Patents by Inventor Tsutomu Sakamoto

Tsutomu Sakamoto 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: 20050134534
    Abstract: A flat-panel display device includes scan lines, signal lines, pixels arrayed at intersections of the scan lines and signal lines and having a surface-conduction electron-emitter, a video processing circuit, a scan line driver, and a signal line driver. The video processing circuit includes a video analysis unit that divides a video signal for one horizontal line into a predetermined number of blocks and obtains average levels of the video signal blocks, a correction coefficient calculation unit that determines correction coefficients for the blocks, which match with voltage drops due to wiring resistance of the scan lines, on the basis of the average levels of the video signal blocks that are obtained by the video analysis unit, and a video signal correction unit that multiplies each video signal block by the associated correction coefficient determined by the correction coefficient calculation unit.
    Type: Application
    Filed: February 4, 2005
    Publication date: June 23, 2005
    Inventors: Satoshi Yamada, Tsutomu Sakamoto
  • Patent number: 6882329
    Abstract: A drive signal generation circuit which performs gradation control on a load by a drive signal having a stepped waveform. In a case where the wave height value corresponding to input gradation data is Vm (2?m?n), the drive signal is caused to rise in such a manner that each output Vk (2?k?m) is produced one slot after the output V(k?1) to increase the wave height value V0 (reference potential) to Vm in a stepping manner. One slot corresponds to a unit time of the pulse width modulation. The drive signal is caused to fall in such a manner that each output V(k?1) (1?k?m?1) is produced one or two slots after the output Vk to reduce the wave height value from Vm to off level in a stepping manner. A delay circuit is used to delay signals slot by slot. A selection is made from delayed signals according to luminance data to determine a waveform. The circuit is also designed to enable the drive signal waveform rise position to be changed.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: April 19, 2005
    Assignees: Canon Kabushiki Kaisha, Kabushiki Kaisha Toshiba
    Inventors: Aoji Isono, Tadashi Aoki, Kazuhiko Murayama, Kenji Shino, Tsutomu Sakamoto
  • Publication number: 20050020116
    Abstract: There is provided a connector used for connecting a plurality of first terminals formed on a first electronic part to a plurality of respective second terminals formed on a second electronic part. The connector comprises an intermediate basis material having a spring characteristic, a plurality of first electrically conductive members provided on a first surface of the intermediate basis material, a plurality of second electrically conductive members provided on a second surface of the intermediate basis material, and wiring for connecting each of the first electrically conductive members to corresponding one of the second electrically conductive members.
    Type: Application
    Filed: December 22, 2003
    Publication date: January 27, 2005
    Inventors: Katsuro Kawazoe, Takayuki Uda, Kouichi Yamamoto, Tsutomu Sakamoto, Maria Katsuki
  • Patent number: 6795105
    Abstract: A laser printing apparatus is formed by a laser oscillator 10, galvano mirrors 42, 44 for scanning the laser light emitted from the laser oscillator 10, and an f&thgr; lens 40 for focusing the laser light emitted from the laser oscillator 10 on MCCs 32, 34 serving as the member to be printed. The laser oscillator 10 is an YLF laser oscillator which emits the laser light of the third harmonics in the ultraviolet range. The laser printing is performed on the MCCs 32, 34 serving as the member to be printed by using the laser light emitted from the laser oscillator 10.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: September 21, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Kaoru Katayama, Kenichi Inoue, Mitsugu Shirai, Tsutomu Sakamoto
  • Publication number: 20030063108
    Abstract: A drive signal generation circuit which performs gradation control on a load by a drive signal having a stepped waveform. In a case where the wave height value corresponding to input gradation data is Vm (2≦m≦n), the drive signal is caused to rise in such a manner that each output Vk (2≦k≦m) is produced one slot after the output V(k−1) to increase the wave height value V0 (reference potential) to Vm in a stepping manner. One slot corresponds to a unit time of the pulse width modulation. The drive signal is caused to fall in such a manner that each output V(k−1) (1≦k≦m−1) is produced one or two slots after the output Vk to reduce the wave height value from Vm to off level in a stepping manner. A delay circuit is used to delay signals slot by slot. A selection is made from delayed signals according to luminance data to determine a waveform. The circuit is also designed to enable the drive signal waveform rise position to be changed.
