CN115851166A - OLED support film preparation process - Google Patents
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000010410 layer Substances 0.000 claims abstract description 73
- 239000012790 adhesive layer Substances 0.000 claims abstract description 41
- 230000001681 protective effect Effects 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 239000011265 semifinished product Substances 0.000 claims abstract description 25
- 239000000853 adhesive Substances 0.000 claims abstract description 22
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- 238000002834 transmittance Methods 0.000 claims abstract description 7
- 239000010408 film Substances 0.000 claims description 160
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- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims description 12
- UIHCLUNTQKBZGK-UHFFFAOYSA-N 3-methyl-2-pentanone Chemical compound CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 12
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 12
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- 229930185605 Bisphenol Natural products 0.000 claims description 10
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- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 claims description 6
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 6
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Abstract
The invention discloses a preparation process of an OLED (organic light emitting diode) support film, wherein the OLED support film comprises a transparent protective film, a base film layer, a treatment layer, an adhesive layer and a blue protective film, and the preparation process of the OLED support film comprises the following steps: preparing a treatment layer liquid; covering a transparent protective film on one surface of a base material film, coating a treatment layer liquid on the other surface of the base material film, and drying to obtain a first semi-finished base material with a treatment layer on the surface; preparing an adhesive liquid; coating the adhesive liquid on the treatment layer of the first semi-finished product substrate, baking by adopting a tunnel type oven, and drying to obtain a second semi-finished product substrate with the adhesive layer on the surface; and covering a blue protective film on the adhesive layer of the second semi-finished product substrate to obtain the OLED supporting film. The OLED support film prepared by the process effectively solves the problems of low transmittance, high haze, poor bending resistance and yellowing of the color of the adhesive.
Description
Technical Field
The invention relates to the technical field of electronic products, in particular to a preparation process of an OLED (organic light emitting diode) support film.
Background
An OLED (Organic Light-Emitting Diode) is called an Organic Light-Emitting Diode, and is a third generation display technology following CRT and LCD technologies. OLED technology has gradually entered the display field due to its self-luminescent properties considered to have advantages of being light and thin, flexible, high contrast, fast response, high color gamut, wide viewing angle, low power consumption, low cost, etc. When the flexible OLED device is used, the flexible substrate of the flexible OLED is very thin, the stiffness is not enough, deformation is easy to occur, the use experience and the service life of an OLED device can be seriously influenced, and therefore in the actual production process, the support film needs to be attached to the substrate of the OLED device to play a supporting role. However, the thermal and optical requirements of the common support film cannot meet a certain transmittance, the problem of viscosity reduction of the adhesive in a high-temperature environment exists, and the common support film is easy to generate obvious permanent deformation after being folded for many times and is difficult to return to the original flat state.
Therefore, it is desirable to develop an OLED support film with high bending, high transmittance and good adhesion under high temperature environment to solve the above problems.
Disclosure of Invention
Based on the problems in the prior art, the invention provides the preparation process of the OLED support film, and the problems of low transmittance, high haze, poor bending resistance and reduced viscosity of the adhesive in a high-temperature environment are effectively solved by using the preparation process of the OLED support film.
