US 5,353,387 A · Process for reducing the quantity of ink applied to recording substrates by ink printing devices to prevent image degradation

Abstract

The inventive method reduces the quantity of the actual number of pixels to be printed to attain a given resolution, on average, by half, with each two or pair of adjacent pixels of the original print information being sequentially processed to form a print pixel and a socalled white or unprinted pixel. The arrangement of print pixels and white pixels is effected so as to print a checkerboard pattern. The ink droplets accordingly have the smallest possible substrate or print media contact area so that adjacent ink droplets which are not yet dry are effectively prevented from running together and thereby degrading the resulting image.

Claims10

Dependent claims

A method of printing characters on a print media using a reduced quantity of ink forming each said character with a print head as a plurality of individual pixels, each formed by applying to the media at an individual pixel location one or a plurality of superposed ink color liquids to define a print pixel or by an absence of ink color liquid at the pixel location to define a white pixel, said method comprising the steps of:

(A) arranging the plural pixels for each said character as a series of successive pairs of adjacent pixels and processing each pair of pixels so as to define, from original print information supplied for each pair of pixels, a print pixel and a white pixel to be printed for each said pair of pixels;
and
(B) for each said pair of pixels, applying one or a plurality of superposed ink color liquids to the media in accordance with said print pixel and said white pixel defined in said step (A) to form a checkerboard pattern on the print media.

A method of printing characters on a print media using a reduced quantity of ink and forming each said character with a print head as a plurality of individual pixels, each formed by applying the media at an individual pixel location of an ink to define a print pixel or by an absence of ink at the pixel location to define a white pixel, said method comprising the steps of:

(A) arranging the plural pixels for each said character as a series of successive pairs of adjacent pixels and processing each pair of pixels so as to define, from original print information supplied for each pair of pixels, a print pixel and a white pixel to be printed for each said pair of pixels;
and
(B) for each said pair of pixels, applying an ink to the media in accordance with said print pixel and said white pixel defined in said step (A) to form a checkerboard pattern on the print media.

A method of printing characters on a print media using a reduced quantity of ink and forming each said character with a print head as a plurality of individual pixels, each formed by applying the media at an individual pixel location on ink to define a print pixel or by an absence of ink at the pixel location to define a white pixel, said method comprising the steps of:

(A) arranging the plural pixels for each said character as a series of pairs of adjacent pixels and processing each pair of pixels so as to define, from original print information supplied for each pair of pixels, a print pixel and a white pixel to be printed for each said pair of pixels;
and
(B) for each said pair of pixels, applying an ink to the media in accordance with said print pixel and said white pixel defined in said step (A) to form a checkerboard pattern on the print media.

Dependencies are inferred from the claim text.

Process for reducing the quantity of ink applied to recording substrates by ink printing devices to prevent image degradation

Life of this patent

Process for reducing the quantity of ink applied to recording substrates by ink printing devices to prevent image degradation

Life of this patent

Abstract

Claims10