal layer 20 is interposed between the first substrate 10 and the second substrate 30. The arrangement of the liquid crystal layer 20 changes depending on the electric field generated between the pixel portion and the common electrode 35. When the arrangement of the liquid crystal layer 20 is changed, the light transmittance of the liquid crystal layer 20 is changed, whereby an image can be displayed outside.

  The first substrate 10 is formed at the intersection of a transparent first base substrate 11 made of glass or the like, and a plurality of gate lines and data lines arranged in a matrix form vertically and horizontally on the upper surface of the first base substrate 11. And a pixel electrode 17 corresponding to the pixel portion connected to the thin film transistor TFT.

  The pixel electrode 17 serves as an electrode on the other side that receives a signal from the thin film transistor TFT and applies a voltage to the liquid crystal of the liquid crystal layer 20. Here, a portion where the pixel electrode 17 is formed is referred to as a pixel portion.

  The thin film transistor TFT includes a gate electrode 12 branched from the gate line, an insulating film 13 formed on the entire surface of the first base substrate 11 between the gate line and the data line for insulation between the gate line and the data line, an electron or a hole ( a semiconductor layer 14 made of a semiconductor material which is a carrier movement path such as a hole, a source electrode 15 a branched from the data line, and a drain electrode 15 b connected to the pixel electrode 17.

  Here, reference numeral 16 is a protective film formed on the entire surface of the substrate above the thin film transistor TFT in order to protect the thin film transistor TFT. Reference numeral 18 is a storage electrode that constitutes a storage capacitor. The storage capacitor plays a role of stably maintaining the pixel signal charged in the pixel electrode 17 until the next pixel signal is charged. The storage electrode 18 is formed of the same metal as the gate electrode 12.

  The second substrate 30 includes a transparent second base substrate 31, a black matrix 32 formed in order on the lower surface of the second base substrate 31, a color filter layer 33 including red, green, and blue color filters, an overcoat A layer 34 and a common electrode 35 are included.

  The black matrix 32 shields the non-image areas such as the gate lines and the data lines and the thin film transistors TFT in the first substrate 10, thereby displaying an image area in which an image actually viewed by the user is displayed due to an arrangement change of liquid crystal molecules, A portion corresponding to the pixel electrode 17 is exposed.

  The color filter layer 33 includes red, green, and blue color filters that are repeatedly arranged so as to reflect light in a specific wavelength band in a state corresponding to each pixel portion of the array substrate.

  The common electrode 35 is made of a transparent conductive metal. The common electrode 35 serves as one electrode for applying a voltage to the liquid crystal filled in the liquid crystal layer 20.

  Since the first substrate 10 and the second substrate 30 are arranged so that the respective pixel electrodes 17 and the common electrode 35 face each other with the liquid crystal layer 20 interposed therebetween, a seal pattern (seal) is provided on the periphery of both the substrates 10 and 30. pattern) is formed, thereby preventing a cell gap for liquid crystal injection, bonding of both substrates, and liquid crystal leakage.

  On the other hand, for reliable image expression, the gap between the first and second substrates 10 and 30, that is, the cell gap defined by the thickness of the liquid crystal layer 20 must be maintained constant. For this purpose, a spacer 21 is formed between the two substrates.

  Here, the first alignment film 19 and the second alignment film 36 are respectively formed on the inner surfaces of the first substrate 10 and the second substrate 30, and the initial alignment direction of the liquid crystal layer 20 is adjusted by the alignment films 19 and 36. It is determined.

  Hereinafter, repairing the first substrate of the LCD panel will be described.

  FIG. 2 is a diagram illustrating the structure of the first substrate of the LCD panel to which the embodiment of the present invention is applied. FIG. 3 to FIG. 6 are views showing forms of a gate pattern, an insulating film pattern, a semiconductor layer pattern, and a source / drain electrode pattern constituting the first substrate shown in FIG.