    Type: Application
    Filed: September 27, 2002
    Publication date: April 3, 2003
    Inventors: Aoji Isono, Tadashi Aoki, Kazuhiko Murayama, Kenji Shino, Tsutomu Sakamoto
  • Patent number: 6515647
    Abstract: A matrix display apparatus having a display panel device provided with a plurality of data-lines, a plurality of scan-lines which are arranged in a matrix and a controller for controlling the display panel device, wherein the controller generates a write instruction signal (i) for instructing the (a×n+b)-th scanning line image signal of the first field image signal to be written on adjoining two scan-lines (a and b are constants, a>b, n is a zero or a positive integer), (ii) for instructing the other scanning line image signals of the first field image signal to be written on one of the scan-lines, (iii) for instructing the (a×n+c)-th scanning line image signal of the second field image signal to be written on adjoining two scan-lines (c is a constant, a>c) and (iv) for instructing the other scanning line image signals of the second field image signal to be written on one of the scan-lines.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: February 4, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tsutomu Sakamoto
  • Publication number: 20020196267
    Abstract: An image display device includes a display section in which (m×n) display pixels are arrayed in a matrix form and located at intersections of m row wirings and n column wirings, a length L of the row being greater or equal to a length K of the column. Particularly, the display device further includes a scanning driver which sequentially selects the column wirings, and a driving circuit which supplies a drive signal to each of the row wirings based on a video signal synchronously with selection made by the scanning driver.
    Type: Application
    Filed: June 20, 2002
    Publication date: December 26, 2002
    Inventors: Toshio Obayashi, Tsutomu Sakamoto
  • Patent number: 6433810
    Abstract: A laser printing apparatus is formed by a laser oscillator 10, galvano mirrors 42, 44 for scanning the laser light emitted from the laser oscillator 10, and an f&thgr; lens 40 for focusing the laser light emitted from the laser oscillator 10 on MCCs 32, 34 serving as the member to be printed. The laser oscillator 10 is an YLF laser oscillator which emits the laser light of the third harmonics in the ultraviolet range. The laser printing is performed on the MCCs 32, 34 serving as the member to be printed by using the laser light emitted from the laser oscillator 10.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: August 13, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Kaoru Katayama, Kenichi Inoue, Mitsugu Shirai, Tsutomu Sakamoto
  • Publication number: 20020093562
    Abstract: A laser printing apparatus is formed by a laser oscillator 10, galvano mirrors 42, 44 for scanning the laser light emitted from the laser oscillator 10, and an f&thgr; lens 40 for focusing the laser light emitted from the laser oscillator 10 on MCCs 32, 34 serving as the member to be printed. The laser oscillator 10 is an YLF laser oscillator which emits the laser light of the third harmonics in the ultraviolet range. The laser printing is performed on the MCCs 32, 34 serving as the member to be printed by using the laser light emitted from the laser oscillator 10.
    Type: Application
    Filed: March 13, 2002
    Publication date: July 18, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Kaoru Katayama, Kenichi Inoue, Mitsugu Shirai, Tsutomu Sakamoto
  • Publication number: 20020032679
    Abstract: When the user enters a problem, data of the problem is sent to a server, which searches a case database or a meta database concerning solutions. This meta database has database including actual examples of solution collected according to each of rules into which the solutions to the past problems are classified, which past problems are considered as opposed concepts of physical or chemical laws. Since this meta database is based on, for example, laws of nature extracted from problems, it is possible to propose such a solution as to be rarely used or not to have been used so far depending on the field.
