Abstract: A liquid discharge apparatus includes a liquid discharge head including a nozzle face in which a nozzle is formed and configured to discharge a liquid, a carriage on which the liquid discharge head is mounted, and a guide shaft configured to hold the carriage movably. The liquid discharge apparatus further includes a driver configured to move the carriage, and a coupling between the carriage and the driver. The coupling is disposed on an axis of the guide shaft in a direction orthogonal to the axis of the guide shaft.

Abstract: A printing control method, a printing control device and a storage medium are provided. The method includes steps of: acquiring first scan times of first ink used for printing a unit area; acquiring second scan times of second ink used for printing a unit area; comparing the first scan times with the second scan times; according to a comparison result, controlling a printer to eject the first ink or/and the second ink in each scan in a main scan direction. The method and device are able to efficiently and quickly print a three-dimensional effect image.

Abstract: In the technology of the present disclosure, multiple nozzles included in a printing head are stably driven while disparity in the usage frequency of each nozzle is suppressed. The dot counter scans the digital halftone data in the X direction and performs accumulation-counting on the pixel value Ixy (the number of printing dots) of each pixel for each address y with the accumulation counter CntCum(y). The signal value Gxy of the corresponding pixel address (x, y) is obtained from the division pattern memory unit. The nozzle selection unit selects the nozzle to be used for forming a printing dot, based on the counted values of the accumulation counter CntCum and the signal value Gxy of the division pattern. Then, the address n of the nozzle memory corresponding to the selected nozzle to form a printing dot is determined.

Abstract: A measuring device a measurement unit configured to measure an image on a sheet, the measurement unit including a light emitting portion configured to illuminate the sheet with light, and a detecting portion configured to detect light reflected by the sheet; a supporting unit supporting the measurement unit; and a driving unit configured to move the measurement unit supported by the supporting unit in a scanning direction. A size, in the scanning direction, of a detectable range of the detecting portion in which the detecting portion is capable of detecting the reflected light from the sheet is larger than a size, in a sub-scanning direction perpendicular to the scanning direction and a normal direction of a surface of the sheet, of the detectable range of the detecting portion.

Abstract: Mask entries for each of a plurality of passes over which print fluid drops are to be dispensed for printing an image are generated based on different types of masks and based on image data for the image. Print fluid drop dispensation for a pixel for which the mask entries for a given pass specify repeated print fluid drop dispensation is moved to a mask entry for an adjacent pass that does not specify print fluid drop dispensation for the pixel. Ejection of print fluid to print the image is caused based on the generated mask entries.

Abstract: A die for a printhead is described herein. The die includes a number of fluid feed holes disposed in a line parallel to a longitudinal axis of the die, wherein the fluid feed holes are formed through a substrate of the die. The die includes a number of fluidic actuators, proximate to the fluid feed holes, to eject fluid received from the fluid feed holes. Circuitry on the die operates the fluidic actuators, wherein traces are provided in layers between adjacent fluid feed holes, connecting circuitry on each side of the fluid feed holes.

Abstract: A printing system is disclosed.

Abstract: A printing method for performing printing while complementing black with composite black, the printing method including: printing a test pattern having a plurality of patch images for which composite mode varies, this test pattern being printed for each dot size of the black to be complemented; causing a user to select a desired patch image from among the plurality of the patch images included in the printed test pattern, the selection being made for each of the dot size of the black ink to be complemented; and performing printing while complementing the black to be complemented with the composite black generated on a basis of the composite mode corresponding to the desired patch image selected correspondingly to the dot size of the black ink to be complemented.

Abstract: A printing device that performs printing on a medium includes an inkjet head, a main scan driving unit, a sub scan driving unit, and a control unit, where the control unit sets a sub-scanning movement amount based on a basic movement amount, which is a basic movement amount set according to print conditions, and a value indicating a distance for increasing or decreasing the sub-scanning movement amount in the print conditions set at the time of inputting an input correction value. Furthermore, a storage is further provided, which stores a first correction coefficient used when the basic movement amount is within a first range, and a second correction coefficient used when the basic movement amount is within a second range smaller than the first range, and the control unit sets the sub-scanning movement amount based on the basic movement amount and the calculated correction value.

