CN109910437B - Spraying device and preparation method of display panel - Google Patents
Spraying device and preparation method of display panel Download PDFInfo
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- CN109910437B CN109910437B CN201910057536.XA CN201910057536A CN109910437B CN 109910437 B CN109910437 B CN 109910437B CN 201910057536 A CN201910057536 A CN 201910057536A CN 109910437 B CN109910437 B CN 109910437B
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Abstract
The invention provides a spraying device and a preparation method of a display panel, wherein the spraying device comprises a nozzle, a tester, a first driving piece and a second driving piece, wherein the first driving piece drives the nozzle to horizontally move along the transverse direction, and the second driving piece drives a display device board to horizontally move along the longitudinal direction; wherein, the tester is fixedly connected with the nozzle. The tester is connected with the nozzle, the speed and the emergent deflection angle of the liquid drops sprayed out of the nozzle are tested once through one round, the speed and the emergent deflection angle of the liquid drops sprayed out of the nozzle are adjusted according to a test result, and therefore correction along with printing can be achieved, printing accuracy can be greatly improved, and the phenomenon that the liquid drops fall into an unexpected sub-pixel opening due to the fact that the liquid drops are unstable due to the ink characteristics, the temperature, the liquid drop residues and other factors is avoided.
Description
Technical Field
The invention relates to the technical field of display, in particular to a spraying device and a preparation method of a display panel.
Background
Organic electroluminescent devices (OLEDs) have been a promising new type of display device in recent years due to their advantages of self-luminescence, all solid state, high contrast, and the like. The OLED film prepared by the solution method has the advantages of high material utilization rate, low equipment cost and the like, and shows obvious advantages. The solution method drops a solution containing a light emitting material in the form of minute droplets at a predetermined position, and then evaporates the solvent to remove the solvent, leaving only a solute (the method of forming a thin film, abbreviated as IJP (Ink-Jet Printing), is currently the most suitable process for the current OLED light emitting device.
Currently, in order to ensure that the droplets can land accurately, an RDI device is generally used to perform speed and angle deviation tests on the droplets before printing, so as to record corresponding data. And the advanced ejection time of the nozzle can be automatically calculated according to the RDI result during printing, so that the accurate landing of the liquid drop is ensured.
However, in actual printing, the nozzles become unstable due to ink characteristics, temperature, droplet residue, and other factors, so that the droplet velocity and the predicted amount of angular deviation may occur during printing, and finally, the droplet may fall into the sub-pixel openings beyond the expected range, which may affect the display quality of the display panel.
Disclosure of Invention
The invention provides a spraying device, which aims to solve the technical problem that in the printing process of a display panel, a nozzle becomes unstable due to factors such as ink characteristics, temperature, liquid drop residue and the like, so that liquid drops fall into sub-pixel openings beyond expectation.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
a spray coating device comprising:
a nozzle;
the tester is used for testing the speed and the emergent deflection angle of the liquid drops sprayed by the nozzle;
a first driving member for driving the nozzle to horizontally move along the transverse direction; and
a second driving member for driving the display device panel to horizontally move in a longitudinal direction;
wherein, the tester is fixedly connected with the nozzle.
Furthermore, the spraying device also comprises a first guide rail arranged transversely, and the nozzle is connected with the first guide rail in a sliding manner along the length direction of the first guide rail.
Furthermore, the spraying device also comprises a second guide rail horizontally arranged along the longitudinal direction, and the second guide rail is positioned below the first guide rail.
Further, the first driving member and the second driving member are electric cylinders, air cylinders, hydraulic cylinders or conveyors.
