CN108944079B - Ink jet printing apparatus for electroluminescent display device and printing method thereof - Google Patents
Ink jet printing apparatus for electroluminescent display device and printing method thereof Download PDFInfo
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- CN108944079B CN108944079B CN201711424250.8A CN201711424250A CN108944079B CN 108944079 B CN108944079 B CN 108944079B CN 201711424250 A CN201711424250 A CN 201711424250A CN 108944079 B CN108944079 B CN 108944079B
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- 238000007639 printing Methods 0.000 title claims abstract description 124
- 238000007641 inkjet printing Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000758 substrate Substances 0.000 claims abstract description 111
- 239000007921 spray Substances 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 30
- 239000000463 material Substances 0.000 abstract description 13
- 238000001035 drying Methods 0.000 abstract description 5
- 239000000976 ink Substances 0.000 description 66
- 238000000151 deposition Methods 0.000 description 9
- 230000008021 deposition Effects 0.000 description 8
- 239000003086 colorant Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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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
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
- B41J3/543—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements with multiple inkjet print heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/21—Ink jet for multi-colour printing
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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
- B41J25/00—Actions or mechanisms not otherwise provided for
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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
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
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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
- 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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- Electroluminescent Light Sources (AREA)
Abstract
The invention relates to an ink-jet printing device and method of an electroluminescent display device. The supporting table is used for placing a substrate to be subjected to ink-jet printing. The printing spray heads are connected with the ink box, the printing spray heads are arranged on the moving platform at intervals in parallel, and the printing spray heads are provided with a plurality of nozzles arranged in rows. The nozzle faces the support table. The substrate to be subjected to ink-jet printing is placed on the supporting table, and the more than two printing nozzles are connected with the ink box, so that the moving table can move the more than two printing nozzles to synchronously perform ink-jet printing operation on the pixel grooves on the substrate, especially for the substrate with a large size area, the printing efficiency of the luminescent material is higher, and the ink material on the substrate is subjected to drying treatment after being synchronously printed, so that the uniformity and the stability of the substrate are better.
Description
Technical Field
The invention relates to the technical field of ink jet printing, in particular to an ink jet printing device of an electroluminescent display device and a printing method thereof.
Background
Electroluminescent display devices, including OLED or QLED displays, made by ink jet printing have been developed because of their lower cost and lower requirements for equipment. The conventional ink-jet printing apparatus for the electroluminescent display device generally performs the printing operation by using only one ink cartridge and one ink at the same time, and the ink-jet printing operations of different colors of the light-emitting materials of the OLED device or the QLED device are required to be performed sequentially. That is, one of the materials (e.g., red ink) is printed, then dried, the other material (e.g., green ink) is printed, then dried, and finally the printing and drying operations for the remaining color are performed. The whole ink-jet printing process of the electroluminescent display device is long and complicated, the manufacturing efficiency is low, and the uniformity and the stability of the electroluminescent display device are poor.
Disclosure of Invention
Accordingly, it is necessary to overcome the defects of the prior art and provide an inkjet printing apparatus for an electroluminescent display device and a printing method thereof, which can improve the printing efficiency and have better uniformity and stability of the electroluminescent display device.
The technical scheme is as follows: an ink jet printing apparatus of an electroluminescent display device, comprising: the ink-jet printing device comprises a supporting table, a moving table, an ink box and more than two printing nozzles, wherein the supporting table is used for placing a substrate to be subjected to ink-jet printing, the printing nozzles are connected with the ink box, the printing nozzles are arranged on the moving table at intervals in parallel, the printing nozzles are provided with a plurality of nozzles arranged in rows, and the nozzles face the supporting table.
An ink jet printing method of an electroluminescent display device, an ink jet device adopting the electroluminescent display device, comprising the following steps:
placing a substrate to be subjected to ink-jet printing operation on a support table;
aligning more than two nozzles of the printing nozzle with more than two pixel grooves on the substrate respectively;
and controlling more than two printing nozzles to synchronously carry out ink jet printing operation on the pixel grooves of the substrate along the arrangement direction of the pixel grooves in the longitudinal columns of the substrate.
