System for measuring composition of ink droplet and method for measuring composition of ink droplet

Abstract

A system for measuring a composition of an ink droplet and a method for measuring a composition of an ink droplet for a more precise fine ink jet printing process are provided. The system includes: a camera device configured to generate first image data including a plurality of first ink droplets within a first target range among a plurality of ink droplets discharged to and present on a substrate; a laser irradiation device configured to generate a plurality of particles by irradiating each of the plurality of first ink droplets with a laser beam; a particle suction assembly spaced apart from the base by a distance, and the particle suction assembly comprising an inner surface, the inner surface being a Coanda surface and protruding inwardly; a gas injection device configured to inject an inert gas into the particle suction assembly to move the inert gas along the Coanda surface; and a mass spectrometry device configured to measure a mass spectrum of the plurality of particles extracted with the inert gas through the particle suction assembly.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and all benefits derived from Korean Patent Application No. 10-2023-0131161, filed on September 27, 2023, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] One or more embodiments relate to a system for measuring components of an ink droplet and a method for measuring components of an ink droplet, and more particularly, to a system for measuring components of an ink droplet and a method for measuring components of an ink droplet for a more accurate fine inkjet printing process. Background Art

[0004] Industrial inkjet printers can use not only ordinary dyes, but also metal materials (such as, for example, copper, gold and silver), ceramics and polymers as printing solutions. Direct printing methods on various targets such as substrates, films, fabrics and displays can be used for industrial graphics, displays and solar cells. Specifically, in the field of displays, processes using inkjet printers can be applied to the manufacture of color filters, liquid crystal orientation processes, the manufacture of organic emission layers and the manufacture of quantum dot emission layers. The inkjet printing device may include an inkjet print head comprising at least one ink transfer channel (or nozzle).

[0005] Among the materials contained in the ink, a specific material in the ink may precipitate over time. Depending on the environment in which the inkjet printing process is performed, the concentration of the specific material contained in the ink discharged from the nozzle may change. Summary of the invention

[0006] One or more embodiments include a system for measuring the composition of ink droplets and a method of measuring the composition of ink droplets for a more accurate fine inkjet printing process. However, these objects are examples and do not limit the scope of the present disclosure.

[0007] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the presented embodiments of the disclosure.

[0008] According to one or more embodiments, a system for measuring components of an ink droplet includes: a camera device configured to generate first image data, the first image data including a plurality of first ink droplets within a first target range among a plurality of ink droplets discharged into and present on a substrate; a laser irradiation device configured to generate a plurality of particles by irradiating each of the plurality of first ink droplets with a laser beam; a particle suction assembly spaced a certain distance from the substrate, and the particle suction assembly includes an inner surface, wherein the inner surface is a Coanda surface and bulges inwardly; a gas injection device configured to inject an inert gas into the particle suction assembly to move the inert gas along the Coanda surface; and a mass spectrometer measurement device configured to measure the mass spectrum of the plurality of particles extracted by the inert gas through the particle suction assembly.

[0009] The particle suction assembly may include an inlet through which the inert gas is injected from the outside of the particle suction assembly, and an outlet through which the inert gas is discharged from the particle suction assembly.

[0010] The particle suction assembly may further include a guide configured to guide the inert gas to be discharged along the Coanda surface.

[0011] The system may further include a driving stage configured to move the substrate to change a target irradiated with the laser beam.

[0012] The system may further include a computing device configured to obtain first grayscale information for each of the plurality of first ink droplets based on the first image data.

[0013] The calculation device may obtain first concentration information of a target material included in each of the plurality of first ink droplets based on the first grayscale information.

[0014] The calculation device may obtain second concentration information of the target material included in each of the plurality of first ink droplets based on the mass spectrum.

[0015] The calculation device may obtain offset data based on the first concentration information and the second concentration information.

[0016] The camera device may obtain second image data including a plurality of second ink drops within a second target range among the plurality of ink drops.

[0017] The computing device may obtain second grayscale information for each of the plurality of second ink droplets based on the second image data.

[0018] The calculation device may obtain third concentration information of the target material included in each of the plurality of second ink droplets based on the second grayscale information and the offset data.

[0019] The calculation device may generate printing sequence information based on the third density information, and generate a control instruction for executing a printing process based on the printing sequence information.

[0020] The target material may include TiO 2 .

[0021] According to one or more embodiments, a method for measuring the components of an ink droplet includes the following steps: obtaining first grayscale information for each of a plurality of first ink droplets within a first target range among a plurality of ink droplets discharged to and present on a substrate; obtaining first concentration information of a target material included in each of the plurality of first ink droplets based on the first grayscale information; obtaining a mass spectrum for each of the plurality of first ink droplets; obtaining second concentration information of the target material included in each of the plurality of first ink droplets based on the mass spectrum; obtaining offset data based on the first concentration information and the second concentration information; obtaining second grayscale information for each of a plurality of second ink droplets within a second target range among the plurality of ink droplets; and obtaining third concentration information of the target material included in each of the plurality of second ink droplets based on the second grayscale information and the offset data.

[0022] The method may further include generating printing order information based on the third density information.

[0023] The method may further include generating a control instruction for performing a printing process based on the printing sequence information.

[0024] The obtaining of the first grayscale information may include: generating a preparation instruction for a print head; generating a control instruction for discharging the plurality of ink droplets onto the substrate; and obtaining first image data including the first ink droplets.

[0025] The obtaining of the first grayscale information may further include obtaining the first grayscale information for each of the plurality of first ink droplets based on the first image data.

[0026] Obtaining the second concentration information of the target material may include: obtaining the second concentration information of the target material included in each of the multiple first ink droplets based on a pre-prepared concentration-mass spectrum curve; and obtaining volume information of each of the multiple first ink droplets, and quantifying the second concentration information based on the volume information.

[0027] The target material may include TiO 2 . BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent through the following description in conjunction with the accompanying drawings, in which:

[0029] Figure 1 is a schematic conceptual diagram of a printing system according to one or more embodiments of the present disclosure;

[0030] Figure 2 The present invention is a diagram showing one or more embodiments of the present invention. Figure 1 A schematic cross-sectional view of an example of a print head;

[0031] Figure 3 is a schematic conceptual diagram of a system for measuring components of an ink droplet according to one or more embodiments of the present disclosure;

[0032] Figure 4 According to one or more embodiments of the present disclosure Figure 3 A schematic cross-sectional view of a device for measuring components of an ink droplet;

[0033] Figure 5 It is shown Figure 4 A schematic cross-sectional view of a portion A of ; and

[0034] Figure 6 is a schematic flow chart of a method of measuring components of an ink droplet according to one or more embodiments of the present disclosure. DETAILED DESCRIPTION

[0035] Now will refer to embodiment in detail, the example of embodiment is shown in the accompanying drawings, wherein, the same reference numerals refer to the same element from time to time.In this respect, the embodiment presented can have different forms and should not be construed as being limited to the description set forth herein.Therefore, only by referring to the accompanying drawings, the embodiment is described in this article to illustrate the aspect of this specification.As used herein, the term "and / or" includes any combination and all combinations of one or more related listed items.Throughout this disclosure, the statement "at least one (kind / person) of a, b and c" represents only a, only b, only c, both a and b, both a and c, both b and c, all of a, b and c or its variant.

