JP3988628B2 - Droplet discharge device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a droplet discharge device.
[0002]
[Prior art]
Conventionally, ink jet printers have been widely used mainly as consumer printers. An industrial liquid droplet ejection apparatus (inkjet drawing apparatus) using the inkjet system (liquid droplet ejection system) of this inkjet printer has been proposed. This industrial droplet discharge device is used, for example, for manufacturing a color filter, an organic EL device or the like in a liquid crystal display device, or for forming a metal wiring on a substrate.
[0003]
In an industrial liquid droplet ejection apparatus, an object such as a substrate becomes large and is intended for mass production, so that the amount of ejection liquid such as ink ejected from the head is very large.
In the conventional droplet discharge device, in order to cope with an increase in ink consumption, a sub tank (first liquid chamber) for supplying ink to the ink jet head and a main tank (second tank) for supplying ink to the sub tank are provided outside the device main body. A liquid chamber) and the main tank can be replaced (for example, see Patent Document 1).
[0004]
However, since the droplet discharge device described in Patent Document 1 has only one main tank corresponding to one color ink, the operation of the droplet discharge device must be stopped when replacing the main tank. In other words, there is a problem that the production amount (throughput) decreases. Also, if the main tank has a large capacity, when handling the main tank that is full of ink in the replacement work of the main tank, the weight of the main tank becomes considerably heavy. is there. As a result, there is a limit to increasing the capacity of the main tank.
[0005]
[Patent Document 1]
JP-A-8-150732 [0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a droplet discharge device that can achieve both a large capacity and easy tank replacement work, and can continue operation even when the tank is replaced.
[0007]
[Means for Solving the Problems]
Such an object is achieved by the present invention described below.
The droplet discharge device of the present invention includes a liquid supply device for supplying a liquid,
A drainage device for collecting the drainage;
A workpiece placement unit capable of placing a workpiece;
A droplet discharge head for discharging droplets to the workpiece placed on the workpiece placement unit;
A droplet discharge device that includes a moving mechanism that relatively moves the workpiece placement unit and the droplet discharge head, and is used to manufacture a color filter or an organic EL display device,
The liquid supply device includes a plurality of liquid supply tanks for storing liquids to be supplied;
An outflow passage connected to each of the plurality of liquid supply tanks;
A flow path switching means for connecting an outflow flow path corresponding to one liquid supply tank selected from the plurality of liquid supply tanks to the liquid supply path toward the liquid supply destination;
For each of the liquid supply tanks, a liquid amount detection means for detecting the amount of liquid in the liquid supply tank,
The drainage device includes a plurality of drainage tanks for storing the collected drainage,
An inflow channel connected to each of the plurality of drainage tanks;
A flow path switching means for connecting an inflow path corresponding to one drainage tank selected from the plurality of drainage tanks to a drainage path from the drainage collection destination;
With respect to each drainage tank, provided with a liquid amount detection means for detecting the liquid amount in the drainage tank,
The plurality of liquid supply tanks include a first liquid supply tank and a second liquid supply tank,
When the first liquid supply tank is emptied and when the second liquid supply tank is emptied, the fact is notified by letters, figures, sounds or sounds, respectively.
When the first liquid supply tank is emptied and when the second liquid supply tank is emptied, the notification character, figure, sound, or voice is made different, and the first liquid supply tank is emptied. It is configured so that it can be understood which one of the liquid supply tank and the second liquid supply tank is empty,
The plurality of drainage tanks include a first drainage tank and a second drainage tank,
When the first drainage tank is full and when the second drainage tank is full, respectively, this is notified by letters, figures, sounds or voices,
When the first drainage tank is full and when the second drainage tank is full, the notification character, figure, sound, or voice is different, and the first drainage tank is full. It is configured so that it can be determined which one of the drainage tank and the second drainage tank is full.
As a result, the capacity of the liquid supply device and the drainage device can be increased and the replacement work of the liquid supply tank and the drainage tank can be facilitated, and the operation can be continued when the liquid supply tank and the drainage tank are replaced. A possible droplet discharge device can be provided.
Moreover, when each liquid supply tank is likely to become empty, this can be detected.
In addition, when each drainage tank is likely to become full, this can be detected.
[0008]
In the droplet discharge device of the present invention, it is preferable that at least one of the plurality of liquid supply tanks is replaceable.
Thereby, replenishment of the liquid to a liquid supply tank can be performed easily.
In the droplet discharge device according to the aspect of the invention, it is preferable that the liquid to be supplied is a liquid discharged from the droplet discharge head.
Thereby, it is possible to effectively cope with an increase in consumption of liquid discharged from the droplet discharge head.
[0009]
In the droplet discharge device of the present invention, it is preferable that the liquid to be supplied is a cleaning liquid used in a cleaning device that cleans the droplet discharge head.
Accordingly, it is possible to effectively cope with an increase in consumption of the cleaning liquid used in the cleaning device that cleans the droplet discharge head.
[0010]
In the droplet discharge device of the present invention, the control means for controlling the operation of the flow path switching means of the liquid supply device based on the detection result of each liquid amount detection means for detecting the liquid amount in the liquid supply tank It is preferable to further provide.
Thereby, the switching of the flow path switching means can be automated and labor saving can be achieved.
In the droplet discharge device of the present invention, it is preferable to further include a pressurizing unit capable of pressurizing the inside of each liquid supply tank.
Thereby, the liquid in a liquid supply tank can be sent with the pressure from a pressurization means.
[0011]
In the droplet discharge device of the present invention, a pressure path connected to each of the liquid supply tanks,
It is preferable to further include a pressure path switching means for connecting one pressure path selected from the plurality of pressure paths to the path from the pressure means.
As a result, the switching of the pressurizing path switching means can be automated and labor saving can be achieved.
[0013]
In the droplet discharge device of the present invention, it is preferable that at least one of the plurality of drainage tanks is replaceable.
Thereby, the collection | recovery of the drainage from a drainage tank can be performed easily.
In the droplet discharge device of the present invention, it is preferable that the drainage liquid is a liquid recovered from a capping device that caps the droplet discharge head.
Accordingly, it is possible to effectively cope with an increase in the amount of drainage collected from the capping device that capping the droplet discharge head.
[0014]
In the liquid droplet ejection apparatus according to the aspect of the invention, it is preferable that the drainage liquid is a liquid ejected by discarding liquid ejection and / or dot dropout inspection by the liquid droplet ejection head.
Thereby, it is possible to effectively cope with an increase in the amount of drainage generated by the discard discharge of the droplet discharge head and / or the dot dropout inspection.
In the droplet discharge device of the present invention, the control means for controlling the operation of the flow path switching means of the drainage device based on the detection result of the liquid volume detection means for detecting the liquid amount in the drainage tank It is preferable to further comprise.
Thereby, the switching of the flow path switching means can be automated and labor saving can be achieved.
