초록 ▼

The present invention relates to a bar code reading device for reading 1D or 2D bar code symbols. The bar code reading device, in one embodiment, can receive a command to disable symbology reading. In another embodiment, a bar code reading device can have a timercount and an image memory. In one emb

The present invention relates to a bar code reading device for reading 1D or 2D bar code symbols. The bar code reading device, in one embodiment, can receive a command to disable symbology reading. In another embodiment, a bar code reading device can have a timercount and an image memory. In one embodiment, a bar code reading device can be configured to read bar code symbols of more than one bar code symbology.

대표청구항 ▼

1. A method for operating a hand held bar code reader for decoding either a 1D or 2D bar code symbol: (a) providing a timercount memory space for storing timercount data;(b) providing an image memory space for storing bit image representation data;(c) moving said hand held bar code reader across sai

1. A method for operating a hand held bar code reader for decoding either a 1D or 2D bar code symbol: (a) providing a timercount memory space for storing timercount data;(b) providing an image memory space for storing bit image representation data;(c) moving said hand held bar code reader across said 1D or 2D bar code symbol while imaging a succession of 1D slices thereof;(d) storing a bit image representation of each slice into said image memory space;(e) examining image data of said image memory space after storage of each bit image representation to determine if the image memory space includes representation of a 2D finder pattern;(f) if a 2D finder pattern is found at step (e), storing a predetermined number of additional slice bit image representations into said image memory space, the predetermined number being a number sufficient to assure that a symbol representation of sufficient size to allow decoding is stored in said image memory space. 2. The method of claim 1, wherein said moving step includes the step of asynchronously moving said hand held bar code reader across said 1D or 2D bar code symbol. 3. The method of claim 1, wherein said method further includes the step of setting a scan counter if it is determined at step (e) that said image memory space includes a representation of a 2D finder pattern. 4. The method of claim 1, wherein said method includes the steps of (i) setting a scan counter if it is determined at step (e) that said image memory space includes a representation of the 2D finder pattern; and (ii) attempting to decode the 1D or 2D bar code symbol as a 2D bar code symbol if a count of said scan counter has been satisfied. 5. The method of claim 1, wherein the method includes setting a scan counter. 6. The method of claim 1, wherein the method includes setting a scan counter responsively to the examining image data. 7. The method of claim 1, wherein the storing includes using the imaging memory space on a first in-first out basis. 8. A method for operating a bar code reader for decoding either a 1D or 2D bar code symbol: (a) providing a timercount memory space for storing timercount data;(b) providing an image memory space for storing bit image representation data;(c) imaging a succession of 1D slices of said 1D or 2D bar code symbol while providing relative movement between the 1D or 2D bar code symbol and said bar code reader;(d) storing a bit image representation of each slice into said image memory space;(e) examining image data of said image memory space after storage of each bit image representation to determine if the image memory space includes representation of a 2D finder pattern;(f) if a 2D finder pattern is found at step (e), storing a predetermined number of additional slice bit image representations into said image memory space, the predetermined number being a number sufficient to assure that a symbol representation of sufficient size to allow decoding is stored in said image memory space. 9. The method of claim 8, wherein said imaging step includes the step of asynchronously moving said bar code reader across said 1D or 2D bar code symbol. 10. The method of claim 8, wherein said method further includes the step of setting a scan counter if it is determined at step (e) that said image memory space includes a representation of a 2D finder pattern. 11. The method of claim 8, wherein said method includes the steps of (i) setting a scan counter if it is determined at step (e) that said image memory space includes a representation of the 2D finder pattern; and (ii) attempting to decode the 1D or 2D bar code symbol as a 2D bar code symbol if a count of said scan counter has been satisfied. 12. The method of claim 8 wherein the method includes setting a scan counter. 13. The method of claim 8, wherein the method includes setting a scan counter responsively to the examining image data. 14. The method of claim 8, wherein the storing includes using the imaging memory space on a first in-first out basis. 15. A method for operating a bar code reader for decoding either a 1D or 2D bar code symbol: (a) providing a timercount memory space for storing timercount data;(b) providing an image memory space for storing bit image representation data;(c) imaging a succession of 1D slices of said 1D or 2D bar code symbol while providing relative movement between the 1D or 2D bar code symbol and said bar code reader;(d) storing a bit image representation of each slice into said image memory space;(e) examining image data of said image memory space after storage of each bit image representation to determine if the image memory space includes representation of a 2D finder pattern;(f) if a 2D finder pattern is found at step (e), storing additional slice bit image representations into said image memory space, the additional slice bit image representations being of a number sufficient to assure that a symbol representation of sufficient size to allow decoding is stored in said image memory space.