A polarizer automatic optical detection defect printing system and a printing method thereof

Abstract

The application discloses a kind of polarizing sheet automatic optical detection defect printing system and its printing method, the system includes AOI extension station optical detection system, SA-P extension station two-dimensional code printing system, AOI coating station optical detection system, CA-P1 coating station defect integrated printing system and CA-P2 coating station defect printing system, through AOI extension station optical detection system, SA-P extension station two-dimensional code printing system, CA-P1 coating station defect integrated printing system, CA-P2 coating station defect printing system cooperation, when the surface defect detection of polarizing sheet roll cutting into sheet is carried out, different types of defects on polarizing sheet can be printed with different seals, which is beneficial to workers to quickly and efficiently pick out defective products according to the seals on the surface of polarizing sheet film, can save a lot of detection labor and reduce the misjudgment caused by artificial eye fatigue, and then the efficiency and effect of polarizing sheet defect detection can be improved.

Description

Technical Field

[0001] This invention relates to the field of detection system technology, specifically to an automatic optical inspection and printing system for polarizer defects and its printing method. Background Technology

[0002] The full name of a polarizer is polarizing film, which is one of the most critical components of an LCD panel. A polarizer is usually composed of a PET protective film, an upper TAC film, a polarizing film, a lower TAC film, a PSA pressure-sensitive adhesive, and a PET release film. The polarizing film and the TAC film are bonded together with water-soluble polyvinyl alcohol adhesive. Appearance defects may occur at various stages of its manufacturing process.

[0003] With the further development of the information age and the widespread application of intelligent display devices, the quality requirements for screen resolution and contrast are constantly increasing, thus placing even stricter demands on the high display quality of polarizers. Due to various production factors, polarizers can develop various types of surface defects, and these surface defects are one of the most important indicators of polarizer quality. Therefore, after the roll material is cut into sheets, each polarizer sheet undergoes surface defect inspection, which requires a significant amount of manual labor to inspect each sheet individually.

[0004] However, during the inspection process, human eye fatigue and other factors can cause false positives and false negatives, which ultimately affect the product yield. Therefore, there is an urgent need to provide an automated inspection method to improve the efficiency and accuracy of polarizer defect detection. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic optical inspection and defect printing system for polarizers and a printing method thereof, solving the following technical problems:

[0006] How to improve the detection efficiency and effectiveness of polarizer defects.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] In a first aspect, the present invention discloses an automatic optical inspection and defect printing system for polarizers, comprising:

[0009] The AO I extension station optical inspection system is used to detect defects on the original and reverse surfaces of polarizers and then send relevant defect information.

[0010] The SA-P extension station QR code printing system is used to receive relevant defect information from the AO I extension station optical inspection system and command the QR code printer to print the meter number and the QR code corresponding to the defect coordinates of the current meter number at the same spacing on the edge area of ​​the transparent film on the original DS side of the polarizer.

[0011] The AO I coating station optical inspection system is used to detect surface defects of the polarizer after it is bonded with the PET release film and send relevant defect information.

[0012] The CA-P1 coating station defect integration printing system receives relevant defect information 2 from the AO I coating station optical inspection system. Simultaneously, the QR code reader in the CA-P1 coating station defect integration printing system reads the QR code printed on the edge area of ​​the transparent film on the original DS side of the polarizer by the QR code printer in the SA-P extension station QR code printing system, thus obtaining relevant defect information 1. Different stamp types are set according to different defects, and the relevant printing information is sent after integration.

[0013] The CA-P2 coating station defect printing system receives relevant printing information sent by the CA-P1 coating station defect integration printing system and prints different stamps on the defective film surface according to different defects.

[0014] In a further embodiment of the present invention: the AO I extension station optical inspection system transmits relevant defect information to the SA-P extension station QR code printing system via a network through a detection channel.

[0015] In a further embodiment of the present invention: the content printed by the SA-P extension station QR code printing system also includes the roll batch number.

[0016] In a further embodiment of the present invention: the AO I coating station optical inspection system transmits the relevant defect information to the CA-P1 coating station defect integration inkjet printing system via a network through a detection channel.

[0017] In a further embodiment of the present invention: the polarizer is obtained by laminating and drying a TAC film and a PVA film.

[0018] In a further embodiment of the present invention: the polarizer bonded to the PET release film is:

[0019] The polarizing film printed by the QR code inkjet printing system at the SA-P extension station is transferred to the coating station for unwinding production. The original reflective film of the polarizing film is then laminated with the coated and dried PET release film.

[0020] In a further embodiment of the present invention: the printing information sent by the CA-P1 coating station defect integration printing system includes printing data formed by defect name, size, and specified type.

