Fixer usage generation technique for inkjet printers
AssigneeHewlett-Packard Company
InventorsMark D. Lund, Ngoc-Diep T. Nguyen, Charles S. Woodruff
Life of this patent
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Abstract
Disclosed is a system in an inkjet printer for determining the amount of a fixer to be applied to a medium. The system comprises a fixer generation circuit where the fixer generation circuit determines an amount of a fixer to be applied to a dot location on a medium based on an amount of ink to be applied to the dot location. A bloom encoder circuit is also disclosed for identifying amounts of fixer to be deposited adjacent to dot locations containing ink.
Claims29
A system for use by an inkjet printer, said system receiving ink printing data, said system comprising:
- a fixer amount generation circuit receiving said data, said circuit calculating a variable amount of fixer to be applied to a location on a medium depending on a quantity of ink to be applied to said medium as expressed by said printing data.
A system for use by an inkjet printer, said system receiving ink printing data, said system comprising:
- a fixer amount generation circuit receiving said data, said circuit calculating a variable amount of fixer to be applied to a location on a medium depending on a quantity of ink applied to said medium, the fixer amount generation circuit including one or more fixer amount look-up tables and including an adder circuit having inputs coupled to said one or more look-up tables and including a threshold detection circuit having inputs coupled to an output of said adder circuit, said one or more look-up tables performing a multiply function.
A system for use by an inkjet printer, said system receiving ink printing data, said system comprising:
- a fixer amount generation circuit receiving said data, said circuit calculating a variable amount of fixer to be applied to a location on a medium depending on a quantity of ink applied to said medium;
- and
- an error correction circuit including a subtraction circuit for subtracting a value corresponding to a deposited fixer amount from a substantially optimum fixer amount to obtain an error value and including a delay element coupled to the subtraction circuit for providing said error value to a calculated fixer amount for a next location on said medium.
A system for use by an inkjet printer, said system receiving ink printing data, said system comprising:
- a fixer amount generation circuit receiving said data, said circuit calculating a variable amount of fixer to be applied to a location on a medium depending on a quantity of ink applied to said medium;
- and
- a bloom generation circuit for applying bloom, wherein bloom is defined as fixer applied to locations on said medium where no ink is to be applied.
A system for applying fixer to a medium in an inkjet printer comprising:
- one or more look-up tables receiving ink printing data, wherein said one or more look-up tables determine an amount of fixer to be applied to the medium;
- an adder coupled to the one or more look-up tables, said adder outputting a value corresponding to a substantially optimum amount of fixer to be applied to the medium;
- a threshold detection circuit coupled to the adder for quantizing said value output from said adder;
- and
- an error correction circuit connected to said adder for supplying a fixer amount error value to said adder.
A method for controlling application of a fixer in an inkjet printer, comprising:
- receiving image data;
- determining a substantially optimal amount of the fixer in response to a quantity of ink as expressed by the image data;
- and
- applying a quantized amount of the fixer to a medium.
A method for controlling application of a fixer in an inkjet printer, comprising:
- receiving image data;
- determining a substantially optimal amount of the fixer in response to the image data;
- and
- applying a quantized amount of the fixer to a medium, wherein determining a substantially optimal amount of the fixer includes addressing one or more look-up tables and includes adding outputs of the one or more look-up tables to an error value to produce said substantially optimal amount of fixer to be applied to the medium.
A method for controlling application of a fixer in an inkjet printer, comprising:
- receiving image data;
- determining a substantially optimal amount of the fixer in response to the image data;
- applying a quantized amount of the fixer to a medium;
- and
- depositing an amount of fixer on said medium where no ink is to be printed to reduce blooming.
A method for applying fixer to a medium in an inkjet printer comprising:
- receiving image data;
- determining from the image data each dot location that will contain at least one drop of ink;
- calculating an amount of fixer to be applied to dot locations that will contain at least one drop of ink;
- determining from said image data each dot location that will not contain any drops of ink but is within a predetermined distance from each dot location that will contain at least one drop of ink;
- applying fixer to at least some dot locations that will contain at least one drop of ink;
- and
- applying fixer to at least some dot locations that will not contain any drops of ink but are within said predetermined distance from each dot location that will contain at least one drop of ink.
Dependencies are inferred from the claim text.