Patents by Inventor Osamu Iwasaki

Osamu Iwasaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120287193
    Abstract: A printing device using a print head ejecting ink from a plurality of nozzles to print ink dots of a plurality of dot diameters, includes a print-characteristic acquisition unit obtaining print characteristic information on dot diameters of ink dots to be printed per each predetermined portion of the plurality of nozzles, a distribution ratio determination unit determining a distribution ratio for distributing image data to the predetermined portions of the plurality of nozzles based on the information, a dot print position determination unit quantizing the image data to determine a dot print position based on the image data and sizes and an array of thresholds; and a plurality of masks based on dot distribution order determined according to the distribution ratio, distributing printing of each of the ink dots of the plurality of dot diameters to the dot print position determined by the dot print position determination unit.
    Type: Application
    Filed: April 27, 2012
    Publication date: November 15, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Fumiko Suzuki, Norihiro Kawatoko, Hitoshi Nishikori, Osamu Iwasaki, Atsuhiko Masuyama, Satoshi Masuda, Tomoki Yamamuro
  • Publication number: 20120287194
    Abstract: Adequate correction processing is performed on image data based on the degree of ink concentration that occurs even. An image processing apparatus having: acquisition unit for acquiring multi-value image data and a first parameter related to the degree of concentration of ink; first generation unit for generating corrected data by correcting the multi-value data that is to be printed for the first pixel based on the multi-value data that is to printed in the first pixel and a first parameter; and second generation unit for generating the first parameter and a second parameter that indicates the degree of ink concentration of the plurality of nozzles when printing a second pixel that is printed by the nozzles next to the first pixel.
    Type: Application
    Filed: April 30, 2012
    Publication date: November 15, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Satoshi Masuda, Tomoki Yamamuro, Hitoshi Nishikori, Osamu Iwasaki, Norihiro Kawatoko, Atsuhiko Masuyama, Fumiko Suzuki, Nobuhiro Kitabatake, Mitsuhiro Ono
  • Publication number: 20120287191
    Abstract: Provided are an inkjet printing apparatus and inkjet printing method that can, regardless of an ejection frequency of a print head, stabilize density of an image expressed on a print medium. For this purpose, an ink concentration integrated value is obtained according to the ejection history of each nozzle so as to be increased by data indicating non-ejection of the nozzle or decreased by data indicating ejection. Then, image data on the target pixel is corrected such that density of the target pixel is further reduced as the pixel is subjected to printing by a nozzle having a higher ink concentration integrated value.
    Type: Application
    Filed: April 30, 2012
    Publication date: November 15, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hitoshi Nishikori, Satoshi Masuda, Tomoki Yamamuro, Osamu Iwasaki, Norihiro Kawatoko, Atsuhiko Masuyama, Fumiko Suzuki
  • Publication number: 20120281166
    Abstract: To provide a light guide plate yielding a high light use efficiency and capable of emitting light with minimized unevenness in luminance and yielding a distribution such that the central area of the screen is brighter than the periphery, a light guide plate includes a rectangular light exit plane, and a light entrance plane for admitting light traveling substantially parallel to the light exit plane, a rear plane provided opposite from the light exit plane, and scattering particles dispersed inside, the light guide plate further including two or more layers lying on one another in a direction substantially perpendicular to the light exit plane and having different particle densities of scattering particles, the two or more layers including a first layer having a particle density of Npo and a second layer having a particle density of Npr and located closer to the rear plane than the first layer, Npo and Npr having a relation Npo<Npr, the cross section perpendicular to the light entrance plane having a conca
    Type: Application
    Filed: January 12, 2011
    Publication date: November 8, 2012
    Applicant: FUJIFILM CORPORATION
    Inventor: Osamu Iwasaki
  • Publication number: 20120274949
    Abstract: An ink jet printing apparatus comprises a distributing unit configured to distribute print data for printing dot into data used for printing by first printing elements provided in a print head and data used for printing by second printing elements provided in the same print head, and a determining unit configured to, for the data used for printing by the respective parts of the printing element arrays of each of first and second print heads which have the overlapped print regions, determine a ratio between amount of the data used for printing by a combination of the first and second printing element arrays in the first print head and a combination of the first and second printing element arrays in the second print head.