The substrate to be subjected to ink-jet printing is placed on the supporting table, and the more than two printing nozzles are connected with the ink box, so that the moving table can move the more than two printing nozzles to synchronously perform ink-jet printing operation on the pixel grooves on the substrate, especially for the substrate with a large size area, the printing efficiency of the luminescent material is higher, and the ink material on the substrate is subjected to drying treatment after being synchronously printed, so that the uniformity and the stability of the substrate are better.
Furthermore, the inkjet printing device of the electroluminescent display device further comprises a control module, and the control module is used for controlling the nozzle to perform inkjet printing operation on the pixel slot of the substrate.
Furthermore, the number of the ink boxes is more than two, and the ink boxes and the printing nozzles are arranged in a one-to-one corresponding mode.
Further, the first rotating mechanism is arranged on the moving table, the first rotating mechanism is electrically connected with the control module, and the first rotating mechanism is used for driving the printing nozzle to rotate relative to the supporting table.
Furthermore, the inkjet printing device of the electroluminescent display device further comprises more than two first rotating mechanisms, and the first rotating mechanisms and the printing nozzles are arranged in a one-to-one corresponding manner.
Furthermore, the inkjet printing device of the electroluminescent display device further comprises a second rotating mechanism, the second rotating mechanism is electrically connected with the control module, and the second rotating mechanism is used for driving the substrate or the support platform to rotate relative to the printing spray head.
Further, the specific method for aligning the two or more nozzles of the printing head with the two or more pixel slots on the substrate respectively is as follows: more than two nozzles of one printing nozzle correspond to more than two first longitudinal pixel grooves on the substrate one by one, more than two nozzles of the other printing nozzle correspond to more than two second longitudinal pixel grooves on the substrate one by one, and the first longitudinal pixel grooves and the second longitudinal pixel grooves are sequentially and alternately arranged.
Further, the specific method for aligning the two or more nozzles of the printing head with the two or more pixel slots on the substrate respectively is as follows: and rotating the printing spray head or rotating the substrate on the supporting table so that more than two nozzles of the printing spray head correspond to more than two longitudinal pixel grooves on the substrate one by one.
Further, the inkjet printing method of the electroluminescent display device further includes the steps of: after printing of some of the pixel slots in the column on the substrate is completed, the moving platform moves the printing nozzle, so that the printing nozzle and other pixel slots in the column which are not subjected to printing operation are subjected to aligned printing operation.
Drawings
Fig. 1 is a schematic structural view of an ink jet printing apparatus for an electroluminescent display device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a state in which a printing head of an inkjet printing apparatus of an electroluminescent display device according to an embodiment of the present invention is aligned with a column of pixel slots of a substrate;
fig. 3 is a schematic diagram illustrating a state where a printing head of the conventional inkjet printing apparatus of the electroluminescent display device is aligned with a column of pixel slots of a substrate.
Reference numerals:
10. support platform, 20, mobile platform, 30, ink box, 40, printing nozzle, 41, nozzle, 50, substrate, 51, pixel groove, 52, first column pixel groove, 53, second column pixel groove, 60, first rotating mechanism, 70, second rotating mechanism, 80 and control module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description of the present invention, it should be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.
In one embodiment, as shown in fig. 1, an inkjet printing apparatus for an electroluminescent display device includes a support table 10, a moving table 20, an ink cartridge 30, and two or more printing heads 40. The support table 10 is used for placing a substrate 50 to be subjected to inkjet printing. The print head 40 is connected to the ink cartridge 30, the print head 40 is disposed on the movable stage 20 in parallel at intervals, and the print head 40 has a plurality of nozzles 41 arranged in a row. The nozzle 41 is directed towards the support table 10.