[0021] In a further embodiment of the present invention: the CA-P2 coating station defect printing system prints stamps of different colors on the defect locations reflected by the relevant defect information one and the relevant defect information two.

[0022] In a further embodiment of the present invention: when the CA-P2 coating station defect printing system fails to print, it will print failure information in the transparent area of ​​the film and calculate the printing success rate.

[0023] Secondly, the present invention also discloses a printing method for the automatic optical inspection defect printing system for polarizers as described above, comprising the following steps:

[0024] S1; The polarizer is inspected for surface defect information 1 by the AO I extension station optical inspection system, and the surface defect information 1 is sent to the SA-P extension station QR code printing system;

[0025] S2: After reading the surface defect information, the SA-P extension station QR code printing system commands the QR code printer to print the meter number and the QR code corresponding to the defect coordinates on the edge of the transparent film on the original DS side of the polarizer at equal intervals.

[0026] S3: The polarizer is transferred to the coating station for unwinding production. The original reflective film of the polarizer is bonded to the coated and dried PET release film. Then, the surface defect information 2 is detected by the AOI coating station optical inspection system and sent to the CA-P1 coating station defect integration inkjet printing system.

[0027] S4: The CA-P1 coating station defect integration inkjet printing system reads surface defect information 2, and at the same time reads the QR code printed on the edge area of ​​the transparent film on the original DS side of the polarizer by the QR code inkjet printer of the SA-P extension station QR code inkjet printing system through the QR code reader of the CA-P1 coating station defect integration inkjet printing system, thus obtaining relevant defect information 1; different stamp types are set according to different defects, and the relevant inkjet printing information is sent to the CA-P2 coating station defect inkjet printing system after integration.

[0028] S5: After reading the relevant printing information sent by the CA-P1 coating station defect integration printing system, the CA-P2 coating station defect printing system prints different stamps on the defective film surface according to different defects.

[0029] The beneficial effects of this invention are:

[0030] This invention utilizes the AO I extension station optical inspection system, SA-P extension station QR code printing system, A-P1 coating station defect integration printing system, and CA-P2 coating station defect printing system to work together. This allows for the printing of different stamps on different types of defects on the polarizer after it has been cut into sheets. This enables workers to quickly and efficiently remove defective products based on the stamps on the polarizer film, saving a significant amount of manpower and reducing false detections due to human eye fatigue. Consequently, it improves the efficiency and effectiveness of polarizer defect detection. Attached Figure Description

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] Figure 1 This is a flowchart of an automatic optical inspection and defect printing system for polarizers according to the present invention;

[0033] Figure 2 This is a schematic diagram of the operation of the SA-P extension station QR code printing system in an automatic optical inspection defect printing system for polarizers according to the present invention.

[0034] Figure 3 This is a schematic diagram of the CA-P1 coating station defect integration printing system in an automatic optical inspection and defect printing system for polarizers in this invention.

[0035] Figure 4 This is a schematic diagram of the CA-P2 coating station defect printing system in an automatic optical inspection and defect printing system for polarizers in this invention.

[0036] Figure 5 This is a data flow diagram of the CA-P2 coating station defect printing system in an automatic optical inspection and defect printing system for polarizers according to the present invention. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1

[0039] Please see Figure 1 As shown, the present invention is an automatic optical inspection and defect printing system for polarizers, comprising:

[0040] The AO I extension station optical inspection system is used to detect defects on the original and reverse surfaces of a polarizer obtained after the TAC film and PVA film are bonded and dried, and then send relevant defect information.

[0041] The SA-P extension station QR code printing system is used to receive relevant defect information from the AO I extension station optical inspection system and command the QR code printer to print the roll batch number, length in meters, and QR codes with defect coordinates corresponding to the current length in the transparent film edge area on the original DS side of the polarizer at equal intervals.

[0042] The AO I coating station optical inspection system is used to detect surface defects of the polarizer after it is laminated with the PET release film and send relevant defect information. The polarizer after lamination with the PET release film is obtained by the following method: the polarizer printed by the QR code inkjet printing system of the SA-P extension station is transferred to the coating station for unwinding production, and the original reflective film of the polarizer is laminated with the coated and dried PET release film.

[0043] The CA-P1 coating station defect integration printing system receives relevant defect information from the AO I coating station optical inspection system. Simultaneously, it reads the QR code printed on the edge area of ​​the transparent film on the original DS side of the polarizer by the QR code printer of the SA-P extension station QR code printing system through the QR code reader of the CA-P1 coating station defect integration printing system, thus obtaining relevant information. Different stamp types are set according to different defects, and the relevant printing information is sent after integration.

