Abstract: A liquid droplet drying device includes: a drying unit that includes a plurality of light sources emitting light to a liquid droplet ejected to a recording medium by a forming unit which ejects the liquid droplet to form an image and drying the image and in which an amount of light of each of the plurality of light sources is variable; and a correction unit that corrects the amount of light of each of the plurality of light sources so that a light amount distribution of the drying unit is within a range of a pre-decided target using light amount information obtained by reading the amount of light emitted from each of the plurality of light sources by a reading unit which reads the image formed on the recording medium by the forming unit.

Abstract: A light emitting elements drive control device includes: a supplying unit that supplies a common power source voltage to a plurality of light emitting elements whose light emission quantities are controlled individually by current controls; a determining unit that determines voltage ranges capable of assuring proper current control operations on the individual light emitting elements based on drive voltages for the respective light emitting elements that vary as the current controls are performed; and a setting unit that sets the power source voltage to be supplied from the supplying unit from a common voltage range of the voltage ranges determined by the determining unit.

Abstract: A light emitting elements drive control device includes: a supplying unit that supplies a common power source voltage to a plurality of light emitting elements whose light emission quantities are controlled individually by current controls; a determining unit that determines voltage ranges capable of assuring proper current control operations on the individual light emitting elements based on drive voltages for the respective light emitting elements that vary as the current controls are performed; and a setting unit that sets the power source voltage to be supplied from the supplying unit from a common voltage range of the voltage ranges determined by the determining unit.

Abstract: A light emitting elements drive control device includes: a detection unit that detects drive voltages and drive currents of a plurality of respective semiconductor light emitting elements arranged in a width direction of a recording medium; a calculation unit that calculates generated heat amounts of the respective semiconductor light emitting elements from heating-raised temperatures of the respective semiconductor light emitting elements determined based on the drive voltages and the drive currents detected by the detection unit, and calculates actual emission light quantities of the semiconductor light emitting elements from differences between the generated heat amounts of the semiconductor light emitting elements and input heat amounts corresponding to powers supplied to the semiconductor light emitting elements, respectively; and a correction unit that corrects differences between the actual emission light quantities of the semiconductor light emitting elements calculated by the calculation unit and req

Abstract: A drying device includes: a drying unit that includes a laser light source group in which a plurality of laser light sources are arranged two-dimensionally and that dries ink placed on a recording medium as a result of ejecting of ink droplets from an ejecting unit by irradiating the ink with laser light; a control unit that divides the laser light source group into unit-of-control laser light source groups that are arranged in a crossing direction that crosses a feeding direction of the recording medium and each of which has, as a unit of control, a plurality of laser light sources arranged in the feeding direction of the recording medium, and controls the drying unit using laser light irradiation profiles that are set for the respective unit-of-control laser light source groups; and a setting unit as defined herein.

Abstract: A light emitting elements drive control device includes: a detection unit that detects drive voltages and drive currents of a plurality of respective semiconductor light emitting elements arranged in a width direction of a recording medium; a calculation unit that calculates generated heat amounts of the respective semiconductor light emitting elements from heating-raised temperatures of the respective semiconductor light emitting elements determined based on the drive voltages and the drive currents detected by the detection unit, and calculates actual emission light quantities of the semiconductor light emitting elements from differences between the generated heat amounts of the semiconductor light emitting elements and input heat amounts corresponding to powers supplied to the semiconductor light emitting elements, respectively; and a correction unit that corrects differences between the actual emission light quantities of the semiconductor light emitting elements calculated by the calculation unit and req

Abstract: A light emitting elements drive control device includes: a supplying unit that supplies a common power source voltage to a plurality of light emitting elements whose light emission quantities are controlled individually by current controls; a determining unit that determines voltage ranges capable of assuring proper current control operations on the individual light emitting elements based on drive voltages for the respective light emitting elements that vary as the current controls are performed; and a setting unit that sets the power source voltage to be supplied from the supplying unit from a common voltage range of the voltage ranges determined by the determining unit.

Abstract: A drying device includes: a drying unit that includes a laser light source group in which a plurality of laser light sources are arranged two-dimensionally and that dries ink placed on a recording medium as a result of ejecting of ink droplets from an ejecting unit by irradiating the ink with laser light; a control unit that divides the laser light source group into unit-of-control laser light source groups that are arranged in a crossing direction that crosses a feeding direction of the recording medium and each of which has, as a unit of control, a plurality of laser light sources arranged in the feeding direction of the recording medium, and controls the drying unit using laser light irradiation profiles that are set for the respective unit-of-control laser light source groups; and a setting unit as defined herein.

Abstract: A drying device includes: an irradiation unit that irradiates, with laser light, a printing medium onto which ink droplets have been ejected from a droplets ejecting unit; and a control unit that controls the irradiation unit so that a temperature of ink on the printing medium becomes an ink target temperature that is determined using a thermal deformation temperature of the printing medium as a reference in case the thermal deformation temperature of the printing medium is lower than or equal to an ink drying temperature, and becomes an ink target temperature that is determined using the ink drying temperature as a reference in case the thermal deformation temperature of the printing medium is higher than the ink drying temperature.

