An ink jet printing apparatus includes: a conveying mechanism that moves at least one of a print medium and an ink jet head in a predetermined conveyance direction; a height information detecting unit that obtains information related to the height of the surface of the print medium; a moving mechanism that moves at least one of the ink jet head and the print medium upward and downward in the vertical direction; and a control unit that controls the ink jet head while sequentially controlling the moving mechanism accompanying conveyance by the conveying mechanism, based on the information related to the height which is detected by the height information detecting unit, thereby maintaining the distance between the print medium and the ink jet head to be within a range which is set in advance, to perform a printing process on the print medium.

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).

There is provided a printing apparatus including: a conveyer; a platen configured to support the a medium; a head; a carriage; a sensor configured to detect the medium supported by the platen; a liquid receiver; and a controller. The controller is configured to execute flushing, in which liquid is discharged from nozzles to the liquid receiver, after executing printing in a certain printing pass, which is executed before a last printing pass for printing on a certain medium and during which the carriage moves in a first direction. The controller is configured not to execute the flushing at timing between the last printing pass for the printing on the certain medium and a first printing pass for printing on the next medium.

An imaging apparatus includes a print engine having a printhead that generates ink drops, and a printhead carrier that carries the printhead in a first direction and in a second direction opposite the first direction. A controller determines an initial print direction based on ink drop information obtained by printing patches in the first direction and in the second direction, wherein the ink drop information includes a respective chromatic value of each of the patches. The controller is operatively coupled to the print engine to print an image based on the initial print direction.

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).

A print control device comprises a linear modular component, a driving mechanism, and at least one guide rail. The guide rail and the linear modular component are arranged in parallel, and the driving mechanism is disposed on one end of the linear modular component. A group of sensors are respectively disposed at two ends of the linear modular component. The driving mechanism is configured to: control a print device disposed on the linear modular component to move along the guide rail in a predefined direction. The group of sensors are configured to: detect a position relationship between the print device and the sensor. If the print device arrives at the position of the sensor located in the predefined movement direction, the sensor located in the predefined movement direction stops sending the sensing signal to the driving mechanism, such that the driving mechanism controls the print device to stop movement.

In an embodiment of the present invention, even though there is a print shift due to a gap between a nozzle in an upstream side and a nozzle in a downstream side of a printhead, a printing apparatus capable of precisely adjusting a slant of a printhead with respect to a conveyance direction in a nozzle surface of the printhead is provided. According to the embodiment, two adjustment patterns are printed at two different carriage speeds, respectively, and a print shift due to a slant of the nozzle surface of the printhead with respect to a conveyance direction of a print medium is adjusted based on these two print results.

In order to prevent streaks during the ink-jet paint coating of substrates, the invention provides a method for printing sheet-type substrates, in which a substrate (3) is moved in a feed direction (4) past an application device (7) by means of a conveying device (5) and during the movement of the substrate the application device (7) applies a fluid application material (9) drop by drop to the surface (30) of the substrate (3) in a pattern (14) with a pre-defined contour (15), in particular leaving out regions (16), through a plurality of ink-jet nozzles (70) arranged in a row transversely to the feed direction, in response to computer-controlled switching signals, wherein during the application of the pattern (14) and during the movement of the substrate (3) the ink-jet nozzles (70) are moved back and forth transversely to the feed direction (4), preferably in the longitudinal direction of the arranged row of ink-jet nozzles (70), such that the paths (72) traveled by the nozzles (70) over the substrate by the overlap of the movement back and forth with the movement in the feed direction (4) have direction components running perpendicular to the feed direction (4).

A printing apparatus prints an image by applying ink to a print surface of an inclined print medium using a print head. A control apparatus for the printing apparatus acquires information on an inclination of the print surface. Based on the information, printing is controlled according to a print condition corresponding to a magnitude of the inclination of the print surface.

The present invention provides an inkjet printing method, wherein includes the print heads' left and right scan movement along the scanning direction (X direction), the print heads' step movement along the step direction (Y direction), and the print heads' vertical movement perpendicular to the platen on which the to-be-printed object is placed (Z direction). The print heads jet ink during scanning movement for Bidirectional printing or Unidirectional printing. The print heads do not jet ink during step movement or vertical movement. The characteristic is, the step distance SH of the print heads in the step movement is a tiny step SH distance, which satisfies SH(HHH)/Steps (the calculation of HHH divided by the number of steps, the unit can be millimeter), wherein HH represents the total print swath height of one or more print heads(stitched), H represents the height of the to-be-printed image area, and Steps represents step times. This method realizes printing of high-resolution image pattern using the print heads of relatively low-resolution. It enables to reduce the total step times of the print heads and improves the utilization ratio of head nozzles. Thus, on the premise of guaranteeing the high-resolution, the print time is shortened and the printing efficiency is improved.