CN110271295B - OLED ink-jet printing device and control method thereof - Google Patents

OLED ink-jet printing device and control method thereof Download PDF

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Publication number
CN110271295B
CN110271295B CN201910643350.2A CN201910643350A CN110271295B CN 110271295 B CN110271295 B CN 110271295B CN 201910643350 A CN201910643350 A CN 201910643350A CN 110271295 B CN110271295 B CN 110271295B
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tank
ink
valve
solvent
supply
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CN110271295A (en
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邴一飞
吴聪原
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16552—Cleaning of print head nozzles using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects

Abstract

The present disclosure provides a control method for an organic light emitting diode inkjet printing apparatus, including step S1, closing a first valve between a first supply tank and an ink converting tank; step S2, opening a second valve between the first solvent tank and the ink conversion tank and a third valve between the ink conversion tank and the ink tank, and printing for cleaning; step S3, closing the second valve and the third valve, opening a fourth valve between the ink conversion tank and the waste ink tank, and removing the solvent in the ink conversion tank through the meniscus controller; step S4, opening a fifth valve and a third valve between the second solvent tank and the ink conversion tank for printing and cleaning; step S5, closing a fifth valve between the second solvent tank and the ink conversion tank, opening a fourth valve, and removing the solvent in the ink conversion tank through the meniscus controller; and step S6, opening the sixth valve and the third valve between the second supply tank and the ink conversion tank to perform printing cleaning.

