WO2018161546A1 - 打印设备及打印方法 - Google Patents

打印设备及打印方法 Download PDF

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Publication number
WO2018161546A1
WO2018161546A1 PCT/CN2017/103909 CN2017103909W WO2018161546A1 WO 2018161546 A1 WO2018161546 A1 WO 2018161546A1 CN 2017103909 W CN2017103909 W CN 2017103909W WO 2018161546 A1 WO2018161546 A1 WO 2018161546A1
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WO
WIPO (PCT)
Prior art keywords
printing
print head
substrate
ink
distance
Prior art date
Application number
PCT/CN2017/103909
Other languages
English (en)
French (fr)
Inventor
薛金祥
孙中元
周翔
Original Assignee
京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/069,090 priority Critical patent/US11584139B2/en
Publication of WO2018161546A1 publication Critical patent/WO2018161546A1/zh

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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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/1714—Conditioning of the outside of ink supply systems, e.g. inkjet collector cleaning, ink mist removal
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • 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
    • B41J2/17596—Ink pumps, ink valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/18—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area using fluids, e.g. gas streams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0884—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being aligned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2489—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/24—Case-shift mechanisms; Fount-change arrangements
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B05B12/006—Pressure or flow rate sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/10—Deposition of organic active material
    • H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
    • H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
    • H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing

Definitions

  • the present disclosure relates to the field of printing technology, and in particular, to a printing apparatus and a printing method.
  • the flexible OLED (Organic Light-Emitting Diode) display has become the focus of the development of the display industry.
  • the quality of OLED packaging technology determines the service life of the product, and the three-layer structure (CVD-Flatness-CVD) has become the main way of current flexible OLED packaging with its excellent performance.
  • the flat layer in the triple stack is primarily achieved by ink jet printing followed by curing.
  • the inkjet printing mainly uses a ceramic piezoelectric type print head, absorbs ink in a Draw state, and ejects ink in a Release state, and this action is controlled by a pulse voltage.
  • the ejected ink is dropped on the substrate, and each drop of ink is expanded and joined at one place, and the whole is leveled and then solidified.
  • the embodiments of the present disclosure provide a printing apparatus and a printing method to solve the problem that the particles of the ink ejected by the printing apparatus of the prior art are large, resulting in poor leveling.
  • a printing apparatus including a stage, a liquid storage tank, and a print head.
  • a stage for placing a substrate; a liquid storage tank for storing and supplying ink; a print head for atomizing the ink supplied from the liquid storage tank into ink particles, and printing the ink particles on the substrate On the print area.
  • the ink particles have a diameter of 0.5 to 10 ⁇ m.
  • the printhead includes at least one atomizing nozzle and at least one high pressure gas outlet disposed at a periphery of the atomizing nozzle.
  • the print head further includes a pressure control valve for controlling a pressure of the high pressure gas according to a distance between the print head and the substrate.
  • the atomizing nozzle atomizes the ink into the ink particles by means of high pressure atomization.
  • the atomizing nozzle atomizes the ink into the ink particles by ultrasonic atomization.
  • the atomizing nozzle further includes a jetting unit for ejecting gas, causing the gas to move the atomized ink particles to be deposited on the printing area of the substrate.
  • the printing apparatus further includes at least one flow meter for controlling the amount of the ink supplied to the print head supplied by the liquid storage tank.
  • V K * H * S
  • K is a partial complement coefficient
  • H is the thickness of the film formed by the ink in the printing area of the substrate
  • S is the area of the printing area of the substrate.
  • the printing apparatus further includes a range finder and a distance adjusting unit, the range finder is disposed on the print head for measuring a distance between the print head and the substrate; the distance adjusting unit And respectively connected to the range finder and the print head, for adjusting a distance between the print head and the substrate according to the distance measured by the range finder.
  • a distance between the print head and the substrate is 0.1 mm to 10 mm.
  • the printing apparatus further includes a first control unit configured to control the print head to move at a uniform speed in the first direction.
  • the first control unit is further configured to: after the print head finishes printing in the first direction, control the print head to move in a second direction by a first predetermined distance to move the print head To a print area where the ink particles are not deposited; wherein the second direction is perpendicular to the first direction.
  • the printing apparatus further includes a second control unit, configured to control the substrate on the stage to move in a third direction after the print head completes printing in the first direction. a distance moving the printhead relative to the substrate onto a print area where the ink particles are not deposited; wherein the third direction is perpendicular to the first direction.
  • Another technical solution of the present disclosure provides a printing method for printing ink particles on a printing area of a substrate, comprising:
  • controlling the print head to move a preset distance in a second direction to move the print head to a print area on which the ink particles are not deposited;
  • the second direction is perpendicular to the first direction.
  • the print head is controlled to return to the initial position printed in the first direction, and the print head is controlled from the initial position.
  • the second direction moves the preset distance.
  • the print head is controlled to move the preset distance in the second direction from the completion position of the printing in the first direction.
  • the preset distance is a print width.
