Patents by Inventor Kazuma Arai

Kazuma Arai 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: 20090147154
    Abstract: An image display apparatus is disclosed in the present invention. The image display apparatus includes a light source emitting an illumination light of at least two colors comprising a first color and a second color, at least two spatial light modulators for receiving and applying an image signal for modulating the illumination light emitted from the light source; and a control circuit for controlling the light source and/or the spatial light modulators to emit the illumination lights of different colors for modulation by the SLM to generate different gray scale characteristics between lights of different colors.
    Type: Application
    Filed: December 5, 2008
    Publication date: June 11, 2009
    Inventors: Kazuma Arai, Taro Endo, Fusao Ishii
  • Patent number: 7545553
    Abstract: A display control system, comprises: a spatial light modulator (SLM) constituted by a plurality of pixel elements placed in array; a first control unit for controlling each of the plurality of pixel elements under a state of ON or OFF; a second control unit for controlling each of the plurality of pixel elements under a state other than the ON or OFF states; a control changeover unit for dividing one frame period, for each pixel element of the plurality thereof, into a period of the first control unit controlling and that of the second control unit controlling, and also changing over between a control of the first control unit and that of the second control unit for each pixel element of the plurality thereof; and a data division unit for dividing input data to each of the plurality of pixel elements into first control unit-use data, which is input to the first control unit, and second control unit-use data which is input to the second control unit in accordance with the content of the present input data.
    Type: Grant
    Filed: August 18, 2007
    Date of Patent: June 9, 2009
    Assignees: Silicon Quest Kabushiki-Kaisha, Olympus Corporation
    Inventors: Hirokazu Nishino, Kazuma Arai, Fusao Ishii, Yoshihiro Maeda, Taro Endo
  • Publication number: 20090135315
    Abstract: The present invention provides a display apparatus, comprising: a light source; at least one spatial light modulator for modulating a luminous flux emitted from the light source; and a controller for processing inputted video image information and for controlling the light source and spatial light modulator, wherein the controller controls the light source and spatial light modulator so that the light source performs pulse emission for a period shorter than a period in which the spatial light modulator is controlled under a modulation state.
    Type: Application
    Filed: October 1, 2008
    Publication date: May 28, 2009
    Inventors: Taro Endo, Kazuma Arai, Yoshihiro Maeda, Fusao Ishil
  • Publication number: 20090128464
    Abstract: The present invention provides a mirror array device, comprising: a plurality of mirror elements configured as two-dimensional array extending along a vertical direction and a horizontal direction on a device substrate. Each of the mirror elements further comprises an address electrode placed on the device substrate. A bit line is connected to for transmitting a first data signal to the address electrode. A first address decoder selects the address electrode. A word line for transmitting a first control signal from the first address decoder for selecting a first selected address electrode from the address electrodes. A second address decoder generates and transmits a second control signal through a plate line for selecting a second selected address electrode from the address electrodes.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Inventors: Naoya Sugimoto, Kazuma Arai, Yoshihiro Maeda, Fusao Ishii
  • Publication number: 20090128890
    Abstract: The present invention provides a spatial light modulator, comprising: a pixel array comprises a plurality of pixel units. Each of the pixel units comprises a memory cell. A plurality of word lines and a plurality of plate lines to electrically communicate with the pixel units. A plurality of bit line sets wherein each of the sets includes a pair of bit lines each connected to a memory cell, wherein at least one pair of the memory cells connected to the pair of bit lines are on a same row connected to a same word line.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Inventors: Naoya Sugimoto, Yoshihiro Maeda, Kazuma Arai, Fusao Ishii
  • Publication number: 20090128704
    Abstract: The present invention provides a display apparatus, comprising: a light source or light sources for emitting a luminous flux or luminous fluxes having a plurality of colors; a spatial light modulator for modulating the luminous flux(es) having a plurality of colors incoming from the light sources; and controller for processing video image input data, which is input, and controlling the light source(s) and the spatial light modulator, wherein the controller generates a plurality of video image signals of colors constituting a video image based on the video image input data, and controls the light source(s) so as to cause the light source(s) having at least two colors, from among the light source(s) having a plurality of colors, to perform pulse emission in sequence and modulate the pulse emission during a period shorter than a modulation period controlled under the spatial light modulator is with the video image signal of one color from among the video image signals.