Abstract: A recording apparatus includes a liquid ejection head, a relative displacement unit configured to cause the liquid ejection head and a recording medium to relatively displace in a relative displacement direction, and a controller. The liquid ejection head has two head units each having nozzles arranged in a nozzle arrangement direction intersecting with the relative displacement direction. The two head units are arranged such that some of the nozzles of the two head units overlap with each other in the relative displacement direction. When a recording command instructing to record an image on a recording medium is an instruction to record a specific image whose length in the nozzle arrangement direction is equal to or less than an arrangement range of the nozzles of the head unit, the controller controls the two head units to cause only one of the two head units to record the specific image.

Abstract: Methods, apparatus and systems for printing an image using an array of nozzles are described. In one example aspect, a printer system includes an array of nozzles and a control device coupled to the array of nozzles. The control device is configured to determine a step size for printing a current section of an image based on a set of masks. The set of masks includes one or more masks used for printing previous sections of the image. The control device is also configured to adjust the set of masks based on a printing mode to be used for the current section of the image. The array of nozzles is configured to print the current section of the image using a combination of the adjusted set of masks.

Abstract: A recording device includes a recording head in which a plurality of nozzle rows are arranged in a predetermined direction that include a first nozzle row including a plurality of nozzles for ejecting ink having a predetermined color, and a second nozzle row including a plurality of nozzles for ejecting ink having an identical color to the predetermined color, and a control unit configured to control ejection of ink by the nozzle, wherein the control unit, when a test pattern for an inspection of a missing dot due to an ejecting defect of the nozzle is recorded on a recording medium, records a dot pattern, that is an individual element that forms the test pattern, so that ink ejected from a nozzle of the first nozzle row, and ink ejected from a nozzle of the second nozzle row overlap.

Abstract: A method for printing with an inkjet head includes: printing with an inkjet head comprising a plurality n of parallel nozzle rows, where n is at least 2; where each nozzle row comprises a plurality of nozzles, where adjacent nozzle rows of the plurality of nozzle rows are shifted with respect to each other; where a distance between two nozzle rows, seen in the printing direction, is d; and where said printing includes: moving the substrate with respect to the inkjet head in the printing direction at a printing speed v?; and firing each nozzle of the plurality of nozzles with a firing frequency f?; where the plurality of nozzle rows are fired at different instants in time, such that the distance d? between printed rows of dots printed by the two nozzle rows, seen in the printing direction, is larger or smaller than d.

Abstract: There is provided an image recording apparatus, including: a conveyer; a recording head; a carriage; a signal output circuit; and a controller. When recording is performed by a multi-pass recording mode, when the number of defective-discharge nozzles is less than a predefined value, when a discharge-defective nozzle, in which a dot recording ratio using a first mask data is equal to or more than a threshold value, is included in nozzles, and when a discharge-defective nozzle, in which a dot recording ratio using a second mask data is equal to or more than the threshold value, is not included in the nozzles, the controller sets the second mask data as a used mask data and performs recording without a suction purge. In other cases, the controller sets the first mask data as the used mask data and performs a purge process before recording as needed.

Abstract: Images with high image quality having less time-difference unevenness are outputted in an inkjet printing apparatus that performs multi-pass printing using full-line inkjet print heads 2. For this purpose, a CPU is capable of setting a first printing method in which an image for a unit area is printed by a specified number of printing conveyance operations and a second printing method in which an image for a unit area is printed by a smaller number than the specified number of printing conveyance operations. The CPU sets conveyance conditions such that a taken time for one printing conveyance operation of the printing conveyance operations for a unit area in the second printing method is smaller than a taken time for one successive printing conveyance operation of the printing conveyance operations for a unit area in the first printing method.