The invention also provides a preparation method of the display panel, which comprises the following steps:
s10, placing the display device board on a second guide rail arranged along the longitudinal direction;
s20, testing the speed and the emergent deflection angle of the liquid drop sprayed by the nozzle by using a tester;
s30, adjusting the speed and the emergent deflection angle of the liquid drops sprayed out by the nozzle according to the test result, and then adjusting the nozzle to the initial position;
s40, moving the display device board along the second guide rail, and simultaneously opening the nozzle, wherein liquid drops are printed in the sub-pixel opening on the display device board through the nozzle in the moving process of the display device board;
s50, after liquid drops are dropped into the sub-pixel openings in the same row on the display device board, the speed and the emergent deflection angle of the liquid drops sprayed by the nozzle are tested again by the tester, and the nozzle is closed after the speed and the emergent deflection angle of the liquid drops sprayed by the nozzle are readjusted according to the test result;
s60, moving the nozzle to a preset position along a first guide rail, and opening the nozzle, wherein the first guide rail is arranged along the transverse direction;
s70, moving the display device board along the second guide rail while the nozzle prints the liquid drop into the sub-pixel opening on the display device board;
and S80, repeating the steps S30-S70, and dropping the liquid drops into all the sub-pixel openings on the display device board through the nozzle.
Further, the tester is fixedly connected with the nozzle.
Further, the nozzle is connected with the first guide rail in a sliding mode along the length direction of the first guide rail.
Further, the nozzle is provided with a first driving member for driving the nozzle to move along the first guide rail.
Further, the display device board is driven by a second driving member to move along the second guide rail.
Further, the first driving member and the second driving member are electric cylinders, air cylinders, hydraulic cylinders or conveyors.
The invention has the beneficial effects that: the tester is connected with the nozzle, the speed and the emergent deflection angle of the liquid drops sprayed out of the nozzle are tested once through one round, the speed and the emergent deflection angle of the liquid drops sprayed out of the nozzle are adjusted according to a test result, and therefore correction along with printing can be achieved, printing accuracy can be greatly improved, and the phenomenon that the liquid drops fall into an unexpected sub-pixel opening due to the fact that the liquid drops are unstable due to the ink characteristics, the temperature, the liquid drop residues and other factors is avoided.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a spray coating device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a process for manufacturing a display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the invention.
Reference numerals:
10. a nozzle; 20. a tester; 30. a first driving member; 40. a second driving member; 50. a first guide rail; 60. a second guide rail; 70. a display device panel; 71. a substrate; 72. a thin film transistor array substrate; 73. a pixel defining layer; 74. a sub-pixel opening; 80. a light emitting device layer; 90. and (7) packaging the layer.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
The invention aims at the technical problem that in the printing process of the existing display panel, a nozzle becomes unstable due to factors such as ink characteristics, temperature, droplet residue and the like, so that a droplet falls into an unexpected sub-pixel opening. The present invention can solve the above problems.
A spray coating apparatus, as shown in FIG. 1, includes a nozzle 10, a tester 20, a first driving member 30 for driving the nozzle 10 to horizontally move in a lateral direction, and a second driving member 40 for driving a display device board 70 to horizontally move in a longitudinal direction.
When the display device board 70 is printed, in the process of driving the display device board 70 to move by the second driving member 40, the nozzles 10 print the liquid drops into the corresponding sub-pixel openings 74 on the display device board 70, the liquid drops are printed into one column of sub-pixel openings 74 in one round, each time one round is completed, the nozzles 10 are driven by the first driving member 30 to move transversely once to print the liquid drops into the sub-pixel openings 74 in the next column, the nozzles 10 move once in one stroke, and the whole printing process is a plurality of rounds and a plurality of strokes.
The tester 20 is an RDI device, the tester 20 tests the speed and the exit declination angle of the liquid drop ejected from the nozzle 10, so that corresponding data can be recorded, and when the nozzle 10 is used for printing, the advanced ejection time of the nozzle 10 is calculated according to the corresponding data tested by the RDI device, so that the speed and the exit declination angle of the liquid drop ejected from the nozzle 10 are adjusted, and the accurate landing of the liquid drop is ensured.
