Konica-minolta Holdings, Inc.

Konica Corporation

Hiroaki Arakawa

Yoshikazu Maekawa

Tetsuo Uno

Takayuki Kato

Kazuo Asano

Toyoaki Sugaya

Osamu Murata

Yutaka Aoki

Takahiro Matsuzawa

Shingo Tsubotani

Masakazu Date

Yasuhiro Matsui

Takashi Horiyama

Kenzo Nakanishi

Akihiro Taguchi

Minoru Yasuda

Tatsuro Ooishi

An inkjet recording apparatus includes a recording head having three rows of nozzles which are three-phase driven and arranged in a staggered arrangement. The nozzles are arranged in the main scanning direction at an interval of L/3, where L is a pixel pitch, and each nozzle row is ejection-driven in the sequence from the last nozzle row to the forward nozzle row in the moving direction of the recording head. The recording head scans at a moving speed of 2&#xd7;L&#xd7;f, where f is an ejection frequency per nozzle row. After the completion of one scan, the recording medium is moved a distance of predetermined multiples of the pixel pitch in the sub-scanning direction, and in the next scan, ink is ejected onto the recording medium at pixel positions other than the pixel position on which the ink has landed in preceding scans.

Inkjet recording apparatus

Provided is an ink jet head driving apparatus which can highly accurately control jetting timing separately for each of a plurality of nozzles of a head without increasing the number of signal lines and can change the jetting timing for each jetting cycle.

Ink jet head driving apparatus

An inkjet head driving apparatus, wherein serial data indicating emission or non emission of nozzles respectively for a plurality of heads, is latched and memorized, and the nozzles are driven respectively based on the data memorized, the inkjet head driving apparatus having: an emission timing signal outputting device disposed in common for a plurality of heads so as to output a plurality of emission timing signals in one emission cycle; a setting device disposed respectively for the plurality of the heads so as to select the sequential emission timing signals at which emission starts synchronously, among the emission timing signals outputted from the emission timing signal outputting device in one emission cycle.

Driving apparatus of inkjet head

An ink-jet recording apparatus, including plural ink-jet head units which are daisy-chain-connected to a control section and eject ink; and the control section which sends serial driving data to the plural ink-jet head units, wherein each ink-jet head unit includes a head drive control section, which includes: a serial/parallel conversion section which converts the serial driving data inputted from a pre-ceding ink-jet head unit to parallel driving data, and sends the parallel driving data to a post-ceding ink-jet head unit; an identification information setting section which sets identification information for selecting a signal essential to drive the ink-jet head unit, a data extracting section which selects the signal essential to drive the ink-jet head unit, based on identification information, and a data processing section which conducts process for driving the ink-jet head unit, by the signal essential to drive the ink-jet head unit selected by the data extracting section.

Ink-jet recording apparatus and data transfer apparatus

A voltage control device for a liquid injection head corrects a voltage supplied to the liquid injection head.

Voltage control device, voltage control method, and liquid injection device

An ink droplet detection apparatus containing: a plurality of nozzle lines each containing multiple nozzles which eject ink droplets; a beam radiator for radiating a detection beam so as to cross a path of the ink droplets and forming a light path of the detection beam so as to be along two or more the nozzle lines being detected; two or more beam receivers corresponding to the nozzle lines being detected for receiving the beam radiated from the beam radiator and detecting a droplet ejected from the nozzle by determining whether the ink droplet ejected from each nozzle intercepts the light path or not; an ejecting control circuit for controlling the nozzles so as that the ink droplets are ejected from each nozzle; and a controller for controlling the ejecting control circuit by sending the ejecting control circuit the same ejecting start signals for each nozzle lines being detected so as that the ejecting timing of the ink droplets to be ejected from each nozzle of the plurality of the nozzle lines being detected is synchronized.