In the above-mentioned inkjet printing apparatus for the electroluminescent display device, the substrate 50 to be subjected to inkjet printing is placed on the support table 10, and the two or more printing nozzles 40 are connected to the ink cartridge 30, so that the moving stage 20 can move the two or more printing nozzles 40 to synchronously perform inkjet printing operations on the pixel slot 51 on the substrate 50, and especially for the substrate 50 with a large size area, the printing efficiency of the luminescent material is high, and the drying treatment is performed after the ink material on the substrate 50 is synchronously printed, so that the uniformity and stability of the substrate 50 are good.
Furthermore, the inkjet printing apparatus of the electroluminescent display device further includes a control module 80. The control module 80 is used for controlling the nozzles 41 to perform an inkjet printing operation on the pixel slots 51 of the substrate 50. In this way, after the two or more nozzles 41 of the print head 40 are aligned with the pixel slots 51 of the substrate 50, the control module 80 can control the nozzles 41 aligned with the pixel slots 51 to perform the inkjet printing operation, and can prevent the nozzles 41 not aligned with the pixel slots 51 from performing the inkjet printing operation, thereby performing the better inkjet printing operation on the substrate 50.
Specifically, the number of the ink cartridges 30 is two or more, and the ink cartridges 30 and the printing heads 40 are arranged in a one-to-one correspondence. Thus, more than two ink cartridges 30 can be respectively provided with more than two colors of ink materials, so that more than two printing nozzles 40 can synchronously and correspondingly print more than two colors of ink in the pixel slots 51 on the substrate 50, the more than two colors of ink sprayed and printed on the substrate 50 can be synchronously dried, the conventional drying treatment of the ink materials on the substrate 50 is not required, and the uniformity and the stability of the ink materials on the substrate 50 are better.
In one embodiment, the inkjet printing apparatus of the electroluminescent display device further includes a first rotation mechanism 60. The first rotating mechanism 60 is disposed on the moving stage 20, the first rotating mechanism 60 is electrically connected to the control module 80, and the first rotating mechanism 60 is configured to drive the print head 40 to rotate relative to the supporting stage 10. In this way, after the first rotating mechanism 60 rotates the printing head 40, the angle between the printing head 40 and the substrate 50 can be adjusted, so that the nozzles 41 arranged in rows of the printing head 40 can correspond to the pixel grooves 51 on the substrate 50 one by one, respectively, and thus, the good ink jet printing effect of the substrate 50 can be ensured.
Further, the number of the first rotating mechanisms 60 is two or more, and the first rotating mechanisms 60 and the printing heads 40 are arranged in a one-to-one correspondence. Thus, each print head 40 can rotate independently relative to the substrate 50 without affecting each other, thereby ensuring good ink jet printing effect of the substrate 50.
In one embodiment, the inkjet printing apparatus of the electroluminescent display device further includes a second rotating mechanism 70. The second rotating mechanism 70 is electrically connected to the control module 80, and the second rotating mechanism 70 is used for driving the substrate 50 or the supporting platform 10 to rotate relative to the print head 40. Similarly, after the second rotating mechanism 70 rotates the substrate 50, the angle between the print head 40 and the substrate 50 can be adjusted, so that the nozzles 41 of the print head 40 arranged in a row can correspond to the pixel slots 51 of the substrate 50 one by one, respectively, thereby ensuring that the ink jet printing effect of the substrate 50 is good.
Referring to fig. 1 and 2, an inkjet printing method for an electroluminescent display device, which employs an inkjet apparatus for the electroluminescent display device, includes the following steps:
step S100 of placing a substrate 50 to be subjected to an inkjet printing operation on a support table 10;
step S200, aligning two or more nozzles 41 of the print head 40 with two or more pixel slots 51 on the substrate 50, respectively;
step S300, controlling two or more print heads 40 to synchronously perform inkjet printing operations on the pixel slots 51 of the substrate 50 along the arrangement direction of the pixel slots in the column of the substrate 50.
Generally, the pixel slots 51 on the substrate 50 are in a rectangular array, that is, the pixel slots 51 on the substrate 50 can be divided into a plurality of columns of pixel slots, and each column of pixel slots includes a plurality of pixel slots 51. As shown in fig. 2, the Y-axis is the arrangement direction of the pixel slots in the column, and is also the moving direction of the print head 40 in a single printing stroke; the X-axis is the direction perpendicular to the Y-axis in the plane of the substrate 50.