  FIG. 7 is a diagram illustrating a process of repairing the first substrate of the LCD panel applied to the embodiment of the present invention. As shown in FIG. 7, when a defect occurs in the first substrate 10 (see FIG. 7A), a predetermined region K including the defect occurrence region Q in the first substrate 10 is removed using a laser beam. (Refer to FIG. 7B). In this case, as shown in FIG. 7B, the first base substrate on the predetermined region K is exposed such that the first base substrate 11 which is the lowermost layer of the first substrate 10 is exposed in the predetermined region K. The gate pattern, insulating film pattern and source / drain electrode pattern covering 11 are removed.

  After the predetermined area K is removed, the gate pattern of the removed gate pattern is formed in the removed area by an offset printing method in which a repair pattern is formed using the respective printing plates 100a, 100b, and 100c as shown in FIG. The first substrate is repaired by sequentially patterning the repair pattern R1, the repair pattern R2 of the removed insulating film pattern, and the repair pattern R3 of the removed source / drain electrode pattern.

  That is, the repair pattern R1 of the removed gate pattern is patterned on the first base substrate 11 from which the predetermined region K has been removed by using an offset printing method (see FIG. 7C).

  After patterning the repair pattern R1, the repair pattern R2 of the removed insulating film pattern, which is the upper layer, is patterned using an offset printing method (see FIG. 7D).

  After patterning the repair pattern R2, the repair pattern R3 of the removed source / drain electrode pattern, which is an upper layer thereof, is patterned using an offset printing method (see FIG. 7E).

  As a result, the defective area of the first substrate 10 can be repaired as a normal area.

  FIG. 8 is a diagram showing the shape of a printing plate for forming each repair pattern R1, R2, R3 shown in FIG. As shown in FIG. 8, a first repair pattern groove r1 corresponding to the repair pattern R1 of the removed gate pattern is formed in the first printing plate 100a. Further, a second repair pattern groove r2 corresponding to the repair pattern R2 of the removed insulating film pattern is formed in the second printing plate 100b. The second printing plate 100c is provided with a third repair pattern groove r3 corresponding to the repair pattern R3 of the removed source / drain electrode pattern. The process of patterning the repair pattern using each of the printing plates 100a, 100b, and 100c will be described later.

  The offset printing method is a method in which a printing plate is not directly printed on a printing material, but is temporarily transferred to a rubber blanket serving as a mediator and then printed on the printing material.

  The offset printing method includes a gravure offset (Gravure Offset) or a reverse offset (Reverse Offset) printing method. A gravure offset or reverse offset printing method may be selected in accordance with material characteristics (for example, viscosity).

  FIG. 9 is a diagram illustrating a process of forming the repair pattern illustrated in FIG. 7 using a gravure offset printing method. As shown in FIG. 9, in the gravure offset printing method, a repair pattern is formed using a printing plate (for example, cliche) 100 in which a concave groove 101 that is a concave pattern is engraved. First, after filling the surface of the printing plate 100 with ink, the surface of the printing plate 100 is flattened by using a doctor blade 120 so that the ink 110 is filled only in the groove 101 of the printing plate 100 and the groove 101 is filled. After the transferred ink 110 is transferred to the transfer member 130, the ink 110 transferred to the transfer member 130 is transferred to a desired position on the substrate 140, thereby forming a repair pattern on the substrate 140. Here, the transfer member 130 may be a blanket stamp or a blanket roll.

  The process of forming the repair pattern using the gravure offset printing method will be described in more detail. First, in the concave groove 101 of the printing plate 100 in which the concave groove 101 corresponding to the repair pattern to be formed on the substrate 140 is engraved. Is filled with ink 110.

  When the ink is filled in the concave groove 101 of the printing plate 100, after applying the pattern forming ink 110 on the printing plate 100, the doctor blade 120 moves while being in contact with the printing plate 100. The ink 110 is filled in the concave groove 101 by the progress, and at the same time, the ink 110 remaining on the surface of the printing plate 100 is removed (see FIG. 9A).

  The ink 110 filled in the concave groove 101 of the printing plate 100 is transferred to the surface of the transfer member 130 that contacts the surface of the printing plate 100 (see FIGS. 9B and 9C). In this case, the transfer member 130 is formed with the same width as that of the repair pattern of the display element to be manufactured, and has the same length as the length of the repair pattern. Accordingly, the ink 110 filled in the concave groove 101 of the printing plate 100 is entirely transferred onto the surface of the transfer member 130 by one transfer.

