摘要:
A printhead, constructed with a plurality of common-type element substrates which sandwich a connecting board, which performs printing by utilizing a common-type control signal. The element substrate integrates: a plurality of heaters 101 which are arrayed in one line, power transistors 102, a shift register 104, a latch circuit 117, an AND circuit 119, terminals 114 to 116 for inputting block-selection signals, a terminal 120 for inputting an inverse instruction signal which instructs to invert the block selection signal, a block inverter 121 for inverting the block-selection signal in accordance with the inverse instruction signal, and a 3 to 8 decoder 118 for selecting one of a plurality of blocks. By utilizing a printhead where at least two of the element substrate are arranged opposite to each other, and where plural arrays of printing elements are formed, printing is performed by dividing a plurality of printing elements into a plurality of blocks and time-divisionally driving each block. When this printing is performed, the inverse instruction signal inverts the order of block selection which has been inverted because of the element substrates arranged opposite to each other.
摘要:
In accordance with the present invention, there is provided a liquid discharge head comprising a discharge port for discharging liquid, a liquid flow path provided with a bubble generation means for generating bubbles in liquid and communicated with the discharge port, and a movable member provided facing said bubble generation means in said liquid flow path and having a free end on a downstream side toward the discharge port, a first surface provided with the bubble generation means being continued to at least one second surface of the side wall surface of said liquid flow path and the front end surface having the opening of the discharge port with a curved surface, the first surface being one of surfaces forming the liquid flow path.
摘要:
A liquid discharge head, a liquid discharging apparatus having such a liquid discharge head, and a method for manufacturing such a liquid discharge head. The liquid discharge head is provided with a top plate including a plurality of ink discharge ports for discharging ink droplet, a plurality of first liquid passages for supplying ink in correspondence to the plurality of ink discharge ports and a common liquid chamber for supplying the ink to the first liquid passages, a liquid discharge head substrate obtained by forming second liquid passages arranged adjacent to the first liquid passages and including bubble generating areas on a substrate on which a plurality of heat generating elements for causing the ink discharge port to discharge the ink droplets and including drivers for driving the heat generating elements, and a movable diaphragm for completely isolating the first liquid passages and the second liquid passages from each other and displaceable by a bubble generated on the heat generating element. The method includes a movable diaphragm forming step for providing the movable diaphragm in such a manner that a portion for fixing the movable diaphragm is covered.
摘要:
A liquid discharging head comprises a discharging port for discharging liquid, a liquid flow path communicated with said discharging port, a bubble generating region for causing the liquid to generate a bubble and a movable member having provided thereon a free end disposed facing to said bubble generating region, and on the downstream of said liquid flow path directed toward said discharging port. At least when said movable member is in stationary state, a side of said liquid flow path corresponding to said bubble generating region is substantially composed of all with a wall face and common communicating space for commonly communicating said liquid flow path with a neighboring liquid flow path is provided in the upward of a movable section of said movable member.
摘要:
A method for producing a liquid discharge head provided with an element substrate and a ceiling plate which are fixed in a mutually opposed state, plural liquid path walls provided between said ceiling plate and said element substrate and defining plural liquid paths, plural discharge energy generating elements provided in parallel manner on the surface of said element substrate so as to be respectively positioned in said plural liquid paths, and plural movable members provided on said element substrate so as to respectively oppose said plural discharge energy generating elements and formed like a cantilever, fixed at the upstream ends in the flowing direction of the liquid in said liquid paths and having free ends at the downstream ends, the method comprising the steps of forming a gap forming member in a position, forming a first material layer, patterning an anti-etching protective film, forming a second material layer, removing a portion of said second material layer, cutting said element substrate, and removing said gap forming member.
摘要:
A method for manufacturing liquid discharge heads is provided with discharge ports for discharging liquid, liquid flow paths communicated with the discharge ports for supplying liquid to the discharge ports, a substrate having heat generating members for creating bubbles in liquid, and movable members facing the heat generating members, each being arranged in each liquid flow path, having the free end on the discharge port side with a specific gap with the heat generating member. This method comprises the steps of forming the boundary layer used for providing a gap between the movable member and the substrate above the heat generating member on the substrate, of laminating the movable member on the boundary layer so as to position the free end above the heat generating member, at the same time fixing the movable member on the substrate, and of forming the gap between the movable member and the heat generating member by use of the boundary layer. With the structure thus arranged, there is no need for the step to position the movable member with the substrate, and also, the movable portion of the movable member is separated from the substrate after the movable member is formed on the substrate and incorporated in the liquid discharge head so as to implement arranging the interior of each liquid flow path finer and more precisely.
摘要:
A method for manufacturing ink jet recording heads includes the steps of forming a film of a first inorganic material in the form of ink flow path pattern using a soluble first inorganic material on the substrate having ink-discharge, pressure-generating elements formed thereon, forming a film of a second inorganic material becoming ink flow walls on the film of the first inorganic material using the second inorganic material, forming ink-discharge openings on the film of the second inorganic material above the ink-discharge, pressure-generating elements, and eluting the film of the first inorganic material. With this method, it becomes possible to set the ink-discharge, pressure-generating elements and the ink-discharge openings (ports) of each head with extremely high precision in a shorter distance with a good reproducibility to record images with higher quality and without any deformation of the head due to the applied heat, while providing a good resistance to ink and erosion, as well as a higher dimensional precision and reliability that may be affected otherwise by swelling or the like.
摘要:
A printhead compatible with various printers, e.g. a printer having low print density or a printer having high print density, enables printing in the best capability of the printer. The printhead comprises: a determination circuit 24 which determines a type of a printer incorporating the printhead, and switches SW1 and SW2 which select a method of driving the printhead according to in the printer, on the basis of the determination result by the determination circuit 24. When the printhead is installed in the printer capable of printing at 360 dpi, four print dots printed at 720 dpi substantially express one dot printed at 360 dpi. Meanwhile, when the printhead is installed in the printer capable of printing at 720 dpi, one print dot expresses one dot printed at 720 dpi.
摘要:
A liquid discharge head is provided with discharge ports for discharging liquid, liquid flow paths communicated with the discharge ports for supplying liquid to the discharge ports, a substrate having heat generating members for creating bubbles in the liquid, and movable members facing the heat generating members and being arranged in the liquid flow paths. The movable members have a free end on the discharge port side with a specific gap with respect to the heat generating members. The movable member is fixed to the substrate above the heat generating member on the substrate.
摘要:
In a liquid discharge head having an element substrate on the surface of which are provided in parallel a plurality of discharge energy generating elements generating heat energy for creating a bubble in liquid, a fixed portion provided on the element substrate so as to face the plurality of discharge energy generating elements, and fixed to the element substrate, and a plurality of movable members comprising a movable portion extending from the end portion of the fixed portion and displaced by the bubble, a fulcrum about which the movable portion is displaced is located on the movable portion other than a corner portion formed at the boundary between the movable portion and the fixed portion.