KR100833116B1 - Printer and Printing Method - Google Patents

Abstract

A printing apparatus and a printing method are disclosed. The printing apparatus of the present invention comprises: a work stage for supporting a substrate for printing on at least one of a pattern of substantially R (Red), G (Green), and B (Blue) patterns on the substrate; And R (Red), G (Green), provided to be movable to the work stage, to adjust the height of at least one of R (Red), G (Green), and B (Blue) patterns printed on the substrate. , At least one of the B (Blue) patterns is characterized in that it comprises a press roll for pressing the printed substrate. According to the present invention, it is possible to adjust the height of the R, G, B pattern printed on the substrate to maintain a uniform thickness of the R, G, B pattern printed on the substrate, thereby realizing excellent print quality.

Printing apparatus, press roll, pressurization, R, G, B pattern, color resist, work stage

Description

Printing apparatus and printing method {Printer and Printing Method}

1A and 1B are diagrams illustrating 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 a schematic perspective view of the vicinity of a press roll provided in the printing apparatus of FIG.

4 is a side view for explaining an installation state of a press roll provided in the printing apparatus of FIG.

FIG. 5 is a perspective view in one direction of a press roll provided in the printing apparatus of FIG. 2.

6 is a perspective view in the other direction of the press roll of FIG. 2.

7 is a side view of the press roll of FIG. 2.

8 is a view for explaining a state in which the detachable unit is mounted on the press roll of FIG.

9 is an enlarged view of FIG. 8.

10 is a view for explaining the shape before and the pressing of the R, G, B pattern printed on the substrate.

11 is a schematic flowchart of a printing method according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

     1 printing apparatus 3 color resist

     3: gravure roll 10: dispenser

     20: doctor blade 30: blanket roll

     40: work stage 50: work table

     60: lower base 70: press roll

     71: roll support portion 77: alignment detection portion

     78: vacuum suction transfer unit 80: press roll body

     81: pressure sheet 87: elevating drive unit

     88: rotation drive unit 130: detachable unit

     132: first removable plate 134: second removable plate

     140: tension adjustment unit 150: linear guide

     170: connecting plate

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus and a printing method, and more particularly, to a printing apparatus and a printing method capable of uniformly maintaining the thicknesses of R, G, and B patterns printed on a substrate as a work object.

Recently, the flat panel display (FPD) has begun to emerge as the electronic display industry is rapidly developing among the semiconductor industries. A flat panel display is widely used as a display device of a TV, a computer monitor, or a device such as a mobile phone, a PDA, or a digital camera. Types of flat panel displays include liquid crystal displays (LCDs), plasma display panels (PDPs), and organic light emitting diodes (OLEDs).

Generally, a color filter layer is formed in a flat panel display to implement color. A color filter in which a black matrix is formed to prevent deterioration of image quality of a display device due to light leakage to an area other than an image display area is provided. It is provided.

A typical flat panel display having such a color filter is the LCD described above. The LCD includes a thin film transistor (TFT) 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 illustrated in FIGS. 1A and 1B, pixels having a pigment of R (Red), G (Green), and B (Blue) patterns are typically 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 such that R, G, and B patterns are arranged in the same column, respectively (RGB Vertical Stripe), or in FIG. 1B. As shown, R, G, and B patterns may be repeatedly arranged in the same row (Mosaic). The difference in resolution can be realized in various ways according to the arrangement of the R, G, and B patterns.

Such a color filter layer can be produced by various methods, for example, a dyeing method, a printing method, an adhesive method, a pigment dispersion method and the like. STN (Super Twisted Nematic) LCD, which is one of the conventional passive matrix methods, mainly produces color filter layers by dyeing, printing, and adhesive methods, but it is an active matrix method that has excellent elaboration, good reproducibility, and is applicable to large-area liquid crystals. In TFT (Thin Film Transistor) LCD, pigment dispersion method is mainly used.

In the pigment dispersion method, a color filter layer is manufactured by forming a pattern of photosensitive color resists by a general photolithography process. That is, the color filter layer is completed by applying a photosensitive color resist on a substrate, irradiating light using a mask, and then applying a developer to form a desired pattern.

As such, a photo process is required to form a color filter by the pigment dispersion method, and this photo process causes a problem that the process is not only complicated but also expensive to manufacture. Furthermore, the process is further complicated since the photo process must be repeated three times in order to form pixels corresponding to the dyes of the R, G, and B patterns.

Recently, a method of using the printing method in the TFT LCD field has been proposed to overcome the problems of the pigment dispersion method.

The printing method has a gravure filled with color resist and a corresponding roll to form a color resist pattern of the corresponding dye on the substrate by the action of a roll, and then another color color resist by another roll. To form sequentially.

That is, after applying the R, G, B color resist (color ink, color pigment) on the outer surface of the so-called gravure roll or gravure plate, the blanket roll is applied to the gravure roll or gravure. After contacting the outer surface of the plate to transfer the R, G, B color resist from the gravure roll or the gravure plate, R, G, B patterns are formed on the substrate by the action of the blanket roll.

If such a printing method can be put to practical use, the process of manufacturing a color filter layer by printing R, G, and B patterns on a substrate may be more effectively performed. However, an apparatus capable of manufacturing a color filter layer using such a printing method (hereinafter, ' Printing device 'has not been put to practical use. Therefore, research and development on such a printing device is actively underway.

