JP4788077B2 - Laser transfer method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  This invention, MosquitoFilterofThe present invention relates to a laser transfer method.
[0002]
[Prior art]
Conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open Nos. 10-206625 and 7-104113, a laser with a color filter transfer film having a heat-meltable color ink layer in close contact with a substrate is used. A method and apparatus for irradiating light to melt a color ink layer and transferring it to a substrate to form a color filter is disclosed.
[0003]
The transfer film for a color filter as described above is obtained by using a coating head having a slit-like nozzle that is long in the film width direction on a film substrate, and moving the color ink (colored) while moving the film relatively in the film longitudinal direction. The composition was formed by solid coating.
[0004]
Recently, the size of the color filter transfer film is an integral multiple (2 to 4 times) the width of the color filter so that four color filters can be taken from a single substrate or many more. There is.
[0005]
[Problems to be solved by the invention]
The wide transfer film for color filters as described above is also solid-coated with color ink by the application head, but it is too wide to obtain uniform application characteristics in the width direction during application. In addition, since the color ink is applied to the portion that is not transferred to the substrate, there is a problem that the material is wasted.
[0006]
Furthermore, in the laser transfer method and apparatus as described above, the color filter transfer film for irradiating the laser beam was cut into a sheet having a size substantially equal to the substrate, and was brought into close contact with the substrate. In the color filter transfer film cutting step, dust such as film chips is generated, which adheres to the substrate surface or the color filter transfer film on the substrate.
[0007]
  The present invention has been made in view of the above-described conventional problems, and is a color filter transfer film (hereinafter referred to as a color film) in which color ink is uniformly applied in the width direction.UsedLaser transfer methodThe lawThe purpose is to provide.
[0015]
[Means for Solving the Problems]
Les-The invention of the transfer methodA film base material, and a heat-meltable color ink layer formed by equally dividing a plurality of regions in the film width direction on the surface of the film base material, andColor ink layerDifferent colorIs a web that can be fed in the longitudinal directionDoubleA number of transfer films for color filters, the feeding direction of the substrate to which the color ink layer is to be transferredAnd each is a substrateA plurality of transfer films for color filters that are arranged so as to pass near the surface of the color filter,Between a pair of fixed film presser rolls in the film longitudinal directionOn the substrate surfaceEachClose contactThe substrate is fed in this tight contact state.The laser transfer method is characterized in that the color ink layers of the different colors are dissolved by irradiating each contact portion with laser light while being fed in the direction, and sequentially transferring to the substrate in the feed direction. To achieve.
[0016]
otherThe invention of the laser transfer method ofA web-like film base material, and a heat-meltable color ink layer of a plurality of colors formed on one side of the film base material by repeating a certain length in the longitudinal direction of the film. The color ink layer is equally divided in the film width direction.The color filter transfer film is disposed so as to pass near the surface of the substrate to which the color ink layer is to be transferred, and the color filter transfer film is disposed,Between a pair of fixed film feed rolls in the film longitudinal directionIn a state of being in close contact with the substrate surface, the substrateThe film longitudinaldirectionSent toByBetween the pair of film feed rolls of the color filter transfer filmClose partof,Pair with substrateClose contact positionWhile moving in the longitudinal direction of the film, the color ink layer is dissolved by irradiating the contact portion with a laser beam, transferred to the substrate, and after transfer,Fix the color filter transfer film so as not to move with respect to the substrate,The substrateMovement direction of the film longitudinal directionThe color ink layers of the plurality of colors are transferred onto the surface of the substrate by repeating this process for the plurality of colors with respect to the same substrate. The above object is achieved by a laser transfer method.
[0017]
In this invention, the color ink layer is equally divided in the width direction on the surface of the film substrate in the film width direction in accordance with the substrate to be transferred and the width of the transfer pattern. Uniform application characteristics in the width direction can be obtained, and the portion between the application areas corresponds to the non-display portion on the substrate surface, so that the application amount of the color ink is not wasted.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings.
[0019]
As shown in FIGS. 1 to 3, a laser transfer apparatus 10 for carrying out the laser transfer method of the present invention includes a stage 14 on which a substrate 12 on which a color ink layer is to be transferred is placed, and a stage 14 on the stage 14. Three transfer films that can supply color filter transfer films (hereinafter referred to as color films) 16R, 16G, and 16B (hereinafter referred to as 16 in general) along the surface of the substrate 12 placed thereon. A supply device 18R, 18G, 18B is provided at a position where it can come into contact with the surface of the substrate 12, and a certain longitudinal range of the color film 16 can be pressed in the longitudinal direction of the film so as to be in close contact with the surface of the substrate 12. A pair of film press rolls 20A and 20A and the stage 14 are attached to the pair of film press rolls 20A and 20A. And a roll driving device 22 that selectively moves to a pressing position to be in close contact with the substrate 12 on the surface 14 and a standby position that is further spaced above the color film spaced from the substrate 12. .