    Type: Application
    Filed: October 1, 2008
    Publication date: May 21, 2009
    Inventors: Taro Endo, Kazuma Arai, Yoshihiro Maeda, Fusao Ishii
  • Publication number: 20090128463
    Abstract: The present invention discloses a spatial light modulator that includes a plurality of pixel units arranged as a pixel array. Each of the pixel units further comprises memory circuits. The spatial light modulator further includes a first data line for transmitting a first data signal to the memory circuits and a second data line for transmitting a second data signal to the memory circuits. The spatial light modulator further comprises a coupling circuit element for electrically coupling the memory circuits and second data line.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Inventors: Naoya Sugimoto, Kazuma Arai, Akira Shirai, Fusao Ishii, Yoshihiro Maeda
  • Publication number: 20090128465
    Abstract: The present invention provides a spatial light modulator, comprising: a plurality of pixel units configured as a two dimensional array extending in a vertical direction and a horizontal direction; a plurality of row lines each comprises a word line and a plate line connected to a plurality of the pixel units along a row in the horizontal direction; a first address decoder for selecting the word line; a second address decoder for selecting the plate line; and a level retention circuit interconnected between the plate line and second address decoder to retain a voltage level of the plate line.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Inventors: Naoya Sugimoto, Fusao Ishii, Kazuma Arai, Akira Shirai, Yoshihiro Maeda
  • Publication number: 20090128885
    Abstract: The present invention provides a spatial light modulator, comprising: a plurality of mirror elements; a plurality of address electrodes for controlling the movement of each of the mirror elements; and first and second control circuits for generating a voltage in the address electrode, wherein the second control circuit applies a voltage to the address electrode when the mirror element is in a moving state.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Inventors: Naoya Sugimoto, Kazuma Arai, Yoshihiro Maeda, Fusao Ishii
  • Publication number: 20090128884
    Abstract: The present invention provides a spatial light modulator, comprising: a plurality of row lines each connected to a plurality of memory circuits; and a plurality of word lines and a plurality of plate lines connected to the memory circuits for selecting and controlling sets of the memory circuits connected to the selected row lines at pre-designated times for each of the row lines.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Inventors: Naoya Sugimoto, Kazuma Arai, Akira Shirai, Fusao Ishii, Yoshihiro Maeda
  • Publication number: 20090128883
    Abstract: The present invention provides a display apparatus, comprising: a light source; at least one spatial light modulator for modulating a luminous flux emitted from the light source; and controller for processing video image information, which is input, and controlling the light source and the spatial light modulator, wherein the controller controls the light source and the spatial light modulator so as to perform pulse emission of the light source during a period shorter than a period in which the spatial light modulator is controlled under a modulation state and also controls the light source so as to modulate the pulse emission during a period shorter than a period in which the spatial light modulator is controlled under a modulation state.
    Type: Application
    Filed: October 1, 2008
    Publication date: May 21, 2009
    Inventors: Taro Endo, Kazuma Arai, Yoshihiro Maeda, Fusao Ishii
  • Publication number: 20090128887
    Abstract: The present invention provides a spatial light modulator, comprising: a pixel array comprising a plurality of pixel units. Each of the pixel units further comprises memory cell. A plurality of bit lines and a plurality of word lines for electrically communicating with the pixel units. A plurality of plate lines, wherein the plate line is connected to at least some of the memory cells connected to one of the word lines of the pixel array.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Inventors: Naoya Sugimoto, Yoshihiro Maeda, Kazuma Arai, Fusao Ishii
  • Publication number: 20090128462
    Abstract: The present invention provides a spatial light modulator, comprising: a pixel array includes a plurality of pixel units each having a memory. The spatial light modulator further includes bit lines for transmitting a first data signal and a second data signal to the memory of each of the pixel units and a word line connected to a memory for selecting the memory and setting the first or second data signal from the bit line. The spatial light modulator further includes a plate line for transmitting a third data signal, a fourth data signal to the pixel units, and setting a fifth data signal to have a voltage between a voltage of the third data signal and a voltage of the fourth data signal.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Inventors: Naoya Sugimoto, Yoshihiro Maeda, Kazuma Arai, Fusao Ishii
  • Publication number: 20090128588
    Abstract: An image display apparatus is disclosed in this invention. The image display apparatus includes a light source for emitting an illumination light, at least one spatial light modulator for receiving and applying an image signal for modulating illumination light from the light source, and a control circuit for controlling the light source and/or the spatial light modulator to project a modulated light for image display having different gray scale characteristics between at least two successive frames.