    Type: Application
    Filed: August 8, 2001
    Publication date: March 14, 2002
    Inventors: Yasuo Hira, Masaaki Sato, Motomi Odamura, Tsutomu Sakamoto, Sakee Nemoto, Teruo Kumagai
  • Patent number: 6335828
    Abstract: A micro-lens array sheet having a wide field angle, a field angle control, a high light efficiency, a high brightness and a high contrast, which is provided with a layer of micro-lenses each shaped to be a centro-symmetry convex or concave micro-lens. A layer of either a light diffusion sheet or a sheet filled with light diffusive agent is attached on a light transmitting side of the micro-lens array sheet. The micro-lenses are aligned in a diamond grid array or an array including a combination of diamond-shape and hexagonal-shape micro-lens blocks.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: January 1, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takahiro Hashimoto, Tsutomu Sakamoto
  • Patent number: 6112302
    Abstract: A device for setting initializing data for every destination in an electronic device has a microcomputer for controlling the electronic device and an external memory connected to the microcomputer.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: August 29, 2000
    Assignee: Funai Electric Co., Ltd.
    Inventors: Noriyuki Fujii, Tsutomu Sakamoto
  • Patent number: 6094133
    Abstract: To discriminate counterfeit articles by incorporating invisible ID information recording apparatus in the true articles. An LC resonance tag 1 is buried in the articles 21 and 22 at the time when they are being produced in compliance with the contraction of a license. Upon bringing transmission and reception antenna units 15, 16 of a reflected wave analyzer 11 close to the articles, the resonance frequencies of the LC resonance tags 1 are specified, and voice messages such as brand, name of article, explanation of article, etc. are produced from a speaker of the reflected wave analyzer 11 based on the display data related to the resonance frequencies, verifying that the articles are true ones.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: July 25, 2000
    Assignee: Sensor Technos Co., Ltd.
    Inventors: Chikara Shimamura, Tsutomu Sakamoto
  • Patent number: 5835029
    Abstract: NTSC convergence adjusting data corresponding to a plurality of portions on a display screen is stored in a data storage section in advance. Convergence adjusting data is stored in a field memory in a NTSC scanning mode. Adjusting data transferred to the memory is supplied to a vertical interpolation circuit, and interpolation adjusting data between the adjusting points is created using the plurality of adjusting data and interpolation coefficients. Data output from the vertical interpolation circuit is A/D-converted, and supplied to a deflection coil through a low pass filter as a convergence correction signal. In a PAL scanning mode, PAL convergence adjusting data is created with use of NTSC convergence adjusting data by a control microcomputer so as to be stored in the frame memory.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: November 10, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masanori Fujiwara, Tsutomu Sakamoto, Yoshiji Tsuzuki, Hisayuki Mihara, Toshio Obayashi
  • Patent number: 5793447
    Abstract: A field memory stores convergence adjusting data which corresponds to a plurality of points on a display screen. An interpolation calculation circuit creates interpolation convergence adjusting data for correction points located between adjacent adjusting points, using a plurality of adjusting data items and interpolation coefficients. The output of the interpolation calculation circuit is subjected to digital/analog conversion and passed through a low-pass filter, thereby forming a convergence correction signal. This correction signal is supplied to each deflection coil. At the time of creating interpolation adjusting data for a point located between adjusting points, an optimal interpolation coefficient is output from a ROM or a ROM, depending upon whether the point is included in the odd or even field.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: August 11, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masanori Fujiwara, Tsutomu Sakamoto, Yoshiji Tsuzuki, Hisayuki Mihara, Toshio Obayashi
  • Patent number: 5745093
    Abstract: A liquid crystal display system includes a liquid crystal display having liquid crystal pixel elements arranged in a matrix; data lines for driving pixel columns and scanning signal lines for driving pixel rows. The system has a circuit for supplying video signal to pixels through data lines and a scanning signal line controller for supplying a progressive scanning signal to the scanning signal lines. The data lines are driven by four sample-hold circuits. The first sample-hold circuit samples and holds video signals for pixels corresponding to odd rows on a first side of the screen and supplies them to data lines corresponding to the first side on the screen based on a first output directing signal. A second sample-hold circuit samples and holds video signals for pixels corresponding to even rows on the first side of the screen and supplies them to data lines corresponding to the first side on the screen based on a second output directing signal.
