WO2020155382A1 - 喷墨误差获取及喷墨矫正方法、装置及喷墨印刷装置 - Google Patents

喷墨误差获取及喷墨矫正方法、装置及喷墨印刷装置 Download PDF

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WO2020155382A1
WO2020155382A1 PCT/CN2019/081810 CN2019081810W WO2020155382A1 WO 2020155382 A1 WO2020155382 A1 WO 2020155382A1 CN 2019081810 W CN2019081810 W CN 2019081810W WO 2020155382 A1 WO2020155382 A1 WO 2020155382A1
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Prior art keywords
printed
height
inkjet
predetermined position
error
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PCT/CN2019/081810
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English (en)
French (fr)
Inventor
刘小生
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南京协辰电子科技有限公司
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Publication of WO2020155382A1 publication Critical patent/WO2020155382A1/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
    • 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

Definitions

  • the present invention relates to the field of inkjet technology, in particular to an inkjet error acquisition and inkjet correction method and device, and an inkjet device.
  • Inkjet technology is not only used in traditional printers, but also widely used in PCB (English: Printed Circuit Board, Chinese: Printed Circuit Board), and is also expected to be applied to organic light-emitting electronic version (English: Organic Electro-Luminescence, abbreviated as : OEL, organic EL), liquid crystal panels and other electronic devices in the manufacturing process.
  • the offset of the ink jetting position during printing is closely related to the quality of the printed product.
  • the offset of the landing position is affected by many factors, such as: the position offset of the printing object, the ejection position of the nozzle, the ejection angle of the ink droplet of the nozzle, and the deviation of the horizontal velocity when the ink is ejected from the nozzle.
  • the embodiments of the present invention provide an inkjet error acquisition and inkjet correction method, device, and an inkjet printing device to solve the problem that the existing inkjet method compensates or corrects errors caused by known influence factors. Later, there is still a large deviation between the position of the ink sprayed on the printed matter and the predetermined position, which leads to the problem of poor quality of the printed matter.
  • an embodiment of the present invention provides an inkjet error obtaining method, which includes: obtaining the lifted height of a predetermined position on the object to be printed; obtaining the inkjet position of the predetermined position according to the lifted height of the predetermined position error.
  • the step of obtaining the inkjet position error of the predetermined position according to the tilted height of the predetermined position includes: obtaining the inkjet position when the thickness of the object to be printed increases by a unit distance The first error; the inkjet position error of the predetermined position is obtained according to the first error and the tilt height of the predetermined position.
  • the object to be printed is a plate; the step of obtaining the lifted height of a predetermined position on the object to be printed includes: obtaining the average lifted height of the object to be printed; The lift height is determined as the lift height of the predetermined position on the object to be printed.
  • the step of obtaining the average lift height of the object to be printed includes: obtaining the highest lift height of the object to be printed; Let the product of the parameters be determined as the average lift height.
  • the inkjet error obtaining method obtaineds the lifted height of a predetermined position on the object to be printed, and obtains the inkjet position error of the predetermined position according to the lifted height of the predetermined position, that is, by providing a method to influence inkjet printing Influencing factors of the printing accuracy of the device (the lifting height of the object to be printed), and provides a printing error calculation method based on the influencing factor, which solves the problem of warping of the object to be printed without considering the warpage of the object to be printed in the prior art.
  • the ink ejected by the inkjet printing device After compensating and correcting the error caused by the known influencing factors, the ink ejected by the inkjet printing device still has a large deviation between the position on the printed matter and the predetermined position, which leads to the problem of poor quality of the printed matter.
  • the value range of the preset parameter is 0.2 to 0.4.
  • an embodiment of the present invention provides an inkjet correction method, including: obtaining the lifted height of a predetermined position on the object to be printed; obtaining the theoretical vertical deviation between the ink ejection position of the nozzle and the predetermined position on the object to be printed;
  • the vertical deviation refers to the deviation in the vertical direction; the difference between the theoretical vertical deviation of the predetermined position and the tilt height of the predetermined position is taken as the actual vertical deviation of the predetermined position; the theoretical vertical deviation of the predetermined position is replaced with The actual vertical deviation of the predetermined position, correct the inkjet control method.
  • the object to be printed is a plate; the step of obtaining the lifted height of the predetermined position on the object to be printed includes: obtaining the average lifted height of the object to be printed; The lift height is determined as the lift height of the predetermined position on the object to be printed.
  • the step of obtaining the average lift height of the object to be printed includes: obtaining the highest lift height of the object to be printed; Let the product of the parameters be determined as the average lift height.
  • the value range of the preset parameter is 0.2-0.4.
  • an embodiment of the present invention provides an inkjet error acquisition device, including: a tilt height acquisition module for acquiring the tilt height of a predetermined position on an object to be printed; and an inkjet position error calculation module for The inkjet position error of the predetermined position is obtained according to the tilt height of the predetermined position.
  • the inkjet position error calculation module includes: a first error calculation unit for obtaining the first error of the inkjet position when the thickness of the object to be printed increases by a unit distance ; Inkjet position error calculation unit for obtaining the inkjet position error of the predetermined position according to the first error and the tilt height of the predetermined position.
  • the tilt height acquisition module includes: an average tilt acquisition unit for acquiring the average tilt height of the object to be printed; and a tilt height acquisition unit, It is used to determine the average lift height as the lift height at the predetermined position of the object to be printed.
  • the average tilt acquisition unit includes: an acquisition subunit for acquiring the highest tilting height of the object to be printed; a height determination subunit for The product of the highest tilting height and the preset parameters is determined as the average tilting height.
  • an embodiment of the present invention provides an inkjet correction device, including: a tilt height acquisition module for acquiring the tilt height of a predetermined position on an object to be printed; and a theoretical deviation acquisition module for acquiring nozzle output
  • the theoretical vertical deviation between the ink position and the predetermined position on the object to be printed refers to the deviation in the vertical direction;
  • the actual deviation calculation module is used to compare the theoretical vertical deviation of the predetermined position with the lift height of the predetermined position The difference value of is used as the actual vertical deviation of the predetermined position;
  • the inkjet correction module is used to replace the theoretical vertical deviation of the predetermined position with the actual vertical deviation of the predetermined position to correct the inkjet control method.
  • the tilt height acquisition module includes: an average tilt acquisition unit for acquiring the average tilt height of the object to be printed; and a tilt height acquisition unit for calculating the average tilt height
  • the lifted height is determined as the lifted height at the predetermined position of the object to be printed.
  • the average tilt acquisition unit includes: an acquisition subunit for acquiring the highest tilt height of the object to be printed; a height determination subunit for The product of the highest tilting height and the preset parameters is determined as the average tilting height.
  • an embodiment of the present invention provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions, and the computer instructions are used to make a computer execute the first aspect, any one of the implementation manners of the first aspect, The method described in the second aspect or any one of the implementation manners of the second aspect.
  • an embodiment of the present invention provides an inkjet printing device, including: a nozzle for ejecting ink to a predetermined position on the object to be printed; an inkjet control device for controlling the nozzle to spray ink on the object to be printed Inkjet at a predetermined position; a tilt height acquisition device, a memory and a processor, the tilt height acquisition module is used to acquire the tilt height of a predetermined position on the object to be printed, the memory stores computer instructions, and the processor executes the computer instructions, thereby Perform the method described in the first aspect, any implementation manner of the first aspect, the second aspect, or any implementation manner of the second aspect.