The beneficial effects of the above inkjet printing method for the electroluminescent display device are the same as those of the inkjet printing apparatus for the electroluminescent display device, and are not repeated.
Generally, only one print head 40 is connected to the ink cartridge. In the operating state of the apparatus, only one signal is transmitted to the print head 40 of the printing apparatus, thereby depositing the functional ink material to a specific position according to the pattern information. In a conventional process, when an OLED is manufactured in a printing manner, a patterned Pixel Definition Layer (PDL), also called BANK, is previously manufactured on a substrate of a desired device by a photolithography method to fix ink flow. The PDL divides a substrate into a row of pixel pits which are arranged in a two-dimensional ordered mode, and deposition, drying and film forming of pixel ink are facilitated.
The nozzles are usually arranged in one or more rows with equal spacing. In the printing process, the printing nozzle and the substrate form a certain angle, and printing is carried out along the pixel arrangement. One ink box corresponds to one printing nozzle which is formed by arranging hundreds of nozzles, the substrate information is input into a computer through designed software, and the computer guides each nozzle in the printing nozzle to selectively spray or not spray (0 or 1) according to the substrate pattern information. If the printing head and the direction (x direction) of the pixel arrangement of the substrate form an angle theta, the minimum distance of the pixel repetition in the x direction is a, the distance of one row of nozzles is d, then
m×d×cosθ＝k×a
d is the distance between adjacent nozzles, a is the distance of the smallest repeating unit of the pixel in the x direction, m, k are positive integers, representing multiples, the simplest integers, typically m < k. After the printing is started, the printing head is moved in the pixel arrangement direction (y direction) until the column printing is completed, and the printing of 1 pass is completed. Then the printing nozzle has a step towards the X direction, and then the printing nozzle walks along the Y direction until the column printing is completed, the 2 nd stroke is completed, and then the steps are repeated in sequence until all the pixel grooves of the required ink drops on the substrate are completely deposited. This completes the printing process of the entire substrate. A schematic diagram of the printing process is shown in fig. 3.
After one pass of printing, the (nk +1) th column of pixel slots with the patterned substrate is deposited with the desired ink (n is a natural number, n is 0,1,2 …). Fig. 3 is a schematic diagram of a device manufacturing process by single-jet ink-jet printing, (in the figure, m is 1, and k is 2). It can be seen that the showerhead is in one pass, not all pixel wells of the covered area are deposited, but rather a portion is not deposited for a subsequent pass to replenish the deposition. Even if the angle of the head and the substrate is adjusted so that all pixels covered in one pass are deposited with ink (effective deposition), it is premised on sacrificing the number of passes. In order to increase the effective deposition, the included angle theta between the printing nozzle and the substrate is increased, so that the projection of the effective deposition in the X direction is reduced, and the method for adjusting the angle does not reduce the number of strokes in the printing process and improves the efficiency.
As can be seen from the above, the print head does not deposit ink on all pixels covered by the print head in one pass of the inkjet printing.
In the embodiment, the defects can be greatly overcome by arranging two or more printing nozzles in parallel, and on the premise of not increasing the difficulty of manufacturing precision, pixels which are not deposited with ink in the first printing nozzle are deposited by the second printing nozzle in one stroke through the patterned substrate, so that the printing efficiency is improved.
Generally, assume that the nozzle forms an angle θ with the substrate, let the top of the pixel at the top right corner of the substrate be the origin of coordinates, N be the nozzle number on the nozzle, the printing speed be v, and the printing time be t. The coordinates of each nozzle in a stroke are then:
[(N-1)dcosθ,(N-1)dsinθ+vt](N＝1,2,3…)
positioning so that (N-1) · dcos θ becomes k · a (a is the minimum repetition distance of the X-direction pixels)
This, in turn, by means of a patterned computer, enables ink deposition to be carried out in so-called pixel pits. This does not accomplish that all pixels of the print head coverage area are deposited, as described above.
