Optical code reader including circuitry for processing the read symbology
First Claim
Patent Images
1. A method comprising the steps of:
- providing an apparatus having an optical detector, an optical emitter, an amplifier, and an analog-to-digital converter, the amplifier having an input, an output, and a control input, the input responsive to the optical detector, the analog-to-digital converter responsive to the output;
illuminating the optical emitter;
setting a variable to digitally represent a time duration scaling factor;
reading a sample from the analog-to-digital converter;
if the sample is less than a first threshold, applying a first signal to the control input for a first duration based upon the variable; and
if the sample is greater than a second threshold, applying a second signal to the control input for a second duration based upon the variable.
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Accused Products
Abstract
An amplifier has an input responsive to an optical detector. An analog-to-digital converter is responsive to an output of the amplifier. A processor activates an optical emitter, and reads a first sample from the analog-to-digital converter. Upon determining that the first sample is less than a first threshold, the processor applies a first signal to a control input of the amplifier for a first duration. The processor reads a second sample from the analog-to-digital converter. Upon determining that the second sample is greater than a second threshold, the processor applies a second signal to the control input for a second duration less than the first duration.
20 Citations
33 Claims
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1. A method comprising the steps of:
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providing an apparatus having an optical detector, an optical emitter, an amplifier, and an analog-to-digital converter, the amplifier having an input, an output, and a control input, the input responsive to the optical detector, the analog-to-digital converter responsive to the output; illuminating the optical emitter; setting a variable to digitally represent a time duration scaling factor; reading a sample from the analog-to-digital converter; if the sample is less than a first threshold, applying a first signal to the control input for a first duration based upon the variable; and if the sample is greater than a second threshold, applying a second signal to the control input for a second duration based upon the variable. - View Dependent Claims (2, 3, 4, 5)
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6. A method comprising the steps of:
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providing an apparatus having an optical detector, an optical emitter, an amplifier, and an analog-to-digital converter, the amplifier having an input, an output, and a control input, the input responsive to the optical detector, the analog-to-digital converter responsive to the output; illuminating the optical emitter; reading a first sample from the analog-to-digital converter; determining that the first sample is less than a first threshold; upon determining that the first sample is less than the first threshold, applying a first signal to the control input for a first duration; reading a second sample from the analog-to-digital converter; determining that the second sample is greater than a second threshold; and upon determining that the second sample is greater than the second threshold, applying a second signal to the control input for a second duration less than the first duration. - View Dependent Claims (7, 8, 9, 10)
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11. A method comprising the steps of:
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providing an apparatus having an optical detector, an optical emitter, an amplifier, and an analog-to-digital converter, the amplifier having an input, an output, and a control input, the input responsive to the optical detector, the analog-to-digital converter responsive to the output; illuminating the optical emitter; reading a first sample from the analog-to-digital converter; determining that the first sample is greater than a first threshold; upon determining that the first sample is greater than the first threshold, applying a first signal to the control input for a first duration; reading a second sample from the analog-to-digital converter; determining that the second sample is less than a second threshold; and upon determining that the second sample is less than the second threshold, applying a second signal to the control input for a second duration less than the first duration. - View Dependent Claims (12, 13, 14, 15)
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16. An apparatus comprising:
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an optical detector; an amplifier having an input, an output, and a control input, the input responsive to the optical detector; an optical emitter; an analog-to-digital converter responsive to the output of the amplifier; and a processor responsive to the analog-to-digital converter, the processor to activate the optical emitter, to set a variable to digitally represent a time duration scaling factor, to read a sample from the analog-to-digital converter, to apply a first signal to the control input for a first duration based upon the variable if the sample is less than a first threshold, and to apply a second signal to the control input for a second duration based upon the variable if the sample is greater than a second threshold. - View Dependent Claims (17, 18, 19, 20, 21)
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22. An apparatus comprising:
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an optical detector; an amplifier having an input, an output, and a control input, the input responsive to the optical detector; an optical emitter; an analog-to-digital converter responsive to the output of the amplifier; and a processor responsive to the analog-to-digital converter, the processor to activate the optical emitter, to read a first sample from the analog-to-digital converter, to apply a first signal to the control input for a first duration upon determining that the first sample is less than a first threshold, to read a second sample from the analog-to-digital converter, and to apply a second signal to the control input for a second duration less than the first duration upon determining that the second sample is greater than a second threshold. - View Dependent Claims (23, 24, 25, 26, 27)
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28. An apparatus comprising:
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an optical detector; an amplifier having an input, an output, and a control input, the input responsive to the optical detector; an optical emitter; an analog-to-digital converter responsive to the output of the amplifier; and a processor responsive to the analog-to-digital converter, the processor to activate the optical emitter, to read a first sample from the analog-to-digital converter, to apply a first signal to the control input for a first duration upon determining that the first sample is greater than a first threshold, to read a second sample from the analog-to-digital converter, and to apply a second signal to the control input for a second duration less than the first duration upon determining that the second sample is less than the second threshold. - View Dependent Claims (29, 30, 31, 32, 33)
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Specification