[0020]
As shown in FIG. 1, the stage 14 is provided on the front side of the column 14A so as to be movable within a certain range in the film feeding direction. A laser irradiation device 28 is provided at the upper end of the column 14A. From the laser irradiation device 28, the substrate 12 on the stage 14 can be irradiated with laser light from above.
[0021]
The roll driving device 22 is provided on the back of the stage 14 and the column 14A, and the film pressing rolls 20A and 20A project horizontally and parallel to both sides of the column 14A to the upper position of the substrate 12. As described above, the base end side is supported by the roll driving device 22.
[0022]
The roll driving device 22 moves up and down between a position where the pair of supported film pressing rolls 20A and 20A are pressed against the upper surface of the substrate 12 on the stage 14 from the vicinity of the laser irradiation device 28, that is, between the standby position and the pressing position. It is configured as follows.
[0023]
Further, the film pressing rolls 20A and 20A are rotatable, are in the pressing position, and are horizontal in a direction orthogonal to the rotation center axis of the film pressing rolls 20A and 20A with the stage 14 mounted thereon. When it is moved to (2), the color film 16 and the substrate 12 can be rolled.
[0024]
Further, as shown in FIG. 1, the stage 14 is disposed between the substrate carry-in device 30A and the substrate carry-out device 30B, receives the substrate 12 from the substrate carry-in device 30A, and sucks and holds it at a predetermined position. The substrate 12 is moved to the substrate carry-out device 30B side, and the substrate 12 is transferred to the substrate carry-out device 30B from here.
[0025]
The movement distance of the stage 14 from the substrate carry-in device 30A to the substrate carry-out device 30B is substantially equal to the length of the substrate 12 in the movement direction.
[0026]
As shown in FIG. 4, the substrate 12 has two color filters each in the width direction and the longitudinal direction, for a total of four, and a color ink layer is formed in the four color filter pattern regions 12A to 12D. It can be transcribed. The color film 16 includes a web-like film base material 17 and color ink layers 17A and 17B formed by equally dividing the surface of the film base material 17 into two rows in the width direction. Yes.
[0027]
The two rows of color ink layers 17A and 17B are formed with a width equal to two rows corresponding to the pattern in the width direction of the color filter pattern regions 12A to 12D on the substrate 12, and the width of the color ink layers 17A and 17B. The intermediate direction position is a non-application area 17C. A method for manufacturing the color film 16 will be described later.
[0028]
The three transfer film supply devices 18R, 18G, and 18B are provided corresponding to color films of three different colors, for example, R (red), G (green), and B (blue). The supply device 18R includes an original fabric roll 32R that unwinds the red color film 16R, and a winding roll 34R that winds the color film 16R that is unwound from the original fabric roll 32R. Similarly, the transfer film supply device 18G unwinds and winds the green color film 16G, and rolls the raw roll 32G and take-up roll 34G. The transfer film supply device 22 unwinds and winds the blue color film 16B. An anti-roll 32B and a take-up roll 34B are provided.
[0029]
The raw rolls 32R, 32G, 32B and the take-up rolls 34R, 34G, 34B are substantially horizontal and parallel to each other and higher than the stage 14 and perpendicular to the film longitudinal direction. The roll roll support shafts 33R, 33G, and 33B are slidably supported in the axial direction, and the take-up rolls 34R, 34G, and 34B are respectively supported by the take-up roll support shafts 35R, 35G, and 35B. Each is supported so as to be slidable in the axial direction.
[0030]
The web roll support shafts 33R, 33G, and 33B are arranged at intervals such that the web rolls 32R, 32G, and 32B supported by the web rolls do not interfere in the radial direction when they slide in the axial direction. .
[0031]
Similarly, the winding roll support shafts 35R, 35G, and 35B are also arranged at intervals such that the winding rolls 34R, 34G, and 34B do not interfere with each other in the radial direction.
[0032]
Next, a process for manufacturing the color film 16 will be described.
[0033]
As shown in FIG. 5, the web-like film base material 17 is fed substantially horizontally in the longitudinal direction, and with respect to the film base material 17 from above with respect to the film surface and in the film width direction. Long coating heads 36 </ b> A and 36 </ b> B are disposed, and color ink layers 17 </ b> A and 17 </ b> B can be applied and formed on the film substrate 17 by discharging color ink from the tips (lower ends) thereof.
[0034]
The widths of the coating heads 36A and 36B correspond to two divided areas in the film width direction in the color film pattern areas 12A to 12D.
[0035]
Further, a gap 37 is provided between the coating heads 36 </ b> A and 36 </ b> B corresponding to the non-coating region 17 </ b> C on the surface of the film substrate 17.