The invention is implemented by the following technical scheme:
the preparation process of the OLED support film comprises the following steps:
step S1, preparing a treatment layer raw material according to the following weight percentage: 20-30% of zirconium oxide, 10-20% of 3-methyl-2-pentanone, 10-20% of aliphatic solvent, 10-20% of 1-methoxy-2-propanol, 10-20% of cyclohexanone, 10-30% of photosensitive resin and 0.5-1% of pentaerythritol triacrylate;
s2, mixing the raw materials of the treatment layer in the step S1, dispersing for 1-3h by using a high-speed dispersion machine, maintaining the temperature at 25-30 ℃ by using a constant-temperature water tank, rotating at 800-1200r/min, filtering by using a filter screen of 5-10 mu m after dispersion is finished, and standing for 2h to obtain a treatment layer liquid;
s3, covering a transparent protective film on one surface of a base material film, coating the treatment layer liquid in the step S2 on the other surface of the base material film, baking by adopting a tunnel type oven, and drying to obtain a first semi-finished base material with a treatment layer on the surface;
s4, preparing the raw materials of the adhesive layer according to the following weight percentage: 38-60% of rubber, 0.5-1% of ion scavenger, 0.5-1% of antioxidant, 0.5-1% of accelerator and 38-60% of bisphenol resin;
s5, mixing the raw materials of the adhesive layer in the step S4, dispersing for 3-5h by using a high-speed dispersion machine, maintaining the temperature at 25-30 ℃ by using a constant-temperature water tank, rotating at the speed of 800-1200r/min, and filtering by using a 5-10 mu m filter screen after dispersion is finished to obtain an adhesive liquid;
s6, coating the adhesive liquid in the step S5 on the treatment layer of the first semi-finished base material in the step S3, baking by adopting a tunnel type oven, and drying to obtain a second semi-finished base material with an adhesive layer on the surface;
and S7, covering a blue protective film on the adhesive layer of the second semi-finished product substrate in the step S6, detecting the OLED support film through an online detection device, and obtaining the OLED support film after the detection is qualified.
Further, the base film layer is any one of PET, liquid transparent PI, CPI, PEN and PA, the thickness of the base film layer is 12.5-125 μm, and the transmittance is more than 90%.
Further, the transparent protective film is a KNQ-LD150 thin film produced by Shenzhen Kono bridge science and technology GmbH, and the thickness is 25-125 μm.
Further, the blue protective film is a KNQ-LD90 film produced by Shenzhenjinko bridge science and technology Limited and has a thickness of 25-125 μm.
Further, the thickness of the treatment layer is 5-15 μm.
Further, the thickness of the adhesive layer is 5 to 50 μm.
Further, the aliphatic solvent in step S1 is methyl ether;
the photosensitive resin was CMC2200.
Further, the rubber in the step S4 is one or two of nitrile rubber 1072cgj and 1072 cgx;
the ion scavenger is IXE-100;
the antioxidant is G200 or L1010;
the promoter is EVERRNOX-10;
the bisphenol transparent resin is one or a mixture of two of E-12 (604) and E-20 (601).
Further, the tunnel type oven in the step S3 and the step S6 is divided into six sections, and the temperature of each section is 60 ℃, 80 ℃, 160 ℃ and 60 ℃ in sequence; the wind frequency of each air-saving inlet is 25Hz, 20Hz and 25Hz in sequence; the air frequency of the exhaust air is 40Hz.
Further, in step S7, the OLED support film is detected by an online detection method, and the online detection device includes the following modules:
an image acquisition module: comprises a CCD industrial camera for collecting the image of the supporting film;
a calculation module: carrying out gray scale calculation processing on a support film image acquired by a CCD industrial phase;
an analysis control module: and comparing the calculated results with a threshold value, judging whether the OLED supporting film has defects or not, and controlling whether the production line runs or not.
Further, the OLED support film online detection device performs the following operations:
(1) The image acquisition module adopts a CCD industrial camera and matched software to acquire images of the OLED supporting film according to a set time interval;
(2) The calculation module performs graying calculation processing on the collected OLED support film by utilizing a median filtering algorithm to obtain a first grayed image f (x, y), wherein the gray level of a pixel of the first grayed image f (x, y) is L, and the probability of the occurrence of the gray pixel of the ith (i belongs to 0,2, \ 8230;, L-1) level is k i ；
(3) Information entropy H of pixel block AxA in collected image A And (3) calculating:
wherein, p and q are the minimum value and the maximum value of the gray value in the pixel block;
(4) Calculating the dispersion degree alpha of the gray value of the pixel block AxA in the acquired image:
wherein M is the number of pixels in the pixel block, y i Is the gray value of the i-th pixel,
is the gray level mean of the pixel block;
(5) Respectively setting threshold values T A And T α When the information entropy H is calculated A ≤T A And alpha is less than or equal to T α And if the quality of the OLED supporting film is judged to be qualified, the production line normally works, otherwise, the quality of the OLED supporting film is judged to be unqualified, and the control module sends an instruction to the production line controller to stop working.