Abstract: Provided is an inkjet recording apparatus including: a nozzle configured to eject droplets including a first droplet and a second droplet larger than the first droplet; a moving mechanism that moves a sheet relative to the nozzle; and a processor configured to generate ejection data for the droplets, the ejection data corresponding to a dot image formed by ejecting the droplets from the nozzle on the sheet moved relatively to the nozzle by the moving mechanism, wherein the processor is configured to replace the second droplet for a pixel of interest in an original ejection data for generating the ejection data with the first droplet when the droplets are not ejected for n pixels in a row after the pixel of interest to generate the ejection data, where n is an integer of 2 or more.

Abstract: Examples of the present disclosure relate to a calibration method for a printing system. The method comprises printing a diagnostic pattern representative of decap time. The diagnostic pattern comprises the firing of nozzles after an exposure to ambient air during a first predetermined time period to produce a first pattern element and the firing of nozzles after an exposure to ambient air during a second predetermined time period to produce a second pattern element. The method includes scanning the resulting diagnostic pattern with a sensor to collect decap data in a digital form, digitally analyzing the decap data, the digital analysis comprising identifying a quantitative difference between the first and second pattern elements, and modifying a servicing process of the printing system if the quantitative difference passes a predetermined threshold.

Abstract: In a method of supplying chemical liquid using an ink jet head including a central portion and peripheral portions each having a first portion and a second portion, a first chemical liquid supply of a chemical liquid may be provided from the central portion onto a substrate, a second chemical liquid supply of the chemical liquid may be provided from the first portion onto a substrate, and a third chemical liquid supply of the chemical liquid may be provided from the second portion onto a substrate. The ink jet head may be moved over the substrate by a length of the peripheral portion. The first chemical liquid supply of the chemical liquid may be provided from the central portion onto a substrate, the second chemical liquid supply of the chemical liquid may be provided from the first portion onto a substrate, and the third chemical liquid supply of the chemical liquid may be provided from the second portion onto a substrate.

Abstract: A color film substrate having a plurality of pixel areas includes a base substrate, a color resistance, a black matrix and protruding structures. The color resistance layer is arranged on the base substrate and including a plurality of color resistances arranged in an array. The black matrix is arranged between any adjacent color resistances. The protruding structure is arranged on at least a portion of the black matrix and surrounding at least one of the color resistances. Wherein a surface of the protruding structure away from the base substrate does not exceed a surface of the color resistance away from the base substrate.

Abstract: An image processing apparatus is configured to generate a plurality of pieces of partial printing data by executing a generating process including a color conversion process. A printing execution device performs N-th and (N+1)-th partial printing. An area in which the N-th partial printing is performed includes an overlap area, and first and second non-overlap areas respectively arranged on upstream and downstream sides, in the conveying direction, with respect to the overlap area. In the overlap area, dots are formed by both the N-th and (N+1)-th partial printings. The color conversion process includes a first converting process for the first non-overlap area with reference to a first profile, a second converting process for the second non-overlap area with reference to a second profile, and a third converting process for the overlap area, the third converting process being different from both the first and second converting process.

Abstract: The present disclosure relates to a robotic apparatus and methods for automatic nail polish application on natural or artificial finger or toe nails.

Abstract: A recording control device includes: a test pattern recording control unit; a correction value calculating unit that calculates a correction value of the ink amount of each nozzle, based on a reading value of the ink recording area of the recorded test pattern; and a correction recording control unit, in which the maximum ink amount of the ink recording area corresponding to the reading value used by the correction value calculating unit to calculate the correction value is smaller when a medium type of a recording medium on which the test pattern is recorded is a second recording medium in which the ink is easier to bleed than a first recording medium than when the medium type of the recording medium on which the test pattern is recorded is the first recording medium.