  • the printing apparatus and the printing method of the embodiments of the present disclosure are capable of atomizing the ink by setting The print head atomizes the ink into ink particles.
  • the ink particles have a smaller volume and can be directly filled in various small grooves of the substrate, thereby reducing the requirement on the substrate topography and reducing the time required for leveling.
  • the flattening is performed at a smaller film thickness; and the printing apparatus has a simple structure and a low cost, and can reduce the cost of preparing the OLED.
  • FIG. 1 is a schematic structural diagram of a printing apparatus according to an embodiment of the present disclosure
  • FIG. 2 is a schematic view of a print head of a printing apparatus of the embodiment of the present invention printed on a substrate;
  • FIG. 3 is a schematic structural diagram of a print head of a printing apparatus according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of an arrangement of a plurality of atomizing nozzles of a printing apparatus according to an embodiment of the present disclosure
  • FIG. 5 is a schematic view of a print head ejecting ink of a printing apparatus according to an embodiment of the present disclosure.
  • FIG. 6 is a flow chart of a printing method of an embodiment of the present disclosure.
  • the embodiment of the present disclosure discloses a printing apparatus.
  • the printing device can be used to print a flat layer substrate encapsulating an OLED.
  • the printing apparatus includes a stage 100, a liquid storage tank 1, and a print head 2.
  • the stage 100 is used to place the substrate 3.
  • the liquid storage tank 1 is used to store and supply ink.
  • the print head 2 is for atomizing the ink supplied from the liquid storage tank 1 into ink particles, and printing the ink particles on the printing area 31 of the substrate 3.
  • the printing device atomizes the ink into ink particles by providing a print head 2 capable of atomizing the ink, the ink particles having a smaller volume, which can be directly filled in various small grooves of the substrate 3, and the substrate 3 is reduced.
  • the requirements of the topography, while reducing the time required for leveling, can be leveled at a smaller film thickness.
  • the ink particles have a diameter of from 0.5 to 10 ⁇ m.
  • the ink particles of this specific diameter can cover the surface of the substrate 3 better and faster.
  • the print head 2 At least one atomizing nozzle 21 and at least one high pressure gas outlet 22 are included. Among them, the atomizing nozzle 21 is used to atomize the ink into ink particles and eject the ink particles. When there are a plurality of atomizing nozzles 21, the plurality of atomizing nozzles 21 can be arranged in accordance with the shape and requirements of the printing area 31 of the substrate 3. As shown in FIG. 4, an arrangement of a plurality of atomizing nozzles 21 is shown. Increasing the number of atomizing nozzles 21 increases the printing speed.
  • the high pressure gas outlet 22 is provided at the periphery of the atomizing nozzle 21.
  • the high pressure gas outlet 22 is for uniformly emitting high pressure gas. As shown in FIG. 5, the high-pressure gas forms the wind wall 23 so that the ink particles fall only within the range defined by the atomizing nozzle 21 without being randomly diffused, thereby ensuring that the ink particles drip in the printing area 31 of the substrate 3. .
  • the print head 2 further includes a pressure control valve.
  • the pressure control valve is for controlling the pressure of the high pressure gas in accordance with the distance between the print head 2 and the substrate 3.
  • the pressure of the high pressure gas is controlled according to the distance between the print head 2 and the substrate 3, so that the jet velocity can be controlled. The larger the distance, the greater the jet velocity is required, so that the ink particles are not leaked.
  • the atomizing nozzle 21 can be atomized into ink particles by high pressure atomization.
  • high pressure atomization the kinetic energy of the ink particles themselves causes the ink particles to deposit on the substrate 3.
  • the atomizing nozzle 21 can also atomize the ink into ink particles by ultrasonic atomization.
  • the atomizing nozzle 21 further includes a jet unit. The jet unit is used to eject a gas to cause the gas to move the atomized ink particles to be deposited on the printing area 31 of the substrate 3.
  • the printing device further comprises at least one flow meter 4.
  • the flow meter 4 is used to control the amount of ink supplied to the print head 2 supplied from the reservoir 1.
  • the flow meter can be in communication with the reservoir 1 via a first conduit 6 and with the printhead 2 via a second conduit 7.
  • the amount of ink entering the printhead 2 can be controlled so that the thickness of the film formed by the deposition of the ink particles can be controlled.
  • the print head 2 has a plurality of atomizing nozzles 21, the number of the flow meters 4 may be one, and the amount of fixed ink used by each atomizing nozzle 21 may be controlled; the number of the flow meters 4 may also be matched with the atomizing nozzles.
  • the number of 21 is the same, and each flow meter 4 controls the amount of ink of each atomizing nozzle 21, so that the printing accuracy can be improved.
  • the printing apparatus further includes a range finder 5 and a distance adjusting unit (not shown in the drawings).
  • the range finder 5 is used to measure the distance between the print head 2 and the substrate 3.
  • the range finder 5 can be disposed on the print head 2 such that the distance between the range finder 5 and the substrate 3 is equal to the distance from the print head 2 to the substrate 3, thereby The distance between the print head 2 and the substrate 3 can be accurately measured.