  • the inkjet printing device further includes a distance measuring device for measuring the first deviation of the inkjet position from when the thickness of the object to be printed increases by a unit distance.
  • the tilt height obtaining device includes: a detection signal transmitting module, which is arranged on one side of the printing area of the object to be printed, and is used to transmit a detection signal;
  • the receiving device is arranged on the other side of the printing area of the object to be printed, and is used to receive the detection signal emitted by the detection signal transmitter module.
  • the inkjet printing device further includes: a clamp, which is provided at the periphery of the printing area of the object to be printed, and is used to fix the object to be printed to prevent one side of it from lifting.
  • Figure 1A is a schematic diagram of the movement trajectory of ink droplets after leaving the nozzle
  • FIG. 1B is a schematic diagram of an application scenario of an embodiment of the present invention.
  • FIG. 2 is a method flowchart of an inkjet error acquisition method according to an embodiment of the present invention
  • FIG. 3 is a method flowchart of an inkjet error obtaining method according to another embodiment of the present invention.
  • Fig. 5 is a schematic block diagram of an inkjet error obtaining device according to an embodiment of the present invention.
  • Fig. 6 is a schematic block diagram of an inkjet correction device according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the hardware structure of an inkjet printing device according to an embodiment of the present invention.
  • the inkjet control device controls the nozzle to move in the horizontal direction, and after the nozzle enters the printing area, controls the nozzle to eject ink droplets onto the object to be printed. Since the nozzle has been moving in the horizontal direction, under the action of inertia, the ink droplet maintains the same horizontal speed as the nozzle after leaving the nozzle. Therefore, the ink droplet does not fall vertically in a straight line during the inkjet process, but as shown in Figure 1A. As shown in the parabolic drop, the position where the ink drop starts to fall and the position where the ink drop falls on the object to be printed will have an offset S.
  • the value of the offset S needs to be determined to determine the position (or time) where the ink droplet is ejected by the nozzle.
  • the offset calculation formula is:
  • V refers to the horizontal velocity of the ink drop
  • T refers to the falling time of the ink drop
  • H refers to the distance between the nozzle and the object to be printed
  • V 0 refers to the initial vertical falling velocity of the ink drop
  • the nozzle The initial vertical falling velocity V 0 of the ejected ink drop is almost constant.
  • the ink drop falling time T is mainly determined by the distance H between the printing object and the nozzle. Therefore, the main influencing factor of the offset S is the ink drop The speed V in the horizontal direction and the distance H between the object to be printed and the nozzle.
  • the landing position has different offsets relative to the theoretical landing position. Therefore, if the warped printing object is printed directly according to the position (or time) at which the ink droplets are ejected from the nozzles determined above, the printing accuracy will be reduced, resulting in poor printing quality. Based on this, the inventor proposes an inkjet error acquisition method and an inkjet correction method provided by embodiments of the present invention, and the method will be described in detail below.
  • FIG. 1B shows a schematic diagram of an application scenario of an embodiment of the present invention, which shows an inkjet printing device, including: the object to be printed 1, the workbench 3, the clamp 2, the tilt height acquisition device, the nozzle (not shown in the figure) ) And nozzle control device (not shown in the figure).
  • the object 1 to be printed is fixedly arranged on the worktable 3 by a plurality of clamps 2, and at least two sides of the object to be printed 1 are provided with a plurality of clamps 2, specifically, when the two sides of the object to be printed 1 When clamped by the clamp 2, the two side edges are the opposite sides of the object 1 to be printed.
  • the clamp 2 fixes the object 1 to be printed to prevent one side of it from lifting. It should be noted that although the side of the object 1 to be printed will not be lifted when fixed by the clamp 2, the middle position of the object 1 to be printed There may still be warping (usually convex in the middle).
  • the device for obtaining the tilting height includes a detection signal transmitting module 41 arranged on one side of the printing area of the object to be printed 1 and used for transmitting detection signals, and arranged on the other side of the printing area of the object to be printed 1 for receiving and detecting
  • the detection signal receiving module 42 of the detection signal transmitted by the signal transmitting module 41 The line scan starting position of the tilt height acquisition device is the upper surface of the workbench 3 (the object to be printed 1 is set on the upper surface of the workbench 3), and the tilt height acquisition device starts from the line scan start position on the object to be printed 1 Scan until the detection signal receiving module 42 starts to receive the detection signal emitted by the detection signal transmitting module 41, and obtain the height measurement result of the object 1 to be printed.
  • the nozzle of the inkjet printing device is arranged above the object 1 to be printed, and the nozzle on the nozzle faces the object 1 to be printed.
  • the nozzle can be driven by the nozzle control device to face the first direction (as shown by the dotted arrow in Figure 1B. Direction) or in the second direction (the Y direction shown by the dashed arrow in FIG. 1B), so that different positions of the object 1 to be printed are ejected.
  • FIG. 2 shows a flowchart of an inkjet error acquisition method according to an embodiment of the present invention.
  • the method can be used in, but not limited to, the inkjet printing device shown in FIG. 1B for detecting the inkjet error of the nozzle.
  • the method includes the following steps:
  • Step S101 Obtain the lifted height of a predetermined position on the object to be printed.
  • the predetermined position on the object to be printed can be calculated based on the height measurement result fed back from the tilt height acquisition device shown in FIG. 1B.
  • the tilting height can be not limited to the inkjet printing device shown in FIG. 1B.
  • it can also be set above a predetermined position on the object to be printed and positioned on the same horizontal plane as the nozzle of the inkjet printing device.
  • Height measuring devices such as distance meters and acoustic distance meters measure the actual distance from the nozzle to the predetermined position, and then calculate the difference with the reference distance from the nozzle to the object to be printed without tilting to obtain the tilt of the predetermined position on the object to be printed height.
  • Step S102 Obtain the ink jet position error of the predetermined position according to the tilted height of the predetermined position.
  • the inkjet error obtaining method obtains the lifted height of a predetermined position on the object to be printed, and obtains the inkjet position error of the predetermined position according to the lifted height of the predetermined position, that is, by providing an influencing inkjet Influencing factors of the printing accuracy of the printing device (the lifting height of the object to be printed), and provides a printing error calculation method based on the influencing factor, which solves the problem of warping of the object to be printed in the prior art.
  • the ink ejected by the inkjet printing device still has a large deviation between the position on the printed matter and the predetermined position, resulting in the problem of poor quality of the printed matter.
  • FIG. 3 shows a flowchart of another inkjet error acquisition method according to an embodiment of the present invention.
  • the application scenario shown in FIG. 1B is used to describe the inkjet error acquisition in the embodiment of the present invention.
  • method includes the following steps:
  • Step S201 Obtain the highest tilting height of the object to be printed.
  • the tilt height acquisition device is driven by the driving device to scan the object to be printed from the line scan start position until The detection signal receiving module starts to receive the detection signal emitted by the detection signal transmitter module and obtains a height measurement result. Therefore, the height measurement result is the height of the object to be printed away from the highest tilt of the worktable to the upper surface of the worktable. Calculate the maximum lift height of the object to be printed by the following formula:
  • ⁇ H refers to the highest tilting height of the object to be printed
  • H measurement refers to the height measurement result of the tilting height obtaining device
  • H plate refers to the thickness of the object to be printed.
  • Step S202 Determine the product of the highest tilting height and the preset parameter as the average tilting height.
