Ricoh Company, Ltd.

Takatsugu Maeda

Tomohiro Mizutani

Katsuhiro Tobita

Satoshi Ueda

Toshihiro Tsukagoshi

Toshihiro Nakagaki

Hiroki Takahashi

Hirohito Murate

Takeo Shirato

Kohsuke Inoue

Kohtaroh Ikegami

Ryuichi Hayashi

Yasuyuki Horie

A droplet discharge apparatus includes a discharge device, a plurality of waveform generation units, a plurality of correction units, and a drive unit. The discharge device discharges droplets of a plurality of droplet types according to a plurality of drive waveforms. The plurality of waveform generation units individually generate drive waveforms used to discharge each of the plurality of droplet types. The plurality of correction units individually correct the drive waveforms generated by each of the plurality of waveform generation units, using correction magnifications different corresponding to the drive waveforms generated by the plurality of waveform generation units, to generate correction waveforms. The drive unit causes the discharge device to discharge the droplets according to corrected drive waveforms generated by individually switching the drive waveform corresponding to the plurality of droplet types to the correction waveforms.

Droplet discharge apparatus

A liquid ejection apparatus includes a transmission-side control device and a reception-side control device. The transmission-side control device is configure to: divide image data into a plurality of division data; add check data for error detection to each of the plurality of division data; and transmit, to a reception-side control device, each of the plurality of division data to which respective check data are added. The reception-side control device is configured to: receive each of the plurality of division data to which the respective check data are added; perform error detection on each of the plurality of division data, using check data added to the division data; and transmit, to a drive device configured to control a drive element, division data on which a process of error detection is performed, in parallel with a process of transmitting division data by the transmission-side control device.

Liquid ejection apparatus and data transmission method

There is provided a head driving device for causing a head to discharge droplets. The device includes a drive circuit, a first drive waveform generation circuit, a second drive waveform generation circuit, and a correction circuit. The drive circuit is configured to drive the head based on a plurality of drive waveforms to discharge the droplets. The first drive waveform generation circuit configured to generate a first drive waveform of the plurality of drive waveforms. The second drive waveform generation circuit is configured to generate a second drive waveform of the plurality of drive waveforms. The correction circuit is configured to correct the first drive waveform and the second drive waveform with reference to an intermediate potential.

Head driving device and image forming apparatus including same

A controller for a liquid discharging device generates a correction chart including a reference pattern and a correction part, using a liquid discharged from a liquid discharge head, the liquid discharge head having a plurality of nozzles that are arranged to form a nozzle array. The controller drives a predetermined number of the plurality of nozzles to form the reference pattern on the recording sheet along a direction of the nozzle array, the predetermined number being a number equal to or less than a total number of the plurality of nozzles of the nozzle array, and drives a number of the plurality of nozzles that is different than the predetermined number of nozzles driven in forming the reference pattern, to form the correction pattern on the recording sheet along the direction of the nozzle array.

Liquid discharging device, correction chart generating method, and recording medium

A sheet conveying device includes a sheet skew corrector to correct a skew of a leading end of a sheet inclining from a sheet conveyance direction and a pair of registration rollers disposed upstream of the sheet skew corrector in the sheet conveyance direction. The pair of registration rollers freely contacts and separates from each other. The pair of registration rollers conveys the sheet downstream of the sheet skew corrector in the sheet conveyance direction when driven at a prescribed time. A pair of conveyance rollers is placed upstream of the pair of registration rollers in the sheet conveyance direction. The pair of conveyance rollers continuously sandwiches the sheet from when the sheet with the skew corrected is sandwiched by the pair of registration rollers to when a trailing end of the sheet passes between the pair of conveyance rollers.

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Kanagawa, Japan

Takatsugu Maeda