Patents by Inventor Ritsuko Suzuki

Ritsuko Suzuki 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).

  • Driver circuit for display device
    Patent number: 7432905
    Abstract: A driver circuit for use in an active matrix display having switching devices at pixels. The driver circuit uses no shift registers. Random access to signal lines or scanning lines can be obtained. The display quality is improved. The production yield is improved. Also, lower electric power consumption and higher-speed operation can be accomplished. Data about gray levels assumes the form of digital values and is supplied to the driver circuit. The signal lines or scanning lines are selected by an address decoder circuit.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: October 7, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Jun Koyama, Ritsuko Suzuki
  • Driver circuit for display device
    Publication number: 20040183766
    Abstract: A driver circuit for use in an active matrix display having switching devices at pixels. The driver circuit uses no shift registers. Random access to signal lines or scanning lines can be obtained. The display quality is improved. The production yield is improved. Also, lower electric power consumption and higher-speed operation can be accomplished. Data about gray levels assumes the form of digital values and is supplied to the driver circuit. The signal lines or scanning lines are selected by an address decoder circuit.
    Type: Application
    Filed: April 5, 2004
    Publication date: September 23, 2004
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Jun Koyama, Ritsuko Suzuki
  • Driver circuit for display device
    Patent number: 6731264
    Abstract: A driver circuit for use in an active matrix display having switching devices at pixels. The driver circuit uses no shift registers. Random access to signal lines or scanning lines can be obtained. The display quality is improved. The production yield is improved. Also, lower electric power consumption and higher-speed operation can be accomplished. Data about gray levels assumes the form of digital values and is supplied to the driver circuit. The signal lines or scanning lines are selected by an address decoder circuit.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: May 4, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Jun Koyama, Ritsuko Suzuki
  • Driver circuit for display device
    Publication number: 20020057244
    Abstract: A driver circuit for use in an active matrix display having switching devices at pixels. The driver circuit uses no shift registers. Random access to signal lines or scanning lines can be obtained. The display quality is improved. The production yield is improved. Also, lower electric power consumption and higher-speed operation can be accomplished. Data about gray levels assumes the form of digital values and is supplied to the driver circuit. The signal lines or scanning lines are selected by an address decoder circuit.
    Type: Application
    Filed: November 9, 2001
    Publication date: May 16, 2002
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Jun Koyama, Ritsuko Suzuki
  • Drive circuit for display device
    Patent number: 6344843
    Abstract: A driver circuit for use in an active matrix display having switching devices at pixels. The driver circuit uses no shift registers. Random access to signal lines or scanning lines can be obtained. The display quality is improved. The production yield is improved. Also, lower electric power consumption and higher-speed operation can be accomplished. Data about gray levels assumes the form of digital values and is supplied to the driver circuit. The signal lines or scanning lines are selected by an address decoder circuit.
    Type: Grant
    Filed: September 27, 1995
    Date of Patent: February 5, 2002
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Jun Koyama, Ritsuko Suzuki
  • Active matrix display with synchronous up/down counter and address decoder used to change the forward or backward direction of selecting the signal or scanning lines
    Patent number: 6177920
    Abstract: In a signal line driver circuit for an active matrix type display device for performing a plurality of gradation displays, an output signal of a synchronous type clock counter is supplied as an address signal to an address decoder circuit through address lines. Gradation data is stored in latch circuits in accordance with the address signal used as latch pulse. In a synchronizing circuit, an output timing of the gradation data stored in the latch circuits is synchronized with a display scan timing. After the output gradation data is converted into an analog gradation voltage, the analog gradation voltage is applied to a pixel portion through an analog switch.
    Type: Grant
    Filed: October 2, 1995
    Date of Patent: January 23, 2001
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Jun Koyama, Ritsuko Suzuki