Digital-imaging code symbol reading system supporting automatic programming of system parameters for automatic configuration of said system in hands-on and hands-free modes of operation

• US 7,588,190 B2
• Filed: 12/07/2006
• Issued: 09/15/2009
• Est. Priority Date: 11/13/2003
• Status: Expired due to Fees

• Current Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Original Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Inventors: Zhu, Xiaoxun, Knowles, C. Harry, Au, Ka Man, Liu, Yong, Schmidt, Mark, Kotlarsky, Anatoly, Tao, Xi, Russell, Garrett, Bonanno, John
• Primary Examiner(s): Kim; Ahshik
• Application Number:
  US11/635,435
• Publication Number:
  US 20070145148A1
• Time in Patent Office: 1,013 Days
• Field of Search: 235/472.01, 235/462.11, 235/462.14, 235/462.24, 235/462.42
• US Class Current: 235/472.01
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: G06K 7/10851 Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device basic electronic circuitry H03
• CPC Class Codes: G06K 7/10881 constructional details of hand-held scanners

Abstract

A digital-imaging based code symbol reading system having a hands-on mode operation and a hands-free presentation mode of operation, and supporting automatic programming of system parameters for automatic configuration of the system in hands-on and hands-free modes of operation. The system comprises: an image formation and detection subsystem; an illumination subsystem; a digital image processing subsystem; a system control subsystem for managing system parameters, and controlling and/or coordinating operations of the system; and a configuration detection mechanism. The image formation and detection subsystem has the area-type image sensing array for detecting digital images of objects formed thereon by image formation optics providing a field of view (FOV) for the system. Within the FOV of the image formation and detection subsystem, the illumination subsystem produces a field of illumination that illuminates the object during the image capture mode of operation, and one or more digital images thereof are detected by an area-type image sensing array. When the hand-supportable housing is picked up from on a countertop surface or support stand and held in an operator'"'"'s hand, the system parameters are automatically programmed so that the digital-imaging code symbol reading system is automatically configured into its hands-on mode of operation. When the hand-supportable is resting on the countertop surface or in the support stand, the system parameters are automatically programmed so that the digital-imaging code symbol reading system is automatically configured into its hands-free presentation mode of operation.

Claims

1. A digital-imaging based code symbol reading system having a hands-on mode operation and a hands-free presentation mode of operation, said digital-imaging based code symbol reading system comprising:

a hand-supportable housing having a light transmission window;

an image formation and detection subsystem, disposed in said hand-supportable housing, and having (i) image formation optics for projecting a field of view (FOV) through said light transmission window and upon an object to be imaged in said FOV, and (ii) an area-type image sensing array for detecting imaged light reflected off the object during illumination operations in an image capture mode in which rows of sensor elements in said area-type image sensing array are enabled so as to detect one or more digital images of the object formed on said area-type image sensing array;

an illumination subsystem, disposed in said hand-supportable housing, and having an illumination array for producing and projecting a field of illumination through said light transmission window and within said FOV during the image capture mode;

an image capturing and buffering subsystem, disposed in said hand-supportable housing, for capturing and buffering said one or more digital images detected by said image formation and detection subsystem;

a digital image processing subsystem, disposed in said hand-supportable housing, for processing said one or more digital images captured and buffered by said image capturing and buffering subsystem, so as to read one or more code symbols graphically represented therein, and producing symbol character data representative of said read one or more code symbols;

an input/output subsystem, disposed in said hand-supportable housing, for outputting said symbol character data to an external host system or other information receiving or responding device;

a system control subsystem, disposed in said hand-supportable housing, for maintaining system parameters used to configure said digital-imaging based code symbol reading system, and for controlling and/or coordinating the operation of one or more of the subsystem components described above;

a configuration detection mechanism, disposed in said hand-supportable housing, for (i) automatically detecting when said hand-supportable housing is picked up off a countertop surface or a support stand and held in an operator'"'"'s hand, and automatically programming said system parameters to automatically configure said digital-imaging based code symbol reading system into said hands-on mode of operation, and also for (i) automatically detecting when said hand-supportable housing is resting on said countertop surface or in said support stand, and in response thereto, automatically programming said system parameters to automatically configure said digital-imaging code symbol reading system into said hands-free presentation mode of operation; and

a micro-computing platform, disposed in said hand-supportable housing, for implementing said digital image processing subsystem, said input/output subsystem and said system control subsystem;

wherein said micro-computing platform includes a microprocessor, a memory architecture, and a three-tier modular software architecture characterized by an Operating System (OS) layer, a System CORE (SCORE) layer, and an application layer and responsive to the generation of a triggering event within said digital-imaging based code symbol reading system.

2. The digital-imaging based code symbol reading system of claim 1, wherein said configuration detection mechanism comprises at least one of a physical-contact based switch and an optical-sensing based switch, associated with said hand-supportable housing or said stand, and wherein said physical-contact based switch or said optical-sensing trigger switch is actuated when said hand-supportable housing is picked up off said countertop surface or from said support stand.

3. The digital-imaging based code symbol reading system of claim 1, wherein said OS layer includes one or more software modules selected from the group consisting of an OS kernal module, an OS file system module, and device driver modules;

wherein said SCORE layer includes one or more of software modules selected from the group consisting of a tasks manager module, an events dispatcher module, an input/output manager module, a user commands manager module, the timer subsystem module, an input/output subsystem module and a memory control subsystem module; and

wherein said application layer includes one or more software modules selected from the group consisting of a code symbol decoding module, a function programming module, an application events manager module, a user commands table module, and a command handler module.

