CN111086339A - Method for improving film thickness uniformity of different areas of ink-jet printing substrate - Google Patents
Method for improving film thickness uniformity of different areas of ink-jet printing substrate Download PDFInfo
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- CN111086339A CN111086339A CN201911302070.1A CN201911302070A CN111086339A CN 111086339 A CN111086339 A CN 111086339A CN 201911302070 A CN201911302070 A CN 201911302070A CN 111086339 A CN111086339 A CN 111086339A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0082—Digital printing on bodies of particular shapes
- B41M5/0088—Digital printing on bodies of particular shapes by ink-jet printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat
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Abstract
The invention provides a method for improving the film thickness uniformity of different areas of an ink-jet printing substrate, which comprises the following steps: s1, dividing the substrate into N printing areas according to the printing sequence of the nozzles, wherein the N printing areas have the same printing direction of the nozzles; and S2, setting m temperature control modules below each printing area, wherein the m temperature control modules have different control temperatures, and the control temperatures of the m temperature control modules of the (i-1) th printing area are all smaller than the control temperatures of the m temperature control modules of the (i) th printing area. According to the invention, the temperature control modules are designed for different printing areas under the substrate, the film thickness uniformity of the OLED substrate in the vacuum drying process is improved by controlling the temperatures of different printing subareas and different ink drop atmosphere difference areas, the phenomenon of uneven film forming appearance of the printing subareas is relieved, Swah mura is reduced, the brightness uniformity of the substrate is caused, and the integral display effect is improved.
Description
Technical Field
The invention relates to the technical field of inkjet printing OLED display, in particular to a method for improving the film thickness uniformity of different areas of an inkjet printing substrate.
Background
Ink Jet Printing (IJP) is a new process technology capable of directly performing patterned thin film deposition, and therefore, currently, each functional layer in an OLED (Organic Light-Emitting Display), such as a hole transport layer, an Organic Light-Emitting layer, and an electron transport layer, is usually formed into a specific pattern by using an ink jet printing technology.
The specific process of ink-jet printing is to dissolve each functional layer material of the OLED device as a solute in a corresponding solvent, thereby preparing ink drops for ink-jet printing. In the printing process of the large-size OLED display substrate, because the number of the nozzles in the inkjet printing device is limited, the printing of the whole OLED display substrate cannot be completed by one-time printing, and therefore, the substrate needs to be printed in a partitioned manner, which causes a problem: because there is the difference between each printing region ink droplet concentration and the dry atmosphere on the base plate, solvent volatilization velocity when leading to the ink droplet dry is different, and the volatilization velocity that prints the region earlier is faster than the volatilization velocity that prints the region afterwards, prints the marginal area and is faster than the volatilization velocity of inner zone, and this film thickness that just causes the different printing subareas of OLED display substrate is inhomogeneous, appears Swah Mura promptly for this OLED display substrate's shows that luminance is inhomogeneous, finally influences the display effect.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method for improving the film thickness uniformity of different areas of an ink-jet printing substrate.
The invention provides a method for improving the film thickness uniformity of different areas of an ink-jet printing substrate, which comprises the following steps:
s1, sequentially dividing the substrate into N printing areas according to the printing sequence of the nozzles, wherein the N printing areas have the same printing direction of the nozzles;
s2, setting m temperature control modules below each printing area, wherein the m temperature control modules have different control temperatures, and the control temperatures of the m temperature control modules of the (i-1) th printing area are all smaller than the control temperatures of the m temperature control modules of the (i) th printing area;
wherein i is more than or equal to 2 and less than or equal to N.
Preferably, in S1, the number of printing areas is calculated based on the number of heads of the printer, the number of nozzles of the heads, and the size of the substrate.
Preferably, in S2, the temperature control module is a resistance heating module, a fluid heating module, or an electric heating module.
Preferably, in S2, in each printing area, the control temperature of the temperature control module at the edge position of the printing area is lower than the control temperature of the temperature control module at the center position of the printing area.
Preferably, in S2, in each printing region, the control temperature of the temperature control module printed first is lower than the control temperature of the temperature control module printed later.