[0036] Because the present disclosure allows for various variations and numerous embodiments, specific embodiments will be illustrated in the drawings and will be described in the written description. A full understanding of the embodiments, their advantages, and the goals achieved by the implementation of the present disclosure is obtained by reference to the drawings used to illustrate the embodiments. However, the present disclosure is not limited to the embodiments disclosed below, but can be implemented in a variety of different forms.

[0037] Hereinafter, the present disclosure will be described in detail by explaining embodiments with reference to the accompanying drawings, in which the same reference numerals denote the same elements and repeated description thereof will not be given.

[0038] In the present specification, terms such as first and second are used for the purpose of distinguishing one component from another component, and have no limiting meaning. In the following embodiments, unless the context clearly states otherwise, a singular expression includes a plural expression.

[0039] In the following embodiments, when an element such as, for example, a layer, a film, a region, and a plate is referred to as being “on” another element, the element may be directly on the other element, or one or more intervening elements may be present.

[0040] For the convenience of explanation, components may be exaggerated or reduced in the drawings. For example, the size and thickness of the elements shown in the drawings are for the purpose of convenience of description, and therefore, the present disclosure is not necessarily limited thereto.

[0041] In the present specification, terms such as include, have, contain or contain as examples indicate the presence of features or elements described in the specification, and do not exclude the possibility that one or more other features or elements may be added.

[0042] In this specification, when various components such as layers, films, regions and panels are referred to as being “on” other components, this includes the case where the component is “directly on” the other component and the case where other components are located between the component and the other component.

[0043] When any embodiment can be implemented, the specific process order can be different from the described order. For example, aspects of the present disclosure support embodiments in which the process order is different from the process order described with reference to another embodiment. For example, two processes described in succession can be performed substantially simultaneously, or can be performed in an order opposite to the order described. As used herein, the term "substantially" means (e.g., within a threshold difference amount) approximately or actually the same.

[0044] In this specification, the expression "A and / or B" means A, B, or A and B. In addition, the expression "at least one of A and B" means A, B, or A and B.

[0045] In this specification, the description of the connection of films, regions, components, etc. may include the case where the films, regions, components, etc. are directly connected and / or the case where other films, regions, components, etc. are located between the films, regions, components, etc. For example, the description of the electrical connection of films, regions, components, etc. may indicate the case where the films, regions, components, etc. are directly electrically connected and / or the case where another film, another region, another component, etc. are located between the films, regions, components, etc., and are indirectly electrically connected.

[0046] In this specification, the x-axis, y-axis, and z-axis are not limited to the three axes of the Cartesian coordinate system, and can be interpreted in a broad sense including these three axes. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, or may refer to different directions that are not orthogonal to each other.

[0047] Figure 1 is a schematic conceptual diagram of a printing system according to one or more embodiments of the present disclosure.

[0048] like Figure 1 As shown in FIG, the printing system may include a user device 10, a controller 20, a printing device 30, a substrate 300, and a driving stage 320. For example, the printing device 30 may perform a printing operation based on printing data from the controller 20 or a separate driving signal generated based on the printing data.

[0049] The controller 20 may generate a driving signal for driving a printing operation of the printing device 30. Additionally or alternatively, the controller 20 may generate printing data.

[0050] The printing data may be or include data converted into a preset format for driving the printing device 30. For example, the printing data may include position data for a position of the printing device 30 at which ink is to be discharged, and volume data for the amount of ink to be discharged from each nozzle provided in the printing device 30. The terms "jetting ink" and "discharging ink" may be used interchangeably herein.

[0051] The driving signal is a signal waveform, and may be a signal for instructing a printing operation of the printing device 30. For example, based on the waveform or frequency of the driving signal, the printing system (e.g., the controller 20) may control the position of the printing device 30 at which ink is discharged (or to be discharged) and / or determine the amount of ink to be discharged from each nozzle.

[0052] For example, the controller 20 and the printing device 30 may transmit and receive data, and the printing device 30 may receive a driving signal from the controller 20. The printing device 30 may perform a printing operation according to the received driving signal.

[0053] The user device 10 is a computing device for executing application programs and applications, etc. The user device 10 may be a user device, a computer, or a server, etc. The user device 10 may receive a user input from a user, convert the received user input into a data signal, and send the data signal to the controller 20.

[0054] Although not shown, the user device 10 can be connected to an input device and an output device via a wired connection and / or wirelessly. The input device can be a user interface, such as a keypad, a dome switch, a touch pad (e.g., a contact capacitance method, a pressure-resistant film method, an infrared detection method, a surface ultrasonic conduction method, an integral tension measurement method or a piezoelectric effect method, etc.), a mouse, a remote controller, a rotary knob and a roller switch. The output device can include a display. The display provides a result image output from the user device 10, allowing the operator to monitor the displayed image. The display can provide visual information and / or auditory information about the printing operation to the operator. The display can be a computer screen, a television (TV) screen, a mobile terminal screen or a projector. In the example where the display is a touch screen, the touch screen can be used as an input device.

[0055] The printing device 30 is a device capable of discharging ink to a desired position of the substrate 300 as described herein (e.g., to a target position on the substrate 300), and the printing device 30 may be a device capable of performing an inkjet printing operation. For example, the printing device 30 may perform a printing operation based on a drive signal. In an example, the drive signal may include a virtual drive signal, a first drive signal, and a second drive signal.

[0056] The substrate 300 is a target for printing, and the substrate 300 may be a target onto which ink is discharged. For example, the printing device 30 may discharge ink onto one or more target areas of the substrate 300. The drive stage 320 may be disposed below the substrate 300. In an example, the drive stage 320 and the substrate 300 are fixed to each other, and when the drive stage 320 moves, the substrate 300 may move together with the drive stage 320. In another example, the drive stage 320 may be stationary (for example, so that the drive stage 320 does not move), and the substrate 300 disposed on the drive stage 320 may move alone. For example, the substrate 300 may be moved on the drive stage 320 by an air flotation technique, and the drive stage 320 may be a component for applying the air flotation technique to the substrate 300.

[0057] The driving device (not shown) may move the substrate 300 based on the number of pulses. For example, the driving device may move the substrate 300 based on the number of pulses of the electrical signal sent from the driving circuit. In an example, the driving device (not shown) may include a motor that moves the substrate 300 based on the number of pulses. In an example, the driving device (not shown) may be a device that can discharge air in association with moving the substrate 300 and / or the driving stage 320, and the driving device may discharge air based on the number of pulses. For example, the driving device (not shown) may be a component that moves the substrate 300 by moving the driving stage 320. In another example, the driving device (not shown) may be a component that moves the substrate 300 floating on the driving stage 320 alone.