Applicants remove gravure rolls, blanket rolls, dispensers for applying R, G, and B color resists to the outer surface of the gravure roll, and color resists applied to the outer surface of the gravure roll. And a printing device including a doctor blade and a work stage on which a substrate, which is a workpiece, is mounted.

With this configuration, after the dispenser applies the color resist to the outer surface of the gravure roll and removes the unnecessary color resist by the doctor blade, the color resist is transferred from the gravure roll to the blanket roll and then supported from the blanket roll to the work stage again. The color resist is re-transferred onto the substrate.

In this case, color recesses, or inks, may be uniformly filled in the grooves, that is, the pixel areas of the substrate, to achieve desired print quality.

By the way, in the printing apparatus currently being researched and developed, when the R, G, B pattern is printed on the substrate which is the work object, the height of the color resist printed on the substrate, that is, the R, G, B pattern, is desired. It may be formed to be thicker than the height of, and the problem that the filling degree of the R, G, B pattern may vary slightly in each pixel region of the substrate.

As such, if the heights of the R, G, and B patterns are not uniformly maintained at the desired height, the quality of the product may be degraded. Therefore, the height of the R, G, and B patterns printed on the substrate may be uniformly matched. This is necessary.

Therefore, an object of the present invention, it is possible to adjust the height of the R, G, B pattern printed on the substrate to maintain a uniform thickness of the R, G, B pattern printed on the substrate, and thus to implement excellent print quality It is to provide a printing apparatus and a printing method that can be.

The object is, according to the present invention, a work stage for supporting a substrate for a printing operation on at least one of a substantially R (Red), G (Green), and B (Blue) pattern for the substrate. ); And R (Red), G, which is provided to be movable to the work stage, to adjust the height of at least one of R (Red), G (Green), and B (Blue) patterns printed on the substrate. At least one of the green and blue patterns is achieved by a printing apparatus comprising a press roll for pressing the printed substrate.

Here, a blanket roll (Blank roll) is further included in contact with the surface of the substrate for press printing for the printing operation, the press roll is a substrate printed with all R (Red), G (Green), B (Blue) pattern It is preferable to pressurize.

The press roll may include a press roll body rotatably provided at an upper portion of the substrate; And it may include a detachable unit for attaching and detaching the press sheet provided on the outer periphery of the press roll body to the press roll body.

And a work table that floats the substrate for transfer to the work stage, wherein the press roll is coupled to the press roll body in a relative rotatable manner and moves between the work stage and the work table. A roll support coupled to the lower base to enable it; An elevating driver for elevating the press roll body with respect to the substrate; And it may further comprise a rotation drive for rotating the press roll body relative to the roll support.

It is preferable to further include a vacuum suction transfer unit which is provided in the roll support unit and grips the substrate on the work table by vacuum suction force and transfers the substrate to the work stage.

The roll supporting unit may further include at least one alignment sensing unit for acquiring image information regarding the position of the substrate.

The roll supporting unit includes a pair of both end bodies coupled to the rail unit installed on the lower base in both side portions of the lower base so as to be slidable; An axial center coupling part provided on each of the pair of end bodies, the axial center of the press roll body being coupled; And It is preferable to have a connecting portion for connecting the pair of both ends of the body.

The press sheet is preferably made of a PS (Presensitized Plate) plate.

The press roll may further include at least one tension adjusting unit for adjusting the tension in the circumferential direction of the press roll body of the press sheet.

The detachable unit may include a first detachable plate coupled to one end of the press sheet and detachably attached to the press roll body; And a second detachable plate coupled to the other end of the press sheet and detachably provided to the press roll body.

The second detachable plate may be slidably provided along the outer circumference of the press roll body, and the tension adjusting unit may adjust the tension of the press sheet by sliding the second detachable plate along the outer circumference of the press roll body. have.

The tension adjusting unit may include a fixed end fixedly coupled to an outer circumference of the press roll body positioned between the first detachable plate and the second detachable plate; A free end coupled to the second detachable plate and slidably provided along the outer circumference of the press roll body together with the second detachable plate; And a distance adjusting end that interconnects the fixed end and the free end to adjust the distance between the fixed end and the free end.

The press roll body is provided in a shape in which a portion adjacent to the tension control unit is partially cut, wherein the press roll is at least one to allow the second detachable plate to be maintained at a distance from a partially cut outer periphery of the press roll body. It may further include a linear guide.

In addition, the above object is, according to the present invention, a work stage for supporting the substrate for the printing operation on at least one of the pattern of the actual R (Red), G (Green), B (Blue) pattern ( transferring the substrate to a work stage; Printing at least one of R (Red), G (Green), and B (Blue) patterns on the substrate; And among the R (Red), G (Green), and B (Blue) patterns to adjust the height of at least one of the R (Red), G (Green), and B (Blue) patterns printed on the substrate. It is also achieved by a printing method characterized in that it comprises pressing a substrate on which at least one pattern is printed.

Here, in the pressing of the substrate, it is preferable to pressurize a substrate on which all of R (Red), G (Green), and B (Blue) patterns are printed.

Pressing the substrate may include transferring a press roll to an upper surface of the substrate; Aligning the substrate with respect to the press roll; And pressing the substrate with the press roll.