[0018]
In the liquid droplet ejection apparatus according to the present invention, a predetermined pattern is formed on the workpiece by ejecting liquid droplets from the liquid droplet ejection head while relatively moving the work placement unit and the liquid droplet ejection head. It is preferable to do.
Thereby, various patterns can be formed (drawn) on the workpiece according to the purpose.
[0019]
The electro-optical device of the present invention is manufactured using the droplet discharge device of the present invention.
Accordingly, it is possible to provide an electro-optical device that is suitable for mass production and can reduce the manufacturing cost.
The electro-optical device manufacturing method of the present invention is characterized by using the droplet discharge device of the present invention.
Accordingly, it is possible to provide a method of manufacturing an electro-optical device that is suitable for mass production and can reduce manufacturing costs.
An electronic apparatus according to the present invention includes the electro-optical device according to the present invention.
As a result, an electronic device suitable for mass production and capable of reducing the manufacturing cost can be provided.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a droplet discharge device of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.
FIG. 1 and FIG. 2 are a plan view and a side view, respectively, showing an embodiment of a droplet discharge device provided with a liquid supply device and a liquid discharge device of the present invention. Hereinafter, for convenience of explanation, one horizontal direction (a direction corresponding to the left and right direction in FIGS. 1 and 2) is referred to as a “Y-axis direction”, which is perpendicular to the Y-axis direction and is in a horizontal direction ( The direction corresponding to the vertical direction in FIG. 1 is referred to as “X-axis direction”. Further, the movement in the Y-axis direction in the right direction in FIGS. 1 and 2 is “advance in the Y-axis direction”, and the movement in the Y-axis direction in the left direction in FIGS. 1 and 2 is “Y "Reverse in the axial direction", the movement in the X-axis direction and downward in FIG. 1 is "forward movement in the X-axis direction", and the movement in the X-axis direction and upward in FIG. Say “Axis Backward”.
[0021]
A droplet discharge device (inkjet drawing device) 1 shown in these drawings applies, for example, a liquid (discharge liquid) such as ink or a functional liquid containing a target material to a substrate W as a workpiece by an inkjet method (droplet). This is a device that forms (draws) a predetermined pattern by discharging in the form of small droplets by a discharge method). For example, a color filter or an organic EL device in a liquid crystal display device is manufactured, or a metal wiring is formed on a substrate. It is an industrial droplet discharge device that can be used for forming. The material of the substrate W targeted by the droplet discharge device 1 is not particularly limited, and any material can be used as long as it is a plate-like member (work). For example, a glass substrate, a silicon substrate, a flexible substrate, and the like are targeted. can do. Further, in the present invention, the workpiece targeted by the droplet discharge device is not limited to a plate-like member, and for example, any lens may be used as a workpiece, and a coating such as an optical thin film is formed by discharging droplets onto the lens. The present invention can also be applied to a droplet discharge device that performs such a process. In addition, the present invention is particularly preferably applied to a relatively large droplet discharge device 1 that can cope with a relatively large workpiece (for example, a length and a width of about several tens of centimeters to several meters each). can do.
[0022]
The droplet discharge apparatus 1 is configured to maintain the apparatus main body 2, the substrate table (work placement unit) 3, the head unit 11 having a plurality of droplet discharge heads (inkjet heads) 111, and the droplet discharge head 111. A maintenance device 12, a tank unit 13, a blow device 14 for blowing gas onto the substrate W, a laser length measuring device 15 for measuring the moving distance of the substrate table 3, a control device 16, and a dot dropout detection unit 19 I have.
[0023]
The liquid ejected from the droplet ejection head 111 is not particularly limited, and includes, for example, the following liquids (including dispersions such as suspensions and emulsions) in addition to the ink including the filter material of the color filter. It can be. A light emitting material for forming an EL light emitting layer in an organic EL (electroluminescence) device. A fluorescent material for forming a phosphor on an electrode in an electron emission device. A fluorescent material for forming a phosphor in a PDP (Plasma Display Panel) device. -Electrophoretic material that forms an electrophoretic body in an electrophoretic display device. Bank material for forming a bank on the surface of the substrate W.・ Various coating materials. -Liquid electrode material for forming electrodes. A particle material that forms a spacer for forming a minute cell gap between two substrates. -Liquid metal material for forming metal wiring. -Lens material for forming microlenses. -Resist material. A light diffusing material for forming a light diffuser.
[0024]
As shown in FIG. 2, the apparatus main body 2 includes a gantry 21 installed on the floor, and a stone surface plate 22 installed on the gantry 21. On the stone surface plate 22, the substrate table 3 is installed so as to be movable in the Y-axis direction with respect to the apparatus main body 2. The substrate table 3 moves forward and backward in the Y-axis direction by driving the linear motor 101. The substrate W is placed on the substrate table 3.
[0025]
The droplet discharge device 1 targets substrates W of various sizes and shapes from a relatively large substrate W having a size similar to that of the substrate table 3 to a relatively small substrate W smaller than the substrate table 3. can do. In principle, it is preferable to perform the droplet discharge operation in a state where the substrate W is positioned so as to coincide with the center of the substrate table 3. However, in the case of a relatively small substrate W, the substrate W is moved toward the end of the substrate table 3. The droplets may be ejected by positioning at a different position.
[0026]
As shown in FIG. 1, in the vicinity of two sides along the X-axis direction of the substrate table 3, the liquid is discharged (flushed) from the droplet discharge head 111 before the droplet discharge (drawing) on the substrate W, respectively. A pre-drawing flushing unit 104 for receiving the discharged droplets is installed. A suction tube (not shown) is connected to the pre-drawing flushing unit 104, and the discharged and discharged discharge liquid passes through this suction tube and is collected by the drainage device 18 described later.
[0027]
The moving distance of the substrate table 3 in the Y-axis direction is measured by a laser length measuring device 15 as a moving distance detecting means. The laser length measuring device 15 includes a laser length measuring device sensor head 151, a prism 152 and a laser length measuring device main body 153 installed in the apparatus main body 2, and a corner cube 154 installed on the substrate table 3. Laser light emitted from the laser length measuring device sensor head 151 along the X-axis direction is bent by the prism 152 and proceeds in the Y-axis direction, and is irradiated onto the corner cube 154. The reflected light from the corner cube 154 returns to the laser length measuring device sensor head 151 through the prism 152. In the droplet discharge device 1, the discharge timing from the droplet discharge head 111 is generated based on the movement distance (current position) of the substrate table 3 detected by the laser length measuring device 15.
[0028]
In addition, a main carriage 102 that supports the head unit 11 is installed in the apparatus main body 2 so as to be movable in the X-axis direction in the space above the substrate transfer table 3. The head unit 11 having a plurality of droplet discharge heads 111 moves forward and backward in the X-axis direction together with the main carriage 102 by driving a linear motor actuator 103 including a linear motor and a guide.
