Patents by Inventor Masakazu Satoh

Masakazu Satoh 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).

  • Patent number: 8411027
    Abstract: A plurality of scanning signal lines GLn divided into groups, and each group is made up of three scanning signal lines GLnR, GLnG and GLnB, and a plurality of pixels are divided into pixel blocks, and each pixel block is made up of three pixels PR (n, m), PG (n, m) and PB (n, m) respectively connected to the scanning signal lines GLnR, GLnG and GLnB. These pixels PR (n, m), PG (n, m) and PB (n, m) are connected to a common data signal line SLm. To the scanning signal lines GLnR, GLnG, GLnB, scanning pulses are sequentially outputted to the scanning signal lines GLnR, GLnG and GLnB from shift registers SRnR, SRnG and SRnB, and video signals for R, G and B are outputted to the data signal line SLm from a driver IC by time division.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: April 2, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masakazu Satoh, Hajime Washio, Sadahiko Yasukawa
  • Patent number: 8368676
    Abstract: A light shield (204) for blocking light traveling toward a PIN photodiode (413) from a glass substrate (314) side is formed of a conductive material, and a reference electric potential (Vr?nVoc) equal to that of a cathode of the PIN photodiode (413) is applied to the light shield (204) from a power supply circuit (266). Thus, inductive noise for a photoelectric conversion device used for an ambient light sensor is further reduced in a display device.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: February 5, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masakazu Satoh, Hiromi Katoh, Benjamin James Hadwen
  • Patent number: 8330893
    Abstract: An active matrix substrate (20a) defining a display region (D) which contributes to display and a frame region (F) which is arranged outside the display region (D) and does not contribute to display, the active matrix substrate (20a) comprising: a grounding wire (23) extending along a circumference of the frame region (F) in the frame region (F), wherein a gate electrode line (14b), part of which overlapping the grounding wire (23) constitutes an electrostatic protection element (25), is arranged in part of the frame region (F) outside the grounding wire (23).
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: December 11, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Masakazu Satoh
  • Patent number: 8309901
    Abstract: In a liquid crystal display device (1), (i) regions where respective detecting devices (201) are provided and (ii) regions where respective reference devices (202) are provided are separately arranged so as to be alternated along a frame. In each region, a predetermined number of PIN photodiodes (413) are connected in series and in parallel. In the whole of the first regions, (i) a series connection of n PIN photodiode(s) and (ii) a predetermined number of parallel connections are provided; in the whole of the second regions, (i) a series connection of n PIN photodiode(s) and (ii) a predetermined number of parallel connections are provided. Thus, even in a case where there is a great variation in the characteristics of photoelectric conversion device elements in a display panel which photoelectric conversion device elements configure a photoelectric conversion device, an intensity of ambient light can be detected accurately in the display device.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: November 13, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masakazu Satoh, Hiromi Katoh, Benjamin James Hadwen
  • Patent number: 8300822
    Abstract: A system for processing a communication data item. The communication data item is divided into at least two unencrypted packets to be encrypted. Each encrypted packet is generated from a corresponding unencrypted packet. Each unencrypted packet has a packet header and plaintext data. The packet header has an identifier field that includes a packet identifier that is identical for all unencrypted packets. Generating an encrypted packet for each unencrypted packet includes: determining a vector identifier from the identical packet identifier, wherein the vector identifier is associated with the identical packet identifier; ascertaining an initial vector from the vector identifier; and forming an encrypted packet header by inserting the vector identifier into a first portion of the packet header and encrypting a second portion of the packet header through use of the initial vector. The encrypted packets are subsequently decrypted and combined to reconstruct the communication data item.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: October 30, 2012
    Assignee: International Business Machines Corporation
    Inventors: Shinji Nakai, Masakazu Satoh, Kazunari Suzuki
  • Patent number: 8271781
    Abstract: A method for authentication. A computer obtains a random number R generated by a hardware token. The computer forms and returns to the hardware token a signature Ck?(R) formed using the random number R with a computer secret key Ck?. The computer receiving from the hardware token authentication of the signature Ck?(R) that is performed by the hardware token using a computer public key Ck stored in the hardware token.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: September 18, 2012
    Assignee: International Business Machines Corporation
    Inventor: Masakazu Satoh
  • Patent number: 8094116
    Abstract: The present invention relates to a serial-parallel conversion circuit of a display device. First latch circuits for sampling and latching a serial signal in accordance with sampling pulses outputted from a shift register (31) are provided in association with stages of the shift register (31). In addition, second latch circuits for latching signals outputted from the first latch circuits are provided in association with portions of the stages of the shift register (31). In this case, of all the stages of the shift register (31), the number of stages associated with the second latch circuits is less than the total number of stages of the shift register by two or more.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: January 10, 2012
    Assignee: Sharp Kabsuhiki Kaisha
    Inventors: Tamotsu Sakai, Tomoyuki Nagai, Kazuhiro Maeda, Shuji Nishi, Masakazu Satoh
  • Publication number: 20110181556
    Abstract: The present invention relates to a serial-parallel conversion circuit of a display device. First latch circuits for sampling and latching a serial signal in accordance with sampling pulses outputted from a shift register (31) are provided in association with stages of the shift register (31). In addition, second latch circuits for latching signals outputted from the first latch circuits are provided in association with portions of the stages of the shift register (31). In this case, of all the stages of the shift register (31), the number of stages associated with the second latch circuits is less than the total number of stages of the shift register by two or more.