Description

OLED ink-jet printing device and control method thereof
Technical Field
The invention relates to the technical field of display, in particular to an OLED ink-jet printing device and a control method thereof.
Background
An organic light-emitting diode (OLED) is a novel current-type semiconductor light-emitting device, and belongs to an autonomous light-emitting technology, and compared with a passive light-emitting Liquid Crystal Display (LCD), an OLED applied in the display technology field has the advantages of fast response speed, high contrast, wide viewing angle, and the like, and is easy to realize flexible display, so that the OLED display is very likely to become a mainstream product of the next generation display technology.
The fabrication of good performance OLED devices and panels thereof requires the use of many complex equipment, and requires a relatively clean production environment and equipment cleaning in view of yield. At present, the most common preparation method is Vacuum Thermal Evaporation (VTE), that is, organic small molecule materials are heated in a vacuum chamber and sublimated or melted and gasified into material vapor, and the material vapor is deposited on a glass substrate through an opening of a metal mask. The vacuum deposition film-forming method is limited by the size of a vacuum cavity and a mask, so that the mass production speed of OLED devices and panels thereof with large areas is limited, and the ink-jet printing technology is applied to the technical field of display.
Compared with vacuum thermal evaporation, the ink-jet printing has some important advantages, mainly in that the working principle of the ink-jet printing is to eject ink from a tiny nozzle to a specified position of a printing stock under the control of a computer, and finally, a pre-designed pattern is formed. The material utilization rate of ink-jet printing can reach one hundred percent, the process cycle time can be reduced through the increase of the number of the spray heads, and the process can be directly applied to the substrate with larger size in an enlarged mode. In addition, the process cost of ink-jet printing is lower because a vacuum process environment does not need to be established.
The current OLED device and the panel thereof are composed of light emitting structures of three colors of red, green and blue, and the whole OLED light emitting layer can be manufactured only by using more than three kinds of ink and corresponding ink-jet printing processes. In the conventional printer, only one type of ink can be used for one type of nozzle, and each type of ink needs to be provided with a separate printing head for printing, which increases the cost of the inkjet printing device to some extent. In addition, generally, when the printing system is used for replacing other types of ink, the ink material needs to be manually replaced, which is very inconvenient and seriously affects the productivity of the equipment, and when the ink material is replaced, all the ink in the whole ink supply system needs to be replaced, so that the cost is high, and the labor cost and the maintenance cost of the manufacturing process are increased.
Disclosure of Invention
In order to solve the problem of the requirement of OLED (organic light-emitting diode) ink-jet printing on various inks, simplify the technological process of ink-jet printing and reduce the technological cost and the maintenance cost, the invention provides an OLED ink-jet printing device which can automatically clean a spray head and replace the inks. The OLED ink-jet printing device can solve the problem of the requirement of various inks in the OLED ink-jet process, and reduce the equipment cost and the process cost.
The embodiment of the invention provides an OLED ink-jet printing device, which comprises:
the printing head is used for printing the OLED material on a substrate; the ink tank is connected with the printing head; the ink conversion tank is connected with the ink tank; a plurality of supply tanks connected to the ink transfer tank; a plurality of solvent tanks connected to the ink transfer tank; a waste ink tank connected to the ink transfer tank; a meniscus controller connected to the ink conversion tank; and a plurality of valves respectively connected between the ink transfer tank and the ink tank, between the supply tank and the ink transfer tank, between the solvent tank and the ink transfer tank, between the waste ink tank and the ink transfer tank, and between the meniscus controller and the ink transfer tank; wherein, the opening and/or closing of the valve can control the cleaning of the printing head so as to facilitate the printing of the printing head for the OLED materials with different colors.
In one embodiment of the present invention, wherein the supply grooves include a first supply groove, a second supply groove, and a third supply groove, the solvent tank includes a first solvent tank, a second solvent tank, and a third solvent tank, the plurality of valves includes a first valve connected between the first supply tank and the ink transfer tank, a second valve connected between the first solvent tank and the ink transfer tank, a third valve connected between the ink transfer tank and the ink tank, a fourth valve connected between the waste ink tank and the ink transfer tank, a fifth valve connected between the second solvent tank and the ink transfer tank, a sixth valve connected between the second supply tank and the ink transfer tank, a seventh valve connected between the third supply tank and the ink transfer tank, and an eighth valve connected between the third solvent tank and the ink transfer tank.
In one embodiment of the present invention, the first supply tank has red ink, the second supply tank has green ink, and the third supply tank has blue ink.
In one embodiment of the present invention, the first solvent tank has a solvent for cleaning the red ink, the second solvent tank has a solvent for cleaning the green ink, and the third solvent tank has a solvent for cleaning the blue ink.