The invention has the beneficial effects that:
the OLED support film prepared by the process comprises the transparent protective film, the base film layer, the processing layer, the adhesive layer and the blue protective film, so that an OLED display screen is more transparent and has lower haze. The processing layer is coated on the base film layer in the preparation process, so that the tensile property of the base film can be enhanced, the bending resistance is better, and the deformation caused by excessive bending times is prevented. The OLED support film adhesive has excellent viscosity at normal temperature, still keeps good viscosity in a high-temperature environment, and solves the problem of viscosity reduction of the adhesive in the high-temperature environment.
Drawings
The accompanying drawings, which are included to provide a further explanation of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic layer structure of an OLED support film according to the present invention.
Wherein, the coating comprises 1-transparent protective film, 2-base film layer, 3-treatment layer, 4-adhesive layer and 5-blue protective film.
Detailed Description
The technical solution of the present invention is further described below with reference to specific examples, but the scope of the present invention is not limited to the following examples. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Fig. 1 is a schematic layer structure diagram of an OLED support film provided by the present invention, where the OLED support film includes a transparent protective film 1, a base film layer 2, a processing layer 3, an adhesive layer 4, and a blue protective film 5.
In particular, in the embodiment of the present invention, the transparent protective film is a KNQ-LD150 thin film manufactured by shenzhenjinko knoo technologies ltd, and has a thickness of 25 μm.
In particular, in the embodiment of the present invention, the blue protective film is a KNQ-LD90 thin film manufactured by shenzhenjinko bridge science and technology ltd, and has a thickness of 25 μm.
In particular, in the embodiment of the present invention, the base film layer is a CPI film, the thickness of the base film layer is 75 μm, and the transmittance is greater than 90%.
Example 1
The OLED support film comprises a transparent protective film, a base film layer, a processing layer, an adhesive layer and a blue protective film, wherein the thicknesses of the layers are respectively 25 micrometers, 75 micrometers, 10 micrometers, 15 micrometers and 25 micrometers, and the preparation process of the OLED support film comprises the following steps:
step S1, preparing a treatment layer raw material according to the following weight percentage: 24% of zirconium oxide, 15% of 3-methyl-2-pentanone, 12% of methyl ether, 15% of 1-methoxy-2-propanol, 12% of cyclohexanone, 2200.5% of CMC, and 0.5% of pentaerythritol triacrylate;
s2, mixing the raw materials of the treatment layer in the step S1, dispersing for 3 hours by using a high-speed dispersion machine, keeping the temperature at 25 ℃ by using a constant-temperature water tank, rotating at 1000r/min, filtering by using a filter screen with the diameter of 8 mu m after the dispersion is finished, and standing for 2 hours to obtain a treatment layer liquid;
s3, covering one surface of a substrate film CPI with a transparent protective film KNQ-LD150 film, coating the treatment layer liquid in the step S2 on the other surface of the substrate film CPI, and baking by adopting a tunnel type baking oven, wherein the tunnel type baking oven is divided into six sections, the temperature of each section is 60 ℃, 80 ℃, 160 ℃, 60 ℃, the air inlet frequency of each section is 25Hz, 20Hz and 25Hz, and the air exhaust frequency is 40Hz, so as to obtain a first semi-finished product substrate with a treatment layer on the surface;
s4, preparing raw materials of the adhesive layer according to the following weight percentage: nitrile rubber 1072cgj 50.5%, ion trapping agent IXE-100.5%, antioxidant G200.5%, accelerator EVERRNOX-10.5%, bisphenol resin E-12 (604) 48%;
step S5, mixing the raw materials of the adhesive layer in the step S4, dispersing for 5 hours by using a high-speed dispersion machine, maintaining the temperature at 30 ℃ by using a constant-temperature water tank, rotating at 1000r/min, and filtering by using a filter screen with the size of 8 mu m after the dispersion is finished to obtain an adhesive liquid;
s6, coating the adhesive liquid obtained in the step S5 on a treatment layer of the first semi-finished product base material obtained in the step S3, baking by adopting a tunnel oven, wherein the tunnel oven is divided into six sections, the temperatures of the sections are 60 ℃, 80 ℃, 160 ℃ and 60 ℃, the air inlet frequencies are 25Hz, 20Hz and 25Hz, and the air exhaust frequencies are 40Hz, and drying is carried out to obtain a second semi-finished product base material with an adhesive layer on the surface;
and S7, covering a blue protective film KNQ-LD90 film on the adhesive layer of the second semi-finished product substrate in the step S6, detecting the OLED support film through an online detection device, and obtaining the OLED support film after the detection is qualified.