  Thereafter, the transfer member 130 on which the ink 110 is transferred is brought into contact with a desired position on the substrate 140, whereby the ink 110 transferred to the transfer member 130 is transferred to the substrate 140 (FIG. 9). (See (D)). Thereby, a repair pattern is formed on the substrate 140.

  As described above, the printing plate 100 and the transfer member 130 can be manufactured according to the size of the repair pattern of a desired display element, and the repair pattern can be formed on the substrate 140 by one transfer. This pattern can also be formed in a single step.

  In the above gravure offset printing method, an example in which a repair pattern is formed on the substrate 140 has been described, but the present invention is not limited to this. That is, instead of the substrate 140, a repair pattern is formed on a layer to be processed (eg, a thin film transistor (TFT) gate electrode, insulating film, source / drain electrode, gate line, data line, or pixel electrode) formed on the substrate 140. It can also be formed.

  FIG. 10 is a diagram showing a process of forming the repair pattern shown in FIG. 7 using the reverse offset printing method.

  As shown in FIG. 10, after the transfer member 130 on the glass plate 150 is coated with the ink 110, the unnecessary ink portion is removed using the printing plate 100 in which the concave groove 101 is formed in the opposite shape of the repair pattern. Similarly, a repair pattern is formed on the substrate 140 by transferring it to a desired position on the substrate 140.

  Hereinafter, an LCD panel repair device according to an embodiment of the present invention will be described. Here, for convenience of explanation, the case of repairing the substrate of the LCD panel will be described as an example.

  FIG. 11 is a diagram illustrating a structure of an LCD panel repair device according to an embodiment of the present invention. As shown in FIG. 11, the LCD panel repair device according to the embodiment of the present invention has a substrate surface plate 220 on which the substrate 222 of the LCD panel is placed, and grooves having the same form as the repair pattern of the defective pattern of the substrate 222. The base 200 provided with the printing plate surface plate 210 on which the formed printing plate 212 is placed, the printing unit 230 that prints the repair pattern of the removed defective pattern on the substrate 222, and the printing unit 230, a printing unit moving device 240 for moving 230, a laser beam device 250 for removing defective patterns on the substrate 222, a laser beam moving device 260 for moving the laser beam device 250 to a desired position, and general control And a control device 270 for performing.

  The control apparatus 270 controls the laser beam apparatus 250 to remove the defective pattern on the substrate 222 after the laser beam moving apparatus 260 moves the laser beam moving apparatus 250 to the region where the defective pattern is generated on the substrate 222.

  Further, after removing the defective pattern on the substrate 222, the control device 270 moves the printing unit moving device 260 to the area where the printing plate 212 is located, and the printing unit 230 forms a repair pattern. The repair pattern thus formed is controlled to be transferred to the substrate 222. Thereby, the defective pattern of the substrate 222 is repaired. For example, the control device 270 controls the printing unit 230 to fill the groove 214 formed in the printing plate 212 with ink, and to transfer the filled ink pattern to the area where the defective pattern is removed on the substrate 222. By doing so, the defective pattern of the substrate 222 is repaired.

  An LCD panel repair device according to an embodiment of the present invention includes a video device such as a camera for confirming a specific position of a substrate or printing plate on a base, and an alignment device for aligning various devices. be able to.

  The printing plate surface plate 210 is a component on which a printing plate 212 on which a pattern of a specific shape is engraved is mounted. Therefore, it is preferable that the printing plate surface plate 210 further includes a printing plate fixing unit that fixes the mounted printing plate 212 so that it does not move during the process.

  The printing plate 212 mounted on the printing platen 210 is a plate-like component in which the shape of a specific pattern to be formed on the substrate 222 is engraved (see 100a to 100c in FIG. 8). This printing plate can be changed according to the progressed process, and when the same process is performed continuously, it is continuously used while being fixed on the printing platen.

