KR20100052866A - Printer - Google Patents

Abstract

PURPOSE: A printing device is provided to control a location of plate which patterns a pattern in outside of a blanket roll, thereby reducing an alignment work time. CONSTITUTION: A stage align unit is combined on a lower part of a work stage, and moves and supports a work stage to a broad surface to align a location of the work stage about a blanket roll(40). A plate patterns at least one of R, G, and B pattern on exterior of the blanket roll. A plate align unit(70) is combined to lower part of the plate, and moves and supports the plate to the broad direction to align a relative location of the plate about the blanket roll.

Description

Print Device {Printer}

The present invention relates to a printing apparatus, and more particularly, it is possible to adjust the position of the plate patterning any one of the R, G, B pattern on the outer surface of the blanket roll to adjust the relative position of the plate relative to the blanket roll It relates to a printing device that can be aligned.

Recently, as the electronic display industry has developed rapidly among the semiconductor industry, flat panel displays (FPD) have begun to appear. Flat panel displays are commonly used as monitors for TVs or computers, or as display devices for devices such as mobile phones, PDAs, and digital cameras. Types of flat panel displays include liquid crystal displays (LCDs) and organic light emitting diodes (OLEDs).

In general, a flat panel display includes a color filter layer for realizing a color, and includes a color filter having a black matrix for preventing light from leaking to areas other than the image display area and degrading the image quality of the display device.

A typical flat panel display having such a color filter is the LCD described above. The LCD includes a thin film transistor substrate on which a thin film transistor is formed, a color filter substrate on which a color filter layer is formed, and a liquid crystal filled between these substrates.

In the color filter layer, as shown in FIGS. 1A and 1B, in which two color filter layers each having R, G, and B patterns printed thereon are shown in FIG. A pixel having a pigment of the pattern is formed. Each pixel may consist of sub-pixels having R, G, and B, but in general, each pixel has one pigment.

In forming the color filter layer, as shown in FIG. 1A, R, G, and B patterns may be arranged in a row and arranged so that R, G, and B patterns are arranged in the same column, respectively, or as shown in FIG. 1B. As described above, R, G, and B patterns may be repeatedly arranged in the same row. The difference in resolution can be realized in various ways according to the arrangement of the R, G, and B patterns.

The color filter layer may be formed by various methods, for example, a dyeing method, a printing method, an adhesive method, a pigment dispersion method and the like. In the LCD of STN (Super Twisted Nematic) method, which is one of the conventional passive matrix methods, a color filter layer is mainly manufactured by a dyeing method, a printing method, and an adhesive method.

However, in recent years, various researches have been conducted on the printing method so that the printing method can be actually applied to form the color filter layer of the TFT LCD.

The printing method includes a gravure or inverted pattern plate filled with color resist and a blanket roll interacting with them to print a color resist pattern of the pigment onto a substrate by a blanket roll, and then It is a system which prints the color resist of a different color sequentially on a board | substrate with another blanket roll.

Printing apparatuses can generally be classified into three types according to printing methods. One printing apparatus is a printing apparatus in which a roll-shaped gravure roll transfers a color resist to a blanket roll and then a method of transferring the transferred color resist onto a substrate is printed (printing). The apparatus is a printing apparatus in which a blanket roll moves on a top surface of a plate-shaped gravure plate and transfers the color resist on the gravure plate and then transfers the color resist onto the substrate. A printing apparatus is a printing apparatus to which the method of removing the inversion pattern of the color resist apply | coated on the blanket roll through the inversion pattern plate, and retransferring the color resist on the blanket roll on a board | substrate is applied.

In such printing apparatuses, it is important to pattern certain patterns on the blanket rolls patterned by gravure rolls, gravure plates or inverted pattern plates at the correct position of the substrate placed on the work stage.

In the case of the gravure roll type, when the position alignment of the work stage to which the substrate is loaded is completed, the blanket roll moves to the entry portion of the work stage, and then moves to the surface of the substrate and rotates and rotates to the surface of the substrate. One of the patterns can be printed. That is, by aligning the position of the work stage with respect to the substrate, the subsequent printing operation of the substrate can proceed reliably.

However, in the case of gravure plates, since there is no separate aligning device for aligning the position of the gravure plate relative to the blanket roll, before performing the actual printing operation of transferring the color resist on the gravure plate to the substrate loaded on the work stage. There are difficulties in performing several proactive print and measurement operations, for example, to compensate for error values. Especially, since the gravure plate is not cleaned when the gravure plate is cleaned or changed to a substrate different from the previous work target, the gravure plate is not aligned. For example, there was a problem in that alignment was performed at that time by performing a retransmission operation on the substrate on the basis of a gravure plate.

Therefore, the relative position of the gravure plate relative to the blanket roll is accurately determined so that the process of printing any one of the R, G, and B patterns patterned on the gravure plate onto the substrate on the work stage can be simple, accurate, and rapid. It is necessary to develop a printing apparatus that can be aligned.

An object of the present invention is to adjust the position of the plate patterning any one of the R, G, B pattern on the outer surface of the blanket roll to align the relative position of the plate relative to the blanket roll It is possible to reduce the tact time required for the print job, thereby providing a printing apparatus capable of performing a reliable print job on a substrate to be printed.

The object is that, according to the present invention, the printing operation for at least one of the R (Red), G (Green), B (Blue) pattern on the substrate by the blanket roll can be carried out on the upper surface, A work stage supporting the substrate; A stage alignment unit coupled to a lower portion of the work stage, the stage alignment unit movably supporting the work stage in a plate direction to align the position of the work stage with respect to the blanket roll; A plate-shaped plate for patterning any one selected from R (Red), G (Green), and B (Blue) patterns on an outer surface of the blanket roll; And a plate aligning unit coupled to a lower portion of the plate, the plate aligning unit movably supporting the plate in a plate direction to align a relative position of the plate with respect to the blanket roll. Achieved by the device.