  • the value of the preset parameter is based on the ratio of the area of the object to be printed with the area of the object to be printed relative to the overall area of the object to be printed, and the actual application scenarios such as the pattern to be printed on the object to be printed. Determine, that is, calculate the average lift height of the object to be printed by the following formula:
  • ⁇ H′ refers to the average lift height of the object to be printed
  • ⁇ H refers to the highest lift height of the object to be printed
  • k 1 refers to a preset parameter.
  • the preset parameter k 1 can be set to any desired value from 0.2 to 0.4, such as 0.2, 0.25, 0.36, 0.4, and so on.
  • Step S203 Determine the average lift height as the lift height of a predetermined position on the object to be printed.
  • Step S204 Obtain the ink jet position error of the predetermined position according to the tilted height of the predetermined position.
  • the ink drop offset S 1 when the thickness of the object to be printed is the "reference thickness”, and then obtain the thickness of the object to be printed as the "reference thickness + the average lift height of the object to be printed ⁇ H' ”
  • the objects to be printed that are "reference thickness + average lift height of the objects to be printed” are all objects to be printed that are not deformed and warped.
  • the first error k 2 of the inkjet position when the thickness of the object to be printed increases by one unit distance (when the initial vertical falling speed V 0 of the ink drop ejected by the nozzle remains constant, the nozzle of the inkjet printing device When the horizontal speed of the ink droplet is V k , the deviation of the inkjet position when the thickness of the object to be printed increases by one unit distance), and then calculate the first error k 2 and the average lift of the object to be printed.
  • the method of multiplying the height ⁇ H' to calculate the inkjet position error of a predetermined position on the object to be printed, specifically, the inkjet position error is calculated by the following formula:
  • ⁇ S refers to the inkjet position error
  • ⁇ H' refers to the lifting height of a predetermined position on the object to be printed
  • k 2 refers to the first error when the horizontal velocity of the ink droplet is V k
  • V refers to the ink drop
  • ⁇ H refers to the highest lifting height of the object to be printed
  • k 1 refers to a preset parameter.
  • the inkjet error acquisition method obtains the lifted height of a predetermined position on the object to be printed, and obtains the inkjet position error of the predetermined position according to the lifted height of the predetermined position, that is, by providing a method to influence inkjet printing Influencing factors of the printing accuracy of the device (the lifting height of the object to be printed), and provides a printing error calculation method based on the influencing factor, which solves the problem of warping of the object to be printed without considering the warpage of the object to be printed in the prior art.
  • the ink ejected by the inkjet printing device After compensating and correcting the error caused by the known influencing factors, the ink ejected by the inkjet printing device still has a large deviation between the position on the printed matter and the predetermined position, which leads to the problem of poor quality of the printed matter.
  • FIG. 4 shows a flowchart of an inkjet correction method according to an embodiment of the present invention.
  • the method can be used in, but not limited to, the inkjet printing device described in FIG. 1B to assist in correcting the inkjet position error of the nozzle.
  • the method includes the following steps:
  • S301 Obtain the lifted height of a predetermined position on the object to be printed.
  • the specific calculation method of the tilted height of the predetermined position can be understood with reference to Embodiment 1, and will not be repeated here.
  • S302 Obtain a theoretical vertical deviation between the ink ejection position of the nozzle and a predetermined position on the object to be printed.
  • the vertical deviation refers to the deviation in the vertical direction
  • the theoretical vertical deviation refers to the distance between the object to be printed and the nozzle in the vertical direction when the object to be printed is theoretically free of deformation and warpage.
  • S303 Use the difference between the theoretical vertical deviation of the predetermined position and the tilted height of the predetermined position as the actual vertical deviation of the predetermined position.
  • the actual vertical deviation refers to the vertical distance from the ink ejection position of the nozzle to the predetermined position on the object to be printed when the object to be printed is actually warped.
  • the actual lateral offset of the ink droplets after they are ejected from the nozzle until they fall onto the object to be printed is calculated, so as to determine the actual ejection position of the ink droplets, and complete the control method of the inkjet Correction, specifically, calculate the actual lateral offset by the following formula:
  • S' refers to the actual horizontal offset
  • V refers to the actual horizontal velocity when the ink droplet falls
  • t refers to the time from the ink droplet ejected from the nozzle until it falls on the object to be printed
  • H' refers to the actual vertical Straight deviation
  • V 0 refers to the initial vertical falling speed of the ink drop
  • H refers to the theoretical vertical deviation
  • ⁇ H' refers to the lifting height of a predetermined position on the object to be printed.
  • the inkjet correction method provided by this embodiment obtains the lifted height of the predetermined position on the object to be printed and the theoretical vertical deviation between the nozzle ink position and the predetermined position on the object to be printed, and uses the difference between the above two data as Actual vertical deviation, and then correct the inkjet control method according to the actual vertical deviation, that is, by providing an influencing factor (the height of the object to be printed) that affects the printing accuracy of the inkjet printing device, and providing the
  • the factor-based inkjet correction method solves the problem of warping of the object to be printed in the prior art. After the error caused by other known influencing factors is compensated and corrected, the ink sprayed by the inkjet printing device is in the printed matter. There is still a large deviation between the upper position and the predetermined position, leading to the problem of poor quality of printed matter.
  • FIG. 5 shows a principle block diagram of an inkjet error acquisition device according to an embodiment of the present invention, and the device can be used to implement the inkjet error acquisition method described in Embodiment 1 or any optional implementation thereof.
  • the device includes: a tilt height acquisition module 10 and an inkjet position error calculation module 20.
  • the tilting height obtaining module 10 is used to obtain the tilting height of a predetermined position on the object to be printed.
  • the inkjet position error calculation module 20 is used to obtain the inkjet position error of the predetermined position according to the tilted height of the predetermined position.
  • the error calculation module calculation module 20 may include: a first error calculation unit 21 and an inkjet position error calculation unit 22.
  • the first error calculation unit 21 is used to obtain the first error of the ink jet position when the thickness of the object to be printed increases by a unit distance.
  • the inkjet position error calculation unit 22 is used to obtain the inkjet position error of the predetermined position according to the first error and the tilt height of the predetermined position.
  • the tilting height acquiring module 10 may include: an average tilting acquiring unit 11 and a tilting height acquiring unit 12.
  • the average tilt acquisition unit 11 is used to acquire the average tilt height of the object to be printed.
  • the tilting height acquiring unit 12 is used to determine the average tilting height as the tilting height at the predetermined position of the object to be printed.
  • the average tilt obtaining unit 11 may include an obtaining subunit and a height determining subunit.
  • the obtaining subunit is used to obtain the highest tilting height of the object to be printed.
  • the height determining subunit is used to determine the product of the highest tilting height and the preset parameters as the average tilting height.
  • Fig. 6 shows a principle block diagram of an inkjet error acquisition device according to an embodiment of the present invention, and the device can be used to implement the inkjet error acquisition method described in Embodiment 2 or any optional implementation thereof.
  • the device includes a tilt height acquisition module 30, a theoretical deviation acquisition module 40, an actual deviation calculation module 50 and an inkjet correction module 60.
  • the tilting height obtaining module 30 is used to obtain the tilting height of a predetermined position on the object to be printed.
  • the theoretical deviation obtaining module 40 is used to obtain the theoretical vertical deviation between the ink ejection position of the nozzle and the predetermined position on the object to be printed.
  • the vertical deviation refers to the deviation in the vertical direction.
  • the actual deviation calculation module 50 is used for taking the difference between the theoretical vertical deviation of the predetermined position and the tilting height of the predetermined position as the actual vertical deviation of the predetermined position.
