JP5605474B2 - Recorded matter - Google Patents

Description

  The present invention relates to a recording method and the like.

An ink jet device is known as one of droplet discharge devices that can discharge a liquid material as droplets. In an ink jet apparatus, a liquid material such as ink can be ejected as droplets from an ejection head. By using such an ink jet device, various images can be recorded.
Conventionally, a recording method in which clear ink is superimposed on an image recorded using a droplet discharge device such as an ink jet device is known (see, for example, Patent Document 1).

JP 2004-263049 A

According to the recording method described in Patent Document 1, the glossiness of the image is enhanced.
By the way, in the droplet discharge device, the recording medium that is the target of recording is not limited to paper. As the recording medium, various materials and forms such as fiber sheets such as cloth and non-woven fabric, substrates such as plastic, resin, and glass can be used as long as an image can be formed by adhering a liquid ejected as droplets. Can be applied.

Depending on the combination of the composition of the liquid and the material and form of the recording medium, the liquid may not easily penetrate the recording medium. In such a case, the liquid adhering to the recording medium is solidified while protruding from the surface of the recording medium. When expressing gradation and color, a plurality of liquid materials may be superimposed. Due to these reasons, when the liquid does not easily penetrate into the recording medium, the image may be uneven. The unevenness generated in the image may be visually recognized as an unintended streak pattern. For this reason, the unevenness | corrugation which generate | occur | produces in an image tends to reduce the quality of an image.

If the clear ink is superimposed on the image in a state where the image is uneven, the image unevenness is easily reflected in the clear ink. For this reason, even when clear ink is superimposed on an image, a streaky pattern may be visually recognized.
That is, the conventional recording method has a problem that it is difficult to improve image quality.

SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1] A base layer forming step of forming a base layer with the base paint on the recording medium by applying a base paint to the recording medium, and an image paint that is a paint constituting an image applied to the base layer And a drawing step of drawing the image by overlaying the image with the image paint on the underlayer, and in the underlayer forming step, the unevenness obtained by inverting the unevenness of the image according to the unevenness of the image Is formed on the base layer.

The recording method of this application example includes a base layer forming step and a drawing step.
In the underlayer forming step, the undercoat layer is formed on the recording medium by applying the undercoat onto the recording medium.
In the drawing step, the image paint is applied to the underlayer, whereby the image is drawn on the underlayer with the image paint. The image paint is a paint constituting an image.
In this recording method, in the foundation layer forming step, irregularities obtained by inverting the irregularities of the image according to the irregularities of the image are formed on the foundation layer.
By the above, the unevenness | corrugation of an image coating material can be eased with a base layer. Thereby, it is possible to easily suppress the deterioration of the image quality due to the unevenness of the image paint. As a result,
The image quality can be improved easily.

Application Example 2 In the recording method described above, the base coating material has photocurability that is a property that curing is accelerated by light irradiation, and the base layer forming step includes the recording medium. And a step of irradiating the base paint applied to the substrate with the light.

In this application example, the base coating material has photocurability. The photo-curing property is a property that curing is accelerated by light irradiation. In this recording method, the underlayer forming step includes a step of irradiating light to the undercoat applied to the recording medium. Thereby, it can make it easy to accelerate | stimulate hardening of a base coating material before a drawing process.

Application Example 3 In the above recording method, the undercoat layer forming step includes applying the undercoat onto the recording medium by ejecting the undercoat onto the recording medium by an inkjet method. A recording method comprising:

In this application example, the base layer forming process includes a base paint applying process. In the base coating application process, the base coating is applied to the recording medium by discharging the base coating to the recording medium by an inkjet method. In this recording method, since the base coating is applied by the ink jet method, it is possible to easily apply an arbitrary amount of the base coating to an arbitrary portion of the recording medium.

Application Example 4 In the recording method described above, the image paint has a photo-curing property that is a property that curing is accelerated by receiving light irradiation, and the drawing step is applied to the underlayer. And a step of irradiating the applied image paint with the light.

In this application example, the image paint has photocurability. The photo-curing property is a property that curing is accelerated by light irradiation. In this recording method, the drawing step includes a step of irradiating the image paint applied to the underlayer with light. As a result, it is possible to facilitate the curing of the image paint.

Application Example 5 In the recording method described above, the drawing step includes an image paint application step of applying the image paint to the base layer by discharging the image paint by an ink jet method. Recording method.

In this application example, the drawing process includes an image paint application process. In the image paint application step, the image paint is applied to the underlayer by discharging the image paint onto the underlayer by an inkjet method. In this recording method, since the image paint is applied by the ink jet method, it is possible to easily apply an arbitrary amount of the image paint to an arbitrary portion of the recording medium.

Application Example 6 In the recording method described above, the recording medium and the base paint each have light transmittance.

In this application example, since the recording medium and the base coating material each have light transmittance, an image can be visually recognized through the recording medium.

Application Example 7 In the recording method described above, the base paint has a white color.

In this application example, since the base coating material is white, it is possible to easily improve the color developability in the image.

