Information pattern carrier and optical reading method of information pattern

An information pattern, optical reading technology, applied in chemical instruments and methods, cards for carrying information, record carriers used by machines, etc., to achieve reliable information interpretation and improve security.

CN102282568AInactive Publication Date: 2011-12-14METRO ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2011-12-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

Provided is an information pattern carrier, wherein an information pattern (12) is made invisible by forming a mask (13) on the information pattern formed by colored ink or making the color of the colored ink the same as the ground color of an information recording medium (11) or the color of a colored underprint portion. When the information recording medium (11) having the information pattern (12) is mounted on or carried into a predetermined position, excitation light (H1) having energy higher than that of the bandgap of semiconductor quantum dots is applied to the information pattern (12) from a light-emitting diode (15) to thereby thermally expand the semiconductor quantum dots. Light having a wavelength that is shifted to the long-wavelength side is emitted from the thermally expanded semiconductor quantum dots, the emitted light is received by a light sensor (16) having sensitivity to a portion on the long-wavelength side of the shifted wavelength, and the information pattern (12) is read by an information determining unit (17).
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Description

technical field

[0001] The present invention relates to an information pattern carrier such as an information recording medium or a managed object on which information patterns such as barcodes and QR codes are printed, and an optical reading method of the information patterns. Background technique

[0002] In recent years, for various articles, various prepaid cards or pass cards, etc., by printing information patterns such as barcodes or QR codes, and using optical reading devices to read the information patterns, various articles, various Administration or authentication verification of prepaid or pass cards. Under such circumstances, various security systems have been proposed which discriminate whether or not an information pattern is forged by applying an anti-counterfeit treatment to an information pattern and reading the information by an optical reading system.

[0003] Patent Document 1 discloses an optical reading device that prints an information pattern such as...

Examples

no. 1 Embodiment approach

[0071] figure 1 It is a schematic diagram of the information pattern carrier and the reading device for carrying out the optical reading method of this embodiment. The reading device 1 reads information on the information recording card 10A, and has a schematic configuration including a light emitting diode 15 and an optical reading mechanism 2 .

[0072] The information recording card 10A includes an information recording medium 11 and an information pattern carrier 11A on the information recording medium 11 . The information pattern carrier 11A has a printed information pattern 12 such as a visible barcode or a QR code, and a mask printed body 13 that makes the information pattern 12 overlap by printing the information pattern 12 after printing the information pattern 12. The information pattern 12 becomes invisible. The information recording card 10A is a card-shaped object on which information is recorded, and is suitable for, for example, cash cards, various prepaid car...

no. 2 Embodiment approach

[0097] Figure 4 It is a schematic diagram of a reading device for implementing the optical reading method of the second embodiment. The information recording card 10B of this embodiment has an information pattern carrier 11B, and the information pattern carrier 11B has an information recording medium (or managed object) 11, a base printing layer 14 that is printed on the information recording medium 11 but does not form an information pattern, and printed on the information pattern carrier 11B. An information pattern 12 such as a barcode or a QR code on the information recording medium 11 . In addition, the same code|symbol is attached|subjected to the part which overlaps with 1st Embodiment, and description is abbreviate|omitted.

[0098] In this embodiment, the information pattern 12 is made invisible by setting the color of the information pattern 12 to be the same color as the color of the undercolored printed layer 14 obtained by underprinting the information pattern 12...

no. 3 Embodiment approach

[0102] Figure 5 It is a schematic diagram of a reading device for implementing the optical reading method of the third embodiment. In the reading device 1A of the present embodiment, the cooling mechanism 3 for thermally shrinking the semiconductor quantum dots is provided by cooling the semiconductor quantum dots. In addition, the same code|symbol is attached|subjected to the part which overlaps with 1st Embodiment, and description is abbreviate|omitted.

[0103] The cooling mechanism 3 is a mechanism for cooling the information pattern 12 and further cooling the semiconductor quantum dots in this embodiment. Here, the cooling mechanism 3 is an electric cooler, which is provided adjacent to or in contact with the surface of the information recording medium 11 on which the information pattern 12 is not printed, and can be cooled to a temperature of -10°C to 0°C.

[0104] As the optical sensor 16A that the optical reading mechanism 2A possesses, the figure 2 The range from...