As can be seen from the foregoing, when the angle θ between the printing head and the substrate, the nozzle pitch d on the printing head, and the pixel between the repeating units a in the X direction satisfy m × d × cos θ ═ k × a, after one printing stroke, the (nk +1) th row of the pixel groove with the patterning of the substrate covered by the printing head is deposited with the required ink (n is a natural number), and the other rows are not deposited with the ink.
Since the influencing factor is mainly the X-coordinate of the nozzle, if there are several nozzles connected in parallel, as many covered pixels as possible are deposited. From the foregoing, in a printing apparatus having only one head, the position coordinates of each nozzle in one stroke are [ (N-1) dcos θ, (N-1) dsin θ + vt ], and the X coordinate of each nozzle in the 1 st head of the plurality of head apparatuses is: (N-1) dcos θ
The X coordinate of each nozzle of the 2 nd printing nozzle is: (N-1) dcos θ + Ia (nozzle number N ≠ 1,2,3 …) (I is an integer, I ≠ 1 and I ≠ nk, N ∈ positive integer)
Therefore, the ink outlet of the ink nozzle of the 2 nd printing nozzle just falls on the non-deposited area row of the 1 st printing nozzle, and more rows of ink deposition are completed in one stroke, so that the total number of printing strokes is reduced. Likewise, a third printing nozzle, a fourth printing nozzle and even more printing nozzles can be added, so that the printing efficiency can be further improved. By introducing a plurality of printing nozzles working simultaneously, all functional layers of the OLED device or the QLED device are prepared by ink-jet printing, so that the printing efficiency can be greatly improved.
More specifically, in the preparation of the RGB light-emitting layer, the red, green and blue RGB ink can be simultaneously deposited at one time by distributing the three different light-emitting inks, namely the red, green and blue RGB ink, into three different ink bins.
The method comprises the following specific steps: if the 1 st nozzle prints red ink, the 2 nd nozzle prints green ink, and the 3 rd nozzle prints blue ink, the X coordinates of the position coordinates are respectively marked as X1, X2, and X3, and in general, the pixel slots of the red, green, and blue inks are adjacent on the substrate. The X coordinates of the three printing nozzles in one stroke are respectively as follows:
X1＝(N-1)dcosθ
X2＝(N-1)dcosθ+a(3n+1)
X3＝(N-1)dcosθ+a(3n+2)
(n＝0,1,2…)
as the nozzle abscissa X of the ink dot of the printing nozzle in the printing process meets the formula: x ═ ka
For X1 red ink, the nozzle discharge of the nozzle of the spray head must satisfy the following conditions:
(N-1)dcosθ＝ka ①
X1＝a(3n+1) (n＝0,1,2…) ②
it can be seen from ① that ink can only be deposited in the 1 st, k +1 st, and 2k +1 st columns …, nk +1 st columns (n is a natural number, n is 0,1,2 …) in one pass, the sum ①②, if k is a multiple of 3, all the nozzles are all discharged and deposited in the area of the desired red ink, if k is not a multiple of 3, all the ik is a multiple of 3 (i is 2,3,4 …), ink is deposited in the nik +1 columns (n is 1,2,3 …), and the nozzles corresponding to the other columns are not discharged under the control of the computer-patterned substrate information.
For green X2, the conditions for the nozzles on the head to deliver ink must be met
(N-1)dcosθ+a(3n+1)＝(k+1)a ③
X2＝a(3n+2) (n＝0,1,2…) ④
Similarly, it can be seen from ③ that ink can be deposited only in the 2 nd column, the k +2 nd column … th column nk +2 nd column (n is a natural number, n is 0,1,2 …) in one printing pass, and in general ③④, if k is a multiple of 3, all nozzles are discharged and deposited in the desired X2 green ink region, and if k is not a multiple of 3, ik is a multiple of 3 (i is 2,3,4 …), ink is deposited in the column nik +2 column (n is 1,2,3 …), and ink has an opportunity to be deposited only in the (3n +2) column.
