Abstract:
PROBLEM TO BE SOLVED: To provide a maintenance method in which effects of foreign substance and bubbles can be removed from an ejection head where many ejecting parts are arranged in array even without using the pressurization action and the suction action. SOLUTION: Liquid droplets are continuously ejected from one or more ejecting parts not adjacent to each other. When the continuous ejection action of liquid droplets ends, the continuous ejection action of liquid droplets is repeatedly carried out sequentially one by one for the ejecting part next adjacent in a specific direction to the present liquid droplet ejection position. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To propose a gradation conversion technology providing excellent gradation reproducibility whereby a sweeping phenomenon and a pseudo contour are not caused as a principle. SOLUTION: The processing for converting an image density signal with an m-value (m is a natural number) into an image density signal with an n-value (n
Abstract:
PROBLEM TO BE SOLVED: To prevent an image quality from being deteriorated due to a density unevenness or a white streak. SOLUTION: An apparatus for discharging a liquid includes a discharge controller which controls an amplitude of current to be supplied to heating resistors 52a, 52b and 52c in a head chip 28, thereby enabling ink droplets "i" to be discharged by changing a discharging angle in all directions of 360° at a nozzle 54a as a center. Thus, the apparatus can prevent the white streak along a feeding direction of a recording sheet or the density unevenness of a color from occurring. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To reduce line unevenness by performing a compensation according to each unit head, even when injection characteristics of ink droplets vary for each unit head and when arrangement precision of unit head fluctuates. SOLUTION: The liquid injection device is equipped with line head 10 where a plurality of (unit) heads 11 with arranged liquid injection parts are arranged side by side so that they are connected between heads 11. The device is equipped with an injection direction varying means and a criteria direction setting method. The injection direction varying means is variable in a plurality of directions in the arrangement direction of the liquid injection part. The criteria direction setting method individually sets up a main direction which is a criteria, among a plurality of injection direction of liquid droplets by the injection direction varying means for each head 11. In the (N-1)-th and (N+1)-th heads 11, the third injection direction from the left is set up to the main direction. In the N-th head 11, the second injection direction from the right is set up to the main direction. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To perform printing with a print resolution optimal for print data using a head which can deflect an ink drop from each ink ejecting part in a plurality of directions. SOLUTION: The printer is provided with heads (a plurality of heads 11) each juxtaposed with a plurality of ink ejecting parts N1, N2, N3 and capable of deflecting an ink drop being ejected from each ink ejecting part N1, or the like, in a plurality of directions in the juxtaposing direction of the ink ejecting parts N1, or the like. The printer determines a print resolution out of a plurality of printable print resolutions depending on print data, selects an ink ejecting part N1, or the like, for ejecting an ink drop based on the determined print resolution, determines the ejecting direction of an ink drop from each selected ink ejecting part N1, or the like, and transmits an ejection execution signal capable of specifying the ejecting direction to the selected ink ejecting part N1, or the like, thus executing printing with the print resolution out of a plurality of print resolutions determined depending on the print data. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To enhance the quality of a dot when one dot is formed of a plurality of liquid drops using a head capable of deflecting the ejecting direction of liquid drop by reducing shift in the shooting position of a plurality of liquid drops forming one dot. SOLUTION: A head 11 juxtaposed with a plurality of liquid ejecting parts is provided and ejecting direction of a liquid drop from each liquid ejecting part is deflected such that it can shoot at the shooting position of a liquid drop being ejected from another adjacent liquid ejecting part when it is not deflected. When one dot is formed by shooting a plurality of liquid drops to overlap the shooting area at least partially, operation is controlled such that one of two dots adjacent in the direction perpendicular to the arranging direction of the liquid ejecting parts is formed of a plurality of liquid drops ejected from one liquid ejecting part an the other dot is formed of a plurality of liquid drops ejected from a different liquid ejecting part. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To reduce variation in print results due to variation in ink jet heads. SOLUTION: In the imaging apparatus for imaging on a recording medium 21 by driving an ink jet head 1 having a print head 4 arranged with nozzle arrays ejecting ink of single color or inks of a plurality of colors, respectively, and ejecting ink liquid drops from the nozzles, the ink jet head 1 is provided with a means 30 for storing ink ejection characteristics information of the print head 4 or a corresponding color conversion table. An image processing means 31 reads out the ink ejection characteristics information or the corresponding color conversion table from the storage means 30 of the ink jet head 1, and converts RGB image data into image data for print depending on the ink ejection characteristics information of the print head 4 thus generating the driving signal of the ink jet head 1. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus and a method for photoprinting by which photoprinting efficiency can be remarkably improved. SOLUTION: In the apparatus and a method for photoprinting, a drive pulse for generation of the heating value is generated to control the pulse cycle of the drive pulse corresponding to the gradation of respective pixels which form images based on image information. While, the drive pulse is set to two or more pulse widths different to each other so as to be supplied to a recording head few times each continuously and alternately. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an electrophoretic display device which is improved in display performance by putting a technique including a dispersion system into microcapsules into practicability. SOLUTION: This electrophoretic device is constituted by inclosing the microcapsules including the dispersion media wlored by dyestuffs and the electrophoretic particles dispersed therein into a spacing between a transparent substrate and a counter substrate arranged to face the same and executes display action by the electrophoretic effect of the electrophoretic particles by the presence or absence of the voltage impression between the transparent substrate and the counter substrate. In such a case, the wall materials of the microcapsules are formed by including at least one kind among the fluorine compd, monomers expressed by the following formulas (1) to (7) as their components. In the formulas, R denotes a hydrogen atom or halogen atom or methyl group and (n) denotes an integer from 2 to 10.
Abstract:
PROBLEM TO BE SOLVED: To provide an electrophoretic display device which solves the problem accompanying a sp. gr. difference from dispersion media by lowering the sp. gr. of migration particles and is improved in reflectivity and a contrast ratio. SOLUTION: This electrophoretic device 10 is constituted by inclosing the dispersion media 13 colored by dyestuffs and the electrophoretic particles 14 dispersed therein into a spacing between a transparent substrate 11 and a counter substrate 12 arranged to face the same and executes display action by the electrophoretic effect of the electrophoretic particles 14 by the presence or absence of the voltage impression between the transparent substrate 11 and the counter substrate 12. The electrophoretic particles 14 are formed of a composite material obtd. by apparently combining a high-polymer resin material and a low-molecule resin material.