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.

2 is a schematic structural diagram of a printing apparatus according to an embodiment of the present invention, Figure 3 is a schematic perspective view of the vicinity of the press roll provided in the printing apparatus of Figure 2, Figure 4 is provided in the printing apparatus of Figure 2 It is a side view for demonstrating the installation state of a press roll, FIG. 5 is a perspective view in one direction of the press roll with which the printing apparatus of FIG. 2 was equipped, FIG. 6 is a perspective view in the other direction of the press roll of FIG. FIG. 7 is a side view of the press roll of FIG. 2, FIG. 8 is a view for explaining a state where a detachable unit is mounted on the press roll of FIG. 2, FIG. 9 is an enlarged view of FIG. 8, and FIG. 10 is printed on a substrate. Figure 11 is a view for explaining the shape before and after the pressing of the R, G, B pattern, Figure 11 is a schematic flowchart of a printing method according to an embodiment of the present invention.

As shown in these figures, the printing apparatus 1 according to an embodiment of the present invention, the gravure roll (5, Gravure Roll), the outer surface of the gravure roll (5) R, G, B color resist (color) Dispensers 10 for applying any of the color resists 3 selected from ink and color pigments, and color resists present in unneeded areas of the color resists 3 coated on the outer surface of the gravure roll 5 ( 3) Dr. blades 20 (Dr. Blade) for removing and transfer the R, G, B color resist (3) from the gravure roll (5) color filter substrate (hereinafter referred to as substrate (G)) Blanket Roll 30 for printing at least one of the R, G, B pattern on the surface of the substrate and at least any one of the R, G, B pattern for the substrate (G) Work stage 40 and the height of the R, G, B patterns printed on the substrate G supported by the work stage 40, that is, R, G, B In order to uniformly match the pattern thickness, the press roll 70 presses the surface of the substrate G, and the work table 50 moves the substrate G in the direction of the work stage 40. And a lower base 60 supporting them.

The gravure roll 5 serves to transfer any color resist 3 selected from R, G, and B color resists to the outer surface of the blanket roll 30. Thus, the gravure roll 5 and the blanket roll 30 have substantially similar volumes. The gravure roll 5 is rotatable in a corresponding position by a roll driving part (not shown) coupled to a pair of left and right support parts 61 fixed to the lower base 60 and standing upright. The gravure roll 5 may be directly coupled to the roll driving unit or may be coupled to the roll driving unit through a separate pocket (not shown). When the pocket is provided, not only the replacement work of the gravure roll 5 is easy, but there is an advantage that the eccentricity and the horizontal axis of the gravure roll 5 can be easily adjusted.

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

Therefore, the dispenser 10, which initially applies the color register 3 to the outer surface of the gravure roll 5 by the dispenser 10, only gravures any one of the color resists 3 selected from R, G, and B color resists. The outer surface of the roll 5 is applied. Expressed easily, the dispenser 10 applies only ink of one color selected from red, green and blue to the outer surface of the gravure roll 5.

Although not shown in detail, the outer surface of the gravure roll 5 is formed with a concave-convex pattern substantially covered (coated) with the color resist 3. The uneven pattern at this time may be both embossed or intaglio. In the embossed form, the color resist 3 is applied to the outer surface of the protruding convex-and-concave portion (not shown) and transferred to the blanket roll 30. In the engraved form, the color resist 3 is formed inside the recessed recess portion 5a. ) Is applied and transferred to the blanket roll 30.

However, the blanket roll 30 receives the color resist 3 from the outer surface of the gravure roll 5 and prints (retransfers) it on the substrate G to form R, G, and B shapes as shown in FIGS. 1A and 1B. In forming the pattern, 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 roll 5 has a negative shape.

Thus, when one of the color resists 3 selected from R, G, and B color resists is applied to the outer surface of the gravure roll 5 by the dispenser 10, as shown in the enlarged portion of FIG. The color resist 3 should be applied only to the recesses 5a of the form. However, when the dispenser 10 applies the color resist 3 to the outer surface of the gravure roll 5, it is difficult to apply the color resist selectively to only the recesses 5a of the intaglio form.

Therefore, when the dispenser 10 applies the color resist 3 to the outer surface of the gravure roll 5, the color resist 3 is spread out widely on all the outer surfaces of the gravure roll 5, and when the application is completed, the dispenser 10 By removing the unnecessary color resist 3 applied to the remaining surface 5b except for the recess portion 5a, the color resist 3 can finally be accommodated only inside the recess portion 5a. To this end, a doctor blade 20 is provided in the periphery of the gravure roll 5 to remove the color resist 3 which is not necessary.

The doctor blade 20 includes a knife holder 21 and a knife 22 coupled to the knife holder 21. The knife holder 21 has a structure that can be easily attached and detached at a predetermined position of the support portion 61 in a one-touch fashion. The knife 22 has a length substantially similar to the length of the gravure roll 5, and the outer surface of the gravure roll 5 in the state that the tip thereof is in contact with the outer surface of the gravure roll 5 (there is actually a slight gap). It is arranged to be inclined relative to the role of scratching the outer surface of the gravure roll (5).