FIG. 2 is a perspective view illustrating a schematic configuration of a droplet discharge device according to the present embodiment. The front view when the carriage in this embodiment is seen in the A viewing direction in FIG. The bottom view of the head unit in this embodiment. Sectional drawing in the BB line in FIG. FIG. 2 is a block diagram illustrating a schematic configuration of a droplet discharge device according to the present embodiment. The figure which shows the flow of the drawing process in this embodiment. The figure which shows the flow of the recording method in this embodiment. FIG. 3 is a cross-sectional view schematically showing an underlayer and an image in the present embodiment. FIG. 3 is a cross-sectional view schematically showing an underlayer and an image in the present embodiment.

Embodiments will be described with reference to the drawings. In addition, in each drawing, in order to make each structure the size which can be recognized, the structure and the scale of a member may differ.

As shown in FIG. 1, which is a perspective view showing a schematic configuration, a droplet discharge device 1 according to the embodiment includes a workpiece transfer device 3, a carriage 7, a carriage transfer device 9, and a maintenance device 1.
1 and.
The carriage 7 is provided with a head unit 13 and two irradiation devices 15.
In the droplet discharge device 1, the liquid material is discharged from the head unit 13 as droplets while changing the relative position of the head unit 13 and the workpiece W such as a substrate in a plan view. A desired pattern can be drawn. In the figure, the Y direction indicates the moving direction of the workpiece W, and the X direction indicates a direction orthogonal to the Y direction in plan view. A direction orthogonal to the XY plane defined by the X direction and the Y direction is defined as the Z direction.

Such a droplet discharge device 1 can be applied to, for example, the manufacture of a color filter used for a liquid crystal display panel or the like, or the manufacture of an organic EL device.
In the case of a color filter having three color filter elements of red, green, and blue, the droplet discharge device 1 can be suitably used, for example, in a process of forming red, green, and blue colored layers on a substrate. In this case, each liquid material corresponding to each colored layer is ejected from the head unit 13 as droplets onto the work W, whereby the patterns of the red, green, and blue filter elements are drawn on the work W.
Further, in the manufacture of an organic EL device, for example, it can be suitably used in a step of forming a functional layer (organic layer) corresponding to each color for each of red, green and blue pixels. In this case, the head unit 13
The liquids corresponding to the functional layers of the respective colors are ejected as droplets onto the work W, whereby the patterns of the functional layers of red, green and blue are drawn on the work W.

Here, the details of each component of the droplet discharge device 1 will be described.
As shown in FIG. 1, the work transfer device 3 includes a surface plate 21, a guide rail 23 a, a guide rail 23 b, a work table 25, and a table position detection device 27.
The surface plate 21 is made of a material having a small coefficient of thermal expansion, such as stone, and is placed so as to extend along the Y direction. The guide rail 23a and the guide rail 23b are the surface plate 2
1 is disposed on the upper surface 21a. Each of the guide rail 23a and the guide rail 23b extends along the Y direction. The guide rail 23a and the guide rail 23b are
They are lined up with a gap in the X direction.

The work table 25 has a surface plate 21 sandwiching the guide rail 23a and the guide rail 23b.
It is provided in a state facing the upper surface 21a. The work table 25 is placed on the guide rail 23a and the guide rail 23b in a state of floating from the surface plate 21. The work table 25 has a placement surface 25a that is a surface on which the workpiece W is placed. The placement surface 25a is directed to the side (upper side) opposite to the surface plate 21 side. The work table 25 is guided along the Y direction by the guide rail 23a and the guide rail 23b, and is configured to be able to reciprocate on the surface plate 21 along the Y direction.
The table position detector 27 is provided on the upper surface 21a of the surface plate 21, and extends in the Y direction. The table position detection device 27 is provided between the guide rail 23a and the guide rail 23b. The table position detector 27 detects the position of the work table 25 in the Y direction.

The work table 25 is configured to reciprocate in the Y direction by a moving mechanism and a power source (not shown). As the moving mechanism, for example, a mechanism combining a ball screw and a ball nut, a linear guide mechanism, or the like may be employed. In the present embodiment, a work transfer motor described later is employed as a power source for moving the work table 25 along the Y direction. As the work transfer motor, various motors such as a stepping motor, a servo motor, and a linear motor can be adopted.
The power from the work transport motor is transmitted to the work table 25 through the moving mechanism. Thereby, the work table 25 can reciprocate along the guide rail 23a and the guide rail 23b, that is, along the Y direction. That is, the workpiece transfer device 3 can reciprocate the workpiece W placed on the placement surface 25a of the workpiece table 25 along the Y direction.