  • the range finder 5 can be a laser range finder. By setting the range finder 5, after the distance between the print head 2 and the substrate 3 is measured, the distance between the print head 2 and the substrate 3 can be adjusted by the distance adjusting unit as needed to avoid the distance between the print head 2 and the substrate 3.
  • the distance adjusting unit provides a mechanism for moving the movement of the print head 2 and assisting movement.
  • the distance adjusting unit may be in the form of a motor, a belt, and a slide rail, and the belt is driven by the motor to drive the print head 2 to move the print head 2 on the slide rail.
  • the distance adjustment unit may also adopt other specific structural forms. More preferably, the distance between the print head 2 and the substrate 3 is from 0.1 mm to 10 mm. This specific distance ensures that the print head 2 does not rub against the surface of the substrate 3, nor does it cause ink particles to leak out and drip into the non-printing area of the substrate 3.
  • the printing device further comprises a first control unit.
  • the first control unit is for controlling the uniform movement of the print head 2 in the first direction.
  • the uniform control of the print head 2 in the first direction by the first control unit causes the ink particles of the printing area 31 of the substrate 3 to be deposited at the same time. Since the deposition rate of the ink particles is constant, it is ensured that the thickness of the film formed by the ink deposited on the printing region 31 of the substrate 3 is uniform.
  • the first control unit is further configured to control the print head 2 to move in the second direction by a first predetermined distance after the print head 2 completes printing in the first direction, so that the print head 2 moves to print without depositing ink particles.
  • the second direction is perpendicular to the first direction. It should be understood that, during a specific printing process, the print head 2 can be controlled to return to the initial position of printing in the first direction, and then moved in the second direction, and then the print head 2 is next in the first direction. The movement of the print head 2 can also be controlled directly from the position where the printing is completed in the first direction, in the second direction, and then the print head 2 is moved for the next time in the first direction. For example, as shown in FIG.
  • the substrate 3 has a rectangular shape. Therefore, the first direction may be the direction x in which the short side of the substrate 3 is located, and the second direction may be the direction y in which the long side of the substrate 3 is located.
  • the first preset distance is a print width.
  • the print width generally refers to the size of the printable range of the print head 2 at rest.
  • the distance that the print head 2 moves in the second direction can also be controlled according to the requirements of the actual print area 31. After the printing is completed in the first direction, by controlling the movement of the print head 2 in the second direction, the print head 2 can be moved to the unprinted printing area 31, and the above process is repeated to finally deposit ink particles on the substrate.
  • the width is too large, resulting in the omission of the print area 31, and also because the width of the movement is too small, causing repeated printing in a partial area, wasting ink.
  • the printing apparatus further includes a second control unit.
  • the second control unit is used when printing After the head 2 finishes printing in the first direction, the substrate 3 on the control stage is moved in the third direction by a second predetermined distance, so that the print head 2 is moved relative to the substrate 3 onto the printing area 31 where the ink particles are not deposited.
  • the third direction is perpendicular to the first direction. It should be understood that during the specific printing process, the substrate 3 can be controlled to return to the initial position of printing in the first direction, and then moved in the second direction, and then the substrate 3 is moved in the first direction for the next time.
  • the substrate 3 is rectangular, and therefore, the first direction may be the direction x in which the short side of the substrate 3 is located, and the third direction may be the direction y in which the long side of the substrate 3 is located.
  • the second preset distance is a print width.
  • the distance that the substrate 3 moves in the third direction can also be controlled according to the requirements of the actual printing area 31.
  • the first control unit directly controls the movement of the print head 2 in the second direction.
  • the second control unit controls the substrate 3 to move in the third direction, and the print head 2 can be indirectly moved to the unprinted.
  • the above process is repeated, and finally the ink particles can be deposited in all the printing areas 31 of the substrate 3; at the same time, the second predetermined distance is moved in the third direction to ensure the required printing precision, in particular.
  • a print width is moved up in the third direction, it is ensured that the print area 31 is not missed due to the excessive width of the motion, and the width of the motion is not too small, causing repeated printing in a part of the area, wasting ink.
  • the printing apparatus of the embodiment of the present disclosure can perform printing by the following process:
  • the liquid storage tank 1 supplies ink to the print head 2.
  • the flow meter 4 controls the amount of ink entering the print head 2 in the liquid storage tank 1 in accordance with the film thickness required for the printing area 31 of the substrate 3.
  • the range finder 5 measures the distance between the print head 2 and the substrate 3, and adjusts the distance to an appropriate size by the distance adjusting unit.
  • the atomizing nozzle 21 of the print head 2 atomizes the ink into ink particles and ejects the ink particles.
  • the high pressure gas outlet 22 of the print head 2 ejects a high pressure gas to form a wind wall, causing the ink particles to drip in the printing area 31.
  • the range finder 5 can detect the distance of the print head 2 from the substrate 3 in real time and adjust the distance in real time by the distance adjusting unit.
