PRINT STRUCTURE, PRINTING METHOD AND READING METHOD FOR MEDIUM SURFACE WITH PRINT-FORMED DOT PATTERN

• US 20110164267A1
• Filed: 12/23/2010
• Published: 07/07/2011
• Est. Priority Date: 10/15/2004
• Status: Active Grant

• Current Assignee: Kenji Yoshida
• Original Assignee: Kenji Yoshida
• Inventors: YOSHIDA, Kenji
• Granted Patent: US 8,023,148 B2
• Time in Patent Office: Days
• US Class Current: 358/1.13
• CPC Class Codes: B41M 3/144 using fluorescent, luminescent or iridescent effects
• CPC Class Codes: B42D 25/29 Securities; Bank notes
• CPC Class Codes: G06K 19/06037 multi-dimensional coding

Abstract

With the aim of realizing an easy and inexpensive method of realizing a “stealth” dot pattern, whose presence on a medium surface is not visually recognizable, merely through minor improvements in the existing printing technology, the present invention provides dots which form a dot pattern by printing these dots using an ink of any color reactive in the infrared or ultraviolet wavelength range on a medium surface on which a dot pattern is to be formed, for use with a dot pattern reading system that irradiates infrared or ultraviolet light on a medium surface having a dot pattern provided thereon, recognizes the dot pattern by reading the reflections of the light with an optical reading means, converts the dot pattern into the corresponding data, and outputs the text, voice, images and so forth contained in the data.

Claims

1. A medium surface on which a dot pattern is formed for use with a dot pattern reading system that irradiates infrared light on a medium surface having a dot pattern provided thereon, recognizes the dot pattern by reading the reflections of the light by use of an optical reading means, converts the dot pattern into the corresponding data, and outputs the text, voice, images and so forth contained in the data, wherein a print structure on the medium surface is provided with:

a first print layer printed and formed with dots forming said dot pattern with an ink which absorbs light in an infrared wavelength range;

a second print layer printed and formed on the dot section with an opaque ink which is a similar color to that of the medium surface, allows normal printing on an upper layer, and transmits infrared rays; and

a third print layer which is the upper layer and printed normally with an ink which transmits infrared rays.