Ink droplet detection apparatus

There is described an image recording apparatus, which makes it possible to improve the operation efficiency of the host computer for high-speed image recording. The apparatus includes: a recording head having a plurality of ink emitting nozzles; a plurality of storing sections to store ink emitting data for every unit ink emitting action; a controller to selectively designate a specific storing section from the plurality of storing sections corresponding to a current progress status of ink emitting actions, and to sequentially read out the ink emitting data from the specific storing section for every unit ink emitting action, in order to depict the specific printing pattern; a shift register to sequentially store the ink emitting data, read by the controller, for every unit ink emitting action; and a head driving section to sequentially drive the recording head for every unit ink emitting action, based on the ink emitting data.

Image recording apparatus

An inkjet printer, including a recording head having a nozzle to jet ink droplets, a control section to control jetting of the ink droplets from the nozzle of the recording head at predetermined driving conditions for jetting the ink droplets, a velocity detecting section to detect ink droplets jetting velocity from the nozzle of the recording head, a temperature detecting section to detect temperature of the recording head or ambient temperature of the recording head, a first changing section to change the driving conditions to alter the ink droplets jetting velocity to a targeted velocity based on detected results of the velocity detecting section, and a second changing section to change the driving conditions at a time differing from a time of the first changing section to alter the ink droplets jetting velocity to the targeted velocity based on the detected results of the temperature detecting section.

Inkjet printer

An inkjet printer having: recording headincluding a plurality of nozzles; defective nozzle detection meansfor detecting a defective nozzle from which ink droplets are not ejected for each of the of aforesaid recording head; a determination means for determining a level of a defective nozzle occurrence situation that is detected by aforesaid defective nozzle detection means; and an operation control means for controlling the execution of operations of a printer based on the determination result in aforesaid determination means.

An inkjet recording apparatus including: a recording head; a recording medium moving section; a position information detecting section synchronized with a movement of the recording medium moving section; a mark recording section for recording a mark on the recording medium; a mark detecting section for detecting the mark recorded; an analog-to-digital conversion section for converting an output signal; and a control section for obtaining a reference mark position of the mark based on a signal outputted from the mark detecting section and the position information detected, and for determining the amount of recording medium movement on the basis of reference detection position of the mark; wherein analog-to-digital conversion is applied to the output signal from the mark detecting section to get a sampling data, in exact timing with an output of position information, and the control section calculates the reference detection position from the sampling data.

Inkjet recording apparatus and recording medium movement control method

An inkjet recording apparatus includes a recording head, a recording head moving device, and a recording medium feeding device. A mark recording device prints a predetermined mark on the recording medium by ejecting ink droplets, and a mark detecting device detects the mark printed by the mark recording device. The mark detecting device is arranged at a predetermined distance from the recording medium, and is moved together with the recording head. The movement amount of the recording medium is determined based on the position where the mark detecting device detects the mark.

Inkjet recording apparatus having an adjusting mechanism for adjusting moving of a recording medium

An inkjet recording apparatus having therein:

A platen on which a recording medium advances, of an inkjet recording apparatus, having:

Platen and inkjet recording apparatus having that platen

There is described an ink-jet printer, which emits ink particles onto a recording medium to prints an image on the recording medium, and in which moving velocities of the ink particles are detected to perform stable emitting actions of the ink particles. The ink-jet printer includes: an ink-jetting head having a plurality of nozzles from which the ink particles are emitted; a velocity detecting section to detect moving velocities of the ink particles by measuring detection times at each of which each of the ink particles is detected; a calculating section to calculate an average value of the detection times measured by the velocity detecting section; and a head-drive controlling section that compares the average value calculated by the calculating section with a target value established in advance, to change a driving condition for the ink-jetting head so that the average value coincides with the target value.

Ink-jet printer

A microscopic droplet detecting device for detecting a passage of droplets jetted from a nozzle of an ink jetting device, including a droplet detecting section including a paired light emitting and receiving elements, a jet control section to control the ink jetting device to jet droplets serially along the traveling course, and a jetting condition detecting section to detect a jetting condition of the nozzle based on the output signal.

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Uenohara, Japan

Hiroaki Arakawa