[0036]
When the color ink layers 17A and 17B are divided and applied in the film longitudinal direction corresponding to the color filter pattern areas 12A to 12D, the color ink layers 17A and 17B are applied by the application heads 36A and 36B. When applying, the coating heads 36A and 36B are raised at a pitch equal to the distance in the longitudinal direction in the color filter pattern regions 12A to 12D, and the color ink layers 17A and 17B are intermittently applied and formed in the longitudinal direction. .
[0037]
Here, for example, the coating head in the case where the color ink layer is continuously formed over the entire width of the film substrate 17 is long in the width direction, and the color ink layer is divided into two in the width direction. The discharge amount of the color ink from the coating heads 36A and 36B is 1.3 to 3 in the case of the coating heads 36A and 36B when the thickness of the formed color ink layer is 10 μm in the case of full width coating. It was about 2 μm.
[0038]
Next, a process of performing laser transfer by the laser transfer apparatus 10 will be described.
[0039]
First, the stage 14 is moved closer to the substrate carry-in device 30 </ b> A side, the substrate 12 is received from here, and the substrate 12 is fixed at the center position of the stage 14.
[0040]
  Next, the raw roll 32R and the take-up roll 34R are moved along the original roll support shaft 33R and the take-up roll support shaft 35R, and the color film 16R between them is a film press roll at the standby position. 20A, 20AAnd the substrate 12 are set.
[0041]
At this time, the raw fabric rolls 32G and 32B and the take-up rolls 34G and 34B of the other transfer film supply devices 18G and 18B are moved to positions separated from the stage 14 as shown in FIGS. .
[0042]
Next, the film pressing rolls 20 </ b> A and 20 </ b> A are pressed down by the roll driving device 22 to press the color film 16 </ b> R onto the substrate 12. At this time, if necessary, the color film 16R is sucked with a negative pressure and is brought into close contact with the substrate 12.
[0043]
Next, while moving the stage 14 in the direction of the substrate carry-out device 30B, the laser beam is irradiated from the laser irradiation device 28 to the color film 16R between the film pressing rolls 20A and 20A, and the heat melting property on the color film 16R. The color ink layer is melted and transferred onto the substrate 12.
[0044]
When the laser irradiation by the laser irradiation device 28 is continued while moving the stage 14 in the direction of the substrate carry-out device 30B, the color film 16R is in close contact with the substrate 12 between the film pressing rolls 20A and 20A, and the contact positions thereof are sequentially changed. The substrate 12 is moved from the substrate carry-out device 30B side toward the substrate carry-in device 30A.
[0045]
At this time, the color film 16R is also unwound from the original roll 32R and taken up by the take-up roll 34R according to the movement.
[0046]
As described above, the red color ink layer of the color film 16R is laser-transferred onto the substrate 12 over the entire range.
[0047]
After the laser transfer of the color film 16R is completed, the film pressing rolls 20A and 20A are returned to the standby position by the roll driving device 22.
[0048]
As a result, the color film 16R is in a non-contact state with both the substrate 12 and the film pressing rolls 20A and 20A. In this state, the original roll 32R and the winding roll 34R are moved to the left from the position of the stage 14 in FIG. Instead, the original roll 34G and the take-up roll 34G that unwinds and winds the color film 16G are moved to the stage 14 position. During this time, the stage 14 returns to the substrate carry-in device 30A side.
[0049]
From here, as in the case of the color film 16R, the film press rolls 20A and 20A are lowered to the pressing position, the stage 14 is moved, the laser irradiation is performed, and the color film 16G is unwound and wound. As in the case of red, laser transfer of the green color ink layer to the substrate 12 is executed.
[0050]
After the laser transfer of the color ink layer from the color film 16G is completed, the raw roll 32G and the take-up roll 34G are moved, and the original roll 32B and the take-up roll 34B are set on the substrate 12 as described above. Laser transfer of the blue color ink layer to the substrate 12 is performed.
[0051]
In this embodiment, since the color ink layers 17A and 17B are applied in two in the width direction corresponding to the color filter pattern regions 12A to 12D, the amount of color ink applied to the film substrate 17 is greatly increased. In addition to being able to reduce, the film thickness of the color ink layers 17A and 17B can also suppress problems such as non-uniformity in the width direction and waviness.
[0052]
Further, since the color ink layer 16 is laser-transferred to the substrate 12 using the web-like color film 16 (16R, 16G, 16B), the process of cutting the color film into a sheet is not necessary. It is possible to prevent the generation of associated chips and the adhesion of the chips to the color film or the substrate.
[0053]
  Next, a laser transfer apparatus 40 for carrying out another laser transfer method of the present invention shown in FIG.Inexplain about.
[0054]
The laser transfer device 40 includes three stages 44R, 44G, and 44B, transfer film supply devices 46R, 46G, and 46B provided corresponding to these stages, and film press rolls 48R, 49R, 48G, 49G, and 48B, 49B, roll drive devices 50R, 50G, and 50B, and laser irradiation devices 52R, 52G, and 52B.