The embodiment of the invention also provides a control method for the OLED ink-jet printing device, which comprises a printing head, a control unit and a control unit, wherein the printing head is used for printing the OLED material on a substrate; the ink tank is connected with the printing head; the ink conversion tank is connected with the ink tank; a plurality of supply tanks connected to the ink transfer tank; a plurality of solvent tanks connected to the ink transfer tank; a waste ink tank connected to the ink transfer tank; a meniscus controller connected to the ink conversion tank; and a plurality of valves respectively connected between the ink transfer tank and the ink tank, between the supply tank and the ink transfer tank, between the solvent tank and the ink transfer tank, between the waste ink tank and the ink transfer tank, and between the meniscus controller and the ink transfer tank, comprising the steps of:
step S1, closing the first valve between the first supply tank and the ink conversion tank;
step S2, opening the second valve between the first solvent tank and the ink conversion tank and the third valve between the ink conversion tank and the ink tank, and performing printing cleaning;
step S3, closing the second valve and the third valve, opening the fourth valve between the ink conversion tank and the waste ink tank, and removing the solvent in the ink conversion tank by the meniscus controller;
step S4, opening the fifth valve and the third valve between the second solvent tank and the ink conversion tank, and performing printing cleaning;
step S5, closing the fifth valves of the second solvent tank and the ink conversion tank 30, opening the fourth valve, and removing the solvent in the ink conversion tank by the meniscus controller; and
step S6 is to open the sixth valve and the third valve between the second supply tank and the ink conversion tank to perform printing cleaning.
In an embodiment of the invention, the performing printing cleaning in step S2 includes cleaning the print head by printing for 1 to 10 minutes.
In an embodiment of the invention, the performing printing cleaning in step S4 includes cleaning the print head by printing for 1 to 10 minutes.
In an embodiment of the invention, the performing printing cleaning in step S6 includes cleaning the print head by printing for 1 to 10 minutes.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the present disclosure, the drawings needed to be used in the description of the embodiments or the present disclosure will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an OLED (organic light-emitting diode) inkjet printing apparatus according to an embodiment of the invention; and
FIG. 2 shows a method for controlling an OLED inkjet printing apparatus according to an embodiment of the present invention; and
fig. 3 is a schematic structural diagram of an OLED inkjet printing apparatus according to another embodiment of the present invention.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be implemented by the application. Directional phrases used in this application, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In the drawings, elements having similar structures are denoted by the same reference numerals.
In order to enable an organic light-emitting diode (OLED) inkjet printing device to have ink replacement and automatic cleaning functions, the OLED inkjet printing device provided by the invention is provided with a plurality of solvent tanks, a supply tank and an ink conversion tank, and controls valves among the solvent tanks, the supply tank and the ink conversion tank to control different types of ink to enter the ink tanks so as to realize the functions of automatically replacing the ink and automatically cleaning a nozzle.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an OLED inkjet printing apparatus 500 according to an embodiment of the present invention, where the OLED inkjet printing apparatus 500 includes: printhead 10 is connected to ink tank 20, ink tank 20 is connected to ink transfer tank 30, ink transfer tank 30 is further connected to waste ink tank 200, the input of ink transfer tank 30 is connected to first and second supply tanks 40 and 60, first and second solvent tanks 50 and 70, and meniscus controller 100, and, the third valve 25 is connected between the ink tank 30 and the ink tank 20, the first valve 45 is connected between the first supply tank 40 and the ink tank 30, the sixth valve 65 is connected between the second supply tank 60 and the ink tank 30, the second valve 55 is connected between the first solvent tank 50 and the ink tank 30, the fifth valve 75 is connected between the second solvent tank 70 and the ink tank 30, and the fourth valve 210 is connected between the waste ink tank 200 and the ink tank 30. The third valve 25 is used to control the opening and closing of the pipeline between the ink converting tank 30 and the ink tank 20, the first valve 45 is used to control the opening and closing of the pipeline between the first supplying tank 40 and the ink converting tank 30, the sixth valve 65 is used to control the opening and closing of the pipeline between the second supplying tank 60 and the ink converting tank 30, the second valve 55 and the fifth valve 75 are used to control the opening and closing of the pipeline between the first solvent tank 50, the second solvent tank 70 and the ink converting tank 30, the valve 110 is used to control the opening and closing of the pipeline between the meniscus controller 100 and the ink converting tank 30, and the fourth valve 210 is used to control the opening and closing of the pipeline between the waste ink tank 200 and the ink converting tank 30.
In the present embodiment, the first supply tank 40 and the second supply tank 60 are used for storing the ink a and the ink B, respectively, and the first solvent tank 50 and the second solvent tank 70 are used for storing the solvent a and the solvent B for cleaning the corresponding ink, so as to clean the ink supplied by the first supply tank 40 and the second supply tank 60. In the present embodiment, two supply tanks 40, 60 and two solvent tanks 50, 70 are illustrated, but not limited thereto, and in practical applications, three supply tanks and three solvent tanks, or four supply tanks and four solvent tanks may be provided. The number of the supply tanks and the solvent tanks depends on the kind of the ink used, or a plurality of supply tanks may be cleaned with the solvent of the same solvent tank, and the number of the supply tanks and the solvent tanks may be determined depending on the ink composition and the solvent composition for cleaning the ink. The number of valves for controlling the opening and closing of the conduits between the supply tank, the solvent tank and the ink transfer tank 30 is changed accordingly. In addition, since the meniscus controller 100 controls the ink conversion tank 30 to remove ink when ink is replaced, the number of the meniscus controllers 100 is equal to the number of the ink conversion tanks 30.