[0029]
In the droplet discharge device 1 of the present embodiment, so-called main scanning of the droplet discharge head 111 is based on the discharge timing generated using the laser length measuring device 15 while moving the substrate table 3 in the Y-axis direction. The droplet discharge head 111 is driven (selective discharge of discharged droplets). Correspondingly, so-called sub-scanning is performed by movement of the head unit 11 (droplet ejection head 111) in the X-axis direction.
[0030]
The apparatus main body 2 is provided with a blower 14 that semi-drys the droplets discharged onto the substrate W. The blow device 14 has a nozzle that opens in a slit shape along the X-axis direction, and blows gas toward the substrate W from the nozzle while transporting the substrate W in the Y-axis direction by the substrate table 3. In the droplet discharge device 1 of the present embodiment, two blow devices 14 are provided that are located at positions separated from each other in the Y-axis direction.
[0031]
The maintenance device 12 is installed on the side of the gantry 21 and the stone surface plate 22. The maintenance device 12 includes a capping unit 121 for capping the droplet discharge head 111 during standby of the head unit 11, a cleaning unit 122 for wiping the nozzle formation surface of the droplet discharge head 111, and a periodic discharge of the droplet discharge head 111. It has a regular flushing unit 123 that receives proper flushing and a weight measurement unit 125.
[0032]
In addition, the maintenance device 12 includes a moving table 124 that can move in the Y-axis direction. The capping unit 121, the cleaning unit 122, the regular flushing unit 123, and the weight measuring unit 125 are arranged on the moving table 124 in the Y-axis direction. It is installed side by side. When the moving table 124 moves in the Y-axis direction with the head unit 11 moving above the maintenance device 12, any one of the capping unit 121, the cleaning unit 122, the regular flushing unit 123, and the weight measuring unit 125 drops. It can be positioned below the discharge head 111. The head unit 11 moves above the maintenance device 12 during standby, and performs capping, cleaning (wiping), and regular flushing in a predetermined order.
[0033]
The capping unit 121 has a plurality of caps arranged so as to correspond to each of the plurality of droplet discharge heads 111 and a lifting mechanism that lifts and lowers these caps. A suction tube (not shown) is connected to each cap, and the capping unit 121 covers the nozzle formation surface of each droplet discharge head 111 with each cap and discharges from the nozzle formed on the nozzle formation surface. Liquid can be aspirated. By performing such capping, it is possible to prevent the nozzle formation surface of the droplet discharge head 111 from drying, or to recover (resolve) nozzle clogging.
[0034]
Capping by the capping unit 121 is performed when the head unit 11 is on standby, when the head unit 11 is initially filled with the discharge liquid, or when the discharge liquid is discharged from the head unit 11 when the discharge liquid is replaced with a different type. This is performed when the flow path is washed by, for example.
Discharged liquid discharged from the droplet discharge head 111 during capping by the capping unit 121 passes through the suction tube, is collected by a capping liquid draining device 17 described later, and is reused. However, the cleaning liquid collected when the flow path is cleaned is not reused.
[0035]
The cleaning unit 122 operates such that a wiping sheet containing a cleaning liquid (for example, a solvent capable of dissolving the discharge liquid) is run by a roller, and the nozzle forming surface of the droplet discharge head 111 is wiped and cleaned by the wiping sheet. To do.
The regular flushing unit 123 is used for flushing when the head unit 11 is on standby, and receives the ejected liquid droplets discarded and ejected by the liquid droplet ejection head 111. A suction tube (not shown) is connected to the regular flushing unit 123, and the discharged and discharged discharge liquid passes through the suction tube and is collected by the drainage device 18 described later.
[0036]
The weight measurement unit 125 is used to measure a single droplet discharge amount (weight) from the droplet discharge head 111 as a preparation stage of a droplet discharge operation on the substrate W. That is, before the droplet discharge operation on the substrate W, the head unit 11 moves above the weight measurement unit 125 and drops droplets from the discharge nozzles of each droplet discharge head 111 one or more times to the weight measurement unit 125. Discharge against. The weight measuring unit 125 includes a liquid receiver that receives the discharged droplets and a weight scale such as an electronic balance, and measures the weight of the discharged droplets. Alternatively, the liquid receiver may be removed and measurement may be performed with a scale outside the apparatus. The control device 16 to be described later calculates the amount (weight) of one discharge droplet in the discharge nozzle based on the weight measurement result, and the liquid is adjusted so that the calculated value becomes equal to a predetermined design value. The applied voltage of the head driver that drives the droplet discharge head 111 is corrected.
[0037]
The dot dropout detection unit 19 is fixedly installed at a place on the stone surface plate 22 that does not overlap the movement area of the substrate table 3 and is located below the movement area of the head unit 11. The missing dot detection unit 19 detects missing dots caused by clogging of the nozzles of the droplet discharge head 111 and includes, for example, a light projecting unit and a light receiving unit that project and receive laser light. Yes. When dot missing detection is performed, the head unit 11 discards and discharges droplets from each nozzle while moving in the X-axis direction in the space above the dot missing detection unit 19. The projected droplet is projected and received to optically detect the presence and location of a clogged nozzle. At this time, the discharge liquid discharged from the droplet discharge head 111 is collected in a tray provided in the dot dropout detection unit 19, and drained as described later through a suction tube (not shown) connected to the bottom of the tray. It is collected by the device 18.
[0038]
The tank unit 13 has a rack (shelf) 131. The rack 131 includes a first discharge liquid tank 401, a second discharge liquid tank 402, a first cleaning liquid tank 501, and a second cleaning liquid tank, which will be described later. 502, a first drainage tank (first reuse tank) 171, a second drainage tank (second reuse tank) 172, a first drainage tank 181 (first waste liquid tank), and a first Two drainage tanks (second waste liquid tanks) 182 are installed so as to be replaceable (detachable) (see FIG. 9).
[0039]
Such a droplet discharge device 1 (excluding the control device 16) is preferably placed in an environment in which the temperature and humidity are controlled by the chamber device 9. The chamber device 9 includes a chamber (isolated space) 91 that stores the droplet discharge device 1, and a temperature adjusting device 92 that is installed outside the chamber 91. The temperature adjusting device 92 incorporates a known air conditioner device and generates air (temperature-controlled air) whose temperature and humidity are adjusted. The temperature-controlled air is sent to the ceiling 911 of the chamber 91 through the introduction duct 93. This temperature-controlled air passes through the filter 912 from the ceiling back 911 and is introduced into the main chamber 913 of the chamber 91.
[0040]
A separate chamber 916 is provided in the chamber 91 by partition walls 914 and 915, and the tank unit 13 is installed in the separate chamber 916. In the partition wall 914, a communication portion (opening) 917 that connects the main chamber 913 and the separate chamber 916 is formed. An exhaust duct 94 is connected to the separate chamber 916. The temperature-controlled air introduced into the main chamber 913 passes through the communication portion 917 and flows into the separate chamber 916, and then passes through the exhaust duct 94 and is discharged to the outside of the chamber device 9.