The head unit 13 includes a head plate 31 and two ejection heads 33 as shown in FIG. 2 which is a front view when the carriage 7 is viewed in the A viewing direction in FIG. The two ejection heads 33 are arranged in the X direction. Note that the number of ejection heads 33 is not limited to two, and an arbitrary number of one or more may be employed. Further, in the following, when identifying each of the two ejection heads 33, the notation of ejection head 33a and ejection head 33b is used.
As shown in FIG. 3 which is a bottom view, the discharge head 33 has a nozzle surface 35. A plurality of nozzles 37 are formed on the nozzle surface 35. In FIG. 3, the nozzles 37 are exaggerated and the number of the nozzles 37 is reduced in order to easily show the nozzles 37.

In each ejection head 33, the plurality of nozzles 37 constitute two nozzle rows 39 arranged along the Y direction. The two nozzle rows 39 are lined up with a gap in the X direction. In each nozzle row 39, the plurality of nozzles 37 are formed at a predetermined nozzle interval P along the Y direction. In each ejection head 33, the two nozzle rows 39 are mutually connected to Y.
The direction is shifted by a distance of P / 2.
In the head unit 13, the nozzle row 39 in one of the two ejection heads 33 and the nozzle row 39 in the other ejection head 33 are shifted from each other by a distance of P / 4 in the Y direction. Thereby, in the present embodiment, the density of the nozzles 37 in the Y direction is increased.

As shown in FIG. 2, the two irradiation devices 15 are provided at positions facing each other with the head unit 13 interposed therebetween in the X direction. Hereinafter, when identifying each of the two irradiation devices 15, the notation of the irradiation device 15a and the irradiation device 15b is used.
The irradiation device 15a is located on the opposite side of the ejection head 33a from the ejection head 33b side in the X direction. Further, the irradiation device 15b is located on the opposite side of the ejection head 33b from the ejection head 33a side in the X direction.
Each of the irradiation device 15 a and the irradiation device 15 b includes a light source 43 that emits ultraviolet light 41. The ultraviolet light 41 from the light source 43 promotes curing of the liquid material 45 ejected from the ejection head 33. When the liquid 45 is irradiated with the ultraviolet light 41, curing is accelerated.
As the light source 43, various light sources 43, such as LED, LD, a mercury lamp, a metal halide lamp, a xenon lamp, an excimer lamp, can be employ | adopted, for example.

As shown in FIG. 4 which is a cross-sectional view taken along line BB in FIG. 2, the discharge head 33 includes a nozzle plate 46, a cavity plate 47, a vibration plate 48, a plurality of piezoelectric elements 49,
have.
The nozzle plate 46 has a nozzle surface 35. The plurality of nozzles 37 are provided on the nozzle plate 46.
The cavity plate 47 is provided on the surface opposite to the nozzle surface 35 of the nozzle plate 46. A plurality of cavities 51 are formed in the cavity plate 47. Each cavity 51 is provided corresponding to each nozzle 37 and communicates with each corresponding nozzle 37. The functional liquid 53 is supplied to each cavity 51 from a tank (not shown).

The diaphragm 48 is provided on the surface of the cavity plate 47 opposite to the nozzle plate 46 side. The vibration plate 48 vibrates in the Z direction (longitudinal vibration), thereby enlarging or reducing the volume in the cavity 51.
The plurality of piezoelectric elements 49 are respectively provided on the surface of the diaphragm 48 opposite to the cavity plate 47 side. Each piezoelectric element 49 is provided corresponding to each cavity 51 and faces each cavity 51 with the diaphragm 48 interposed therebetween. Each piezoelectric element 49 expands based on the drive signal. Thereby, the diaphragm 48 reduces the volume in the cavity 51. At this time, pressure is applied to the functional liquid 53 in the cavity 51. As a result, the functional liquid 53 is discharged as droplets 55 from the nozzle 37. The method of discharging the droplet 55 by the discharge head 33 is one of ink jet methods. The ink jet method is one of coating methods.

As shown in FIG. 2, the ejection head 33 having the above configuration is supported by the head plate 31 with the nozzle surface 35 protruding from the head plate 31.
As shown in FIG. 2, the carriage 7 supports the head unit 13. Here, the head unit 13 is supported by the carriage 7 with the nozzle surface 35 facing downward in the Z direction.
In the present embodiment, the longitudinal vibration type piezoelectric element 49 is adopted, but the pressurizing means for applying pressure to the functional liquid 53 is not limited to this, and for example, the lower electrode and the piezoelectric layer A flexural deformation type piezoelectric element in which an electrode and an upper electrode are laminated may be employed. Further, as the pressurizing means, a so-called electrostatic actuator that generates static electricity between the diaphragm and the electrode, deforms the diaphragm by electrostatic force, and ejects droplets from the nozzles can be employed. Furthermore, the structure which generate | occur | produces a bubble in a nozzle using a heat generating body, and gives a pressure to a functional liquid with the bubble may be employ | adopted.

In the present embodiment, a liquid 45 that is cured by being irradiated with light is used as the functional liquid 53. In the present embodiment, ultraviolet light 41 (FIG. 2) is adopted as light that accelerates the curing of the liquid material 45.
The liquid body 45 contains a resin material, a photopolymerization initiator, and a solvent as components. By adding functional materials such as pigments and dyes such as pigments and surface modifying materials such as lyophilic and liquid repellent properties to these components, a liquid 45 having a specific function can be generated. . The liquid 45 containing a pigment such as a pigment or a dye can be employed as the functional liquid 53 for forming an image drawn on the workpiece W, for example. Hereinafter, the liquid 45 as the functional liquid 53 for forming an image to be drawn on the workpiece W is referred to as image paint.