  • the print head 2 is first controlled to move at a uniform speed in the first direction for printing. After the print head 2 is printed in the first direction, the print head 2 is moved by a predetermined distance in a direction perpendicular to the first direction, and then the print head 2 is printed from the position after the movement and printed in the first direction. . Printing in this mode, the print head 2 can be moved in a zigzag trajectory until the entire print area 31 is completely printed. After the printing is completed, the ink particles are leveled and then cured to obtain a finished product.
  • Another embodiment of the present disclosure discloses a printing method for printing ink particles on a printing area of a substrate 3, referring to FIG. 6, which includes the following steps:
  • Step S10 controlling the print head 2 of the printing device to print in the first direction
  • Step S20 After the print head 2 finishes printing in the first direction, the print head 2 is controlled to move a preset distance in the second direction to move the print head 2 to the print area where the ink particles are not deposited;
  • the second direction is perpendicular to the first direction.
  • the first direction may be the direction x in which the short side of the substrate 3 is located, and the second direction may be the direction y in which the long side of the substrate 3 is located.
  • the preset distance may be one print width.
  • step S20 may include: after the print head 2 performs printing in the first direction, controlling the print head 2 to return to the initial position of printing in the first direction, and controlling the print head 2 from the initial position. Move the preset distance in the second direction.
  • the step S20 may include: after the print head 2 performs printing in the first direction, controlling the print head to move the preset distance in the second direction from the completed position of the first direction printing.
  • the printing apparatus and the printing method of the embodiments of the present disclosure atomize the ink into ink particles by providing a print head 2 that can atomize the ink, and the ink particles have a smaller volume and can be directly filled in each of the substrates 3 In the small groove, the requirement for the topography of the substrate is reduced, and the time required for the leveling is reduced, and the level can be leveled at a smaller film thickness; by providing the high-pressure gas outlet 22 on the print head 2, the wind wall 23 can be formed.