In this way, since the tip of the knife 22 is in contact with the outer surface of the gravure roll 5, when the color resist 3 is applied to the outer surface of the rotating gravure roll 5, the recess 22 of the intaglio shape by the knife 22 The color resist 3 applied to the remaining surface 5b except for (5a) can be naturally removed. Therefore, finally, the color resist 3 can be accommodated only in the recess 5a.

As described above, the dispenser 10 serves to apply the color resist 3 to the outer surface of the gravure roll 5. The dispenser 10 is provided to be movable along the longitudinal direction of the gravure roll 5, as well as to be able to be lifted or folded in one direction at the corresponding position. Therefore, the coating efficiency of the color resist 3 can be improved, and the interference with the surrounding structure can be avoided.

Meanwhile, the blanket roll 30 receives the color resist 3 applied in the recess 5a formed on the outer surface of the gravure roll 5 and then moves to the work stage 40 to transfer the substrate G to the substrate G. It serves to substantially print the R, G, B pattern as shown in Figs. 1A and 1B.

On the outer surface of the blanket roll 30, a sheet (not shown) in which the color resist 3 is transferred from the gravure roll 5 is wound. Of course, the sheet used more than the number of times the appropriate limit has to be replaced, so the blanket roll 30 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 sheet can be easily replaced, while the sheet is unfolded and stretched and wound on the outer surface of the blanket roll 30.

The blanket roll 30 must be accessible and spaced apart from the gravure roll 5 as well as able to rotate on the top surface of the substrate G loaded on the work stage 40. To this end, on both sides of the blanket roll 30, in addition to moving the blanket roll 30 in a linear direction in accordance with the operation of the rail (not shown) installed on the side of the lower base 60, the blanket roll 30 in the corresponding position A driving part (not shown) which rotates () is provided. At this time, the structure for moving the blanket roll 30 by the driving unit may be applied to linear motion (Linear motion), etc. capable of precise control.

The work stage 40 is a place where the printing operation of the R, G, and B patterns on the substrate G proceeds, and the work table 50 plays a role of transferring the substrate G to the work stage 40. . In recent years, since the process operation using the 8th generation board | substrate G whose width | variety and the width | variety of a width | variety and a longitudinal are 2 or more progresses, it is difficult to convey the board | substrate G by a simple adsorption method. Therefore, as an alternative, a method of transporting the substrate G after floating the substrate G is under study. This transfer method is applied to the work table 50.

On the other hand, after completing the printing of the R, G, B pattern of the substrate G on the work stage 40 by such a configuration, the thickness of the R, G, B pattern printed on the substrate G must be kept uniform. do. This will be described in more detail with reference to Figure 10 for, by a blanket roll (30) R, G, the cross sectional shape of the substrate printing is complete, the B pattern is '①', such as R, G, the height of the B pattern (H ₁ ) May not only be formed thicker than the required height (H ₂ of '②'), but may not be uniformly maintained at a desired height. Therefore, by pressing the R, G, B pattern of the substrate G with the above-described press roll 70 to maintain the shape of the R, G, B pattern at a uniform height (H ₂ ), such as '②' excellent print quality Can be implemented.

Therefore, the printing apparatus 1 of the present embodiment is movably coupled to the lower base 60 so as to move between the work table 50 and the work stage 40, and the surface of the substrate G, that is, R, G, The press roll 70 which can press the B pattern is provided.

As shown in FIG. 3, the press roll 70 according to the present embodiment includes a roll supporting part 71 and an R, G, and B pattern printed on the substrate G to maintain a predetermined thickness. The press roll body 80 for pressing the R, G, and B patterns, the elevating driving part 87 for raising and lowering the press roll body 80 with respect to the substrate G, which is a work object, and the roll support part 71. A rotation drive unit 88 for axially rotating the press roll body 80 and a detachable unit 130 for attaching and detaching the press sheet 81 provided on the outer circumference of the press roll body 80 to the press roll body 80. Equipped.

The roll support part 71 of the present embodiment moves in the longitudinal direction of the lower base 60 while supporting or coupling various components provided in the press roll 70. The roll support part 71 is coupled to the rail part 63 of the lower base 60 at both sides of the lower base 60 so as to move a pair of both end bodies 72 to move the entire press roll body 80 to a predetermined position. ), A pair of connecting portions 73 connecting the both ends of the body 72, and an axial center coupling portion 74 to which the shaft center of the press roll body 80 is coupled.

The lower end of both ends of the body 72 is coupled to the rail portion 63 provided in the lower base 60, so that the press roll 70 is in the longitudinal direction of the lower base 60, that is, the work table 50 and the work stage 40. Sliding movement between the linear motion (Linear motion) state. Since the sliding movement is made by a linear driving unit such as a linear motor mounted on the lower base 60, precise control is possible, and thus, the press roll body 80 coupled to the roll support 71 is You can move exactly to the desired horizontal position

Each connecting portion 73 is connected to both ends of the body 72 from the side. As will be described in detail later, in the connection portion 73, an alignment position for aligning the substrate G before pressing the substrate G on which the R, G, and B patterns are printed by the press roll body 80 is pressed. An alignment sensing unit 77, ie, an alignment camera 77, and a vacuum suction transfer unit 78 for transferring the substrate G from the work table 50 to the work stage 40 are provided. In addition to improving the efficiency of the workspace, the tact time can be reduced. These will be described later in detail.

