Virtual barcodes
AssigneeChamelon Network Inc.
InventorsTodd O. Burger, Stuart Lipoff, Matthew Hickox
Life of this patent
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Abstract
In one embodiment, an apparatus comprises an electrically-controlled illumination source, and a circuit configured to control the illumination source so as cause the light source to generate at least one sequence of light pulses that mimics those a photo-detector of a bar code reader would observe from a reflected source when reading a printed bar code symbol. In another embodiment, an apparatus comprises an electronically reconfigurable, reflective display that is insensitive to a polarization of an incident illumination source, and a circuit configured to selectively configure the display to display a bar code symbol thereon.
Claims16
1-31. (canceled)
A method, comprising a step of:
- using an electrically-controlled illumination source to generate at least one sequence of light pulses that mimics the reflected radiation a photo-detector of a bar code reader would observe when a radiation source of the bar code reader projected incident radiation on a printed bar code symbol comprising a mix of narrow and wide stripes that represent particular data.
A method, comprising a step of:
- using a bar code reader to read bar code information from at least one sequence of light pulses that is generated by an electrically-controlled illumination source and is not reflected from a printed bar code symbol.
A method, comprising a step of:
- displaying at least one bar code symbol on an electronically reconfigurable, reflective display that is insensitive to a polarization of an incident illumination source and is free of polarizers.
An apparatus, comprising:
- an electrically-controlled illumination source;
- and
- a circuit configured to control the illumination source so as cause the light source to generate at least one sequence of light pulses that mimics the reflected radiation a photo-detector of a bar code reader would observe when a radiation source of the bar code reader projected incident radiation on a printed bar code symbol comprising a mix of narrow and wide stripes that represent particular data.
An apparatus, comprising:
- an electronically reconfigurable, reflective display that is insensitive to a polarization of an incident illumination source and is free of polarizers;
- and
- a circuit configured to selectively configure the display to display a bar code symbol thereon.
Dependencies are inferred from the claim text.