Patents by Inventor Zenzo Oda

Zenzo Oda 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: 7173876
    Abstract: A semiconductor integrated circuit is provided, using a one-port memory cell, capable of smoothly performing a data write/read operation in accordance with an instruction from a CPU and a data read operation to display an image on a display panel. The semiconductor integrated circuit includes a memory cell having a port through which data is input to and output from a set of bit lines, a write/read circuit connected with the port via the set of bit lines, a read circuit connected with the port via the set of bit lines, a CPU-system control circuit that controls the write/read circuit so that a data write or read operation based on a write request or read request from a CPU is performed for a first period, and a display-system control circuit that controls the read circuit so that data to be supplied to a display panel is read for a second period which does not overlap the first period.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: February 6, 2007
    Assignee: Seiko Epson Corporation
    Inventor: Zenzo Oda
  • Publication number: 20040228199
    Abstract: A semiconductor integrated circuit is provided, using a one-port memory cell, capable of smoothly performing a data write/read operation in accordance with an instruction from a CPU and a data read operation to display an image on a display panel. The semiconductor integrated circuit includes a memory cell having a port through which data is input to and output from a set of bit lines, a write/read circuit connected with the port via the set of bit lines, a read circuit connected with the port via the set of bit lines, a CPU-system control circuit that controls the write/read circuit so that a data write or read operation based on a write request or read request from a CPU is performed for a first period, and a display-system control circuit that controls the read circuit so that data to be supplied to a display panel is read for a second period which does not overlap the first period.
    Type: Application
    Filed: March 11, 2004
    Publication date: November 18, 2004
    Inventor: Zenzo Oda
  • Patent number: 6724378
    Abstract: There is provided a display driver incorporating a RAM in which a plurality of memory cells having a three-port configuration can be provided within an interval of output electrodes thereof, and a display unit and an electronic apparatus utilizing the same. The memory cells include a flip-flop comprised of first and second inverters. A first node of the flip-flop is connected to a CPU bit line and an RGB bit line through an N-type MOS transistor. A P-type MOS transistor and an N-type MOS transistor are connected to a second node of the flip-flop. The N-type MOS transistor is connected to a ground potential level at the source terminal thereof. A set signal for each pixel is supplied to the gate terminal of only the flip-flop associated with the pixel to be written, and the set signal sets the second node at the ground potential level.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: April 20, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Tsuyoshi Tamura, Zenzo Oda
  • Patent number: 6489668
    Abstract: The present invention is a semiconductor device which can improve the adhesive force between a semiconductor chip substrate. This semiconductor device 60 has a semiconductor chip 18, a die pad (metallic portion) 16 on which the semiconductor chip 18 is fixedly mounted and supported through an adhesive layer 62, and a sealing resin 24 for sealing the die pad 16 and semiconductor chip 18. The adhesive layer 62 includes a plurality of conductive adhesive regions 66 and a plurality of insulative adhesive regions 64 together.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: December 3, 2002
    Assignee: Seiko Epson Corporation
    Inventors: Zenzo Oda, Tadashi Komiyama, Toshinori Nakayama, Osamu Omori
  • Publication number: 20020113783
    Abstract: There is provided a display driver incorporating a RAM in which a plurality of memory cells having a three-port configuration can be provided within an interval of output electrodes thereof, and a display unit and an electronic apparatus utilizing the same. The memory cells include a flip-flop comprised of first and second inverters. A first node of the flip-flop is connected to a CPU bit line and an RGB bit line through an N-type MOS transistor. A P-type MOS transistor and an N-type MOS transistor are connected to a second node of the flip-flop. The N-type MOS transistor is connected to a ground potential level at the source terminal thereof. A set signal for each pixel is supplied to the gate terminal of only the flip-flop associated with the pixel to be written, and the set signal sets the second node at the ground potential level.
    Type: Application
    Filed: January 29, 2002
    Publication date: August 22, 2002
    Inventors: Tsuyoshi Tamura, Zenzo Oda
  • Patent number: 5490117
    Abstract: An objective of the present invention is to provide a highly reliable IC card which is large in the scale of integration, fast, and low power-consuming, which contains the latest type of IC that has an operating voltage of 3.3 V and a maximum rated voltage of 5 V or less, and which can be used in either the latest equipment rated at 3.3 V or existing equipment rated at 5 V, or which does not cause this latest type of IC to be destroyed. The interface circuit comprises an analog switch, an external interface circuit, an interval interface circuit, and a high-voltage detection circuit. If the voltage of the power supply Vcc of the host system is less than or equal to an upper-limit voltage of 4 V, the power supply voltage is applied unchanged through the analog switch to a ROM that is the main circuit. On the other hand, if the power supply voltage is greater than this upper-limit voltage of 4 V, the analog switch is made non-conductive and thus the power supply voltage is not applied to the ROM.
    Type: Grant
    Filed: March 23, 1994
    Date of Patent: February 6, 1996
    Assignee: Seiko Epson Corporation
    Inventors: Zenzo Oda, Noriaki Sakurada