    Type: Application
    Filed: April 9, 2012
    Publication date: November 1, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Satoshi Masuda, Norhiro Kawatoko, Hitoshi Nishikori, Osamu Iwasaki, Tomoki Yamamuro, Atsuhiko Masuyama, Fumiko Suzuki
  • Publication number: 20120274951
    Abstract: A large and small dot distribution pattern is generated, for each chip, according to a large and small dot distribution ratio and ejection failure nozzle information. In doing so, a bias of large and small dot distribution ratio at a nozzle position including an ejection failure nozzle is set to be smaller than that at a nozzle position that does not including an ejection failure nozzle. Then, dot data to be printed by the ejection failure nozzle is equally distributed to large dot nozzles that can eject normally and small dot nozzles. By such a configuration, even if a plurality of printing chips have different printing characteristics, ejection failure compensation processing is performed to minimize image degradation caused by an unexpected ejection failure and an average ejection volume of each of the chips converge on a fixed target ejection volume, which leads to reduction of density unevenness among the chips.
    Type: Application
    Filed: April 12, 2012
    Publication date: November 1, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hitoshi Nishikori, Norihiro Kawatoko, Osamu Iwasaki, Tomoki Yamamuro, Atsuhiko Masuyama, Fumiko Suzuki, Satoshi Masuda
  • Patent number: 8267566
    Abstract: A planar lighting device comprises: a light guide plate including a concave rectangular light exit plane, two light entrance planes containing two opposite sides of the light exit plane and disposed opposite each other, two symmetrical inclined planes opposing to the light exit plane such that their distance from the light exit plane increases with the increasing distance from the two light entrance planes toward the center of the light exit plane, a curved portion connecting the two inclined planes; two light sources respectively disposed opposite the two light entrance planes for emitting light to enter the light into the light guide plate through the light entrance planes; and sliding mechanisms allowing the light sources to slide in a direction parallel to the light entrance planes of the light guide plate to absorb the expansion and contraction of the light sources along the length thereof.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: September 18, 2012
    Assignee: FUJIFILM Corporation
    Inventor: Osamu Iwasaki
  • Publication number: 20120206519
    Abstract: For a temperature adjustment process that uses high viscosity ink and is based on a first table, in a low temperature environment, an ink refill failure may occur and lower density may appear in high duty printing. Also for a temperature adjustment process that uses high viscosity ink and is based on second and third tables, in a low temperature environment, an ink refill failure may occur and lower density may appear. On the other hand, for a temperature adjustment process that employs a fourth table, a smaller pre-heat pulse width than that for the first table, for the conventional temperature adjustment, is employed in the same low temperature environment. Therefore, an ink refill failure does not occur, and horizontal or vertical gaps do not appear during high duty printing.