  The substrate surface plate 220 is arranged side by side with the printing plate surface plate at a certain distance from the printing plate surface plate 210, and the substrate 222 is seated on the upper surface. Here, the height of the substrate surface plate 220 is set such that the height of the upper surface of the printing plate 212 mounted on the printing plate surface plate 210 and the height of the upper surface of the substrate 222 mounted on the substrate surface plate 220 are the same. It is preferable to adjust to.

  The substrate surface plate 220 and the printing plate surface plate 210 are fixed to the base 200 so that their positions do not change during the process.

  The substrate surface plate 220 and the printing plate surface plate 210 can be repositioned on the base 200 during the process preparation process, but are fixed so as not to move while the process is in progress when a specific position is determined.

  The printing unit 230 reciprocates on the upper side of the printing platen plate 220 and the upper side of the substrate platen 210, and plays a role of transferring the pattern formed on the printing plate 212 to the substrate 222.

  The printing unit 230 includes an ink supply unit 231, an ink filling blade 232, a residual ink removal blade 233, and a transfer roll 234.

  The ink supply unit 231 serves to supply a predetermined amount of ink I to the upper surface of the printing plate 212 mounted on the printing plate surface plate 210.

  The ink filling blade 232 fills the grooves 214 formed on the upper surface of the printing plate with the ink supplied onto the printing plate 212. For this purpose, the ink filling blade 232 has a plate-like shape having substantially the same length as the width of the printing plate 212. The ink filling blade 232 moves horizontally while being spaced apart from the upper surface of the printing plate 212 by a certain distance, and the ink supplied to the upper surface of the printing plate by the ink supply unit 231 has a certain thickness on the upper surface of the printing plate. Say goodbye. In this way, the ink is filled into the grooves 214 formed on the upper surface of the printing plate in the process of evenly distributing the ink to the upper surface of the printing plate.

  The residual ink removing blade 233 serves to remove the ink remaining in the grooves 214 from the upper surface of the printing plate 212. The residual ink removing blade 233 has a shape similar to that of the ink filling blade 232, but the installation position is different. That is, the ink filling blade 232 is installed in a state of being spaced apart from the upper surface of the printing plate 212 by a certain distance, but the residual ink removing blade 233 is installed in contact with the upper surface of the printing plate 212. Therefore, the remaining ink other than the ink filled in the groove 214 of the printing plate 212 can be removed from the upper surface of the printing plate.

  The ink filling blade 232 is preferably installed so that the upper end of the blade is inclined in the direction in which the ink filling blade 232 moves horizontally in terms of uniform ink filling. On the other hand, the residual ink removing blade 233 is installed so that the upper end of the blade is inclined in the direction opposite to the direction in which the residual ink removing blade 233 moves horizontally, so that the residual ink on the printing plate is completely removed. This is preferable.

  The transfer roll 234 touches the upper surface of the printing plate 212 and rotates and moves the ink filled in the grooves 214 to the surface as it is, and then plays a role of printing on the upper surface of the substrate. The transfer roll 234 is formed by wrapping a cylindrical roller 234a with a blanket 234b having a constant thickness. The blanket 234b is a kind of cover and is configured to wrap the surface of the roller 234a. This blanket 234b must be made of a material that allows the ink filled in the groove 214 of the printing plate 212 to be easily bound, and a material having some elasticity is filled in the groove 214 of the printing plate 212. It is preferable because it can be easily brought into contact with the ink.

  The printing unit moving device 240 plays a role of moving the printing unit 230 in the horizontal direction, the vertical direction, and the vertical direction. The printing unit moving device 240 fills the printing plate 212 with ink, transfers it to the transfer roll 234, moves from the printing plate 212 to a desired position on the substrate 222, and the pattern transferred to the transfer roll 234. The printing unit 230 is moved in the process of transferring the image onto the substrate 222.

  Further, the printing unit moving device 240 can align the printing unit 230. That is, the printing unit moving device 240 horizontally moves the printing unit 230 in a direction perpendicular to the arrangement direction of the printing platen and the substrate platen, and determines the position where the pattern is transferred on the substrate.

  12A to 12E are views illustrating a process of transferring a repair pattern to a substrate using an LCD panel repair apparatus according to an embodiment of the present invention.