[0058] The print head may be a head of the inkjet printing device 30. The print head may include at least one nozzle for discharging ink material. In an example where the print head includes a plurality of nozzles, the plurality of nozzles may be spaced apart by a specific distance. In an example, the print head may discharge ink onto the upper surface of the substrate 300 according to a cycle obtained based on information about the number of pulses.

[0059] According to one or more embodiments, the printing data may include position data for a position of the printing device 30 at which the printing device 30 is to discharge ink and volume data of an amount of ink to be discharged from each nozzle provided in the printing device 30 .

[0060] Figure 2 It is shown Figure 1 Schematic cross-sectional view of an example of a print head.

[0061] For reference, in Figure 2 In the description of Figure 1 Descriptions that are identical or redundant to the descriptions. Figure 2 The print head may be a component that prints a preset pattern on the substrate 300 by using a quantum dot ink composition or an organic ink composition used in an organic light emitting display, or the like.

[0062] like Figure 2 As shown in, the print head may include chambers SPA1 and SPA2 storing ink for inkjet printing. The print head may include an ejection assembly NA that discharges ink from the chambers SPA1 and SPA2 to the outside. The chambers SPA1 and SPA2 and the ejection assembly NA may be provided in a first housing HS1 of the print head (inkjet print head). The first housing HS1 may be a structure connected to the second housing HS2, and a drive circuit (not shown) may be included inside the second housing HS2. The drive circuit BD may control the piezoelectric element layer W1 as described herein.

[0063] The ink of the inkjet print head can be injected into the chambers SPA1 and SPA2 through the ink inlet IL, and discharged from the chambers SPA1 and SPA2 to the outside through the ink outlet OL. In this way, in some cases, the ink can mainly move in the order of ink inlet IL-chambers SPA1 and SPA2-ink outlet OL. That is, for example, the ink can travel through the ink inlet IL, the chambers SPA1 and SPA2, and the ink outlet OL. The ink inlet IL can be communicated with the chambers SPA1 and SPA2 to inject the ink into the chambers SPA1 and SPA2 to pass through the first shell HS1, and the ink outlet OL can be communicated with the chambers SPA1 and SPA2 to discharge the ink from the chambers SPA1 and SPA2 through the first shell HS1. That is, for example, the ink inlet IL, the chambers SPA1 and SPA2, and the ink outlet OL can be fluidically connected to each other. The ink inlet IL and the ink outlet OL can be opened or locked as needed, and the opening and locking can be manually or automatically controlled by the printing system.

[0064] The chambers SPA1 and SPA2 storing the ink may include a first chamber SPA1 connected to the ink inlet IL and the ink outlet OL, and a second chamber SPA2 separated from the first chamber SPA1 by a mesh layer Msh.

[0065] The ink may be filtered by the mesh layer Msh while moving from the first chamber SPA1 to the second chamber SPA2. The ink moved to the second chamber SPA2 may be filtered, and impurities may be removed from the ink. The ink may be discharged out of the jetting assembly NA through the ink transfer channel NZ of the jetting assembly NA.

[0066] The jetting assembly NA may discharge ink to the outside through the bottom surface BTL. The jetting assembly NA may include an ink transmission channel NZ passing through the bottom surface BTL of the jetting assembly NA. The ink transmission channel NZ may be a nozzle controllable by the printing system in association with discharging an appropriate amount of ink (e.g., an amount of ink suitable for a printing operation and / or a component measurement operation described herein) to the outside.

[0067] That is, for example, the jetting assembly NA may include an ink transfer channel NZ disposed below the chambers SPA1 and SPA2 and connected to the insides of the chambers SPA1 and SPA2. The jetting assembly NA may discharge ink passing through the ink transfer channel NZ to the outside through the bottom surface BTL.

[0068] The injection assembly NA may include a piezoelectric element layer W1 and a nozzle plate W2 disposed below the piezoelectric element layer W1. The piezoelectric element layer W1 may include a piezoelectric material, such as lead zirconate titanate (PZT) as an example. The piezoelectric element layer W1 may be controlled according to an electrical signal sent from a drive circuit, and may include a piezoelectric actuator configuration. In some embodiments, the piezoelectric actuator configuration may be a known piezoelectric actuator configuration. Additionally or alternatively, the piezoelectric actuator configuration may be different from a known piezoelectric actuator configuration.

[0069] The nozzle plate W2 may include an organic material such as polyamide (PI) as an example, or a metal material such as stainless steel (SUS), iron (Fe), chromium (Cr), nickel (Ni) as an example.

[0070] The jetting assembly NA may include an ink transmission channel NZ formed to pass through the piezoelectric element layer W1 and the nozzle plate W2. The ink transmission channel NZ may have a bottleneck structure. Therefore, the ink discharged through the ink transmission channel NZ may have a higher hydraulic pressure through the bottleneck structure. That is, for example, the ink may have a higher hydraulic pressure due to passing through the bottleneck structure.

[0071] Hereinafter, aspects of a system for measuring components of an ink droplet according to one or more embodiments will be described in detail based on the above description.

[0072] Figure 3 is a schematic conceptual diagram of a system for measuring components of an ink droplet according to one or more embodiments. Figure 4 It is shown Figure 3 Schematic cross-sectional view of a device for measuring the composition of an ink droplet.

[0073] like Figure 3 and Figure 4 As shown in FIG. 1 , a system for measuring components of an ink droplet TG according to one or more embodiments (hereinafter, the system) may include a component measuring device 100 capable of measuring components of the ink droplet TG and a computing device 200 .

[0074] The system can be implemented to measure the presence of substrate 300 ( Figure 4 , which also applies hereinafter). For example, in association with measuring the composition of the plurality of ink droplets TG (or a part of the plurality of ink droplets TG), the plurality of ink droplets TG present on the substrate 300 have been discharged (pre-discharged) by the system onto the substrate 300. The plurality of ink droplets TG may be discharged from a nozzle provided in the inkjet print head according to a preset volume.

[0075] The component measuring device 100 capable of measuring the components of an ink droplet may include a camera device 110, a mass spectrometer measuring device 120, a laser emitting device 130 (also referred to herein as a laser irradiation device), a particle suction component 140 (also referred to herein as a particle suction part) and a gas injection device 150.

[0076] The camera device 110 may be positioned so that the camera device 110 faces the substrate 300 or the plurality of ink droplets TG. The camera device 110 may be disposed above the substrate 300 so that the camera device 110 is spaced apart from the substrate 300 or the plurality of ink droplets TG. The camera device 110 may generate image data including all or a portion of the plurality of ink droplets TG. In some aspects, the image data may be data of an optical image. For example, in association with generating the image data, the camera device 110 may include at least one optical lens (not shown) and a driver (not shown) capable of driving the at least one optical lens (not shown). Reference to the camera device 110 generating the image data may include similar reference to the camera device 110 acquiring the image data.