Example 2
The OLED support film comprises a transparent protective film, a base film layer, a processing layer, an adhesive layer and a blue protective film, wherein the thicknesses of the layers are respectively 25 micrometers, 75 micrometers, 10 micrometers, 15 micrometers and 25 micrometers, and the preparation process of the OLED support film comprises the following steps:
step S1, preparing a treatment layer raw material according to the following weight percentage: 30% of zirconium oxide, 10% of 3-methyl-2-pentanone, 10% of methyl ether, 12% of 1-methoxy-2-propanol, 12% of cyclohexanone, 2200% of CMC, and 1% of pentaerythritol triacrylate;
s2, mixing the raw materials of the treatment layer in the step S1, dispersing for 3 hours by using a high-speed dispersion machine, keeping the temperature at 25 ℃ by using a constant-temperature water tank, rotating at 1000r/min, filtering by using a filter screen with the diameter of 8 mu m after the dispersion is finished, and standing for 2 hours to obtain a treatment layer liquid;
s3, covering one surface of a substrate film CPI with a transparent protective film KNQ-LD150 film, coating the treatment layer liquid in the step S2 on the other surface of the substrate film CPI, and baking by adopting a tunnel type baking oven, wherein the tunnel type baking oven is divided into six sections, the temperature of each section is 60 ℃, 80 ℃, 160 ℃, 60 ℃, the air inlet frequency of each section is 25Hz, 20Hz and 25Hz, and the air exhaust frequency is 40Hz, so as to obtain a first semi-finished product substrate with a treatment layer on the surface;
s4, preparing raw materials of the adhesive layer according to the following weight percentage: nitrile rubber 1072cgj 50.5%, ion scavenger IXE-100.5%, antioxidant G200.5%, accelerator EVERRNOX-10.5%, bisphenol resin E-12 (604) 48%;
s5, mixing the raw materials of the adhesive layer in the step S4, dispersing for 5 hours by using a high-speed dispersion machine, keeping the temperature at 30 ℃ by using a constant-temperature water tank, rotating at 1000r/min, and filtering by using a filter screen with the diameter of 8 mu m after the dispersion is finished to obtain an adhesive liquid;
s6, coating the adhesive liquid in the step S5 on a treatment layer of the first semi-finished product base material in the step S3, baking by adopting a tunnel type oven, wherein the tunnel type oven is divided into six sections, the temperatures of the sections are 60 ℃, 80 ℃, 160 ℃, 60 ℃, the air inlet frequencies of the sections are 25Hz, 20Hz and 25Hz in sequence, and the air exhaust frequencies are 40Hz, and drying is carried out to obtain a second semi-finished product base material with an adhesive layer on the surface;
and S7, covering a blue protective film KNQ-LD90 film on the adhesive layer of the second semi-finished product substrate in the step S6, detecting the OLED support film through an online detection device, and obtaining the OLED support film after the detection is qualified.