Abstract: There is provided a drying device including a plurality of surface-emitting laser elements each having a plurality of laser elements and arranged along a feeding direction of a recording medium. First power supplying pads are respectively provided at both ends of an electrode on a laser illumination surface of each surface-emitting laser element in a width direction of the recording medium and a second power supplying pad is provided at one end of the electrode on a backside of each surface-emitting laser element in the feeding direction. The respective first power supplying pads of the surface-emitting laser element arranged at an upstream-side in the feeding direction and the second power supplying pad of the surface-emitting laser element arranged at a downstream-side in the feeding direction are connected to each other by wires.

Abstract: A drying device includes a laser element that irradiates an irradiation region with a laser, the irradiation region including a plurality of droplets on a recording medium which are ejected by an ejection unit, ejecting droplets according to an image, along a transport direction of the recording medium and a direction crossing the transport direction.

Abstract: There is provided a drying device including a plurality of surface-emitting laser elements each having a plurality of laser elements and arranged along a feeding direction of a recording medium. First power supplying pads are respectively provided at both ends of an electrode on a laser illumination surface of each surface-emitting laser element in a width direction of the recording medium and a second power supplying pad is provided at one end of the electrode on a backside of each surface-emitting laser element in the feeding direction. The respective lust power supplying pads of the surface-emitting laser element arranged at an upstream-side in the feeding direction and the second power supplying pad of the surface-emitting laser element arranged at a downstream-side in the feeding direction are connected to each other by wires.

Abstract: A drying device includes: a drying unit in which a plurality of laser light sources are arranged two-dimensionally and that dries ink placed on a recording medium by ejecting ink droplets from an ejecting unit by irradiating the ink with laser light; a measuring unit that measures a temperature characteristic, in a conveying direction of the recording medium, of the ink placed on the recording medium; a generation unit that generates, based on the temperature characteristic, a laser light irradiation profile with which the ink temperature will be raised by irradiation with laser light to become higher than or equal to a flex temperature at which the ink temperature starts to flex and then kept in a range being higher than or equal to the flex temperature and lower than a boiling temperature or the ink; and a control unit that controls the drying unit using the irradiation profile.

Abstract: A drying device includes a laser element that irradiates an irradiation region with a laser, the irradiation region including a plurality of droplets on a recording medium which are ejected by an ejection unit, ejecting droplets according to an image, along a transport direction of the recording medium and a direction crossing the transport direction.

Abstract: A droplets drying device includes: an illuminating unit that applies infrared laser light to droplets that have been ejected onto a recording medium by an ejecting unit that ejects droplets in accordance with an image to be formed; and a control unit that controls at least one of timing, a position or positions, and an amount or amounts of application of infrared laser light to the droplets by the illuminating unit in accordance with an attribute that influences image quality of an image formed.

Abstract: A droplets drying device includes: an illuminating unit that applies infrared laser light to droplets that have been ejected onto a recording medium by an ejecting unit that ejects droplets in accordance with an image to be formed; and a control unit that controls at least one of timing, a position or positions, and an amount or amounts of application of infrared laser light to the droplets by the illuminating unit in accordance with an attribute that influences image quality of an image formed.

Abstract: A liquid supplying apparatus includes: a first flow channel configured to be switchable between a state of communication with a liquid supply object and a state of noncommunication with the liquid supply object; a first pressure applying device which applies pressure to liquid in the first flow channel; a first pressure absorbing device which absorbs a pressure fluctuation of the liquid in the first flow channel; a first measuring device which measures a pressure increase value in the first flow channel when the first pressure applying device is operated under a standard operating condition in which pressure in the first flow channel varies relatively moderately in proportion to a liquid feed amount to the first flow channel in the state of noncommunication where the liquid supply object and the first flow channel are not communicated with each other; a comparing device which compares the pressure increase value measured by the first measuring device with a predetermined pressure increase target value; and a

Abstract: A liquid supply controller includes a liquid circulation controller that includes supply and recovery units of a liquid droplet discharge unit, and that circulates liquid according to a differential pressure between the supply unit and the recovery unit, a back pressure setting unit that sets a back pressure that is a discharge pressure based on supply and recovery pressures set by the liquid circulation controller, a circulation amount obtaining unit that obtains a flow rate of the liquid circulated; a judging unit that judges whether or not the obtained flow rate is a proper value, and a differential pressure adjusting unit that adjusts the differential pressure while maintaining the back pressure within an allowable range when it is judged that the flow rate is not the proper value.

Abstract: An abnormality judgment apparatus of a liquid supply system which supplies liquid from a liquid tank to a liquid ejection head via a liquid flow channel, includes: a pressure change application device which applies a pressure change to the liquid flow channel; first and second pressure measurement devices which measure a pressure in the liquid flow channel; and an abnormality judgment device which performs abnormality judgment and identification of an abnormal location in the liquid supply system, according to measurement values measured by the first and second pressure measurement devices before and after the pressure change is applied by the pressure change application device.

Abstract: A liquid supply mechanism includes: a supply pathway that supplies liquid to a plurality of ejection sections each ejecting the liquid from nozzles; a branching path that is branched off from the supply pathway and through which the liquid circulates; a buffer unit that is disposed in the branching path and that lessens pressure fluctuations occurred in the liquid in the branching path; and a changing unit that changes a pathway to the buffer unit so that the changing unit shuts the pathway to the buffer unit during maintenance for discharging the liquid from the nozzles of the ejection sections. The liquid discharged during the maintenance is greater in quantity than the liquid discharged during normal operation.