A liquid cartridge includes: a cartridge case defining a liquid storage chamber; a liquid supply portion provided at the cartridge case; a residual-amount detecting portion configured to change a state of incident light according to an amount of liquid stored in the liquid storage chamber; and a plate member. The residual-amount detecting portion includes an optical access portion accessible by light traveling in a left-right direction in an attached posture of the liquid cartridge. The plate member is positioned above the liquid storage chamber and frontward of the optical access portion in the attached posture. The plate member is pivotable between a first position and a second position about an axis extending in an up-down direction. In the attached posture of the liquid cartridge, the plate member extends in a front-rear direction at the first position, and extends in a direction crossing the front-rear direction at the second position.

A liquid cartridge includes a case, a liquid supplying portion, a circuit board, a plate member, and a residual-amount detecting portion. The plate member is positioned rearward and above electrodes of the circuit board in an attached posture. The residual-amount detecting portion includes an optical access portion configured to receive light traveling in a left-right direction. The plate member is movable between a first position and a second position. At the first position, a portion of the plate member is positioned frontward of the optical access portion and upward of the electrode group. At the second position, a front end of the plate member is positioned closer to the residual-amount detecting portion than at the first position. The plate member at the first position and the residual-amount detecting portion define therebetween in the front-rear direction a light transmissive region whose light transmittance is higher than the plate member.

A liquid cartridge includes: a cartridge case defining therein a liquid storage chamber; a liquid supply portion; a circuit board; a plate member; and a residual-amount detecting portion. The residual-amount detecting portion is configured to change a state of incident light according to an amount of the liquid stored in the liquid storage chamber, and includes an optical access portion on which light traveling in a left-right direction is incident. The plate member is pivotally movable between: a first posture where a portion of the plate member is positioned upward relative to the optical access portion; and a second posture where the plate member is positioned downward relative to the optical access portion. The plate member in the first posture and the residual-amount detecting portion define a light transmissive region therebetween in the front-rear direction. The light transmissive region has a light transmittance greater than that of the plate member.

A liquid discharge device includes a head including a discharge port. The head discharges a liquid from the discharge port toward an object. The liquid discharge device further includes a liquid receiving surface to receive the liquid discharged from the discharge port, a liquid collector to collect the liquid received by the liquid receiving surface, and a moving unit to hold the liquid receiving surface and the liquid collector. The moving unit is movable at a facing position where the liquid receiving surface faces the discharge port without changing an inclination of the liquid collector with respect to a horizontal plane.

A liquid container to be mounted in a liquid ejection apparatus contains liquid to be ejected from the liquid ejection apparatus. The liquid container comprises a liquid container bag containing liquid, at least one tube arranged in the inner space of the liquid container bag and having the first end open to the inner space, a connection member fitted to the aperture of the liquid container bag and connected to the second end of the tube and a holding member supported by the connection member and arranged in the inner space to hold the tube, the holding member having at least a groove for receiving the tube to be fitted thereinto at a position thereof other than the second end thereof. The holding member can integrally be molded.

A method for controlling a regenerated chip, a regenerated chip, and a regenerated ink cartridge are provided. The regenerated chip is electrically connected to a printer by means of a first data signal wire and a logic signal wire, and is electrically connected to an ink cartridge chip by means of a second data signal wire. The method for controlling a regenerated chip includes: detecting an operation command sent by the printer by means of the first data signal wire and the logic signal wire; and when it is detected that the operation command is not a selected operation command, sending a data signal to the ink cartridge chip by means of the second data signal wire, wherein the data signal instructs the ink cartridge chip to communicate with the printer.

In one example in accordance with the present disclosure, a print fluid refill system is described. The print fluid refill system includes a reservoir to hold a volume of print fluid to be supplied to a printhead. The print fluid refill system also includes a pump to 1 ) draw print fluid from the reservoir via a reservoir line and 2) transport print fluid to a reserve tank via a reserve line. The print fluid refill system also includes the reserve tank to, during refill of the reservoir, supply print fluid to a printhead via a printhead line. The reserve tank supplies print fluid to the printhead when fluid is passed to the reservoir via a return line.

In one example in accordance with the present disclosure, a print fluid refill system is described. The print fluid refill system includes a reservoir to hold a volume of print fluid to be supplied to a printhead. The print fluid refill system also includes a pump to 1 ) draw print fluid from the reservoir via a reservoir line and 2) transport print fluid to a reserve tank via a reserve line. The print fluid refill system also includes the reserve tank to, during refill of the reservoir, supply print fluid to a printhead via a printhead line. The reserve tank supplies print fluid to the printhead when fluid is passed to the reservoir via a return line.

An inkjet printing apparatus, method of printing ink using the same and method of fabricating display device are provided. The method of printing ink includes: ejecting ink in which a plurality of particles is dispersed from an inkjet head; irradiating the ejected ink with a first light and a second light having different wavelengths to acquire data on a first exit light and a second exit light emitted from the ink; calculating a concentration of the particles in the ink from the data on the first exit light and the second exit light; and checking whether the concentration is out of an error range from a reference value, where the first light has a wavelength of about 500 nm or less, and the second light has a wavelength of about 1000 nm or more.

A heater includes an irradiator configured to irradiate a heating object including a liquid attachment region, onto which a liquid is applied, with an active energy ray, and circuitry configured to control an output of the active energy ray emitted from the irradiator to an edge portion in the liquid attachment region of the heating object to be larger than an output of the active energy ray emitted from the irradiator to a non-edge portion in the liquid attachment region excluding the edge portion.