Example 3
The OLED support film comprises a transparent protective film, a base film layer, a processing layer, an adhesive layer and a blue protective film, wherein the thicknesses of the layers are respectively 25 micrometers, 75 micrometers, 10 micrometers, 15 micrometers and 25 micrometers, and the preparation process of the OLED support film comprises the following steps:
step S1, preparing a treatment layer raw material according to the following weight percentage: 24% of zirconium oxide, 15% of 3-methyl-2-pentanone, 12% of methyl ether, 15% of 1-methoxy-2-propanol, 12% of cyclohexanone, 2200.5% of CMC, and 0.5% of pentaerythritol triacrylate;
s2, mixing the raw materials of the treatment layer in the step S1, dispersing for 3 hours by using a high-speed dispersion machine, keeping the temperature at 25 ℃ by using a constant-temperature water tank, rotating at 1000r/min, filtering by using a filter screen with the diameter of 8 mu m after the dispersion is finished, and standing for 2 hours to obtain a treatment layer liquid;
s3, covering one surface of a substrate film CPI with a transparent protective film KNQ-LD150 film, coating the treatment layer liquid in the step S2 on the other surface of the substrate film CPI, and baking by adopting a tunnel type baking oven, wherein the tunnel type baking oven is divided into six sections, the temperature of each section is 60 ℃, 80 ℃, 160 ℃, 60 ℃, the air inlet frequency of each section is 25Hz, 20Hz and 25Hz, and the air exhaust frequency is 40Hz, so as to obtain a first semi-finished product substrate with a treatment layer on the surface;
s4, preparing raw materials of the adhesive layer according to the following weight percentage: nitrile rubber 1072cgx 48%, ion scavenger IXE-100.5%, antioxidant G200.5%, accelerator EVERRNOX-10%, bisphenol resin E-20 (601) 50%;
s5, mixing the raw materials of the adhesive layer in the step S4, dispersing for 5 hours by using a high-speed dispersion machine, keeping the temperature at 30 ℃ by using a constant-temperature water tank, rotating at 1000r/min, and filtering by using a filter screen with the diameter of 8 mu m after the dispersion is finished to obtain an adhesive liquid;
s6, coating the adhesive liquid in the step S5 on a treatment layer of the first semi-finished product base material in the step S3, baking by adopting a tunnel type oven, wherein the tunnel type oven is divided into six sections, the temperatures of the sections are 60 ℃, 80 ℃, 160 ℃, 60 ℃, the air inlet frequencies of the sections are 25Hz, 20Hz and 25Hz in sequence, and the air exhaust frequencies are 40Hz, and drying is carried out to obtain a second semi-finished product base material with an adhesive layer on the surface;
and S7, covering a blue protective film KNQ-LD90 film on the adhesive layer of the second semi-finished product substrate in the step S6, detecting the OLED support film through an online detection device, and obtaining the OLED support film after the detection is qualified.
Comparative example 1
The preparation process of the OLED support film comprises the following steps of:
step S1, preparing raw materials of an adhesive layer according to the following weight percentage: nitrile rubber 1072cgj 50.5%, ion scavenger IXE-100.5%, antioxidant G200.5%, accelerator EVERRNOX-10.5%, bisphenol resin E-12 (604) 48%;
s2, mixing the raw materials of the adhesive layer in the step S1, dispersing for 5 hours by using a high-speed dispersion machine, keeping the temperature at 30 ℃ by using a constant-temperature water tank, rotating at 1000r/min, and filtering by using a filter screen with the diameter of 8 mu m after the dispersion is finished to obtain an adhesive liquid;
s3, covering one surface of a substrate film CPI with a transparent protective film KNQ-LD150 film, coating the adhesive liquid in the step S2 on the other surface of the substrate film CPI, baking by adopting a tunnel type baking oven, wherein the tunnel type baking oven is divided into six sections, the temperatures of the sections are 60 ℃, 80 ℃, 160 ℃ and 60 ℃, the air inlet frequencies of the sections are 25Hz, 20Hz and 25Hz, the air exhaust frequencies are 40Hz, and drying is carried out to obtain a semi-finished product substrate with an adhesive layer on the surface;
and S4, covering a blue protective film KNQ-LD90 film on the adhesive layer of the semi-finished product substrate in the step S3, detecting the OLED supporting film through an online detection device, and obtaining the OLED supporting film after the detection is qualified.