  • the inkjet correction module 60 is used to replace the theoretical vertical deviation of the predetermined position with the actual vertical deviation of the predetermined position to correct the inkjet control method.
  • the tilting height acquiring module 30 may include: an average tilting acquiring unit 31 and a tilting height acquiring unit 32.
  • the average tilt acquisition unit 31 is used to acquire the average tilt height of the object to be printed.
  • the tilting height obtaining unit 32 is used to determine the average tilting height as the tilting height at the predetermined position of the object to be printed.
  • the average tilt acquisition unit 31 may include: a first subunit and a second subunit.
  • the first subunit is used to obtain the highest tilting height of the object to be printed.
  • the second subunit is used to determine the product of the highest tilting height and the preset parameter as the average tilting height.
  • the embodiment of the present invention also provides an inkjet printing device.
  • the inkjet printing device may include a nozzle, an inkjet control device, a tilt height acquisition device, a processor 71, and a memory 72, wherein the processor 71.
  • the memory 72, the inkjet control device, and the tilt height obtaining device may be connected by a bus or other methods. In FIG. 7, the connection by a bus is taken as an example.
  • the inkjet printing device further includes: a distance measuring device for measuring the first deviation between the inkjet position and the inkjet position when the thickness of the object to be printed increases by a unit distance; the clamp is arranged in the printing area of the object to be printed The periphery is used to fix the object to be printed to prevent one side of it from lifting.
  • the device for obtaining the tilted height may include: a detection signal transmitting module, which is arranged on one side of the printing area of the object to be printed, and is used to transmit the detection signal; and the detection signal receiving device is arranged on the printing area of the object to be printed. The other side is used to receive the detection signal transmitted by the detection signal transmitter module.
  • the processor 71 may be a central processing unit (Central Processing Unit, CPU).
  • the processor 71 may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), or Chips such as other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, or a combination of the above types of chips.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • Chips such as other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, or a combination of the above types of chips.
  • the memory 72 can be used to store non-transitory software programs, non-transitory computer executable programs and modules, such as the inkjet error acquisition method in Embodiment 1 of the present invention or the implementation of the present invention
  • the program instructions/modules corresponding to the inkjet correction method in Example 2 for example, the tilt height acquisition module 10 and the inkjet position error calculation module 20 shown in FIG. 5, or the tilt height acquisition module 30 shown in FIG. 6,
  • the processor 71 executes various functional applications and data processing of the processor by running non-transitory software programs, instructions, and modules stored in the memory 72, that is, realizes the inkjet error acquisition method or inkjet error acquisition method in the above method embodiment. Correction method.
