Abstract: A liquid recording head includes thermal energy generating means, having a flat plate configuration, for generating a bubble by thermal energy; a pressure chamber in which said thermal energy generating means is provided; a flow path for introducing liquid into said pressure chamber; a supply port in fluid communication with said flow path; and an ejection outlet provided at a position opposing said thermal energy generating means in fluid communication with said pressure chamber, wherein said thermal energy generating means includes a first major surface facing said ejection outlet and a second major surface opposite said first major surface, and wherein a distance between said first major surface and ceiling surface of said pressure chamber in which said ejection outlet is formed is shorter than a distance between said second major surface and a bottom surface of said pressure chamber.

Abstract: The present invention provides a print head that allows the characteristics of ejected ink to be adjusted for each ejection port in spite of a variation in the distance from an ink supply port to the heating element. In the print head according to the present invention, the area of the heating element decreases with increasing distance from the ink supply port and increases with decreasing distance from the ink supply port. The heating element is shaped like a rectangle that is longer in a direction orthogonal to a direction in which the plurality of ejection ports are arranged than in the direction in which the plurality of ejection ports are arranged. The aspect ratio of the heating element depends on the length of an ink channel through which ink is introduced into the bubbling chamber.

Abstract: A scanning speed for a carriage and a number of multi-pass are set in accordance with print density information of dots obtained from image data. This makes it possible to preferably output an image free from the occurrence of an end deviation without reducing throughput to a required extent or more.

Abstract: An ink jet recording head and an ink jet recording apparatus are provided to prevent occurrence of a white line or recording unevenness due to a head tilt, and realize a high image quality recording. For this purpose, in a recording head provided with nozzles ejecting three types of droplets, a large droplet, medium droplet and small droplet, nozzles are configured such that any nozzles are not arranged on the same line at the centers thereof in the main scanning direction.

Abstract: A liquid ejecting head includes a plurality of ejection outlets for ejecting droplets; liquid flow paths in fluid communication with said ejection outlets; and a liquid supply opening for supplying the liquid to said liquid flow path; wherein said ejection outlets include first ejection outlets and second ejection outlets which are disposed at least at one side of said liquid supply opening, wherein said first ejection outlets are nearer from said liquid supply opening than said second ejection outlets, and said first ejection outlets and said second ejection outlets are arranged in a staggered fashion; first recording elements for said first ejection outlets; second recording elements for said second ejection outlets, wherein each of said first recording elements includes one heat generating resistor in the form of a rectangular shape having a long side extending along a direction crossing with an arranging direction of said ejection outlets; and wherein said second recording element includes a plurality of

Abstract: An ink jet head movable in a main scan direction includes first and second groups of ejection outlet arrays disposed on either side of a common liquid chamber and including plural ejection outlet arrays. In the first group, amounts of liquid ejected from outlets of first and second ejection outlet arrays, which are staggered, differ from each other. In the second group, a common ejection amount ejection outlet array ejects the same amount of liquid as that of one of the first and second ejection outlet arrays and a non-common ejection amount ejection outlet array ejects an amount of the liquid that differs from that of the first ejection outlet array group. The ejection outlets of the common and non-common ejection amount ejection outlet arrays are disposed in a staggered arrangement. The ejection outlets of the second ejection outlet array group are disposed with deviation of ½ of an interval at which the ejection outlets of the first ejection outlet array group are arranged.

Abstract: An ink jet recording head includes one ink flow path array corresponds to one recording element array, and a distance (La) between one end portion of said ink flow path and said other end portion thereof across said ink supply opening in said one ink flow path array is substantially equal to a distance (Lb) between one end portion of said ink flow path corresponding to the recording element located relatively far from said supply opening and said other end portion thereof across said ink supply opening in said other ink flow path array.

Abstract: A liquid discharge head substrate has improved protection performance of protective films for protecting heaters while effective bubble-forming regions are being secured. The protective films for protecting a plurality of heating elements provided on a substrate are formed using a platinum group element and are separately provided for the respective heating elements.

Abstract: A base member for an ink jet head in which a heat accumulation layer, a heat generating member generating heat energy used to discharge ink, and protection film for protecting the heat generating member are formed in succession on a substrate, characterized in that the heat resistance value of a portion of the heat accumulation layer which is under the heat generating member is two times or greater and less than five times as great as the heat resistance value of a portion of the protection film which is on the heat generating member.

Abstract: In a recording apparatus using a recording head which can eject ink droplets having different sizes, there is a problem the recording image quality is decreased or mist is generated when the recording is performed to a predetermined area of a recording medium In the ink droplets having the different sizes, the size of the ink droplet used for the recording is set in accordance with the recording area to perform the recording based on the setting.

Abstract: An ink jet recording head is provided with one heat generating member in each of ink flow paths, and the discharge port thereof is arranged on the extended line extending in the normal direction from the center of the main surface of the heat generating member to the surface of the substrate. Then, on the surface of the substrate, non-bubbling area is provided on the center within the projected area having the discharge port projected thereon. Bubble brought to the boil by the heat generating member pushes out ink from the discharge port by the pressure exerted by the bubble, while being communicated with the outside. With the structure thus arranged, it is made possible to enhance the precision of discharge direction of the liquid droplet discharged from the discharge port.