Further, by adopting a resin material having optical transparency such as an acrylic resin material as the resin material as a component of the liquid material 45, the functional liquid 53 having optical transparency can be configured. Such a light-transmitting functional liquid 53 may be used as a clear ink, for example. Hereinafter, the functional liquid 53 having light transmittance is referred to as a light-transmitting paint.
As the use of the clear ink, for example, a use as an overcoat layer for covering an image, a use as a base layer before forming an image, and the like can be considered. In the following, the functional liquid 53 applied as a base layer is referred to as a base paint.
The base paint is not only a translucent paint, but also a functional liquid 53 in which various pigments are added to the translucent paint.
Can also be adopted.
The resin material in the liquid body 45 is a material that forms a resin film. Such a resin material is not particularly limited as long as it is a liquid material at room temperature and becomes a polymer by being polymerized. The resin material preferably has a low viscosity, and is preferably in the form of an oligomer. Furthermore, the resin material is more preferably in the form of a monomer.
The photopolymerization initiator is an additive that acts on the crosslinkable group of the polymer to advance the crosslinking reaction.
As the photopolymerization initiator, for example, benzyldimethyl ketal can be employed.
The solvent is for adjusting the viscosity of the resin material.

As shown in FIG. 1, the carriage conveyance device 9 includes a gantry 61, a guide rail 63, and a carriage position detection device 65.
The gantry 61 extends in the X direction, and connects the work transfer device 3 and the maintenance device 11 to the X direction.
Crossing the direction. The gantry 61 is opposite to the surface plate 21 side of the work table 25, and faces the work transfer device 3 and the maintenance device 11. The pedestal 61 has the support 6
7a and the support 67b. The column 67a and the column 67b are provided at positions facing each other in the X direction across the surface plate 21. Each of the support columns 67a and the support columns 67b protrudes above the work table 25 in the Z direction. Thereby, the mount 61
And a work table 25, and between the gantry 61 and the maintenance device 11, gaps are maintained.

The guide rail 63 is provided on the surface plate 21 side of the gantry 61. The guide rail 63 is
It extends along the X direction and is provided across the width of the gantry 61 in the X direction.
The carriage 7 described above is supported by the guide rail 63. In a state where the carriage 7 is supported by the guide rail 63, the nozzle surface 35 of the discharge head 33 faces the work table 25 side in the Z direction. The carriage 7 is guided along the X direction by the guide rail 63, and is supported by the guide rail 63 so as to be able to reciprocate in the X direction.
In a plan view, in a state where the carriage 7 overlaps the work table 25, the nozzle surface 35 and the mounting surface 25a of the work table 25 face each other with a gap therebetween.
The carriage position detection device 65 is provided between the gantry 61 and the carriage 7, and X
Extends in the direction. The carriage position detection device 65 detects the position of the carriage 7 in the X direction.

The carriage 7 is configured to reciprocate in the X direction by a moving mechanism and a power source (not shown). As the moving mechanism, for example, a mechanism combining a ball screw and a ball nut, a linear guide mechanism, or the like may be employed. In this embodiment, the carriage 7 is set to X
As a power source for moving along the direction, a carriage transport motor, which will be described later, is employed. Carriage transport motors include stepping motors, servo motors,
Various motors such as a linear motor can be employed.
The power from the carriage transport motor is transmitted to the carriage 7 through the moving mechanism.
Thus, the carriage 7 can reciprocate along the guide rail 63, that is, along the X direction. That is, the carriage conveyance device 9 can reciprocate the head unit 13 supported by the carriage 7 along the X direction.

As shown in FIG. 1, the maintenance device 11 includes a surface plate 71, a guide rail 73a, a guide rail 73b, a maintenance table 75, a capping unit 76, a flushing unit 77, and a wiping unit 79. ing.
The surface plate 71 is made of a material having a small coefficient of thermal expansion, such as stone, and is provided at a position facing the surface plate 21 across the support 67a in the X direction.
The guide rail 73 a and the guide rail 73 b are disposed on the upper surface 71 a of the surface plate 71. Each of the guide rail 73a and the guide rail 73b extends along the Y direction. The guide rail 73a and the guide rail 73b are lined up with a gap in the X direction.
The maintenance table 75 is provided in a state facing the upper surface 71a of the surface plate 71 with the guide rail 73a and the guide rail 73b interposed therebetween. The maintenance table 75 is placed on the guide rail 73a and the guide rail 73b in a state of floating from the surface plate 71.