    Type: Application
    Filed: April 26, 2012
    Publication date: August 16, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kiyomi Aono, Osamu Iwasaki
  • Patent number: 8210731
    Abstract: The transparent light guide plate includes a rectangular light exit surface, a thick portion positioned at substantially a central portion of the surface, thin edge portions formed in parallel on both sides of the thick portion, a parallel groove accommodating a bar-like light source and being formed at substantially a center of the thick portion and inclined rear portions whose thickness is reduced from the thick portion toward the thin edge portions. An end portion of the groove is narrowed toward the surface symmetrically to a center line of the groove in a sectional shape thereof according to a ratio of a peak value of illuminance or luminance of emitted light at a first portion of the surface corresponding to the groove to an average value thereof at second portions corresponding to the inclined rear portions. The planar lighting device includes the light guide plate. The liquid crystal display device includes the planar lighting device.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: July 3, 2012
    Assignee: FUJIFILM Corporation
    Inventor: Osamu Iwasaki
  • Patent number: 8210637
    Abstract: The present invention provides an inkjet recording apparatus and a recording apparatus capable of reducing wear of a roller for application, even if liquid (for example, application liquid) is insufficient in a case where liquid is applied to recording media. In an embodiment of the present invention, in a case where it is determined that the application liquid is sufficient in a storage tank, the application liquid is filled in a liquid retention space, the application liquid is applied to the recording medium, and thus recording is performed. In a case where it is determined that the liquid application is insufficient in the storage tank, recording with application is prohibited.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: July 3, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsuhiko Masuyama, Osamu Iwasaki, Yoshinori Nakagawa, Naomi Oshio
  • Patent number: 8205982
    Abstract: The present invention provides a liquid application device, an inkjet recording apparatus and a recording apparatus, which are capable of performing an adequate application initial operation according to the length of waiting time and power-off time, as well as a method of controlling the liquid application device. In the present invention, information on an end time of the previous processing for collecting liquid is read from a nonvolatile memory, current time information indicating the current time is obtained, and information on a lapse of time from the end time of the previous collection to a start time of the current application. Thereafter, the number of preliminary rotations R of an application roller is decided based on the information on the lapse of time with reference to a look-up table. Sequentially, the application roller is rotated by the decided number of preliminary rotations R to perform preprocessing operation.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: June 26, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsuhiko Masuyama, Osamu Iwasaki, Yoshinori Nakagawa, Naomi Oshio, Naoji Otsuka, Hitoshi Sugimoto
  • Patent number: 8186789
    Abstract: For a temperature adjustment process that uses high viscosity ink and is based on a first table, in a low temperature environment, an ink refill failure may occur and lower density may appear in high duty printing. Also for a temperature adjustment process that uses high viscosity ink and is based on second and third tables, in a low temperature environment, an ink refill failure may occur and lower density may appear. On the other hand, for a temperature adjustment process that employs a fourth table, a smaller pre-heat pulse width than that for the first table, for the conventional temperature adjustment, is employed in the same low temperature environment. Therefore, an ink refill failure does not occur, and horizontal or vertical gaps do not appear during high duty printing.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: May 29, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kiyomi Aono, Osamu Iwasaki
  • Patent number: 8164789
    Abstract: In an image processing method, on the basis of input image data with respect to a target pixel, independent multi-level data (g0, g1) corresponding to respective plural species of dots which are different in at least one of a density and a diameter are generated, and then data (O0, O1) relating to an amount of generation of the dots with respect to the target pixel are generated on the basis of a relationship between the generated independent multi-level data (g0, g1) corresponding to the plural species of dots. The image processing method is effective in performing design having a high degree of flexibility in proper use of a relatively high power dot (high density dot or large dot) and a relatively low power dot (low density dot or small dot) and can realize obviation or alleviation of an occurrence of granulation or an apparent frame caused due to the relatively high power dot.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: April 24, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hitoshi Nishikori, Naoji Otsuka, Kiichiro Takahashi, Osamu Iwasaki, Minoru Teshigawara, Takeshi Yazawa, Toshiyuki Chikuma
  • Publication number: 20120062651
    Abstract: For a serial color ink jet printing apparatus that forms an image using a symmetric printing head that ejects large dots and small dots, the configuration of a printing head is provided for suppressing, to the extent possible, a cyclic fluctuation in the main scanning direction. According to the present invention, individual nozzle arrays are arranged so that two nozzle arrays, i.e., a cyan nozzle array c1 and a magenta nozzle array m1, that are located nearer each other, form dots on adjacent scan lines. With this arrangement, a high quality image, having neither an uneven density nor an uneven color, can be formed when a printing head is inclined, or when a cyclic shift in printing positions occurs, depending on the position of the main scanning direction.