[0077] However, in some cases, the camera device 110 using an optical lens (not shown) may have a vignetting phenomenon. According to the vignetting phenomenon, the image data obtained by the camera device 110 may be distorted. Therefore, in some cases, the grayscale obtained from the image data obtained by the camera device 110 may also be distorted according to the vignetting phenomenon. Aspects of the present disclosure support a technology for correcting image distortion caused by the vignetting phenomenon.

[0078] The range in which the vignetting phenomenon occurs may vary according to the aperture, size, refractive index, etc. of the optical lens (not shown) provided in the camera device 110. Since the range in which the vignetting phenomenon occurs may vary according to the aperture, size, refractive index, etc. of the optical lens (not shown), the range in which the vignetting phenomenon occurs may have periodicity according to the aperture, size, refractive index, etc. of the optical lens (not shown). Therefore, for example, when offset data is generated according to the characteristics of concentration information measured in ink droplets within a range having periodicity, the generated offset data may be applied to concentration information measured in ink droplets within different ranges based on the periodicity. The generated offset data is data obtained from ink droplets within a range, and the technology described herein includes applying the generated offset data to ink droplets within different ranges based on the periodicity. In some aspects, the application of the generated offset data according to one or more embodiments of the present disclosure may correct or mitigate the distortion caused by the vignetting phenomenon.

[0079] For example, the printing system may pre-discharge a plurality of ink droplets TG onto the substrate 300. The plurality of ink droplets TG discharged onto (and present on) the substrate 300 may be referred to as "pre-discharged" or "pre-ejected" ink droplets TG onto the substrate 300. In an example, the camera device 110 may generate first image data including a first ink droplet within a first target range among the plurality of ink droplets TG discharged onto the substrate 300.

[0080] For example, the camera device 110 may generate second image data including a second ink droplet within a second target range among the plurality of ink droplets TG discharged onto the substrate 300 .

[0081] In an example, the printing system may select a first target range. The first target range may be a range selected according to a preset reference among the plurality of ink droplets TG. The first ink droplet may be an ink droplet disposed in an area selected according to a preset reference among the plurality of ink droplets TG. For example, the first target range may be defined or selected by a period (e.g., duration) during which the vignetting phenomenon occurs.

[0082] In an example, the printing system may obtain a second target range. The second target range may be a range obtained by excluding the first target range from the plurality of ink droplets TG. Additionally or alternatively, the second target range may be a portion of a range obtained by excluding the first target range. For example, the second target range may be a range defined or selected by the aforementioned period (e.g., duration) among ink droplets obtained by excluding the first target range from the plurality of ink droplets TG.

[0083] The mass spectrometer 120 may be a device for measuring the mass spectrum of each of the ink droplets as a target. The mass spectrum may be the mass spectrum of the ion particles (hereinafter, particles) caused by each of the first ink droplets within the first target range being ionized by the laser beam. The mass spectrometer 120 may apply an electric field or a magnetic field to the ion particles, and divide the ion particles for each mass-to-charge ratio value (m / z) to detect the mass spectrum. For example, the mass spectrometer 120 may apply an electric field or a magnetic field to the ion particles, and determine the mass-to-charge ratio value (m / z) for each of the ion particles. The mass spectrometer 120 may calculate the mass spectrum based on the respective mass-to-charge ratio values ​​(m / z) of the ion particles.

[0084] The mass spectrometer 120 may include a suction tube configured to collect particles extracted by the particle suction assembly 140 as described herein. In the specification, for ease of description, the description of the suction tube and the illustration of the mass spectrometer 120 are embodied, and for the sake of brevity, the description of other components of the mass spectrometer 120 is omitted. As described herein, the mass spectrometer 120 or the suction tube of the mass spectrometer 120 may be arranged above the particle suction assembly 140 at a certain distance. Additionally or optionally, the mass spectrometer 120 or the suction tube may be arranged above the substrate 300 or a plurality of ink droplets TG and spaced a certain distance from the substrate 300. The suction tube may be a tube having a non-stick property (e.g., such as, for example, a low friction coefficient). In the example, the suction tube may be a PFA tube, may not be sticky, and may be adjusted in length depending on the situation.

[0085] The laser emitting device 130 may be a device configured to emit a laser beam toward each of the first ink droplets within the first target range. For example, the laser emitting device 130 may irradiate each of the first ink droplets with a laser beam. For example, the laser emitting device 130 may irradiate each of the first ink droplets sequentially (or in parallel) with a laser beam. For example, the laser emitting device 130 may include a laser generator configured to generate a laser beam and a laser guide GD configured to guide the generated laser beam to a desired point (e.g., an ink droplet).

[0086] The particle suction assembly 140 may refer to a structure for extracting particles (eg, ion particles described herein) generated from each of the first ink droplets. The particle suction assembly 140 may refer to a structure for extracting particles generated from each of the second ink droplets.

[0087] The particle suction assembly 140 may be arranged so that the particle suction assembly 140 is spaced a certain distance from the substrate 300. The particle suction assembly 140 may extract particles generated from each of the first ink droplets (or each of the second ink droplets) using the Coanda effect. In an example supporting the generation of the Coanda effect, the inner surface of the particle suction assembly 140 may have a Coanda surface 140a protruding inwardly. In an example where the inert gases AF1 and AF2 are injected along the Coanda surface 140a, particles generated from the target ink may move along the Coanda surface 140a in association with the Coanda effect.

[0088] The gas injection device 150 may be a device configured to inject the inert gases AF1 and AF2 along the Coanda surface 140a. The gas injection device 150 may be a component configured to extract particles through the particle suction assembly 140 by gas injection to provide power. The gas injection device 150 may inject the inert gases AF1 and AF2 into the particle suction assembly 140 from the outside. For example, the gas injection device 150 may inject the inert gases AF1 and AF2 into the particle suction assembly 140 so that the inert gases AF1 and AF2 move along the Coanda surface 140a.

[0089] The inert gases AF1 and AF2 may include elements that do not react with the plurality of ink droplets TG discharged to (and present on) the substrate 300. For example, the inert gases AF1 and AF2 may include elements such as helium (He) and argon (Ar) as examples. According to one or more embodiments of the present disclosure, in order to maximize the Coanda effect using helium and argon, the gas injection device 150 may be configured to inject each of helium and argon at an injection speed of about 0.5 L / min to about 1.5 L / min (specifically, 1 L / min). Specifically, the use of helium and argon can improve the efficiency for forming micro-sized particles, and the Coanda effect can be increased.

[0090] Thus, by extracting or pumping particles using the Coanda effect, the techniques described herein support effective measurement (e.g., reduced complexity, relatively easy measurement) of the concentration of a target material of an ink droplet, even within a factory where a printing process is performed. In an example where particles are extracted using inert gases AF1 and AF2 according to the Coanda effect, contamination or defects in the process (e.g., ink or printing device) may not occur even if or as described herein the particles are extracted or pumped.