[0055]
In this laser transfer device 40, the transfer film supply devices 46R, 46G, and 46B are fixed in position, unlike the case of the laser transfer device 10 in FIG. 1, but the rolls 54R, 54G, and 54B to the take-up roll 56R. , 56G, 56B are provided with guide rolls 58R, 58G, 58B for guiding the color films 16R, 16G, 16B so as not to interfere with each other.
[0056]
These guide rolls 58R, 58G, and 58B are disposed almost directly above the film pressing rolls 48R, 49R, 48G, 49G, 48B, and 49B, and the color films 16R, 16G, and 16B are substantially perpendicular to the substrate 12. It is supposed to be.
[0057]
In the laser transfer device 40, for example, after the red color ink layer is laser-transferred to the substrate 12 in the red stage 44R, the substrate 12 is moved to the next green stage 44G, where the same as described above. In the process, the green color ink layer is laser-transferred and finally moved onto the stage 44B, and the blue color ink layer is laser-transferred.
[0058]
Each stage 44R, 44G, 44B moves relative to each laser irradiation device 52R, 52G, 52B, and above and below the film pressing rolls 48R, 49R, 48G, 49G, 48B, 49B. The movement is the same as in the laser transfer apparatus 10 described above.
[0059]
Next, a laser transfer apparatus 60 for carrying out still another laser transfer method of the present invention will be described in detail with reference to the drawings.
[0060]
As shown in FIGS. 7 and 8, the laser transfer device 60 has a stage 64 on which a substrate 12 to which a color ink layer is to be transferred is placed, and a substrate 12 that is placed on the stage 64 and conveyed horizontally. 3 transfer film supply devices 68R, 68G, 68B capable of supplying web-like continuous color films 16A, 16G, 16B at different positions along the surface of the substrate in the substrate feed direction, and these 3 transfer films Corresponding to the supply devices 68R, 68G, 68B, it is provided at a position where it can come into contact with the surface of the substrate 12 so that a certain range in the longitudinal direction of the color films 16A, 16G, 16B is in close contact with the surface of the substrate 12. Film press roll equipment including each pair of film press rolls 20R, 21R, 20G, 21G, 20B, 21B in the pressable film longitudinal direction Those having 19R, 19G, and 19B, the.
[0061]
Each pair of film press rolls 20R, 21R, 20G, 21G, 20B, 21B is rotatably supported by frames 23R, 23G, 23B as shown in FIG. The frames 23R, 23G, and 23B are fixed to the transport table 64A at the front and rear positions of the transport table 64A in FIG.
[0062]
As shown in FIG. 7, the stage 64 rolls the lower side of the film pressing rolls 20R, 21R, 20G, 21G, 20B, and 21B onto the conveying table 64A within a certain range in the film feeding direction. While being reciprocally movable, it is provided. A mounting table 76 is provided on the rear side of the transport table 64A, and laser irradiation devices 78R, 78G, and 78B are provided on the upper end of the mounting table 76. The laser irradiation devices 78R, 78G, and 78B are respectively provided on the stage 64. The substrate 12 can be irradiated with laser light from above at a position between the film pressing rolls 20R, 21R, 20G, 21G, 20B, and 21B.
[0063]
The film press rolls 20R, 21R, 20G, 21G, 20B, and 21B are rotatable, and the film press rolls 20R, 21R, 20G, 21G, 20B, and 21B are rotated with the stage 64 mounted on the substrate 12. When moved horizontally in a direction perpendicular to the central axis, the color films 16R, 16G, and 16B and the substrate 12 can be brought into contact with each other.
[0064]
Further, as shown in FIG. 7, the stage 64 is disposed between the substrate carry-in device 30A and the substrate carry-out device 30B, receives the substrate 12 from the substrate carry-in device 30A, and holds it in a predetermined position. The substrate 12 is moved to the substrate unloading device 30B side, and the substrate 12 is transferred from here to the substrate unloading device 30B.
[0065]
As shown in FIG. 10, the stage 64 has a substrate receiving recess 15 into which the substrate 12 is fitted, and a plurality of film suction holes 15A around the substrate receiving recess 15 adjacent to the substrate receiving recess 15A. Are formed at appropriate intervals. Further, negative pressure is applied to these film suction holes 15A (negative pressure application mechanism is not shown) so that the color films 16R, 16G, and 16B can be sucked.
[0066]
The lengths of the film pressing rolls 20R, 21R, 20G, 21G, 20B, and 21B in the axial direction can press the color film 16 to the range of the film suction hole 15A.
[0067]
The three transfer film supply devices 68R, 68G, and 68B are provided corresponding to color films of three different colors, for example, R (red), G (green), and B (blue). The supply device 68R includes an original fabric roll 32R that unwinds the red color film 16R, and a winding roll 34R that winds the color film 16R that is unwound from the original fabric roll 32R. Similarly, the transfer film supply device 68G unwinds and winds the green color film 16G, and rolls the raw roll 32G and take-up roll 34G. The transfer film supply device 68B unwinds and winds the blue color film 16B. An anti-roll 32B and a take-up roll 34B are provided.
