Abstract:
A print head is provided that well preserves ink characteristics upon printing by way of performing effective ink preliminary heating. The print head has heaters and ejection openings formed at locations corresponding to the heaters. Viewed from the side from which ink is ejected, a sub-heater is established in the print head between the ink supply port and the print elements so as to surround the ink supply port.
Abstract:
This invention is directed to a print element substrate including a plurality of print element arrays in which different numbers of print elements are arranged. The print element substrate can efficiently transfer data to each print element and efficiently lay out circuits. The print element substrate includes the following arrangement. More specifically, a first print element array having a relatively large number of print elements, and a plurality of second print element arrays which are equal in length to the first print element array and smaller in the number of print elements than the first print element array are juxtaposed. The print element substrate includes one shift register which holds data for driving the print elements of the first print element array, and one shift register which holds data for driving the print elements of the second print element arrays.
Abstract:
A liquid-discharging recording head includes first and second substrates each having an energy generating element and a supply port, and a support member on which the substrates are arranged. The first substrate is provided on one side in a longitudinal direction of the support member, and the second substrate is provided on an other side in the longitudinal direction of the support member. A driving circuit configured to drive the energy generating element is provided in a larger region between an end of a supply port in the first substrate on the other side in the longitudinal direction and an end of the first substrate on the other side and in a larger region between an end of a supply port in the second substrate on the one side in the longitudinal direction and an end of the second substrate on the one side.
Abstract:
This invention is directed to allow efficiently transferring data to each print element (heater) and efficiently laying out circuits in an element substrate including plural heater arrays in which different numbers of heaters are arranged. This substrate includes: a first array having a relatively large number of heaters; and a second array which is equal in length to the first array and has a relatively small number of heaters. These arrays are juxtaposed. The substrate further includes plural shift registers equal in number to the heater arrays of the substrate. The shift registers include a shift register which holds some data for driving the heaters of the first heater array, and data for driving the heaters of the second heater array. The shift registers further include a shift register which holds data other than some data for driving the heaters of the first heater array.
Abstract:
This invention relates to an element substrate capable of confirming an electrical connection status before a printhead malfunctions. The element substrate is a substrate for a printhead, which is detachable from a printing apparatus and includes a plurality of printing elements, a logical circuit for controlling the printing elements, and a voltage application terminal for applying a driving voltage to drive the printing elements. The logical circuit is driven at a voltage lower than the driving voltage. The element substrate includes a connection status output circuit which outputs a signal reflecting the electrical connection status between the printhead and the printing apparatus on the basis of the driving voltage.
Abstract:
A liquid discharge head of the present invention comprises a substrate and a flow path wall member provided on the substrate and having a wall of a flow path communicated with a discharge port for discharging liquid, wherein said flow path wall member is provided with a cavity not communicated with said flow path, when viewed in a direction from said discharge port toward said substrate, said cavity has a shape of a character, and said character corresponds to information regarding said liquid discharge head.
Abstract:
This invention relates to a printhead element substrate having a plurality of electrothermal transducers and a plurality of switching elements which drive the plurality of electrothermal transducers. The element substrate has a level converter which is shared by adjacent electrothermal transducers and steps up an input driving signal, and a switch circuit which supplies the driving signal output from the level converter to one of the adjacent electrothermal transducers. The switch circuit switches the supply destination of the driving signal in accordance with an external input selection signal.
Abstract:
An ink jet recording head substrate is provided with: an array of a plurality of energy generating bodies for generating energy utilized to discharge ink; and an ink supply port arranged along the array to supply ink to the plurality of energy generating bodies, the array and the ink supply port each extending in a longitudinal direction of the ink jet recording head substrate, the ink jet recording head substrate comprising: a first terminal electrically connected with the plurality of energy generating bodies, the first terminal being arranged along beside a first side of the ink jet recording head substrate, the first side extending in a cross direction intersecting the longitudinal direction; and a second terminal electrically connected with the plurality of energy generating bodies, the second terminal being arranged beside a second side of the ink jet recording head substrate, the second side extending in the longitudinal direction, so as to be arranged in an area between the first side and a phantom line that passes through a longitudinal end of the ink supply port closer to the first side and extends in the cross direction.
Abstract:
This invention is directed to allow efficiently transferring data to each print element (heater) and efficiently laying out circuits in an element substrate including plural heater arrays in which different numbers of heaters are arranged. This substrate includes: a first array having a relatively large number of heaters; and a second array which is equal in length to the first array and has a relatively small number of heaters. These arrays are juxtaposed. The substrate further includes plural shift registers equal in number to the heater arrays of the substrate. The shift registers include a shift register which holds some data for driving the heaters of the first heater array, and data for driving the heaters of the second heater array. The shift registers further include a shift register which holds data other than some data for driving the heaters of the first heater array.