[0091] The terms "about" or "approximately" as used herein include the stated value and include a suitable deviation range for the particular value as determined by one of ordinary skill in the art, taking into account the measurement in question and the errors associated with the measurement of a particular quantity. For example, the term "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, or ±5% of the stated value.

[0092] The system may further include a driving stage 320 (refer to FIG. 1 ) configured to move the substrate 300 in association with changing a target irradiated with the laser beam. Figure 1). That is, for example, the drive stage 320 can move the substrate 300 in association with changing the target to be irradiated with the laser beam. The component measuring device 100 of the system capable of measuring the components of the ink droplets can also include a volume measuring device (not shown) for measuring the volume of each of the first ink droplets (or each of the second ink droplets). The volume measuring device (not shown) can generate side image data of the ink droplet from the side of the ink droplet. The side image data may include width information and height information of the ink droplet, and the volume information of the ink droplet can be derived based on the width information and the height information. The volume information can be derived by the computing device 200 as described herein.

[0093] The computing device 200 may include a processor 210, a memory 220, and a communication module 230. The computing device 200 may receive a user input from a user, and execute a preset instruction or an operable operation based on the received user input.

[0094] The processor 210 may execute one or more instructions stored in the memory 220 to control other components (eg, other components of the component measurement device 100 ). The processor 210 may execute one or more instructions stored in the memory 220 .

[0095] The processor 210 is configured to perform operations and control other devices. Mainly, the processor 210 may refer to a central computing device (CPU), an application processor (AP), or a graphics processing device (GPU), etc. The CPU, AP, or GPU may include one or more cores therein, and the CPU, AP, or GPU may operate using an operating voltage and a clock signal. However, the CPU or AP may include several cores optimized for serial processing, while the GPU may include thousands of small and efficient cores designed for parallel processing.

[0096] The processor 210 can provide or process appropriate information or functions (e.g., information or functions related to the component measurement device 100 and / or printing device) to the user by processing input or output signals, data and information, etc. through the above components or driving applications stored in the memory 220.

[0097] The memory 220 stores data that supports various functions of the computing device 200. The memory 220 may store a plurality of applications (or applications) driven by the computing device 200, data for the operation of the computing device 200, and instructions. At least some of the applications may be downloaded from an external server via wireless communication. The application may be stored in the memory 220, installed in the computing device 200, and driven by the processor 210 to perform the operation (or function) of the computing device 200.

[0098] The memory 220 may include at least one type of storage medium among a flash memory, a hard disk memory, a solid state drive (SSD) memory, a silicon disk drive (SDD) memory, a multimedia card micro memory, a card memory (e.g., an SD or XD memory), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and an optical disk. The memory 220 may include a network storage configured to perform a storage function on the Internet.

[0099] The communication module 230 can perform a wired communication function. Optionally, the communication module 230 sends and receives information between a base station and a camera with a communication function through an antenna. The communication module 230 may include a modulator, a demodulator, and a signal processor. According to one or more embodiments of the present disclosure, wireless communication may be communication using a wireless communication network using communication facilities pre-installed by a telecommunications company and the frequency of the communication facilities, or may be short-range communication, such as Bluetooth, Bluetooth Low Energy (BLE), beacons, radio frequency identification (RFID), near field communication (NFC), infrared communication technology (IrDA), ultra-wideband (UWB), and wireless domain network as examples.

[0100] According to one or more embodiments, the computing device 200 may receive the first image data or the second image data obtained from the camera device 110. The computing device 200 may obtain first grayscale information for each of the first ink droplets included in the first image data based on the received first image data. The computing device 200 may obtain second grayscale information for each of the second ink droplets included in the second image data based on the received second image data.

[0101] For example, the first image data obtained from the camera device 110 may include a first ink droplet within a first target range among the plurality of ink droplets TG discharged onto (and present on) the substrate 300. The second image data obtained from the camera device 110 may include a second ink droplet within a second target range among the plurality of ink droplets TG discharged onto (and present on) the substrate 300.

[0102] For example, to obtain the first grayscale information, the computing device 200 may generate a preparation instruction for the print head, generate a control instruction for discharging a plurality of ink droplets TG onto the substrate 300, and obtain first image data about the first ink droplet. In an example, the computing device 200 may provide the preparation instruction and the control instruction to the printing system (e.g., to the print head). The computing device 200 may obtain the first grayscale information of each of the first ink droplets based on the first image data.

[0103] For example, the first grayscale information can be obtained through the following operation.

[0104] (1) Cropping an area including each of the first ink droplets to obtain first grayscale information of each of the first ink droplets from first image data including the first ink droplets. For example, the operation may include cropping an area including the first ink droplets from the first image data including the first ink droplets, and generating a cropped image based on the cropping.

[0105] (2) Perform preprocessing on the cropped image.

[0106] (3) A region of interest (ROI) including each of the first ink droplets is extracted after performing preprocessing.

[0107] (4) The first grayscale information is calculated by measuring the histogram of the ROI used for extraction.

[0108] For example, the computing device 200 may obtain first concentration information of the target material contained in each of the first ink droplets based on the first grayscale information. According to one or more embodiments of the present disclosure, the first concentration information may be obtained through the following operations.

[0109] (1) Obtain first grayscale information.

[0110] (2) First concentration information of a target material contained in each of the first ink droplets is obtained based on a concentration-grayscale information curve prepared in advance.

[0111] (3) (using a volume measuring device (not shown)) obtain volume information of each of the first ink droplets, and quantify the first concentration information based on the volume information (for example, obtain concentration information per unit volume based on the volume values ​​of some of the above ink droplets or standardize the concentration information per unit volume).

[0112] For example, the computing device 200 may receive, from the mass spectrometry device 120 , a mass spectrum of particles generated from each of the first ink droplets.

[0113] For example, the computing device 200 may obtain second concentration information of the target material contained in each of the first ink droplets based on the received mass spectrum.

[0114] According to one or more embodiments of the present disclosure, the second concentration information may be obtained through the following operations.

[0115] (1) Obtain a mass spectrum of particles generated from each of the first ink droplets.

[0116] (2) The second concentration information of each of the first ink droplets is obtained based on the concentration-mass spectrum curve prepared in advance.

[0117] (3) (using a volume measuring device (not shown)) obtain volume information of each of the first ink droplets, and quantify the second concentration information based on the volume information (for example, obtain the concentration information per unit volume based on the volume value of the above-mentioned first ink droplets or standardize the concentration information per unit volume).

[0118] For example, the computing device 200 may obtain the offset data based on the first density information and the second density information. According to one or more embodiments of the present disclosure, the offset data may be obtained through the following operations.

[0119] (1) Calculate the difference between the first density information obtained based on the first grayscale information and the second density information obtained based on the mass spectrum.

[0120] (2) Obtaining offset data for correcting the first grayscale information based on the calculated difference value.

[0121] According to one or more embodiments of the present disclosure, as described above, the offset data may be data for correcting distortion of the first density information caused by the vignetting effect.