Wherein the tester 20 is fixedly connected with the nozzle 10.
By connecting the tester 20 and the nozzle 10 together, the speed and the exit declination of the liquid drop ejected from the nozzle 10 are tested once by the tester 20 every round, and the speed and the exit declination of the liquid drop ejected from the nozzle 10 are adjusted according to the test result, so that the correction along with the printing can be realized, the printing accuracy can be greatly improved, and the phenomenon that the liquid drop falls into the sub-pixel opening 74 beyond expectation due to instability caused by factors such as ink characteristics, temperature, liquid drop residue and the like can be prevented.
Specifically, the first driving element 30 and the second driving element 40 are electric cylinders, air cylinders, hydraulic cylinders, or conveyors.
The first driving member 30 and the second driving member 40 may be the same or different.
In one embodiment, the first driving member 30 and the second driving member 40 are both air cylinders, and the extension rods of the air cylinders are fixedly connected to the display device board 70.
In another embodiment, the first driving member 30 and the second driving member 40 are both conveyors, and the display device plate 70 and the nozzles 10 are connected to a conveyor belt of the conveyors during printing, so that the display device plate 70 and the nozzles 10 are moved by the conveyor belt.
Specifically, the spraying device further comprises a first guide rail 50 arranged in the transverse direction, and the nozzle 10 is connected with the first guide rail 50 in a sliding manner along the length direction of the first guide rail 50. The movement of the nozzle 10 is facilitated by the provision of the first guide 50.
Specifically, the spraying device further comprises a second guide rail 60 horizontally arranged along the longitudinal direction, and the second guide rail 60 is located below the first guide rail 50.
Based on the spraying device, the invention also provides a preparation method of the display panel, as shown in fig. 1 and fig. 2, comprising the following steps:
s10, placing the display device board 70 on the second guide rail 60 arranged in the longitudinal direction;
s20, testing the speed and the exit declination angle of the liquid drop ejected from the nozzle 10 by the tester 20;
s30, adjusting the speed and the emergent deflection angle of the liquid drops sprayed by the nozzle 10 according to the test result, and then adjusting the nozzle 10 to the initial position;
s40, moving the display device board 70 along the second guide rail 60 while opening the nozzle 10, and printing liquid drops into the sub-pixel opening 74 on the display device board 70 through the nozzle 10 during the movement of the display device board 70;
s50, dropping liquid drops into the sub-pixel openings 74 in the same row on the display device board 70, testing the speed and the exit declination of the liquid drops ejected from the nozzle 10 by using the tester 20, readjusting the speed and the exit declination of the liquid drops ejected from the nozzle 10 according to the test result, and closing the nozzle 10;
s60, moving the nozzle 10 to a preset position along a first guide rail 50, and opening the nozzle 10, wherein the first guide rail 50 is arranged in a transverse direction;
s70, moving the display device board 70 along the second guide rail 60 while the nozzle 10 prints droplets into the sub-pixel opening 74 on the display device board 70;
s80, repeating steps S30 to S70, and dropping droplets into all the sub-pixel openings 74 on the display device board 70 through the nozzle 10.
When printing is performed on the display device board 70, in the process of driving the display device board 70 to move by the second driving member 40, the nozzle 10 prints droplets into the corresponding sub-pixel openings 74 on the display device board 70, and drops the droplets into one column of sub-pixel openings 74 for one round, and each time one round is completed, the first driving member 30 drives the nozzle 10 to move laterally once to print the droplets into the sub-pixel openings 74 of the next column, and the nozzle 10 moves once for one stroke, so that the whole printing process is a plurality of rounds and a plurality of strokes. After each round, the speed and the exit declination of the liquid drops ejected by the nozzle 10 are tested once by the tester 20, and the speed and the exit declination of the liquid drops ejected by the nozzle 10 are adjusted according to the test result, so that the correction along with the printing can be realized, and the printing accuracy can be greatly improved.