The shaft coupling portion 74 is a portion to which the shaft cores 76 formed at both ends of the press roll body 80 are coupled, and the horizontal axis of the press roll body 80 as well as the eccentricity of the press roll body 80 are adjusted. Position control unit (not shown) for precisely controlling the R, G, B pattern formed on the front surface of the substrate (G) so that a uniform pressure can be applied.

On the other hand, the press roll body 80 is supported by the shaft core 76 is coupled to the shaft center engaging portion 74 of the roll support portion 71, by pressing the R, G, B pattern printed on the substrate (G) Ensure that the R, G, and B patterns are kept at a uniform thickness. The press sheet 81 is wound around this press roll body 80. The press sheet 81 is a portion in direct contact with the R, G, and B patterns when the press roll body 80 presses the substrate G, and the press roll body 80 is wound around the press roll body 80. With the rotation of), the R, G, and B patterns are directly pressed. However, since the pressing sheet 81 is used only for pressing and the R, G, and B patterns formed on the substrate G after pressing should not be buried in the pressing sheet 81, the pressing sheet 81 is formed of a PS plate for this purpose. do.

PS plate (Presensitized Plate) is a metal plate, because it is a flexible plate can be easily wound on the press roll body (80). Since the PS plate is coated with a material such as a photosensitive agent in advance, a process such as application or corrosion of the photosensitive agent is omitted and can be easily plated. Since the PS plate is a metal plate having a predetermined surface hardness, The formed R, G, and B patterns can be uniformly pressed. However, in the present embodiment has been described above to form the pressure sheet 81 from the PS plate, but the scope of the present invention is not limited thereto, and silicon coated polyethylene terephthalate (PET) film may be used.

The press roll body 80 has a shape that is partially cut in the longitudinal direction, as shown in detail in FIG. 8, so that the press sheet 81 can be wound or unwound on its outer circumferential surface, and the press roll body in this cut portion Detachable unit 130 for winding or unwinding the pressing sheet 81 is coupled to 80.

As shown in FIGS. 5 to 9, the detachable unit 130 may include a first detachable plate 132 and a second detachable plate 134 to detach the press sheet 81 to the press roll body 80. It is provided. One end of the press sheet 81 is coupled to the first detachable plate 132, and the other end of the press sheet 81 is coupled to the second detachable plate 134, and the first detachable plate 132 and the second detachable plate ( As the 134 is attached to the press roll body 80, the press sheet 81 may be attached to the press roll body 80.

At this time, in order to couple between the first and second detachable plates 132 and 134 and the pressure sheet 81, one end of the first and second detachable plates 132 and 134 is provided with the pressure sheet coupling ends 132a and 134a. Prepared. Each of the pressing sheet coupling ends 132a and 134a includes lower compression plates 132e and 134e and upper compression plates 132d and 134d provided to be screwed with the lower compression plates 132e and 134e. Thus, one end of the pressing sheet 81 can be inserted between the lower pressing plates 132e and 134e and the upper pressing plates 132d and 134d, and the lower pressing plates 132e and 134e and the upper pressing plates 132d and By pressing 134d) with a coupling screw, the pressing sheet 81 may be coupled to the pressing sheet coupling ends 132a and 134a.

As described above, in the present embodiment, the pressure sheet 81 is provided with the pressure sheet coupling ends 132a and 134a inserted into the first and second detachable plates 132 and 134 and tightened by a coupling screw. ) Is coupled to the first and second detachable plates 132 and 134, but the rights of the present invention are not limited thereto, and the pressure sheet 81 is easily attached to the first and second detachable plates 132 and 134. Any configuration can be adopted as long as it can be combined and separated.

The first and second detachable plates 132 and 134 are provided with a plurality of detachable holes 132c and 134c for detachable attachment to the press roll body 80. 8 and 9, a plurality of first detachable protrusions 112 protruding from the press roll body 80 are inserted into the plurality of first detachable holes 132c formed in the first detachable plate 132. The plurality of second detachable protrusions 172 protruding from the connecting plate 170 are inserted into the plurality of first detachable holes 132c. At one end of the first and second detachable protrusions 112 and 172, protrusions 112a and 172a for firmly engaging the first and second detachable plates 132 and 134 are protruded.

As such, the press sheet 81 is easily and quickly replaced by attaching and detaching the press sheet 81 to the outer circumference of the press roll body 80 via the first and second detachable plates 132 and 134. Can be. That is, the first and second detachable plates 132 and 134 can be placed on a flat work surface and the pressure sheet 81 can be coupled to the first and second detachable plates 134, so that the joining operation can be performed quickly and accurately. Will be.

Meanwhile, the detachable unit 130, that is, the first and second detachable plates 132 and 134 are provided with a tension adjusting unit 140 for adjusting the tension of the pressing sheet 81. Accordingly, as shown in FIG. 9, the tension adjusting unit 140 has a fixed end 141 fixedly coupled to the outer circumference of the press roll body 80, and a free end sliding along the outer circumference of the press roll body 80. 142 and a distance adjusting end 143 for adjusting the distance between the fixed end 141 and the free end 142.

The fixed end 141 is fixedly coupled to the press roll body 80 between the first detachable plate 132 and the second detachable plate 134.

