Code reader for converting two dimensional information into a one dimensional format

• US 6,164,545 A
• Filed: 08/19/1996
• Issued: 12/26/2000
• Est. Priority Date: 03/12/1992
• Status: Expired due to Fees

• Current Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Original Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Inventors: Danielson, Arvin D.
• Primary Examiner(s): Hajec, Donald T.
• Assistant Examiner(s): Frech, Karl
• Application Number:
  US08/704,427
• Time in Patent Office: 1,590 Days
• Field of Search: 235/472, 235/467, 235/462
• US Class Current: 235/472.01
• CPC Class Codes: G06K 17/0022 arrangements or provisions for transferring data to distant stations, e.g. from a sensing device "transfer between computer elements G06F13/00 "; data-transmission H04L
• CPC Class Codes: G06K 2007/10524 Hand-held scanners
• CPC Class Codes: G06K 2207/1011 Aiming
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10811 Focalisation
• CPC Class Codes: G06K 7/1417 2D bar codes
• CPC Class Codes: G06K 7/1482 using fuzzy logic or natural solvers, such as neural networks, genetic algorithms and simulated annealing
• CPC Class Codes: H04N 1/107 with manual scanning

Abstract

A scanner for reading two-dimensional optical information sets is described which includes a housing for supporting a photosensitive array associated with an optical string adapted to focus optical information on the array. Also provided are array and optical string controls for controlling the array and optical string such that the output of selected images on the array are processed via pattern recognition techniques. Images recognized to contain decodable optical information are displayed and highlighted by a display. In addition, the scanner provides autodetect circuitry for determining the type of terminal to which it is attached and automatically converts the two-dimensional code information into an appropriate one dimensional format, as needed, for communication to an attached terminal.

Claims

1. A code reading system for converting two-dimensional code information into a format useable by any of a plurality of types of terminals, wherein at least one of the plurality of types of terminals accepts two-dimensional code information and at least one of the plurality of types of terminals accepts only one-dimensional code information, said two-dimensional code reading system comprising:

a code reader unit;

a light source in the code reader unit that directs light toward two-dimensional code information to be read;

a sensor in the code reader unit that detects light reflected from the two-dimensional code information;

processing circuitry in the code reader unit for decoding the two-dimensional code information represented by the reflected light detected by said sensor;

an autodetect circuit that identifies whether said code reader unit is communicatively coupled to a terminal and determines whether a communicatively coupled terminal accepts two-dimensional code information;

said autodetect circuit also identifies an appropriate protocol for communicating with a communicatively coupled terminal; and

communication control circuit responsive to the autodetect circuit by selectively converting at least part of the two-dimensional decoded information into a one-dimensional format for communication to any communicatively coupled terminal that cannot process two-dimensional code information.

2. The code reading system of claim 1 further comprising:

a wired link having a plurality of signal lines which coordinate to communicatively couple said code reading unit with a terminal; and

said autodetect circuit determines whether a communicatively coupled terminal accepts two-dimensional code information by evaluating the plurality of signal lines of said wired link.

3. The code reading system of claim 1 wherein said autodetect circuit determines whether a communicatively coupled terminal accepts two-dimensional code information by attempting delivery of two-dimensional code information.

4. The code reading system of claim 1 wherein said communication control circuit selectively converts the two-dimensional code information into an undecoded one-dimensional format.

5. A code reading network for reading and processing two-dimensional code information, said network comprising:

a code reader unit generating two-dimensional code information via an illumination, detection and decoding process;

a terminal selected from among a plurality of types of terminals, wherein at least one of the plurality of types of terminals accepts two-dimensional code information and at least one of the plurality of types of terminals only accepts one-dimensional code information;

a communication link communicatively coupling said code reader unit and said terminal; and

said code reader unit converts at least part of the two-dimensional code information into a format that said terminal can accept if two-dimensional code information is not acceptable.

6. The code reading network of claim 5 wherein said code reader unit converts the two-dimensional code information into an undecoded one-dimensional format.

7. The code reading network of claim 5 wherein said code reader unit converts the two-dimensional code information into a decoded one-dimensional format.

8. The code reading network of claim 5 wherein:

said communication link comprising a wired link having a plurality of signal lines which coordinate to communicatively couple said code reading unit with said terminal; and

said code reading unit identifies characteristics of said terminal by evaluating the plurality of signal lines of the wired link.

9. The code reading network of claim 5 wherein said code reading unit determines whether said terminal accepts two-dimensional code information by attempting delivery of two-dimensional code information via said communication link.

10. A code reading network for reading and processing two-dimensional code information, said network comprising:

a code reader unit generating two-dimensional code information via a code reading process;

a terminal selected from among a plurality of types of terminals, wherein at least one of the plurality of types of terminals accepts two-dimensional code information, and at least one of the plurality of types of terminals accepts only one-dimensional code information;

a communication link communicatively coupling said code reader unit and said terminal; and

said code reader unit selectively manipulates the two-dimensional code information based on the one of the plurality of types of terminals selected to enable delivery via said communication link to said terminal.

11. The code reading network of claim 10 wherein:

said communication link comprises a wired link having a plurality of signal lines which coordinate to communicatively couple said code reading unit with said terminal; and

said code reading unit identifies characteristics of said terminal by evaluating the plurality of signal lines of the wired link.

12. The code reading network of claim 11 wherein said code reading unit determines whether said one of the plurality of terminal accepts two-dimensional code information by attempting delivery of two-dimensional code information.

13. In a code processing network having a terminal that processes code information in a one dimensional format yet cannot process code information in a two dimensional format, a code reader unit that captures two dimensional code images, the code reader unit comprising:

an interface that supports communication to the terminal;

processor that performs decoding of captured two-dimensional code images to extract code information in a two dimensional format; and

the processor converts the extracted code information from the two dimensional format into a one dimensional format for receipt and processing by the terminal.

14. The code reader unit of claim 13 wherein the one dimensional format constitutes an undecoded, one-dimensional format.

15. The code reader unit of claim 13 wherein the one dimensional format constitutes a decoded, one dimensional format.

16. The code reader unit of claim 13 wherein the processor selectively converts the code information from the two dimensional format to the one dimensional format based on the determination by the processor that the terminal cannot accept the two dimensional format.

17. The code reader unit of claim 16 wherein the processor automatically determines the format capabilities of the terminal when communicatively coupled to the terminal via the interface.