Patents by Inventor Masato Nishizawa

Masato Nishizawa 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: 20230005240
    Abstract: This application provides an image sensor (702) and image light sensing method. The image sensor (702) includes a red pixel (R), a green pixel (G), a blue pixel (B), and an invisible light pixel, where the red pixel (R), the green pixel (G), and the blue pixel (B) are large pixels, the invisible light pixel is a small pixel, and a light sensing area of the large pixel is greater than that of the small pixel. The red pixel (R), the green pixel (G), and the blue pixel (B) are arranged in a Bayer format. In this application, when color information is sufficient, light crosstalk caused by the small pixel to the large pixel can be reduced, and therefore a signal-to-noise ratio of the large pixel can be improved.
    Type: Application
    Filed: September 2, 2022
    Publication date: January 5, 2023
    Inventors: Jianpei CHEN, Jing LAN, Cong XU, Jiacheng GUO, Masato NISHIZAWA
  • Patent number: 10423666
    Abstract: A semiconductor device that writes, into respective memory spaces of a plurality of separate memories constituting a search memory mat, an entry address corresponding to key data to be written. In this semiconductor device, pieces of divided data are assigned respectively to the separate memories, and, by employing each divided data as an address, entry addresses corresponding to the divided data are written sequentially into memory spaces specified by memory addresses of the separate memories (first writing process). In this first writing process, if another entry address is already written in an accessed memory space, no entry address is written into that memory space. If an entry address corresponding to a single one of the plurality of pieces of divided data is successfully written into a memory space, the first writing process is ended. Second write processing to a verification memory may also be performed. Key data may be written to a backup memory when a whole collision occurs.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: September 24, 2019
    Assignee: NAGASE & CO., LTD.
    Inventors: Masato Nishizawa, Kaoru Kobayashi, Kanji Otsuka, Yoichi Sato, Toshiyuki Kouchi, Minoru Uwai
  • Publication number: 20180129756
    Abstract: Disclosed is a semiconductor device that writes, into respective memory spaces of a plurality of divisional memories constituting a search memory mat, an entry address corresponding to key data to be written. In this semiconductor device, pieces of divisional data are assigned respectively to the divisional memories, and, by employing each divisional data as an address, an entry address corresponding to said divisional data is written sequentially into a memory space specified by a memory address of each said divisional memory (first writing process). In this first writing process, if another entry address is already written in an accessed memory space, no entry address is written into that memory space. If an entry address corresponding to one of the plurality of pieces of divisional data is successfully written into a memory space, the first writing process is ended.
    Type: Application
    Filed: April 18, 2016
    Publication date: May 10, 2018
    Applicant: NAGASE & CO., LTD.
    Inventors: Masato NISHIZAWA, Kaoru KOBAYASHI, Kanji OTSUKA, Yoichi SATO, Toshiyuki KOUCHI, Minoru UWAI
  • Patent number: 9123301
    Abstract: An electro-optical device includes: a display section that has a plurality of pixels; a control value acquisition section that acquires an initial value of a control value c which is used when an image is displayed on the display section; a calculation section that decreases the control value c whenever the image of the display section is rewritten; and a control section that selects one driving method from a plurality of driving methods on the basis of the control value c and rewrites the image of the display section by using the selected driving method.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: September 1, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Masato Nishizawa
  • Publication number: 20150009245
    Abstract: An electro-optical device includes a control unit that controls a display unit having a plurality of pixels. The control unit performs a differential driving operation of performing an operation of erasing a first image component which is a part of a display image in a first display state and an operation of displaying a second image component which is a part of a display image in a second display state by selectively driving the pixels having different gray scales in the first display state and the second display state when the display unit is changed from the first display state to the second display state. The operation of erasing the first image component includes an extended erasing operation of driving a first pixel group which includes the pixels constituting the first image component and the pixels being adjacent to the first image component and surrounding the first image component.
    Type: Application
    Filed: September 19, 2014
    Publication date: January 8, 2015
    Inventors: Kota MUTO, Masato NISHIZAWA
  • Patent number: 8866858
    Abstract: An electro-optical device includes a control unit that controls a display unit having a plurality of pixels. The control unit performs a differential driving operation of performing an operation of erasing a first image component which is a part of a display image in a first display state and an operation of displaying a second image component which is a part of a display image in a second display state by selectively driving the pixels having different gray scales in the first display state and the second display state when the display unit is changed from the first display state to the second display state. The operation of erasing the first image component includes an extended erasing operation of driving a first pixel group which includes the pixels constituting the first image component and the pixels being adjacent to the first image component and surrounding the first image component.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: October 21, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Kota Muto, Masato Nishizawa
  • Publication number: 20140062850
    Abstract: An electro-optical device includes: a display section that has a plurality of pixels; a control value acquisition section that acquires an initial value of a control value c which is used when an image is displayed on the display section; a calculation section that decreases the control value c whenever the image of the display section is rewritten; and a control section that selects one driving method from a plurality of driving methods on the basis of the control value c and rewrites the image of the display section by using the selected driving method.