  • the memory 72 may include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created by the processor 71 and the like.
  • the memory 72 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices.
  • the memory 72 may optionally include memories remotely provided with respect to the processor 71, and these remote memories may be connected to the processor 71 via a network. Examples of the aforementioned networks include but are not limited to the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
  • the one or more modules are stored in the memory 72, and when executed by the processor 71, the inkjet error acquisition method in the embodiment shown in FIGS. 2 to 3 is executed, or the inkjet error acquisition method is executed as shown in FIG. 4 The inkjet correction method shown.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), a random access memory (RAM), a flash memory (Flash Memory), a hard disk (Hard Disk Drive, abbreviation: HDD) or solid-state drive (Solid-State Drive, SSD), etc.; the storage medium may also include a combination of the foregoing types of memories.

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  • Ink Jet (AREA)

Abstract

公开了喷墨误差获取及喷墨矫正方法、装置及喷墨印刷装置。喷墨误差获取方法包括：获取待印刷对象（1）上预定位置的翘起高度；根据预定位置的翘起高度获取预定位置的喷墨位置误差。通过影响喷墨打印装置的打印精度的影响因素，即待打印对象的翘起高度，提供了基于该影响因素的打印误差计算方法，解决了现有技术中未考虑待印刷对象的翘曲问题时，根据其他已知影响因素引起的误差进行补偿和矫正后，喷墨打印装置所喷的墨在印刷品上的位置和预定位置之间仍然存在较大偏差，导致印刷品的质量不佳的问题。

Description

喷墨误差获取及喷墨矫正方法、装置及喷墨印刷装置 技术领域
本发明涉及喷墨技术领域，尤其涉及到喷墨误差获取及喷墨矫正方法、装置及一种喷墨装置。
背景技术
喷墨技术不仅仅用于传统打印机，在PCB(英文全称：Printed Circuit Board，中文：印刷电路板)方面也有广泛应用，并且也被期待应用于有机发光电子版(英文：Organic Electro-Luminescence，简称：OEL、有机EL)、液晶面板等电子器件的制造工艺中。
在喷墨装置中，印刷时墨的喷落位置偏移与印刷品的质量有很大的关联。喷落位置的偏移受多方面因素的影响，例如：印刷对象的位置偏移、喷嘴的喷墨位置、喷嘴的墨滴喷出角度、墨从喷嘴喷出时的水平速度偏移差等。
发明人发现，现有喷墨方法针对上述影响因数所引起的误差均进行补偿或校正后，所喷的墨在印刷品上的位置和预定位置之间依然有较大偏差，导致印刷品的质量不佳。
发明内容
有鉴于此，本发明实施例提供了喷墨误差获取及喷墨矫正方法、装置及一种喷墨打印装置，以解决现有喷墨方法针对已知影响因数所引起的误差均进行补偿或校正后，所喷的墨在印刷品上的位置和预定位置之间依然有较大偏差，导致印刷品的质量不佳的问题。
为此，根据第一方面，本发明实施例提供了一种喷墨误差获取方法，包括：获取待印刷对象上预定位置的翘起高度；根据预定位置的翘起高度获取预定位置的喷墨位置误差。
通过获取待印刷对象上预定位置的翘起高度，并根据预定位置的翘起高度获取预定位置的喷墨位置误差，即通过提供一种影响喷墨打印装置的打印精度的影响因素(待打印对象的翘起高度)，并提供了基于该影响因素的打印误差计算方法，解决了现有技术中未考虑待印刷对象的翘曲问题时，根据其他已知影响因素引起的误差对进行补偿和矫正后，喷墨打印装置所喷的墨在印刷品上的位置和预定位置之间仍然存在较大偏差，导致印刷品的质量不佳的问题。
结合第一方面，在第一方面第一实施方式中，根据预定位置的翘起高度获取预定位置的喷墨位置误差的步骤，包括：获取当待印刷对象的厚度增加一个单位距离时喷墨位置的第一误差；根据第一误差和预定位置的翘起高度获取预定位置的喷墨位置误差。
结合第一方面，在第一方面第二实施方式中，待印刷对象为板体；获取待印刷对象上预定位置的翘起高度的步骤包括：获取待印刷对象的平均翘起高度；将平均翘起高度确定为待印刷对象上预定位置的翘起高度。
结合第一方面第二实施方式，在第一方面第三实施方式中，获取待印刷对象的平均翘起高度的步骤，包括：获取待印刷对象的最高翘起高度；将最高翘起高度与预设参数的乘积确定为平均翘起高度。
本实施例提供的喷墨误差获取方法，通过获取待印刷对象上预定位置的翘起高度，并根据预定位置的翘起高度获取预定位置的喷墨位置误差， 即通过提供一种影响喷墨打印装置的打印精度的影响因素(待打印对象的翘起高度)，并提供了基于该影响因素的打印误差计算方法，解决了现有技术中未考虑待印刷对象的翘曲问题时，根据其他已知影响因素引起的误差对进行补偿和矫正后，喷墨打印装置所喷的墨在印刷品上的位置和预定位置之间仍然存在较大偏差，导致印刷品的质量不佳的问题。
结合第一方面第三实施方式，在第一方面第四实施方式中，预设参数的取值范围为0.2～0.4。
根据第二方面，本发明实施例提供了一种喷墨矫正方法，包括：获取待印刷对象上预定位置的翘起高度；获取喷嘴出墨位置与待印刷对象上预定位置的理论竖直偏差；竖直偏差是指在竖直方向上的偏差；将预定位置的理论竖直偏差与预定位置的翘起高度的差值作为预定位置的实际竖直偏差；将预定位置的理论竖直偏差替换为预定位置的实际竖直偏差，校正喷墨控制方法。
通过获取待印刷对象上预定位置的翘起高度以及喷嘴出墨位置与待印刷对象上预定位置的理论竖直偏差，并将上述两个数据的差值作为实际竖直偏差，再根据该实际竖直偏差校正喷墨控制方法，即通过提供一种影响喷墨打印装置的打印精度的影响因素(待打印对象的翘起高度)，并提供了基于该影响因素的喷墨矫正方法，解决了现有技术中未考虑待印刷对象的翘曲问题时，根据其他已知影响因素引起的误差对进行补偿和矫正后，喷墨打印装置所喷的墨在印刷品上的位置和预定位置之间仍然存在较大偏差，导致印刷品的质量不佳的问题。
结合第二方面，在第二方面第一实施方式中，待印刷对象为板体；获 取待印刷对象上预定位置的翘起高度的步骤包括：获取待印刷对象的平均翘起高度；将平均翘起高度确定为待印刷对象上预定位置的翘起高度。
结合第二方面第一实施方式，在第二方面第二实施方式中，获取待印刷对象的平均翘起高度的步骤，包括：获取待印刷对象的最高翘起高度；将最高翘起高度与预设参数的乘积确定为平均翘起高度。
结合第二方面第二实施方式，在第二方面第三实施方式中，预设参数的取值范围为0.2～0.4。
根据第三方面，本发明实施例提供了一种喷墨误差获取装置，包括：翘起高度获取模块，用于获取待印刷对象上预定位置的翘起高度；喷墨位置误差计算模块，用于根据预定位置的翘起高度获取预定位置的喷墨位置误差。