According to the method for improving the film thickness uniformity of the ink-jet printing substrate in different areas, the temperature control modules are designed for different printing areas below the substrate, the film thickness uniformity of the OLED substrate in the vacuum drying process is improved by controlling the temperatures of different printing subareas and different ink drop atmosphere difference areas, the phenomenon of uneven film forming appearance of the printing subareas is relieved, Swah mura is reduced, the brightness uniformity of the substrate is caused, and the overall display effect is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art inkjet printing process for printing on an OLED display substrate;
FIG. 2 is a flowchart of a method for improving the uniformity of film thickness in different areas of an inkjet printed substrate according to the present invention;
FIG. 3 is a schematic diagram illustrating the division of the printing regions of the substrate according to the method for improving the uniformity of the film thickness of different regions of the substrate for ink-jet printing according to the present invention;
FIG. 4 is a schematic diagram illustrating a temperature control module setting of a print area according to an embodiment;
FIG. 5 is a schematic diagram of the temperature control module setting of the printing area according to the second embodiment.
Detailed Description
Referring to fig. 2-5, the present invention provides a method for improving film thickness uniformity of different areas of an inkjet printing substrate, comprising the following steps:
s1, sequentially dividing the substrate into N printing areas according to the printing sequence of the nozzles, wherein the N printing areas have the same printing direction of the nozzles; wherein: the number of the printing areas is calculated according to the number of the nozzles of the printer, the number of the nozzles and the size of the substrate;
s2, setting m temperature control modules below each printing area, wherein the m temperature control modules have different control temperatures, and the control temperatures of the m temperature control modules of the (i-1) th printing area are all smaller than the control temperatures of the m temperature control modules of the (i) th printing area;
wherein: the temperature control module is a resistance heating module, a fluid heating module or an electric heating module, and i is more than or equal to 2 and less than or equal to N.
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example one
Referring to fig. 2-4, a method for improving the film thickness uniformity of different areas of an inkjet printing substrate comprises the following steps:
s1, sequentially dividing the substrate into N printing areas according to the printing sequence of the nozzles, wherein the N printing areas have the same printing direction of the nozzles; wherein: the number of the printing areas is calculated according to the number of the nozzles of the printer, the number of the nozzles and the size of the substrate;
s2, setting m rectangular temperature control modules below each printing area, wherein the control temperature of the temperature control module at the edge position of each printing area is lower than that of the temperature control module at the center position of each printing area, the control temperature of the temperature control module printed firstly is lower than that of the temperature control module printed later, and the control temperatures of the m temperature control modules of the (i-1) th printing area are all lower than that of the m temperature control modules of the (i) th printing area; wherein: the temperature control module is a resistance heating module;
for example, referring to fig. 3, the substrate is sequentially divided into 6 printing areas, named 11, 12, 13, 14, 15, and 16, according to the printing order of the nozzles; to ensure uniformity of ink drying before and after printing by the nozzle, the overall temperature of the first printing region is lower than the overall temperature of the second printing region, i.e. T11<T12<T13<T14<T15<T16。
For example, referring to fig. 4, 8 temperature control modules are arranged below the 11 regions, and are respectively named as 111, 112, 113, 114, 115, 116, 117 and 118; in 11-region printing, to ensure the ink drying degree uniformity of 11 regions and avoid the situation that the edge dries quickly, the temperature control modules of 11 regions are set at a temperature such that the edge temperature is lower than the temperature of the central region and the control temperature of the temperature control module printed first is set lower than the control temperature of the temperature control module printed later, such as T111<T113，T112<T114，T115<T117，T116<T118The concrete can be determined according to the actual process condition.
Example two
Referring to fig. 2, 3 and 5, a method for improving the film thickness uniformity of different areas of an ink-jet printing substrate comprises the following steps:
s1, sequentially dividing the substrate into N printing areas according to the printing sequence of the nozzles, wherein the N printing areas have the same printing direction of the nozzles; wherein: the number of the printing areas is calculated according to the number of the nozzles of the printer, the number of the nozzles and the size of the substrate;
s2, arranging m clip-shaped temperature control modules below each printing area, wherein the control temperature of the temperature control module at the edge position of the printing area is lower than that of the temperature control module at the center position of the printing area, and the control temperature of the m temperature control modules of the (i-1) th printing area is lower than that of the m temperature control modules of the (i) th printing area; wherein: the temperature control module is a fluid heating module;
for example, referring to fig. 3, the substrate is sequentially divided into 6 printing areas, named 11, 12, 13, 14, 15, and 16, according to the printing order of the nozzles; to ensure the uniformity of the ink drying degree before and after the printing by the nozzle, the temperature of the whole printing area is lower than that of the whole printing area, i.e. T11<T12<T13<T14<T15<T16。
For example, referring to FIG. 5, a clip is usedThe cutting mode is that 3 temperature control modules are arranged below the 11 regions and are respectively named as 111, 112 and 113; in 11-region printing, in order to ensure the ink drying degree uniformity of 11 regions and avoid the situation that the edge is dried quickly, the temperature control module of 11 regions is set to the temperature that the edge temperature is lower than the temperature of the central region, such as T111<T112<T113Specifically, the method may be additionally provided according to the actual process production condition.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A method for improving the film thickness uniformity of different areas of an ink-jet printing substrate is characterized by comprising the following steps:
s1, sequentially dividing the substrate into N printing areas according to the printing sequence of the nozzles, wherein the N printing areas have the same printing direction of the nozzles;
s2, setting m temperature control modules below each printing area, wherein the m temperature control modules have different control temperatures, and the control temperatures of the m temperature control modules of the (i-1) th printing area are all smaller than the control temperatures of the m temperature control modules of the (i) th printing area;
wherein i is more than or equal to 2 and less than or equal to N.
