Ricoh Company, Ltd.

Takeo Shirato

Hiroki Takahashi

Tomoaki Hayashi

Shigeru Morinaga

Genichiro Kawamichi

Mitsunobu Gohda

Tomohiro Mizutani

Hirohito Murate

Katsuhiro Tobita

Takatsugu Maeda

Kohtaroh Ikegami

Kohsuke Inoue

Ryuichi Hayashi

Hideharu Miki

Yasuyuki Horie

Kohji Tokuyama

Toshihide Inaba

Mitsuyuki Karasawa

Hiroshi Andoh

A detector includes a light source to irradiate an object with light, a sensor to image a first pattern and a second pattern formed on the object with the light irradiated by the light source to generate image data, the first pattern and the second pattern imaged by the sensor at different times, and a circuit to control the light source to adjust a light quantity of the light according to a type of the object and irradiate the object with the light quantity adjusted according to the type of the object, and calculate a relative position of the object between the first pattern and the second pattern.

Detector, image forming apparatus, reading apparatus, and adjustment method

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

An image recording apparatus includes: a plurality of recording heads driven on a basis of drive waveform data; a data storage that retains parameter sets corresponding to the respective recording heads; a simultaneously driven nozzle count detector that detects, for each of the recording heads, a simultaneously driven nozzle count that represents a count of nozzles to be driven at an identical drive timing based on image data to be recorded on a recording medium; a correction parameter selector that selects, for each of the recording heads, a correction parameter corresponding to the detected simultaneously driven nozzle count from among a plurality of correction parameters included in the parameter set corresponding to the recording head; and a drive waveform data generator that corrects reference waveform data using the correction parameter selected for each of the recording heads and generates the drive waveform data for each of the recording heads.

Image recording apparatus and recording head driving method

A device for detecting a state of a liquid droplet discharged from each of nozzles placed in one or more rows, includes a light emitting element to emit a light beam to the liquid droplet from a nozzle in question, and a pair of light receiving elements disposed on both sides of a beam diameter of the light beam via an optical axis to receive scattered light occurring from the liquid droplet for detecting a state of the discharged liquid droplet on the basis of the scattered light. Either of the pair of the light receiving elements is selected for receiving the scattered light from the liquid droplet discharged from the nozzle according to a positional relation between the nozzle and the pair of light receiving elements.

Device and method for detecting state of discharged liquid droplet and image forming device incorporating such device

A recording head controlling apparatus includes: a restoration unit configured to restore a clock signal and an image signal from a serial signal in which the clock signal and the image signal are superimposed and store it in a storage unit; and a transmission control unit configured to receive a synchronization signal of a driving waveform to drive each piezoelectric element and transmit the image signal stored in the storage unit to a driving unit for driving the piezoelectric element at a timing corresponding to the synchronization signal.

Recording head controlling apparatus, recording head, recording apparatus, and image forming apparatus

An ink jet printing head includes a head portion, an ink tank, a first rigid circuit board, a second rigid circuit board, a flexible printed circuit board, and a connector. The connector is disposed on a top surface of the ink tank, the first rigid circuit board is disposed on a side of the ink tank, the second rigid circuit board is disposed between the ink tank and the head portion, and the flexible printed circuit board is disposed in a bent condition between the first rigid circuit board and the second rigid circuit board.

Ink jet printing head, ink jet printing device, and ink jet printing head manufacturing device

Growing community of inventors

Ibaraki, Japan

Takeo Shirato