4. The digital-imaging based code symbol reading system of claim 3, wherein, prior to reading one or more code symbols on the object, said microprocessor rapidly initializes said micro-computing platform by performing the following operations:

(1) accessing one or more software modules from said OS layer and executing code contained therein;

(2) accessing one or more software modules from said SCORE layer and executing code contained therein; and

(3) accessing one or more software modules from said application layer and executing code contained therein.

5. The digital-imaging based code symbol reading system of claim 4, wherein, after said computing platform has been initialized, and in response to the generation of said triggering event;

(4) said illumination subsystem automatically produces said field of illumination and illuminates the object within said FOV;

(5) said area-type image sensing array automatically detects said one or more digital images of the illuminated object while said object is being illuminated by said field of illumination;

(6) said image capturing and buffering subsystem automatically captures and buffers the detected one or more digital images of the object;

(7) said digital image processing subsystem automatically processes captured and buffered digital images, so as to read one or more code symbols graphically represented therein, and produce symbol character data representative of said read one or more code symbols; and

(8) said input/output subsystem outputs said symbol character data to said external host system or other information receiving or responding device.

6. The digital-imaging based code symbol reading system of claim 5, which further comprises an automatic object detection subsystem disposed in said hand-supportable housing, for automatically detecting the presence of the object in said FOV, and in response thereto, generating a trigger signal indicative of said triggering event.

7. The digital-imaging based code symbol reading system of claim 5, wherein said hand-supportable housing has a trigger switch integrated with said hand-supportable housing, and wherein said trigger switch is manually actuatable by an operator of said digital-imaging based code symbol reading system so as to generate a trigger signal indicating said triggering event.

8. The digital-imaging based code symbol reading system of claim 5, wherein, when said digital-imaging based code symbol reading system is configured into said hands-on mode of operation, said illumination subsystem produces a field of narrow-area illumination within said FOV, said area-type image sensing array detects a narrow-area digital image of the illuminated object, and said digital processing subsystem processes said narrow-area digital image so as to read at least one 1D code symbol graphically represented therein, and produce symbol character data representative of said read 1D code symbol.

9. The digital-imaging based code symbol reading system of claim 5, wherein, when said digital-imaging based code symbol reading system is configured into said hands-free mode of operation, said illumination subsystem produces a field of wide-area illumination within said FOV, said area-type image sensing array detects a wide-area digital image of the illuminated object, and said digital image processing subsystem processes said wide-area digital image so as to read one or more 1D and/or 2D code symbols graphically represented therein, and produce symbol character data representative of said one or more 1D and/or 2D code symbols.

10. The digital-imaging based code symbol reading system of claim 5, wherein, when said digital-imaging based code symbol reading system is configured into said hands-on mode of operation, during a first illumination and imaging cycle, said illumination subsystem produces a field of narrow-area illumination within said FOV, said area-type image sensing array detects a narrow-area digital image of the illuminated object, and said digital image processing subsystem then processes said narrow-area digital image so as to read at least one 1D code symbol graphically represented therein, and produces symbol character data representative of said read 1D code symbol;

and in the event that said digital image processing subsystem fails to read at least one 1D code symbol during said first illumination and imaging cycle, then during a second illumination and imaging cycle automatically controlled and/or coordinated by said system control subsystem, said illumination subsystem produces a field of wide-area illumination within said FOV, said area-type image sensing array detects a wide-area digital image of the illuminated object, and said digital image processing subsystem processes said wide-area digital image so as to read one or more 1D and/or 2D code symbols graphically represented therein, and produce symbol character data representative of said one or more 1D and/or 2D code symbols.

11. The digital-imaging based code symbol reading system of claim 3, wherein upon the generation of said triggering event, said triggering event is automatically received by at least one said device driver module in said OS layer, wherein said triggering event is then dispatched by said events dispatcher module in said SCORE layer, and then said trigger event is managed by said events manager module in said application layer, which ultimately executes a main task that is managed by said tasks manager module in said SCORE layer.

12. The digital-imaging based code symbol reading system of claim 11, wherein said main task controls and/or coordinates said subsystems and manages the following sequence of events:

(i) illuminating said FOV;

(ii) capturing a digital image of the object in said FOV;

(iii) processing of said digital image so as to read one or more code symbols represented in said processed digital image;

(iv) upon successfully reading one or more code symbols graphically represented in said processed digital image, then sending symbol character data representative of said read one or more code symbols, to said external host system or other information receiving or responding device; and

(vi) then exiting said main task.

13. The digital-imaging based code symbol reading system of claim 1, wherein said field illumination comprises narrow-band illumination produced from an array of light emitting diodes (LEDs).

14. The digital-imaging based code symbol reading system of claim 1, which further comprises an automatic object detection subsystem disposed in said hand-supportable housing, for automatically detecting the presence of the object in said FOV, and in response thereto, generating a trigger signal indicating said triggering event;

and wherein said hand-supportable housing is also supportable on a counter-top surface for operation during said hands-free presentation mode of operation.

15. The digital-imaging based code symbol reading system of claim 1, wherein said area-type image sensing array comprises a CMOS image sensing array.

16. The digital-imaging based code symbol reading system of claim 1, wherein each said code symbol is a bar code symbol selected from the group consisting of a 1D bar code symbol, a 2D bar code symbol, and a data matrix type code symbol structure.

17. The digital-imaging based code symbol reading system of claim 1, which further comprises an illumination control subsystem disposed in said hand-supportable housing, for controlling the operation of said illumination subsystem during said image capture mode.