[0122] For example, the first concentration information can be obtained using the camera device 110, and the concentration measurement method using the camera device 110 can quickly measure the concentration. However, according to the vignetting effect, distortion may occur in the measured concentration. However, the second concentration information is the concentration measured using a mass spectrometer according to one or more embodiments of the present disclosure as described herein, and the concentration measurement method using a mass spectrometer may have a relatively low concentration measurement rate, but may not have a vignetting effect. That is, for example, the concentration measurement method using a mass spectrometer can measure the concentration more accurately than the concentration measurement method using the camera device 110.

[0123] Therefore, the system may apply a concentration measurement method using a mass spectrometer to each of the first ink droplets within the first target range and obtain second concentration information. The concentration measurement method using a mass spectrometer has a low concentration measurement rate, and the technology described herein may correct distortion according to the vignetting effect by first obtaining offset data, applying the concentration measurement method using the camera device 110 to each of the second ink droplets within the second target range, and applying the offset data to the second grayscale information associated with each of the second ink droplets within the second target range. As such, the technology described herein includes using the obtained offset data to correct grayscale information associated with a third ink droplet within a third target range, a fourth ink droplet within a fourth target range, an nth ink droplet within an nth target range, and the like, wherein the grayscale information to be corrected is obtained by applying the concentration measurement method using the camera device 110 to the third ink droplet within the third target range, the fourth ink droplet within the fourth target range, and the nth ink droplet within the nth target range, and the like.

[0124] For example, the computing device 200 can obtain second grayscale information for each of the second ink droplets within a second target range among multiple ink droplets TG, apply previously obtained offset data to the second grayscale information, and obtain third concentration information (corrected concentration information) based on the second grayscale information and the offset data.

[0125] According to one or more embodiments of the present disclosure, the second grayscale information may be obtained through the following operations.

[0126] (1) Cropping an area including each of the second ink droplets to obtain second grayscale information of each of the second ink droplets from second image data including the second ink droplets. For example, the operation may include cropping an area including the second ink droplets from the second image data including the second ink droplets, and generating a cropped image based on the cropping.

[0127] (2) Perform preprocessing on the cropped image.

[0128] (3) Extracting a ROI including each of the second ink droplets after performing preprocessing.

[0129] (4) Calculate the second grayscale information by measuring the histogram of the extracted ROI.

[0130] According to one or more embodiments of the present disclosure, the third concentration information may be obtained through the following operations.

[0131] (1) The second grayscale information is corrected based on the offset data.

[0132] (2) The third density information is obtained from the corrected second grayscale information based on a density-grayscale information curve prepared in advance.

[0133] For example, the computing device 200 may generate printing order information based on the third density information. The printing order information may be information about an order in which a printing process is performed according to a predefined pattern.

[0134] For example, when the obtained third concentration information (e.g., concentration value) is less than a preset concentration value, the printing sequence information may be information about a printing sequence to which the third concentration information is applied. For example, when the third concentration information is less than the preset concentration value, the computing device 200 may generate printing sequence information to further perform a printing process on the corresponding pixel. For example, when the third concentration information is less than the preset concentration value, the computing device 200 may generate printing sequence information to increase the discharge amount of ink of the nozzle corresponding to the third concentration information. The printing sequence information in this specification may be or include a driving algorithm for driving a printing device or an inkjet print head.

[0135] The computing device 200 may generate a control instruction for performing a printing process based on the printing sequence information, and send the control instruction to a printing device or an inkjet print head.

[0136] For example, the aforementioned target material contained in the ink droplet may include titanium dioxide (TiO 2 The luminous efficiency of a quantum dot (QD) display device can be determined based on the TiO 2 Therefore, in some cases, when TiO 2 When the concentration of TiO2 is different for each pixel, defects may occur, such as, for example, stains in a QD display device. Embodiments of the present disclosure support effective analysis of TiO2 in ink droplets in the manufacturing process of a QD display device. 2 concentration information.

[0137] like Figure 4 As shown in , the laser emitting device 130 of the system can generate a laser beam. The laser emitting device 130 may include a laser guide GD configured to guide the laser beam to accurately irradiate each of the first ink droplets (or each of the second ink droplets), and may include a plurality of reflective lenses RL1, RL2, and RL3. The laser guide GD may include a polarizing film, a convex lens, and a concave lens, and the laser guide GD may guide the generated laser beam toward the reflective lens. The plurality of reflective lenses RL1, RL2, and RL3 may refract the laser beam toward each of the first ink droplets (or each of the second ink droplets) to a desired position.

[0138] In order to block the path through which the laser beam passes through by irradiating external light, the ink drop component measuring device 100 of the system (refer to Figure 3 ) may further include a laser guide GD and a housing Hs including a plurality of reflective lenses RL1, RL2, and RL3 therein. For example, the interior of the housing Hs may be a dark area or a dark closed space. The aforementioned camera device 110 may also be provided inside the housing Hs.

[0139] The upper surface of the particle suction assembly 140 may include a transparent material. For example, the upper surface of the particle suction assembly 140 or at least a portion of the upper surface may include a quartz unit Qz including quartz.

[0140] One surface of the housing HS that contacts the upper surface of the particle suction assembly 140 may include a transparent material or may be open (e.g., the surface of the housing HS may include a hole). In an example where the surface of the housing HS is open (e.g., includes a through hole), the quartz unit Qz of the particle suction assembly 140 may be installed in the through hole on the surface of the housing HS.

[0141] The laser beam generated by the laser emitting device 130 may irradiate the target ink through the quartz unit Qz. For example, the generated laser beam may travel through the quartz unit Qz and propagate toward the target ink so that the laser beam irradiates the target ink. The camera device 110 may obtain image data for each of the first ink droplets (or each of the second ink droplets) through the quartz unit Qz. To this end, the quartz unit Qz may be disposed above the substrate 300 or the plurality of ink droplets TG so as to be spaced a certain distance from the substrate 300 or the plurality of ink droplets TG.

[0142] The white light illumination device 112 may be a device configured to generate white light for generating the first image data (or the second image data) of the camera device 110. The white light illumination device 112 may generate white light of predefined specifications to obtain accurate grayscale information and obtain concentration information of the target material, and may illuminate the aforementioned quartz unit Qz with the white light. For example, the white light illumination device 112 may generate white light, and the white light may be incident on the quartz unit Qz.

[0143] Figure 5 It is shown Figure 4 Schematic cross-sectional view of portion A of .

[0144] For reference, in Figure 5 In the description of Figure 1 and Figure 2 Identical or redundant descriptions.

[0145] like Figure 5 As shown in FIG. , the gas injection device 150 (refer to Figure 4 ) can achieve a better performance than the particle suction assembly 140 (reference Figure 4 ) to increase the pressure inside the particle suction assembly 140 to inject inert gases AF1 and AF2 (reference Figure 4 ). That is, for example, the gas injection device 150 may inject the inert gases AF1 and AF2 at a pressure higher than the pressure inside the particle suction assembly 140 .