    Type: Application
    Filed: December 5, 2008
    Publication date: May 21, 2009
    Inventors: Kazuma Arai, Taro Endo, Fusao Ishii
  • Publication number: 20090102988
    Abstract: The present invention provides a projection device comprising a semiconductor light source comprises a plurality of sub light sources arranged in an array, an illumination optical system for guiding an illumination light emitted from the semiconductor light source, a spatial light modulator for receiving and applying an image signal for modulating the illumination light emitted from the semiconductor light source guided by said illumination optical system, a control circuit for controlling the semiconductor light source and the spatial light modulator and a projection optical system for projecting images by applying the illumination light modulated by the spatial light modulator.
    Type: Application
    Filed: October 1, 2008
    Publication date: April 23, 2009
    Inventors: Yoshihiro Maeda, Kazuma Arai, Taro Endo, Fusao Ishii
  • Publication number: 20090102828
    Abstract: A projection apparatus includes a light source for emitting a light including at least two different wavelengths; a light source control circuit for controlling a light source to emit the light as pulse emissions with a pulse modulation control; at least two spatial light modulators each comprises plurality of pixel elements are arranged in an array; a spatial light modulator control circuit for selectively controlling a modulation state of the respective pixel elements in each of the spatial light modulators in accordance with image data corresponding to the respective pixel elements; and the light source control circuit controls the light source so that a starting time of a pulse emission period of the pulse emissions of at least one of the wavelengths emitted from the light source is different from a modulation control timing of the pixel element of the spatial light modulator.
    Type: Application
    Filed: October 1, 2008
    Publication date: April 23, 2009
    Inventors: Kazuma Arai, Yoshihiro Maeda, Fusao Ishii
  • Publication number: 20090051712
    Abstract: A projection apparatus using a spatial light modulator (SLM), comprising the following: at least one variable light source, at least one spatial light modulator for modulating the illumination light emitted from the variable light source in accordance with the modulation state of arrayed pixel elements, a variable light source controller for controlling modulation of the variable light source, and a spatial light modulator controller for controlling modulation of each pixel element of the spatial light modulator, wherein the variable light source controller controls the variable light source so as to reduce the period in which the modulation states of the pixel element are in transition on a display image.
    Type: Application
    Filed: August 14, 2008
    Publication date: February 26, 2009
    Inventors: kazuma Arai, Fusao Ishii
  • Patent number: 7492378
    Abstract: An image display system includes a light source for projecting an illumination light. The image display system further includes a light source control unit that controls the light source to adjust the illumination intensity and/or light emission time of the illumination light. The display system further includes an SLM (Spatial Light Modulator) having a plurality of pixel elements. The SLM modulates the incident illumination light to generate gray scales. The light source control unit controls the light source during at least one time slice in one frame period, and the SLM uses that time slice to control a minimum adjustable gray scale.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: February 17, 2009
    Assignees: Silicon Quest Kabushiki-Kaisha, Olympus Corporation
    Inventors: Hirokazu Nishino, Yoshihiro Maeda, Kazuma Arai, Fusao Ishii
  • Publication number: 20080259008
    Abstract: A micromirror device, which makes an image display with digital image data, comprises pixel elements each of which makes pulse width modulation for incident light depending on the deflection state of light and which are arranged in the form of a matrix. Each of the pixel elements has a mirror, and at least one memory cell comprising a transistor and a capacitor. In such a micromirror device, the total value of the propagation delay time of a ROW line, which connects all of transistors of memory cells arranged successively in a ROW direction, and the switching time of each transistor is smaller than the driving interval of the ROW line driven in the minimum display duration of the micromirror device.
    Type: Application
    Filed: December 26, 2007
    Publication date: October 23, 2008
    Inventors: Kazuma Arai, Fusao Ishii, Yoshihiro Maeda
  • Publication number: 20080231936
    Abstract: A display system includes a spatial light modulator for displaying a image by the modulation state of a plurality of micromirrors, and a control device for controlling the spatial light modulator. The control device includes a data conversion device for converting the digital image data into non-binary data, and a modulation-control device for generating a modulation control signal for micromirrors depending on the non-binary data, and controlling the spatial light modulator. The modulation state of the micromirrors by the modulation control signal includes modulation by oscillation of the micromirrors. The modulation control signal controls amplitude of the oscillation to be smaller than the maximum amplitude of the micromirrors in the modulation by the oscillation of the micromirrors. The oscillation having smaller amplitude than the maximum amplitude of the micromirrors is repeated by the modulation control signal in an optional time duration or frequency.
    Type: Application
    Filed: March 1, 2008
    Publication date: September 25, 2008
    Inventors: Taro Endo, Yoshihiro Maeda, Kazuma Arai, Fusao Ishii