Referring to fig. 2, fig. 2 is a control method of an OLED inkjet printing apparatus 500 according to an embodiment of the present invention, referring to fig. 1, when changing ink, for example, ink a supplied from a first supply tank 40 is changed to ink B supplied from a second supply tank 60, the control method includes step S1, closing a first valve 45 between the first supply tank 40 and an ink conversion tank 30; step S2, opening the second valve 55 between the first solvent tank 50 and the ink transfer tank 30 and the third valve 25 between the ink transfer tank 30 and the ink tank 20, and performing printing cleaning; step S3, closing the second valve 55 and the third valve 25, opening the fourth valve 210 between the ink conversion tank 30 and the waste ink tank 200, and removing the solvent in the ink conversion tank 30 by the meniscus controller 100; step S4, opening the fifth valve 75 and the third valve 25 between the second solvent tank 70 and the ink transfer tank 30, and performing printing cleaning; step S5, closing the fifth valve 75 between the second solvent tank 70 and the ink conversion tank 30, opening the fourth valve 210, and removing the solvent in the ink conversion tank 30 by the meniscus controller 100; and step S6, opening the sixth valve 65 and the third valve 25 between the second supply tank 60 and the ink transfer tank 30, and performing print cleaning. The OLED inkjet printing device 500 is prepared for the printing operation of ink B through the above steps, as described in detail below.
Step S1, closing the first valve 45 between the first supply tank 40 and the ink transfer tank 30;
step S2, opening the second valve 55 between the first solvent tank 50 and the ink transfer tank 30, and opening the third valve 25 between the ink transfer tank 30 and the ink tank 20, and then cleaning the print head 10 by printing for 1-10 minutes;
step S3, closing the second valve 55 and the third valve 25 between the first solvent tank 50 and the ink conversion tank 30, opening the fourth valve 210 between the ink conversion tank 30 and the waste ink tank 200, and removing the solvent in the ink conversion tank 30 by the meniscus controller 100;
step S4, opening the fifth valve 75 between the second solvent tank 70 and the ink transfer tank 30, opening the third valve 25 between the ink transfer tank 30 and the ink tank 20, and then cleaning the print head 10 by printing for 1-10 minutes;
step S5, closing the fifth valve 75 between the second solvent tank 70 and the ink transfer tank 30, opening the fourth valve 210 between the ink transfer tank 30 and the waste ink tank 200, and removing the solvent in the ink transfer tank 30 by the meniscus controller 100; and
step S6 is to open the sixth valve 65 between the second supply tank 60 and the ink conversion tank 30, open the third valve 25 between the ink conversion tank 30 and the ink tank 20, and then the print head 10 is cleaned by printing for 1 to 10 minutes.
The ink a supplied from the first supply tank 40 by the printhead 10 is changed to the ink B supplied from the second supply tank 60 by the steps S1 to S6, and the cleaning of the printhead 10, the ink tank 20, and the spaces between the first supply tank 40 and the ink tank 20 is completed at the same time, thereby eliminating the problem of ink residue. The valve 110 for controlling the opening and closing of the pipeline between the meniscus controller 100 and the ink converting tank 30 is kept in a normally open state when the OLED inkjet printing apparatus 500 is in operation.
By the control method, automatic replacement and cleaning of various inks can be realized, and the time, labor and material cost consumption of the manufacturing process is reduced to a great extent.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an OLED inkjet printing apparatus 700 according to another embodiment of the present invention, which includes three supply tanks 40, 60, and 80 and three solvent tanks 50, 70, and 90 for supplying three different inks.
The OLED inkjet printing apparatus 700 of the present embodiment includes a printhead 10 connected to an ink tank 20, the ink tank 20 connected to an ink transfer tank 30, the ink transfer tank 30 further connected to a waste ink tank 200, an input end of the ink transfer tank 30 connected to a plurality of supply tanks 40, 60, 80, a plurality of solvent tanks 50, 70, 90, and a meniscus controller 100, and a plurality of valves. The valves include a valve 25 for controlling the opening and closing of the channel between the ink converting tank 30 and the ink tank 20, valves 45, 65, 85 for controlling the opening and closing of the channel between the first supply tank 40, the second supply tank 60, the third supply tank 80 and the ink converting tank 30, valves 55, 75, 95 for controlling the opening and closing of the channel between the first solvent tank 50, the second solvent tank 70, the third solvent tank 90 and the ink converting tank 30, a valve 110 for controlling the opening and closing of the channel between the meniscus controller 100 and the ink converting tank 30, and a valve 210 for controlling the opening and closing of the channel between the waste ink tank 200 and the ink converting tank 30.
In the present embodiment, the first supply tank 40, the second supply tank 60, and the third supply tank 80 are respectively used for storing ink a, ink B, and ink C, such as red ink, green ink, and blue ink for forming a color filter. The first, second, and third solvent tanks 50, 70, and 90 store solvents a, b, and c, respectively, for cleaning the red, green, and blue inks supplied from the corresponding first, second, and third supply tanks 40, 60, and 80.
The functions of automatically replacing ink and automatically cleaning the spray head are realized by arranging a plurality of solvent tanks and supply tanks. When the ink tank works, different types of ink are controlled to enter the ink tank by controlling valves among the solvent tank, the supply tank and the ink conversion tank, so that the functions of ink replacement and automatic cleaning are realized.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.