  • the control enters the printing head 2
  • the amount of the ink can be used to control the thickness of the film formed by the deposition of the ink particles; the distance between the print head 2 and the substrate 3 can be measured by setting the range finder 5, and the distance can be adjusted by the distance adjusting unit after the distance is measured as needed.
  • the distance between the head 2 and the substrate 3 can prevent the distance between the print head 2 and the substrate 3 from being too close, causing the print head 2 to rub against the surface of the substrate 3; and the ink particles are not leaked due to the distance being too far.
  • the movement of the print head 2 and/or the substrate 3 can be controlled, so that ink particles can be deposited in all the printing areas 31 of the substrate 3. , improve printing accuracy.

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  • Ink Jet (AREA)
  • Electroluminescent Light Sources (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

提供一种打印设备及打印方法。该打印设备包括：载台（100），用于放置基板（3）；储液罐（1），用于存储和供应油墨；打印头（2），用于将所述储液罐供应的所述油墨雾化为油墨颗粒，并将所述油墨颗粒打印在所述基板的打印区域上。此打印设备通过设置可将油墨雾化的打印头，将油墨雾化成油墨颗粒，该油墨颗粒具有更小的体积，可直接填充在基板的各种小凹槽中，减少对基板形貌的要求，同时减少流平所需要的时间，可在更小的膜厚下流平。

Description

打印设备及打印方法 技术领域
本公开涉及打印技术领域，特别是涉及一种打印设备及打印方法。
背景技术
近年来，随着市场需求不断提升，柔性OLED(有机发光二极管，Organic Light-Emitting Diode)显示成为了显示行业发展的重点方向。OLED封装技术的好坏决定了产品的使用寿命，而三叠层结构(CVD-Flatness-CVD)以其优异的性能成为当前柔性OLED封装的主要方式。三叠层中平坦层主要是通过喷墨打印，然后固化来实现。目前喷墨打印主要使用的是陶瓷压电式打印头，吸取(Draw)状态下吸收油墨(ink)，释放(Release)状态下喷出油墨，此动作通过脉冲电压控制。喷出的油墨滴落在基板上，每滴油墨扩展后连接在一处，整体流平后进行固化。目前此打印头喷出的油墨的体积较大，以每滴油墨10PL为例，根据球体积计算公式V＝(4/3)πR3，得到油墨的直径尺寸为27μm，大的尺寸会增加对油墨流平性能的依赖性，经常会产生空穴(void)等，限制了使用范围，此打印头价格昂贵。
公开内容
本公开实施例提供一种打印设备及打印方法，以解决现有技术的打印设备喷出的油墨的颗粒较大，导致流平性差的问题。
本公开的一技术方案提供一种打印设备，包括载台、储液罐及打印头。载台用于放置基板；储液罐用于存储和供应油墨；打印头用于将所述储液罐供应的所述油墨雾化为油墨颗粒，并将所述油墨颗粒打印在所述基板的打印区域上。
进一步，所述油墨颗粒的直径为0.5～10μm。
进一步，所述打印头包括至少一个雾化喷嘴和至少一个高压气体出口，所述高压气体出口设置在所述雾化喷嘴的外围。
进一步，所述打印头还包括压强控制阀，所述压强控制阀用于根据所述打印头和所述基板之间的距离，控制所述高压气体的压强。
进一步，所述雾化喷嘴采用高压雾化的方式将所述油墨雾化成所述油墨颗粒。
进一步，所述雾化喷嘴采用超声波雾化的方式将所述油墨雾化成所述油墨颗粒。
进一步，所述雾化喷嘴还包括喷气单元，用于喷出气体，使所述气体带动雾化后的所述油墨颗粒运动，沉积在所述基板的打印区域上。
进一步，所述打印设备还包括至少一个流量计，用于控制所述储液罐供应的进入所述打印头的所述油墨的用量。
进一步，所述油墨的用量V＝K*H*S，其中，K为偏补系数，H为油墨在所述基板的打印区域形成的薄膜的厚度，S为所述基板的打印区域的面积。
进一步，所述打印设备还包括测距仪和距离调整单元，所述测距仪设置在所述打印头上，用于测量所述打印头与所述基板之间的距离；所述距离调整单元分别与所述测距仪和所述打印头连接，用于根据所述测距仪测量的距离，调整所述打印头与所述基板之间的距离。
进一步，所述打印头与所述基板之间的距离为0.1mm～10mm。
进一步，所述打印设备还包括第一控制单元，用于控制所述打印头在第一方向上匀速运动。