Here, the plate alignment unit may further include a plate support provided in the lower region of the plate for supporting the plate alignment unit.

The plate alignment unit may include four plate moving support parts disposed between the plate and the plate support part provided in corresponding shapes, and provided in four corner regions of the plate and the plate support part.

Each of the four plate moving supports includes a motor; A ball screw coupled to the motor and rotatable in a forward and reverse direction by the motor; A moving block coupled to the ball screw and movable along the longitudinal direction of the ball screw when the ball screw rotates; An intersecting block coupled to an upper end of the moving block and freely moving in a direction crossing the moving block; And both ends may include a fixed block fixed to the upper surface of the cross-block and the lower surface of the plate, respectively.

Each of the four plate moving support parts may further include a guide rail provided on an upper surface of the plate support part to guide the movement of the moving block.

Each of the four plate moving support parts may include: a protruding member protruding upward from an upper surface of the moving block and having a through hole penetrating therein; And a moving shaft movably coupled to the protruding member so as to pass through the through hole, and at least a portion of which is fixed to the intersecting block.

Each of the four plate moving support parts may further include a rotation support member provided on an opposite side of the motor with the ball screw therebetween to rotatably support the end of the ball screw.

The printing apparatus may include: a sensing unit provided around the plate to sense a relative alignment position of the plate with respect to the blanket roll; And a controller configured to control the movement of the plate alignment unit based on the signal of the detector.

The printing apparatus may include: a moving rotating unit coupled to both sides of the blanket roll and moving and rotating the blanket roll to an upper surface of the plate; And a pair of gantry portions coupled to the moving rotary part to move to an upper surface of the plate together with the moving rotary part, wherein the sensing unit is provided in the pair of gantry parts, respectively, in the corresponding gantry part. The gantry may be coupled to be movable along the length direction.

The sensing unit may be an alignment photographing camera that photographs an alignment mark displayed on four corner regions of the upper surface of the plate and transmits the captured image information to the controller.

A height adjusting part coupled to the plate supporting part to adjust a height of the plate supporting part including the plate; And a probe unit provided around the height adjusting part to measure a lifting height of the plate support part.

The printing apparatus may further include a stage supporter provided in the lower region of the work stage with the stage alignment unit therebetween to support the stage alignment unit.

The stage alignment unit may include four stage moving support parts disposed between the work stage and the stage support part provided in corresponding shapes, and provided in four corner regions of the work stage and the stage support part. .

Each of the four stage moving supports includes a motor; A ball screw coupled to the motor and rotatable in a forward and reverse direction by the motor; A moving block coupled to the ball screw and movable along the longitudinal direction of the ball screw when the ball screw rotates; An intersecting block coupled to an upper end of the moving block and freely moving in a direction crossing the moving block; A fixed block having both ends fixed to an upper surface of the cross block and a lower surface of the work stage, respectively; And a guide rail provided on an upper surface of the stage supporter to guide the movement of the movable block.

The printing apparatus may include a coating unit provided to be movable above the plate to apply the color resist to the surface of the plate; And a blade unit provided adjacent to the coating unit and dispersing the color resist coated by the coating unit to the entire area of the surface of the plate and then removing the color resist diffused on the remaining surfaces except for the pattern portion. It may further include.

The blade unit, the blade body portion coupled to the coating unit; A diffusion blade coupled to the blade body and configured to diffuse the color resist applied on the plate to a front surface of the plate while being spaced apart from an upper portion of the plate; And a removal blade coupled to the blade body and removing the color resist diffused in an unnecessary portion of the color resist diffused on the front surface of the upper portion of the plate.

The blade body portion, the diffusion blade body is coupled to one side of the coating unit, the diffusion blade is coupled; And coupled to the other side of the coating unit, it may include a removal blade body to which the removal blade is coupled.

The diffusion blade is rotatably coupled to the movable block, the knife holder is mounted on the front end with a knife for diffusing the color resist applied to the plate; And a holder rotating drive unit for generating a driving force for rotating the knife holder with respect to the moving block, wherein the removal blade is rotatably coupled to the moving block and spreads on a front surface of the upper portion of the plate at the front end thereof. A knife holder mounted with a knife for removing color resist diffused in an unnecessary portion of the color resist; And it may include a holder rotating drive for generating a driving force for rotating the knife holder with respect to the block.

The plate may be configured to form a predetermined pattern on the outer surface of the blanket roll by removing an inversion pattern among a gravure plate transferring the color resist of the predetermined pattern to the blanket roll and the color resist diffused on the outer surface of the blanket roll. It may be any one of the inversion pattern plate.

According to the present invention, it is possible to adjust the position of the plate patterning any one of the R, G, B pattern on the outer surface of the blanket roll to align the relative position of the plate relative to the blanket roll (align) The tact time required for the job can be reduced, and thus, a reliable print job can be performed on the substrate to be printed.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

For reference, the substrate to be described below refers to a flat panel display (FPD) substrate including a liquid crystal display (LCD), a plasma display panel (PDP), organic light emitting diodes (OLED), and the like, for convenience of description. For the sake of brevity, these will be referred to as substrates. In addition, the board | substrate which is demonstrated below in the area is considered to point to the large board | substrate whose length / length is 1 meter (m) or more.

