DATA TRANSMISSION TO OPTICAL TERMINALS

• US 20120138693A1
• Filed: 11/23/2011
• Published: 06/07/2012
• Est. Priority Date: 12/01/2010
• Status: Active Grant

• Current Assignee: HID Global Corporation (Assa Abloy AB)
• Original Assignee: Lumidigm Incorporated (Assa Abloy AB)
• Inventors: Rowe, Robert K., Litz, Alexander A.
• Granted Patent: US 8,651,383 B2
• Time in Patent Office: Days
• US Class Current: 235/494
• CPC Class Codes: G06K 7/1095 the scanner comprising adaptations for scanning a record carrier that is displayed on a display-screen or the like

Abstract

Methods are disclosed for transmitting information from a handheld device to a terminal. The information is encoded as a barcode pattern. The barcode pattern is generated on a display of the handheld device. A size of the barcode pattern is periodically modulated on the display while maintaining internal relative dimensions within the barcode pattern. The periodically modulating barcode pattern is displayed to an optical reader of the terminal.

Claims

1. A method of transmitting information from a handheld device to a terminal, the method comprising:

encoding the information as a barcode pattern;

generating the barcode pattern on a display comprised by the handheld device;

periodically modulating a size of the barcode pattern on the display while maintaining internal relative dimensions within the barcode pattern; and

displaying the periodically modulating barcode pattern to an optical reader comprised by the terminal.

2. The method recited in claim 1 wherein the barcode pattern comprises a two-dimensional barcode pattern.

3. The method recited in claim 1 wherein the barcode pattern comprises a color barcode pattern.

4. The method recited in claim 1 further comprising changing the barcode pattern on the display during a time interval when the periodically modulating barcode pattern is displayed to the optical reader.

5. The method recited in claim 1 further comprising encrypting the information prior to encoding the information as the barcode pattern, wherein encoding the information as the barcode pattern comprises encoding the encrypted information.

6. The method recited in claim 5 wherein encrypting the information comprises encrypting the information with a one-time encryption key.

7. A handheld device comprising:

a display screen; and

a processor coupled with the display screen, the processor having;

instructions to encode information as a barcode pattern;

instructions to generate the barcode pattern on the display screen;

instructions to periodically modulate a size of the barcode pattern on the display screen while maintaining internal relative dimensions within the barcode pattern; and

instructions to display the periodically modulating barcode pattern to an optical reader comprised by a terminal to transmit the information from the handheld device to the terminal.

8. The handheld device recited in claim 7 wherein the barcode pattern comprises a two-dimensional barcode pattern.

9. The handheld device recited in claim 7 wherein the barcode pattern comprises a color barcode pattern.

10. The handheld device recited in claim 7 wherein the processor further has instructions to change the barcode pattern on the display screen during a time interval when the periodically modulating barcode pattern is displayed to the optical reader.

11. The handheld device recited in claim 7 wherein the process further has instructions to encrypt the information prior to encoding the information as the barcode pattern, wherein the instructions to encode the information as the barcode pattern comprise instructions to encode the encrypted information.

12. The handheld device recited in claim 11 wherein the instructions to encrypt the information comprise instructions to encrypt the information with a one-time encryption key.