Data tag with a position detection pattern

• US 7,784,703 B2
• Filed: 11/26/2008
• Issued: 08/31/2010
• Est. Priority Date: 06/30/2000
• Status: Expired due to Fees

• Current Assignee: Silverbrook Research Pty Limited
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Lapstun, Paul, Walmsley, Simon Robert
• Primary Examiner(s): LE, THIEN MINH
• Application Number:
  US12/324,537
• Publication Number:
  US 20090084860A1
• Time in Patent Office: 643 Days
• Field of Search: 235/494, 23546201-46225, 235/470
• US Class Current: 235/494
• CPC Class Codes: G06K 1/121 by printing code marks applying code marks to labels B65C9/46; marking or coding completed packages B65B61/26
• CPC Class Codes: G06K 19/06 characterised by the kind of the digital marking, e.g. shape, nature, code
• CPC Class Codes: G06K 19/06037 multi-dimensional coding
• CPC Class Codes: G06K 19/06168 the marking being a concentric barcode
• CPC Class Codes: G06K 2019/06262 with target- or other orientation-indicating feature
• CPC Class Codes: G06K 7/1417 2D bar codes
• CPC Class Codes: G06K 7/1421 Circular bar codes
• CPC Class Codes: G06K 7/1443 locating of the code in an image
• CPC Class Codes: G06K 7/1456 determining the orientation of the optical code with respect to the reader and correcting therefore

Abstract

A two-dimensional printed data tag for detection by an optical tag reader has a position detection pattern configured so that an optical tag reader can locate the tag. Data areas are located within the confines of the position detection pattern, the data areas containing encoded data.

Claims

1. A two-dimensional printed data tag for detection by an optical tag reader, the data tag comprising:

a position detection pattern configured for facilitating location of the tag by the optical tag reader; and

data areas located within the confines of the position detection pattern, the data areas containing encoded data, wherein

the position detection pattern is in the form of a constant background pattern containing orientation and perspective information.

2. A data tag as claimed in claim 1, wherein the position detection pattern includes a circular locator component and an orientation component.

3. A data tag as claimed in claim 1, wherein the two-dimensional printed data tag has print dot placement and rendering to 1600 dpi.

4. A data tag as claimed in claim 3, wherein the print dot placement and rendering represents a single bit of data by an arbitrary printed shape.

5. A data tag as claimed in claim 4, wherein the print dot placement and rendering is such that the data in the data areas is redundancy-encoded.

6. A data tag as claimed in claim 1, wherein the data areas are arranged in concentric data segments.

7. A data tag comprising:

a position detection arrangement by which an optical tag reader locates the tag, the position detection arrangement including an endless locator component and an orientation component; and

a data area located in the position detection arrangement.