There is provided a drive method of a liquid discharge apparatus including a first liquid discharge section having a first piezoelectric element applying a pressure to a liquid in a first pressure chamber be communicated with a first nozzle, a first drive line coupled to the first piezoelectric element, and a first resistor that is configured to measure a temperature of the liquid in the first pressure chamber, a second liquid discharge section having a second piezoelectric element applying a pressure to a liquid in a second pressure chamber be communicated with a second nozzle. The method includes: detecting a potential of first resistor when a state of a potential applied to the first drive line is in a state of causing no liquid to be discharged from the first nozzle, during an execution period of a first printing process of printing a first image on a recording medium.

A liquid ejecting head includes a nozzle that ejects a liquid, a flow path member formed with a flow path that guides the liquid to the nozzle, a supply path member formed with a supply path that supplies the liquid to the flow path member, and a heater that heats the supply path member. A linear expansion coefficient of the supply path member is greater than a linear expansion coefficient of the flow path member. The flow path member and the supply path member are joined together by a thermoset adhesive. The heater is provided to the supply path member.

A recording apparatus includes a recording head having a plurality of recording elements configured to generate energy for discharging ink, a first heating element configured to heat ink in the vicinity of one of said recording elements positioned at a first position, insufficiently to discharge ink, and a second heating element positioned at a second position different from the first position, which are arranged on a same substrate, a heating control unit configured to control the heating operation of the ink by driving the first and the second heating elements by applying voltage to the first and the second heating elements, and a recording control unit configured to control the recording operation by driving the plurality of recording elements, wherein the heating control unit is configured to control the heating operation to drive the first heating element and the second heating element at timings different from each other.

An inkjet recording apparatus includes a conveying unit, a recording unit, a heat source, a heat source moving unit and a heat source moving control unit. The conveying unit performs a conveying operation to move a conveying member thereby conveying a recording medium placed on a conveying surface of the conveying member. The recording unit records an image by ejecting ink to the recording medium conveyed by the conveying unit. The heat source moving unit moves the heat source. The heat source moving control unit moves the heat source by the heat source moving unit such that a distance between the heat source and the conveying surface increases when the conveying operation which is performed by the conveying unit stops in a manner in which the conveying operation can be resumed in a state where the heat source is positioned in proximity of the conveying surface.

An inkjet printer includes an ink tank in which an ink is stored, an ink head that ejects the ink onto a recording medium, an ink supply passage connected to the ink tank and the ink head, a light emitter that irradiates the ink ejected onto the recording medium with ultraviolet radiation, and a heat relay connected to the light emitter to transfer heat emitted by the light emitter to at least one of the ink supply passage and the ink head.

A temperature sensor detects temperature of ink to be supplied to a plurality of nozzles. When, upon receiving a print request, a detection temperature detected by the temperature sensor is lower than a reference temperature, a control portion executes a preliminary vibration control to cause an ink meniscus oscillation to occur in each of the nozzles by vibrating the piezoelectric elements, and after the detection temperature increases up to the reference temperature, executes an ink ejection control to cause the ink to be ejected from the nozzles by vibrating the piezoelectric elements in correspondence with an output target image of a print request. When, upon receiving the print request, the detection temperature is higher than the reference temperature, the control portion executes the ink ejection control without executing the preliminary vibration control.

A printer includes a clear ink tank, a color ink tank, a clear ink injection head, a color ink injection head, a light source, and a controller. The controller includes a matte printing controller structured or programmed to cause clear ink to be injected from the clear ink injection head and to be irradiated by the light source to form a matte clear ink layer on a recording medium; and a color printing controller structured or programmed to cause color ink to be injected from the color ink injection head to form a color ink layer on the clear ink layer

A liquid ejecting head includes a nozzle that ejects a liquid, a flow path member formed with a flow path that guides the liquid to the nozzle, a supply path member formed with a supply path that supplies the liquid to the flow path member, and a heater that heats the supply path member. A linear expansion coefficient of the supply path member is greater than a linear expansion coefficient of the flow path member. The flow path member and the supply path member are joined together by a thermoset adhesive. The heater is provided to the supply path member.

An ejection apparatus is provided with a plurality of ejection units, a controller that controls a temperature of a liquid, and a supply mechanism that includes a plurality of supply units. The plurality of supply units flow the liquid in a predetermined flow direction. Respective portion of the plurality of supply units in the flow direction are connected to the ejection units to supply the liquid to the ejection units. A downstream side portion of one of the supply units in the flow direction is connected to another one of supply units via a heat transfer member.

A nozzle unit has a first heater, a first temperature sensor, and a drive circuit. The second heater heats the nozzle unit from outside. A second temperature sensor detects a temperature outside the nozzle unit. A control portion adjusts power supplied to the first heater by a first temperature feedback control. The control portion operates the cooling device when a temperature detected by the first temperature sensor exceeds an allowable temperature while the first temperature feedback control is being executed. The control portion stops the supply of power to the first heater and the drive circuit when a pause condition is met. The control portion adjusts the power supplied to the second heater 52 by a second temperature feedback control in a paused state.