Polaroid recessive defect identification method

Abstract

The invention discloses a method for identifying hidden and bad polaroids, which comprises the following steps of: 1, cutting a polaroid roll material into M rows of polaroid sheets along the transverse direction based on the length and the width of a target polaroid, and respectively jet-printing M different spray code identifiers on the M rows of polaroid sheets, n same code spraying identifications are sprayed and printed on each row of polaroid sheets, and M and N are natural numbers larger than 1; and 2, cutting the M rows of polaroid sheets into N columns at equal intervals along the longitudinal direction, wherein M target polaroids containing different code spraying identifications are obtained in each column. The method can detect the poor regularity of the polaroid in the absorption axis direction, is simple to operate, effectively reduces the loss, reduces the investment of manpower and material resources, and is low in cost, high in detection accuracy and high in efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of polarizer processing. Background Art

[0002] As global demand for mobile phone panels increases, polarizers, one of the three major components of LCDs, are frequently shipped to major panel and module customers. Complaints arise from a high rate of latent defects along the POL stretching direction, making it impossible to effectively sort and identify defective products, leading to production stoppages.

[0003] In the industry, inkjet markings on polarizers are typically identical. If a batch of defective products occurs, it's impossible to pinpoint the defective location, requiring batch inspection without a solution. This method is costly, requiring both human and material resources, and requiring batch inspection or re-inspection without the ability to intercept the defective products. This consumes significant human and material resources and is costly. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the existing technology and propose a method for identifying hidden defects in polarizers, which can find defective products in a timely and convenient manner, save a lot of manpower and material resources, and has low cost, high detection accuracy and high efficiency.

[0005] In order to solve the above technical problems, the present invention proposes the following technical solutions: A method for identifying latent defects in polarizers, comprising the following steps: Step 1: Based on the length and width of the target polarizer, cut the polarizer roll into M rows of polarizer sheets along the horizontal direction, print M different inkjet codes on each of the M rows of polarizer sheets, and print N identical inkjet codes on each row of polarizer sheets, where M and N are both natural numbers greater than 1; Step 2: Cut the M rows of polarizer sheets into N columns at equal distances along the longitudinal direction, and obtain M target polarizers with different inkjet markings in each column.

[0006] The above technical solution is further limited in that: if an abnormal target polarizer is detected, all target polarizers having the same inkjet marking as the abnormal target polarizer are eliminated.

[0007] The above technical solution is further limited in that: the width of the polarizer roll includes 1490nm, the number M is 1490 / B, and B is the width of the target polarizer.

[0008] The above technical solution is further limited in that: the method further includes the following steps: after converting the coding mark into a BMP format image, inputting it into the coding device for coding.

[0009] A further limitation of the above technical solution is that the widths of all rows of polarizer sheets are the same.

[0010] The above technical solution is further limited in that: the inkjet marking includes the inkjet characters of each target polarizer.

[0011] The above technical solution is further limited in that: the number of M is 7.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the polarizer roll is cut into M rows of polarizer sheets, and then the M rows of polarizer sheets are cut into N columns, so as to obtain M times N target polarizers, each target polarizer is spray-printed with a coding mark, and all the coding marks on each row of polarizer sheets are the same, and the coding marks on polarizer sheets in different rows are different. When an abnormal target polarizer is found, the coding mark on the abnormal target polarizer can be seen with the naked eye, and then all target polarizers containing the same coding mark as the abnormal target polarizer are eliminated. The present invention can detect the poor regularity of the polarizer in the absorption axis direction, is simple to operate, effectively reduces losses, reduces the investment of manpower and material resources, has low cost, high detection accuracy, and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the polarizer roll of the present invention.

[0014] Figure 2 It is a diagram of the first coding mark of the present invention.

[0015] Figure 3 It is a diagram of the second coding mark of the present invention.

[0016] Figure 4 It is a diagram of the third coding mark of the present invention.

[0017] Figure 5 It is a diagram of the fourth coding mark of the present invention.

[0018] Figure 6 It is a diagram of the fifth coding mark of the present invention.

[0019] Figure 7 It is a diagram of the sixth coding mark of the present invention.

[0020] Figure 8 It is a diagram of the seventh coding mark of the present invention.

[0021] Figure 9 This is the picture after the polarizer roll is printed with the inkjet code logo.

[0022] Figure 10 This is the picture after the polarizer roll is printed with the inkjet code logo (the solid line is the edge of the target polarizer).

[0023] Figure 11 This is a picture of the cut target polarizer. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without making any creative work are all within the scope of protection of the present invention.

[0025] See also Figures 1 to 11 The present invention provides a method for identifying a latent defective polarizer, which comprises the following steps: Step 1: Use a computing device (such as a desktop computer, laptop computer, tablet computer or smart phone, etc.) to create seven BMP format images (not shown) through the spreadsheet software EXCEL or the "Paint" software that comes with the Windows system. The contents of these seven BMP format images are seven different inkjet coding logos, namely the first inkjet coding logo 21, the second inkjet coding logo 22, the third inkjet coding logo 23, the fourth inkjet coding logo 24, the fifth inkjet coding logo 25, the sixth inkjet coding logo 26 and the seventh inkjet coding logo 27. Import the above seven BMP format images into the inkjet coding program of the polarizer inkjet coding device.