2 is a schematic structural diagram of a printing apparatus according to an embodiment of the present invention, FIG. 3 is an enlarged front view and a partially enlarged view of the blanket roll region shown in FIG. 2, and FIG. 4 is a gravure plate shown in FIG. 2. 5 is a schematic perspective view of an area, and FIG. 5 is a view for explaining the configuration of the plate alignment unit shown in FIG. 4, FIG. 6 is a perspective view of the moving support shown in FIG. 5, and FIG. 8 is a cross-sectional view taken along an X-ray, and FIG. 8 is a diagram for describing a configuration of a sensing unit for photographing an alignment mark on a gravure plate.

As shown in these drawings, the printing apparatus according to an embodiment of the present invention, the plate-shaped gravure plate 10, the upper surface is provided with a flat surface, and R (Red) to the outer surface of the gravure plate 10 ), G (Green), B (Blue) color resist (also referred to as 'color ink' or 'color pigments', etc.) the coating unit 30 for applying any one of the color resist, and the gravure plate 10 The blade unit 20 which diffuses the color resist applied to the outer surface of the gravure plate 10 to the entire outer surface of the gravure plate 10 and then removes the color resist applied to the unnecessary portion, and R, G, from the gravure plate 10 A blanket roll 40 which receives the B color resist and retransmits any one of R, G and B patterns to the surface of the substrate G, and the blanket roll 40 from the gravure plate 10. Color resist on the outside of the The plate alignment unit 70 which aligns the relative position of the gravure plate 10 with respect to the blanket roll 40 at the time of transition, and the work stage 60 in which the printing operation with respect to the board | substrate G is progressed. And align the relative position of the work stage 60 with respect to the blanket roll 40 when the blanket roll 40 retransfers the color resist to the substrate G on the upper surface of the work stage 60. The stage alignment unit 61 and the lower base 90 for supporting them.

The gravure plate 10 serves to transfer any color resist selected from R, G, and B color resists to the outer surface of the blanket roll 40. The area of the surface of the gravure plate 10 has a size substantially similar to the area of a sheet (not shown) wound on the blanket roll 40, and the blanket roll 40 in one direction from the one end of the gravure plate 10 to the other end. By rotating and moving, any one of R, G, and B patterns patterned on the gravure plate 10 may be transferred onto the sheet of the blanket roll 40.

For reference, as described above with reference to FIGS. 1A and 1B, in printing R, G, and B on the substrate G, the R, G, and B patterns are not simultaneously printed on the substrate G through one printing apparatus. . That is, at least three printing apparatuses are provided to print the R, G, and B patterns on the substrate G. Each of the R, G, and B patterns is selected by the three printing apparatuses and printed on the substrate G. Will be.

Therefore, first, the coating unit 30 for applying the color resist to the outer surface of the gravure plate 10 is to apply only one color resist selected from the R, G, B color resist to the outer surface of the gravure plate 10. Expressed easily, the coating unit 30 is to apply only one ink selected from red, green, blue to the outer surface of the gravure plate 10.

Although not shown in detail, the outer surface of the gravure plate 10 is patterned with an uneven pattern to which a color resist is substantially applied. As shown in FIG. 2, the uneven pattern at this time can be embossed or embossed. In the embossed form, the color resist is applied to the outer surface of the protruding convex-concave portion and transferred to the blanket roll 40. In the engraved form, the color resist is applied inside the recessed recess portion 10a (see FIGS. 2 and 4). Transition to blanket roll 40.

However, when the blanket roll 40 receives the color resist from the outer surface of the gravure plate 10 and transfers the color resist to the substrate G to form the R, G, and B patterns having the shapes as shown in FIGS. 1A and 1B, In order to maintain the thickness of the R, G, and B patterns uniformly from the surface of the substrate G, it may be advantageous that the uneven pattern formed on the outer surface of the gravure plate 10 has an intaglio shape.

When applying one of the color resists selected from R, G, and B color resists to the outer surface of the gravure plate 10 by the application unit 30, as shown in the enlarged portion of FIG. Color resist should be applied only to the recess 10a. However, when the coating unit 30 applies the color resist to the outer surface of the gravure plate 10, it is difficult to apply the color resist at a time such that the color resist is selectively received only in the recess portion 10a of the substantially intaglio shape.

Therefore, when the coating unit 30 applies the color resist to the outer surface of the gravure plate 10, the color resist is diffused and applied to the entire surface of the gravure plate 10, and when the application is completed, the recess 10a of the intaglio shape is completed. By removing the unnecessary color resist applied to the remaining surface 10b, the color resist is finally contained only in the recess 10a. To this end, the blade unit 20 which is movable along the outer surface of the gravure plate 10 is provided around the coating unit (30).

As shown schematically in FIG. 2, the blade unit 20 of the present embodiment is coupled to both sides of the coating unit 30 to move the upper portion of the gravure plate 10 and to the front end portion of the outer surface of the gravure plate 10. After spreading the coated color resist on the outer surface of the gravure plate 10 serves to remove the color resist diffused on the remaining surface 10b except for the recess 10a.

Referring to the configuration of the blade unit 20 in more detail, the blade unit 20 is coupled to the blade body portion 21, the blade body portion 21 and spaced apart from the outer surface of the gravure plate 10 The diffusion blade 25a for diffusing the color resist applied on the gravure plate 10 to the front surface of the gravure plate 10 and the blade body 21 so as to face the diffusion blade 25a and are coupled to the diffusion blade ( The removal blade 25b which removes the color resist diffused in the remaining surface 10b except the recessed part 10a among the color resists spread by the front surface of the gravure plate 10 by 25a) is provided.

The blade body portion 21 is coupled to one side of the application unit 30 and the diffusion blade body 21a to which the diffusion blade 25a is coupled, and the other side of the application unit 30 and the removal blade 25b. ) Is provided with a removal blade body (21b) is coupled. By this configuration, when the blade unit 20 coupled to the application unit 30 moves in the direction of the work stage 60 from the upper gravure plate 10, the diffusion of the color resist may proceed, and the color moves in the opposite direction. The removal of the resist may proceed.