On the maintenance table 75, maintenance units such as a capping unit 76, a flushing unit 77, and a wiping unit 79 are placed. In the present embodiment, the maintenance unit includes a capping unit 76, a flushing unit 77, and a wiping unit 7.
9 and.
The maintenance table 75 is guided along the Y direction by the guide rail 73a and the guide rail 73b, and is configured to reciprocate on the surface plate 71 along the Y direction.
The flushing unit 77 is provided on the side of the maintenance table 75 opposite to the surface plate 71 side.
Here, regardless of the pattern drawing on the workpiece W, the operation of discharging the liquid material from the discharge head 33 is called a flushing operation. For the flushing operation, for example, the nozzle 3
7 has an effect of preventing the liquid material staying in the nozzle 7 from being solidified in the nozzle 37. The flushing unit 77 is a device that receives the liquid material ejected from the ejection head 33 during the flushing operation.

The capping unit 76 is a device that covers the ejection head 33. Discharge head 33
In the liquid discharged from the liquid, the liquid component may evaporate. Generally, when the liquid component in the liquid material evaporates, the viscosity of the liquid material increases. When the viscosity of the liquid in the ejection head 33 increases, the performance of ejecting the droplets 55 in the nozzle 37 (hereinafter referred to as ejection performance) may decrease. As a drop in the discharge performance, for example, the droplet 55 discharged from the nozzle 37 is used.
And the traveling direction is bent (flight bend), or the droplet 55 is not discharged from the nozzle 37 (non-discharge). The operation of covering the ejection head 33 with the capping unit 76 is called a capping operation.

The capping unit 76 covers the ejection head 33 to keep the liquid component in the liquid material from evaporating from the nozzles low. Thereby, the discharge performance in the discharge head 33 can be easily maintained.
The wiping unit 79 is a device that wipes the nozzle surface 35 of the ejection head 33. In the droplet discharge device 1, a liquid material may adhere to the nozzle surface 35. If the liquid material adheres to the nozzle surface 35, the ejection performance of the ejection head 33 may be degraded. The wiping unit 79 wipes the liquid material adhering to the nozzle surface 35 by wiping the nozzle surface 35. Thereby, the discharge performance in the discharge head 33 can be easily maintained. The operation of wiping the nozzle surface 35 with the wiping unit 79 is called a wiping operation.

The maintenance table 75 is configured to reciprocate in the Y direction by a moving mechanism and a power source (not shown). As the moving mechanism, for example, a mechanism combining a ball screw and a ball nut, a linear guide mechanism, or the like may be employed. In the present embodiment, a table transport motor, which will be described later, is adopted as a power source for moving the maintenance table 75 along the Y direction. Various motors such as a stepping motor, a servo motor, and a linear motor can be adopted as the table transport motor.
The power from the table transport motor is transmitted to the maintenance table 75 via the moving mechanism. Thereby, the maintenance table 75 can reciprocate along the guide rail 73a and the guide rail 73b, that is, along the Y direction.
That is, the maintenance device 11 can reciprocate maintenance units such as the capping unit 76, the flushing unit 77, and the wiping unit 79 along the Y direction. Thereby, the ejection head 33 can be made to face the capping unit 76, the flushing unit 77, and the wiping unit 79 in a state where the ejection head 33 overlaps the maintenance device 11 in plan view.

As shown in FIG. 5, the droplet discharge device 1 includes a control unit 111 that controls the operation of each of the above-described configurations. The control unit 111 includes a CPU (Central Processing Unit) 113, a drive control unit 115, and a memory unit 117. Drive control unit 115 and memory unit 11
7 is connected to the CPU 113 via the bus 119.
The droplet discharge device 1 includes a carriage transport motor 121 and a work transport motor 12.
3, a table transport motor 125, an input device 129, and a display device 131.
The carriage transfer motor 121, the workpiece transfer motor 123, and the table transfer motor 125 are respectively connected to the control unit 1 via the input / output interface 133 and the bus 119.
11 is connected. The input device 129 and the display device 131 are also connected to the control unit 111 via the input / output interface 133 and the bus 119, respectively.

The carriage transport motor 121 generates power for driving the carriage 7.
The work conveyance motor 123 generates power for driving the work table 25.
The table transport motor 125 generates power for driving the maintenance table 75.
The input device 129 is a device for inputting various processing conditions. The display device 131 is a device that displays processing conditions and work status. An operator who operates the droplet discharge device 1 can input various information via the input device 129 while confirming information displayed on the display device 131.
The carriage position detection device 65, the table position detection device 27, and the two ejection heads 33 are also connected to the control unit 111 via the input / output interface 133 and the bus 119, respectively.
It is connected to the. The two irradiation devices 15 and the maintenance device 11 are also connected to the control unit 111 via the input / output interface 133 and the bus 119, respectively.

The CPU 113 performs various arithmetic processes as a processor. The drive control unit 115 controls driving of each component. The memory unit 117 includes a RAM (Random Access Memory), RO
M (Read-Only Memory) and the like are included. In the memory unit 117, an area for storing the program software 135 in which the operation control procedure in the droplet discharge device 1 is described, a data development unit 137 that is an area for temporarily developing various data, and the like are set. Yes. Examples of data developed in the data development unit 137 include drawing data indicating a pattern to be drawn, program data such as drawing processing, and the like.
The drive control unit 115 includes a motor control unit 141, a position detection control unit 143, a discharge control unit 145, an irradiation control unit 147, a maintenance control unit 149, and a display control unit 151.

