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US 6,089,766 AGranted
Auto-alignment system for a printing device
AssigneeCanon Kabushiki Kaisha
InventorsAkitoshi Yamada, Hiromitsu Hirabayashi
Life of this patent
Estimating the term…
Abstract
A method for controlling an image printing device includes printing a plurality of test patterns, the density of each test pattern depending upon a measurement object, determining a relationship between image densities of a plurality of the printed test patterns, and acquiring information on the measurement object based on the determined relationship.
Claims33
A method for controlling an image printing device comprising:
- printing a first plurality of test patterns, the density of each of the first plurality of test patterns depending upon a measurement object;
- determining a first relationship between image densities of the first plurality of printed test patterns;
- printing a second plurality of test patterns in accordance with the first relationship;
- determining a second relationship between image densities of the second plurality of printed test patterns;
- and
- acquiring information on the measurement object based on the second relationship.
3 more elements
A method for controlling an image printing device comprising the steps of:
- printing a plurality of test patterns, the density of each of the plurality of test patterns being varied sequentially and the plurality of printed test patterns being specific to a measurement object;
- determining a relationship between image densities of the plurality of printed test patterns;
- and
- acquiring information on the measurement object based on the determined relationship.
1 more element
A printer driver to control a printing device, comprising:
- codes to print a first plurality of test patterns, the density of each of the first plurality of test patterns depending upon a measurement object;
- codes to determine a first relationship between image densities of the first plurality of printed test patterns;
- codes to print a second plurality of test patterns in accordance with the first relationship;
- codes to determine a second relationship between image densities of the second plurality of printed test patterns;
- and
- codes to acquire information on the measurement object based on the second relationship.
3 more elements
A printer driver to control a printing device, comprising:
- codes to print a plurality of test patterns, the density of each of the plurality of test patterns being varied sequentially and the plurality of printed test patterns being specific to a measurement object;
- codes to determine a relationship between image densities of the plurality of printed test patterns;
- and
- codes to acquire information on the measurement object based on the determined relationship.
1 more element
A method for controlling a printing device using a scanning printhead to print upon a recording medium, comprising:
- printing a first plurality of test patterns upon the recording medium, the density of each of the first plurality of test patterns depending upon a measurement object;
- determining a first relationship between image densities of the first plurality of printed test patterns;
- printing a second plurality of test patterns in accordance with the first relationship;
- determining a second relationship between image densities of the second plurality of printed test patterns;
- and
- acquiring information on the measurement object based on the second relationship.
3 more elements
A method for controlling a printing device using a scanning printhead to print upon a recording medium, comprising the steps of:
- printing a plurality of test patterns upon the recording medium, the density of each of the plurality of test patterns depending upon an amount of registration misalignment in reciprocal scanning directions to the printhead;
- determining a relationship between image densities of the plurality of the printed test patterns;
- and
- acquiring information on the amount of registration misalignment based on the determined relationship.
1 more element
A method for controlling a printing device using a scanning printhead to print upon a recording medium, comprising the steps of:
- printing a plurality of test patterns upon the recording medium by multiple printheads, the density of each of the plurality of test patterns depending upon an amount of registration misalignment in reciprocal scanning directions to the multiple printheads;
- determining a relationship between image densities of the plurality of the printed test patterns;
- and
- acquiring information on the amount of registration misalignment based on the determined relationship.
1 more element
A method for controlling a printing device using a scanning printhead to print upon a recording medium, comprising the steps of:
- printing a plurality of test patterns upon the recording medium by multiple printheads, the plurality of test patterns depending upon an amount of registration misalignment in reciprocal scanning directions of the multiple printheads and the density of each of the plurality of test patterns being varied sequentially based on an area of a measurement object;
- determining a relationship between image densities of a plurality of the printed test patterns being specific to the area of the measurement object;
- and
- acquiring information on the amount of registration misalignment based on the determined relationship.
1 more element
An image printing apparatus comprising:
- printing means for printing a first plurality of test patterns, the image density of each of the first plurality of test patterns depending upon a measurement object;
- determining means for determining a relationship between image densities of a plurality of the printed test patterns;
- print controlling means for printing a second plurality of test patterns in accordance with the relationship between image densities of the first plurality of printed test patterns;
- and
- means for acquiring information on the measurement object based on the relationship determined by said determining means.
2 more elements
An image printing apparatus having multiple printheads, comprising:
- printing means for printing, using the multiple printheads cooperatively, a basic pattern and a plurality of patterns, each of which are constructed by shifting aspects of the basic pattern by a predetermined distance in a direction of reciprocal scanning;
- determining means for determining a relationship between densities of a plurality of the patterns printed by said printing means;
- and
- acquiring means for acquiring information on positional misalignment of the multiple printheads in the direction of reciprocal scanning based on the determined relationship.
1 more element
An image printing apparatus comprising:
- printing means for printing a plurality of patterns having a continuously changing density relationship;
- determining means for determining a relationship between the densities of the plurality of the patterns printed by said printing means;
- and
- acquiring means for acquiring information on output density relationships of printing elements based on the determined relationship.
1 more element
A method for controlling a printing device using a scanning printhead to print upon a recording medium, comprising the steps of:
- printing a plurality of test patterns, the test patterns having density changing in a scanning direction of the printhead, upon the recording medium by using each of a plurality of areas divided in the printhead;
- determining a relationship between densities of a plurality of the printed test patterns;
- and
- acquiring information on positional misalignment in the scanning direction of the printhead based on the determined relationship.
1 more element
An image print method for printing an image by recording dots along a scanning of a printhead, comprising the steps of:
- printing a plurality of test patterns having a plurality of dots and a plurality of spaces in at least a predetermined direction, the plurality of test patterns having a density depending on an amount of registration misalignment of the printhead;
- determining a relationship between densities of the plurality of printed test patterns;
- and
- acquiring an amount of registration misalignment on the plurality of dots of the printhead based on the determined relationship.
1 more element
Dependencies are inferred from the claim text.