Specifically, the tester 20 is fixedly connected to the nozzle 10. So that the tester 20 can test the speed and the emergent deflection angle of the liquid drop sprayed by the nozzle 10 at any time.
Specifically, the nozzle 10 is slidably connected to the first rail 50 along a longitudinal direction of the first rail 50.
Further, the nozzle 10 is provided with a first driving member 30 for driving the nozzle to move along the first guide rail 50.
Specifically, the display device board 70 is driven by the second driving member 40 to move along the second guide rail 60.
Further, the first driving member 30 and the second driving member 40 are electric cylinders, air cylinders, hydraulic cylinders or conveyors.
The first driving member 30 and the second driving member 40 may be the same or different.
In one embodiment, the first driving member 30 and the second driving member 40 are both air cylinders, and the extension rods of the air cylinders are fixedly connected to the display device board 70.
In another embodiment, the first driving member 30 and the second driving member 40 are both conveyors, and the display device plate 70 and the nozzles 10 are connected to a conveyor belt of the conveyors during printing, so that the display device plate 70 and the nozzles 10 are moved by the conveyor belt.
It should be noted that, as shown in fig. 3, the display device board 70 includes a substrate 71, a thin film transistor array substrate 72 disposed on the substrate 71, and a pixel definition layer 73 disposed on the thin film transistor array substrate 72, the sub-pixel openings 74 are disposed on the pixel definition layer 73, and the nozzles 10 print liquid droplets into the sub-pixel openings 74 to form a light emitting device layer 80.
Wherein, the substrate 71 may be a hard substrate, such as a glass substrate; the substrate 71 may also be a flexible substrate, such as a polyimide substrate.
In addition, when the display panel is an OLED panel, the display panel further includes necessary components such as an encapsulation layer 90, and the method for manufacturing the display panel further includes:
s90, forming an encapsulation layer 90 on the display device board 70.
The invention has the beneficial effects that: by connecting the tester 20 and the nozzle 10 together, the speed and the exit declination of the liquid drop ejected from the nozzle 10 are tested once by the tester 20 every round, and the speed and the exit declination of the liquid drop ejected from the nozzle 10 are adjusted according to the test result, so that the correction along with the printing can be realized, the printing accuracy can be greatly improved, and the phenomenon that the liquid drop falls into the sub-pixel opening 74 beyond expectation due to instability caused by factors such as ink characteristics, temperature, liquid drop residue and the like can be prevented.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (5)
1. A preparation method of a display panel is characterized by comprising the following steps:
s10, placing the display device board on a second guide rail arranged along the longitudinal direction;
s20, testing the speed and the emergent deflection angle of the liquid drops sprayed out of the nozzle by using a tester, wherein the tester is fixedly connected with the nozzle;
s30, adjusting the speed and the emergent deflection angle of the liquid drops sprayed out by the nozzle according to the test result, and then adjusting the nozzle to the initial position;
s40, moving the display device board along the second guide rail, and simultaneously opening the nozzle, wherein liquid drops are printed in the sub-pixel opening on the display device board through the nozzle in the moving process of the display device board;
s50, after liquid drops are dropped into the sub-pixel openings in the same row on the display device board, the speed and the emergent deflection angle of the liquid drops sprayed by the nozzle are tested again by the tester, and the nozzle is closed after the speed and the emergent deflection angle of the liquid drops sprayed by the nozzle are readjusted according to the test result;
s60, moving the nozzle to a preset position along a first guide rail, and opening the nozzle, wherein the first guide rail is arranged along the transverse direction;
s70, moving the display device board along the second guide rail while the nozzle prints the liquid drop into the sub-pixel opening on the display device board;
and S80, repeating the steps S30-S70, and dropping the liquid drops into all the sub-pixel openings on the display device board through the nozzle.
