Ricoh Company, Ltd.

Shinichiroh Osanai

Norimasa Sohgawa

Kohta Akiyama

Satomi Araki

Chikako Hatta

A liquid discharge head includes: a nozzle plate having multiple nozzle holes from which a liquid is to be discharged in a liquid discharge direction, the multiple nozzle holes arrayed in a nozzle array direction orthogonal to the liquid discharge direction; and a pressure chamber communicating with the multiple nozzle holes, wherein a volume Vof a virtual hemisphere Sis 5×10μmor more and 5×10μmor less, and a volume Vof a virtual hemisphere Sis five times or more and less than 1000 times the volume V, each of the multiple nozzle holes has a virtual center line, and the nozzle plate has an inner surface defining a wall of the pressure chamber, the inner surface having multiple openings of each of the multiple nozzle holes.

Liquid discharge head and liquid discharge apparatus

A liquid discharging apparatus includes a liquid discharging head that discharges liquid from a nozzle, and a driving signal substrate that inputs, to the liquid discharging head, a driving signal according to waveform data. The liquid discharging head includes a driving element that drives the nozzle, switching elements connected to the driving element, a signal transmitter connected to the driving element via the switching elements and including signal lines through which the driving signal is transmitted according to waveform data, and a potential difference detector that detects a potential difference based on an intermediate potential of the driving signal transmitted through each signal line. The liquid discharging apparatus generates a correction signal based on the potential difference; corrects the waveform data based on the correction signal; generates the driving signal based on the corrected waveform data; and outputs the generated driving signal to the corresponding signal line.

Liquid discharging apparatus, liquid discharging head, and method for driving liquid discharging head

A device to discharge liquid includes a liquid discharging head to discharge the liquid and a drive waveform generating device to generate and output a drive waveform including continuous multiple drive pulses to discharge the liquid from the liquid discharging head that are continuously arranged in chronological order to form a single droplet. The continuous multiple drive pulses include an inflation waveform element to inflate an individual liquid chamber of the liquid discharging head and a contraction waveform element to contract the inflated individual liquid chamber to discharge the liquid. When the wave element between the continuous multiple drive pulses is determined as the holding wave element between pulses, the voltage held by the holding waveform element is higher than the initial voltage of the inflation waveform element of the first drive pulse and the ending voltage of the contraction waveform element of the last drive pulse.

Growing community of inventors

Kanagawa, Japan

Shinichiroh Osanai