Anti-forge anti-theft library managing device for audio-visual CD

Abstract

The present invention is characterized by making radio-frequency identification (RFID) system be used in digital video disc so as to attain the functions of resisting counterfeit, resisting theft and making inventory control. The invented equipment for implementing above-mentioned functions includes an optical disk, it includes a first ring zone, a second ring zone and a third ring zone, in which said second ring zone is a data recorded zone containing metal recording layer, and the first ring zone and third ring zone are dataless zones; a radio-frequency identification (RFID) chip, it is embedded in said optical disk; and an antenna, it is combined in said optical disk; in which said RFID chip and said antenna are placed in third ring zone. In said device a folding matching circuit can be added, can be used for providing inductive resistance value of antenna so as to shorten the length of antenna.

Description

technical field [0001] The invention relates to a device for anti-counterfeiting, anti-theft and inventory management of audio-visual discs, especially the application of radio frequency identification (RFID) systems in the field of wireless communication, that is to say, the invention relates to the use of radio frequency The identification system is applied to anti-counterfeiting, anti-theft and inventory management devices for audio-visual discs. Background technique [0002] RFID has the advantages of non-contact reading, data update, large storage capacity, reusability, multiple identification tags can be read at the same time, and good data security. It can not only replace the currently used barcode (Bar-code) Information identification system, and it does not require manual intervention when performing identification work, and can be used in harsh environments with oil stains and high dust. [0003] The flooding of CDs, VCDs, CD-ROMs, DVDs and other audio-visual cou...

AI Technical Summary

Problems solved by technology

[0004] The technology of embedding radio frequency identification (RFID) tags into audio-visual discs is mostly to embed the tags in the blank area of ​​the central ring of the disc at present. Known technologies such as US 2003 / 0034400A1, US 2004 / 0054594 A1, and US 2004 / 0052202 A1 Most of them use the blank area of ​​the central ring to embed the tag in this area. Although this design method has a larger RFID tag embedding space and can reduce the occurrence of high-speed rotation balance problems, in application, the scanner and the tag The reading distance between them will be limited by the shading effect caused by the metal and quantity of the disc itself, which will affect the radiation pattern of the tag antenna, resulting in an extremely short reading distance

[0005] In addition, since the input impedance of the RFID chip presents a large capacitive property, the length of the simple dipole antenna used in the known technology needs to be greater than 1 wavelength to provide a large inductive property.

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