The diffusion blade body 21a and the removal blade body 21b have substantially the same configuration. The diffusion blades 25a and the removal blades 25b are coupled to the fixed blocks 22a and 22b fixedly coupled to the application unit 30 and to move up and down relative to the fixed blocks 22a and 22b, respectively. Moving blocks 23a and 23b to which the 25a and removal blades 25b are coupled, and the lifting lowering parts 24a and 24b for driving the moving blocks 23a and 23b up and down relative to the fixed blocks 22a and 22b, respectively. ).

Diffusion blades 25a coupled to the movable blocks 23a and 23b by moving the movable blocks 23a and 23b in the height direction with respect to the fixed blocks 22a and 22b fixedly coupled to the application unit 30. The removal blades 25b may approach or be spaced apart from the outer surface of the gravure plate 10. That is, the distance between the outer surface of the gravure plate 10 and the diffusion blades 25a and the removal blades 25b may be adjusted by moving the moving blocks 23a and 23b relative to the fixed blocks 22a and 22b. It is.

The diffusion blade 25a serves to diffuse the color resist applied to the front end region of the outer surface of the gravure plate 10 to the entire region of the outer surface of the gravure plate 10 and is spaced apart from the gravure plate 10 by a predetermined distance. The knife 26a for diffusing the color resist in the state of maintaining and the knife 26a are supported and coupled to the distal end and rotatably coupled to the moving block 23a so that the knife 26a with respect to the gravure plate 10 Knife holder (27a) to adjust the inclination angle, and holder rotating drive (28a) for generating a driving force for rotating the knife holder 27a with respect to the moving block (23a).

In order to apply the color resist to the entire area of the outer surface of the gravure plate 10, the diffusion blade 25a must be located in the tip region of the outer surface of the gravure plate 10, and the predetermined distance from the outer surface of the gravure plate 10 It should be moved linearly along the longitudinal direction of the gravure plate 10 in the maintained state. That is, the position of the knife 26a of the diffusion blade 25a with respect to the gravure plate 10 should be determined. This positioning is determined in the height direction by the elevating driving unit 24a described above, and then the knife holder 27a is rotated by the rotating driving unit 28a so that the diffusion blade 25a with respect to the gravure plate 10 is rotated. You can set the most suitable position of.

The removal blade 25b has a configuration substantially the same as the diffusion blade 25a. However, in order to remove the color resist diffused to the remaining surface 10b except for the recess 10a among the outer surfaces of the gravure plate 10, the knife 26b of the removal blade 25b is formed of the gravure plate 10. In contact with the outer surface, the color resist diffused on the remaining surface 10b except for the recess 10a of the outer surface of the gravure plate 10 is moved in the direction opposite to the direction in which the diffusion operation is performed.

On the other hand, the color resist removed from the outer surface of the gravure plate 10 should be discharged to the outside. If the color resist removed by the removal blade 25b falls out of the gravure plate 10, the work space may be contaminated, which may lower the reliability of the printing operation on the substrate G.

Accordingly, as shown in FIG. 2, a collecting container 18 for collecting the removed color resist is mounted on one side of the gravure plate 10. This container 18 has a width length and a substantial length of the gravure plate 10, so that the color resist removed by the removal blade 25b can be reliably collected without being discharged to the outside.

On the other hand, when the diffusion blade 25a and the removal blade 25b repeatedly diffuse and remove the color resist, the color resist remains on the knives 26a and 26b mounted at the front end thereof, thereby reducing the reliability of the operation. In order to solve this problem, a cleaning unit (not shown) for cleaning the knives 26a and 26b may be mounted in an adjacent area of the blade unit 20.

On the other hand, after applying the color resist to the outer surface of the gravure plate 10, the applied color resist is transferred onto the sheet wound on the outer surface of the blanket roll 40. At this time, the relative position of the gravure plate 10 with respect to the blanket roll 40 must be exactly aligned so that the color pattern of the correct pattern can be transferred from the gravure plate 10 to the substrate G placed on the work stage 60. Since it can be (printed), the printing apparatus of this embodiment further includes a plate alignment unit 70 for aligning the relative position of the gravure plate 10 with respect to the blanket roll 40. This will be described later in detail.

First, the blanket roll 40 will be described. The blanket roll 40 is a substrate G loaded on the work stage 60 by transferring a color resist having a predetermined pattern formed on the outer surface of the gravure blanket roll 40. It is a substantial printing roll which prints R, G, B pattern on the board | substrate G, moving and rotating toward.

As described above, the sheet to which the color resist is transferred from the gravure plate 10 is wound on the outer surface of the blanket roll 40. Of course, the sheet used more than the number of times the appropriate limit has to be replaced, so the blanket roll 40 is further provided with a sheet replacement means (not shown) for easy replacement of the sheet. The sheet replacement means serves to provide a certain tension to the sheet so that the blanket roll 40 can be unfolded and unfolded on the outer surface while allowing the sheet to be easily replaced.

In the printing apparatus of the present embodiment, the blanket roll 40 transfers the color resist of the gravure plate 10 and then retransfers (prints) the substrate G loaded on the work stage 60. In order to proceed the blanket roll 40 should be able to move up and down.

Thus, as shown in FIG. 3, the blanket roll 40 includes a plurality of elevating driving units 50 for elevating the blanket roll 40 with respect to the gravure plate 10 and the work stage 60. Prepared. In the present embodiment, the plurality of lifting driving units 50 are arranged in quadrangular configurations so as to be spaced apart from each other in the lower region of the blanket roll 40 with respect to the blanket roll 40.