    Type: Application
    Filed: September 27, 2013
    Publication date: March 6, 2014
    Applicant: Seiko Epson Corporation
    Inventor: Masato NISHIZAWA
  • Patent number: 8587503
    Abstract: An electro-optical device includes a display unit that includes a plurality of arranged pixels and a control unit that drives the display unit. When a part or the entirety of the display unit is displayed in a single gradation, the control unit performs a first elimination operation of selectively driving a first pixel group including the pixels displayed in gradations other than a first gradation to change the pixels included in the first pixel group to the first gradation, and a second elimination operation of selectively driving a second pixel group including the pixels positioned on the outline of an area formed of the first pixel group and the plurality of pixels provided adjacent to the area formed of the first pixel group and surrounding the area to change the pixels included in the second pixel group to the first gradation.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: November 19, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Kota Muto, Masato Nishizawa
  • Patent number: 8581834
    Abstract: An electro-optical device includes: a display section that has a plurality of pixels; a control value acquisition section that acquires an initial value of a control value c which is used when an image is displayed on the display section; a calculation section that decreases the control value c whenever the image of the display section is rewritten; and a control section that selects one driving method from a plurality of driving methods on the basis of the control value c and rewrites the image of the display section by using the selected driving method.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: November 12, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Masato Nishizawa
  • Patent number: 8421745
    Abstract: A method of driving an electro-optical device including a plurality of pixels, one of which having a first electrode, a second electrode, and an electro-optical material layer, includes: when an image is rewritten, selecting a first display state of the one pixel by applying a first voltage to the first electrode and applying a second voltage to the second electrode, or selecting a second display state of the one pixel by applying a third voltage to the second electrode; and when a part of the image is rewritten, selecting any of the first display state and the second display state of the one pixel by applying a fourth voltage which is different from the first voltage to the first electrode and applying a fifth voltage which has a different polarity from that of the fourth voltage with respect to the first voltage to the second electrode.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: April 16, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Masato Nishizawa
  • Publication number: 20120050349
    Abstract: A display device changes the gray scale of a pixel by performing a write operation in which a voltage is applied to the pixel a plurality of times. In a case where the display state of the pixel is changed based on image data written into a memory, the display device determines whether or not the pixel of which the display state is changed is in the middle of the write operation. The display device starts the write operation for the pixel that is not in the middle of the write operation. On the other hand, for the pixel that is in the middle of the write operation, the display device, after completion of the write operation that is in the middle of the process, starts a new write operation for the pixel so as to have a gray scale determined based on the image data.
    Type: Application
    Filed: August 26, 2011
    Publication date: March 1, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yusuke YAMADA, Kota MUTO, Masato NISHIZAWA
  • Publication number: 20110242147
    Abstract: An electro-optical device includes a control unit that controls a display unit having a plurality of pixels. The control unit performs a differential driving operation of performing an operation of erasing a first image component which is a part of a display image in a first display state and an operation of displaying a second image component which is a part of a display image in a second display state by selectively driving the pixels having different gray scales in the first display state and the second display state when the display unit is changed from the first display state to the second display state. The operation of erasing the first image component includes an extended erasing operation of driving a first pixel group which includes the pixels constituting the first image component and the pixels being adjacent to the first image component and surrounding the first image component.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 6, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kota MUTO, Masato Nishizawa
  • Publication number: 20110221730
    Abstract: A method of driving an electro-optical device including a plurality of pixels, one of which having a first electrode, a second electrode, and an electro-optical material layer, includes: when an image is rewritten, selecting a first display state of the one pixel by applying a first voltage to the first electrode and applying a second voltage to the second electrode, or selecting a second display state of the one pixel by applying a third voltage to the second electrode; and when a part of the image is rewritten, selecting any of the first display state and the second display state of the one pixel by applying a fourth voltage which is different from the first voltage to the first electrode and applying a fifth voltage which has a different polarity from that of the fourth voltage with respect to the first voltage to the second electrode.
