Method for manufacturing printing device
First Claim
1. A method for manufacturing a printing device that includes a dither mask that is used in a halftone process and in which thresholds are stored in a plurality of storage elements comprising:
- configuring the printing device that has a plurality of printing heads arranged in a printing region so that a region of a first one of the printing heads and a region of a second one of the printing heads are adjacent to each other and overlap each other in a direction in which the printing heads are arranged, other regions of the first and second printing heads do not overlap each other in the direction in which the printing heads are arranged, and the printing heads perform printing and eject ink while moving the printing heads relative to the printing medium;
assigning, to some of the storage elements of the dither mask, a first dither mask region that is used for a printing portion of the first printing head, and assigning, to the other storage elements of the dither mask, a second dither mask region that is used for a printing portion of the second printing head, the printing portion of the first printing head being configured to perform printing and included in the overlapping region and non-overlapping region of the first printing head, the printing portion of the second printing head being configured to perform printing and included in the overlapping region and non-overlapping region of the second printing head;
preparing predetermined evaluation values that are used to evaluate the dither mask and each vary depending on whether a threshold that is used for any of the overlapping regions is stored in the first dither mask region or the second dither mask region;
generating the dither mask by determining, using the predetermined evaluation values, the storage elements in which the thresholds are to be stored under the condition that dots are permitted to be formed by the first and second printing heads at the same position in a printing region that corresponds to the overlapping regions; and
storing the generated dither mask in a storage medium of the printing device so that a computer is capable of reading the dither mask.
1 Assignment
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Accused Products
Abstract
A dither mask is used in a halftone process that is performed by the printer that includes the preceding and following heads. The dither mask includes preceding and following head storage regions. The preceding head storage region is used for a printing portion of the preceding head. The following head storage region is used for a printing portion of the following head. The dither mask is generated by determining, using comprehensive evaluation values, storage elements in which thresholds are to be stored under the condition that dots are permitted to be formed by the preceding and following heads at the same position in the region corresponding the overlapping regions.
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Citations
16 Claims
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1. A method for manufacturing a printing device that includes a dither mask that is used in a halftone process and in which thresholds are stored in a plurality of storage elements comprising:
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configuring the printing device that has a plurality of printing heads arranged in a printing region so that a region of a first one of the printing heads and a region of a second one of the printing heads are adjacent to each other and overlap each other in a direction in which the printing heads are arranged, other regions of the first and second printing heads do not overlap each other in the direction in which the printing heads are arranged, and the printing heads perform printing and eject ink while moving the printing heads relative to the printing medium; assigning, to some of the storage elements of the dither mask, a first dither mask region that is used for a printing portion of the first printing head, and assigning, to the other storage elements of the dither mask, a second dither mask region that is used for a printing portion of the second printing head, the printing portion of the first printing head being configured to perform printing and included in the overlapping region and non-overlapping region of the first printing head, the printing portion of the second printing head being configured to perform printing and included in the overlapping region and non-overlapping region of the second printing head; preparing predetermined evaluation values that are used to evaluate the dither mask and each vary depending on whether a threshold that is used for any of the overlapping regions is stored in the first dither mask region or the second dither mask region; generating the dither mask by determining, using the predetermined evaluation values, the storage elements in which the thresholds are to be stored under the condition that dots are permitted to be formed by the first and second printing heads at the same position in a printing region that corresponds to the overlapping regions; and storing the generated dither mask in a storage medium of the printing device so that a computer is capable of reading the dither mask. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for manufacturing a printing device that includes a dither mask that is used in a halftone process and in which thresholds are stored in a plurality of storage elements comprising:
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configuring the printing device that includes a non-overlapping region and an overlapping region, ejects ink while moving a printing head relative to a printing medium in a main scanning direction and an auxiliary scanning direction, forms a part of a raster by performing main scanning one time in a printing region corresponding to the non-overlapping region, and forms the other part of the raster by continuously performing first and second main scanning in a printing region corresponding to the overlapping region, the raster being a dot line that extends in the main scanning line; assigning, to some of the storage elements of the dither mask, a first dither mask region that is used for a printing portion that is included in the overlapping region and the non-overlapping region and performs printing with the first main scanning, and assigning, to the other storage elements of the dither mask, a second dither mask region that is used for a printing portion that is included in the overlapping region and the non-overlapping region and performs printing with the second main scanning; preparing predetermined evaluation values that are used to evaluate the dither mask and each vary depending on whether a threshold that is used for the overlapping region is stored in the first dither mask region or the second dither mask region; generating the dither mask by determining, using the predetermined evaluation values, the storage elements in which the thresholds are to be stored under the condition that dots are permitted to be formed by the first and second main scanning at the same position in the printing region that corresponds to the overlapping region; and storing the generated dither mask in a storage medium of the printing device so that a computer is capable of reading the dither mask. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification