A drive circuit of a liquid ejecting device includes a first switch, a second switch, and a signal processing circuit. The first switch is connected between a first potential and an output terminal through which a drive signal is transmitted to an actuator of a liquid ejecting device. The second switch is connected between the output terminal and a second potential lower than the first potential. The signal processing circuit is configured to detect a difference between a waveform of a target drive signal and the drive signal waveform output at the output terminal, and to cause the first switch and the second switch to be off when an absolute value of the difference is less than a threshold value.

Printing techniques for print media are described herein. In an example, a printer includes print head and a feed roller to move a medium under the print head along a print path. The print head includes a first set of nozzles such that the first set of nozzles is proximal to the feed roller. Further, the print head is to print on a Top-of-Form (TOF) of the medium through the first set of nozzles.

A liquid ejecting head includes a driving substrate including a driving element configured to, in response to a signal from an external controller, expand or contract so that a liquid is discharged from a pressure chamber through a nozzle, and a connection portion connecting the driving element to a wiring substrate connectable to the external controller; a sealing member that covers the connection portion and a part of the wiring substrate; and a mask plate partially covering a part of the driving substrate including the connection portion and contacting the sealing member.

According to one embodiment, a liquid discharging device includes a storage unit storing a use history indicating whether the liquid discharging device has been previously used, and a discharging device mounted on a liquid dispensing apparatus and configured to discharge a liquid when supplied a discharge voltage in response to a discharge signal received from the liquid dispensing apparatus.

Liquid discharge head comprising: liquid discharge unit, which includes discharge port, liquid retaining section configured to retain liquid to be discharged from the discharge port, and displacement section configured to discharge the liquid retained within the liquid retaining section from the discharge port; a pair of liquid storage sections, which are configured to store the liquid and are each connected to the liquid retaining section in the liquid discharge unit so that the liquid can flow; a pair of liquid feeding sections that are connected to the pair of liquid storage sections and are configured to feed the liquid between the liquid storage section and the liquid retaining section; and a pair of open and close sections that are each disposed at flow path between the liquid feeding section and the liquid storage section and are configured to open and close the flow path.

An image forming apparatus includes: a nozzle head in which nozzles that form dots on a recording medium by ejecting ink onto the recording medium are arranged in a row in a first direction; a moving mechanism that moves at least one of the recording medium or the nozzle head relative to another in a second direction intersecting the first direction; an image acquirer that acquires image data for forming an image of dots on the recording medium; and a halftone processor that determines whether to form a dot at each pixel position of the image on the basis of the image data, wherein the halftone processor includes: an n-value processor; a grouping processor; a total value calculator; and a rearrangement processor.

A droplet discharge head each includes a first liquid chamber formed on a flow path forming substrate, a nozzle communicating with the first liquid chamber, and a first inflow path for supplying a liquid to the first liquid chamber, and a first actuator that individually changes a pressure in the first liquid chamber, a second actuator that changes pressures in a plurality of first liquid chambers in common, in which an amount of expansion/contraction of the second actuator is larger than that of the first actuator.

A droplet dispensing apparatus includes a droplet ejection device, a microplate holder, a sheet stand, an image capturing device and a controller. The image capturing device is configured to move to a position above the sheet stand. The controller is configured to perform image processing on image data generated from an image captured by the image capturing device when the image capturing device is at the position above the test sheet on the sheet stand, to determine a size of each of test patterns formed by droplets dropped on the test sheet from the array of nozzles. The controller is further configured to generate a data file including the determined size of each of the test patterns. The test sheet colors or discolors at a place receiving a light-transmissive droplet.

A liquid discharge head includes a drive base, a flexible wiring substrate, and a mask plate. The drive base includes an array of nozzles on a surface of the drive base, a plurality of actuators corresponding to the array of nozzles, and a plurality of electrodes on the surface of the drive base and electrically connected to the plurality of actuators. The flexible wiring substrate is electrically connected to the plurality of electrodes. The mask plate covers a portion of the surface of the drive base, the plurality of electrodes, and an end portion of the flexible wiring substrate. The mask plate includes a recess portion facing the drive base.

Provided is a liquid droplet forming device including: a liquid container capable of containing a liquid; a membranous member disposed at a bottom of the liquid container and including a discharging hole; a deforming unit capable of deforming the membranous member; and a driving unit configured to drive the deforming unit by outputting a discharging signal for deforming the membranous member to discharge the liquid or a suppressing signal for suppressing residual vibration of the membranous member, wherein the suppressing signal is a signal based on natural vibration period T.sub.0 of the membranous member, wherein an amplitude of the suppressing signal is lower than or equal to an amplitude of the discharging signal, and wherein interval time T.sub.i from when outputting of the discharging signal is ended until when outputting of the suppressing signal is started satisfies a formula: T.sub.i=(m)T.sub.0, where m represents a positive integer.