Patents by Inventor Katsuya Irie
Katsuya Irie 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).
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Patent number: 7642991Abstract: A method for driving an AC type plasma display panel includes the steps of performing initialization at least once for each frame so as to clear binary setting of wall charge quantity in a screen by discharge except for micro discharge in which electrodes covered with a plurality of fluorescent materials become cathodes, and performing special initialization at frequency of once for M frames, where M=two or more, so as to erase unnecessary wall charge in the screen by discharge in which electrodes become cathodes and that is stronger than the discharge in the initialization.Type: GrantFiled: June 18, 2004Date of Patent: January 5, 2010Assignee: Hitachi Plasma Patent Licensing Co., Inc.Inventors: Yasunobu Hashimoto, Tadayoshi Kosaka, Yoshiho Seo, Naoki Itokawa, Hajime Inoue, Kazushige Takagi, Katsuya Irie
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Publication number: 20090046086Abstract: A method for driving an AC type plasma display panel includes the steps of performing initialization at least once for each frame so as to clear binary setting of wall charge quantity in a screen by discharge except for micro discharge in which electrodes covered with a plurality of fluorescent materials become cathodes, and performing special initialization at frequency of once for M frames, where M=two or more, so as to erase unnecessary wall charge in the screen by discharge in which electrodes become cathodes and that is stronger than the discharge in the initialization.Type: ApplicationFiled: September 30, 2008Publication date: February 19, 2009Applicant: HITACHI, LTD.Inventors: Yasunobu Hashimoto, Tadayoshi Kosaka, Yoshiho Seo, Naoki Itokawa, Hajime Inoue, Kazushige Takagi, Katsuya Irie
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Publication number: 20090040211Abstract: A method for driving an AC type plasma display panel includes the steps of performing initialization at least once for each frame so as to clear binary setting of wall charge quantity in a screen by discharge except for micro discharge in which electrodes covered with a plurality of fluorescent materials become cathodes, and performing special initialization at frequency of once for M frames, where M=two or more, so as to erase unnecessary wall charge in the screen by discharge in which electrodes become cathodes and that is stronger than the discharge in the initialization.Type: ApplicationFiled: September 30, 2008Publication date: February 12, 2009Applicant: HITACHI, LTD.Inventors: Yasunobu Hashimoto, Tadayoshi Kosaka, Yoshiho Seo, Naoki Itokawa, Hajime Inoue, Kazushige Takagi, Katsuya Irie
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Publication number: 20070210987Abstract: The present invention relates to an image display device that includes a display screen where subpixels emitting colored light of each color are arranged cyclically so as to repeat every predetermined display pixel pitch at least in a predetermined rotation arrangement direction and displays images on the display screen. The image display device displays images based on image data having a resolution higher than a resolution determined by the display pixel pitch after minimizing color differences from colors expressed by the image data. A weighting operation is performed which corresponds to a state where each data point is arranged not to overlap with the center of each subpixel to calculate data corresponding to each subpixel.Type: ApplicationFiled: July 30, 2004Publication date: September 13, 2007Inventors: Yasunobu Hashimoto, Yoshito Seo, Katsuya Irie, Kenji Awamoto
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Image display apparatus having delta arrangement type screen and image conversion method for display
Patent number: 7248234Abstract: In order to reduce aliasing as much as possible in a display apparatus that has a delta arrangement type screen, an image filter for performing a neighborhood operation is incorporated as a previous stage of a screen driving circuit. The image filter realizes low pass filtering including space frequency limitation in the diagonal direction that is suitable for a display on the delta arrangement type screen. Coefficients that constitute the filter matrix are optimized so that frequency components that exceed a Nyquist limit in the delta arrangement are suppressed. Coefficients that give optimal filter characteristics for any scale of filter matrix are defined by an expression.Type: GrantFiled: April 1, 2004Date of Patent: July 24, 2007Assignee: Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Yasunobu Hashimoto, Katsuya Irie, Kenji Awamoto -
Publication number: 20070152587Abstract: A gas discharge display device for displaying a color image by means of red, green and blue fluorescent substances, wherein a color to be reproduced by light-emission of the red, green and blue fluorescent substances for displaying a white pixel is set to be different from a white color intended for display, and a filter is disposed on a front side of the red, green and blue fluorescent substances for approximating a display color of the white pixel to the white color intended for display.Type: ApplicationFiled: March 12, 2007Publication date: July 5, 2007Applicant: Fujitsu LimitedInventors: Katsuya Irie, Fumihiro Namiki
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Patent number: 7211952Abstract: A gas discharge display device for displaying a color image by means of red, green and blue fluorescent substances, wherein a color to be reproduced by light-emission of the red, green and blue fluorescent substances for displaying a white pixel is set to be different from a white color intended for display, and a filter is disposed on a front side of the red, green and blue fluorescent substances for approximating a display color of the white pixel to the white color intended for display.Type: GrantFiled: September 14, 2004Date of Patent: May 1, 2007Assignee: Fujitsu LimitedInventors: Katsuya Irie, Fumihiro Namiki