[0026] Step 2: Based on the length and width of the target polarizer 100, the polarizer roll 1 is cut into seven rows of polarizer sheets of the same width along the horizontal direction, namely the first polarizer sheet 11, the second polarizer sheet 12, the third polarizer sheet 13, the fourth polarizer sheet 14, the fifth polarizer sheet 15, the sixth polarizer sheet 16 and the sixth polarizer sheet 17, and the seven kinds of inkjet coding logos are printed on the seven rows of polarizer sheets, namely the first polarizer sheet 11, the second polarizer sheet 12, the third polarizer sheet 13, the fourth polarizer sheet 14, the fifth polarizer sheet 15, the sixth polarizer sheet 16 and the sixth polarizer sheet 17. The first inkjet coding mark 21, the second inkjet coding mark 22, the third inkjet coding mark 23, the fourth inkjet coding mark 24, the fifth inkjet coding mark 25, the sixth inkjet coding mark 26 and the seventh inkjet coding mark 27 are printed on the polarizer sheet 14, the fifth polarizer sheet 15, the sixth polarizer sheet 16 and the sixth polarizer sheet 17. At least two identical inkjet coding marks are printed on each row of polarizer sheets, such as printing multiple first inkjet coding marks 21 on the first polarizer sheet 11, and printing multiple second inkjet coding marks 22 on the second polarizer sheet 12.....

[0027] The above seven inkjet coding logos, namely the first inkjet coding logo 21, the second inkjet coding logo 22, the third inkjet coding logo 23, the fourth inkjet coding logo 24, the fifth inkjet coding logo 25, the sixth inkjet coding logo 26 and the seventh inkjet coding logo 27 are different from each other. The specific difference is that there are missing dots at different positions of the inkjet coding character "WA".

[0028] Step 3: Cut the seven rows of polarizer sheets into at least two columns along the longitudinal direction, and obtain seven target polarizers with different inkjet coding marks in each column, that is, the seven target polarizers in each column respectively have a first inkjet coding mark 21, a second inkjet coding mark 22, a third inkjet coding mark 23, a fourth inkjet coding mark 24, a fifth inkjet coding mark 25, a sixth inkjet coding mark 26 and a seventh inkjet coding mark 27.

[0029] Step 4: If an abnormal target polarizer is detected, all target polarizers having the same inkjet marking as the abnormal target polarizer are eliminated.

[0030] In actual production, the width of the polarizer roll is 1490nm, which is cut into seven rows of polarizer sheets. The width of each row of polarizer sheets is 1490nm / B, where B is the width of the target polarizer.

[0031] The present invention has the following beneficial effects: the polarizer roll 1 is cut into seven rows of polarizer sheets, and then the seven rows of polarizer sheets are cut into at least two columns, to obtain a large number of target polarizers 100, each target polarizer 100 has a spray code mark printed on it, and all the spray code marks on each row of polarizer sheets are the same, and the spray code marks on polarizer sheets in different rows are different. When an abnormal target polarizer 100 is found, the spray code mark on the abnormal target polarizer 100 can be seen with the naked eye, and then all target polarizers 100 containing the same spray code mark as the abnormal target polarizer 100 are eliminated. The present invention can detect poor regularity of polarizers in the absorption axis direction, is simple to operate, effectively reduces losses, reduces the investment of manpower and material resources, has low cost, high detection accuracy, and high efficiency.

[0032] As a variation of the first embodiment, the spreadsheet software may also be ONLYOFFICE spreadsheet editor, Google Sheets, Apple Numbers, Zoho Sheet, LibreOffice Calc, and other software.

[0033] As a variation of the first embodiment, the drawing software may also include Adobe Photoshop, Adobe Illustrator, Sketch, Figma, CorelDRAW, Affinity Designer, InDesign, Canva, and the like.

[0034] The basic principles, main features, and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention claimed.

Claims

1. A method for identifying latent defects in polarizers, characterized by: The steps include: Step 1: Based on the length and width of the target polarizer, cut the polarizer roll into M rows of polarizer sheets along the horizontal direction, print M different inkjet codes on each of the M rows of polarizer sheets, and print N identical inkjet codes on each row of polarizer sheets, where M and N are both natural numbers greater than 1; Step 2: Cut the M rows of polarizer sheets into N columns at equal distances along the longitudinal direction, and obtain M target polarizers with different inkjet markings in each column.

2. The method for identifying latent defects in polarizers according to claim 1, wherein: If an abnormal target polarizer is detected, all target polarizers having the same inkjet marking as the abnormal target polarizer are removed.

3. The method for identifying latent defects in polarizers according to claim 1, wherein: The width of the polarizer roll includes 1490nm, and the number M is 1490nm / B, where B is the width of the target polarizer.

4. The method for identifying latent defects in polarizers according to claim 1, wherein: The method further comprises the following steps: converting the coding mark into a BMP format image and inputting the image into a coding device for coding.

5. The method for identifying latent defects in polarizers according to claim 1, wherein: All rows of polarizer sheets have the same width.

6. The method for identifying latent defects in polarizers according to claim 1, wherein: The inkjet marking includes inkjet characters of each target polarizer.

7. The method for identifying latent defects in polarizers according to claim 1, wherein: The number of M is 7.

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