[0041]
By controlling the temperature and humidity around the droplet discharge device 1 with such a chamber device 9, it is possible to prevent an error from occurring due to expansion / contraction of the substrate W and each part of the device due to temperature change. And the accuracy of the pattern drawn (formed) on the substrate W by the discharged droplets can be increased. Further, since the tank unit 13 is also placed in an environment in which the temperature and humidity are controlled, the viscosity of the discharged liquid is stabilized, and the pattern formation (drawing) by the discharged liquid droplets can be performed with higher accuracy. Further, entry of dust, dust and the like into the chamber 91 can be prevented, and the substrate W can be kept clean.
The chamber 91 is supplied and filled with a gas other than air (for example, an inert gas such as nitrogen, carbon dioxide, helium, neon, argon, krypton, xenon, radon, etc.) at a controlled temperature. It is good also as operating the droplet discharge apparatus 1 in atmosphere.
[0042]
Outside the chamber 91, a control device (control means) 16 for controlling the operation of each part of the droplet discharge device 1 is installed. The control device 16 includes a central processing unit (CPU) and a storage unit that stores (stores) various programs such as a program for executing a control operation of the droplet discharge device 1 and various data. The operation of each part of the droplet discharge device 1 is controlled.
[0043]
3 is a plan view showing the gantry, the stone surface plate, and the substrate table in the droplet discharge device shown in FIGS. 1 and 2, and FIG. 4 is the gantry, the stone surface plate in the droplet discharge device shown in FIGS. It is a side view which shows a substrate table.
As shown in FIG. 4, the gantry 21 includes a frame body 211 formed by assembling an angle member or the like in a square shape, and a plurality of support legs 212 that are dispersedly arranged below the frame body 211. The stone surface plate 22 is made of a solid stone material, and the upper surface thereof has high flatness. The stone surface plate 22 prevents the influence of ambient environmental conditions, vibrations, and the like, and the substrate table 3 and the head unit 11 can be moved with high accuracy.
[0044]
On the stone surface plate 22, a linear motor 101 and an air slider 108 are installed as a Y-axis direction moving mechanism. The substrate table 3 is supported by the air slider 108 so as to be able to move smoothly in the Y-axis direction, and moves in the Y-axis direction by driving the linear motor 101. In addition, a θ-axis rotating mechanism 105 is provided at the lower part of the substrate table 3 so that the substrate table 3 can be rotated within a predetermined range with a vertical θ-axis passing through the center of the substrate table 3 as a rotation center. It has become.
As shown in FIG. 3, the substrate table 3 is formed with a plurality of suction ports (suction portions) 332 for sucking and fixing the placed substrate W.
[0045]
5 is a plan view showing the head unit and the X-axis direction moving mechanism in the droplet discharge device shown in FIGS. 1 and 2, FIG. 6 is a side view seen from the direction of arrow A in FIG. 5, and FIG. It is the front view seen from the arrow B direction in FIG. 5 and FIG. 7, illustration of a part of the installed equipment is omitted.
As shown in these drawings, the apparatus main body 2 includes four columns 23 installed on a stone surface plate 22 and two columns parallel to each other extending along the X-axis direction supported by these columns 23. And girders (beams) 24 and 25. The substrate table 3 can pass under the girders 24 and 25.
[0046]
As shown in FIG. 5, the main carriage 102 and the camera carriage 106 are installed on the girders 24 and 25 so as to be bridged between the girders 24 and 25, respectively. A linear motor actuator 103 is installed in the beam 24 as an X-axis direction moving mechanism common to the main carriage 102 and the camera carriage 106. The main carriage 102 and the camera carriage 106 are installed so as to be able to move smoothly in the X-axis direction by guidance of the linear motor actuator 103 and a linear guide provided on the beam 25, respectively. The main carriage 102 and the camera carriage 106 move independently in the X-axis direction by driving the linear motor actuator 103.
[0047]
A head unit 11 is supported on the main carriage 102. When the head unit 11 moves in the X-axis direction together with the main carriage 102, sub-scanning of the droplet discharge head 111 is performed. The head unit 11 is connected to a pipe (not shown) for supplying the discharge liquid, a wiring cable (not shown), and the like. The head unit 11 is detachable from the main carriage 102.
The camera carriage 106 is provided with a recognition camera 107 for recognizing an image of alignment marks provided at predetermined positions on the substrate W. The recognition camera 107 is supported in a state where it is suspended downward from the camera carriage 106. Note that the recognition camera 107 may be used for other purposes.
[0048]
FIG. 8 is a plan view schematically showing the configuration of the head unit and the droplet discharge operation in the droplet discharge apparatus shown in FIGS. As shown in FIG. 8, on the nozzle formation surface of the droplet discharge head 111, a large number of discharge nozzles (openings) for discharging droplets are formed in a line or two or more lines. The droplet discharge head 111 has a piezoelectric element that is displaced (deformed) by application of a voltage, and a pressure chamber (liquid chamber) formed so as to communicate with the discharge nozzle by using the displacement (deformation) of the piezoelectric element. The liquid droplets are ejected from the ejection nozzles by changing the pressure inside. The droplet discharge head 111 is not limited to such a configuration. For example, the droplet discharge head 111 may be configured such that the discharge liquid is heated by a heater to boil, and the droplet is discharged from the discharge nozzle by the pressure. .
The head unit 11 is provided with a plurality of droplet discharge heads 111 (described as 12 in the following description). Each of these droplet discharge heads 111 is arranged in two rows in a row in the sub-scanning direction (X-axis direction), and the nozzle rows are arranged so as to be inclined at a predetermined angle with respect to the sub-scanning direction.
[0049]
Note that such an arrangement pattern is an example. For example, adjacent droplet discharge heads 111 in each head row are arranged with an angle of 90 ° (adjacent heads are in a “C” shape) The droplet discharge heads 111 between the head rows may be arranged with an angle of 90 ° (the heads between the rows are in a “C” shape). In any case, it is sufficient that dots formed by all the discharge nozzles of the plurality of droplet discharge heads 111 are continuous in the sub-scanning direction.
[0050]
Furthermore, the droplet discharge heads 111 do not have to be installed in a posture inclined with respect to the sub-scanning direction, and a plurality of droplet discharge heads 111 may be arranged in a staggered or stepped manner. . Further, as long as a nozzle row (dot row) having a predetermined length can be configured, it may be configured by a single droplet discharge head 111. A plurality of head units 11 may be installed on the main carriage 102.
[0051]
Here, the overall operation of the droplet discharge device 1 under the control of the control device 16 will be briefly described. When the substrate W placed (supplied) on the substrate table 3 is positioned (prealigned) at a predetermined position by the operation of the substrate positioning device (not shown) provided in the droplet discharge device 1, the substrate table 3 The substrate W is sucked and fixed to the substrate table 3 by air suction from each suction port 332. Next, when the substrate table 3 and the camera carriage 106 are moved, the recognition camera 107 is moved above an alignment mark provided at a predetermined position (one or a plurality of positions) of the substrate W, and this alignment mark is recognized. To do. Based on the recognition result, the θ-axis rotating mechanism 105 is operated to correct the angle of the substrate W about the θ-axis, and the position correction of the substrate W in the X-axis direction and the Y-axis direction is performed on the data ( Book alignment).