The motor control unit 141 individually controls the drive of the carriage transport motor 121, the drive of the work transport motor 123, and the drive of the table transport motor 125 based on a command from the CPU 113.
The position detection control unit 143 individually controls the carriage position detection device 65 and the table position detection device 27 based on a command from the CPU 113.
The position detection control unit 143 causes the carriage position detection device 65 to detect the position of the carriage 7 in the X direction based on a command from the CPU 113 and outputs the detection result to the CPU 113.
Further, the position detection control unit 143 causes the table position detection device 27 to detect the position of the work table 25 in the Y direction based on a command from the CPU 113, and the detection result is represented by CP.
Output to U113.

The discharge control unit 145 individually controls driving of the two discharge heads 33 based on a command from the CPU 113.
The irradiation control unit 147 individually controls the light emission state of the light source 43 in each of the irradiation device 15a and the irradiation device 15b based on a command from the CPU 113.
The maintenance control unit 149 performs the capping unit 76, the flushing unit 77, and the wiping unit 79 in the maintenance device 11 based on a command from the CPU 113.
Control the maintenance unit drive individually.
The display control unit 151 controls driving of the display device 131 based on a command from the CPU 113.

Here, the drawing process in the droplet discharge device 1 will be described.
In the droplet discharge device 1, the control unit 111 receives an input / output interface 13 from the input device 129.
3 and the bus 119, the CPU 113 starts the drawing process shown in FIG.
Here, the drawing data indicates a pattern to be drawn on the workpiece W with the functional liquid 53 (liquid material), and the pattern to be drawn is expressed in a bitmap shape. The pattern is drawn on the workpiece W while the ejection head 33 is opposed to the workpiece W, while the ejection head 33 and the workpiece W are relatively reciprocated, the droplet 55 is ejected from the ejection head 33 at a predetermined cycle. Is done by letting

In the drawing process, the CPU 113 first outputs a carriage conveyance command to the motor control unit 141 (FIG. 5) in step S1. At this time, the motor control unit 141 controls the drive of the carriage transport motor 121 to move the carriage 7 to the forward path start position of the drawing area. Here, the drawing area is an area where the locus drawn along the Y direction by the work table 25 shown in FIG. 1 and the locus drawn along the X direction by the two ejection heads 33 overlap. The forward path start position is a position where the forward path when the carriage 7 is reciprocated is started. In the present embodiment, the forward path start position is located between the maintenance device 11 and the work table 25 in the X direction. The forward path start position is located outside the work table 25 in plan view.
Next, in step S2, the CPU 113 sends a workpiece transfer command to the motor control unit 1.
41 (FIG. 5). At this time, the motor control unit 141 includes the workpiece transfer motor 12.
3 is controlled to move the workpiece W to the drawing area.

Next, in step S3, the CPU 113 outputs a carriage scanning command to the motor control unit 141 (FIG. 5). At this time, the motor control unit 141 controls the drive of the carriage transport motor 121 to start the reciprocation of the carriage 7.
Here, in the reciprocating movement of the carriage 7, the carriage 7 reciprocates between the forward path start position and the backward path start position described above. That is, the path that returns from the forward path start position to the forward path start position and returns to the forward path start position is one round trip of the carriage 7. For this reason, in this embodiment, the path from the forward path start position to the return path start position is the forward path of the carriage 7. On the other hand, the path from the return path start position to the forward path start position is the return path of the carriage 7.
The return path start position is a position facing the forward path start position with the work table 25 (FIG. 1) sandwiched in the X direction. The return path start position is located outside the work table 25 in plan view. For this reason, the forward path start position and the backward path start position indicate the work table 25 as X
They face each other across the direction.
Next, in step S4, the CPU 113 outputs an irradiation command for the irradiation device 15a to the irradiation controller 147 (FIG. 5). At this time, the irradiation control unit 147 uses the irradiation device 15a.
The driving of the light source 43 is controlled to turn on the light source 43 of the irradiation device 15a.

Next, in step S5, the CPU 113 sends a discharge command to the discharge control unit 145 (FIG. 5).
). At this time, the discharge controller 145 controls the drive of the discharge head 33 and discharges the droplet 55 from each nozzle 37 based on the drawing data. As a result, the forward drawing is performed.
Next, in step S6, the CPU 113 determines whether or not the position of the carriage 7 has reached the return path start position. At this time, if it is determined that the position of the carriage 7 has reached the return path start position (Yes), the process proceeds to step S7. On the other hand, if it is determined that the position of the carriage 7 has not reached the return path start position (No), the process waits until the position of the carriage 7 reaches the return path start position.