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Patent number: 7126562Abstract: The present invention is characterized in that the PDP drive means makes correction so as to decrease the emission intensity of green or to increase the emission intensity of blue as the display load factor increases compared with the case when the display load factor is lower. Or, the PDP drive means makes correction so as to increase the emission intensity of green or to decrease the emission intensity of blue as the display load factor decreases compared with the case when the display load factor is higher. Such a correction is effective when the monochromatic emission luminance of the fluorescent substance has such a saturation characteristic that the decrease in green is greater than blue as the emission frequency increases. Therefore, when the saturation characteristic is the opposite in terms of the relationship between green and blue, the increase/decrease of the emission intensity in the above correction must be the opposite.Type: GrantFiled: June 14, 2000Date of Patent: October 24, 2006Assignee: Hitachi, Ltd.Inventors: Katsuya Irie, Fumihiro Namiki
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Patent number: 7071621Abstract: A plasma display panel is provided in which color temperature of the displayed color can be optimized while securing the gradation reproducibility and the stability of driving. The plasma display panel includes a screen in which a plurality of cells arranged in rows and columns emits light by electric discharge between a pair of main electrodes, and each pixel of matrix display has first, second and third cells having different light colors. At least one of the effective area of the main electrode, the thickness of the dielectric layer, the relative dielectric constant of the dielectric material, and the area of the light shield for the first cell is different from that of the second cell.Type: GrantFiled: December 13, 1999Date of Patent: July 4, 2006Assignee: Fujitsu LimitedInventors: Fumihiro Namiki, Katsuya Irie, Tadayoshi Kosaka, Kazushige Takagi, Takashi Shiizaki, Hitoshi Hirakawa, Takashi Katayama
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Patent number: 7050075Abstract: A data conversion circuit is provided for displaying a high definition image whose resolution is different from that of a display screen having a cell arrangement that is not a square arrangement. The data conversion circuit performs addition operation with weighting that is also resolution conversion of the integer ratio M:N and data correction for improving a linear display quality for input image data.Type: GrantFiled: January 21, 2003Date of Patent: May 23, 2006Assignee: Fujitsu LimitedInventors: Kenji Awamoto, Katsuya Irie, Kunio Takayama, Yasunobu Hashimoto
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Publication number: 20050156821Abstract: A method for driving an AC type plasma display panel includes the steps of performing initialization at least once for each frame so as to clear binary setting of wall charge quantity in a screen by discharge except for micro discharge in which electrodes covered with a plurality of fluorescent materials become cathodes, and performing special initialization at frequency of once for M frames, where M=two or more, so as to erase unnecessary wall charge in the screen by discharge in which electrodes become cathodes and that is stronger than the discharge in the initialization.Type: ApplicationFiled: June 18, 2004Publication date: July 21, 2005Applicant: FUJITSU LIMITEDInventors: Yasunobu Hashimoto, Tadayoshi Kosaka, Yoshiho Seo, Naoki Itokawa, Hajime Inoue, Kazushige Takagi, Katsuya Irie
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Patent number: 6909225Abstract: A gas discharge display device is provided in which an influence of light emission of a discharge gas is reduced so that color reproducibility is improved. The gas discharge display device reproduces a color of each pixel of a color image by controlling light emission quantities of three kinds of cells having different light emission colors. The mixed color of the light emission colors of the three kinds of cells when reproducing a white color is set to a color defined by chromaticity coordinates in which a deviation from a blackbody locus is generated in a chromaticity diagram. A filter is disposed at the front side of the three kinds of cells. The filter has spectral characteristics of converting the mixed color to a color having a higher color temperature and defined by chromaticity coordinates point that is close to the blackbody locus.Type: GrantFiled: November 28, 2000Date of Patent: June 21, 2005Assignee: Fujitsu LimitedInventors: Katsuya Irie, Fumihiro Namiki
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Patent number: 6897835Abstract: A method for displaying a color image is provided in which a predetermined display quality is secured regardless of a type of an input image, and display quality of an image having a linear edge is improved. The method comprises the steps of using a display device having a cell arrangement structure in which cells of each cell column in a display screen have the same light color, a light color of a cell column is different from that of the neighboring cell column, and a cell position in the column direction of a cell column is shifted from that of the neighboring cell column among a set of the cell columns each having the same light color, and lighting two neighboring cells in at least one cell column out of a set of cell columns each having the same light color when displaying a display line perpendicular to the column direction.Type: GrantFiled: November 19, 2001Date of Patent: May 24, 2005Assignee: Fujitsu LimitedInventors: Katsuya Irie, Kenji Awamoto