[0052]
When the alignment operation of the substrate W as described above is completed, each droplet discharge head 111 is moved while moving the substrate W in the main scanning direction (Y-axis direction) by moving the substrate table 3 with the head unit 11 stopped. To selectively eject droplets onto the substrate W. At this time, the droplet discharge operation may be performed while the substrate table 3 is moving forward (forward), while it is moving backward (backward), or both forward and backward (reciprocating). Alternatively, the droplet ejection operation may be repeated a plurality of times by reciprocating the substrate table 3 a plurality of times. With the above operation, the ejection of the liquid droplets is completed on the substrate W in a region extending along the main scanning direction with a predetermined width (a width that can be ejected by the head unit 111).
[0053]
Thereafter, by moving the main carriage 102, the head unit 111 is moved in the sub-scanning direction (X-axis direction) by the predetermined width. In this state, similar to the above-described operation, a selective droplet discharge operation from each droplet discharge head 111 to the substrate W is performed while moving the substrate W in the main scanning direction. When the liquid droplet ejection operation to this region is completed, the head unit 111 is further moved in the sub-scanning direction (X-axis direction) by the predetermined width, and the substrate W is moved in the main scanning direction. However, a similar droplet discharge operation is performed. By repeating this several times, droplet discharge is performed on the entire region of the substrate W. In this manner, the droplet discharge device 1 forms (draws) a predetermined pattern on the substrate W.
[0054]
9 is a perspective view showing a tank unit in the droplet discharge device shown in FIGS. 1 and 2, and FIG. 10 is a schematic view of a liquid supply device and a drain device in the droplet discharge device shown in FIGS. FIG. 11 is a diagram schematically showing the configuration of the liquid amount detection means. Hereinafter, based on these drawings and FIG. 6, the discharge liquid supply device (liquid supply device) 4, the cleaning liquid supply device (liquid supply device) 5, the capping liquid discharge device 17, and the liquid discharge device 18 in the droplet discharge device 1. explain.
[0055]
First, the discharge liquid supply device 4 that supplies the discharge liquid discharged from the droplet discharge head 111 will be described. As shown in FIG. 10, the discharge liquid supply device 4 includes a first discharge liquid tank (supply tank) 401 and a second discharge liquid tank (supply tank) 402 that store discharge liquid, and a first discharge. An outflow pipe (outflow passage) 403 connected to the liquid tank 401, an outflow pipe (outflow passage) 404 connected to the second discharge liquid tank 402, a three-way valve (flow passage switching means) 405, A pressurizing means 406 for supplying pressurized gas into the first discharge liquid tank 401 and the second discharge liquid tank 402, a pressure pipe (pressure path) 407 connected to the first discharge liquid tank 401, A pressurizing pipe (pressurizing path) 408 connected to the second discharge liquid tank 402 and a three-way valve (pressurizing path switching means) 409 are provided.
[0056]
As the pressurizing means 406, for example, a pressurized gas supply source that supplies a gas such as pressurized nitrogen gas is used. A pipe (path) 410 from the pressurizing means 406 and pressurizing pipes 407 and 408 are connected to the three-way valve 409, respectively. The three-way valve 409 can be switched between a state in which the pipe 410 and the pressure pipe 407 are connected and a state in which the pipe 410 and the pressure pipe 408 are connected. As a result, the inside of the first discharge liquid tank 401 or the second discharge liquid tank 402 can be selectively pressurized by the pressurizing means 406. The three-way valve 409 is automatically switched by an actuator (not shown).
[0057]
The three-way valve 405 is connected to a liquid supply pipe (liquid supply flow path) 411 and outflow pipes 403 and 404 that go to the head unit 11 side. The three-way valve 405 can be switched between a state in which the liquid supply pipe 411 and the outflow pipe 403 are connected and a state in which the liquid supply pipe 411 and the outflow pipe 404 are connected. As a result, the discharge liquid can be selectively supplied from the first discharge liquid tank 401 or the second discharge liquid tank 402 to the liquid supply pipe 411. The three-way valve 405 is automatically switched by an actuator (not shown).
[0058]
As shown in FIG. 6, the other end of the liquid supply pipe 411 extending from the three-way valve 405 is connected to a secondary tank 412 installed on the main carriage 102. In the middle of the flexible liquid supply pipe 411, the liquid supply pipe 411 is moved so that the portion on the secondary tank 412 side of the liquid supply pipe 411 can move in accordance with the movement of the secondary tank 412 that moves with the main carriage 102. A relay unit 413 that relays the pipe 411 is provided.
[0059]
One end of twelve branch pipes 414 corresponding to each of the twelve droplet discharge heads 111 is connected to the secondary tank 412, and the other end of these branch pipes 414 is provided in the head unit 11. The twelve inlets 112 corresponding to the respective droplet discharge heads 111 are respectively connected. In FIG. 6, only two of the twelve branch pipes 414 are shown for easy viewing.
[0060]
A shutoff valve 415 is provided in the middle of each branch pipe 414. The discharged liquid that has passed through the liquid supply pipe 411 flows into the secondary tank 412, is pressure-adjusted in the secondary tank 412, and then is supplied to each droplet discharge head 111 through each branch pipe 414. The shutoff valve 415 shuts off the flow path of the branch pipe 414 when the negative pressure control unit that adjusts the pressure in the secondary tank 412 does not function for some reason, and the droplet discharge head located at a position lower than the secondary tank 412 It is possible to prevent the discharge liquid from continuing to flow from the secondary tank 412 to 111 and leaking from the droplet discharge head 111.
[0061]
As shown in FIG. 9, the first discharge liquid tank 401 and the second discharge liquid tank 402 of the discharge liquid supply device 4 are each installed in the tank unit 13. The tank unit 13 has a rack (shelf) 131 that supports a plurality of tanks, and the first discharge liquid tank 401 and the second discharge liquid tank 402 are detachably installed on the rack 131, respectively. Yes. As a result, when the first discharge liquid tank 401 and the second discharge liquid tank 402 become empty, they can be removed and replaced or replenished. The replacement of the first discharge liquid tank 401 and the second discharge liquid tank 402 can be performed from the outside of the chamber 91 by opening a door 918 provided on the outer wall of the separate chamber 916 of the chamber 91 (see FIG. 1). ). The individual capacities of the first discharge liquid tank 401 and the second discharge liquid tank 402 are not particularly limited. However, it is possible to take into consideration both the ease of replacement work and the securing of the capacity of the discharge liquid supply device 4 as a whole. Therefore, it is preferably about 1 to 10 liters, more preferably about 3 to 5 liters.
