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US 2006/0268098 A1Published application
System and method for reducing non-linearity errors between two imaging stations
AssigneeXerox Corporation
InventorsThomas Baretsky, Rosario Bracco
Life of this patent
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Abstract
A system and method for spatially matching the output of two imaging stations in an electro-photographic device by using a second order polynomial curve and a third order polynomial curve to approximate the non-linearity errors between the two imaging stations and using the second order polynomial curve and the third order polynomial curve to modify the frequency of a pixel clock.
Claims20
A multiple image station printer device comprising:
- a photosensitive medium;
- a first imaging station for generating a plurality of reference lines on the photosensitive medium;
- a second imaging station for generating a plurality of indicator lines on the photosensitive medium based upon timing pulses from a pixel clock;
- a memory for storing a plurality of polynomial curve correction data;
- a non-linearity error identifier for identifying at least one of the plurality of polynomial curve correction data based upon at least one correlation between the plurality of reference lines and the plurality of indicator lines;
- and
- a pixel clock modifier for modifying the timing of the timing pulses from the pixel clock based upon the identified at least one of the plurality of polynomial curve correction data to adjust the location of pixels generated by the second imaging station thereby reducing scan line non-linearity errors between the first imaging station and the second imaging station.
4 more elements
A method of reducing scan line non-linearity errors in a device comprising:
- storing a plurality of second order polynomial curve profiles;
- identifying one of the plurality of second order polynomial curve profiles;
- storing a plurality of third order polynomial curve profiles;
- identifying one of the plurality of third order polynomial curve profiles;
- and
- modifying the frequency of a pixel clock based upon the identified one of the plurality of second order polynomial curve profiles and the identified one of the plurality of third order polynomial curve profiles.
3 more elements
A method of reducing scan line non-linearity errors in a multistage imaging device comprising:
- generating a first visible scan line non-linearity identifier with the device;
- generating a second visible scan line non-linearity identifier with the device;
- generating a third visible scan line non-linearity identifier with the device;
- identifying a second order polynomial curve profile based upon the first visible scan line non-linearity identifier;
- identifying a third order polynomial curve profile based upon the second visible scan line non-linearity identifier and the third visible scan line non-linearity identifier;
- and
- modifying the frequency of a pixel clock in the device using the second order polynomial curve profile and the third order polynomial curve profile.
4 more elements
Dependencies are inferred from the claim text.