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Patent number: 6888310Abstract: A plasma display panel includes a dielectric layer in which a filler for enhancing reflectance is dispersed. To increase luminescence efficiency, the filler consists of flakes oriented in parallel to the surface of the dielectric layer.Type: GrantFiled: March 28, 2001Date of Patent: May 3, 2005Assignee: Fujitsu LimitedInventors: Shinji Tadaki, Noriyuki Awaji, Fumihiro Namiki, Katsuya Irie, Hideki Harada, Tadayoshi Kosaka
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Patent number: 6888301Abstract: A gas-discharge display apparatus is provided that reduces influence of light emission of the discharging gas so as to enhance a color reproducible range and make color purity of red color close to the ideal value. The apparatus uses a gas containing at least one of neon and helium for generating the gas discharge and exciting three kinds of fluorescent materials having different light colors to emit light for color image display. In front of the gas discharge space, an optical filter is disposed, whose transmittance at the wavelength of 585 nanometers is smaller than both the transmittance at the wavelength of 450 nanometers and the transmittance at the wavelength of 620 nanometers.Type: GrantFiled: December 28, 1999Date of Patent: May 3, 2005Assignee: Fijitsu LimitedInventors: Fumihiro Namiki, Katsuya Irie
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Publication number: 20050029943Abstract: A gas discharge display device for displaying a color image by means of red, green and blue fluorescent substances, wherein a color to be reproduced by light-emission of the red, green and blue fluorescent substances for displaying a white pixel is set to be different from a white color intended for display, and a filter is disposed on a front side of the red, green and blue fluorescent substances for approximating a display color of the white pixel to the white color intended for display.Type: ApplicationFiled: September 14, 2004Publication date: February 10, 2005Applicant: Fujitsu LimitedInventors: Katsuya Irie, Fumihiro Namiki
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Patent number: 6853125Abstract: A gas discharge display device for displaying a color image by means of red, green and blue fluorescent substances, wherein a color to be reproduced by light-emission of the red, green and blue fluorescent substances for displaying a white pixel is set to be different from a white color intended for display, and a filter is disposed on a front side of the red, green and blue fluorescent substances for approximating a display color of the white pixel to the white color intended for display.Type: GrantFiled: January 21, 1999Date of Patent: February 8, 2005Assignee: Fujitsu LimitedInventors: Katsuya Irie, Fumihiro Namiki
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Image display apparatus having delta arrangement type screen and image conversion method for display
Publication number: 20040233185Abstract: In order to reduce aliasing as much as possible in a display apparatus that has a delta arrangement type screen, an image filter for performing a neighborhood operation is incorporated as a previous stage of a screen driving circuit. The image filter realizes low pass filtering including space frequency limitation in the diagonal direction that is suitable for a display on the delta arrangement type screen. Coefficients that constitute the filter matrix are optimized so that frequency components that exceed a Nyquist limit in the delta arrangement are suppressed. Coefficients that give optimal filter characteristics for any scale of filter matrix are defined by an expression.Type: ApplicationFiled: April 1, 2004Publication date: November 25, 2004Applicant: Fujitsu LimitedInventors: Yasunobu Hashimoto, Katsuya Irie, Kenji Awamoto -
Patent number: 6768485Abstract: An image display device is provided, which can secure a predetermined display quality regardless of a type of an input image. The color image display device comprises a display device having a delta arrangement screen, a driving circuit, an image decision circuit for deciding which of plural predetermined types an input image is, a memory circuit for memorizing temporarily at least a part of input image data for one frame, an operation circuit for performing an operation process having preset contents in accordance with image data for plural pixels including image data read out of the memory circuit, and an operation control circuit for switching the contents of the operation process in the operation circuit in response to the output of the image decision circuit.Type: GrantFiled: February 20, 2002Date of Patent: July 27, 2004Assignee: Fujitsu LimitedInventors: Kenji Awamoto, Katsuya Irie, Kunio Takayama
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Publication number: 20030174151Abstract: A data conversion circuit is provided for displaying a high definition image whose resolution is different from that of a display screen having a cell arrangement that is not a square arrangement. The data conversion circuit performs addition operation with weighting that is also resolution conversion of the integer ratio M:N and data correction for improving a linear display quality for input image data.Type: ApplicationFiled: January 21, 2003Publication date: September 18, 2003Applicant: FUJITSU LIMITEDInventors: Kenji Awamoto, Katsuya Irie, Kunio Takayama, Yasunobu Hashimoto