    Type: Application
    Filed: November 18, 2011
    Publication date: March 15, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kiichiro TAKAHASHI, Naoji OTSUKA, Osamu IWASAKI, Minoru TESHIGAWARA, Tetsuya EDAMURA, Yoshinori NAKAGAWA, Satoshi SEKI, Naomi OSHIO
  • Patent number: 8132954
    Abstract: The planar lighting device includes a light guide plate having the light exit plane, two pairs of light entrance planes formed at the four sides of the light exit plane, and rear planes formed opposite to the light exit plane and inclined such that the light guide plate grows thicker toward the center thereof, a pair of main light sources and a pair of auxiliary light sources disposed opposite their respective light entrance planes to emit light to the respective light entrance planes, and illuminance distribution control unit to adjust the amount of light emitted by the main and auxiliary light sources to form a designated local illuminance distribution for any position desired in the light exit plane. The planar lighting device performs area control and line control to adjust illuminance at a light exit plane for any area desired and along any line desired, respectively.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: March 13, 2012
    Assignee: Fujifilm Corporation
    Inventor: Osamu Iwasaki
  • Patent number: 8087744
    Abstract: For a liquid applying mechanism of an ink jet printing apparatus, a liquid to be used for application to a medium is prevented from evaporating and leaking from a liquid holding member. An applying roller and the liquid holding member contact with each other to hold the liquid and apply the held liquid to a printing medium by way of the applying roller. In this configuration, the surface of the applying roller has no irregularities. Thereby, the applying roller can contact the liquid holding member to form an adequate liquid-tight seal therebetween.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: January 3, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yohinori Nakagawa, Naoji Otsuka, Osamu Iwasaki
  • Patent number: 8079665
    Abstract: For a serial color ink jet printing apparatus that forms an image using a symmetric printing head that ejects large dots and small dots, the configuration of a printing head is provided for suppressing, to the extent possible, a cyclic fluctuation in the main scanning direction. According to the present invention, individual nozzle arrays are arranged so that two nozzle arrays, i.e., a cyan nozzle array c1 and a magenta nozzle array m1, that are located nearer each other, form dots on adjacent scan lines. With this arrangement, a high quality image, having neither an uneven density nor an uneven color, can be formed when a printing head is inclined, or when a cyclic shift in printing positions occurs, depending on the position of the main scanning direction.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: December 20, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kiichiro Takahashi, Naoiji Otsuka, Osamu Iwasaki, Minoru Teshigawara, Tetsuya Edamura, Yoshinori Nakagawa, Satoshi Seki, Naomi Oshio
  • Publication number: 20110285787
    Abstract: In an ink jet printing apparatus using many types of inks to execute bidirectional printing, if ejection opening rows for yellow, magenta, and cyan inks are symmetrically arranged, ejection opening rows for a black ink are arranged adjacent to the most inside ejection opening rows for the yellow ink. Thus, a difference in color between forward scanning and backward scanning is determined by a difference in coloring between the black ink and the yellow ink. In this case, a possible color drift attributed to bidirectional printing can be suppressed by selecting the inks so that the difference in coloring between the black ink and the yellow ink is smaller than that between the black ink and the other color inks.
    Type: Application
    Filed: August 2, 2011
    Publication date: November 24, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: OSAMU IWASAKI, KIICHIRO TAKAHASHI, HITOSHI NISHIKORI, NAOJI OTSUKA, MINORU TESHIGAWARA, TETSUYA EDAMURA, YOSHINORI NAKAGAWA, SATOSHI SEKI
  • Publication number: 20110273907
    Abstract: A planar lighting device using a large and thin light guide plate and yet capable of yielding a high light use efficiency, emitting light with a minimized unevenness in luminance, and guiding the admitted light deep into the light guide plate to achieve a uniform or convex luminance distribution, i.e., a distribution curve that is high in a range near the middle of the screen as compared with the peripheral area of the screen. The light guide plate is provided on its rear side, or on the side thereof closer to the light exit plane, or on both sides in a given pattern with a distribution density changing continuously so as to once decrease with the increasing distance from the light entrance plane, and then increase with the increasing distance.
    Type: Application
    Filed: May 9, 2011
    Publication date: November 10, 2011
    Inventor: Osamu IWASAKI
  • Patent number: 8052315
    Abstract: It is an object to provide a planar illumination device that is thin and light weight, and can emit uniform illumination light with little brightness unevenness and can be enlarged in size.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: November 8, 2011
    Assignee: FUJIFILM Corporation
    Inventor: Osamu Iwasaki