2. The method of claim 1, wherein the nozzle is slidably coupled to the first rail along a length of the first rail.
3. The method for manufacturing a display panel according to claim 2, wherein the nozzle is provided with a first driving member for driving the nozzle to move along the first guide rail.
4. The method of claim 3, wherein the display panel is driven by a second driving member to move along the second guide rail.
5. The method of claim 4, wherein the first driving member and the second driving member are electric cylinders, pneumatic cylinders, hydraulic cylinders, or conveyors.
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| CN201910057536.XA CN109910437B (en) | 2019-01-22 | 2019-01-22 | Spraying device and preparation method of display panel |
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| CN201910057536.XA CN109910437B (en) | 2019-01-22 | 2019-01-22 | Spraying device and preparation method of display panel |
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| CN109910437B true CN109910437B (en) | 2020-10-13 |
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| CN100343702C (en) * | 2001-07-04 | 2007-10-17 | 精工爱普生株式会社 | Method and device for forming film photoelectric device and its making method |
| CN100377877C (en) * | 2003-12-02 | 2008-04-02 | 铼宝科技股份有限公司 | Ink jet printing device for organic luminous panel |
| KR100942528B1 (en) * | 2005-04-25 | 2010-02-16 | 가부시키가이샤 아루박 | Droplet analysis system |
| JP5455370B2 (en) * | 2005-10-07 | 2014-03-26 | コーニンクレッカ フィリップス エヌ ヴェ | Inkjet device for controlled positioning of a droplet of material on a substrate, method for controlled positioning of a droplet of material, method for determining alteration of a material during a printing process, and inkjet Equipment use |
| CN100586718C (en) * | 2006-02-13 | 2010-02-03 | 精工爱普生株式会社 | Pattern forming method, droplet discharge device, electro-optic device and liquid crystal display device |
| JP4289391B2 (en) * | 2006-12-20 | 2009-07-01 | セイコーエプソン株式会社 | Liquid drawing method, color filter manufacturing method, organic EL device manufacturing method |
| US7926900B2 (en) * | 2006-12-22 | 2011-04-19 | Palo Alto Research Center Incorporated | Method of printing with high spot placement accuracy |
| EP2296442B1 (en) * | 2008-05-29 | 2016-08-31 | Panasonic Intellectual Property Management Co., Ltd. | Method of manufacturing an organic electroluminescent display |
| CN102351435B (en) * | 2010-06-02 | 2015-07-08 | 松下电器产业株式会社 | Coating method and manufacturing method of organic electroluminescent display |
| KR101751552B1 (en) * | 2011-06-03 | 2017-06-27 | 가부시키가이샤 제이올레드 | Manufacturing method of organic el display panel and manufacturing apparatus of organic el display panel |
| CN104870195B (en) * | 2012-12-10 | 2017-09-12 | 惠普发展公司，有限责任合伙企业 | Corresponding to the drop detection in the transmission path of print-head nozzle |
| JP6155629B2 (en) * | 2012-12-21 | 2017-07-05 | セイコーエプソン株式会社 | Nozzle discharge amount correction method, functional liquid discharge method, and organic EL device manufacturing method |
| JP6576124B2 (en) * | 2015-07-02 | 2019-09-18 | 東京エレクトロン株式会社 | Droplet ejection apparatus, droplet ejection method, program, and computer storage medium |
| CN107179287B (en) * | 2016-03-09 | 2020-12-08 | 东京毅力科创株式会社 | Droplet inspection apparatus and droplet inspection method |
| CN107464877B (en) * | 2016-06-06 | 2020-01-14 | 东京毅力科创株式会社 | Inspection device, inspection method, and functional liquid discharge device |
| CN205705757U (en) * | 2016-06-24 | 2016-11-23 | 纳晶科技股份有限公司 | A kind of printing device for preparing luminescent device, printing substrate and print system |
| CN107627749A (en) * | 2016-07-19 | 2018-01-26 | 程好学 | A kind of method of inkjet printing |
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