Abstract: A liquid discharge head including: a substrate having a plurality of energy generating elements for generating heat energy for use in discharging liquid; and a plurality of nozzles provided correspondingly to the plurality of energy generating elements, wherein each of the nozzles includes a chamber provided with the energy generating element, a second discharge portion, and a first discharge portion and wherein the central axis of the second discharge portion is offset from the central axis of the first discharge portion in the nozzle arrangement direction.

Abstract: An ink jet recording head is provided with one heat generating member in each of ink flow paths, and the discharge port thereof is arranged on the extended line extending in the normal direction from the center of the main surface of the heat generating member to the surface of the substrate. Then, on the surface of the substrate, non-bubbling area is provided on the center within the projected area having the discharge port projected thereon. Bubble brought to the boil by the heat generating member pushes out ink from the discharge port by the pressure exerted by the bubble, while being communicated with the outside. With the structure thus arranged, it is made possible to enhance the precision of discharge direction of the liquid droplet discharged from the discharge port.

Abstract: To drive an inkjet printhead having an array of printing elements, where the first and second printing elements which discharge relatively different amounts of ink are arranged on the same array in a predetermined direction, print data for the first or second printing element is serially inputted, the inputted print data is sequentially stored, the stored print data is latched, a selection signal indicative of which of the first or second printing element is to be driven is inputted, a driving signal indicative of a driving period is inputted, and respective printing elements are driven in accordance with the latched print data, the selection signal, and the driving signal. Accordingly, it is possible to reduce the cost of the printhead having plural types of printing elements, which discharge relatively different amounts of ink, and possible to easily control driving of the printhead.

Abstract: A liquid ejection recording head for effecting recording by ejecting first liquid and second liquid which is a different kind of liquid through different ejection outlets, while bidirectionally scanning a recording material in a scanning direction includes a group of first ejection outlet arrays each of which has a plurality of ejection outlets at predetermined intervals arranged in a direction different from the scanning direction, wherein corresponding ejection outlets in the respective ejection arrays are aligned in the scanning direction; a group, disposed adjacent the group of the first ejection outlet arrays, of second ejection outlet arrays arranged in a manner similar to the first ejection outlet array group; wherein the first ejection outlet arrays include a first ejection outlet array for ejecting the first liquid and a second ejection outlet array for ejecting the second liquid; wherein the second ejection outlet arrays include a third ejection outlet array for ejecting the first liquid and a fourt

Abstract: An ink jet head according to the present invention includes multiple discharge ports for discharging ink, multiple ink flow paths for communicating with the discharge ports, and heat generating elements for generating bubbles in ink filling the ink flow paths. For each ink flow path, two heat generating elements are arranged therein, and the discharge port is arranged along a line that is extended, from the center of a pressure generation region formed by the two heat generating elements, in the normal direction relative to the surface of the substrate. The arrangement pitch of the heat generating elements is equal to or greater than 600 dpi, and the interval dhn between a partition wall defining an ink flow path and the heat generating element adjacent to the partition wall is equal to or smaller than 4 ?m.

Abstract: An ink jet recording head is provided with one heat generating member in each of ink flow paths, and the discharge port thereof is arranged on the extended line extending in the normal direction from the center of the main surface of the heat generating member to the surface of the substrate. Then, on the surface of the substrate, non-bubbling area is provided on the center within the projected area having the discharge port projected thereon. Bubble brought to the boil by the heat generating member pushes out ink from the discharge port by the pressure exerted by the bubble, while being communicated with the outside. With the structure thus arranged, it is made possible to enhance the precision of discharge direction of the liquid droplet discharged from the discharge port.

Abstract: A liquid ejection recording head for effecting recording by ejecting first liquid and second liquid which is a different kind of liquid through different ejection outlets, while bidirectionally scanning a recording material in a scanning direction includes a group of first ejection outlet arrays each of which has a plurality of ejection outlets at predetermined intervals arranged in a direction different from the scanning direction, wherein corresponding ejection outlets in the respective ejection arrays are aligned in the scanning direction; a group, disposed adjacent the group of the first ejection outlet arrays, of second ejection outlet arrays arranged in a manner similar to the first ejection outlet array group; wherein the first ejection outlet arrays include a first ejection outlet array for ejecting the first liquid and a second ejection outlet array for ejecting the second liquid; wherein the second ejection outlet arrays include a third ejection outlet array for ejecting the first liquid and a fourt

Abstract: An ink jet recording head is provided with one heat generating member in each of ink flow paths, and the discharge port thereof is arranged on the extended line extending in the normal direction from the center of the main surface of the heat generating member to the surface of the substrate. Then, on the surface of the substrate, non-bubbling area is provided on the center within the projected area having the discharge port projected thereon. Bubble brought to the boil by the heat generating member pushes out ink from the discharge port by the pressure exerted by the bubble, while being communicated with the outside. With the structure thus arranged, it is made possible to enhance the precision of discharge direction of the liquid droplet discharged from the discharge port.

Abstract: An ink jet head includes a substrate provided with heat generating members for generating a bubble in ink on a surface of the substrate, a plurality of discharge ports for discharging the ink, the ports opposed to the surface of the substrate, and a plurality of ink flow passages communicating with the plurality of discharge ports to feed the ink. A plurality of the heat generating members is provided in each of the ink flow passages, and the discharge port is arranged on an extension line extending from a center of a pressure generating area composed of the plurality of heat generating members toward the surface of the substrate in a normal direction. Moreover, a distance dhc between centers of each of two heat generating members arranged most apart from each other among the plurality of heat generating members is set to be larger than a diameter do of an aperture of the discharge port.