Comparative example 2
The preparation process of the OLED support film comprises the following steps of:
step S1, preparing a treatment layer raw material according to the following weight percentage: 24% of zirconium oxide, 15% of 3-methyl-2-pentanone, 12% of methyl ether, 15% of 1-methoxy-2-propanol, 12% of cyclohexanone, 2200.5% of CMC, and 0.5% of pentaerythritol triacrylate;
s2, mixing the raw materials of the treatment layer in the step S1, dispersing for 3 hours by using a high-speed dispersion machine, keeping the temperature at 25 ℃ by using a constant-temperature water tank, rotating at 1000r/min, filtering by using a filter screen with the diameter of 8 mu m after the dispersion is finished, and standing for 2 hours to obtain a treatment layer liquid;
s3, covering one surface of a substrate film CPI with a transparent protective film KNQ-LD150 film, coating the treatment layer liquid in the step S2 on the other surface of the substrate film CPI, and baking by adopting a tunnel type baking oven, wherein the tunnel type baking oven is divided into six sections, the temperature of each section is 60 ℃, 80 ℃, 160 ℃, 60 ℃, the air inlet frequency of each section is 25Hz, 20Hz and 25Hz, and the air exhaust frequency is 40Hz, so as to obtain a first semi-finished product substrate with a treatment layer on the surface;
s4, preparing the raw materials of the adhesive layer according to the following weight percentage: 30% of nitrile rubber 1072cgx, 0.5% of ion scavenger IXE-100, 0.5% of antioxidant G, 10% of accelerator EVERRNOX-10 and 68% of bisphenol resin E-20 (601);
step S5, mixing the raw materials of the adhesive layer in the step S4, dispersing for 5 hours by using a high-speed dispersion machine, maintaining the temperature at 30 ℃ by using a constant-temperature water tank, rotating at 1000r/min, and filtering by using a filter screen with the size of 8 mu m after the dispersion is finished to obtain an adhesive liquid;
s6, coating the adhesive liquid in the step S5 on a treatment layer of the first semi-finished product base material in the step S3, baking by adopting a tunnel type oven, wherein the tunnel type oven is divided into six sections, the temperatures of the sections are 60 ℃, 80 ℃, 160 ℃, 60 ℃, the air inlet frequencies of the sections are 25Hz, 20Hz and 25Hz in sequence, and the air exhaust frequencies are 40Hz, and drying is carried out to obtain a second semi-finished product base material with an adhesive layer on the surface;
and S7, covering a blue protective film KNQ-LD90 film on the adhesive layer of the second semi-finished product substrate in the step S4, detecting the OLED support film through an online detection device, and obtaining the OLED support film after the detection is qualified.
Test examples
The OLED support films of examples 1 to 3 and comparative examples 1 to 2 were subjected to performance tests, and the specific test results are shown in table 1.
TABLE 1
As can be seen from the results in Table 1, the OLED support films of examples 1-3 of the present invention have high transparency, low haze, high bending resistance and high peel strength at high temperature (100 ℃). In the preparation process, the treatment layer is coated on the base film layer firstly, so that the tensile property of the base film can be enhanced, and the base film has better bending resistance. The OLED support film in comparative example 1 does not include a treatment layer, and as is apparent from the data in table 1, the number of times the OLED support film in comparative example 1 is bent is reduced by 33.3% as compared to example 1, and the tensile value and the elongation at break are significantly reduced. The content of nitrile butadiene rubber in the adhesive layer of the OLED support film in comparative example 2 is reduced, and the content of bisphenol resin is increased, and it can be seen from the data in table 1 that the high-temperature (100 ℃) peel strength of the OLED support film in comparative document 2 is significantly reduced compared to that of examples 1 and 2, and the performance of other OLED support films is also reduced to a different extent.
The OLED support film prepared by the preparation process of the OLED support film provided by the invention is more transparent and has lower haze, and the problems of poor bending resistance and reduced viscosity of an adhesive in a high-temperature environment of the conventional common OLED support film are effectively solved.
In one embodiment, the OLED support film is detected by an online detection method, and the online detection device comprises the following modules:
an image acquisition module: comprises a CCD industrial camera for collecting the image of the supporting film;
a calculation module: carrying out gray scale calculation processing on a support film image acquired by a CCD industrial phase;
an analysis control module: and comparing the threshold value of the calculation result, judging whether the OLED supporting film has defects or not, and controlling whether the production line runs or not.
The OLED supporting film online detection device performs the following operations:
(1) The image acquisition module adopts a CCD industrial camera and matched software to acquire images of the OLED supporting film according to a set time interval;
(2) The calculation module performs graying calculation processing on the collected OLED support film by utilizing a median filtering algorithm to obtain a first grayed image f (x, y), wherein the gray level of a pixel of the first grayed image f (x, y) is L, and the probability of the occurrence of the gray pixel of the ith (i belongs to 0,2, \ 8230;, L-1) level is k i ；
(3) Information entropy H of pixel block AxA in acquired image A And (3) calculating:
wherein, p and q are the minimum value and the maximum value of the gray value in the pixel block;
(4) Calculating the dispersion degree alpha of the gray value of the pixel block AxA in the acquired image:
wherein M is the number of pixels in the pixel block, y i Is the gray value of the i-th pixel,
is the gray level mean of the pixel block;
(5) Respectively setting threshold values T A And T α When the information entropy H is calculated A ≤T A And alpha is less than or equal to T α And if the quality of the OLED supporting film is judged to be qualified, the production line normally works, otherwise, the quality of the OLED supporting film is judged to be unqualified, and the control module sends an instruction to the production line controller to stop working.
The invention has the beneficial effects that: according to the invention, the quality of the OLED supporting film is detected on line by using an on-line detection technology based on an image technology, the image of the produced OLED supporting film is collected by an image collecting module, and then whether the quality of the OLED supporting film is qualified or not is judged by a calculating module and an analyzing module. According to the invention, the background in the OLED support film image is weakened by using a method of combining the local information entropy and the local gray value dispersion, the image quality is improved, the influence on feature extraction is reduced, the detection precision and speed are improved, and the online rapid detection of the OLED support film is realized.
Finally, it should be noted that: the above-mentioned embodiments only express several embodiments of the present invention, and do not limit the present invention, and it should be understood that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the concept of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The preparation process of the OLED support film is characterized in that the OLED support film comprises a transparent protective film, a base film layer, a processing layer, an adhesive layer and a blue protective film, and comprises the following steps:
step S1, preparing a treatment layer raw material according to the following weight percentage: 20-30% of zirconium oxide, 10-20% of 3-methyl-2-pentanone, 10-20% of aliphatic solvent, 10-20% of 1-methoxy-2-propanol, 10-20% of cyclohexanone, 10-30% of photosensitive resin and 0.5-1% of pentaerythritol triacrylate;
s2, mixing the raw materials of the treatment layer in the step S1, dispersing for 1-3h by using a high-speed dispersion machine, maintaining the temperature at 25-30 ℃ by using a constant-temperature water tank, rotating at the speed of 800-1200r/min, filtering by using a filter screen with the diameter of 5-10 mu m after dispersion is finished, and standing for 2h to obtain a treatment layer liquid;
s3, covering a transparent protective film on one surface of a base material film, coating the treatment layer liquid in the step S2 on the other surface of the base material film, baking by adopting a tunnel type oven, and drying to obtain a first semi-finished base material with a treatment layer on the surface;
s4, preparing raw materials of the adhesive layer according to the following weight percentage: 38-60% of rubber, 0.5-1% of ion scavenger, 0.5-1% of antioxidant, 0.5-1% of accelerator and 38-60% of bisphenol resin;
s5, mixing the raw materials of the adhesive layer in the step S4, dispersing for 3-5h by using a high-speed dispersion machine, maintaining the temperature at 25-30 ℃ by using a constant-temperature water tank, rotating at the speed of 800-1200r/min, and filtering by using a 5-10 mu m filter screen after dispersion is finished to obtain an adhesive liquid;
s6, coating the adhesive liquid in the step S5 on the treatment layer of the first semi-finished product base material in the step S3, baking by adopting a tunnel type oven, and drying to obtain a second semi-finished product base material with an adhesive layer on the surface;
and S7, covering a blue protective film on the adhesive layer of the second semi-finished product substrate in the step S6, detecting the OLED support film through an online detection device, and obtaining the OLED support film after the detection is qualified.