    Type: Grant
    Filed: May 27, 1993
    Date of Patent: April 28, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshiji Tsuzuki, Tsutomu Sakamoto
  • Patent number: 5597223
    Abstract: A display apparatus includes a light source, a modulating device for modulating light emitted from the light source, a modulating device driving unit for driving the modulating device, a first aperture stop unit arranged between the light source and the modulating device to limit a bundle of rays to be incident on the modulating device from the light source, the first aperture stop unit having an aperture with a variable size, a display screen onto which exit light from the modulating device is projected, a projection optical system for projecting the exit light from the modulating device onto the display screen, a second aperture stop unit arranged between the modulating device and the projection optical system to limit a bundle of rays to be incident on the projection optical system from the modulating device, the second aperture stop unit having an aperture with a variable size, a photosensor for detecting the display luminance on the display screen, and an aperture control unit for controlling the size of
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: January 28, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiro Watanabe, Hiroki Nakamura, Nozomu Harada, Seiji Murakami, Tsutomu Sakamoto, Kazuki Taira, Yutaka Saitoh
  • Patent number: 5592240
    Abstract: A digital convergence apparatus using two different kinds of data to correct the convergence of odd and even scanning lines, respectively. A first memory stores data for the convergence correction corresponding to plural correction executing points aligned in the horizontal or vertical direction of a screen. A first static convergence data memory stores a first static convergence correction data for correcting the entire screen in the same direction, a second static convergence data memory stores a second static convergence correction data different from the first static convergence correction data only by an amount corresponding to the distance between the scanning lines. Selecting means select the output of the first or the second static convergence data memory according to the odd field period or the even field period. Adding means add the output of the selecting means to the data stored in the first memory.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: January 7, 1997
    Assignee: Kabushiki Kaisha Roshiba
    Inventors: Tsutomu Sakamoto, Masanori Fujiwara, Yoshiji Tsuzuki, Hisayuki Mihara
  • Patent number: 5519518
    Abstract: A display apparatus includes a light source, a modulating device for modulating light emitted from the light source, a modulating device driving unit for driving the modulating device, a first aperture stop unit arranged between the light source and the modulating device to limit a bundle of rays to be incident on the modulating device from the light source, the first aperture stop unit having an aperture with a variable size, a display screen onto which exit light from the modulating device is projected, a projection optical system for projecting the exit light from the modulating device onto the display screen, a second aperture stop unit arranged between the modulating device and the projection optical system to limit a bundle of rays to be incident on the projection optical system from the modulating device, the second aperture stop unit having an aperture with a variable size, a photosensor for detecting the display luminance on the display screen, and an aperture control unit for controlling the size of
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 21, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiro Watanabe, Hiroki Nakamura, Nozomu Harada, Seiji Murakami, Tsutomu Sakamoto, Kazuki Taira, Yutaka Saitoh
  • Patent number: 4701864
    Abstract: A memory control apparatus for a CRT controller in which the same data from a data input circuit is loaded into a plurality of addresses of a buffer memory for storing drawing data, the address of the buffer memory being automatically updated. X- and Y- address generators update address data in response to pulses from X- and Y-axis pulse generators. A microprocessor supplies to a register the width of the X and Y thickness of an address to be updated, coordinate data representing a write start point to the address generators, and the drawing data to be written to a data input circuit. The memory can then be updated in units specified by the X and Y thickness of the picture element.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: October 20, 1987
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shigekazu Takashima, Tsutomu Sakamoto