Sharp Kabushiki Kaisha Corporation

Toshiaki Fujikawa

Toshihiro Yamanaka

Nobuyuki Horie

Yoshiki Nishioka

Noriaki Sakamoto

Noriaki Sakamoro

Junichi Komatsu

Koji Mizuno

A small-sized office computer includes a cathode ray tube displaying a plurality of desired ruled line frames and desired characters or other information on the display during execution of business processes. The screen information is stored on a recording medium such as a floppy disc. Means are provided for specifying parameters in response to introduction of information into respective ruled line frames and programs are prepared using the parameters. The screen information is read and displayed through execution of said programs.

Programmable system for inputting & Processing data using visually

A floppy disk drive system with a stand-by mode that shuts off power to the drive circuits that drive the head-positioning motor and the disk drive motor. The stand-by model is activated when no motor-activating signal is input within a predetermined period of time. As a result, this unique stand-by mode significantly reduces the power consumption of the floppy disk drive unit. At the same time, the stand-by mode extends the service life of several important components, such as the head-positioning pulse motor. When the stand-by mode is entered from the normal mode, the current position of the head is stored. Then when the normal mode is to be reentered from the stand-by mode, the head is first moved to a reference track and then back to the position at which the stand-by mode was entered so that the value of the two counters is equal.

Floppy disk drive with stand-by mode

A floppy disk driving circuit comprises a memory circuit for storing a plurality of items of delay time of a pair of erase heads from the switching-ON and the switching-OFF of a read/write head for all the tracks of a floppy disk, a control circuit responsive to the memory circuit for controlling ON- and OFF-delay timing of the pair of erase heads based on the plurality of items of delay timing. The plurality of items of suitable timing are previously calculated in connection with the respective tracks of the disk and stored within the memory circuit.

Floppy disk driving with suitable on-delay and off-delay timing

Growing community of inventors

Ikoma, Japan

Toshiaki Fujikawa