结合第三方面，在第三方面第一实施方式中，喷墨位置误差计算模块包括：第一误差计算单元，用于获取当待印刷对象的厚度增加一个单位距离时喷墨位置的第一误差；喷墨位置误差计算单元，用于根据第一误差和预定位置的翘起高度获取预定位置的喷墨位置误差。
结合第三方面第一实施方式，在第三方面第二实施方式中，翘起高度获取模块包括：平均翘起获取单元，用于获取待印刷对象的平均翘起高度；翘起高度获取单元，用于将平均翘起高度确定为待印刷对象预定位置上的翘起高度。
结合第三方面第二实施方式，在第三方面第三实施方式中，平均翘起获取单元包括：获取子单元，用于获取待印刷对象的最高翘起高度；高度确定子单元，用于将最高翘起高度与预设参数的乘积确定为平均翘起高度。
根据第四方面，本发明实施例提供了一种喷墨矫正装置，包括：翘起高度获取模块，用于获取待印刷对象上预定位置的翘起高度；理论偏差获取模块，用于获取喷嘴出墨位置与待印刷对象上预定位置的理论竖直偏差；竖直偏差是指在竖直方向上的偏差；实际偏差计算模块，用于将预定位置的理论竖直偏差与预定位置的翘起高度的差值作为预定位置的实际竖直偏差；喷墨校正模块，用于将预定位置的理论竖直偏差替换为预定位置的实际竖直偏差，校正喷墨控制方法。
结合第四方面，在第四方面第一实施方式中，翘起高度获取模块包括：平均翘起获取单元，用于获取待印刷对象的平均翘起高度；翘起高度获取单元，用于将平均翘起高度确定为待印刷对象预定位置上的翘起高度。
结合第四方面第一实施方式，在第四方面第二实施方式中，平均翘起获取单元包括：获取子单元，用于获取待印刷对象的最高翘起高度；高度确定子单元，用于将最高翘起高度与预设参数的乘积确定为平均翘起高度。
根据第五方面，本发明实施例提供了一种计算机可读存储介质，计算机可读存储介质存储有计算机指令，计算机指令用于使计算机执行第一方面、第一方面的任意一种实施方式、第二方面或者第二方面的任意一种实施方式中所述的方法。
根据第六方面，本发明实施例提供了一种喷墨印刷装置，包括：喷嘴，用于向待印刷对象上的预定位置喷墨；喷墨控制装置，用于控制喷嘴向待印刷对象上的预定位置喷墨；翘起高度获取装置、存储器和处理器，翘起高度获取模块用于获取待印刷对象上预定位置的翘起高度，存储器中存储有计算机指令，处理器通过执行计算机指令，从而执行第一方面、第一方 面的任意一种实施方式、第二方面或者第二方面的任意一种实施方式中所述的方法。
结合第六方面，在第六方面第一实施方式中，喷墨印刷装置还包括：距离测量装置，用于测量当待印刷对象的厚度增加一个单位距离时喷墨位置与的第一偏差。
结合第六第一实施方式方面，在第六方面第二实施方式中，翘起高度获取装置包括：探测信号发射模块，设置于待印刷对象的印刷区域一侧，用于发射探测信号；探测信号接收装置，设置于待印刷对象的印刷区域的另一侧，用于接收探测信号发射模块发射的探测信号。
结合第六方面，在第六方面第三实施方式中，喷墨印刷装置还包括：夹具，设置于待印刷对象的印刷区域的周边，用于固定待印刷对象以防止其一侧翘起。
附图说明
为了更清楚地说明本发明具体实施方式或现有技术中的技术方案，下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1A为墨滴离开喷嘴后的运动轨迹示意图；
图1B为本发明实施例的应用场景示意图；
图2为本发明实施例的喷墨误差获取方法的方法流程图；
图3为本发明另一实施例的喷墨误差获取方法的方法流程图；
图4为本发明实施例的喷墨矫正方法的方法流程图；
图5本发明实施例的喷墨误差获取装置的原理框图；
图6本发明实施例的喷墨矫正装置的原理框图；
图7为本发明实施例喷墨印刷装置的硬件结构示意图；
1-待印刷对象；2-夹具；3-工作台；41-探测信号发射模块；42-探测信号接收模块。
具体实施方式
下面将结合附图对本发明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发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要说明的是，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。
喷墨印刷装置在整个打印过程中，喷墨控制装置控制喷头在水平方向移动，并在喷嘴进入打印区域后，控制喷嘴将墨滴喷射到待印刷对象上。由于喷嘴一直在水平方向移动，在惯性作用下，墨滴在离开喷嘴后仍保持与喷嘴相同的水平方向的速度，因此，喷墨过程墨滴不是以直线形式垂直下落，而是以如图1A所示的抛物线形式下落，这样就会造成墨滴开始下落的位置和墨滴落在待印刷对象上的位置有一段偏移量S。因此，为了满足精确打印的要求，使墨滴经过抛物线运动后落到待印刷对象的指定位置，需要确定偏移量S的值的大小，从而确定喷嘴喷出墨滴的位置(或者时间)。由于偏移量的计算公式为：
S＝V·T，
H＝V 0·T+gT 2/2，
其中，V是指墨滴的水平方向的速度，T是指墨滴的下落时间，H是指喷嘴与待印刷对象之间的距离，V 0是指墨滴的初始竖直下落速度，并且喷嘴喷出的墨滴的初始竖直下落速度V 0几乎恒定不变，墨滴下落时间T主要由印刷对象与喷嘴之间的距离H决定，因此，偏移量S的主要影响因素为墨滴的水平方向的速度V和待印刷对象与喷嘴之间的距离H。
发明人发现，当根据喷头的水平移动速度(即为墨滴的水平方向的速度V)以及印刷对象与喷嘴之间的理论距离H确定了喷嘴喷出墨滴的位置(或者时间)后，若喷墨印刷装置的若干个待印刷对象出现不同程度的变形翘曲，将会导致待印刷对象与喷嘴之间的实际距离与理论距离之间出现不同大小的差值，从而使墨滴的实际喷落位置相对于理论喷落位置产生不同大小的偏移量。因此，若仍直接根据上述确定的喷嘴喷出墨滴的位置(或时间)对翘曲印刷对象进行打印，将会降低打印精度，导致打印质量较差的问题的产生。基于此，发明人提出了本发明实施例所提供的喷墨误差获取方法和喷墨矫正方法，下文将对该方法做具体介绍。
图1B示出了本发明实施例的一个应用场景示意图，其中示有一喷墨印刷装置，包括：待印刷对象1、工作台3、夹具2、翘起高度获取装置、喷嘴(图中未示出)和喷嘴控制装置(图中未示出)。
待印刷对象1被若干个夹具2固定设置于工作台3上，并且，待印刷对象1的至少两个侧边均设置有多个夹具2，具体地，当待印刷对象1的两个侧边被夹具2夹持时，该两个侧边为待印刷对象1相对的两个侧边。在 这里，夹具2由于固定待印刷对象1以防止其一侧翘起，需要说明的是，虽然待印刷对象1的侧边被夹具2固定时不会翘起，但是待印刷对象1的中间位置仍有可能会变现翘曲(一般为中间凸起)。
翘起高度获取装置包括，设置于待印刷对象1的印刷区域一侧，用于发射探测信号的探测信号发射模块41，以及设置于待印刷对象1的印刷区域的另一侧，用于接收探测信号发射模块41发射的探测信号的探测信号接收模块42。翘起高度获取装置的线扫描起始位置为工作台3的上表面(待印刷对象1设置于工作台3的上表面)，翘起高度获取装置自线扫描起始位置开始对待印刷对象1进行扫描，直至探测信号接收模块42开始接收到探测信号发射模块发射41的探测信号，得到待印刷对象1的高度测量结果。
喷墨印刷装置的喷头设置于待印刷对象1的上方，并且喷头上的喷嘴朝向待印刷对象1，喷头可以在喷头控制装置的驱动下朝向第一方向(如图1B中虚线箭头所示的X方向)或者第二方向移动(如图1B中虚线箭头所示的Y方向)移动，从而对待印刷对象1的不同位置进行喷墨。
实施例1
图2示出了根据本发明实施例的一种喷墨误差获取方法的流程图，该方法可以用于但不限于图1B所示的喷墨印刷装置，用于检测喷头的喷墨误差。如图2所示，该方法包括如下步骤：
步骤S101，获取待印刷对象上预定位置的翘起高度。
在本实施例中，当该方法用于图1B所示的喷墨印刷装置时，可以基于获取图1B中所示的翘起高度获取装置的反馈的高度测量结果，计算待印刷对象上预定位置的翘起高度。当然，本方法并不限于图1B所示的喷墨印刷 装置，例如，还可以通过在待印刷对象上预定位置的上方，并与喷墨打印装置的喷嘴位于同一水平面的位置处设置如激光测距仪、声波测距仪等高度测量装置测量喷嘴到预定位置的实际距离，再与喷嘴到未翘起待印刷对象的基准距离进行差值计算的方式，获取待印刷对象上预定位置的翘起高度。
步骤S102，根据预定位置的翘起高度获取预定位置的喷墨位置误差。
