A method for correcting an image includes: moving first and second ink jet heads and a medium relative to each other, each of the first and second ink jet heads including nozzles and drive elements corresponding to the nozzles respectively; discharging ink droplets from the nozzles of the first and second ink jet heads, by connecting each of the drive elements to one of power supply circuits and by applying voltage to each of the drive elements, the power supply circuits having different output voltage values each other; determining a density difference between a first image region and a second image region; and switching the voltage to be applied to first drive elements to a first voltage by switching the power supply circuits to be connected to the first drive elements based on the density difference.

In at least one embodiment, a number of nozzle rows in a first area on a side of one end of a first substrate closest to one end of a print head is set to be lower than a number of nozzle rows on a central side of the print head relative to the first area, and energy for driving the element on the first substrate is set to be larger than energy for driving the element on a second substrate on the central side of the print head relative to the first substrate to set a dot to be formed on the recording medium by ink discharged from a nozzle in the first area to be larger than a dot to be formed on the recording medium by ink discharged from a nozzle in the second substrate.

Disclosed is a droplet processing device which improves an operation of generating a droplet image during the conventional operation of generating a droplet image for forming a thin film on a substrate, thereby significantly reducing the generation time of the droplet image.

The droplet processing device includes: an inkjet system for receiving input of a droplet image and applying ink to cause the droplet image to be printed on a substrate; and a droplet image generating terminal for transmitting the droplet image to the inkjet system, in which the droplet image is generated by collecting a plurality of cell print data printed on the substrate and peripheral print data printed on a periphery of the cell into single polygonal information, and rasterising and halftoning the collected polygonal information.

White-balance is improved when printing on colored media, while minimizing the time and use of costly materials required by present approaches. In an embodiment, the typical solid white fill or background layer is altered by including in the white layer one or more of the other colors already available in the printer to shade this layer. Thus, a small amount of cyan, for example, helps balance a pink-ish (red) media; yellow is used for blue media; and magenta is used for green media; as well as combinations thereof. A combination of transparent process inks and opaque white helps to maintain brightness (luminosity).

After dot image data is created via a halftone process, dot size determination is performed in step S110, it is determined there is a smaller dot in front motion in step S112, and, when the smaller dot is to be allocated to a front nozzle line, a moving process is performed thereon in step S116. Once moved by one dot, the dot position of a smaller dot is allocated to a rear nozzle line and thus discharged from the rear nozzle line that is less affected by an air flow.

The printing apparatus includes a printing head that includes a plurality of nozzles including a first nozzle, a discharging controller that is capable of controlling discharging of liquid from the plurality of nozzles, a transportation section that relatively moves a recording medium and the printing head by transporting at least either or both of the recording medium and the printing head, and a suction section that includes a suction port which is positioned at an upstream side or a downstream side of the printing head in a relative moving direction of the printing head and the recording medium. The discharging controller controls the first nozzle to discharge mist type ink droplets at a timing of not discharging ink droplets for forming image from the first nozzle, and the suction section suctions the mist type ink droplets discharged from the first nozzle through the suction port.

The present disclosure is drawn to printing systems. In one example, a printing system can include a pretreatment head, an inkjet print head, and a post-treatment head. The pretreatment head can include a first plasma generator to apply a plasma treatment to a media substrate. The inkjet print head can be positioned with respect to the pretreatment head to form a printed image on the media substrate after the plasma treatment. The post-treatment head can include a second plasma generator positioned with respect to the inkjet print head to treat the printed image on the media substrate.

A liquid discharge apparatus includes a discharge device, a driving device, processing circuitry, and a reading device. The discharge device discharges liquid to a recording medium to form a test pattern. The driving device causes the discharge device to discharge the liquid according to a driving waveform. The processing circuitry inputs a plurality of driving waveforms and acquires first data indicating a standard pattern that corresponds to the driving waveform and is formed with the driving waveform or indicating a parameter of the standard pattern. The reading device reads the test pattern to generate second data. The processing circuitry compares the second data with the first data and selects a driving waveform generating a smallest difference between the second data and the first data, based on a result of comparison of the second data with the first data.

Method and apparatus (1) for finishing (2) a workpiece preferably consisting at least in parts of wood, wood materials, plastic or the like, comprising a machining unit (10) for machining the workpiece (2), in particular for shaping and/or coating the workpiece; a patterning unit (20) for patterning, in particular printing on, a surface (2) of the workpiece; and a conveying unit (30) for inducing a relative movement between the workpiece and the machining unit (10) as well as the patterning unit (20), characterized in that a control unit (40) is provided, which is connected to the machining unit (10), the conveying unit (30) and the patterning unit (20) and is configured to control the machining unit (10), the conveying unit (30) and the patterning unit (20).

An inkjet recording apparatus and an inkjet recording method which enable changing a droplet amount without changing a droplet speed of an ink discharged from the same nozzle, and including an inkjet head which expands and contracts a capacity of a pressure chamber by applying a driving signal to an actuator and a driving circuit which applies the driving signal to the actuator, the driving signal including a first expansion pulse which starts from a reference potential and expands the capacity of the pressure chamber, a first contraction pulse which contracts the capacity of the pressure chamber to discharge the ink from the nozzle, a second expansion pulse which expands the capacity of the pressure chamber, and a second contraction pulse which contracts the capacity of the pressure chamber and returns to the reference potential in the mentioned order, the driving circuit being configured to enable discharging different droplet amounts of the ink from the same nozzle by changing a potential difference between a start edge and an end edge of the first contraction pulse.