As shown in FIG. 3, each of the plurality of lift drivers 50 includes a servo motor 51 rotatable in a forward and reverse direction and a servo motor 51 along a direction in which the blanket roll 40 is lifted up and down. The ball screw 52 is coupled to the motor shaft of the, and the roll support portion coupled to the ball screw 52 to move up and down along the longitudinal direction of the ball screw 52 and at least one side is coupled to the blanket roll 40 ( 53).

Thus, when power is applied to the servo motor 51 and the motor shaft of the servo motor 51 rotates in the forward and reverse directions, the ball screw 52 rotates in the forward and reverse directions coaxially with the blanket through the roll support 53. The roll 40 can be raised and lowered.

On the other hand, for a substantial printing operation on the substrate G, that is, transition and re-transfer operation, the blanket roll 40 should be able to rotate while moving on the gravure plate 10 and on the work stage 60. do.

To this end, both sides of the blanket roll 40, as shown in Figure 3, on the rail 91 of the lower base 90 to move the blanket roll 40 in a straight direction, as well as the blanket roll 40 at the corresponding position ) Is provided with a moving rotary part 42 for rotating.

The moving rotation part 42 is divided into the moving part 42a for linearly moving the blanket roll 40 along the longitudinal direction of the lower base 90, and the rotating part 42b for rotating the blanket roll 40. FIG. The former may be applied to a linear motor (Linear Motor), etc. capable of precise control, the latter may be applied to a DC motor.

On the other hand, the work stage 60 of the present embodiment may be aligned in the plate surface direction for the alignment of the substrate (G) with respect to the blanket roll 40.

 To this end, the stage aligning unit 61 for aligning the position of the work stage 60 is movably coupled to the lower portion of the work stage 60, and the stage aligning portion is disposed below the stage alignment unit 61. The stage support 69 supporting the unit 61 is coupled. Here, in order to align the position of the substrate G on the work stage 60 with respect to the blanket roll 40, the degree of twist in the plate surface direction of the work stage 60 is detected, and the detected information is detected. On the basis of this, the position of the work stage 60 should be aligned. This role is performed by the sensing unit 85 (see FIG. 2) and the control unit (not shown), respectively. The sensing unit 85 is coupled to the gantry portion 86 of the blanket roll 40 to detect the positions of the work stage 60 and the gravure plate 10, which will be described in detail when the plate alignment unit 70 is described. Let's do it.

As shown in FIG. 3, the stage alignment unit 61 is disposed between the work stage 60 and the stage support 69, and the four corner regions of the work stage 60 and the stage support 69 are provided. Four stage moving support part 62 is provided in each. As such, when the stage moving support part 62 is arranged in a rectangular composition on the stage support part 69, the work stage 60 can be stably supported, and the color resist operation of the blanket roll 40 with respect to the substrate G is also performed. This should allow it to proceed reliably.

As shown in FIG. 3, each stage moving support part 62 includes a motor 63 as a driving source, a ball screw 64 coupled to the motor 63, and rotatable in a forward and reverse direction by the motor 63. The ball screw 64 is provided on the opposite side of the motor 63 with the rotation support member 65 rotatably supporting the end of the ball screw 64 and the ball screw 64 coupled to the ball screw. When the rotation of the (64) rotates the moving block 66, which is movable along the longitudinal direction of the ball screw 64, and coupled to the moving block 66, the movable block 66 is coupled to move in a direction intersecting with the moving direction of the moving block 66 And a fixed block 68 fixedly coupled to the upper surface of the intersecting block 67 and the lower surface of the work stage 60.

The moving block 66 may move forward and backward of the motor 63 by the rotation of the ball screw 64. At this time, the upper surface of the stage support 69 may be moved to stabilize the movement of the moving block 66. A guide rail 66r for guiding the movement of the movable block 66 is provided.

However, the moving block 66 is moved by the operation of the motor 63, but the cross block 67 is different from the driving principle of the moving block 66 on the moving block 66 of the moving direction of the moving block 66 Free movement in the horizontal direction. To this end, a rail (not shown) is formed at the coupling portion of the cross block 67 and the moving block 66 so that the cross block 67 can move relative to the moving block 66.

On the other hand, each stage moving support portion 62 is provided in each of the four corner regions of the stage support portion 69 so that the longitudinal direction of the ball screw 64 provided with each can be substantially perpendicular, such arrangement structure By this, the four stage movement support parts 62 can mutually interlock | work and can adjust the position of the work stage 60 suitably.

On the other hand, as described above, when the blanket roll 40 transfers a predetermined pattern of color resist from the gravure plate 10, the aligning of the gravure plate 10 with respect to the blanket roll 40 should be performed.

As described above, in the conventional case, when the gravure plate (not shown) is inclined in the plate direction relative to the substrate (not shown) on the work stage (not shown), the blanket roll (not shown) is the collar on the gravure plate. In order to transfer the resist to the substrate placed on the work stage, the retransmission operation for the error value correction must be performed several times before the actual retransition operation is performed. In particular, when cleaning the outer surface of the gravure plate or changing to a substrate different from the previous work target, the efficiency and reliability of the work are deteriorated since several re-transfer operations must be performed for correcting the error value at that time. there was.