2. The method for improving the film thickness uniformity of different areas of an inkjet printed substrate according to claim 1, wherein in S1, the number of printing areas is calculated according to the number of nozzles of the printer, the number of nozzles of the nozzles, and the size of the substrate.
3. The method for improving the film thickness uniformity of different areas of an inkjet printed substrate according to claim 1, wherein in S2, the temperature control module is a resistance heating module, a fluid heating module or an electric heating module.
4. The method for improving the film thickness uniformity of different areas of an inkjet printing substrate according to any one of claims 1 to 3, wherein in S2, the control temperature of the temperature control module at the edge position of the printing area is lower than the control temperature of the temperature control module at the center position of the printing area in each printing area.
5. The method for improving the film thickness uniformity of different areas of an inkjet printed substrate according to claim 4, wherein in S2, the control temperature of the temperature control module for printing first is lower than the control temperature of the temperature control module for printing later in each printing area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911302070.1A CN111086339A (en) | 2019-12-17 | 2019-12-17 | Method for improving film thickness uniformity of different areas of ink-jet printing substrate |
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| CN201911302070.1A CN111086339A (en) | 2019-12-17 | 2019-12-17 | Method for improving film thickness uniformity of different areas of ink-jet printing substrate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114103507A (en) * | 2021-10-11 | 2022-03-01 | 厦门微亚智能科技有限公司 | Film forming method, film forming equipment and display device |
| CN114619771A (en) * | 2020-12-11 | 2022-06-14 | 京东方科技集团股份有限公司 | Inkjet printing apparatus and inkjet printing method |
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| JP2009298891A (en) * | 2008-06-11 | 2009-12-24 | Seiko Epson Corp | Joining method and assembly |
| CN102241192A (en) * | 2010-04-30 | 2011-11-16 | 精工爱普生株式会社 | Liquid ejecting apparatus |
| US9150325B2 (en) * | 2008-10-20 | 2015-10-06 | Plastipak Packaging, Inc. | Recyclable printed plastic container and method |
| CN105870359A (en) * | 2016-04-12 | 2016-08-17 | 京东方科技集团股份有限公司 | Preparation method of thin film, temperature control device and system for preparing thin film |
| CN109309159A (en) * | 2018-10-12 | 2019-02-05 | 合肥鑫晟光电科技有限公司 | A kind of method for manufacturing thin film, display panel and preparation method thereof, display device |
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2019
- 2019-12-17 CN CN201911302070.1A patent/CN111086339A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009298891A (en) * | 2008-06-11 | 2009-12-24 | Seiko Epson Corp | Joining method and assembly |
| US9150325B2 (en) * | 2008-10-20 | 2015-10-06 | Plastipak Packaging, Inc. | Recyclable printed plastic container and method |
| CN102241192A (en) * | 2010-04-30 | 2011-11-16 | 精工爱普生株式会社 | Liquid ejecting apparatus |
| CN105870359A (en) * | 2016-04-12 | 2016-08-17 | 京东方科技集团股份有限公司 | Preparation method of thin film, temperature control device and system for preparing thin film |
| CN109309159A (en) * | 2018-10-12 | 2019-02-05 | 合肥鑫晟光电科技有限公司 | A kind of method for manufacturing thin film, display panel and preparation method thereof, display device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114619771A (en) * | 2020-12-11 | 2022-06-14 | 京东方科技集团股份有限公司 | Inkjet printing apparatus and inkjet printing method |
| CN114619771B (en) * | 2020-12-11 | 2023-10-27 | 京东方科技集团股份有限公司 | Inkjet printing apparatus and inkjet printing method |
| CN114103507A (en) * | 2021-10-11 | 2022-03-01 | 厦门微亚智能科技有限公司 | Film forming method, film forming equipment and display device |
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Application publication date: 20200501 |