[0068]
The original fabric rolls 32R, 32G, 32B and the take-up rolls 34R, 34G, 34B are arranged on both sides of the stage 64 and higher than the above.
[0069]
Further, guide rolls 65R, 65G, and 65B for guiding the color films 16R, 16G, and 16B from the original rolls 32R, 32G, and 32B to the take-up rolls 34R, 34G, and 34B do not interfere with each other. Is provided.
[0070]
These guide rolls 65R, 65G, and 65B are disposed almost directly above the film pressing rolls 20R, 21R, 20G, 21G, 20B, and 21B, and the color films 16R, 16G, and 16B are substantially perpendicular to the substrate 12. It is supposed to be.
[0071]
Next, the operation of the laser transfer device 60 will be described.
[0072]
First, the stage 64 is brought close to the substrate carry-in device 30 </ b> A, the substrate 12 is received therefrom, and the substrate 12 is fixed to the substrate receiving recess 15 of the stage 64.
[0073]
Further, the color film 16R between the raw fabric roll 32R and the take-up roll 34R is set in advance under the film pressing rolls 20R and 21R. Similarly, the color films 16G and 16B between the original fabric rolls 32G and 32B and the take-up rolls 34G and 34B of the other transfer film supply devices 68G and 68B are also provided in advance under the film pressing rolls 20G and 21G and 20B and 21B. Keep it through.
[0074]
Next, while moving the stage 64 in the direction of the substrate carry-out device 30B with a negative pressure applied to the film suction hole 15A, laser light is emitted from the laser irradiation devices 28R, 28G, and 28B to the film pressing rolls 20R and 21R, The color films 16R, 16G, and 16B between 20G and 21G and 20B and 21B are irradiated, and the heat-meltable color ink layer on the color films 16R, 16G, and 16B is melted and transferred onto the substrate 12.
[0075]
At this time, as shown in FIG. 11, in the color film 16 between the pair of film pressing rolls, both ends in the feeding direction are pressed by the film pressing roll, and both ends in the width direction are film suction holes 15A. Therefore, the state of being in close contact with the substrate 12 is maintained.
[0076]
When laser irradiation by the laser irradiation devices 68R, 68G, and 68B is continued while the stage 64 is moved in the direction of the substrate carry-out device 30B, the color films 16R, 16G, and 16B have film pressing rolls 20R and 21R, 20G and 21G, and 20B and 21B. The close contact position sequentially moves on the substrate 12 from the substrate carry-out device 30B side toward the substrate carry-in device 30A.
[0077]
At this time, the color films 16R, 16G, and 16B are also unwound from the raw fabric rolls 32R, 32G, and 32B and wound around the take-up rolls 34R, 34G, and 34B according to the movement.
[0078]
As described above, the red, green, and blue color ink layers of the color films 16R, 16G, and 16B are sequentially laser-transferred onto the substrate 12 over the entire range.
[0079]
After the laser transfer of the color films 16R, 16G, and 16B is completed, the stage 14 is transferred to the substrate carry-out device 30B.
[0080]
In this embodiment, since the color ink layer is laser-transferred to the substrate 12 using the web-like color film 16 (16R, 16G, 16B), there is no need to cut the color film into a sheet. Yes, it is possible to prevent generation of chips accompanying cutting and adhesion of the chips to the color film or the substrate. Also, when transferring a plurality of color inks to the same substrate, it is not necessary to replace the color film, so the tact time is greatly reduced and the efficiency is improved.
[0081]
In the laser transfer device 10, the film suction holes 15 </ b> A are provided along the entire circumference of the rectangular substrate receiving recess 15, but this is on both sides in the width direction orthogonal to the feeding direction of the substrate 12. May be provided only.
[0082]
For example, when sequentially transferring, for example, R (red), green (G), and B (blue) color inks to the same substrate, it is naturally necessary to sequentially replace the sheets of the R, G, and B color films. In addition, there is a problem in that the tact time becomes large and inefficient.
[0083]
Hereinafter, still another laser transfer apparatus 70 for carrying out the method of the present invention shown in FIG. 12 will be described in detail.
[0084]
The laser transfer device 70 places a substrate 12 on which a color ink layer is to be transferred, and a stage 74 that horizontally conveys the substrate, and a surface of the substrate 12 that is placed on the stage 74 and conveyed horizontally. In this way, the color ink layers 77R, 77G, and 77B of three different colors, for example, R (red), G (green), and B (blue), are provided repeatedly in a regular manner in a web shape in the substrate feed direction. A transfer film supply device 78 that can supply the color film 76 that is provided, and a transfer film supply device 78 that corresponds to the transfer film supply device 78 and is provided at a position where it can come into contact with the surface of the substrate 12. A film press roll device 19 including a pair of film press rolls 20A and 20A in the longitudinal direction of the film that can be pressed so as to be in close contact with the surface of the substrate 12; The film pressing roll 20A to the substrate 12 on the over-di 74, the position between 20A, the laser irradiation apparatus 28 which is to be irradiated with a laser beam from above, but with the.
