Ricoh Company, Ltd.

Daiki Marumo

Shotaro Takeuchi

Takahiko Sugiura

Takayuki Ito

Yosuke Saito

Kenta Takahashi

Masanori Hirano

Kimito Abe

Hironobu Murai

Kyohei Hamada

A liquid discharge apparatus, a method of discharging liquid, and a recording medium storing a program for causing a computer to execute the method. The liquid discharge apparatus and the method includes obtaining image data to be printed, performing dithering to achieve masking and halftone processing on the image data to generate print data, and controlling movement of a discharge head and discharge of ink based on the print data. The controlling includes increasing a ratio of a number of ink dots continuously discharged onto a recording medium in a grayscale on a shadow side to a total number of ink dots discharged onto the recording medium in one-time scanning by the discharge head in one line to be greater than a ratio of a number of ink dots continuously discharged onto the recording medium in a grayscale on a highlight side to the total number of ink dots.

Liquid discharge apparatus, liquid discharging method, and recording medium storing program for controlling banding and granularity

A liquid discharge apparatus includes a conveyance roller, a liquid discharge head, and a control device. The control device controls the head to discharge liquid onto a medium X times in the main scanning direction and Y times in the sub-scanning direction and controls the roller such that a position of a droplet on the medium discharged by an m-th discharge and a position of another droplet on the medium discharged by an (m+Y)-th discharge are same in the sub-scanning direction, where m is an integer not smaller than one and not greater than ((X&#x2212;1)&#xd7;Y). Where P is a circumferential length of the roller and L is a difference in a conveyance distance in the sub-scanning direction when the m-th discharge is compared with the (m+Y)-th discharge, the following relation is satisfied:=(+(&#x394;&#x3b8;/2&#x3c0;))&#xd7;

Liquid discharge apparatus and image forming method

A liquid discharge apparatus includes a color component divided data generation unit, a dot data generation processing unit, and a dot data segmentation processing unit. The color component divided data generation unit generates color component divided data from image data. The dot data generation processing unit applies a dot data generation mask to the color component divided data to generate dot data. The dot data segmentation processing unit applies a segmentation mask to the dot data to generate scan data. A width of the segmentation mask in a main scanning direction is different from a width of the dot data generation mask in the main scanning direction.

Liquid discharge apparatus and liquid discharge method

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Kanagawa, Japan

Daiki Marumo