  As shown in FIG. 12A, the ink supply unit 231 is driven to supply a predetermined amount of ink I to the upper surface of the printing plate 212. At this time, the amount of ink supplied from the ink supply unit 231 must be set so as to cover the entire upper portion of the printing plate 212. The point where the ink is supplied is preferably one end of the printing plate 212. When the ink is supplied to the intermediate point of the printing plate, the number of horizontal movements of the ink filling blade 232 increases in the subsequent ink filling process, and the process time becomes longer.

  Subsequently, as shown in FIG. 12B, the ink I supplied to the upper surface of the printing plate 212 is uniformly distributed over the entire surface of the printing plate 212 using the ink filling blade 232, and is formed on the upper surface of the printing plate. All of the grooves 214 are filled with ink.

  Next, as shown in FIG. 12C, the remaining ink removing blade 233 is used to remove the ink I other than the ink filled in the groove 214, that is, the ink I remaining on the upper surface of the printing plate. The ink filled in the groove 214 is subsequently formed as a pattern on the substrate by a transfer and printing process, but the ink other than the ink filled in the groove 214 is printed on the substrate 222 via the transfer roll 234. In order to prevent the formation of undesired patterns, it must be completely removed. For this reason, in this embodiment, the residual ink existing on the upper surface of the printing plate is completely removed while horizontally moving the lower end surface of the residual ink removing blade 233 so as to be inclined in the direction opposite to the traveling direction. .

  Subsequently, as shown in FIG. 12D, the blanket 234b removes the ink filled in the grooves 214 on the upper surface of the printing plate while rotating the transfer roll 234 in contact with the upper surface of the printing plate filled with ink. Transfer process to the surface of the.

  At this time, the size and interval of the pattern formed on the printing plate 212 must be transferred onto the blanket as they are. Therefore, the rotation speed and horizontal movement speed of the transfer roll must be adjusted with extremely high accuracy.

  In order to transfer the ink filled in the groove 214 of the printing plate 212 to the blanket 234b completely, it is preferable to perform the transfer process while slightly pressing the transfer roll 234 to the printing plate 212.

  Next, as shown in FIG. 12E, after the printing unit 230 is moved to the printing start area using the printing unit moving device 240, the transfer roll 234 is rotated and moved while being in contact with the upper surface of the substrate 222. The ink transferred to the roll 234 is printed on the surface of the substrate.

  FIG. 13 is a diagram illustrating a structure of an LCD panel repair device according to another embodiment of the present invention. As shown in FIG. 13, the LCD panel repair apparatus according to another embodiment of the present invention includes a base 300, a substrate surface plate 310, and a printing unit 320. The LCD panel repair device according to another embodiment of the present invention includes a printing unit moving device that moves the printing unit 320 to the X axis, the Y axis, and the Z axis, although not shown.

  The substrate surface plate 310 is configured in the same manner as the substrate surface plate 210 described with reference to FIG.

  The printing unit 320 plays a role of printing a specific pattern on the upper surface of the substrate 312 mounted on the substrate surface plate 310. The printing unit 320 includes a printing roll 321, an ink supply unit 322, an ink filling blade 323, a residual ink removal blade 324, and a transfer roll 325.

  The printing roll 321 is a cylindrical roll having a constant groove 321a formed on the surface. This is a component corresponding to the printing plate 210 in FIG. 11, and a groove 321a corresponding to a pattern to be formed on the substrate 312 is formed on the surface thereof. When the printing roll is used, another printing platen is omitted, and the area occupied by the apparatus can be reduced.

  Since the printing roll 321 rotates at the same speed as the transfer roll 325 in the process of transferring the pattern to the transfer roll 325, the printing roll 321 has a structure that is driven to rotate about its central axis.

  The ink supply unit 322 supplies a predetermined amount of ink I to the surface of the printing roll 321, and the ink filling blade 323 supplies the ink supplied to the surface of the printing roll 321 to the groove 321 a formed on the surface of the printing roll. The remaining ink removing blade 324 is filled to remove the ink remaining in the grooves 321a from the surface of the printing roll.