进一步，所述第一控制单元还用于当所述打印头在所述第一方向上完成打印后，控制所述打印头在第二方向上运动第一预设距离，使所述打印头运动到未沉积所述油墨颗粒的打印区域上；其中，所述第二方向与所述第一方向垂直。
进一步，所述打印设备还包括第二控制单元，用于当所述打印头在所述第一方向上完成打印后，控制所述载台上的所述基板在第三方向上运动第二预设距离，使所述打印头相对于所述基板运动到未沉积所述油墨颗粒的打印区域上；其中，所述第三方向与所述第一方向垂直。
本公开的另一技术方案提供一种打印方法，用于将油墨颗粒打印在基板的打印区域上，其特征在于：包括：
控制打印设备的打印头沿第一方向进行打印；及
当所述打印头在所述第一方向上完成打印后，控制所述打印头在第二方向上运动预设距离，使所述打印头运动到未沉积所述油墨颗粒的打印区域上；
重复上述步骤，使得油墨颗粒沉积在基板的所述打印区域内。
进一步，所述第二方向与所述第一方向垂直。
进一步，在所述打印头沿所述第一方向进行打印后，控制所述打印头回到本次在所述第一方向上打印的初始位置，控制所述打印头自所述初始位置沿所述第二方向运动所述预设距离。
进一步，在所述打印头沿所述第一方向进行打印后，控制所述打印头自上述第一方向打印的完成位置开始沿所述第二方向运动所述预设距离。
进一步，所述预设距离为一个打印宽度。
这样，本公开实施例的打印设备及打印方法，通过设置可将油墨雾化的 打印头，将油墨雾化成油墨颗粒，该油墨颗粒具有更小的体积，可直接填充在基板的各种小凹槽中，减少对基板形貌的要求，同时减少流平所需要的时间，可在更小的膜厚下流平；并且该打印设备结构简单，成本较低，可降低制备OLED的成本。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对本公开实施例的描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本公开实施例的打印设备的结构示意图；
图2是本公开实施例的打印设备的打印头在基板上打印的示意图；
图3是本公开实施例的打印设备的打印头的结构示意图；
图4是本公开实施例的打印设备的多个雾化喷嘴的一种排列方式的示意图；
图5是本公开实施例的打印设备的打印头喷出油墨的示意图。
图6是本公开实施例的打印方法流程图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获取的所有其他实施例，都属于本公开保护的范围。
本公开实施例公开了一种打印设备。该打印设备可用于打印封装OLED的平坦层基板。如图1和2所示，该打印设备包括载台100、储液罐1和打印头2。其中，载台100用于放置基板3。储液罐1用于存储和供应油墨。打印头2用于将储液罐1供应的油墨雾化为油墨颗粒，并将油墨颗粒打印在基板3的打印区域31上。
该打印设备，通过设置可将油墨雾化的打印头2，将油墨雾化成油墨颗粒，该油墨颗粒具有更小的体积，可直接填充在基板3的各种小凹槽中，减少对基板3的形貌的要求，同时减少流平所需要的时间，可在更小的膜厚下流平。
优选的，油墨颗粒的直径为0.5～10μm。该特定直径的油墨颗粒，可以更好、更快的覆盖在基板3的表面。
具体的，为实现油墨雾化为油墨颗粒的功能，如图3所示，该打印头2 包括至少一个雾化喷嘴21和至少一个高压气体出口22。其中，雾化喷嘴21用于将油墨雾化为油墨颗粒并喷出油墨颗粒。当该雾化喷嘴21有多个时，多个雾化喷嘴21可根据基板3的打印区域31的形状和要求等进行排列。如图4所示，示出多个雾化喷嘴21的一种排列方式。增加雾化喷嘴21的数量，可增加打印速度。高压气体出口22设置在雾化喷嘴21的外围。该高压气体出口22用于均匀射出高压气体。如图5所示，该高压气体形成风墙23，使油墨颗粒只滴落在雾化喷嘴21限定的范围内，而不会随意扩散，从而保证油墨颗粒滴落在基板3的打印区域31内。
为了进一步控制油墨颗粒沉积在基板3的打印区域31内，优选的，打印头2还包括压强控制阀。该压强控制阀用于根据打印头2和基板3之间的距离，控制高压气体的压强。通过设置压强控制阀，根据打印头2和基板3之间的距离大小，控制高压气体的压强，从而可控制喷气速度。该距离越大，则要求喷气速度越大，从而可保证油墨颗粒不外漏。
在一优选的实施例中，雾化喷嘴21可采用高压雾化的方式将油墨雾化成油墨颗粒。当使用高压雾化时，油墨颗粒自身的动能就可使油墨颗粒沉积在基板3上。
在另一优选的实施例中，雾化喷嘴21也可采用超声波雾化的方式将油墨雾化成油墨颗粒。当使用超声波雾化时，油墨颗粒自身动能很小，需使用气体流动带动油墨颗粒滴落在基板3上，因此，这种雾化喷嘴21还包括喷气单元。该喷气单元用于喷出气体，使气体带动雾化后的油墨颗粒运动，沉积在基板3的打印区域31上。
优选的，该打印设备还包括至少一个流量计4。该流量计4用于控制储液罐1供应的进入打印头2的油墨的用量。该流量计可通过第一导管6与储液罐1连通，通过第二导管7与打印头2连通。通过设置流量计4，可控制进入打印头2的油墨的用量，从而可控制油墨颗粒沉积形成薄膜的厚度。当该打印头2有多个雾化喷嘴21时，该流量计4的数量可以为一个，可控制各雾化喷嘴21使用固定的油墨的用量；该流量计4的数量还可以与雾化喷嘴21的数量相同，每一流量计4控制每一雾化喷嘴21的油墨的用量，从而可提高打印精度。具体的，油墨的用量可通过下式获得：V＝K*H*S，其中，V为油墨的用量，K为偏补系数，H为油墨在基板3的打印区域31形成的薄膜的厚度，S为基板3的打印区域31的面积。因此，当需要打印时，先确定所需的打印区域31的面积S和薄膜的厚度H后，可计算出所需油墨的总量。