For X3 blue ink, satisfy
(N-1)dcosθ+a(3n+2)＝(k+2)a ⑤
X3＝a(3n+3) (n＝0,1,2…) ⑥
According to the same formula of ⑤⑥, X3 blue ink can only be deposited in (3n +3) columns.
And the nozzles which are connected in parallel are used for subpackaging red, green and blue ink, and the ink is selected according to the position coordinates, the parameter conditions and the substrate patterning information. The deposition of red, green and blue RGB three-color ink is obtained through one-time printing: the X1 red ink is deposited in column 1,4,7, …, (3n +1), the X2 green ink is deposited in column 2,5,8, …, (3n +2), and the X3 blue ink is deposited in column 3,6,9, …, (3n + 3).
In this embodiment, further, the specific method in step S200 is as follows: the two or more nozzles 41 of one print head 40 correspond to the two or more first vertical rows of pixel slots 52 on the substrate 50 one by one, the two or more nozzles 41 of another print head 40 correspond to the two or more second vertical rows of pixel slots 53 on the substrate 50 one by one, and the first vertical rows of pixel slots 52 and the second vertical rows of pixel slots 53 are alternately arranged in sequence. In this way, the nozzles 41 of the two or more heads correspond to different vertical rows of pixel slots on the substrate 50, so that after the moving stage 20 moves the two or more print heads 40 to print the pixel slots 51 on the substrate 50 synchronously, more pixel slots 51 on the substrate 50 can be printed, and the work efficiency is high.
Further, the specific method of step S200 is: the print head 40 is rotated or the substrate 50 on the support table 10 is rotated so that two or more nozzles 41 of the print head 40 correspond to two or more pixel slots in the substrate 50 in a vertical row one to one. In this way, since the distance between adjacent nozzles 41 on the print head 40 is constant as d, and the distance between two adjacent pixel slots in the column is a, the following formula is satisfied by adjusting the included angle θ between the print head 40 and the X-axis on the substrate 50:
m × d × cos θ is k × a, where m and k are positive integers, and are multiples of the simplest integer, and m < k is usually the case, so that two or more nozzles 41 of the print head 40 correspond to two or more pixel slots in the substrate 50 in a column.
If m > k, some nozzles 41 of the print head 40 correspond to two or more columns of pixel slots on the substrate 50 one-to-one, and another part of nozzles 41 of the print head 40 do not align with the columns of pixel slots on the substrate 50, it is necessary to determine the nozzles 41 on the print head 40 that align with the columns of pixel slots of the substrate 50, then control the nozzles 41 that align with the columns of pixel slots of the substrate 50 to perform the printing operation, and control the nozzles 41 that do not align with the columns of pixel slots of the substrate 50 to stop the printing operation, so as to ensure a better printing effect of the pixel slots 51 on the substrate 50.
Further, step S400 is included after step S300: after printing of some columns of pixel slots (including the first column of pixel slots 52 and the second column of pixel slots 53) on the substrate 50 is completed, the moving stage 20 moves the print head 40, so that the print head 40 performs an aligned printing operation with other columns of pixel slots that are not subjected to the printing operation. In this way, the printing operation for all the pixel slots on the substrate can be completed.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. An ink jet printing apparatus for an electroluminescent display device, comprising: the printing device comprises a supporting table, a moving table, an ink box and more than two printing nozzles, wherein the supporting table is used for placing a substrate to be subjected to ink-jet printing, the printing nozzles are connected with the ink box, the printing nozzles are arranged on the moving table in parallel at intervals, each printing nozzle is provided with a plurality of nozzles arranged in rows, and the nozzles face the supporting table;
the control module is used for controlling the nozzle to perform ink-jet printing operation on the pixel groove of the substrate;
more than two nozzles of the printing nozzle are respectively used for aligning with more than two pixel grooves on the substrate;
the control module is also used for controlling more than two printing nozzles to synchronously carry out ink jet printing operation on the pixel grooves of the substrate along the arrangement direction of the pixel grooves in the longitudinal columns of the substrate.