Therefore, in order to solve this problem, the printing apparatus of the present embodiment, before aligning the substrate (G), by precisely aligning the relative position of the gravure plate 10 with respect to the blanket roll 40, the blanket roll The plate alignment unit 70 further includes a plate alignment unit 70 for transferring the correct pattern of color resist. In addition, the position of the gravure plate 10 with respect to the plate support unit 80 and the blanket roll 40 coupled to the lower base 90 so as to be parallel to the gravure plate 10 with the plate alignment unit 70 therebetween. Detection unit 85 for detecting the aligning state of the gravure plate 10 to check whether the alignment is correctly aligned, and driving the plate alignment unit 70 through the detected information to move the gravure plate 10 It further includes a control unit (not shown) for controlling the. However, the sensing unit 85 and the control unit, as described above, is responsible for detecting and controlling the position of the work stage 60 as well as the gravure plate 10, hereinafter, the alignment of the gravure plate 10 A case of detecting the position and aligning the position of the gravure plate 10 based on the detected information will be described.

The plate support 80 is used as a place where most of the components described below are mounted, and forms a reference plane for moving the gravure plate 10 in the X-axis, Y-axis, and θ-axis directions.

The sensing unit 85 is provided in the area around the gravure plate 10, more specifically in the front region of the blanket roll 40, as shown schematically in FIGS. 2 and 8. The relative alignment position of the plate 10 is sensed.

As described above, the sensing unit 85 is a pair of gantry portions that are partially coupled to the movable rotation unit 42 which rotates the blanket roll 40 while moving along the rail 91 of the lower base 90. It is provided at 86. One end of the gantry 86 having a rod shape is coupled to the moving rotation part 42, so that when the moving rotation part 42 moves along the rail 91 of the lower base 90, the gantry part 86 is also lowered. It can move along the rail 91 of the base 90.

The pair of gantry 86 is provided with a sensing unit 85, each sensing unit 85 is coupled to be movable along the longitudinal direction of the corresponding gantry (86). The sensing unit 85 individually photographs the alignment marks 15 formed at the four corner regions of the gravure plate 10 at the corresponding positions, and then aligns the photographing camera 85 for transmitting the captured image information to the controller. Is prepared. However, in the present embodiment, the sensing unit 85 is applied as the alignment photographing camera 85, but the present invention is not limited thereto.

For reference, since the correct position information of the gravure plate 10 is previously input to the control unit, the image information photographed by the alignment photographing camera 85 photographing the alignment mark 15 of the gravure plate 10 at the corresponding position. When the control unit is sent to the control unit, the control unit may compare these values to calculate a wrong value of the gravure plate 10 with respect to the blanket roll 40, and by moving the gravure plate 10 through the calculated value, the blanket roll 40 Relative position alignment of the gravure plate 10 with respect to can be performed.

Here, the distance that the gravure plate 10 is moved in the plate surface direction, that is, in the X-axis, Y-axis and θ-axis direction has a value within several millimeters (mm). This is because the alignment photographing camera 85 for photographing the alignment mark 15 formed on the gravure plate 10 has a high precision, and thus the limit of the field of view (FOV) is determined.

Meanwhile, at least a portion of the plate alignment unit 70 which substantially aligns the gravure plate 10 with respect to the blanket roll 40 is coupled to the lower portion of the gravure plate 10, and the gravure plate 10 and The gravure plate 10 is disposed in four corner regions of the plate support 80 so that the gravure plate 10 may move in the plate direction of the gravure plate 10, that is, in the X-axis, Y-axis, and θ-axis directions.

4 and 5, the plate alignment unit 70 includes four plate moving support parts 71 provided at four corner regions of the upper surface of the plate support part 80. As such, when the four plate moving support parts 71 are arranged in a rectangular composition on the plate support part 80, the gravure plate 10 may be stably supported, so that the blanket roll 40 may have a gravure plate when the color resist is transferred. Even when pressing 10 at a high pressing force, the gravure plate 10 can be prevented from moving arbitrarily. That is, the rolling phenomenon can be prevented.

Hereinafter, since the four plate moving support parts 71 have substantially the same configuration, the configuration of the plate moving support part 71 of one of the four plate moving support parts 71 will be described in detail.

As shown in detail in FIG. 6, the plate moving support 71 includes a motor 72 as a driving source, a ball screw 73 coupled to the motor 72 and rotatable in a forward and reverse direction by the motor 72, It is provided on the opposite side of the motor 72 with the ball screw 73 therebetween, the rotation support member 74 for rotatably supporting the end of the ball screw 73, and is coupled to the ball screw 73 and the ball screw ( 73 is coupled to the movable block 75 which is movable along the longitudinal direction of the ball screw 73 and the movable block 75 at the time of rotation of the ball screw 73, and is coupled to the movable block 75 so as to be movable in the direction crossing the movement direction of the movable block 75. Cross block 76 and the fixed block 77 is fixedly coupled to the upper surface of the cross block 76 and the lower surface of the gravure plate 10.

The motor 72 is independently controlled by the controller. That is, as described above, when the twisted degree of the gravure plate 10 with respect to the blanket roll 40 is calculated, the control unit individually controls each motor 72 of the plate moving support 71 to the moving block 75 And, the position of the gravure plate 10 with respect to the blanket roll 40 through the movement of the intersecting block 76 can be aligned.

The moving block 75 may move forward and backward of the motor 72 by the rotation of the ball screw 73. At this time, in order to stabilize the movement of the moving block 75, the guide rail 78 is provided on the upper surface of the plate support portion 80, as shown in Figs.

On the other hand, the moving block 75 is moved by the operation of the motor 72, the cross block 76 is free to move on the moving block 75, unlike the driving principle of the moving block 75. To this end, as shown in FIG. 7, the movable block 75 is provided with a protruding member 75a that protrudes from an upper surface and penetrates a through hole 75h therein, and an intersecting block 76. It is provided with a moving shaft (76s) both ends are coupled to the cross-block 76 and the center portion is movably coupled to the protruding member (75a) so as to pass through the through hole (75h). Through this structure, the intersecting block 76 may move freely along the longitudinal direction of the moving shaft 76s on the upper surface of the moving block 75.