[0085]
The relationship between the film pressing roll device 19, the transport table 74A, the stage 74, the mounting table 86, the laser irradiation device 28, the substrate carry-in device 30A, and the substrate carry-out device 30B is the same as in FIGS. Therefore, explanation is omitted.
[0086]
The stage 74 is also provided with a substrate receiving recess 15 and a plurality of film suction holes 15A, as shown in FIG.
[0087]
The transfer film supply device 78 includes an original fabric roll 32 for unwinding the color film 76 and a take-up roll 34 for winding the color film 76 unwound from the original fabric roll 32. The original fabric roll 32 and the take-up roll 34 are arranged on both sides of the stage 74 and higher than this.
[0088]
Here, the structure and manufacturing method of the color film 76 will be described.
[0089]
As shown in FIG. 13, the color film 76 is formed by regularly and repeatedly applying the RGB color ink layers 77R, 77G, and 77B on the web-shaped film base 77 in a length equal to the film longitudinal direction. It is a thing.
[0090]
These color ink layers 77R, 77G, and 77B are set to have substantially the same length as that of the substrate 12. Moreover, it is divided into two equal parts in the width direction.
[0091]
As shown in FIG. 14, the manufacturing apparatus 80 for the color film 76 includes a back-up roll 82 on which a web-like film base 77 is wound and rotated to feed the film base 77 in the longitudinal direction. A slit die 84 that is provided to face the backup roll and that supplies and applies color ink to a part of the surface of the film base 77 that is wound around and closely attached to the backup roll 82. On the other hand, a coating liquid supply system 86 for supplying liquid color ink, a motor 88 for swinging the slit die 84 about the swing shaft 84A, and a coating liquid (color) from the coating liquid supply system 86 are provided. And a control device 90 for controlling the motor 88 while turning on and off the ink supply.
[0092]
The fuel supply system 86 sends a coating liquid tank 86A, a pump 86B, a motor 86C for driving the pump 86B, and a coating liquid supplied from the pump 86B toward the slit die 84 or the coating liquid tank 86A. And a switching valve 86D. The control device 90 can control the switching valve 86D.
[0093]
Reference numerals 90A and 90B in FIG. 14 denote a pre-coating position sensor that detects the position of the film base 77 before coating, and a post-coating position that detects the position of the film base 77 after color ink coating, respectively. Each sensor is shown. Detection signals from these two sensors are input to the control device 90.
[0094]
Reference numeral 92 in FIG. 14 indicates a guide roll for securing the winding angle of the film base 77 with respect to the backup roll 82.
[0095]
As shown in FIG. 15, the slit die 84 is formed by connecting two small slit dies 83A and 83B having a length divided in the film width direction in the width direction, and the tips of the small slit dies 94A and 94B. The slit-shaped nozzle 85 is closest to the surface of the film base 77 wound around the backup roll 82, and the application position where the discharged color ink can be applied to the surface of the film base 77, and FIG. 14 swings clockwise and swings between a retracted position spaced from the surface of the film base 77.
[0096]
The switching valve 86D in the coating liquid supply system 86 is configured to supply the coating liquid (liquid color ink) to the slit nozzle 85 only when the slit nozzle 85 is at the application position. Is switched and driven.
[0097]
The color film manufacturing apparatus 80 includes the backup roll 82, the slit die 84, the coating liquid supply system 86, the motor 88, the control device 90, and the pre-coating and post-position sensors 90A and 90B as a set, and the color ink layer 77R. , 77G, 77B, three sets corresponding to each color are provided, and the color base layer 77R, 77G, 77B, for example, in the order of the color ink layers on the surface of the film base 77 that is continuously fed. It is designed so that it can be repeatedly applied at regular length and regularly.
[0098]
Next, the process of applying the R, G, B color inks in this order will be described in detail.
[0099]
The distance in the longitudinal direction of the film to which the color ink layer 77R is to be applied is p, and each time the film substrate 77 is fed by 3p, the color ink layer 77R is formed in the first 1p area.
[0100]
Specifically, the length of the circumference of the backup roll 82 is 3p, and the circumference of the circumference of 1/3, that is, 1p, is larger than the other circumferential area of 2p. The large-diameter portion 82A has a radius R and is larger than the radius r of the other circumferential region (small-diameter portion 82B).
[0101]
The slit die 84 supplies ink to the outer surface of the film base 77 wound around the backup roll 82 in an area in close contact with the outer periphery of the large diameter portion 82A at the application position. It can be applied.