优选的，该打印设备还包括测距仪5和距离调整单元(附图未示出)。测距仪5用于测量打印头2与基板3之间的距离。该测距仪5可设置在打印头2上，使测距仪5到基板3的距离与打印头2到基板3的距离相等，从而 可准确测量打印头2与基板3之间的距离。例如，该测距仪5可以是激光测距仪。通过设置测距仪5，以便在测得打印头2与基板3的距离后，可根据需要通过距离调整单元调整打印头2与基板3之间的距离，避免打印头2与基板3的距离过近，导致打印头2与基板3的表面摩擦；又不会因为距离过远而造成油墨颗粒外漏，滴落在基板3的非打印区域。该距离调整单元提供打印头2移动的动力及辅助移动的机构。例如，该距离调整单元可以采用电机、皮带和滑轨的形式，通过电机驱动皮带，从而带动打印头2使打印头2在滑轨上移动。应当理解的是，该距离调整单元还可以采用其他具体的结构形式。更优选的，打印头2与基板3之间的距离为0.1mm～10mm。该特定的距离可确保打印头2不会与基板3的表面摩擦，也不会使油墨颗粒外漏，滴落在基板3的非打印区域。
优选的，该打印设备还包括第一控制单元。该第一控制单元用于控制打印头2在第一方向上匀速运动。通过第一控制单元控制打印头2在第一方向上匀速运动，使基板3的打印区域31的油墨颗粒沉积的时间相同。由于油墨颗粒的沉积速率是不变的，可确保基板3的打印区域31沉积的油墨形成的薄膜的厚度是均匀的。
此外，第一控制单元还用于当打印头2在第一方向上完成打印后，控制打印头2在第二方向上运动第一预设距离，使打印头2运动到未沉积油墨颗粒的打印区域31上。其中，第二方向与第一方向垂直。应当理解的，具体打印过程中，可控制打印头2回到本次在第一方向上打印的初始位置后，再在第二方向上运动，然后使打印头2进行下一次在第一方向上的运动；也可以控制打印头2直接从本次在第一方向上打印完成的位置开始，在第二方向上运动，然后使打印头2进行下一次在第一方向上的运动。例如，如图2所示，基板3为长方形，因此，第一方向可以是基板3的短边所在的方向x，第二方向可以是基板3的长边所在的方向y。优选的，该第一预设距离为一个打印宽度。打印宽度一般指的是打印头2静止状态下可打印范围的尺寸。当然也可以根据实际打印区域31的需求，控制打印头2在第二方向上运动的距离。当在第一方向上完成打印后，通过控制打印头2在第二方向上运动，可将打印头2运动到未打印的打印区域31上，重复上述的过程，最终可使油墨颗粒沉积在基板3的所有打印区域31内；同时，在第二方向上运动第一预设距离，可确保所需的打印精度，特别的，当在第二方向上运动一个打印宽度，可确保不会由于运动的宽度过大，导致遗漏打印区域31，也不会由于运动的宽度过小，造成在部分区域重复打印，浪费油墨。
除了通过第一控制单元控制打印头2在第二方向上运动外，在另一优选的实施例中，该打印设备还包括第二控制单元。该第二控制单元用于当打印 头2在第一方向上完成打印后，控制载台上的基板3在第三方向上运动第二预设距离，使打印头2相对于基板3运动到未沉积油墨颗粒的打印区域31上。其中，第三方向与第一方向垂直。应当理解的，具体打印过程中，可控制基板3回到本次在第一方向上打印的初始位置后，再在第二方向上运动，然后使基板3进行下一次在第一方向上的运动；也可以控制基板3直接从本次在第一方向上打印完成的位置开始，在第二方向上运动，然后使基板3进行下一次在第一方向上的运动。例如，如图2所示，基板3为长方形，因此，第一方向可以是基板3的短边所在的方向x，第三方向可以是基板3的长边所在的方向y。优选的，该第二预设距离为一个打印宽度。当然也可以根据实际打印区域31的需求，控制基板3在第三方向上运动的距离。与第一控制单元直接控制打印头2在第二方向上运动不同，该另一优选的实施例中通过第二控制单元控制基板3在第三方向上运动，可间接使打印头2运动到未打印的打印区域31上，重复上述的过程，最终可使油墨颗粒沉积在基板3的所有打印区域31内；同时，在第三方向上运动第二预设距离，可确保所需的打印精度，特别的，当在第三方向上运动一个打印宽度，可确保不会由于运动的宽度过大，导致遗漏打印区域31，也不会由于运动的宽度过小，造成在部分区域重复打印，浪费油墨。
具体的，本公开实施例的打印设备可以通过如下的过程进行打印：
储液罐1向打印头2供应油墨。在这个过程中，流量计4根据基板3的打印区域31所需的膜厚控制储液罐1中的油墨进入打印头2的用量。测距仪5测量打印头2与基板3的距离，并通过距离调整单元将该距离调整为合适的大小。打印头2的雾化喷嘴21将油墨雾化为油墨颗粒，并喷出油墨颗粒。同时，打印头2的高压气体出口22喷出高压气体，形成风墙，使油墨颗粒滴落在打印区域31内。在这个过程中，测距仪5可实时检测打印头2与基板3的距离并通过距离调整单元实时调整该距离。打印的时候，先控制打印头2在第一方向上匀速运动进行打印。当该打印头2在第一方向打印完成后，再使打印头2在与第一方向垂直的方向上运动预设距离，然后使打印头2从运动后的位置开始，在第一方向上打印。以此模式进行打印，打印头2可呈Z字形轨迹运动，直到将整个打印区域31全部打印完成。打印完成后使油墨颗粒流平，然后进行固化，得到成品。
本公开另一实施例公开了一种打印方法，用于将油墨颗粒打印在基板3的打印区域上，参考图6，其包括以下步骤：
步骤S10：控制打印设备的打印头2沿第一方向进行打印；
步骤S20：当打印头2在第一方向上完成打印后，控制打印头2在第二方向上运动预设距离，使打印头2运动到未沉积油墨颗粒的打印区域上；及
重复上述步骤，使得油墨颗粒沉积在基板3的打印区域内。
其中，第二方向与第一方向垂直。第一方向可以是基板3的短边所在的方向x，第二方向可以是基板3的长边所在的方向y。优选的，预设距离可为一个打印宽度。
其中，在一实施例中，步骤S20可包括：在打印头2沿第一方向进行打印后，控制打印头2回到本次在第一方向上打印的初始位置，控制打印头2自初始位置沿第二方向运动预设距离。
其中，在另一实施例中，步骤S20可包括：在打印头2沿第一方向进行打印后，控制打印头自第一方向打印的完成位置开始沿第二方向运动预设距离。