Claims (7)

1. An OLED inkjet printing apparatus, comprising:
the printing head is used for printing the OLED material on a substrate;
the ink tank is connected with the printing head;
the ink conversion tank is connected with the ink tank;
a plurality of supply tanks connected to the ink transfer tank, the plurality of supply tanks including a first supply tank, a second supply tank, and a third supply tank;
a plurality of solvent tanks connected to the ink transfer tank, the solvent tanks including a first solvent tank, a second solvent tank, and a third solvent tank;
a waste ink tank connected to the ink transfer tank;
a meniscus controller connected to the ink conversion tank; and
a plurality of valves respectively connected between the ink transfer tank and the ink tank, between the supply tank and the ink transfer tank, between the solvent tank and the ink transfer tank, between the waste ink tank and the ink transfer tank, and between the meniscus controller and the ink transfer tank, the plurality of valves including a first valve connected between the first supply tank and the ink transfer tank, a second valve connected between the first solvent tank and the ink transfer tank, a third valve connected between the ink transfer tank and the ink tank, a fourth valve connected between the waste ink tank and the ink transfer tank, a fifth valve connected between the second solvent tank and the ink transfer tank, a sixth valve connected between the second supply tank and the ink transfer tank, and a seventh valve connected between the third supply tank and the ink transfer tank, the eighth valve is connected between the third solvent tank and the ink conversion tank;
wherein the cleaning of the print head can be controlled by opening and/or closing the plurality of valves to facilitate the print head for printing different color OLED materials.
2. The OLED inkjet printing apparatus of claim 1 wherein the first supply tank has red ink, the second supply tank has green ink, and the third supply tank has blue ink.
3. The OLED inkjet printing apparatus of claim 2 wherein the first solvent tank has a solvent to purge the red ink, the second solvent tank has a solvent to purge the green ink, and the third solvent tank has a solvent to purge the blue ink.
4. A control method for an OLED inkjet printing apparatus, the OLED inkjet printing apparatus comprising:
the printing head is used for printing the OLED material on a substrate;
the ink tank is connected with the printing head;
the ink conversion tank is connected with the ink tank;
a plurality of supply tanks connected to the ink transfer tank, the plurality of supply tanks including a first supply tank and a second supply tank;
a plurality of solvent tanks connected to the ink transfer tank, the plurality of solvent tanks including a first solvent tank and a second solvent tank;
a waste ink tank connected to the ink transfer tank;
a meniscus controller connected to the ink conversion tank; and
a plurality of valves respectively connected between the ink transfer tank and the ink tank, between the supply tank and the ink transfer tank, between the solvent tank and the ink transfer tank, between the waste ink tank and the ink transfer tank, and between the meniscus controller and the ink transfer tank, the plurality of valves including a first valve connected between the first supply tank and the ink transfer tank, a second valve connected between the first solvent tank and the ink transfer tank, a third valve connected between the ink transfer tank and the ink tank, a fourth valve connected between the waste ink tank and the ink transfer tank, a fifth valve connected between the second solvent tank and the ink transfer tank, and a sixth valve connected between the second supply tank and the ink transfer tank; characterized in that the method comprises the following steps:
step S1, closing the first valve between the first supply tank and the ink conversion tank;
step S2, opening the second valve between the first solvent tank and the ink conversion tank and the third valve between the ink conversion tank and the ink tank, and performing printing cleaning;
step S3, closing the second valve and the third valve, opening the fourth valve between the ink conversion tank and the waste ink tank, and removing the solvent in the ink conversion tank by the meniscus controller;
step S4, opening the fifth valve and the third valve between the second solvent tank and the ink conversion tank, and performing printing cleaning;
step S5, closing the fifth valves of the second solvent tank and the ink conversion tank 30, opening the fourth valve, and removing the solvent in the ink conversion tank by the meniscus controller; and
step S6 is to open the sixth valve and the third valve between the second supply tank and the ink conversion tank to perform printing cleaning.
5. The method for controlling the OLED inkjet printing apparatus according to claim 4, wherein the performing printing cleaning of the step S2 includes cleaning the print head by printing for 1-10 minutes.
6. The method for controlling the OLED inkjet printing apparatus according to claim 4, wherein the performing printing cleaning of the step S4 includes cleaning the print head by printing for 1-10 minutes.
7. The method for controlling the OLED inkjet printing apparatus according to claim 4, wherein the performing printing cleaning of the step S6 includes cleaning the print head by printing for 1-10 minutes.
CN201910643350.2A 2019-07-17 2019-07-17 OLED ink-jet printing device and control method thereof Active CN110271295B (en)

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