[0062]
As shown in FIG. 11A, the discharge liquid supply device 4 further includes a liquid amount detection unit 416 that detects the liquid amount inside the first discharge liquid tank 401. The liquid amount detection means 416 is provided along the vertical direction outside the first discharge liquid tank 401, and has a light-transmitting tube 417 whose lumen communicates with the first discharge liquid tank 401, A light projecting unit 418 and a light receiving unit 419 are provided so as to face each other across the tube 417 in the vicinity of the bottom of one discharge liquid tank 401. When the amount of liquid in the first discharge liquid tank 401 is reduced due to a change in the amount of light received by the light receiving unit 419, the liquid amount detecting means 416 is changed to a predetermined lower limit level E (empty state). Can be detected. The detection result of the liquid amount detection means 416 is input to the control device 16.
In addition, the discharge liquid supply device 4 includes a similar liquid amount detection means 420 that detects the amount of liquid inside the second discharge liquid tank 402. When the amount of liquid in the second discharge liquid tank 402 decreases and reaches a predetermined lower limit level E, the liquid amount detection means 420 detects this and inputs the detection result to the control device 16.
[0063]
In the state shown in FIG. 10, the discharge liquid supply device 4 is pressurized in the first discharge liquid tank 401 by the pressurizing means 406, and the discharge liquid in the first discharge liquid tank 401 is caused by this pressure. Then, the liquid is delivered through the outflow pipe 403 and the liquid supply pipe 411 and supplied to the droplet discharge head 111.
When the discharge liquid in the first discharge liquid tank 401 is consumed and the liquid amount detecting means 416 detects that the first discharge liquid tank 401 is empty, the control device 16 detects the detection result. The three-way valve 405 and the three-way valve 409 are switched based on the above. Thereby, the pressurizing means 406 pressurizes the inside of the second discharge liquid tank 402, and the discharge liquid in the second discharge liquid tank 402 is sent out through the outflow pipe 404 and the liquid supply pipe 411 by this pressure. Then, the state is switched to the state of being supplied to the droplet discharge head 111.
[0064]
While the discharge liquid is being supplied from the second discharge liquid tank 402, the operator removes the empty first discharge liquid tank 401 from the rack 131, refills the discharge liquid, and then enters the rack 131. return. Thereafter, when the liquid amount detection means 420 detects that the second discharge liquid tank 402 has become empty, the control device 16 switches the three-way valve 405 and the three-way valve 409 to discharge from the first discharge liquid tank 401. Switch to supplying liquid. Then, while the discharge liquid is being supplied from the first discharge liquid tank 401, the operator removes the empty second discharge liquid tank 402 from the rack 131 and refills the discharge liquid.
[0065]
When the first discharge liquid tank 401 is emptied and when the second discharge liquid tank 402 is emptied, the control device 16 notifies that and replaces the tank (discharge liquid It is preferable to prompt the operator to replenish. Examples of the notification method include a method of displaying characters or graphics on an operation panel (not shown) or making a sound or a sound. Also, when the first discharge liquid tank 401 is emptied and when the second discharge liquid tank 402 is emptied, the characters, figures, sounds, voices, etc. for notification are made different. It is preferable to know whether the discharge liquid tank is empty.
[0066]
The discharge liquid supply device 4 as described above is used while switching between the first discharge liquid tank 401 and the second discharge liquid tank 402, so that the capacity can be increased as a whole, and the droplet discharge apparatus 1 Therefore, it is possible to effectively cope with an increase in the amount of discharged liquid consumption accompanying the increase in size of the liquid. Further, since the entire capacity can be increased without increasing the capacity of each of the first discharge liquid tank 401 and the second discharge liquid tank 402, the first discharge liquid tank 401 and the second discharge liquid tank It is possible to avoid an excessive increase in the weight of the tank 402 (particularly, the weight at the time of filling), and it is possible to reduce the burden on the operator when the tank is replaced.
[0067]
Further, by alternately exchanging (replenishing) the first discharge liquid tank 401 and the second discharge liquid tank 402, the discharge liquid can be replenished without stopping the operation of the droplet discharge device 1. . Therefore, the production efficiency can be improved and a high production amount (throughput) can be obtained. In addition, when a large amount of discharge liquid is consumed, such as during initial filling of the discharge liquid, there is no time loss due to tank replacement work.
[0068]
In the present invention, three or more discharge liquid tanks (supply tanks) are provided, and the discharge liquid is switched so that the discharge liquid is supplied from one discharge liquid tank (supply tank) selected from these. It may be. Further, the flow path switching means such as the three-way valve 405 and the pressurization path switching means such as the three-way valve 409 are not limited to those configured to be switched automatically, but may be switched manually. Further, the method of feeding the discharge liquid is not limited to the method of pressurizing the inside of the discharge liquid tank, and the liquid may be sent by suction with a suction pump.
[0069]
Next, the cleaning liquid supply apparatus 5 that supplies the cleaning liquid used in the cleaning unit (cleaning apparatus) 122 that cleans the droplet discharge head 111 will be described, but the description of the same matters as the discharge liquid supply apparatus 4 will be omitted. . As shown in FIG. 10, the cleaning liquid supply device 5 includes a first cleaning liquid tank (supply tank) 501 and a second cleaning liquid tank 502 that are detachably installed in the rack 131 and store the cleaning liquid. Outflow piping (outflow passage) 503 connected to the cleaning liquid tank 501, outflow piping (outflow passage) 504 connected to the second cleaning liquid tank 502, outflow piping 503 and 504, and liquid supply to the cleaning unit 122 A three-way valve (flow path switching means) 505 to which a pipe (liquid supply flow path) 511 is connected, and a pressure means for supplying pressurized gas into the first cleaning liquid tank 501 and the second discharge liquid tank 502. 506, a pressure pipe (pressure path) 507 connected to the first cleaning liquid tank 501, a pressure pipe (pressure path) 508 connected to the second cleaning liquid tank 502, The three-way valve (pressure path switching means) 509 to which the pipes 507 and 508 and the pipe (path) 510 from the pressurizing means 506 are connected respectively, and the remaining liquid in the first cleaning liquid tank 501 and the second cleaning liquid tank 502 Liquid amount detecting means (not shown) for detecting the amount.
[0070]
As the pressurizing means 506, for example, a pressurized gas supply source that supplies a gas such as pressurized nitrogen gas is used. Further, the pressurizing unit 406 and the pressurizing unit 506 may be shared without being provided separately. The cleaning liquid supplied from the liquid supply channel 511 to the cleaning unit 122 is ejected from the nozzles installed in the cleaning unit 122 and impregnates a wiping sheet that wipes off the nozzle formation surface of the droplet discharge head 111.
Since such a cleaning liquid supply device 5 is used while switching between the first cleaning liquid tank 501 and the second cleaning liquid tank 502 by switching the three-way valves 505 and 509, similarly to the discharge liquid supply device 4. The same effect as the discharge liquid supply device 4 is exhibited.