In addition, as described above, the four plate moving support parts 71 may be disposed in four corner regions of the plate support part 80 in a rectangular composition so that the gravure plate 10 may be more stably supported. However, since the gravure plate 10 must be moved in the X-axis, Y-axis, and θ-axis directions to align the gravure plate 10 with respect to the blanket roll 40, the arrangement direction of the plate movement supporting members 71 also needs to be moved. It is an important factor. Therefore, in the present embodiment, as shown in Figure 5, the four plate moving support portion 71 has an arrangement structure similar to the pinwheel shape.

In more detail, in order to move the gravure plate 10 in the X-axis, Y-axis, and θ-axis directions, the ball screws 73 formed on the plate movement support portions 71 are respectively disposed on the upper surface of the plate support portion 80. The ones disposed along the diagonal direction are disposed in substantially the same direction, and the motors 72 provided on the plate moving support parts 71 disposed along the diagonal direction are positioned in opposite directions to each other.

In addition, the plate support portion 80 is further provided with a height adjusting portion 87 coupled to the plate support portion 80 to adjust the height of the plate support portion 80 including the gravure plate 10. Height adjusting portion 87 is implemented in the form of a screw (screw) to allow easy adjustment of the height of the plate support 80, including the gravure plate (10). At this time, in order to measure the height of the plate support 80 which is raised and lowered by the height adjuster 87, a plurality of sides provided on one side of the plate support 80 to face the corresponding height adjuster 87 side. Probe unit 88 is further provided.

Hereinafter, the operation of the printing apparatus having such a configuration will be described.

First, the substrate G is loaded onto the upper surface of the work stage 60 by a separate transfer device (not shown). When the substrate G is transported to the upper portion of the work stage 60, the alignment of the work stage 60 with respect to the substrate G is advanced by the stage alignment unit 61, and then the upper surface of the work stage 60. The substrate G is supported.

Thereafter, the coating unit 30 applies one of the color resists selected from R, G, and B color resists to the top surface of the gravure plate 10. Subsequently, after the blade unit 20 diffuses the color resist applied to a partial region of the gravure plate 10 to the entire outer surface of the gravure plate 10, the remaining surface 10b except the recessed groove 10a is formed. Remove unnecessary colorresist applied to the. Therefore, the color resist is only received in the recess 10a patterned on the upper surface of the gravure plate 10.

When the color resist is applied to the gravure plate 10, the blanket roll 40 is moved to the top of the gravure plate 10 in order for the blanket roll 40 to transfer the patterned color resist on the gravure plate 10. Then, the lowering drive unit 50 is lowered in the direction of the gravure plate 10 by driving. As such, the blanket roll 40 descends and comes into contact with one end region of the upper surface of the gravure plate 10, and the blanket roll 40 moves forward from one end of the gravure plate 10 to the other end to rotate the gravure plate ( The color resist applied to the outer surface of 10) is transferred to the sheet wound on the outer surface of the blanket roll 40 as it is.

However, in such a transition process, in order to execute an accurate printing operation on the substrate G later, the accurate pattern of color resist must be transferred from the gravure plate 10 onto the blanket roll 40. In other words, after the positional alignment of the gravure plate 10 with respect to the blanket roll 40 is accurately made, the transfer operation of the color resist should be performed.

Therefore, for this purpose, during the process of moving the blanket roll 40 to the upper portion of the gravure plate 10, the aligning of the gravure plate 10 by the detection unit 85, that is, the alignment photographing camera 85 of the present embodiment. After capturing the inmark, the controller controls the movement of the gravure plate 10 based on the captured image information to align the position of the gravure plate 10 with respect to the blanket roll 40. This alignment operation can transfer the correct pattern of color resist onto the blanket roll 40.

Next, after the blanket roll 40 transfers the color resist from the gravure plate 10, the blanket roll 40 retransfers the transferred color resist to the substrate G loaded on the work stage 60. In more detail, the blanket roll 40 starts to rotate from one end to the other end on the work stage 60 by the operation of the movable rotating part 42, and the blanket roll 40 moves and rotates. By operation, any one of color resists selected from R, G, and B patterns may be printed on the surface of the substrate G.

As described above, according to the present exemplary embodiment, the plate aligning unit 70 adjusts the position of the gravure plate 10 to transfer any one of R, G, and B patterns to the outer surface of the blanket roll 40. It is possible to precisely align the relative position of the gravure plate 10 with respect to the blanket roll 40 to reduce the tact time required to align the substrate, which is the substrate to be printed (G) has the effect of performing a reliable print job.

In the above-described embodiment, a case in which the plate is a gravure plate has been described, but it is natural that the plate may be an inversion pattern plate rather than a gravure plate.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

1A and 1B are diagrams showing two types of structures of color filter layers printed with R, G, and B patterns, respectively.

2 is a schematic structural diagram of a printing apparatus according to an embodiment of the present invention.

3 is an enlarged front view and a partially enlarged view of the blanket roll region shown in FIG. 2.

FIG. 4 is a schematic perspective view of the gravure plate region shown in FIG. 2.

5 is a view for explaining the configuration of the plate alignment unit shown in FIG.

6 is a perspective view of the moving support shown in FIG.

7 is a cross-sectional view taken along the line VII-VII of FIG. 7.

8 is a view for explaining the configuration of the sensing unit for photographing the alignment mark on the gravure plate.

