METHOD AND APPARATUS FOR IMAGE SENSOR CALIBRATION
First Claim
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1. An apparatus, comprising:
- an array of photon sensitive devices, each photon sensitive device configured to be provided with a voltage when in use;
a digital counter configured to receive output from the array of photon sensitive devices; and
a controller configured to control a voltage source to apply at least two calibration voltages to the photon sensitive devices of the array in a calibration mode and further configured to determine said voltage to be provided by the voltage source in a normal mode of operation by;
receiving output counter values from the digital counter for each of the at least two calibration voltages during calibration mode; and
using the received counter values to determine the voltage to be provided by the voltage source in the normal mode of operation.
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Abstract
A photon sensitive device is provided with a voltage. A controller is configured to control a voltage source so as to cause at least one calibration voltage to be applied to the photon sensitive device in a calibration mode in order to determine the voltage to be provided by the voltage source in a normal mode of operation.
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Citations
27 Claims
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1. An apparatus, comprising:
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an array of photon sensitive devices, each photon sensitive device configured to be provided with a voltage when in use; a digital counter configured to receive output from the array of photon sensitive devices; and a controller configured to control a voltage source to apply at least two calibration voltages to the photon sensitive devices of the array in a calibration mode and further configured to determine said voltage to be provided by the voltage source in a normal mode of operation by; receiving output counter values from the digital counter for each of the at least two calibration voltages during calibration mode; and using the received counter values to determine the voltage to be provided by the voltage source in the normal mode of operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method, comprising:
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controlling a voltage source to apply at least two calibration voltages to a photon sensitive device in a calibration mode; counting in a counter coupled to an output of the photon sensitive device counter values for each of the at least two calibration voltages; and determining a voltage to be provided by the voltage source in a normal mode of operation, wherein determining comprises; receiving counter values output from the counter for each of the at least two calibration voltages; and using the received counter values to determine the voltage to be provided by the voltage source in the normal mode of operation. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification