Encrypted Anti-counterfeiting Printing Technology of Pseudo-random Signal Modulation Printed Matter Frequency Modulation Dot Spatial Position

Abstract

The invention discloses an encrypted anti-counterfeiting printing technology based on the pseudo-random signal modulation of the space position of the frequency-modulated dots in the mixed screening. The multi-ary quadrature phase shift modulation (QPSK) method embeds the anti-counterfeiting information in the entire page, which can identify the anti-counterfeiting information from any fragment when identifying printed matter. Scanners, electronic documents and other illegal duplication can be widely used in the field of printed matter anti-counterfeiting.

Description

Technical field: [0001] The invention relates to an anti-counterfeiting printing technology based on digital printed products, in particular to an encrypted anti-counterfeiting printing technology in which a pseudo-random signal modulates the spatial position of frequency-modulated dots of printed products. The anti-counterfeiting printing technology can be used for anti-counterfeiting of various printed products. Background technique: [0002] The existing relatively common anti-counterfeiting methods are as follows: The first is laser anti-counterfeiting marks, which use laser recessive ink fluorescent ink printing technology to print product logos or special identification patterns into product anti-counterfeiting labels. And the same type of product uses the same label, because the anti-counterfeiting label is easier to forge, and the fake anti-counterfeiting label is used on the counterfeit product, causing the product to be confused, so it is difficult to effectively pr...

AI Technical Summary

Problems solved by technology

[0002]The existing more common anti-counterfeiting methods are as follows: The first is laser anti-counterfeiting marks, which use laser hidden ink fluorescent ink printing technology to mark the product The anti-counterfeit label of the product is printed with the emblem or a special identification pattern, and the same kind of label is used for the same type of product, because the anti-counterfeit label is easier to forge, and the forged anti-counterfeit label is used on the counterfeit product, causing the product to be damaged. True and false are confused, so it is difficult to effectively prevent counterfeiting

The second is the password anti-counterfeiting label. The method adopted is to compile a set of numbers for each product, and the codes of each product are different. The numbers are printed on the labels and covered, and the numbers are stored Into the computer database that can be inquired by consumers. When consumers purchase products, they input the numbers on the logo into the computer database for comparison and identification through telephone or networked computers. The same is true, and the difference is false. Simple, easy to identify, not easy to forge, but in actual use, because the coded data is uniformly generated by the computer and printed on the label

In summary, the existing anti-counterfeiting methods have certain shortcomings, and thus cannot fundamentally prevent counterfeit products.

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