2. The process for preparing OLED support film according to claim 1, wherein the base film layer is any one of PET, liquid transparent PI, CPI, PEN and PA, has a thickness of 12.5-125 μm, and has a transmittance of > 90%.
3. The process for preparing the OLED support film according to claim 1, wherein the transparent protective film is a KNQ-LD150 thin film produced by Shenzhenjinko Nuoqiao science and technology Limited and has a thickness of 25-125 μm.
4. The process for preparing the OLED support film according to claim 1, wherein the blue protective film is a KNQ-LD90 thin film produced by Shenzhenjinko Keno bridge science and technology Limited and has a thickness of 25-125 μm.
5. The process for preparing an OLED support film according to claim 1, wherein the thickness of the treatment layer is from 5 to 15 μm.
6. The process for preparing an OLED support film according to claim 1, characterized in that the thickness of the adhesive layer is 5 to 50 μm.
7. The process for preparing the OLED supporting film according to claim 1, wherein the aliphatic solvent in step S1 is methyl ether;
the photosensitive resin was CMC2200.
8. The process for preparing the OLED supporting film according to claim 1, wherein the rubber in the step S4 is one or a mixture of two of nitrile rubbers 1072cgj and 1072 cgx;
the ion trapping agent is IXE-100;
the antioxidant is G200 or L1010;
the promoter is EVERRNOX-10;
the bisphenol transparent resin is one or a mixture of two of E-12 (604) and E-20 (601).
9. The preparation process of the OLED support film according to claim 1, wherein the tunnel oven in the steps S3 and S6 is divided into six sections, and the temperature of each section is 60 ℃, 80 ℃, 160 ℃ and 60 ℃ in sequence; the wind frequency of each air-saving inlet is 25Hz, 20Hz and 25Hz in sequence; the air frequency of the exhaust air is 40Hz.
10. The process for preparing an OLED supporting film according to claim 1, wherein the on-line detection device in step S7 comprises the following modules:
an image acquisition module: comprises a CCD industrial camera for collecting the image of the supporting film;
a calculation module: carrying out gray scale calculation processing on a support film image acquired by a CCD industrial phase;
an analysis control module: and comparing the calculated results with a threshold value, judging whether the OLED supporting film has defects or not, and controlling whether the production line runs or not.
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| US20110005656A1 (en) * | 2008-04-14 | 2011-01-13 | Nitto Denko Corporation | Optical display device manufacturing system and optical display device manufacturing method |
| WO2020103324A1 (en) * | 2018-11-20 | 2020-05-28 | 深圳市维图视技术有限公司 | On-line mask detection system and method |
| CN111826103A (en) * | 2019-11-06 | 2020-10-27 | 深圳科诺桥科技股份有限公司 | Transparent cover film and preparation method thereof, flexible circuit board and LED transparent screen |
| CN113850809A (en) * | 2021-12-01 | 2021-12-28 | 武汉飞恩微电子有限公司 | Method for detecting appearance defects of protective film of chip resistor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110005656A1 (en) * | 2008-04-14 | 2011-01-13 | Nitto Denko Corporation | Optical display device manufacturing system and optical display device manufacturing method |
| WO2020103324A1 (en) * | 2018-11-20 | 2020-05-28 | 深圳市维图视技术有限公司 | On-line mask detection system and method |
| CN111826103A (en) * | 2019-11-06 | 2020-10-27 | 深圳科诺桥科技股份有限公司 | Transparent cover film and preparation method thereof, flexible circuit board and LED transparent screen |
| CN113850809A (en) * | 2021-12-01 | 2021-12-28 | 武汉飞恩微电子有限公司 | Method for detecting appearance defects of protective film of chip resistor |
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