[0146] The side wall of the particle suction assembly 140 may include an inlet In through which the inert gases AF1 and AF2 are injected and an outlet Ot from which the inert gases AF1 and AF2 are discharged. The inlet In and the outlet Ot may be formed through the side wall of the particle suction assembly 140. For example, the inlet 140c may be the inlet In through which the inert gases AF1 and AF2 are injected into a through hole formed through the side wall of the particle suction assembly 140, and the outlet may be the outlet Ot from which the inert gases AF1 and AF2 are discharged.

[0147] The cross-sectional area of ​​the inlet In may be greater than the cross-sectional area of ​​the outlet Ot. According to the Bernoulli principle, as the cross-sectional area of ​​the outlet Ot decreases, the flow rate of the inert gases AF1 and AF2 discharged through the outlet Ot may increase.

[0148] For example, the outlet Ot may guide the inert gases AF1 and AF2 so that the inert gases AF1 and AF2 are discharged along the Coanda surface 140a. For example, the particle suction assembly 140 may include a guide 140b disposed between the inlet In and the outlet Ot.

[0149] like Figure 5 As shown in , one end 140b1 of the guide member 140b may be disposed around the inlet In, and the other end 140b2 of the guide member 140b may be disposed around the outlet Ot. The one end 140b1 of the guide member 140b may have a shape that supports controlling the flow of the inert gases AF1 and AF2 from the inlet In to the outlet Ot. The other end 140b2 of the guide member 140b may have a shape that supports the movement of the inert gases AF1 and AF2 from the outlet Ot along the guide member 140b.

[0150] For example, one end 140b1 of the guide 140b may have a convex surface that protrudes toward a region through which the inert gases AF1 and AF2 pass. An opposite surface positioned in an opposite direction to the convex surface may be a flat plane.

[0151] For example, the other end 140b2 of the guide member 140b may protrude so that the other end 140b2 passes through the outlet Ot. For example, the other end 140b2 of the guide member 140b may be curved, and the curve of the other end 140b2 may be approximately parallel to the curved direction of the Coanda surface 140a. For example, the other end 140b2 of the guide member 140b may be curved to have a curve from the outlet Ot toward the upper side of the particle suction assembly 140.

[0152] For example, the inlet 140c of the particle suction assembly 140 may include an inclined inner surface having a cross-section that narrows in a direction away from the substrate 300. For example, the inclined inner surface of the inlet 140c of the particle suction assembly 140 may be based on the substrate 300 (refer to Figure 4 ) extends in a direction having an inclination angle α that is acute to the substrate 300.

[0153] Hereinafter, a method of measuring components of an ink droplet according to another embodiment will be described in detail based on the above description.

[0154] For reference, the main body of the method for measuring the composition of ink droplets (hereinafter, the measuring method) may be the concentration measurement system of the ink material described herein, the computing device 200 described herein (refer to Figure 3) or the processor 210 described herein of the computing device 200 (reference Figure 3 ).

[0155] Figure 6 is a schematic flow chart of a method of measuring composition of an ink droplet according to one or more embodiments.

[0156] For reference, in Figure 6 In the description of the method described herein, the operations may be performed in a different order than that shown and / or described, or the operations may be performed in a different order or at a different time. Certain operations may also be omitted from the flowchart, one or more operations may be repeated, or other operations may be added.

[0157] like Figure 6 As shown in FIG. , the measurement method may include obtaining a plurality of ink droplets TG (reference Figure 4 ) in the first target range (S110).

[0158] The operation S110 of obtaining the first grayscale information may include receiving the first grayscale information from the camera device 110 (refer to Figure 3 ) and obtains first grayscale information for each of the first ink droplets included in the first image data based on the received first image data. The first image data may be data including an image of a first ink droplet within a first target range among a plurality of ink droplets TG.

[0159] For example, in operation S110 of obtaining the first grayscale information, in order to obtain the first grayscale information, the measuring method may include generating a preparation instruction for the print head, generating a control instruction for discharging the plurality of ink droplets TG on the substrate 300, and obtaining first image data including first ink droplets within the first target range among the plurality of ink droplets TG. In operation S110 of obtaining the first grayscale information, first grayscale information for each of the first ink droplets may be obtained based on the first image data.

[0160] For example, operation S110 of obtaining the first grayscale information may include the following operations.

[0161] (1) Cropping a region including each of the first ink droplets to obtain first grayscale information from first image data including the first ink droplets. A cropped image is generated based on the cropping.

[0162] (2) Perform preprocessing on the cropped image.

[0163] (3) A ROI including each of the first ink droplets is extracted after performing preprocessing.

[0164] (4) Calculate the grayscale information by measuring the histogram of the extracted ROI.

[0165] The measuring method may further include obtaining first concentration information of a target material contained in each of the first ink droplets based on the first grayscale information (S120). The operation of obtaining the first concentration information may include the following operations.

[0166] (1) Obtain first grayscale information.

[0167] (2) First concentration information of a target material contained in each of the first ink droplets is obtained based on a concentration-grayscale information curve prepared in advance.

[0168] (3) Obtaining volume information of each of the first ink droplets and quantifying the first concentration information based on the volume information (eg, obtaining concentration information per unit volume based on the volume values ​​of the above ink droplets or normalizing the concentration information per unit volume).

[0169] The measuring method may further include obtaining a mass spectrum for each of the first ink droplets ( S130 ).

[0170] In operation S130 of obtaining a mass spectrum, the mass spectrum measuring device 120 (refer to Figure 3 ) receives a mass spectrum of particles generated from each of the first ink droplets.

[0171] The measuring method may further include obtaining second concentration information of the target material contained in each of the first ink droplets based on the mass spectrum (S140). The operation S140 of obtaining the second concentration information may include the following operations.

[0172] (1) Obtain a mass spectrum of particles generated from each of the first ink droplets.

[0173] (2) The second concentration information of each of the first ink droplets is obtained based on the concentration-mass spectrum curve prepared in advance.

[0174] (3) Obtaining volume information of each of the first ink droplets and quantifying the second concentration information based on the volume information (eg, obtaining concentration information per unit volume based on the volume value of each of the first ink droplets or normalizing the concentration information per unit volume).

[0175] The measuring method may include obtaining offset data based on the first density information and the second density information (S150). The operation S150 of obtaining the offset data may include the following operations.

[0176] (1) Calculate the difference between the first density information obtained based on the first grayscale information and the second density information obtained based on the mass spectrum.

[0177] (2) Obtaining offset data for correcting grayscale information based on the calculated difference value.

[0178] The measuring method may further include obtaining second grayscale information for each of second ink droplets within a second target range among the plurality of ink droplets TG ( S160 ).

[0179] In operation S160 of obtaining second grayscale information, second image data including second ink droplets within the second target range among the remaining ink droplets from which the first grayscale information is not obtained can be obtained, and second grayscale information of each of the second ink droplets can be obtained based on the obtained second image data.