In step S7, the CPU 113 outputs a stop command for the irradiation device 15a to the irradiation control unit 147 (FIG. 5). At this time, the irradiation control unit 147 uses the light source 4 of the irradiation device 15a.
3 is controlled to turn off the light source 43 of the irradiation device 15a.
Next, in step S8, the CPU 113 issues a line feed command to the motor control unit 141 (
Output to FIG. At this time, the motor control unit 141 controls the drive of the work transport motor 123 to move the work W in the Y direction (new line), and move a new area in the work W where a pattern is to be drawn to the drawing area.
Next, in step S9, the CPU 113 outputs an irradiation command for the irradiation device 15b to the irradiation control unit 147 (FIG. 5). At this time, the irradiation control unit 147 provides the irradiation device 15b.
The driving of the light source 43 is controlled to turn on the light source 43 of the irradiation device 15b.

Next, in step S10, the CPU 113 outputs a discharge command to the discharge control unit 145 (FIG. 5). At this time, the discharge controller 145 controls the drive of the discharge head 33 and discharges the droplet 55 from each nozzle 37 based on the drawing data. As a result, drawing on the return path is performed.
Next, in step S11, the CPU 113 determines whether or not the position of the carriage 7 has reached the forward path start position. At this time, if it is determined that the position of the carriage 7 has reached the forward path start position (Yes), the process proceeds to step S12. On the other hand, the carriage 7
If it is determined that the position of the carriage 7 has not reached the forward path start position (No), the process waits until the position of the carriage 7 reaches the forward path start position.

In step S12, the CPU 113 outputs a stop command for the irradiation device 15b to the irradiation control unit 147 (FIG. 5). At this time, the irradiation control unit 147 controls the driving of the light source 43 of the irradiation device 15b to turn off the light source 43 of the irradiation device 15b.
Next, in step S13, the CPU 113 determines whether or not the drawing data has been completed. At this time, if it is determined that the drawing data has ended (Yes), the processing ends.
On the other hand, if it is determined that the drawing data has not ended (No), the process proceeds to step S14.
In step S14, the CPU 113 issues a line feed command to the motor control unit 141 (FIG. 5).
The process proceeds to step S4. At this time, the motor control unit 141 controls the drive of the work conveyance motor 123 to move the work W in the Y direction (new line),
A new area where a pattern is to be drawn in the work W is moved to the drawing area.

(Example)
The result of creating an image with the base paint and the image paint using the above-described droplet discharge device 1 will be described.
Here, the recording method in the present embodiment will be described.
As shown in FIG. 7, the recording method in the present embodiment includes a base layer forming step S21 and a drawing step S22.
In the foundation layer forming step S <b> 21, the foundation layer is formed on the workpiece W with the foundation paint using the droplet discharge device 1.
In the drawing step S22, a pattern is drawn on the workpiece W based on the above-described drawing process (FIG. 6). In the drawing step S22, a pattern is drawn on the base layer.

The underlayer forming step S21 includes a drawing data generation step S2101, a drawing step S2102,
have.
In the drawing data generation step S2101, the pattern of the underlying layer (hereinafter referred to as the underlying pattern)
The drawing data for drawing is generated.
In the drawing step S2102, the drawing process shown in FIG. 6 is performed based on the drawing data of the base pattern. In the drawing process in the drawing step S <b> 2102, a base paint is applied as the functional liquid 53. In this embodiment, a light-transmitting paint is used as the base paint.

A method for generating the drawing data of the ground pattern will be described.
The drawing data of the ground pattern is generated based on the drawing data of the image to be drawn with the image paint.
Here, gradation (shading) is expressed in the image to be drawn with the image paint. In the image,
The image paint is applied thicker in the high gradation (dark) portion than in the low gradation (light) portion. In the present embodiment, the gradation in the image is expressed by comparing the thick part and the thin part of the image paint. For this reason, as shown in FIG.
Unevenness due to gradation occurs. The underlayer 165 is provided with irregularities obtained by inverting the irregularities of the image. Thereby, as shown in FIG. 9, the unevenness | corrugation of the image 161 can be made easy to cancel.

In the present embodiment, in the image 161, the height of the gradation is expressed by applying the image paint 163 in multiple layers. In this embodiment, a plurality of layers are formed one by one. That is, in this embodiment, when the image paint 163 is stacked on a plurality of layers, the drawing process (FIG. 6) is performed for each layer. For example, when the gradation is expressed by applying the image paint 163 in three layers, the drawing process (FIG. 6) is repeated three times. In this case, the drawing data includes bitmap data for three times (three layers). By performing the drawing process based on the bitmap data for one layer (FIG. 6) three times, the image paint 163 is changed to 3
A gray level superimposed on a layer can be expressed.
In other words, in the present embodiment, the gradation in which the image paint 163 is superimposed on a plurality of layers can be expressed by repeatedly performing the drawing process (FIG. 6) based on the bitmap data for one layer a plurality of times.