Abstract: A recording device includes a recording unit configured to eject a liquid onto a medium to record, a carriage including the recording unit and configured to move in an X direction corresponding to a medium width direction that intersects a Y direction corresponding to a medium transport direction, a liquid reservoir located in the carriage at a position above the recording unit, configured to contain a liquid, and having a fill port through which the liquid is supplied, a fill port unit located in the carriage at a position above the liquid reservoir and including a component for open/close operation of the fill port, and an operation unit through which the device is operated. The fill port unit and the operation unit partly overlap in a device front-rear direction that is parallel to the medium transport direction, when viewed in the X direction.

Abstract: An image reading apparatus includes a detection unit provided at a position separated from a positioning portion by a predetermined distance in a first direction, a discriminator configured to determine a length, in the first direction, of a document, and a setting unit that sets a start position to a first position if a detection position at which the detection unit detects the document is not included in a range, in a second direction, of the transparent member that is covered by the document, and sets the start position to a second position if the detection position is included in the range and the detection unit does not detect the document, wherein, in the first direction, the distance between the first position and the positioning portion is larger than the distance between the second position and the positioning portion.

Abstract: At least certain embodiments of the present disclosure include an environment with user interface software interacting with a software application to provide gesture operations for a display of a device. A method for operating through an application programming interface (API) in this environment includes transferring, from platform code configured to provide a common framework for handling gesture events, to a program, a rotation transform function call in response to an input that corresponds to a gesture based on two or more concurrent touches. The method includes transferring, via the API, a gesture change function call from the platform code to the program in response to detecting a change in the gesture that corresponds to a change in one or more touches. The method includes, in response to transferring the rotation transform function call and the gesture change function call, performing a rotation transform to rotate a view of the program.

Abstract: An image processing apparatus performs quantization processing of first multivalued image data, second multivalued image data, and third multivalued image data using a dither pattern including a plurality of threshold pixels having threshold values respectively determined for quantization, generates first recording data by quantizing the first multivalued image data using a dither pattern having a threshold pixel arrangement satisfying a predetermined condition regarding the number of threshold pixels and a predetermined condition regarding low-frequency components corresponding to a frequency region lower than a predetermined frequency in spatial frequency characteristics corresponding to an arrangement of the threshold pixels, generates second recording data by quantizing the second multivalued image data using the dither pattern having the threshold pixel arrangement, and generates third recording data by quantizing the third multivalued image data using the dither pattern having the threshold pixel arrang

Abstract: Embodiments of a method for removing a tattoo through patterned trans-epidermal pigment release includes determining first treatment area of skin of a patient through a primary template including primary apertures, marking the first treatment area of skin of the patient along borders of the primary apertures to outline a grid of primary tegulae, and delivering a tattoo removal fluid to the marked first exposed skin in a first treatment session. The method further includes determining a secondary treatment area through a secondary template including secondary apertures, marking the secondary treatment area along borders of the secondary apertures to outline a grid of secondary tegulae, and delivering a tattoo removal fluid to the secondary tegulae in a second treatment session.

Abstract: An inkjet printer includes an m number of data setters ranging from a first data setter to an m-th data setter, and an m number of print controllers ranging from a first print controller to an m-th print controller, where m is a natural number greater than or equal to 2. Upon receiving data for ink dots, an n-th data setter sets an n-th dot group including some or all of the ink dots, where n is a natural number in a range of from 2 to m. An n-th print controller causes the n-th dot group to be formed over an (n?1) dot group. The first to the m-th data setters set the first to the m-th dot groups so that at least some of ink dots belonging to the first to the m-th dot groups overlap each other.

Abstract: The present disclosure relates to methods and apparatuses including printheads arranged along a machine direction for printing regions of advancing substrate at desired contrasts, wherein apparatuses include at least one printhead configured to print a region of a nonwoven substrate. The printhead is operated at a firing frequency and the nonwoven substrate is advanced at a speed in the machine direction under the printhead. Drops of ink having a drop mass DM are ejected from the printhead onto the first surface of the nonwoven substrate to define a printed region having a print resolution extending the machine direction, MDR (dpi), and a print resolution extending in the cross direction, CDR (dpi). In turn, the printed region includes an ink basis weight, IBW (gsm), that is equal to or greater than about 0.5 grams per square meter (gsm) and an optical density that is equal to or greater than about 0.2.