本发明实施例提供的喷墨误差获取方法，通过获取待印刷对象上预定位置的翘起高度，并根据预定位置的翘起高度获取预定位置的喷墨位置误差，即通过提供一种影响喷墨打印装置的打印精度的影响因素(待打印对象的翘起高度)，并提供了基于该影响因素的打印误差计算方法，解决了现有技术中未考虑待印刷对象的翘曲问题时，根据其他已知影响因素引起的误差对进行补偿和矫正后，喷墨打印装置所喷的墨在印刷品上的位置和预定位置之间仍然存在较大偏差，导致印刷品的质量不佳的问题。
图3示出了根据本发明实施例的另一种喷墨误差获取方法的流程图，在本实施例中，以应用于图1B所示的应用场景来描述本发明实施例的喷墨误差获取方法。如图3所示，该方法包括如下步骤：
步骤S201，获取待印刷对象的最高翘起高度。
在具体实施例中，由于翘起高度获取装置的线扫描起始位置为工作台的上表面，翘起高度获取装置在驱动装置的驱动下自线扫描起始位置开始对待印刷对象进行扫描，直至探测信号接收模块开始接收到探测信号发射模块发射的探测信号，得到一高度测量结果，因此，该高度测量结果为待印刷对象背离工作台的最高翘起处到工作台上表面的高度，则可以通过以 下公式计算待印刷对象的最高翘起高度：
ΔH＝H 测-H 板，
其中，ΔH是指待印刷对象的最高翘起高度，H 测是指翘起高度获取装置的高度测量结果，H 板是指待印刷对象的厚度。
步骤S202，将最高翘起高度与预设参数的乘积确定为平均翘起高度。
在本实施例中，预设参数的取值根据待印刷对象存在翘起的面积大小相对于待印刷对象整体面积的大小的比例，以及待印刷对象上需要印刷的图案等实际应用场景的情况进行确定，即，通过以下公式计算待印刷对象的平均翘起高度：
ΔH'＝ΔH·k 1，
其中，ΔH'是指待印刷对象的平均翘起高度，ΔH是指待印刷对象的最高翘起高度，k 1是指预设参数。具体地，可以将预设参数k 1设置为0.2～0.4中任一所需的值，如选择0.2、0.25、0.36、0.4等。
步骤S203，将平均翘起高度确定为待印刷对象上预定位置的翘起高度。
步骤S204，根据预定位置的翘起高度获取预定位置的喷墨位置误差。
在这里，可以通过获取当待印刷对象的厚度为“基准厚度”时的墨滴偏移量S 1，再获取当待印刷对象的厚度为“基准厚度+待印刷对象的平均翘起高度ΔH'”时的墨滴偏移量S 2，从而得到待印刷对象上预定位置的喷墨位置误差(ΔS＝S 2-S 1)，当然，这里的厚度为“基准厚度”的待印刷对象以及厚度为“基准厚度+待印刷对象的平均翘起高度”的待印刷对象均是未变形翘曲的待印刷对象。此外，还可以通过获取待印刷对象的厚度增加一个单位距离时喷墨位置的第一误差k 2(当喷嘴喷出的墨滴的初始竖直下落速度V 0 保持恒定，喷墨印刷装置的喷头的水平移动速度，即墨滴的水平方向的速度为V k时，待印刷对象的厚度增加一个单位距离时喷墨位置产生的偏差)，再计算第一误差k 2与待印刷对象的平均翘起高度ΔH'的乘积的方式，计算待印刷对象上预定位置的喷墨位置误差，具体地，通过以下公式计算喷墨位置误差：
ΔS＝ΔH'·k 2·V/V k，
ΔH'＝ΔH·k 1，
其中，ΔS是指喷墨位置误差，ΔH'是指待印刷对象上预定位置的翘起高度，k 2是指墨滴的水平方向的速度为V k时的第一误差，V是指墨滴喷落时的实际水平速度，ΔH是指待印刷对象的最高翘起高度，k 1是指预设参数。
本实施例提供的喷墨误差获取方法，通过获取待印刷对象上预定位置的翘起高度，并根据预定位置的翘起高度获取预定位置的喷墨位置误差，即通过提供一种影响喷墨打印装置的打印精度的影响因素(待打印对象的翘起高度)，并提供了基于该影响因素的打印误差计算方法，解决了现有技术中未考虑待印刷对象的翘曲问题时，根据其他已知影响因素引起的误差对进行补偿和矫正后，喷墨打印装置所喷的墨在印刷品上的位置和预定位置之间仍然存在较大偏差，导致印刷品的质量不佳的问题。
实施例2
图4示出了根据本发明实施例的一种喷墨矫正方法的流程图，该方法可以用于但不限于图1B所述的喷墨印刷装置，用于辅助矫正喷嘴的喷墨位置误差。如图4所示，该方法包括如下步骤：
S301，获取待印刷对象上预定位置的翘起高度。在这里，预定位置的 翘起的高度的具体计算方法可以参照实施例1来理解，在此不再赘述。
S302，获取喷嘴出墨位置与待印刷对象上预定位置的理论竖直偏差。在这里，竖直偏差是指在竖直方向上的偏差，理论竖直偏差是指理论上待印刷对象不存在变形翘曲时，待印刷对象与喷嘴在竖直方向上的距离。
S303，将预定位置的理论竖直偏差与预定位置的翘起高度的差值作为预定位置的实际竖直偏差。在这里，实际竖直偏差是指实际上，待打印对象存在翘曲时，喷嘴出墨位置到待印刷对象上预定位置在竖直方向上的距离。
S304，将预定位置的理论竖直偏差替换为预定位置的实际竖直偏差，校正喷墨控制方法。
在本实施例中，根据实际竖直偏差计算墨滴自喷嘴中喷出后直至下落到待印刷对象上的实际横向偏移，从而确定墨滴的实际喷出位置，完成对喷墨控制方法的校正，具体地，通过以下公式计算实际横向偏移：
S'＝V·t，
H'＝V 0t+gt·t/2，
H'＝H-ΔH'，
其中，S'是指实际横向偏移，V是指墨滴喷落时的实际水平速度，t是指墨滴自喷嘴中喷出直至下落到待印刷对象上的时间，H'是指实际竖直偏差，V 0是指墨滴的初始竖直下落速度，H是指理论竖直偏差，ΔH'是指待印刷对象上预定位置的翘起高度。
本实施例提供的喷墨矫正方法，通过获取待印刷对象上预定位置的翘起高度以及喷嘴出墨位置与待印刷对象上预定位置的理论竖直偏差，并将 上述两个数据的差值作为实际竖直偏差，再根据该实际竖直偏差校正喷墨控制方法，即通过提供一种影响喷墨打印装置的打印精度的影响因素(待打印对象的翘起高度)，并提供了基于该影响因素的喷墨矫正方法，解决了现有技术中未考虑待印刷对象的翘曲问题时，根据其他已知影响因素引起的误差对进行补偿和矫正后，喷墨打印装置所喷的墨在印刷品上的位置和预定位置之间仍然存在较大偏差，导致印刷品的质量不佳的问题。
实施例3
图5示出了本发明实施例的喷墨误差获取装置的原理框图，该装置可以用于实现实施例1或者其任意可选实施方式所述的喷墨误差获取方法。如图5所示，该装置包括：翘起高度获取模块10和喷墨位置误差计算模块20。
翘起高度获取模块10用于获取待印刷对象上预定位置的翘起高度。
喷墨位置误差计算模块20用于根据预定位置的翘起高度获取预定位置的喷墨位置误差。
作为本发明实施例的一种可选实施方式，误差计算模块计算模20可以包括：第一误差计算单元21和喷墨位置误差计算单元22。
第一误差计算单元21用于获取当待印刷对象的厚度增加一个单位距离时喷墨位置的第一误差。
喷墨位置误差计算单元22用于根据第一误差和预定位置的翘起高度获取预定位置的喷墨位置误差。
作为本发明实施例的一种可选实施方式，翘起高度获取模块10可以包括：平均翘起获取单元11和翘起高度获取单元12。
平均翘起获取单元11用于获取待印刷对象的平均翘起高度。
翘起高度获取单元12用于将平均翘起高度确定为待印刷对象预定位置上的翘起高度。
作为本发明实施例的一种可选实施方式，平均翘起获取单元11可以包括获取子单元和高度确定子单元。
获取子单元用于获取待印刷对象的最高翘起高度。
高度确定子单元用于将最高翘起高度与预设参数的乘积确定为平均翘起高度。
实施例4
图6示出了本发明实施例的喷墨误差获取装置的原理框图，该装置可以用于实现实施例2或者其任意可选实施方式所述的喷墨误差获取方法。如图6所示，该装置包括翘起高度获取模块30，理论偏差获取模块40，实际偏差计算模块50和喷墨校正模块60。
翘起高度获取模块30用于获取待印刷对象上预定位置的翘起高度。
理论偏差获取模块40用于获取喷嘴出墨位置与待印刷对象上预定位置的理论竖直偏差。在这里，竖直偏差是指在竖直方向上的偏差。
实际偏差计算模块50用于将预定位置的理论竖直偏差与预定位置的翘起高度的差值作为预定位置的实际竖直偏差。
喷墨校正模块60用于将预定位置的理论竖直偏差替换为预定位置的实际竖直偏差，校正喷墨控制方法。
作为本发明实施例的一种可选实施方式，翘起高度获取模块30可以包括：平均翘起获取单元31和翘起高度获取单元32。
平均翘起获取单元31用于获取待印刷对象的平均翘起高度。
翘起高度获取单元32用于将平均翘起高度确定为待印刷对象预定位置上的翘起高度。
作为本发明实施例的一种可选实施方式，平均翘起获取单元31可以包括：第一子单元和第二子单元。
第一子单元用于获取待印刷对象的最高翘起高度。
第二子单元用于将最高翘起高度与预设参数的乘积确定为平均翘起高度。
