Abstract: There is provided a printer including an imaging device that captures an image of a medium, and a control unit that controls an ink discharge amount of a printing unit that discharges ink to form an image. The control unit acquires a captured image of a test pattern which is obtained by an imaging device and is printed by the printing unit, and controls an ink discharge amount on the basis of a grayscale value of a first region including an outer peripheral edge of the test pattern and a grayscale value of a second region within the test pattern.

Abstract: A magnetic field sensor apparatus for determining two or three components of a magnetic field includes at least one Wheatstone bridge with two half-bridges, wherein each half-bridge includes at least two bridge resistors, and at least one of the two bridge resistors is a magnetic-field-sensitive resistor with respect to a magnetic field component in an X/Y magnetic field sensor plane. Arranged symmetrically between the two magnetic-field-sensitive bridge resistors is a ferromagnetic flux concentration element which generates magnetic field components which are anti-symmetric with respect to a Z magnetic field component oriented perpendicular to the X/Y magnetic field sensor plane and are in the X/Y magnetic field sensor plane. A coordinate aspect proposes a method for determining a two-dimensional or three-dimensional orientation of an external magnetic field by such a magnetic field sensor apparatus.

Abstract: In one example, a printhead die includes a structure having a thickness 100 ?m or less and a ratio of length to width of at least 50 and containing, within its thickness, multiple fluid ejectors and multiple fluid chambers each near an ejector and each having an inlet through which printing fluid may enter the chamber and an outlet through which printing fluid may be ejected from the chamber.

Abstract: An imaging device and associated circuit assembly for depositing ink onto moving media. The imaging device is flexible in that it allows the configuration of pens in a variety of ways to enable a user to increase the speed with which printing can be accomplished, vary the colors used in printing, change the orientation of the printing on the media, and/or print at multiple locations at the same time.

Abstract: A method for controlling an inkjet printing apparatus performing printing to an elongated printing medium 11, the method having a discharging step of performing continuous application to a piezoelectric element 23 of a nozzle to be used with a pulse number of two or more waves per one printing element to deform the piezoelectric element and thereby discharge ink in an ink chamber 22 from an opening portion 21, and a vibrating step of performing application of the piezoelectric elements 23 to all the nozzles with a pulse number of one wave per one printing element to deform the piezoelectric elements, thereby imparting only vibrations to the inks in the ink chambers 22 without discharging the inks, where the discharging step and the vibrating step are performed alternately.

Abstract: A head includes a channel formation substrate having two piezoelectric actuator rows formed thereon, a driving circuit, and a driving circuit board which is provided with a first bump and a second bump, in which the first bump is provided on the outside of the piezoelectric actuator row, an adhesive layer is provided on both sides of the first bump and the second bump, a first through hole and a second through hole are provided on the driving circuit board, a first connection wiring and a second connection wiring are provided in the first through hole and the second through hole, and a first electrode of the piezoelectric actuator is electrically connected to a first connection wiring via the first bump and a second electrode is electrically connected to a second connection wiring via the second bump.

Abstract: A semiconductor device for a liquid discharge head is provided. The device includes first transistors configured to receive a first voltage at a first terminal and second transistors configured to receive a second voltage at a first terminal. The device further includes discharge elements configured to discharge a liquid. Each discharge element is connected between a second terminal of a first transistor and a second terminal of a second transistor. A first control circuit is configured to supply a first control signal for controlling a conductive state of the first transistors via a common signal. A stabilization circuit is configured to stabilize a voltage of at least one of the second terminal of the first transistor or the control terminal of the first transistor.

Abstract: A liquid ejection control apparatus, which controls a drive voltage waveform applied to a piezoelectric element so as to control ejection of a pulsed liquid jet, includes a first operation unit that receives input of an index value for setting a position of an inflection point in a rising portion of the drive voltage waveform, and a control unit that sets the position of the inflection point in the rising portion of the drive voltage waveform according to the index value so as to control changing of the drive voltage waveform.

Abstract: A liquid discharge head includes a nozzle row, individual liquid chambers, a common liquid chamber, a circulation liquid chamber, a supply port, and a delivery port. The nozzle row includes nozzles to discharge liquid. The nozzles are arrayed in a nozzle array direction. The individual liquid chambers are communicated with the nozzles and arrayed in the nozzle array direction. The common liquid chamber extends longer in the nozzle array direction, to supply liquid to the individual liquid chambers. The circulation liquid chamber is communicated with the individual liquid chambers. The supply port is disposed at a center of the common liquid chamber in the nozzle array direction, to supply liquid to the common liquid chamber. The delivery port is disposed outside the common liquid chamber in the nozzle array direction, to deliver liquid from the circulation liquid chamber.

Abstract: A plurality of recording elements included in a printed head are grouped into a plurality of groups, a test order is set in units of groups, and a test of the recording elements is periodically performed in units of groups in the set test order. In a case where an abnormality is detected in the recording element as a result of the test, the recording element in which an abnormality is detected is recognized as a retest target, an order of tests is changed through interruption, and a retest of a group including the recording element recognized as a retest target is performed. In a case where an abnormality is detected again in the recording element that is a retest target as a result of the retest, the recording element that is a retest target is recognized as an abnormal recording element.