综上，本公开实施例的打印设备及打印方法，通过设置可将油墨雾化的打印头2，将油墨雾化成油墨颗粒，该油墨颗粒具有更小的体积，可直接填充在基板3的各种小凹槽中，减少对基板形貌的要求，同时减少流平所需要的时间，可在更小的膜厚下流平；通过在打印头2上设置高压气体出口22，可形成风墙23，使油墨颗粒只滴落在雾化喷嘴21限定的范围内，而不会随意扩散，从而保证油墨颗粒滴落在基板3的打印区域31内；通过设置流量计4，可控制进入打印头2的油墨的用量，从而可控制油墨颗粒沉积形成薄膜的厚度；通过设置测距仪5可测量打印头2与基板3的距离，并可根据需要在测得该距离后，通过距离调整单元调整打印头2与基板3之间的距离，可避免打印头2与基板3的距离过近，导致打印头2与基板3表面摩擦；又不会因为距离过远而造成油墨颗粒外漏，滴落在基板3的非打印区域；此外，通过设置第一控制单元和第二控制单元，可控制打印头2和/或基板3运动，从而可使油墨颗粒沉积在基板3的所有打印区域31内，提高打印精度。
本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。
尽管已描述了本公开实施例的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例做出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本公开实施例范围的所有变更和修改。
最后，还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者终端设备不仅包括那些要素， 而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者终端设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者终端设备中还存在另外的相同要素。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以权利要求的保护范围为准。

Claims (19)

  1. 一种打印设备，其特征在于，包括：
    载台，用于放置基板；
    储液罐，用于存储和供应油墨；及
    打印头，用于将所述储液罐供应的所述油墨雾化为油墨颗粒，并将所述油墨颗粒打印在所述基板的打印区域上。
  2. 根据权利要求1所述的打印设备，其特征在于：所述油墨颗粒的直径为0.5～10μm。
  3. 根据权利要求1-2任一项所述的打印设备，其特征在于：所述打印头包括至少一个雾化喷嘴和至少一个高压气体出口，所述高压气体出口设置在所述雾化喷嘴的外围。
  4. 根据权利要求3所述的打印设备，其特征在于，所述打印头还包括压强控制阀，所述压强控制阀用于根据所述打印头和所述基板之间的距离，控制所述高压气体的压强。
  5. 根据权利要求3所述的打印设备，其特征在于：所述雾化喷嘴采用高压雾化的方式将所述油墨雾化成所述油墨颗粒。
  6. 根据权利要求3所述的打印设备，其特征在于：所述雾化喷嘴采用超声波雾化的方式将所述油墨雾化成所述油墨颗粒。
  7. 根据权利要求3-6任一项所述的打印设备，其特征在于，所述雾化喷嘴还包括喷气单元，用于喷出气体，使所述气体带动雾化后的所述油墨颗粒运动，沉积在所述基板的打印区域上。
  8. 根据权利要求1-7任一项所述的打印设备，其特征在于，所述打印设备还包括至少一个流量计，用于控制所述储液罐供应的进入所述打印头的所述油墨的用量。
  9. 根据权利要求8所述的打印设备，其特征在于：所述油墨的用量V＝K*H*S，其中，K为偏补系数，H为油墨在所述基板的打印区域形成的薄膜的厚度，S为所述基板的打印区域的面积。
  10. 根据权利要求1-9任一项所述的打印设备，其特征在于，所述打印设备还包括测距仪和距离调整单元，所述测距仪设置在所述打印头上，用于测量所述打印头与所述基板之间的距离；所述距离调整单元分别与所述测距仪和所述打印头连接，用于根据所述测距仪测量的距离，调整所述打印头与所述基板之间的距离。
  11. 根据权利要求1-10任一项所述的打印设备，其特征在于：所述打印头与所述基板之间的距离为0.1mm～10mm。
  12. 根据权利要求1-11任一项所述的打印设备，其特征在于，所述打印 设备还包括第一控制单元，用于控制所述打印头在第一方向上匀速运动。
  13. 根据权利要求12所述的打印设备，其特征在于：所述第一控制单元还用于当所述打印头在所述第一方向上完成打印后，控制所述打印头在第二方向上运动第一预设距离，使所述打印头运动到未沉积所述油墨颗粒的打印区域上；其中，所述第二方向与所述第一方向垂直。
  14. 根据权利要求1-12任一项所述的打印设备，其特征在于，所述打印设备还包括第二控制单元，用于当所述打印头在所述第一方向上完成打印后，控制所述载台上的所述基板在第三方向上运动第二预设距离，使所述打印头相对于所述基板运动到未沉积所述油墨颗粒的打印区域上；其中，所述第三方向与所述第一方向垂直。
  15. 一种打印方法，用于将油墨颗粒打印在基板的打印区域上，其特征在于：包括：
    控制打印设备的打印头沿第一方向进行打印；
    当所述打印头在所述第一方向上完成打印后，控制所述打印头在第二方向上运动预设距离，使所述打印头运动到未沉积所述油墨颗粒的打印区域上；及
    重复上述步骤，使得油墨颗粒沉积在基板的所述打印区域内。
  16. 根据权利要求15所述的打印方法，其特征在于，所述第二方向与所述第一方向垂直。
  17. 根据权利要求16所述的打印方法，其特征在于，在所述打印头沿所述第一方向进行打印后，控制所述打印头回到本次在所述第一方向上打印的初始位置，控制所述打印头自所述初始位置沿所述第二方向运动所述预设距离。
  18. 根据权利要求16所述的打印方法，其特征在于，在所述打印头沿所述第一方向进行打印后，控制所述打印头自所述第一方向打印的完成位置开始沿所述第二方向运动所述预设距离。
  19. 根据权利要求15-18任一项所述的打印方法，其特征在于，所述预设距离为一个打印宽度。
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