The free end 142 is provided to be slidable along the outer circumference of the press roll body 80, and the second detachable plate 134 to which the pressure sheet 81 is coupled is connected to the free end 142 to form a press roll body ( Slid along the outer periphery of 80). Accordingly, the free end 142 is a second detachable plate inserted into the second detachable protrusion 172 protruding from the connecting plate 170 via the connecting plate 170 coupled to the lower end of the free end 142 ( 134).

The distance adjusting end 143 interconnects the fixed end 141 and the free end 142 by screwing, and adjusts the distance between the fixed end 141 and the free end 142. Thus, the distance adjusting end 143 is coupled to the fixed end 141, the fixed end connecting body 144, the thread formed on the outer periphery, and the free end connecting body coupled to the free end 142 and formed on the outer periphery ( 146 and a movable body 145 for adjusting the distance between the fixed end 141 and the free end 142 in accordance with the rotation.

Referring to the distance control end 143 having such a configuration in more detail, both ends of the movable body 145 is screwed with the fixed end connection body 144 and the free end connection body 146, respectively, fixed end connection body 144 and the free end connection body 146 is formed with a thread in the opposite direction, and thus, when the movable body 145 is rotated clockwise or counterclockwise, the fixed end connection body 144 is fixed end 141 It is fixed to the free end connection body 146 is to have a movement in the circumferential direction of the press roll body (80). As a result, the free end 142 fixedly coupled to the free end connecting body 146 is also movable along the outer circumference of the press roll body 80, and as a result, between the fixed end 141 and the free end 142. The distance is adjusted. Accordingly, the tension of the pressing sheet 81 may be adjusted through the second detachable plate 134 coupled to the free end 142.

On the outer circumference of the free end connection body 146 is provided a nut 147 for preventing loosening. When the distance adjustment between the fixed end 141 and the free end 142 is completed, the movable body 145 and the fixed end connection body 144 by rotating the screw loosening prevention nut 147 to closely contact the movable body 145. ) And the free end connecting body 146 can be prevented from loosening the screw.

In addition, the detachable unit 130 is provided with a liner guide 150 such that the second detachable plate 134 provided on the press roll body 80 maintains a predetermined distance with respect to the outer circumference of the press roll body 80. . The linear guide 150 is coupled to the free end 142 by being coupled to the free end 142 connected to the fixed end connecting body 144 to suppress the movement toward the press roll body 80 of the free end 142. 2 detachable plate 134 to maintain a predetermined interval with respect to the outer circumference of the press roll body (80).

Accordingly, the linear guide 150 includes a rail 153 provided on the outer circumference of the press roll body 80, and a slider 152 coupled to the rail 153 so as to slide along the rail 153. Here, the slider 152 is coupled to the slider body 151, the slider body 151 is coupled to the free end 141 of the tension control unit 140. Through this, the free end 142 connected to the slider 152 and the second detachable plate 134 connected to the free end 142 are both constrained by the slider 152 to face the press roll body 80. You can't have movement. Therefore, the second detachable plate 134 maintains a predetermined distance (C) with respect to the outer circumference of the press roll body 80, and thus, the process of attaching the press sheet 81 to the press roll body 80 It is made stable and precisely, and after the attachment of the pressing sheet 81 is completed, it is possible to prevent relative movement of the press sheet 81 with respect to the outer circumference of the press roll body 80 during the pressing process.

In addition, the linear guide 150 includes a spring holder 154 provided on an outer circumference of the press roll body 80, and a spring 155 coupled to the spring holder 154 and the slider body 151. The spring 155 is provided to facilitate the process of attaching and detaching the second detachable plate 134 from the connecting plate 170. The spring 155 is upwardly disposed along the outer circumference of the spring roll body 80 on the second detachable plate 134. By applying a force to the spring 155 provides a force in the reverse direction to the connecting plate 170, the coupling of the second removable plate 134 and the connecting plate 170 is easily dismantled.

In this way, by the detachable unit 130 having such a configuration, excessive tension is prevented from being applied to the pressure sheet 81 to prevent the pressure sheet 81 from being damaged, and the pressure sheet 81 is It is possible to maintain a taut state without being lifted from the outer surface of the press roll body 80.

On the other hand, the press roll 70 is provided with a raising and lowering driving unit 87 so that the press roll body 80 can approach (fall) and space (raise) the substrate G on which the R, G, and B patterns are formed. . Therefore, as described above, the press roll 70 can move to a desired horizontal position by the linear driver provided in the lower base 60, and can also approach the upper surface of the substrate G by the elevating drive 87. The pressure may be performed on the substrate G. At this time, the press roll 70 is moved in a linear motion state by the elevating driving unit 87 to prevent particles from falling on the substrate G during the elevating operation. Precise pressurization on G) can be carried out.

And the press roll 70 is provided with the rotation drive part 88 so that the press roll body 80 may rotate and press on the upper surface of the board | substrate G in which R, G, and B patterns were formed. When the press roll 70 pressurizes the substrate G, the press roll body 80 must rotate, as well as the press roll in the longitudinal direction of the lower base 60, that is, in the longitudinal direction of the substrate G. 70) The whole must move. Therefore, it is necessary to confirm whether or not the substrate G is supported at the correct alignment position of the work stage 40 before pressing the substrate G. In the printing (retransition) process of the R, G, and B patterns by the blanket roll 30 which is usually performed before the pressurizing operation, the substrate G is separated from the alignment position due to the pressure of the blanket roll 30. As a result, alignment with respect to the substrate G must proceed again. To this end, as outlined above, two alignment sensing units 77, namely, two connection sensing units 77 are connected to the connection unit 73 facing the work stage 40, among the connection units 73 connecting the two end bodies 72 of the roll support unit 71. The alignment camera 77 is installed.

