Patents by Inventor Yoshitaka Fukuma

Yoshitaka Fukuma 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).

  • Data processor with wireless auxiliary input apparatus
    Patent number: 5307297
    Abstract: In a data processor having a box type unit in which a keyboard and a folding display are incorporated, the data processor includes a main unit which has a receiver for wireless signals on an external side wall close to a supporter for pivotally supporting the folding display, and an auxiliary input apparatus having a case unit and a wireless signal transmitting unit at a corner of said case unit which is opposed to the receiving unit of said main unit when juxtaposed with said keyboard.
    Type: Grant
    Filed: May 5, 1992
    Date of Patent: April 26, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shigeki Iguchi, Yukihiko Ueno, Seiichi Senoo, Tomoyuki Yano, Tokuyuki Shirasuka, Akira Mitarai, Yoshitaka Fukuma, Yoshito Kataoka, Hirofumi Nishikawa, Yasumasa Yamanaka, Yoshiki Oka, Masashi Hara, Masaharu Satoh
  • Data transmission processing machine
    Patent number: 4987588
    Abstract: A data transmission processing machine interposed between a host computer and a telephone line comprises a telephone circuit, a modem, a keyboard, and a mode selection switch. Responsive to a mode selected by the mode selection switch, the keyboard is operated either as a dial for the telephone or as a data entry keyboard for the modem.
    Type: Grant
    Filed: September 19, 1989
    Date of Patent: January 22, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshitaka Fukuma, Taiji Iizuka
  • Liquid crystal display drive circuit with variable sequence of backplate scanning and variable duty factor
    Patent number: 4737782
    Abstract: A drive circuit is used to drive a data matrix liquid crystal display panel that can be applied to a variety of uses wherein said drive circuit either generates the backplate signal using any optional sequence or optionally provides any desired duty factor.The drive circuit chip itself contains RAM, and in responding to the data contents in said RAM, both the backplate and segment signals are generated, where the drive circuit provides any desired sequence that can optionally be determined in accordance with the RAM data contents.As an alternative embodiment of the present invention, the drive circuit chip comprises a built-in counter that determines the duty factor of the liquid crystal enable signals, where the duty factor can optionally be set by varying the operational conditions of said counter.
    Type: Grant
    Filed: January 6, 1986
    Date of Patent: April 12, 1988
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshitaka Fukuma, Tosaku Nakanishi
  • Display drive without initial disturbed state of display
    Patent number: 4599613
    Abstract: A display drive especially for use with a liquid crystal display panel is disclosed herein, which avoids disturbance of the contents on display and ensures high degrees of commercial value and display quality of the display. The display drive prohibits operation of the display just after initial power application and thereafter allows the display to operate in normal manner. The display is responsive to the signal for use in data processing, no particular terminals are necessary on integrated circuit devices in receiving externally signals.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: July 8, 1986
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshitaka Fukuma, Tosaku Nakanishi