Printer, print control program, medium having print control program recorded therein, and printing method
First Claim
1. A printer of the type having an ink cartridge mount to carry a plurality of ink cartridges thereon and a printing mechanism for printing on printing paper with inks received from said ink cartridges, wherein said ink cartridge mount is so designed as to carry at least three ink cartridges filled respectively with three chromatic color inks having three chromatic colors and a secondary ink cartridge filled with a chromatic color ink which has a lower spectral reflectance than each of the three chromatic colors in a region of wavelengths in which a spectral reflectance produced by a gray color comprised of a combination of the three chromatic colors has a highest portion in a range of visible wavelengths.
1 Assignment
0 Petitions
Accused Products
Abstract
Colors look differently when observed under sunlight and room light. At least three chromatic colors and additional chromatic colors differing in hue from said three colors are used in combination. The additional colors are those which have a spectral reflectance which smoothens waviness in the spectral reflectance curve of the nearly achromatic color produced by the combination of the three chromatic colors. As the result, the combination of the colors gives rise to a color which has almost uniform spectral reflectance over the entire region of wavelengths. Thus it is possible to obtain printing which is less vulnerable to change in color under different light sources.
28 Citations
12 Claims
- 1. A printer of the type having an ink cartridge mount to carry a plurality of ink cartridges thereon and a printing mechanism for printing on printing paper with inks received from said ink cartridges, wherein said ink cartridge mount is so designed as to carry at least three ink cartridges filled respectively with three chromatic color inks having three chromatic colors and a secondary ink cartridge filled with a chromatic color ink which has a lower spectral reflectance than each of the three chromatic colors in a region of wavelengths in which a spectral reflectance produced by a gray color comprised of a combination of the three chromatic colors has a highest portion in a range of visible wavelengths.
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10. A computer readable medium having stored thereon a print control program to control printing with a printer having an ink cartridge mount capable of mounting three main ink cartridges filled respectively with three chromatic color inks having three chromatic colors and a secondary ink cartridge filled with a chromatic color ink which has a higher spectral reflectance than each of the three chromatic colors in a region of wavelengths in which a spectral reflectance produced by a gray color comprised of a combination of the three chromatic colors has a lowest portion in a range of visible wavelengths, and a printing mechanism for printing on printing paper with inks received from said ink cartridges, wherein said print control program causes a computer to realize an image data acquisition function to acquire image data consisting of pixels arranged in a dot matrix, a color conversion table storing function to store in a prescribed storage area the color conversion table which specifies the correspondence between said image data and the ink color image data which specifies the color of pixels with said three chromatic colors and the color of the ink held in the secondary ink cartridge, a color conversion function to convert said image data into said ink color image data by referencing said color conversion table, a printing data generating function to generate printing data to perform printing with colors specified by the ink color image data which has undergone said color conversion, and a printing data output function to output said printing data so as to control the driving of said printing mechanism.
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11. A printing method for a printer having an ink cartridge mount to carry a plurality of ink cartridges thereon and a printing mechanism for printing on printing paper with inks received from said ink cartridges, said printing method comprising:
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providing an ink cartridge mount designed to carry at least three ink cartridges filled respectively with three chromatic color inks having three chromatic colors and a secondary ink cartridge filled with a chromatic color ink which has a lower spectral reflectance than each of the three chromatic colors in a region of wavelengths in which a spectral reflectance produced by a gray color comprised of a combination of the three chromatic colors has a highest portion in a range of visible wavelengths; and printing on printing paper with inks received from said ink cartridges.
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12. A printer of the type having an ink cartridge mount to carry a plurality of ink cartridges thereon and a printing mechanism for printing on printing paper with inks received from said ink cartridges, wherein said ink cartridge mount is so designed as to carry at least three ink cartridges filled respectively with three chromatic color inks having three chromatic colors and a secondary ink cartridge filled with a chromatic color ink which has a higher spectral reflectance than each of the three chromatic colors in a region of wavelengths in which a spectral reflectance produced by a gray color comprised of a combination of the three chromatic colors has a lowest portion in a range of visible wavelengths.
Specification