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US 8,411,182 B2Granted
System for controlling integration times of photosensors in an imaging device
AssigneeXerox Corporation
InventorScott L. Tewinkle
Life of this patent
Estimating the term…
Abstract
A photosensor chip, such as used in a hard-copy scanner, reads out image data in repeated cycles. With each cycle an on-board counter counts to a predetermined number and resets to zero. When the clock count reaches certain numbers, integration events are initiated with regard to different subsets of photosensors on the chip. The start and stop times of the integrations within each cycle can thus be adjusted via software instructions.
Claims17
An imaging apparatus, comprising:
- a first subset of photosensors;
- a counter for repeatedly outputting a clock count to a predetermined maximum number;
- and
- a controller, the controller causing the first subset of photosensors to change an integration state in response to the clock count reaching a predetermined first number.
1 more element
An imaging apparatus, comprising:
- a first subset of photosensors, the first subset of photosensors being sensitive to a first range of wavelength and forming a first linear array;
- a second subset of photosensors, the second subset of photosensors being sensitive to a second range of wavelength and forming a second linear array;
- a counter for repeatedly outputting a clock count to a predetermined maximum number;
- and
- a controller, the controller causing the first subset of photosensors to change an integration state in response to the clock count reaching a predetermined first number and causing the second subset of photosensors to change an integration state in response to the clock count reaching a predetermined second number;
- the first subset of photosensors, second subset of photosensors, and controller being defined in a single chip;
- at least a portion of a programming path for loading values for the predetermined first number and the predetermined second number;
- and
- at least one register for retaining values for the predetermined first number and the predetermined second number.
6 more elements
An imaging apparatus, comprising:
- a first chip, having a first subset of photosensors;
- a second chip, having a second set of photosensors;
- at least one counter for repeatedly outputting a clock count to a predetermined maximum number;
- and
- the first chip outputting a set of image signals from the first subset of photosensors in response to the clock count reaching a predetermined first number and the second chip outputting a set of image signals from the second subset of photosensors in response to the clock count reaching a predetermined second number.
2 more elements
Dependencies are inferred from the claim text.