[0044] The CA-P2 coating station defect printing system receives relevant printing information sent by the CA-P1 coating station defect integration printing system and prints different stamps on the defective film surface according to different defects.

[0045] Furthermore: the AO I extension station optical inspection system transmits relevant defect information one to the SA-P extension station QR code printing system via the network through the detection channel; the AO I coating station optical inspection system transmits relevant defect information two to the CA-P1 coating station defect integration printing system via the network through the detection channel.

[0046] Furthermore: The CA-P1 coating station defect integration printing system obtains relevant defect information one and relevant defect information two, and sends printing information including the printing data formed by the defect name, size, and specified type.

[0047] Furthermore, the CA-P2 coating station defect printing system prints different colored stamps on the defect locations reflected by the relevant defect information one and the relevant defect information two.

[0048] Furthermore, the CA-P2 coating station defect printing system will print failure information in the transparent area of ​​the film when printing fails, and will also calculate the printing success rate.

[0049] Example 2

[0050] Please see Figure 2-5 This embodiment describes the printing method of the automatic optical inspection defect printing system for polarizers in Embodiment 1, which includes the following steps:

[0051] S1; The polarizer is inspected for surface defect information 1 by the AO I extension station optical inspection system, and the surface defect information 1 is sent to the SA-P extension station QR code printing system;

[0052] S2: After reading the surface defect information, the SA-P extension station QR code printing system commands the QR code printer to print the roll batch number, length in meters, and QR codes with corresponding defect coordinates for the current length in the transparent film edge area on the original DS side of the polarizer at equal intervals.

[0053] S3: The polarizer is transferred to the coating station for unwinding production. The original reflective film of the polarizer is bonded to the coated and dried PET release film. Then, the surface defect information 2 is detected by the AO I coating station optical inspection system and sent to the CA-P1 coating station defect integration inkjet printing system.

[0054] S4: The CA-P1 coating station defect integration inkjet printing system reads surface defect information 2, and at the same time reads the QR code printed on the edge area of ​​the transparent film on the original DS side of the polarizer by the QR code inkjet printer of the SA-P extension station QR code inkjet printing system through the QR code reader of the CA-P1 coating station defect integration inkjet printing system, thus obtaining relevant defect information 1; different stamp types are set according to different defects, and the relevant inkjet printing information is sent to the CA-P2 coating station defect inkjet printing system after integration.

[0055] S5: After reading the relevant printing information sent by the CA-P1 coating station defect integration printing system, the CA-P2 coating station defect printing system prints different stamps on the defective film surface according to different defects.

[0056] The following will illustrate this with a specific case.

[0057] When the production line is running normally, the automatic optical inspection and defect printing system for polarizers is activated, and its printing steps are as follows:

[0058] Step 1: As Figure 2 As shown, in the extension station, after the TAC film and PVA film are bonded and dried, a polarizer is obtained. The AO I extension station optical inspection system performs defect detection on the operating polarizer and transmits the defect detection information to the SA-P extension station QR code printing system through the network via the detection channel. After reading the surface defect information, the SA-P extension station QR code printing system commands the QR code printer to print the roll batch number, length in meters, and QR codes with defect coordinates corresponding to the current length in the transparent film edge area on the original reverse DS side of the polarizer at equal intervals. The system also sets up a QR code reader to read the system's printing information for comparison. When an abnormality is detected, an alarm notification is issued and the entire roll reading rate is recorded.

[0059] Step 2: As Figure 3As shown, after each roll of polarizing film is produced at the extension station, it is transferred to the coating station for continued production. The original reflective film of the polarizing film is bonded to the coated and dried PET release film. Then, the surface defect information is detected by the AOI coating station optical inspection system and sent to the CA-P1 coating station defect integration inkjet printing system. The CA-P1 coating station defect integration inkjet printing system reads the surface defect information and simultaneously reads the QR code printed on the edge area of ​​the transparent film on the original reflective DS side of the polarizing film by the QR code inkjet printer of the SA-P extension station QR code inkjet printing system, thus obtaining the relevant defect information. Different stamp types are set according to different defects, and the defect information from the extension station and the coating station is integrated and sent to the CA-P2 coating station defect inkjet printing system.

[0060] Step 3: As Figure 4 As shown, after the CA-P2 coating station defect printing system reads the relevant printing information sent by the CA-P1 coating station defect integrated printing system, it prints different stamps on the defective film surface according to different defects, and the stamps of the extension station and the coating station are different colors.

[0061] Step 4: As Figure 5 As shown, when defects are dense or printing fails, failure information is printed in the transparent area at the edge of the film and recorded.

[0062] Step 6: After the polarizing film roll production is completed and cured, it is sent to the film cutting machine to be cut into polarizing films of the size required by the customer. Then, through manual inspection, defective products can be easily removed according to the stamp, ensuring the pass rate of the shipped products.

[0063] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0064] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0065] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An automatic optical inspection and defect printing system for polarizers, characterized in that, include: The AOI extension station optical inspection system is used to detect defects on the original and reverse surfaces of polarizers and then send relevant defect information. The SA-P extension station QR code printing system is used to receive relevant defect information from the AOI extension station optical inspection system and command the QR code printer to print the meter number and the QR code corresponding to the defect coordinates on the edge area of ​​the transparent film on the original DS side of the polarizer at the same spacing. The AOI coating station optical inspection system is used to detect surface defects of the polarizer after it is bonded with the PET release film and send relevant defect information. The CA-P1 coating station defect integration printing system receives relevant defect information 2 from the AOI coating station optical inspection system. Simultaneously, the QR code reader in the CA-P1 coating station defect integration printing system reads the QR code printed on the edge area of ​​the transparent film on the original DS side of the polarizer by the QR code printer in the SA-P extension station QR code printing system, thus obtaining relevant defect information 1. Different stamp types are set according to different defects, and the relevant printing information is sent after integration. The CA-P2 coating station defect printing system is used to receive relevant printing information sent by the CA-P1 coating station defect integration printing system and print different stamps on the defective film surface according to different defects. The printing method of the automatic optical inspection and defect printing system for polarizers includes the following steps: S1; The polarizer is inspected for surface defect information 1 by the AOI extension station optical inspection system, and the surface defect information 1 is sent to the SA-P extension station QR code printing system. S2: After reading the surface defect information, the SA-P extension station QR code printing system commands the QR code printer to print the meter number and the QR code corresponding to the defect coordinates on the edge of the transparent film on the original DS side of the polarizer at equal intervals. S3: The polarizer is transferred to the coating station for unwinding production. The original reflective film of the polarizer is bonded to the coated and dried PET release film. Then, the surface defect information 2 is detected by the AOI coating station optical inspection system and sent to the CA-P1 coating station defect integration inkjet printing system. S4: The CA-P1 coating station defect integration inkjet printing system reads surface defect information 2, and at the same time reads the QR code printed on the edge area of ​​the transparent film on the original DS side of the polarizer by the QR code inkjet printer of the SA-P extension station QR code inkjet printing system through the QR code reader of the CA-P1 coating station defect integration inkjet printing system, thus obtaining relevant defect information 1; different stamp types are set according to different defects, and the relevant inkjet printing information is sent to the CA-P2 coating station defect inkjet printing system after integration. S5: After reading the relevant printing information sent by the CA-P1 coating station defect integration printing system, the CA-P2 coating station defect printing system prints different stamps on the defective film surface according to different defects.

2. The automatic optical inspection and defect printing system for polarizers according to claim 1, characterized in that, The AOI extension station optical inspection system transmits relevant defect information to the SA-P extension station QR code printing system via the network through the detection channel.

3. The automatic optical inspection and defect printing system for polarizers according to claim 1, characterized in that, The SA-P extension station QR code printing system also prints the roll batch number.

4. The automatic optical inspection and defect printing system for polarizers according to claim 1, characterized in that, The AOI coating station optical inspection system transmits relevant defect information to the CA-P1 coating station defect integration inkjet printing system via the network through the detection channel.

5. The automatic optical inspection and defect printing system for polarizers according to claim 1, characterized in that, The polarizer is obtained by laminating and drying a TAC film and a PVA film.

6. The automatic optical inspection and defect printing system for polarizers according to claim 1, characterized in that, The polarizer laminated with the PET release film is: The polarizing film printed by the QR code inkjet printing system at the SA-P extension station is transferred to the coating station for unwinding production. The original reflective film of the polarizing film is then laminated with the coated and dried PET release film.

7. The automatic optical inspection and defect printing system for polarizers according to claim 1, characterized in that, The printing information sent by the CA-P1 coating station defect integration printing system includes printing data formed by defect name, size, and specified type.

8. The automatic optical inspection and defect printing system for polarizers according to claim 1, characterized in that, The CA-P2 coating station defect printing system prints different colored stamps on the defect locations reflected by relevant defect information one and relevant defect information two.

9. The automatic optical inspection and defect printing system for polarizers according to claim 1, characterized in that, The CA-P2 coating station defect printing system prints failure information in the transparent area of ​​the film when printing fails, and also calculates the printing success rate.

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