[0071]
Next, the capping drainage device 17 for collecting the drainage (discharge fluid) from the capping unit (capping device) 121 for capping the droplet ejection head 111 will be described. Will not be described. As shown in FIG. 10, the capping drainage device 17 is detachably installed in a rack 131 and includes a first drainage tank 171 and a second drainage tank 172 that store drainage collected from the capping unit 121. An inflow pipe (inflow path) 173 connected to the first drainage tank 171; an inflow pipe (inflow path) 174 connected to the second drainage tank 172; and a three-way valve (flow path switching) Means) 175. The three-way valve 175 is connected to a drain pipe (drain path) 176 from the capping unit 121 and inflow pipes 173 and 174, respectively. The three-way valve 175 can be switched between a state in which the drainage pipe 176 and the inflow pipe 173 are connected and a state in which the drainage pipe 176 and the inflow pipe 174 are connected. Thereby, the drainage from the capping unit 121 can be selectively introduced into the first drainage tank 171 or the second drainage tank 172. The three-way valve 175 is automatically switched by an actuator (not shown).
[0072]
As shown in FIG. 11 (b), the capping drainage device 17 further includes a liquid amount detection means 177 that detects the amount of liquid inside the first drainage tank 171. The liquid amount detection means 177 is provided along the vertical direction outside the first drainage tank 171, and has a light-transmitting tube 178 whose lumen communicates with the first drainage tank 171. It is composed of a light projecting unit 179 and a light receiving unit 170 installed so as to face each other with a tube 178 sandwiched between the top of one drainage tank 171. When the amount of liquid in the first drainage tank 171 increases due to a change in the amount of light received by the light receiving unit 170, the liquid amount detection unit 177 detects that when the liquid amount detection unit 177 reaches a predetermined upper limit level F (full state) Can be detected. The detection result of the liquid amount detection means 177 is input to the control device 16. Further, the capping drainage device 17 further includes a similar liquid amount detection unit 177 that detects the amount of liquid inside the second drainage tank 171.
[0073]
In such a capping drainage device 17, in the state shown in FIG. 10, the drainage from the capping unit 121 is sucked into a suction pump (not shown) and introduced into the first drainage tank 171. When the drainage liquid in the first drainage tank 171 accumulates and the liquid amount detection means 177 detects that the first drainage tank 171 is full, the control device 16 detects the detection result. Is switched to the state in which the drainage is introduced into the second drainage tank 172.
[0074]
When the first drainage tank 171 is full and when the second drainage tank 172 is full, the control device 16 notifies that fact by the same method as described above, for example. It is preferable to prompt the operator to change the tank (collect the drainage). Since the drainage liquid collected by the capping drainage device 17 is a discharge liquid in a relatively clean state, it is reused.
[0075]
Since the capping drainage device 17 as described above is used while switching between the first drainage tank 171 and the second drainage tank 172, the capacity can be increased as a whole, and the droplet discharge device 1. It is possible to effectively cope with an increase in the amount of drainage accompanying the increase in size of the liquid. In addition, since the entire capacity can be increased without increasing the capacity of each of the first drain tank 171 and the second drain tank 172, the first drain tank 171 and the second drain tank It is possible to prevent the tank 172 from becoming too heavy (particularly, the weight when full), and to reduce the burden on the operator during tank replacement work.
Further, by alternately exchanging (collecting) the first drainage tank 171 and the second drainage tank 172, the drainage liquid can be collected without stopping the operation of the droplet discharge device 1. . Therefore, the production efficiency can be improved and a high production amount (throughput) can be obtained.
[0076]
Next, the liquid draining device 18 that collects the liquid discharged (discharged liquid) discarded from the droplet discharge head 111 in the pre-drawing flushing unit 104, the regular flushing unit 123, and the dot dropout detection unit 19 will be described. Description of the same matters as the drainage device 17 is omitted. As shown in FIG. 10, the drainage device 18 is detachably installed on the rack 131 (not shown in FIG. 9), and includes a first drainage tank 181 that stores the discarded and discharged drainage. A second drainage tank 182, an inflow pipe (inflow path) 183 connected to the first drainage tank 181, an inflow pipe (inflow path) 184 connected to the second drainage tank 182, And a three-way valve (flow path switching means) 185. The three-way valve 185 is connected to drain pipes (drain channels) 186 from the pre-drawing flushing unit 104, the regular flushing unit 123, and the dot drop detection unit 19, and inflow pipes 183 and 184, respectively. Further, the drainage device 18 further includes liquid amount detection means (not shown) for detecting the liquid amounts inside the first drainage tank 181 and the second drainage tank 182, respectively.
According to such a drainage device 18, the same effect as the capping drainage device 17 can be obtained. The drainage liquid collected by the drainage device 18 is used for disposal or reuse.
[0077]
As described above, according to the present invention, since the operation of the droplet discharge device can be continued even when the liquid supply tank such as the discharge liquid tank and the cleaning liquid tank and the drainage tank are replaced, the production efficiency is improved. In addition, a high production volume (throughput) can be obtained, which is suitable for mass production of substrates and can be reduced in manufacturing cost. In addition, since the capacity of each tank can be increased without increasing the capacity of each tank, the amount of liquid supply accompanying the increase in the size of the droplet discharge device can be increased without increasing the burden on the operator during tank replacement work. It is possible to effectively cope with an increase in the amount of drainage.
[0078]
As described above, the embodiment of the droplet discharge device of the present invention has been described, but the present invention is not limited to this, and each part constituting the liquid supply device, the liquid discharge device, and the droplet discharge device includes: It can be replaced with any structure capable of performing the same function. Moreover, arbitrary components may be added.
In the present embodiment, the liquid amount detecting means for detecting the liquid amount in the tank detects that the liquid amount (liquid level) has reached a predetermined lower limit level or upper limit level. The liquid amount detection means may be capable of always detecting a change in the liquid amount (liquid level).
[0079]
In addition, the configuration of the liquid amount detection means is not limited to the configuration shown in the figure, for example, a configuration for detecting the liquid amount by the height of a float (float) provided in the tank, or a liquid amount by measuring the weight of the tank Any configuration may be used, such as a configuration for detecting the amount of liquid, or a method for detecting the amount of liquid by measuring the flow rate flowing out from or into the tank with an integrating flow meter.
[0080]
In the droplet discharge device according to the present invention, the head unit (droplet discharge head) is fixed with respect to the device main body, and the substrate (workpiece) is moved in the Y-axis direction and the X-axis direction, respectively. It may be configured to perform scanning. Conversely, the substrate (work) is fixed to the apparatus main body, and the head unit (droplet discharge head) is moved in the Y-axis direction and the X-axis direction, respectively, so that main scanning and sub-scanning are performed. It may be configured. In other words, the droplet discharge device according to the present invention may be any device that is configured to relatively move the workpiece mounting portion and the droplet discharge head.
For example, the Y-axis direction moving mechanism and the X-axis direction moving mechanism may be, for example, a ball screw (feed screw) instead of the linear motor.