Abstract: There is provided a printer including first to fourth head chips, and first and second rollers. The first to fourth head chips are arranged at intervals in a second direction orthogonal to a first direction. A nozzle, of nozzles arranged in a second head chip N and used for printing, which is positioned closest to the one side in the second direction is referred to as a nozzle A. A nozzle, of nozzles arranged in a fourth head chip N and used for printing, which is positioned closest to the one side in the second direction is referred to as a nozzle B. The nozzle A is arranged closer to the one side in the second direction than the nozzle B and the first roller is arranged closer to the other side in the second direction than the second roller.

Abstract: An image forming apparatus includes an image forming unit configured to form a predetermined pattern image on a sheet, a notifying unit configured to provide a notification of an orientation for placing the sheet on which the predetermined pattern image is formed by the image forming unit, on a placement portion, a reading unit configured to read the sheet on a line to line basis, to generate image data, and a detection unit configured to detect a streak-shaped image extending in a direction along a predetermined edge of the sheet, by analyzing the image data generated by reading the sheet by the reading unit, wherein the notifying unit provides a notification of a placement orientation for allowing the sheet, on which the predetermined pattern image is formed, to be read on a line to line basis, the line extending in a direction along the predetermined edge.

Abstract: An inkjet printing machine includes a controller and performs margin-less printing on a base material on the basis of image data having a size larger than that of the base material by discharging ink from an inkjet head while relatively moving the base material and the inkjet head for one cycle of reciprocation or more in a main-scanning direction. On the basis of the image data, the controller controls the inkjet head to stop discharging ink, when the inkjet head is moved from the outside toward an end of the base material. The controller controls, when the inkjet head is moved from the inside toward the end of the base material, the inkjet head to discharge ink to complement an image in a section where the inkjet head stops discharging ink.

Abstract: At least certain embodiments of the present disclosure include an environment with user interface software interacting with a software application to provide gesture operations for a display of a device. A method for operating through an application programming interface (API) in this environment includes transferring a scaling transform call. The gesture operations include performing a scaling transform such as a zoom in or zoom out in response to a user input having two or more input points. The gesture operations also include performing a rotation transform to rotate an image or view in response to a user input having two or more input points.

Abstract: An ink-jet recording apparatus configured to record an image based on image data on a sheet, the ink-jet recording apparatus includes a first roller pair, a second roller pair, a carriage, a recording head, and a controller configured to: control the first roller pair and the second roller pair to perform intermittent conveyance of the sheet; control the carriage and the recording head to record a one-pass image on the sheet; and calculate an overlap amount, in the conveyance direction, of a one-pass image to be recorded on the sheet in a predefined one pass and a one-pass image to be recorded on the sheet in a next one pass after the predefined one pass.

Abstract: An image inspection device analyzes data of a first read image obtained by reading a defective nozzle detection pattern which is recorded in a first region of a recording medium by a single pass ink jet printing apparatus to detect a defective nozzle of a line-type ink jet head used to record the defective nozzle detection pattern and stores a history of the detection result of the defective nozzle in a history information storage unit. The image inspection device analyzes data of a second read image of a printed image recorded in a second region of the recording medium to detect an image defect of the printed image and collates information about the detected image defect with history information stored in the history information storage unit to specify a defective nozzle causing the image defect.

Abstract: A calculating unit calculates, as a reference number N of scans, a sum by adding 1 to a product M of the number m of scans in a main-scanning direction and the number n of scans in a sub-scanning direction. An assigning unit assigns, as a count of scans indicating a scan order, an integer 1 or more and the product M or more to each pixel of a unit image. A changing unit changes the count of scans of some pixels to which a first scan is assigned to an N-th scan. The generating unit generates print data, in which nozzle groups from a nozzle group arranged on a downstream end in the sub-scanning direction to a nozzle group arranged on an upstream end are sequentially assigned to pixels from the pixels to which the first scan is assigned to the pixels to which the N-th scan is assigned.