The alignment camera 77 photographs eye marks (not shown) displayed on the vertex region of the substrate G above the work stage 40 and then transfers the captured image information to the controller (not shown). send. In the present embodiment, the alignment camera 77 is applied to the alignment detecting unit 77, but the present invention is not limited thereto.

For reference, since the alignment position information of the substrate G is previously input to the controller, when the alignment camera 77 photographs the eye mark formed on the substrate G at the corresponding position, the image information is sent to the controller. The controller may compare these values to determine how far the substrate G, which is the workpiece, is deviated from the alignment position. When the degree of departure of the substrate G is calculated, the substrate G is aligned with respect to the press roll 70 by moving the work stage 40 in the X, Y and θ axis directions.

Meanwhile, as shown in FIGS. 3 and 4, the vacuum suction transfer unit 78 may be mounted on both connection portions 73 of the roll support part 71. The vacuum suction transfer unit 78 serves to transfer the substrate G from the work table 50 to the work stage 40 using the vacuum suction force. Usually, a transport robot (not shown) for transporting the substrate G may be provided around the substrate G to transfer the substrate G on the work table 50 to the work stage 40. By mounting the vacuum suction transfer unit 78, which performs substantially the same role as the press roll 70, the working space can be used more efficiently, and the effect of shortening the tact time required for the work can be reduced. have.

As such, according to the present exemplary embodiment, the R, G, and B patterns formed on the substrate G may be pressed to a predetermined thickness by the press roll 70 to maintain a uniform thickness. That is, as shown in '②' of FIG. 10, the thickness H ₂ of the R, G, and B patterns printed on the substrate G by the press roll 70 of the present embodiment may be maintained at a desired thickness. have.

In addition, since the printing apparatus 1 having such a configuration can perform a series of processes from the printing work to the pressurizing work, and does not require a separate press device, not only can the work space be efficiently used. There is an effect that can reduce the tact time required for work.

Hereinafter, with reference to FIGS. 2 to 11, the operation and printing method of the printing apparatus 1 according to an embodiment of the present invention having such a configuration will be described.

First, the substrate G, which is the workpiece, is transferred to the work stage 40 through the work table 50 before applying the color resist 3 selected from the R, G, and B color resists to the gravure roll 5. Let's do it. At this time, the substrate (G) in the work table 50 can be transferred to the work stage 40 by a separate transport robot (not shown), but in this embodiment, the roll supporting portion 71 of the press roll 70 Vacuum suction transfer unit 78 coupled to the vacuum suction transfer unit 78, the substrate (G) on the work table 50, the vacuum suction transfer unit to move to the work stage 40 in the state that the substrate G is vacuum suction The substrate G held by the 78 is placed on the work stage 40. When the substrate G is supported by the work stage 40, the press roll 70 returns to its original position.

Thereafter, during the alignment process of the substrate G in the work stage 40, a process of applying one of the color resists 3 selected from the R, G, and B color resists to the gravure roll 5 is performed. Will proceed. In this case, in order to shorten the tact time required for the operation, the substrate G may be transported and seated on the work stage 50, and the operation of applying the color resist 3 to the gravure roll 5 may be performed. You can do it at the same time.

Thereafter, the color resist 3 applied to the outer surface of the gravure roll 5 is filled in the recess 5a of the gravure roll 5 while the gravure roll 5 is rotated about a predetermined rotation axis (not shown). However, the color resist 3 diffused by the doctor blade 20 on the remaining surface 5b except for the recess 5a of the gravure roll 5 is removed.

When the application of the color resist 3 to the gravure roll 5 is completed, the blanket roll 30 moves in the direction of the gravure roll 5 by the operation of a rail part (not shown) provided in the lower base 60. In addition, the blanket roll 30 and the gravure roll 5 are in contact with each other and rotate in opposite directions to transfer the color resist of the gravure roll 5 to the blanket roll 30.

The blanket roll 30 transferred from the color resist 3 moves to an upper portion of the substrate G on which the substrate G, which is a workpiece, is supported, and then transfers the color resist 3 transferred from the gravure roll 5 to the substrate. Retransmission, that is, printing (G) (S10).

When the R, G, and B patterns are all printed on the substrate by such a printing operation, the cross-sectional shape of the substrate G on which the R, G, and B patterns are printed is formed to be thicker than a desired thickness as shown in '①' of FIG. It may be and also may be formed non-uniformly.

Therefore, the press roll 70 for pressing the R, G, and B patterns printed on the substrate G to a predetermined thickness H ₂ , as shown in '②' of FIG. 10, moves in the direction of the work stage 40 (S20). ). Then, the two alignment cameras 77 mounted on the roll support part 71 capture eye marks (not shown) displayed near the vertices of the substrate G to obtain position information of the substrate G, and then press roll ( 70 is performed to align the substrate (G) with respect to (S30).