Therefore, the unevenness distribution in the image 161 can be grasped by superimposing the bitmap data for a plurality of layers.
Thereby, the CPU 113 shown in FIG. 5 can generate the drawing data of the base pattern based on the drawing data of the image 161.
In generating the ground pattern drawing data, the CPU 113 first calculates the uneven distribution in the image 161 based on the drawing data of the image 161. Next, the CPU 113 calculates the uneven distribution in the base pattern based on the result of calculating the uneven distribution in the image 161. At this time, the unevenness distribution in the base pattern is a distribution obtained by inverting the unevenness in the image 161 as shown in FIG. As a result, the image 161 is formed on the underlayer 165.
When the images are drawn in an overlapping manner, the unevenness of the image 161 can be canceled. That is, the underlayer 16
5 can reduce the unevenness of the image 161.
In this way, the drawing data of the base pattern can be generated.
And in drawing process S2102 shown in FIG. 7, based on the drawing data of a base pattern,
The drawing process shown in FIG. 6 is performed. In the base pattern drawing process, the base paint 16 is applied to the workpiece W.
The base layer 165 is formed by applying 7 (FIG. 9).

In the embodiment, the base coating material 167 is applied to the light-transmitting work W using the droplet discharge device 1.
A base layer 165 was formed.
Next, using the droplet discharge device 1, based on the drawing data of the image 161, the image paint 16
3, an image 161 was formed so as to overlap the base layer 165.
The image quality of the image 161 of the example was evaluated, and the surface roughness of the image 161 was measured. The result will be described later.

(Comparative example)
An image 161 was created with the image paint 163 using the droplet discharge device 1. In this comparative example,
The underlayer 165 is omitted.
In the comparative example, the image 161 was formed with the image paint 163 based on the drawing data of the image 161 on the light-transmitting workpiece W using the droplet discharge device 1. Note that the drawing data of the image 161 is the same drawing data as in the example.
The image quality of the image 161 of the comparative example was evaluated, and the surface roughness of the image 161 was measured. A model P-10 manufactured by KLA-Tencor was used as a surface roughness measuring instrument.
The results of Examples and Comparative Examples are shown in Table 1 below.

In the evaluation results of the image quality in Table 1, “◯” indicates that uniform and high glossiness was obtained.
“Δ” indicates that glossiness is low in a part of the image.
“X” indicates that glossiness is low in most of the image.
In the evaluation of the image quality, each of the viewing direction D from the image 161 side and the viewing direction E from the work W side shown in FIG. 9 was evaluated.
From the results shown in Table 1, it is understood that the image quality in the example is better than the comparative example in any of the viewing direction D from the image 161 side and the viewing direction E from the workpiece W side. . This can be understood from the measurement result of the surface roughness. It is understood that the surface roughness of the example is much smaller than the surface roughness of the comparative example.
Accordingly, the image quality can be improved by interposing the base layer 165 provided with irregularities obtained by inverting the irregularities of the image 161 according to the irregularities of the image 161 between the recording medium (work W) and the image 161. It can be made easier.

In the present embodiment, the drawing step S2102 corresponds to the base coating application step, and the drawing step S2
2 corresponds to the image paint application process.
In this embodiment, the image 161 can be visually recognized through the work W by forming the base layer 165 with a light-transmitting paint on the work W having light transmittance.
In the present embodiment, when the base paint 167 exhibiting white is employed, it is possible to easily improve the color developability of the image 161 when observed from the image 161 side.

DESCRIPTION OF SYMBOLS 1 ... Droplet discharge apparatus, 3 ... Work conveyance apparatus, 7 ... Carriage, 9 ... Carriage conveyance apparatus,
DESCRIPTION OF SYMBOLS 13 ... Head unit, 15 ... Irradiation device, 15a, 15b ... Irradiation device, 25 ... Work table, 33 ... Discharge head, 33a, 33b ... Discharge head, 35 ... Nozzle surface, 37 ... Nozzle, 39 ... Nozzle row, 41 ... Ultraviolet light, 43 ... light source, 45 ... liquid, 53 ... functional liquid, 55 ... droplet, 161 ... image, 163 ... image paint, 165 ... undercoat layer, 167 ... undercoat paint.

Claims (7)

A recording medium ;
A base layer formed by a base paint on the recording medium ;
An image layer formed by an image paint on the underlayer,
The recorded material, wherein the underlayer has irregularities obtained by inverting the irregularities of the image layer . The recorded matter according to claim 1, wherein the base coating material has photocurability, which is a property that curing is accelerated by irradiation of light . The recorded matter according to claim 1, wherein the base layer is formed by discharging the base paint onto the recording medium by an inkjet method . The recorded matter according to any one of claims 1 to 3, wherein the image paint has a photo-curing property, which is a property that curing is accelerated by receiving light irradiation . 5. The recorded matter according to claim 1, wherein the image layer is formed by discharging the image paint by an inkjet method . The recorded matter according to claim 1, wherein each of the recording medium and the base layer has light transmittance . Recorded matter according to any one of claims 1 to 5, characterized in that the underlying layer is white in color.

Images