Abstract: An apparatus includes multiple image processing units configured to execute image processing on input data, which are connected in serial, and include two or more image processing units having the same image processing function. The image processing units include a transfer unit configured to transfer input first data to a next image processing unit without changing the data, and an image processor configured to execute image processing on the first data to output second data. At least one of the image processing units transfers the first data to the next image processing unit without changing the first data when the first data is input, and also outputs the second data.

Abstract: A method for printing image data with a printing system having a staggered array of overlapping printheads. Adjacent printheads overlap in the cross-track direction defining an overlap region such that image pixels corresponding to the overlap region can be printed with either first or second printheads. The method includes defining an initial row interval N and an initial position of a transition boundary within the overlap region. N rows of image pixels are then printed wherein image pixels on one side of the transition boundary are printed using the first printhead and image pixels on the other side of the transition boundary are printed using the second printhead. A random process is used to iteratively determine updated row intervals, where the position of the transition boundary is shifted by an increment amount of between one pixel and three pixels for each row interval.

Abstract: An image forming apparatus includes an image forming unit having at least two nozzle lines each having multiple nozzles to discharge different color droplets; a carriage that carries the image forming unit and is configured to reciprocate in the moving direction crossing an arrangement direction of the nozzles; and a control device to control dual-directional printing to form an image using the at least two nozzle lines in an outward and a return of the carriage. The control device executes color difference handling print control for discharging the different color droplets by using, of each of the nozzles in the at least two nozzle lines, the nozzles located at different positions in the arrangement direction of the nozzles while not overlapping in the moving direction of the carriage.

Abstract: A data processing apparatus includes a holding unit holding a code table, in which each of the codes in the table determines the dot arrangement pattern, a determining unit determining a predetermined number of first offset values which is power of 2, the first offset values denoting a number of pixels by which an arrangement of the codes is shifted in the code table, a table generating unit, in a case where a size of the code table is not power of 2 and the determining unit determines the first offset value wherein a quotient and a remainder when the predetermined number is divided by the size is 1 or more, determining a second offset value wherein the quotient is zero, as substitute for the determined first offset value, and to generate the code table to which an offset is made with the second offset value.

Abstract: A system implementable on a computing device for handling color assignment within a complex document includes a user interface to facilitate user modification of at least one first color to at least one second color within a previously chosen color scheme for a component of the document. The color scheme has a predetermined number X of principal colors and a predetermined number Y of associated subordinate colors per principal color. The system also includes a color handler to modify the color scheme to produce an updated color scheme to match a perceived brightness of the at least one second color throughout at least a portion of the updated color scheme and a color processor to process and apply the updated color scheme at least to the component.

Abstract: An ink jet recording apparatus that executes ink jet recording based on multi-pass recording and that achieves a high glossiness and a low granularity is provided. Based on information corresponding to an ink discharge amount, distribution and concentration masks are selected for low and high duty areas of a recorded image, respectively.

Abstract: A printing control apparatus which discharges ink from nozzles, while moving a printing head that includes at least a first nozzle row in which a plurality of nozzles capable of discharging a same type of ink are arranged in a predetermined nozzle row direction and a second nozzle row in which a plurality of nozzles capable of discharging the same type of ink are arranged in the nozzle row direction, in a main scanning direction intersecting with the nozzle row direction, in which, when, out of a group of raster lines corresponds to odd-numbered positions in the nozzle row direction and a group of raster lines which corresponds to even-numbered positions in the nozzle row direction, one group of the raster lines is printed by discharging the ink from the nozzle row out of the first nozzle row and the second nozzle row, which precedes during the movement.

