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US 2014/0231630 A1Published application
Method and apparatus for image sensor calibration
AssigneeSTMicroelectronics (Research & Development) Limited
InventorsBruce Rae, John Kevin Moore
Life of this patent
Estimating the term…
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.
Claims27
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.
4 more elements
A method, comprising:
- 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.
4 more elements
Dependencies are inferred from the claim text.