本发明实施例还提供了一种喷墨印刷装置，如图7所示，该喷墨印刷装置可以包括喷嘴、喷墨控制装置、翘起高度获取装置、处理器71和存储器72，其中处理器71、存储器72、喷墨控制装置和翘起高度获取装置可以通过总线或者其他方式连接，图7中以通过总线连接为例。在一些实施例中，喷墨印刷装置还包括：距离测量装置，用于测量当待印刷对象的厚度增加一个单位距离时喷墨位置与的第一偏差；夹具，设置于待印刷对象的印刷区域的周边，用于固定待印刷对象以防止其一侧翘起。
在一些实施例中，翘起高度获取装置可以包括：探测信号发射模块，设置于待印刷对象的印刷区域一侧，用于发射探测信号；探测信号接收装置，设置于待印刷对象的印刷区域的另一侧，用于接收探测信号发射模块发射的探测信号。
关于喷嘴、喷墨控制装置、翘起高度获取装置的具体描述请参见实施例一之前关于应用场景的描述。
处理器71可以为中央处理器(Central Processing Unit，CPU)。处理 器71还可以为其他通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field-Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等芯片，或者上述各类芯片的组合。
存储器72作为一种非暂态计算机可读存储介质，可用于存储非暂态软件程序、非暂态计算机可执行程序以及模块，如本发明实施例1中的喷墨误差获取方法或者本发明实施例2中的喷墨矫正方法对应的程序指令/模块(例如，图5所示的翘起高度获取模块10和喷墨位置误差计算模块20，或者图6所示的翘起高度获取模块30，理论偏差获取模块40，实际偏差计算模块50和喷墨校正模块60)。处理器71通过运行存储在存储器72中的非暂态软件程序、指令以及模块，从而执行处理器的各种功能应用以及数据处理，即实现上述方法实施例中的喷墨误差获取方法或者喷墨矫正方法。
存储器72可以包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需要的应用程序；存储数据区可存储处理器71所创建的数据等。此外，存储器72可以包括高速随机存取存储器，还可以包括非暂态存储器，例如至少一个磁盘存储器件、闪存器件、或其他非暂态固态存储器件。在一些实施例中，存储器72可选包括相对于处理器71远程设置的存储器，这些远程存储器可以通过网络连接至处理器71。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
所述一个或者多个模块存储在所述存储器72中，当被所述处理器71 执行时，执行如图2-图3所示实施例中的喷墨误差获取方法，或者执行如图4所示的喷墨矫正方法。
上述探头定位偏差检测系统具体细节可以对应参阅图2-图4所示的实施例中对应的相关描述和效果进行理解，此处不再赘述。
本领域技术人员可以理解，实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)、随机存储记忆体(Random Access Memory，RAM)、快闪存储器(Flash Memory)、硬盘(Hard Disk Drive，缩写：HDD)或固态硬盘(Solid-State Drive，SSD)等；所述存储介质还可以包括上述种类的存储器的组合。
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本发明创造的保护范围之中。

Claims (16)

  1. 一种喷墨误差获取方法，其特征在于，包括：
    获取待印刷对象上预定位置的翘起高度；
    根据所述预定位置的翘起高度获取所述预定位置的喷墨位置误差。
  2. 根据权利要求1所述的喷墨误差获取方法，其特征在于，所述根据所述预定位置的翘起高度获取所述预定位置的喷墨位置误差的步骤，包括：
    获取当待印刷对象的厚度增加一个单位距离时喷墨位置的第一误差；
    根据所述第一误差和所述预定位置的翘起高度获取所述预定位置的喷墨位置误差。
  3. 一种喷墨矫正方法，其特征在于，包括：
    获取待印刷对象上预定位置的翘起高度；
    获取喷嘴出墨位置与所述待印刷对象上所述预定位置的理论竖直偏差；所述竖直偏差是指在竖直方向上的偏差；
    将所述预定位置的理论竖直偏差与所述预定位置的翘起高度的差值作为所述预定位置的实际竖直偏差；
    将所述预定位置的理论竖直偏差替换为所述预定位置的实际竖直偏差，校正喷墨控制方法。
  4. 根据权利要求1或3所述的方法，其特征在于，所述待印刷对象为板体；所述获取待印刷对象上预定位置的翘起高度的步骤包括：
    获取所述待印刷对象的平均翘起高度；
    将所述平均翘起高度确定为所述待印刷对象上预定位置的翘起高度。
  5. 根据权利要求4所述的方法，其特征在于，获取所述待印刷对象的平 均翘起高度的步骤，包括：
    获取所述待印刷对象的最高翘起高度；
    将所述最高翘起高度与预设参数的乘积确定为所述平均翘起高度。
  6. 根据权利要求5所述的方法，其特征在于，所述预设参数的取值范围为0.2～0.4。
  7. 一种喷墨误差获取装置，其特征在于，包括：
    翘起高度获取模块，用于获取待印刷对象上预定位置的翘起高度；
    喷墨位置误差计算模块，用于根据所述预定位置的翘起高度获取所述预定位置的喷墨位置误差。
  8. 根据权利要求7所述的喷墨误差获取装置，其特征在于，所述喷墨位置误差计算模块包括：
    第一误差计算单元，用于获取当待印刷对象的厚度增加一个单位距离时喷墨位置的第一误差；
    喷墨位置误差计算单元，用于根据所述第一误差和所述预定位置的翘起高度获取所述预定位置的喷墨位置误差。
  9. 一种喷墨矫正装置，其特征在于，包括：
    翘起高度获取模块，用于获取待印刷对象上预定位置的翘起高度；
    理论偏差获取模块，用于获取喷嘴出墨位置与所述待印刷对象上所述预定位置的理论竖直偏差；所述竖直偏差是指在竖直方向上的偏差；
    实际偏差计算模块，用于将所述预定位置的理论竖直偏差与所述预定位置的翘起高度的差值作为所述预定位置的实际竖直偏差；
    喷墨校正模块，用于将所述预定位置的理论竖直偏差替换为所述预定 位置的实际竖直偏差，校正喷墨控制方法。
  10. 根据权利要求7或9所述的装置，其特征在于，所述翘起高度获取模块包括：
    平均翘起获取单元，用于获取所述待印刷对象的平均翘起高度；
    翘起高度获取单元，用于将所述平均翘起高度确定为所述待印刷对象预定位置上的翘起高度。
  11. 根据权利要求10所述的装置，其特征在于，所述平均翘起获取单元包括：
    获取子单元，用于获取所述待印刷对象的最高翘起高度；
    高度确定子单元，用于将所述最高翘起高度与预设参数的乘积确定为所述平均翘起高度。
  12. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机指令，所述计算机指令用于使所述计算机执行权利要求1至6任一项所述的方法。
  13. 一种喷墨印刷装置，其特征在于，包括：
    喷嘴，用于向待印刷对象上的预定位置喷墨；
    喷墨控制装置，用于控制所述喷嘴向待印刷对象上的预定位置喷墨；
    翘起高度获取装置、存储器和处理器，所述翘起高度获取模块用于获取待印刷对象上预定位置的翘起高度，所述存储器中存储有计算机指令，所述处理器通过执行所述计算机指令，从而执行权利要求1至6任一项所述的方法。
  14. 根据权利要求13所述的喷墨印刷装置，其特征在于，还包括：
    距离测量装置，用于测量当待印刷对象的厚度增加一个单位距离时喷墨位置与的第一偏差。
  15. 根据权利要求14所述的喷墨印刷装置，其特征在于，所述翘起高度获取装置包括：
    探测信号发射模块，设置于所述待印刷对象的印刷区域一侧，用于发射探测信号；
    探测信号接收装置，设置于所述待印刷对象的印刷区域的另一侧，用于接收所述探测信号发射模块发射的探测信号。
  16. 根据权利要求13所述的喷墨印刷装置，其特征在于，还包括：
    夹具，设置于所述待印刷对象的印刷区域的周边，用于固定所述待印刷对象以防止其一侧翘起。
PCT/CN2019/081810 2019-01-31 2019-04-08 喷墨误差获取及喷墨矫正方法、装置及喷墨印刷装置 WO2020155382A1 (zh)

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