Abstract: An inkjet printhead board and inkjet printhead is provided having a reliable storage element which allows for print without causing damages to an interlayer insulation film and protection film upon printing data unique to the printhead and is free from the restriction in arrangement position. For this purpose, a printing device board uses therein an information storage element formed common in material and process to electro-thermal converter element, the resistance value of which is changed to enable information storage so that information can be read out of the information storage element.

Abstract: An element substrate has a plurality of printing elements, and a block selection unit which divides the plurality of printing elements into a plurality of blocks and time-divisionally drives the blocks. The element substrate includes a plurality of input terminals which divide the plurality of printing elements included in each block into a plurality of groups and supply a driving voltage to the printing elements belonging to each group, a delay circuit which externally receives an enable signal for enabling energization to the printing elements and generates a plurality of delayed enable signals having different delay times with respect to the enable signal, and a wiring which supplies the enable signal and the plurality of delayed enable signals output from the delay circuit to different groups in the order of the different delay times.

Abstract: A small-size element substrate with high electrical efficiency can be achieved when a plurality of printing element arrays having the same discharge amount exist on a single element substrate, and transistors which form driver arrays corresponding to the respective printing element arrays are formed at different array densities including transistors which form a driver array corresponding to a printing element array having a different discharge amount. The area of each transistor of the first driver array corresponding to the first printing element array is set larger than that of each transistor of the second driver array corresponding to the second printing element array. The wiring width of the first power supply wiring pattern corresponding to the first printing element array in a direction perpendicular to the printing element array is set smaller than that of the second power supply wiring pattern corresponding to the second printing element 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: 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 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 such as to surround the ink supply port.

Abstract: An element substrate has a plurality of printing elements, and a block selection unit which divides the plurality of printing elements into a plurality of blocks and time-divisionally drives the blocks. The element substrate includes a plurality of input terminals which divide the plurality of printing elements included in each block into a plurality of groups and supply a driving voltage to the printing elements belonging to each group, a delay circuit which externally receives an enable signal for enabling energization to the printing elements and generates a plurality of delayed enable signals having different delay times with respect to the enable signal, and a wiring which supplies the enable signal and the plurality of delayed enable signals output from the delay circuit to different groups in the order of the different delay times.

Abstract: Provided is a configuration for connecting common wires (a common power supply wire for connecting a plurality of printing elements commonly to a power supply and a common ground wire for connecting the plurality of printing elements commonly to a ground) to the outside, which configuration does not obstruct a constitution for reducing resistances of the common wires. For this purpose, the common wires are directly connected respectively to electrode leads of an electric wiring tape for external connection without use of electrode pads. In the case of this configuration, the widths of the common wires need not be narrower in vicinities of the electrode pads which would otherwise be in an edge of the board, and accordingly reduction of resistances of the common wires is not obstructed.

Abstract: An element substrate includes a plurality of printing elements, a plurality of driving circuits which drive the plurality of printing elements, an input unit which inputs an enable signal to define the driving period of each printing element, a shift register which inputs a print data, a latch circuit which stores, in accordance with an externally input latch signal, the print data output from the shift register and outputs a print data signal, a time-divisional selection circuit which generates a block selection signal to divide the plurality of printing elements into a plurality of blocks and time-divisionally drive the printing elements, and a delay unit which changes the drive timing between the printing elements in a single block. The delay unit delays the enable signal and the print data signal.

Abstract: A printhead in which the voltage fluctuation absorption range of a MOS transistor serving as a constant current source is narrowed according to constant current driving. The printhead includes a controller which controls voltage fluctuations to adjust a current supplied to a plurality of printing elements. The printhead also includes a DC/DC converter which outputs a voltage of a voltage value to be applied to a plurality of printing elements from outside a printing element substrate.

Abstract: An element substrate has a plurality of printing elements, and a block selection unit which divides the plurality of printing elements into a plurality of blocks and time-divisionally drives the blocks. The element substrate includes a plurality of input terminals which divide the plurality of printing elements included in each block into a plurality of groups and supply a driving voltage to the printing elements belonging to each group, a delay circuit which externally receives an enable signal for enabling energization to the printing elements and generates a plurality of delayed enable signals having different delay times with respect to the enable signal, and a wiring which supplies the enable signal and the plurality of delayed enable signals output from the delay circuit to different groups in the order of the different delay times.

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: Even when a contact connection failure of electrical connection occurs between a recording head including a recording element substrate, and a recording apparatus, continuous driving of the same heat generating resistive element is suppressed. Blocks in which heat generating resistive elements are not driven are prepared beforehand in a selection target of blocks to be driven in a time-division manner. When an input signal is in a predetermined condition, the block selection target is set to blocks in which heat generating resistive elements are not driven.

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: A method of manufacturing a liquid-discharge-head substrate is provided, which includes a plurality of elements for discharging liquid, and a heating member for heating the liquid-discharge-head substrate, the method including the steps of preparing a substrate having an insulating layer made of an insulating material provided on or above the substrate, providing a conductive layer made of a conductive material, and forming a conductive line being configured to supply current for driving the element and a part of a heating member by using the conductive layer.

Abstract: A liquid ejection substrate used to eject a liquid includes a substrate having an element row including a plurality of elements provided in a row, where each of the elements generates energy, drive circuits that drive and control the elements, a signal line that is shared by and connected to the drive circuits, the signal line being provided along the element row, and a heating portion generating heat used to heat the substrate, wherein the heating portion is provided so that the heating portion does not overlap the signal line with reference to a direction perpendicular to a face of the substrate.

Abstract: A liquid discharge recording head includes a substrate having a liquid supply opening facilitating supplying liquid and heating resistors for generating energy for discharging the liquid, a flow path member having discharge openings and flow paths including first and second flow paths that are adjacent each other, the second flow path being longer than the first flow path, and a first resister corresponding to the first flow path and a second resistor corresponding to the second flow path, each of the first and second resistors being disposed at an area of the flow path member which is situated in correspondence with the liquid supply opening, wherein an amount of protrusion of the first resister at a side of the first flow path is greater than an amount of protrusion of the second resister at a side of the second flow path.

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: There are provided a printing head substrate, an ink jet printing head and an ink jet printing apparatus, which accurately detect a temperature state in the central part of a heater array on the substrate and restrict an area of the substrate to a minimum. A printing head substrate has a plurality of heating elements, a plurality of ink supply openings, a logic circuit for driving the heating elements; a substrate temperature detecting element for detecting a temperature of the printing head substrate, and input and output pads for carrying out reception and supply of a signal between a printing apparatus, and the logic circuit and the substrate temperature detecting element, wherein a beam integral with the substrate is provided between the plurality of ink supply openings, and the substrate temperature detecting element is arranged on the beam.

Abstract: An inkjet printhead substrate includes: a heat generating element configured to generate energy for ejecting ink; an electric wire electrically connecting the heat generating element and an electrode lead provided on a flexible film wiring substrate; a protecting film configured to protect the electric wire; an electrode pad to which the electrode lead is connected, the electrode pad being formed by providing an opening in the protecting film at a position above the electric wire; a region to which a sealing resin configured to protect an electrically connected portion of the electrode pad and the electrode lead is to be applied; and an ink-detecting electrode composed of a metal wire and formed at the region to which the sealing resin is to be applied. The metal wire has a smaller width than an opening provided in the protecting film from which the metal wire is exposed.