2. The inkjet printing apparatus of the electroluminescent display device according to claim 1, wherein the number of the ink cartridges is two or more, and the ink cartridges are provided in one-to-one correspondence with the printing heads.
3. The inkjet printing apparatus of an electroluminescent display device according to claim 2, further comprising a first rotating mechanism, the first rotating mechanism being disposed on the moving stage, the first rotating mechanism being electrically connected to the control module, the first rotating mechanism being configured to drive the print head to rotate relative to the supporting stage.
4. The inkjet printing apparatus of the electroluminescent display device according to claim 3, wherein the number of the first rotating mechanisms is two or more, and the first rotating mechanisms are provided in one-to-one correspondence with the printing heads.
5. The inkjet printing apparatus of the electroluminescent display device according to claim 2, further comprising a second rotating mechanism, wherein the second rotating mechanism is electrically connected to the control module, and the second rotating mechanism is configured to drive the substrate or the supporting platform to rotate relative to the print head.
6. An ink-jet printing method of an electroluminescent display device, characterized in that an ink-jet printing apparatus using the electroluminescent display device according to any one of claims 1 to 5 comprises the steps of:
placing a substrate to be subjected to ink-jet printing operation on a support table;
aligning more than two nozzles of the printing nozzle with more than two pixel grooves on the substrate respectively;
and controlling more than two printing nozzles to synchronously carry out ink jet printing operation on the pixel grooves of the substrate along the arrangement direction of the pixel grooves in the longitudinal columns of the substrate.
7. The inkjet printing method of an electroluminescent display device according to claim 6, wherein the specific method for aligning two or more nozzles of the print head with two or more pixel slots on the substrate respectively is as follows:
more than two nozzles of one printing nozzle correspond to more than two first longitudinal pixel grooves on the substrate one by one, more than two nozzles of the other printing nozzle correspond to more than two second longitudinal pixel grooves on the substrate one by one, and the first longitudinal pixel grooves and the second longitudinal pixel grooves are sequentially and alternately arranged.
8. The inkjet printing method of an electroluminescent display device according to claim 7, wherein the specific method for aligning two or more nozzles of the print head with two or more pixel slots on the substrate respectively is as follows:
and rotating the printing spray head or rotating the substrate on the supporting table so that more than two nozzles of the printing spray head correspond to more than two longitudinal pixel grooves on the substrate one by one.
9. The method of ink-jet printing of an electroluminescent display device according to claim 6, further comprising the steps of:
after printing of some of the pixel slots in the column on the substrate is completed, the moving platform moves the printing nozzle, so that the printing nozzle and other pixel slots in the column which are not subjected to printing operation are subjected to aligned printing operation.
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| CN115593111B (en) * | 2022-11-28 | 2023-03-21 | 季华实验室 | Inkjet printing control method, device, and computer-readable storage medium |
| CN119017859B (en) * | 2024-10-31 | 2025-05-27 | 上海睿度光电科技有限公司 | Process and device for preparing DNA enzymatic method |
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| CN2695122Y (en) * | 2002-02-12 | 2005-04-27 | 精工爱普生株式会社 | Film formig device, liquid drop projecting device, display device having colour filter |
| CN101037046A (en) * | 2006-03-15 | 2007-09-19 | 株式会社东芝 | Droplet jetting applicator and method of manufacturing coated body |
| CN106915158A (en) * | 2016-06-01 | 2017-07-04 | 广东聚华印刷显示技术有限公司 | Printing system and method |
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| CN2695122Y (en) * | 2002-02-12 | 2005-04-27 | 精工爱普生株式会社 | Film formig device, liquid drop projecting device, display device having colour filter |
| CN101037046A (en) * | 2006-03-15 | 2007-09-19 | 株式会社东芝 | Droplet jetting applicator and method of manufacturing coated body |
| CN106915158A (en) * | 2016-06-01 | 2017-07-04 | 广东聚华印刷显示技术有限公司 | Printing system and method |
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