  The transfer roll 325 rotates while touching the surface of the printing roll 321, transfers the ink pattern filled in the groove 321 a as it is, and prints it on the upper surface of the substrate 312. The transfer roll 325 has a structure that can rotate about its central axis in the state of contact with the printing roll 321. Here, it is preferable that the diameter of the transfer roll 325 and the diameter of the printing roll 321 are substantially the same, and it is preferable to have the same rotation speed because the pattern on the printing roll 321 can be transferred to the transfer roll 325 as it is. .

DESCRIPTION OF SYMBOLS 10 1st board | substrate 11 1st base substrate 12 Gate electrode 13 Insulating film 14 Semiconductor layer 15a Source electrode 15b Drain electrode 16 Protective film 17 Pixel electrode 18 Storage electrode 20 Liquid crystal layer 30 2nd board | substrate

Claims (9)

A laser beam device for removing defective patterns on the LCD panel;
A laser beam moving device for moving the laser beam device;
A printing plate on which grooves corresponding to the repair pattern of the defective pattern of the LCD panel are formed;
A base on which the LCD panel and the printing plate are placed;
A printing unit for filling the grooves formed in the printing plate with ink to form the repair pattern, and transferring the formed repair pattern to the LCD panel;
A printing unit moving device for moving the printing unit;
A control device for controlling the laser beam device to remove the defective pattern of the LCD panel, and the printing unit to form the repair pattern and transfer it to the LCD panel;
A liquid crystal display panel repair device. The printing unit includes:
An ink supply unit for supplying ink to the grooves of the printing plate;
A blade for removing the ink remaining in the grooves of the printing plate from the upper surface of the printing plate;
A transfer member for transferring the ink pattern filled in the groove to the surface, and transferring the transferred ink pattern to the LCD panel;
The liquid crystal display panel repair apparatus of Claim 1 containing this.   The transfer member is in contact with the upper surface of the printing plate so as to transfer the ink pattern filled in the groove to the surface, and is transferred to the LCD panel so as to transfer the ink pattern transferred to the surface to the LCD panel. The liquid crystal display panel repair apparatus of Claim 2 containing the stamp which contacts.   The transfer member rotates and moves in contact with the upper surface of the printing plate so as to transfer the ink pattern filled in the groove to the surface, and transfers the ink pattern transferred to the surface to the LCD panel. The liquid crystal display panel repair device according to claim 3, further comprising a transfer roll that rotates while moving in contact with the LCD panel.   The liquid crystal display panel repair device according to claim 4, wherein the transfer roll includes a cylindrical roller and a blanket that wraps the roller. A laser beam device for removing defective patterns on the LCD panel;
A laser beam moving device for moving the laser beam device;
A base on which the LCD panel is placed;
A printing unit that forms a repair pattern of the defective pattern of the LCD panel, and transfers the formed repair pattern to the LCD panel;
A printing unit moving device for moving the printing unit;
A control device for controlling the laser beam device to remove the defective pattern of the LCD panel, and the printing unit to form the repair pattern and transfer it to the LCD panel;
A liquid crystal display panel repair device. The printing unit includes:
Grooves having the same form as the repair pattern are formed on the surface, and a printing roll that rotates about the central axis as a rotation center;
An ink supply unit for supplying ink to the surface of the printing roll;
A blade for removing the ink remaining in the grooves of the printing roll from the surface of the printing roll;
A transfer roll that rotates while in contact with the surface of the printing roll, transfers the ink pattern filled in the grooves of the printing roll to the surface, and transfers the transferred ink pattern to the LCD panel;
The liquid crystal display panel repair apparatus of Claim 6 containing this. The defective pattern of the LCD panel is removed by the laser beam,
Ink is filled into the grooves of the printing plate on which grooves having the same shape as the repair pattern of the removed defective pattern are formed,
Transfer the ink pattern filled in the grooves of the printing plate to the surface of the transfer member,
Transferring the ink transferred to the surface of the transfer member to the LCD panel;
A method for repairing a liquid crystal display panel, comprising:   The liquid crystal display panel repair method according to claim 8, wherein in the step of transferring the ink to a surface of a transfer member, the transfer member is a rotating roll or a stamp.

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