    Type: Application
    Filed: February 14, 2011
    Publication date: September 15, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Masato NISHIZAWA
  • Publication number: 20110221732
    Abstract: An electro-optical device includes a display unit that includes a plurality of arranged pixels and a control unit that drives the display unit. When a part or the entirety of the display unit is displayed in a single gradation, the control unit performs a first elimination operation of selectively driving a first pixel group including the pixels displayed in gradations other than a first gradation to change the pixels included in the first pixel group to the first gradation, and a second elimination operation of selectively driving a second pixel group including the pixels positioned on the outline of an area formed of the first pixel group and the plurality of pixels provided adjacent to the area formed of the first pixel group and surrounding the area to change the pixels included in the second pixel group to the first gradation.
    Type: Application
    Filed: March 1, 2011
    Publication date: September 15, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kota MUTO, Masato NISHIZAWA
  • Publication number: 20110216046
    Abstract: An electro-optical device includes: a display section that has a plurality of pixels; a control value acquisition section that acquires an initial value of a control value c which is used when an image is displayed on the display section; a calculation section that decreases the control value c whenever the image of the display section is rewritten; and a control section that selects one driving method from a plurality of driving methods on the basis of the control value c and rewrites the image of the display section by using the selected driving method.
    Type: Application
    Filed: February 14, 2011
    Publication date: September 8, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Masato NISHIZAWA
  • Publication number: 20110025888
    Abstract: A multiple-stage vertical CCD, a vertical transfer section for alternately transferring the first signal containing a smear signal and image signal and the second signal containing only a smear signal to each register of vertical registers, a horizontal section for alternately outputting the first signal and the second signal from a horizontal register, and a signal subtractor for subtracting the second signal from the first signal are included. A smear correction method of gaining an image signal without smear signal by subtracting the second signal from the first signal is provided.
    Type: Application
    Filed: March 27, 2009
    Publication date: February 3, 2011
    Applicant: Panasonic Corporation
    Inventors: Masato Nishizawa, Kazunaga Miyake
  • Patent number: 7688296
    Abstract: A cholesteric liquid crystal driving device according to the present invention includes a first driving circuit for displaying one part of the image data to be displayed by a cholesteric liquid crystal on a first scanning line by driving the cholesteric liquid crystal on the first scanning line in accordance with first and second cycles; and a second driving circuit for displaying the other part of the image data to be displayed by a cholesteric liquid crystal on a second scanning line by driving the cholesteric liquid crystal on the second scanning line in accordance with a third or fourth cycle.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: March 30, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Masato Nishizawa, Kazunori Hiramatsu, Munenori Sawada
  • Publication number: 20090115860
    Abstract: The present invention provides an image pickup device which is lower in production cost and smaller in size than the conventional image pickup device. The image pickup device 1 comprises an image sensor 12 having an acceptance surface to pick up an image focused on the acceptance surface via a lens 11, an image stabilization section 13 for stabilizing the image by compensating a blur occurring in the image on the basis of at least two different images picked up by the image sensor 12 exposed for respective different exposure times, and an output section 14 for outputting the stabilized image.
    Type: Application
    Filed: April 5, 2007
    Publication date: May 7, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Toshiyuki Nakashima, Masato Nishizawa, Kazunaga Miyake
  • Publication number: 20070279618
    Abstract: The present invention provides an imaging apparatus, comprising a multifocal lens (210) having a plurality of lens portions different from one another in focal length; an imaging device (29) for converting an image formed thereon by said multifocal lens (210) into an electric signal to be outputted therethrough as an image signal; a computing unit (33) for carrying out a weighted computing process on said image signal from said imaging device (29) in accordance with a predetermined compensation function to output a compensated image signal as an output image signal, and in which said compensation function is an inverse function obtained based on a point spread function with respect to an object disposed at a predetermined distance from an optical system constituted by said multifocal lens (210).
    Type: Application
    Filed: October 14, 2005
    Publication date: December 6, 2007
    Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., RIVERBELL CO., LTD.
    Inventors: Misa Sano, Masato Nishizawa, Takuya Imaoka, Tsutomu Fujita, Masatomo Kanegae
  • Patent number: 7245764
    Abstract: The invention provides an image processing method, an image processing apparatus, and a projector which determine a scene-change so as to perform an optimal tone conversion, luminance correction, or the like, for each scene of a moving image. An image processing apparatus includes a normalized-luminance-histogram computing unit to compute a normalized luminance histogram for each frame, histogram buffers to store normalized luminance histograms of respective comparing frames, a scene-change-detecting reference-value computing unit to compute scene-change-detecting reference values ? and ? corresponding to correlations between two normalized luminance histograms of the first and second frames respectively stored in the histogram buffers, and a scene-change determining unit to determine whether a change in scenes between images of the first and second frames has occurred or not, in accordance with the scene-change-detecting reference values ? and ?.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: July 17, 2007
    Assignee: Seiko Epson Corporation
    Inventor: Masato Nishizawa