    Type: Application
    Filed: September 9, 2005
    Publication date: July 28, 2011
    Inventors: Tamotsu Sakai, Tomoyuki Nagai, Kazuhiro Maeda, Shuji Nishi, Masakazu Satoh
  • Publication number: 20110145573
    Abstract: A system for processing a communication data item. The communication data item is divided into at least two unencrypted packets to be encrypted. Each encrypted packet is generated from a corresponding unencrypted packet. Each unencrypted packet has a packet header and plaintext data. The packet header has an identifier field that includes a packet identifier that is identical for all unencrypted packets. Generating an encrypted packet for each unencrypted packet includes: determining a vector identifier from the identical packet identifier, wherein the vector identifier is associated with the identical packet identifier; ascertaining an initial vector from the vector identifier; and forming an encrypted packet header by inserting the vector identifier into a first portion of the packet header and encrypting a second portion of the packet header through use of the initial vector. The encrypted packets are subsequently decrypted and combined to reconstruct the communication data item.
    Type: Application
    Filed: December 28, 2010
    Publication date: June 16, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Shinji Nakai, Masakazu Satoh, Kazunari Suzuki
  • Patent number: 7869358
    Abstract: A communication relay apparatus, information management system, and control method and program therefor. The communication relay apparatus includes several communication ports, and that includes a communication relay section, a buffer, a control signal transmitting section, a bandwidth information acquiring section, and a transmission interval control section.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: January 11, 2011
    Assignee: International Business Machines Corporation
    Inventors: Masakazu Satoh, Kazunari Suzuki
  • Patent number: 7869597
    Abstract: A method for processing a communication data item. The communication data item is divided into at least two unencrypted packets to be encrypted. Each encrypted packet is generated from a corresponding unencrypted packet. Each unencrypted packet has a packet header and plaintext data. The packet header has an identifier field that includes a packet identifier. The packet identifier is identical for all unencrypted packets. Generating an encrypted packet for each unencrypted packet includes: determining a vector identifier from the identical packet identifier, wherein the vector identifier is associated with the identical packet identifier; ascertaining an initial vector from the vector identifier; and forming an encrypted packet header by inserting the vector identifier into a first portion of the packet header and encrypting a second portion of the packet header through use of the initial vector. The encrypted packets are subsequently decrypted and combined to reconstruct the communication data item.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: January 11, 2011
    Assignee: International Business Machines Corporation
    Inventors: Shinji Nakai, Masakazu Satoh, Kazunari Suzuki
  • Publication number: 20100325428
    Abstract: A method for authentication. A computer obtains a random number R generated by a hardware token. The computer forms and returns to the hardware token a signature Ck?(R) formed using the random number R with a computer secret key Ck?. The computer receiving from the hardware token authentication of the signature Ck?(R) that is performed by the hardware token using a computer public key Ck stored in the hardware token.
    Type: Application
    Filed: June 4, 2010
    Publication date: December 23, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Masakazu Satoh
  • Patent number: 7752445
    Abstract: Authentication of a hardware token connected to a computer includes storing, in the hardware token, a computer public key Ck generated in the computer; reading out, from the hardware token to the computer, a user public key Uk, registering the user public key Uk from the computer with a certificate authority, and receiving a certificate issued from the certificate authority with respect to the user public key Uk, and storing the issued certificate for the user public key Uk in the hardware token.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: July 6, 2010
    Assignee: International Business Machines Corporation
    Inventor: Masakazu Satoh
  • Publication number: 20100127280
    Abstract: Provided is a photo sensor that can be downsized while suppressing occurrence of noise caused by a dark current, and a display device including the photo sensor. The photo sensor used includes a plurality of photodiodes (9-11) formed in a same silicon layer (8). The photodiodes (9-11) have p-type semiconductor regions (9a, 10a, 11a) and n-type semiconductor regions (9c, 10c, 11c) formed respectively in the silicon layer (8). Further, the photodiodes (9-11) are arranged in series so that the respective forward directions will be aligned with each other. In two photodiodes adjacent to each other, the n-type semiconductor region of one of the photodiodes and the p-type semiconductor region of the other photodiode are formed to overlap each other in the thickness direction of the silicon layer.