[0102]
Therefore, when the film base 77 is wound around the backup roll 82 and passes through the vicinity of the discharge port of the slit nozzle 85 at the application position, the outer periphery of the backup roll 82 is an area that is in close contact with the large diameter portion 82A. The color ink is applied only in a range corresponding to a rotation angle of 120 °.
[0103]
The large-diameter portion 82A is arc-shaped at both ends in the circumferential direction, and color ink is not applied to the film substrate in a range corresponding to the arc-shaped portion (see FIG. 13). Color mixing is prevented from occurring.
[0104]
The backup roll 82 is controlled in the number of rotations of the shaft as described below in order to prevent the occurrence of uneven coating.
[0105]
In the first place, when the film is fed by a roll having a shape like the backup roll 82 in which the large diameter portion 82A exists on a part of the circumference, if the rotation speed of the axis of the backup roll 82 is made constant, the diameter of the outer circumference of the roll In a portion where the diameter is large, the film is fed quickly, and in a portion where the diameter of the outer periphery of the roll is small, the film transport speed is slow.
[0106]
If the film transport speed changes after the ink is applied to the film, the applied undried ink film is accelerated in the film transport direction, which causes unevenness in the undried ink film that should have been uniformly applied. Will occur.
[0107]
In order to avoid such a situation, the rotational speed of the axis of the backup roll 82 is controlled so that the tangential speed of the outer periphery of the backup roll is constant (the film conveyance speed is also constant).
[0108]
Next, the film base 77 on which the red color ink layer 77R is formed is sent to an installation area such as a backup roll 82, a slit die 84, and a coating liquid supply system 86 for applying the next green color ink layer. Adjacent to the rear side of the color ink layer 77R formed in the length range of p, green color ink is applied in the same manner as described above to form the color ink layer 77G, and the remaining film base is formed in the same manner. The last blue color ink layer 77 </ b> B is formed in the intermittent region of the material 77.
[0109]
At this time, based on the detection values of the pre-coating position sensor 50A and the post-coating position sensor 50B, control is performed so that the color ink application region does not overlap the already applied color ink layer.
[0110]
The position of the large-diameter portion 82A of the backup roll 82 with respect to the film substrate 77 is sequentially shifted by 120 ° for each color of color ink.
[0111]
Next, a process of performing laser transfer on the substrate 12 using the color film 76 on which the color ink layers 77R, 77G, and 77B are formed as described above will be described.
[0112]
First, the stage 74 is brought close to the substrate carry-in device 30 </ b> A to receive the substrate 12 therefrom, and the substrate 12 is fixed to the substrate receiving recess 15 of the stage 74.
[0113]
Further, a color film 76 between the raw roll 32 and the take-up roll 34 is set in advance under the film pressing rolls 20A and 20A.
[0114]
Next, while moving the stage 74 in the direction of the substrate carry-out device 30B in a state where a negative pressure is applied to the film suction hole 15A, a color beam between the film pressing rolls 20A and 20A is emitted from the laser irradiation device 28. Then, one of the color ink layers 77R, 77G, and 77B on the color film 76, for example, the color ink layer 77R, is melted and transferred onto the substrate 12.
[0115]
At this time, the portion between the pair of film pressing rolls 20A, 20A in the color film 76 is pressed at both ends in the feeding direction by the film pressing roll, and both ends in the width direction are sucked into the film suction holes 15A. The state of being in close contact with the substrate 12 is maintained.
[0116]
When the laser beam irradiation by the laser irradiation device 28 is continued while moving the stage 74 in the direction of the substrate carry-out device 30B, the red color ink layer 77R in the color film 76 comes into close contact with the substrate 12 between the film pressing rolls 20A and 20A. However, the contact position sequentially moves on the substrate 12 from the substrate carry-out device 30B side toward the substrate carry-in device 30A.
[0117]
At this time, the color film 76 is unwound from the original fabric roll 32 and taken up on the take-up roll 34 according to the movement.
[0118]
As described above, the red color ink layer 77R of the color film 76 is laser-transferred onto the substrate 12 over the entire range.
[0119]
Next, the stage 74 is returned to the substrate carry-in device 30A side. At this time, the color film 76 is fixed so as not to move with respect to the substrate 12.
[0120]
Next, in the same manner as described above, the green color ink layer 77G in the color film 76 is irradiated with a laser beam while moving the stage 74 in the direction of the substrate carry-out device 30B, and laser-transferred. The color ink layer 77B is also laser-transferred over the entire range on the substrate 12, and the laser transfer of the RGB color ink layers 77R, 77G, and 77B is finished. After the laser transfer is finished, the substrate 12 on the stage 74 is finished. Is delivered to the substrate carry-out device 30B.