[0081]
The electro-optical device of the present invention is manufactured using the droplet discharge device of the present invention as described above. Specific examples of the electro-optical device of the present invention are not particularly limited, and examples thereof include a liquid crystal display device and an organic EL display device.
In addition, the electro-optical device manufacturing method of the present invention uses the droplet discharge device of the present invention. The electro-optical device manufacturing method of the present invention can be applied to, for example, a liquid crystal display device manufacturing method. That is, a liquid containing a filter material of each color is selectively discharged onto the substrate using the droplet discharge device of the present invention, thereby producing a color filter having a large number of filter elements arranged on the substrate. A liquid crystal display device can be manufactured using a color filter. In addition, the electro-optical device manufacturing method of the present invention can be applied to, for example, an organic EL display device manufacturing method. That is, an organic material in which a large number of pixel pixels including an EL light emitting layer are arranged on a substrate by selectively discharging a liquid containing a light emitting material of each color onto the substrate using the droplet discharge device of the present invention. An EL display device can be manufactured.
According to another aspect of the invention, there is provided an electronic apparatus including the electro-optical device manufactured as described above. Specific examples of the electronic apparatus of the present invention are not particularly limited, and examples thereof include a personal computer and a mobile phone on which the liquid crystal display device and the organic EL display device manufactured as described above are mounted.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a droplet discharge device of the present invention.
FIG. 2 is a side view showing an embodiment of a droplet discharge device of the present invention.
FIG. 3 is a plan view showing a gantry, a stone surface plate, and a substrate table.
FIG. 4 is a side view showing a gantry, a stone surface plate, and a substrate table.
FIG. 5 is a plan view showing a head unit and an X-axis direction moving mechanism.
6 is a side view seen from the direction of arrow A in FIG.
7 is a front view seen from the direction of arrow B in FIG.
FIG. 8 is a schematic plan view showing a configuration of a head unit and a droplet discharge operation.
FIG. 9 is a perspective view showing a tank unit.
FIG. 10 is a piping system diagram schematically showing a liquid supply device and a drainage device.
FIG. 11 is a diagram schematically illustrating a configuration of a liquid amount detection unit.
[Explanation of symbols]
4 ... Discharge liquid supply device 401 ... First discharge liquid tank 402 ... Second discharge liquid tank 403 ... Outflow piping 404 ... Outflow piping 405 ... Three-way valve 406 ... Addition Pressure means, 407... Pressurizing piping, 408... Pressurizing piping, 409... Three-way valve, 410. , 502... Second cleaning liquid tank, 503 .. Outflow piping, 504 .. Outflow piping, 505... Three-way valve, 506. ... Three-way valve, 510 ... Pipe, 511 ... Supply pipe, 17 ... Capping drain device, 171 ... First drain tank, 172 ... Second drain tank, 173 ... Inlet pipe 174 ... Inflow piping, 175 ... Three-way valve, 176 ... Drainage Pipe 18, drainage device 181, first drain tank 182 second drain tank 183 inflow pipe 184 inflow pipe 185 three-way valve 186 Drainage piping

Claims (12)

A liquid supply device for supplying liquid;
A drainage device for collecting drainage;
A workpiece placement unit capable of placing a workpiece;
A droplet discharge head for discharging droplets to the workpiece placed on the workpiece placement unit;
A droplet discharge device that includes a moving mechanism that relatively moves the workpiece placement unit and the droplet discharge head, and is used to manufacture a color filter or an organic EL display device,
The liquid supply device includes a plurality of liquid supply tanks for storing liquids to be supplied;
An outflow passage connected to each of the plurality of liquid supply tanks;
A flow path switching means for connecting an outflow flow path corresponding to one liquid supply tank selected from the plurality of liquid supply tanks to the liquid supply path toward the liquid supply destination;
For each of the liquid supply tanks, a liquid amount detection means for detecting the amount of liquid in the liquid supply tank,
The drainage device includes a plurality of drainage tanks for storing the collected drainage,
An inflow channel connected to each of the plurality of drainage tanks;
A flow path switching means for connecting an inflow path corresponding to one drainage tank selected from the plurality of drainage tanks to a drainage path from the drainage collection destination;
With respect to each drainage tank, provided with a liquid amount detection means for detecting the liquid amount in the drainage tank,
The plurality of liquid supply tanks include a first liquid supply tank and a second liquid supply tank,
When the first liquid supply tank is emptied and when the second liquid supply tank is emptied, the fact is notified by letters, figures, sounds or sounds, respectively.
When the first liquid supply tank is emptied and when the second liquid supply tank is emptied, the notification character, figure, sound, or voice is made different, and the first liquid supply tank is emptied. It is configured so that it can be understood which one of the liquid supply tank and the second liquid supply tank is empty,
The plurality of drainage tanks include a first drainage tank and a second drainage tank,
When the first drainage tank is full and when the second drainage tank is full, respectively, this is notified by letters, figures, sounds or voices,
When the first drainage tank is full and when the second drainage tank is full, the notification character, figure, sound, or voice is different, and the first drainage tank is full. A liquid droplet ejection apparatus configured to recognize which one of the drainage tank and the second drainage tank is full.   The droplet discharge device according to claim 1, wherein at least one of the plurality of liquid supply tanks is replaceable.   The droplet discharge apparatus according to claim 1, wherein the liquid to be supplied is a liquid discharged from the droplet discharge head.   The droplet discharge device according to claim 1, wherein the liquid to be supplied is a cleaning liquid used in a cleaning device that cleans the droplet discharge head.   5. The control device according to claim 1, further comprising a control unit that controls the operation of the flow path switching unit of the liquid supply device based on a detection result of each of the liquid amount detection units that detects a liquid amount in the liquid supply tank. The droplet discharge device according to 1.   The droplet discharge device according to claim 1, further comprising a pressurizing unit capable of pressurizing the inside of each liquid supply tank. A pressure path connected to each of the liquid supply tanks;
The liquid droplet ejection apparatus according to claim 6, further comprising: a pressure path switching unit that connects one pressure path selected from the plurality of pressure paths to the path from the pressure unit.   The droplet discharge device according to claim 1, wherein at least one of the plurality of drainage tanks is replaceable.   The droplet discharge device according to claim 1, wherein the drainage liquid is a liquid recovered from a capping device for capping the droplet discharge head.   The droplet discharge device according to any one of claims 1 to 8, wherein the drainage liquid is a liquid discharged by discard discharge and / or dot dropout inspection of the droplet discharge head.   11. The control unit according to claim 1, further comprising a control unit that controls the operation of the flow path switching unit of the drainage device based on a detection result of each of the liquid level detection units that detects a liquid amount in each of the drainage tanks. A droplet discharge device according to claim 1.   The predetermined pattern is formed on the workpiece by ejecting droplets from the droplet ejection head while relatively moving the workpiece mounting portion and the droplet ejection head. The droplet discharge device according to 1.

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