[0180] For example, operation S610 of obtaining the second grayscale information may include the following operations.

[0181] (1) A region including each of the second ink droplets is cropped to obtain second grayscale information from second image data including the second ink droplets.

[0182] (2) Preprocessing is performed on an image formed by cutting out a region including the second target ink droplet.

[0183] (3) Extracting a ROI including each of the second ink droplets after performing preprocessing.

[0184] (4) Calculate the second gray level information for each of the second ink droplets by measuring the histogram of the extracted ROI.

[0185] The measuring method may further include obtaining third density information of the target material contained in each of the second ink droplets based on the second grayscale information and the offset data (S170). The operation S170 of obtaining the third density information of the target material may include the following operations.

[0186] (1) The obtained offset data is applied to the second grayscale information.

[0187] (2) Third density information (for example, density value) of the target material contained in the second target ink droplet is obtained based on the second grayscale information corrected by applying the offset data and a density-grayscale information curve prepared in advance.

[0188] The measuring method may further include generating printing sequence information based on the third density information (S180). In this case, the printing sequence information may be information on an order in which a printing process is performed according to a predefined pattern.

[0189] For example, when the obtained third density information (e.g., density value) is less than a preset density value, the printing order information may be information about a printing order to which the third density information is applied. For example, when the third density information is less than the preset density value, the operation S180 of generating the printing order information may include generating the printing order information to further perform a printing process on the corresponding pixel.

[0190] For example, when the third density information (e.g., density value) is less than the preset density value, the operation S180 of generating the printing sequence information may include generating the printing sequence information to increase the discharge amount of the ink of the nozzle corresponding to the third density information. The printing sequence information in the specification may be or include a driving algorithm for driving the printing device or the inkjet print head.

[0191] The measuring method may further include generating a control instruction for executing a printing process based on the printing sequence information (S190). In an example, the control instruction may be an instruction for controlling a printing device or an inkjet print head to execute a printing operation based on the printing sequence information.

[0192] Operation S190 of generating a control instruction may include generating a control instruction for performing a printing process based on the printing sequence information, and transmitting the control instruction to a printing device or an inkjet print head.

[0193] According to one or more embodiments as described above, a system for measuring components of ink droplets and a method for measuring components of ink droplets for a more accurate fine inkjet printing process may be implemented. This effect is not limited to the scope of the present disclosure.

[0194] Thus, the present disclosure has been described with reference to the embodiments shown in the accompanying drawings, but the embodiments are examples, and those skilled in the art will appreciate that various modifications and other equivalent embodiments are possible according to the embodiments. Therefore, the true technical scope of the present disclosure should be determined by the technical spirit of the appended claims.

[0195] It should be understood that the embodiments described herein should be considered in a descriptive sense rather than for limiting purposes. The description of features or aspects in each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made in the embodiments without departing from the spirit and scope defined by the appended claims.

Claims

1. A system for measuring the composition of an ink droplet, wherein: The system comprises: a camera device configured to generate first image data including a plurality of first ink droplets within a first target range among the plurality of ink droplets discharged onto and present on a substrate; a laser irradiation device configured to generate a plurality of particles by irradiating each of the plurality of first ink droplets with a laser beam; a particle suction assembly spaced a distance from the substrate and comprising an inner surface, wherein the inner surface is a Coanda surface and is convex inwardly; a gas injection device configured to inject an inert gas into the particle suction assembly to move the inert gas along the Coanda surface; and A mass spectrometry device is configured to measure a mass spectrum of the plurality of particles extracted by the inert gas through the particle suction assembly.

2. The system according to claim 1, wherein: The particle suction assembly comprises: an inlet through which the inert gas is injected from outside the particle suction assembly; and An outlet through which the inert gas is discharged from the particle suction assembly.

3. The system according to claim 2, wherein: The particle suction assembly also includes a guide configured to direct the inert gas to be discharged along the Coanda surface.

4. The system according to claim 1, wherein: The system also includes a driving stage configured to move the substrate to change a target irradiated with the laser beam.

5. The system according to claim 1, wherein: The system also includes a computing device configured to obtain first grayscale information for each of the plurality of first ink droplets based on the first image data.

6. The system according to claim 5, wherein: The calculation device is configured to obtain first concentration information of a target material included in each of the plurality of first ink droplets based on the first grayscale information.

7. The system according to claim 6, wherein: The computing device is configured to obtain second concentration information of the target material included in each of the plurality of first ink droplets based on the mass spectrum.

8. The system according to claim 7, wherein: The calculation device is configured to obtain offset data based on the first concentration information and the second concentration information.

9. The system according to claim 8, wherein: The camera device is configured to generate second image data including a plurality of second ink drops within a second target range among the plurality of ink drops.

10. The system according to claim 9, wherein: The computing device is configured to obtain second grayscale information for each of the plurality of second ink droplets based on the second image data.

11. The system according to claim 10, wherein: The calculation device is configured to obtain third concentration information of the target material included in each of the plurality of second ink droplets based on the second grayscale information and the offset data.

12. The system according to claim 11, wherein: The computing device is configured to generate printing sequence information based on the third density information, and to generate a control instruction for executing a printing process based on the printing sequence information.

13. The system according to claim 6, wherein: The target material includes TiO2.

14. A method of measuring the composition of an ink droplet, wherein: The method comprises the following steps: obtaining first gray level information for each of a plurality of first ink droplets within a first target range among a plurality of ink droplets discharged onto and present on a substrate; obtaining first concentration information of a target material included in each of the plurality of first ink droplets based on the first grayscale information; obtaining a mass spectrum for each of the plurality of first ink droplets; obtaining second concentration information of the target material included in each of the plurality of first ink droplets based on the mass spectrum; obtaining offset data based on the first concentration information and the second concentration information; obtaining second grayscale information for each of a plurality of second ink droplets within a second target range among the plurality of ink droplets; and Third concentration information of the target material included in each of the plurality of second ink droplets is obtained based on the second grayscale information and the offset data.

15. The method according to claim 14, wherein: The method further includes generating printing order information based on the third density information.

16. The method according to claim 15, wherein: in, The method further includes generating a control instruction for executing a printing process based on the printing sequence information.

17. The method according to claim 14, wherein: The obtaining of the first grayscale information comprises: generating preparation instructions for the print head; generating control instructions for discharging the plurality of ink droplets onto the substrate; and First image data including the first ink droplet is obtained.

18. The method according to claim 17, wherein: The obtaining the first grayscale information further includes obtaining the first grayscale information for each of the plurality of first ink droplets based on the first image data.

19. The method according to claim 14, wherein: The obtaining the second concentration information of the target material comprises: obtaining the second concentration information of the target material included in each of the plurality of first ink droplets based on a concentration-mass spectrum curve prepared in advance; and Volume information of each of the plurality of first ink droplets is obtained, and the second concentration information is quantified based on the volume information.

20. The method according to claim 14, wherein: The target material includes TiO2.

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