[0121]
【The invention's effect】
Since the present invention is configured as described above, the color ink of the wide color filter transfer film can be uniformly applied in the width direction and the coating liquid can be saved. Using a transfer film, a color ink layer of a plurality of colors can be laser-transferred to a substrate by a single operation, thereby generating dust due to cutting of the color film and attaching the dust to the color film or substrate. And an excellent effect that the tact time for replacing the color film can be omitted.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a laser transfer apparatus for carrying out a laser transfer method of the present invention.
FIG. 2 is a perspective view of the laser transfer apparatus viewed from above.
FIG. 3 is a perspective view of the laser transfer apparatus viewed from substantially the side.
FIG. 4 is a plan view showing a color filter pattern area on a substrate and a color ink layer on a color film.
FIG. 5 is a perspective view showing a manufacturing process of a color filter transfer film.
FIG. 6 is a schematic front view showing an outline of another laser transfer apparatus for carrying out the laser transfer method of the present invention.
FIG. 7 is a perspective view showing still another laser transfer apparatus for carrying out the laser transfer method of the present invention.
FIG. 8 is a front view schematically showing the laser transfer apparatus.
FIG. 9 is a perspective view showing a film pressing roll device in the laser transfer device.
FIG. 10 is a perspective view showing a stage in the laser transfer apparatus.
FIG. 11 is a perspective view showing a color film suction state in the laser transfer apparatus.
FIG. 12 is a perspective view showing still another laser transfer apparatus for carrying out the method of the present invention.
FIG. 13 is a perspective view showing a part of a color film for laser transfer.
FIG. 14 is a schematic side view including a partial block diagram showing an apparatus for producing a laser transfer color film.
FIG. 15 is an enlarged perspective view showing a slit die in the same manufacturing apparatus.
[Explanation of symbols]
10, 40, 60, 70 ... laser transfer device
12 ... Board
12A, 12B, 12C, 12D ... Color filter pattern area
14, 44R, 44G, 44B, 64, 70 ... stage
16, 16R, 16G, 16B ... Color filter transfer film
17, 77 ... Film substrate
17A, 17B, 77R, 77G, 77B ... Color ink layer
17C: Non-application area
18R, 18G, 18B, 46R, 46G, 46B, 68R, 68G, 68B, 78 ... transfer film supply device
20A, 20R, 20G, 20B, 21R, 21G, 21B, 48R, 49R, 48G, 49G, 48B, 49B ... Film press roll
22, 50R, 50G, 50B ... roll drive device
28, 52R, 52G, 52B ... Laser irradiation device
30A ... substrate loading device
30B ... Substrate unloading device
32R, 32G, 32B, 54R, 54G, 54B ... Raw roll
33R, 33G, 33B ... Raw roll support shaft
34R, 34G, 34B, 56R, 56G, 56B ... take-up roll
35R, 35G, 35B ... take-up roll support shaft
36A, 36B ... coating head
37 ... Gap
58R, 58G, 58B ... guide roll
83A, 83B ... Small slit die

Claims (3)

Each includes a film base material and a heat-meltable color ink layer formed by equally dividing the film base surface into a plurality of regions in the film width direction, and the color ink layer different colors, a multiple color filter transfer film made possible web-shaped feeding in the longitudinal direction and the feed direction of the substrate to be transferred to the color ink layer, and each pass through the vicinity of the surface of the substrate place manner, a plurality of color filter transfer film which is this arrangement, the pair of longitudinal direction of the film, is respectively in close contact with the substrate surface between stationary film presser roll, feeding the said substrate in this close contact state A laser transfer method characterized in that the color ink layers of different colors are dissolved by irradiating each contact portion with laser light while feeding in the direction, and sequentially transferring in the feed direction to the substrate. . 2. The film substrate according to claim 1, wherein the film base has substantially the same width as a substrate to which a pattern is transferred from the color ink layer, and the color ink layer matches the width of the color filter pattern region on the color filter base. And a laser transfer method characterized by being equally divided in the width direction. A web-like film base material, and a heat-meltable color ink layer of a plurality of colors formed on one side of the film base material by repeating a certain length in the longitudinal direction of the film. The color filter transfer film in which the color ink layer is equally divided in the film width direction is disposed so as to pass near the surface of the substrate to which the color ink layer is to be transferred, and the color filter thus disposed the use transfer film, the pair of longitudinal direction of the film, while being in close contact with the substrate surface between stationary film feed roll, by you route the substrate to the film longitudinal direction, of a transfer film for the color filter the adhesion portion between the pair of film feed roll, while moving the contact position against the substrate in the longitudinal direction of the film, irradiated with a laser beam to said seal wear parts Dissolving the color ink layer Te, transferred to the substrate, after the transfer, the transfer film for a color filter, and fixed so as not to move relative to the substrate, the moving direction of the substrate the film longitudinal direction The laser is moved in the reverse direction and returned to the original position, and this process is repeated for the plurality of colors on the same substrate, thereby transferring the color ink layers of the plurality of colors to the substrate surface. Transcription method.

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