    Type: Application
    Filed: April 10, 2008
    Publication date: May 27, 2010
    Inventors: Hiromi Katoh, Masakazu Satoh, Benjamin Hadwen
  • Publication number: 20100110096
    Abstract: A light shield (204) for blocking light traveling toward a PIN photodiode (413) from a glass substrate (314) side is formed of a conductive material, and a reference electric potential (Vr?nVoc) equal to that of a cathode of the PIN photodiode (413) is applied to the light shield (204) from a power supply circuit (266). Thus, inductive noise for a photoelectric conversion device used for an ambient light sensor is further reduced in a display device.
    Type: Application
    Filed: May 19, 2008
    Publication date: May 6, 2010
    Inventors: Masakazu Satoh, Hiromi Katoh, Benjamin James Hadwen
  • Publication number: 20100103153
    Abstract: A plurality of scanning signal lines GLn divided into groups, and each group is made up of three scanning signal lines GLnR, GLnG and GLnB, and a plurality of pixels are divided into pixel blocks, and each pixel block is made up of three pixels PR (n, m), PG (n, m) and PB (n, m) respectively connected to the scanning signal lines GLnR, GLnG and GLnB. These pixels PR (n, m), PG (n, m) and PB (n, m) are connected to a common data signal line SLm. To the scanning signal lines GLnR, GLnG, GLnB, scanning pulses are sequentially outputted to the scanning signal lines GLnR, GLnG and GLnB from shift registers SRnR, SRnG and SRnB, and video signals for R, G and B are outputted to the data signal line SLm from a driver IC by time division.
    Type: Application
    Filed: December 18, 2009
    Publication date: April 29, 2010
    Inventors: Masakazu Satoh, Hajime Washio, Sadahiko Yasukawa
  • Publication number: 20100073587
    Abstract: An active matrix substrate (20a) defining a display region (D) which contributes to display and a frame region (F) which is arranged outside the display region (D) and does not contribute to display, the active matrix substrate (20a) comprising: a grounding wire (23) extending along a circumference of the frame region (F) in the frame region (F), wherein a gate electrode line (14b), part of which overlapping the grounding wire (23) constitutes an electrostatic protection element (25), is arranged in part of the frame region (F) outside the grounding wire (23).
    Type: Application
    Filed: July 23, 2007
    Publication date: March 25, 2010
    Inventor: Masakazu Satoh
  • Publication number: 20100059660
    Abstract: In a liquid crystal display device (1), (i) regions where respective detecting devices (201) are provided and (ii) regions where respective reference devices (202) are provided are separately arranged so as to be alternated along a frame. In each region, a predetermined number of PIN photodiodes (413) are connected in series and in parallel. In the whole of the first regions, (i) a series connection of n PIN photodiode(s) and (ii) a predetermined number of parallel connections are provided; in the whole of the second regions, (i) a series connection of n PIN photodiode(s) and (ii) a predetermined number of parallel connections are provided. Thus, even in a case where there is a great variation in the characteristics of photoelectric conversion device elements in a display panel which photoelectric conversion device elements configure a photoelectric conversion device, an intensity of ambient light can be detected accurately in the display device.
    Type: Application
    Filed: May 19, 2008
    Publication date: March 11, 2010
    Inventors: Masakazu Satoh, Hiromi Katoh, Benjamin James Hadwen
  • Publication number: 20100045642
    Abstract: A first shield electrode (516), which is an electrostatic shield, is formed so as to be closer to a glass substrate (314) side than wiring (265) is. A power source circuit (266) supplies, to the first shield electrode (516), a reference potential (Vr?nVoc) equal to that of a cathode of a PIN photodiode (413). Thus, inductive noise for wiring for transmitting an output from a photoelectric conversion device used for an ambient light sensor is further reduced in a display device.
    Type: Application
    Filed: May 19, 2008
    Publication date: February 25, 2010
    Inventors: Masakazu Satoh, Hiromi Katoh, Benjamin Hadwen
  • Patent number: 7649521
    Abstract: A plurality of scanning signal lines GLn divided into groups, and each group is made up of three scanning signal lines GLnR, GLnG and GLnB, and a plurality of pixels are divided into pixel blocks, and each pixel block is made up of three pixels PR (n, m), PG (n, m) and PB (n, m) respectively connected to the scanning signal lines GLnR, GLnG and GLnB. These pixels PR (n, m), PG (n, m) and PB (n, m) are connected to a common data signal line SLm. To the scanning signal lines GLnR, GLnG, GLnB, scanning pulses are sequentially outputted to the scanning signal lines GLnR, GLnG and GLnB from shift registers SRnR, SRnG and SRnB, and video signals for R, G and B are outputted to the data signal line SLm from a driver IC by time division.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: January 19, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masakazu Satoh, Hajime Washio, Sadahiko Yasukawa