* Explanation of symbols for the main parts of the drawings

10: gravure plate 20: blade unit

30: coating unit 40: blanket roll

50: lifting and lowering drive unit 60: work stage

70: plate alignment unit 71: moving support

80 plate support 85 detection unit

86: gantry 87: height adjustment

88: probe unit 90: lower base

Claims (19)

Work stage for supporting the substrate on the upper surface so that a print job on at least one of the R (Red), G (Green), and B (Blue) pattern on the substrate can be carried out by the blanket roll. ); A stage alignment unit coupled to a lower portion of the work stage, the stage alignment unit movably supporting the work stage in a plate direction to align the position of the work stage with respect to the blanket roll; A plate-shaped plate for patterning any one selected from R (Red), G (Green), and B (Blue) patterns on an outer surface of the blanket roll; And And a plate aligning unit coupled to a lower portion of the plate, the plate aligning unit movably supporting the plate in a plate direction to align a relative position of the plate with respect to the blanket roll. . The method of claim 1, And a plate support part provided in the lower region of the plate with the plate alignment unit therebetween to support the plate alignment unit. The method of claim 2, The plate alignment unit, And a four plate moving support part disposed between the plate and the plate support part provided in a shape corresponding to each other and provided in four corner regions of the plate and the plate support part. The method of claim 3, Each of the four plate moving support, motor; A ball screw coupled to the motor and rotatable in a forward and reverse direction by the motor; A moving block coupled to the ball screw and movable along the longitudinal direction of the ball screw when the ball screw rotates; An intersecting block coupled to an upper end of the moving block and freely moving in a direction crossing the moving block; And And a fixed block fixed at both ends of an upper surface of the crossblock and a lower surface of the plate. The method of claim 4, wherein Each of the four plate moving support parts further includes a guide rail provided on an upper surface of the plate support part to guide the movement of the moving block. The method of claim 4, wherein Each of the four plate moving support, A protruding member protruding upward from an upper surface of the moving block and having a through hole formed therein; And And a moving shaft movably coupled to the protruding member so as to pass through the through hole, and at least a portion of which is fixed to the intersecting block. The method of claim 4, wherein Each of the four plate moving support, And a rotation support member provided on an opposite side of the motor with the ball screw therebetween to rotatably support the end of the ball screw. The method of claim 1, A sensing unit provided around the plate to sense a relative alignment position of the plate with respect to the blanket roll; And And a control unit for controlling the movement of the plate alignment unit based on the signal of the detection unit. The method of claim 8, A moving rotary part coupled to both sides of the blanket roll and configured to move and rotate the blanket roll to an upper surface of the plate; And And a pair of gantry portions coupled to the moving rotary part to move to an upper surface of the plate together with the moving rotary part. The sensing unit is provided in each of the pair of gantry, the printing apparatus, characterized in that coupled to the gantry to move along the longitudinal direction of the gantry. 10. The method of claim 9, And the sensing unit is an alignment photographing camera which photographs an alignment mark displayed at four corner regions of the upper surface of the plate and transmits the photographed image information to the controller. The method of claim 2, A height adjusting part coupled to the plate supporting part to adjust a height of the plate supporting part including the plate; And And a probe unit provided around the height adjusting part to measure a lifting height of the plate support part. The method of claim 1, And a stage supporter provided in the lower region of the work stage with the stage alignment unit therebetween to support the stage alignment unit. The method of claim 12, The stage alignment unit, And a four stage moving support part disposed between the work stage and the stage support part provided in a shape corresponding to each other, and provided in four corner regions of the work stage and the stage support part. The method of claim 13, Each of the four stage moving supports, motor; A ball screw coupled to the motor and rotatable in a forward and reverse direction by the motor; A moving block coupled to the ball screw and movable along the longitudinal direction of the ball screw when the ball screw rotates; An intersecting block coupled to an upper end of the moving block and freely moving in a direction crossing the moving block; A fixed block having both ends fixed to an upper surface of the cross block and a lower surface of the work stage, respectively; And And a guide rail provided on an upper surface of the stage support to guide the movement of the movable block. The method of claim 1, An application unit provided to be movable above the plate to apply the color resist to the surface of the plate; And The blade unit is provided adjacent to the coating unit, and further spreads the color resist coated by the coating unit to the entire area of the surface of the plate and then removes the color resist diffused on the remaining surface except the pattern portion. A printing apparatus comprising a. The method of claim 15, The blade unit, A blade body coupled to the application unit; A diffusion blade coupled to the blade body and configured to diffuse the color resist applied on the plate to a front surface of the plate while being spaced apart from an upper portion of the plate; And And a removal blade coupled to the blade body and removing the color resist diffused in an unnecessary portion of the color resist diffused on the front surface of the upper portion of the plate. The method of claim 16, The blade body portion, A diffusion blade body coupled to one side of the application unit and to which the diffusion blade is coupled; And And a removal blade body coupled to the other side of the coating unit and to which the removal blade is coupled. The method of claim 16, The diffusion blade, A knife holder rotatably coupled to the movable block, and having a knife mounted at a tip thereof to diffuse the color resist applied to the plate; And It includes a holder rotating drive for generating a driving force for rotating the knife holder relative to the moving block, The removal blade, A knife holder rotatably coupled to the movable block, and having a knife mounted at a front end thereof to remove a color resist diffused in an unnecessary portion of the color resist diffused on a front surface of the upper portion of the plate; And And a holder rotating drive unit for generating a driving force for rotating the knife holder with respect to the block. The method of claim 1, The plate may be configured to form a predetermined pattern on the outer surface of the blanket roll by removing an inversion pattern from a gravure plate transferring the color resist of the predetermined pattern to the blanket roll and the color resist diffused on the outer surface of the blanket roll. The printing apparatus, characterized in that any one of the reverse pattern plate.

Images