Formation method of two-dimensional code
First Claim
1. A formation method of a two-dimensional code for forming the two-dimensional code, in which unit cells in a dark and bright pattern are arranged in a matrix, on a marking surface by laser burning, comprising the steps of:
- substituting a square unit cell, in which dots are arranged in an n×
n or n×
m matrix, n and m are integers, for a unit cell, forming a dark or bright unit cell by the laser burning, in image data of the two-dimensional code;
irradiating the marking surface of metal, resin, ceramics, a transparent material, or the like with a laser beam for direct burning;
forming dots on the marking surface through thermal deformation; and
forming the two-dimensional code in a dark and bright pattern formed by combining dark or bright unit cells and bright or dark unit cells to which the laser burning has not even performed.
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Abstract
A formation method of a two-dimensional code according to the present invention is characterized in that the method comprises the steps of: substituting a square unit cell, in which a plurality of dark round dots 6 are arranged in a matrix, for a dark unit cell from image data of a two-dimensional code 1 formed in a bright and dark pattern to transform the image data; burning these dark round dots 6 on a marking surface with a laser beam; and forming the two-dimensional code in a dark and bright pattern formed by combining dark unit cells 2A, formed with dark round dots 6, and bright unit cells 2b to which laser burning has not been performed.
19 Citations
2 Claims
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1. A formation method of a two-dimensional code for forming the two-dimensional code, in which unit cells in a dark and bright pattern are arranged in a matrix, on a marking surface by laser burning, comprising the steps of:
- substituting a square unit cell, in which dots are arranged in an n×
n or n×
m matrix, n and m are integers, for a unit cell, forming a dark or bright unit cell by the laser burning, in image data of the two-dimensional code;
irradiating the marking surface of metal, resin, ceramics, a transparent material, or the like with a laser beam for direct burning;
forming dots on the marking surface through thermal deformation; and
forming the two-dimensional code in a dark and bright pattern formed by combining dark or bright unit cells and bright or dark unit cells to which the laser burning has not even performed. - View Dependent Claims (2)
- substituting a square unit cell, in which dots are arranged in an n×
Specification
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- Resources
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Current AssigneeArai KK
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Original AssigneeKazuo Sato
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InventorsSato, Kazuo
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Primary Examiner(s)Pitts, Harold I.
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Application NumberUS09/329,294Time in Patent Office565 DaysField of Search235/494, 235/456US Class Current235/494CPC Class CodesG06K 1/126 by photographic or thermogr...G06K 19/06037 multi-dimensional coding