After the alignment work of the substrate G is completed, the press roll body 80 is lowered from the upper surface of the substrate G to a predetermined height position by the elevating driving unit 87, and rotated by the rotation driving unit 88. The pressing operation on the substrate G is performed (S40). As a result, uniform pressure is applied to the entire surface of the substrate G, that is, the R, G, and B patterns.

When the pressing operation is completed, the press roll body 80 is elevated to the original height, and returns to the initial position (S50). By this process, the printing and pressing operations of the R, G, and B patterns on the substrate G are completed.

As described above, according to the present exemplary embodiment, the R, G, and B patterns printed on the substrate G are uniform by the press roll 70 installed to be movable in the longitudinal direction of the lower base 60 instead of a separate working space. Pressurization to a thickness, and at the same time can also transfer the substrate (G) to improve the efficiency of the work as well as to reduce the tact time (tact time) required for the pressing operation.

In the above-described embodiment, the alignment detection unit such as an alignment camera acquires image information about the alignment position for alignment of the substrate, but the alignment detection unit may be an alignment detection unit using infrared rays or the like. .

In addition, in the above-described embodiment, the press roll grips the substrate on the work table by the vacuum suction force and transfers it to the work stage. However, the substrate may be transferred by a separate transfer robot.

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. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

As described above, according to the present invention, it is possible to adjust the height of the R, G, B pattern printed on the substrate to maintain a uniform thickness of the R, G, B pattern printed on the substrate, thus excellent print quality Can be implemented.

Claims (16)

A work stage for supporting the substrate for printing on at least one of a substantially R (Red), G (Green), and B (Blue) pattern for the substrate; A blanket roll for contact pressing the surface of the substrate for the printing operation; And It is provided to be movable to the work stage, and in order to adjust the height of at least one of the R (Red), G (Green), B (Blue) pattern printed on the substrate R (Red), G ( Green), B (Blue) printing apparatus characterized in that it comprises a press roll (Press roll) for pressing the substrate on which the pattern is printed. The method of claim 1, The press roll is a printing apparatus, characterized in that for pressing the substrate on which the R (Red), G (Green), B (Blue) pattern is printed. The method of claim 1, The press roll is, A press roll body rotatably provided at an upper portion of the substrate; And And a detachable unit for attaching and detaching the press sheet provided on the outer circumference of the press roll body to the press roll body. The method of claim 3, A work table which floats the substrate for transfer to the work stage, The press roll is, A roll support part coupled to the press roll body so as to be relatively rotatable and coupled to a lower base to move between the work stage and the work table; An elevating driver for elevating the press roll body with respect to the substrate; And And a rotation drive unit for rotating the press roll body with respect to the roll support unit. The method of claim 4, wherein And a vacuum suction transfer unit installed on the roll support unit and holding the substrate on the work table by a vacuum suction force and transferring the substrate to the work stage. The method of claim 4, wherein And at least one alignment sensing unit installed in the roll supporting unit and acquiring image information regarding the position of the substrate. The method of claim 4, wherein The roll support portion, A pair of both end bodies coupled to the rail parts installed on the lower base at both side portions of the lower base to be slidable; An axial center coupling part provided on each of the pair of end bodies, the axial center of the press roll body being coupled; And And a connecting portion for connecting the pair of both ends of the body. The method of claim 3, The press sheet is a printing device, characterized in that made of PS (Presensitized Plate) plate. The method of claim 3, The press roll is, And at least one tension adjusting unit for adjusting the tension in the outer circumferential direction of the press roll body of the press sheet. The method of claim 9, The detachable unit, A first detachable plate coupled to one end of the press sheet and detachably attached to the press roll body; And And a second detachable plate coupled to the other end of the press sheet and detachably attached to the press roll body. The method of claim 10, The second detachable plate is provided to be slidable along the outer circumference of the press roll body, And the tension adjusting unit adjusts the tension of the pressure sheet by sliding the second detachable plate along the outer circumference of the press roll body. The method of claim 11, The tension control unit, A fixed end fixedly coupled to an outer circumference of the press roll body positioned between the first detachable plate and the second detachable plate; A free end coupled to the second detachable plate and slidably provided along the outer circumference of the press roll body together with the second detachable plate; And And a distance adjusting end that connects the fixed end and the free end to adjust a distance between the fixed end and the free end. The method of claim 12, The press roll body is provided in a shape in which a portion adjacent to the tension control unit is partially cut out, The press roll is, And at least one linear guide for maintaining the second detachable plate at a predetermined distance from the partially cut outer periphery of the press roll body. Transferring the substrate to a work stage that supports the substrate for printing on at least one of a substantially R (Red), G (Green), and B (Blue) pattern for the substrate; Printing at least one of R (Red), G (Green), and B (Blue) patterns on the substrate; And At least one of the R (Red), G (Green), B (Blue) pattern to adjust the height of at least one of the R (Red), G (Green), B (Blue) pattern printed on the substrate The printing method comprising the step of pressing the substrate printed on any one pattern. The method of claim 14, The pressing of the substrate may include pressing a substrate on which all of R (Red), G (Green), and B (Blue) patterns are printed. The method of claim 14, Pressing the substrate, Transferring a press roll to an upper surface of the substrate; Aligning the substrate with respect to the press roll; And Pressing the substrate with the press roll.

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