A liquid ejecting apparatus includes a nozzle for ejecting a liquid, first to fourth pressure chambers communicating with the nozzle, first to fourth driving elements provided corresponding to each of the first to fourth pressure chambers, and a control section that controls the first to fourth driving elements. The control section is capable of executing a first ejection mode in which all of the first to fourth driving elements are driven to eject a liquid from the nozzle, and a second ejection mode in which only some driving elements among the first to fourth driving elements are driven to eject a liquid from the nozzle.

The present disclosure relates to a drive system for a row-connected inkjet apparatus. The system comprises a main control board, a plurality of drive boards, corresponding groups of printing heads, synchronization modules, and communication modules. The main control board sends printing time-sequence synchronization information to each drive board via the synchronization modules and sends printing data via the communication modules. Each printing-head group responds to the drive signal from its corresponding drive board and simultaneously performs jet printing of its assigned portion of the data, thereby enabling rapid spliced printing. This configuration offers broad utility in achieving efficient and precise spliced printing.

Provided are an apparatus and a method for manufacturing a display device. The apparatus includes an ink discharging unit configured to move in a first direction and including a head unit including a plurality of nozzles spaced apart from each other and configured to discharge ink on a substrate and a film member, wherein the ink is discharged through at least one nozzle unit including a plurality of columns, an inspection unit including a film member including a same material as the substrate, a camera unit configured to obtain first image information about the ink discharged on the film member, and a moving unit configured to move the ink discharging unit and the camera unit in the first direction, wherein at least two nozzles to discharge ink are selected from among the plurality of nozzles based on the first image information.

An ejection head includes multiple ejector modules each including an ejector driver element and an ejector heater capable of connecting with the ejector driver element; multiple circulator modules each arranged in a pair with the ejector module, and including a circulator driver element and a circulator heater capable of connecting with the circulator driver element; a group selection circuit configured to select at least one ejector group from among ejector groups into which the multiple ejector modules are divided by a predetermined number, and select at least one circulator group from among circulator groups into which the multiple circulator modules are divided by the predetermined number; and a control unit configured to determine whether or not to enable each of the selections by the group selection circuit based on an operation mode.

A printing apparatus includes: a printing head including first heating resistance elements which generate an energy for ejecting a liquid from ejection ports, and second heating resistance elements which generate an energy for generating a flow of the liquid in a flow passage; and a control unit which controls the printing head based on ejection data indicating ejection/non-ejection for each ejection port, and drive data indicating whether driving is enabled for the second heating resistance elements, the control unit including a heat-level calculation unit deriving a heat level based on the ejection data and the drive data, and a drive pulse generation unit generating a drive pulse in accordance with the derived heat level, wherein the heat-level calculation unit includes a calculation unit which calculates the number of the second heating resistance elements to be simultaneously driven, based on the ejection data and the drive data.

A liquid discharge head includes a common liquid chamber having multiple liquid chambers communicating with each other through the common liquid chamber, a vibration film having multiple nozzles, multiple vibration generators, and a flexible member. The common liquid chamber stores a liquid. The multiple nozzles respectively communicate with the multiple liquid chambers. The multiple vibration generators individually vibrate the vibration film around the multiple nozzles, respectively. The flexible member is opposed to the multiple nozzles in the common liquid chamber. The flexible member is deformable by the liquid in the common liquid chamber vibrated by the vibration film.