Abstract: A method of fabricating an organic electronic device using ink jet printing in swathes, comprises depositing an ink into a first set of locations in a column in a first print pass; wherein the first set of locations is less than a total number of locations in the column; and depositing an ink into a second set of locations in the column in a subsequent print pass; wherein the second set of locations is less than a total number of locations in the column. Preferably the number of nozzles used to fill all locations in a column is equal to the number of print passes needed to print the column. All locations in the swathe are printed after all print passes using a regular repeating randomized pattern, such that be ensured that print locations are not under filled, or over filled.

Abstract: A recording apparatus includes a first nozzle row and a second nozzle row. A part of nozzles of the first nozzle row and the second nozzle row are overlapped in a predetermined alignment direction. A defective nozzle is included in the nozzles of the first nozzle row. The recording apparatus includes a processing unit that causes the nozzle closest to the defective nozzle in one side of the opposite sides in the alignment direction to be selected as a first complementary nozzle and the closest nozzle in the other side thereof to be selected as a second complementary nozzle among the nozzles in an overlap section of the second nozzle row with the first nozzle row, and complementary dots that complement a dot which is supposed to be formed by the defective nozzle to be formed by the first complementary nozzle and the second complementary nozzle.

Abstract: An inkjet recording apparatus includes a plurality of liquid jet heads each including a plurality of nozzles, a designating unit, and a spitting control unit. The designating unit is configured to designate, among the plurality of nozzles of each of the plurality of liquid jet heads, nozzles involved in printing from data representing an image to be printed as nozzles to be fired for a spitting operation. The spitting control unit is configured to carry out control of, if the number of the nozzles designated by the designating unit exceeds a threshold, performing the spitting operation in a time-divided manner that prevents the number of nozzles fired at a same time for the spitting operation from exceeding the threshold.

Abstract: In order to control smoothness depending on accumulation of a pigment ink in the multi-pass printing, an information processing apparatus for an image forming apparatus that forms an image on the same area in a print medium by a plurality of printing scans with the same pigment ink, the information processing apparatus comprises an input unit that receives inputs of image data and a target gloss level; a storage unit that stores a plurality of pattern sets including a recording pattern for each of the printing scans; and a generation unit that generates pattern data corresponding to the recording patterns by selectively using the pattern sets based on the image data and the target gloss level; wherein at least one of the plurality of pattern sets has a different thinning ratio in the recording pattern for each of the printing scans on the same area.

Abstract: A method for printing an authentication pattern wherein, using a multi-deflection continuous inkjet printer, the pattern is printed on a substrate and only contains a small number of black pixels per raster. The resolution in the travel direction X of the substrate and in direction Y of the rasters is thereby largely improved compared with printing in dot-matrix mode, which makes reproduction of the pattern difficult for an infringer not having means to determine the electric charge to be applied to each of the droplets of a train of droplets needed to print each raster of the pattern.

Abstract: This invention concerns vision control panels and a method of UV inkjet printing vision control panels. A substantially imperforate light permeable material is partially printed with a ‘print pattern’ comprising a base layer and a design layer comprising a design colour layer. The method is limited to digital UV inkjet printing of all the superimposed layers required to make such panels. Optionally, the method uses a novel printhead array with a novel order of ink color supply and/or novel software to enable the required build-up of ink layers, for example of black, optional silver, white, cyan, magenta, yellow and process black colors. Printing is preferably arranged so that the base layer and design color layer are printed in the minimum number of passes of the printhead assembly of the digital UV inkjet printer to achieve the desired effect, preferably in one pass of the printhead assembly.

Abstract: An inkjet printer, including an inkjet head, a conveyer unit to convey a recording medium in a conveying direction, a position detecting unit to detect a position of the recording medium along the conveying direction, a wave shape generating mechanism to deform the recording medium into a predetermined wave shape along a direction orthogonal to the conveying direction, a gap information storing device to store gap information related to a gap between an ink discharging surface of the inkjet head and the recording medium, and a correcting device to correct the gap information according to a position of the recording medium along the conveying direction, is provided.