Patents by Inventor Keiji Kawashima

Keiji Kawashima 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: 20090231351
    Abstract: An object of the present invention is to provide a memory device and a memory application device which can reduce memories and reduce burden on processings by reading out predetermined bit data stored in plural memory addresses as data output from the memory device. The memory device of the present invention is provided with multiplexers (301, . . . , 3n?1n-2) which can selectively output data in memory cells (000, . . . , n?1m-1n-1) outputted by buffer circuits (200, . . . , 2n?1n-1) one-bit by one-bit from each of memory cell arrays (10 to 1n-1) or n bits from one memory cell array.
    Type: Application
    Filed: July 21, 2006
    Publication date: September 17, 2009
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventor: Keiji Kawashima
  • Patent number: 6674413
    Abstract: A display control apparatus includes at least one output control unit, and each output control unit comprises: a tri-state buffer receiving, as a signal input, a one-bit color signal, and receiving, as a control input, a one-bit intermediate color control signal for controlling an intermediate color of the color signal, and setting its output in one of the following three states: a state of outputting a first voltage, a state of outputting a second voltage, and a high impedance state, on the basis of the color signal and the intermediate color control signal; a first resistor having an end connected to a power supply, and the other end connected to the output of the tri-state buffer; and a second resistor having an end connected to the ground, and the other end connected to the output of the tri-state buffer. Therefore, it is possible to provide a display control apparatus that is able to perform intermediate color display, with reduced manufacturing cost and reduced power consumption.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: January 6, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masao Inoue, Keiji Kawashima, Masayuki Nakaimuki
  • Publication number: 20010026250
    Abstract: A display control apparatus includes at least one output control unit, and each output control unit comprises: a tri-state buffer receiving, as a signal input, a one-bit color signal, and receiving, as a control input, a one-bit intermediate color control signal for controlling an intermediate color of the color signal, and setting its output in one of the following three states: a state of outputting a first voltage, a state of outputting a second voltage, and a high impedance state, on the basis of the color signal and the intermediate color control signal; a first resistor having an end connected to a power supply, and the other end connected to the output of the tri-state buffer; and a second resistor having an end connected to the ground, and the other end connected to the output of the tri-state buffer. Therefore, it is possible to provide a display control apparatus that is able to perform intermediate color display, with reduced manufacturing cost and reduced power consumption.
    Type: Application
    Filed: March 29, 2001
    Publication date: October 4, 2001
    Inventors: Masao Inoue, Keiji Kawashima, Masayuki Nakaimuki