Abstract: An ink jet printer that performs printing on the three-dimensional object using an ink jet scheme is provided, the printer includes an ink jet head, and a print object retaining section, the print object retaining section includes a first shaft, a second shaft, a third shaft, and a rotation driving section, a distance between the first shaft and the second shaft is larger than a distance between the first shaft and the third shaft, and in a case of performing printing on a three-dimensional object having a cylindrically shaped portion, the print object retaining section retains the three-dimensional object by mounting the cylindrically shaped portion on the first shaft and the second shaft, or on the first shaft and the third shaft, and the rotation driving section causes the three-dimensional object to rotate by causing at least the first shaft to rotate.

Abstract: A radiation curable type ink jet ink set contains a magenta ink which contains C. I. Pigment Red 57:1 in an amount of 2.0% by mass to 4.0% by mass and a yellow ink which contains C. I. Pigment Yellow 185 in an amount of 1.5% by mass to 4.0% by mass. An ink jet recording method includes a jetting step of jetting the yellow ink and/or the magenta ink contained in the radiation curable type ink jet ink set onto a substrate from an ink jet recording head, and a curing step of curing the magenta ink and/or the yellow ink by radiation irradiation.

Abstract: There is provided a droplet drying device including: a light source that irradiates, with light, and dries a droplet ejected to a recording medium by a forming unit that ejects the droplet to form an image; a reading unit that reads a specifying image in which a light emitting condition of the light source is specified and which is formed by the forming unit in a region out of an image forming region on the recording medium; and a light source controller that controls the light source such that the light source emits light in accordance with the light emitting condition specified in the specifying image read by the reading unit so as to irradiate the droplet with the light.

Abstract: A post-processing liquid application device includes an ejecting head that ejects a post-processing liquid in a specific ejection pattern on a recording medium after ink has been attached thereto to form a character and/or an image based on image information, and a control unit that selects the specific ejection pattern based on a coverage rate calculated from the image information. When the coverage rate is low, the control unit selects a first ejection pattern for ejecting the post-processing liquid on a printed portion of a print region of the recording medium or ejecting the post-processing liquid on the printed portion and a surrounding portion thereof. When the coverage rate is high, the control unit selects a second ejection pattern for ejecting the post-processing liquid over the entire surface of the print region of the recording medium.

Abstract: A thermal printer includes: a plurality of heat elements that are to be heated by applying an electrical power; a printing controller that applies a first electrical power to heat elements not to be used for printing, the first electrical power depending on the number of heat elements not to be used for printing among the plurality of heat elements; and a thermal head that prints using the plurality of heat elements.

Abstract: A liquid ejecting apparatus which includes a modulation circuit which generates a modulated signal obtained by performing pulse modulation with respect to a source signal as a source of a driving signal; a boosting circuit which outputs a voltage boosted by at least a first capacitor; a pair of transistors which generates an amplified-modulated signal based on the modulated signal; a low pass filter which generates a driving signal by smoothing the amplified-modulated signal; a voltage generating circuit which outputs an offset voltage from an output terminal; and a second capacitor which is electrically connected to the output terminal, in which at least the boosting circuit and the voltage generating circuit are integrated in an integrated circuit, and a distance between the first capacitor and the integrated circuit is shorter than a distance between the second capacitor and the integrated circuit.

Abstract: A liquid ejection control apparatus, which controls a drive voltage waveform applied to a piezoelectric element so as to control ejection of a pulsed liquid jet, includes a first operation unit that receives input of an index value for setting a flow velocity peak timing of a main jet of the pulsed liquid jet, and a control unit that sets a rising portion of the drive voltage waveform according to the index value so as to control changing of the drive voltage waveform.

Abstract: A liquid droplet ejecting device is provided that includes a liquid droplet ejecting head having a nozzle, a pressure chamber that accommodates liquid and is in communication with the nozzle, and a piezoelectric element that is arranged to face the pressure chamber; a drive waveform generation unit configured to generate a drive waveform that drives the piezoelectric element and has a potential that varies with respect to a reference potential; a detection unit configured to detect a relationship between a detected potential of a residual oscillation waveform that is generated within the pressure chamber after driving the piezoelectric element and a first threshold corresponding to a potential higher than the reference potential; and a state determination unit configured to determine whether the nozzle and/or the pressure chamber is in an abnormal state based on the detected relationship between the detected potential and the first threshold.

Abstract: In a liquid ejection control apparatus, an operation unit includes an energy dial used to input an energy indication value related to kinetic energy of a pulsed liquid jet ejected from a liquid ejection device, and a repetition frequency dial used to input a repetition frequency indication value related to the number of times of ejection per unit time of the pulsed liquid jet. A control unit includes a rising waveform shape setting section which sets a rising waveform shape of a drive voltage waveform so that the kinetic energy has the energy indication value on the basis of voltage amplitude of the drive voltage waveform and the repetition frequency indication value. The repetition frequency dial may be omitted, and a repetition frequency may be fixed to a predetermined value.

Abstract: An arc fault detection system includes a first current sensor, a second current sensor, a band-pass filter, and a comparator module. The first current sensor, the second current sensor, and the comparator module are each connected to the comparator module by direct leads for biasing a current differential between the first current sensor and the second current sensor using a bias calculated from a frequency component indicative of arc events received from the frequency selector.