Hitachi, Ltd.

Hideki Yamazaki

Hiroshi Takeda

Yoshikazu Yokota

Moriaki Fuyama

Shinji Narishige

Takashi Kawabe

Makoto Morijiri

Shunichiro Kuwatsuka

Makoto Saito

Hiroshi Fukui

Hiroshi Ikeda

Yutaka Sugita

Yokuo Saitoh

Tadayuki Iwakura

Eiji Ashida

Eisei Togawa

Saburo Suzuki

Makoto Aihara

Masatoshi Tsuchiya

Eizi Ashida

An image memory controller having a first address signal generating unit generating a first address signal in response to a state signal representing the operational state of a printer. The first address signal corresponds to a location in an image memory. A second address signal generating unit generates a second address signal for refreshing the image memory and a third address signal generating unit generates a third address signal used for rewriting at least part of data stored in the image memory. An address signal selector selectively delivers any of the first, second, and third address signals to the image memory.

Controller for accessing an image data memory based on a state of a hard

A magnetic disc apparatus includes a magnetic disc for recording information; a thin film magnetic head including a magnetic pole structure having an upper magnetic pole tip and a lower magnetic pole tip arranged to provide a magnetic gap at respective end portions thereof for writing and reading information in and from the magnetic disc; a device for rotating the magnetic disc; and a device for positioning the thin film magnetic head; the upper and lower magnetic pole tips having different contours at the respective end portions as viewed from a side confronting the magnetic disc wherein the difference (.DELTA.CW in .mu.m) in the width, along the magnetic gap, of the upper magnetic pole tip and the width, along the magnetic gap, of the lower magnetic pole tip satisfies the relation

Magnetic disc apparatus with thin film head suitable for high-density

A thin film magnetic head including conductor coils, a plurality of insulating layers to interpose and insulate the conductor coils and a magnetic gap layer between upper and lower magnetic cores, in which another insulating layer is provided on a stepped region formed by end faces of the plurality of insulating layers.

Thin film magnetic head and manufacturing method therefor

An image memory controller having a first address signal generation means for generating a first address signal in response to a state signal representing the operational state of a printer. The first address signal corresponds to a location in an image memory. A second address signal generation means generates a second address signal for refreshing the image memory and a third address signal generation means generates a third address signal used for rewriting at least part of data stored in the image memory. An address signal selection means selectively delivers any of the first, second, and third address signals to the image memory.

Image memory controller

A display control system is provided which includes window management circuits having a plurality of area setting registers for individually setting a plurality of window display areas on a display surface, and for judging sequentially for each window whether or not a display position on the display surface is contained in the area designated by the register. A window display priority designation circuit is also provided having a plurality of priority setting registers for setting display priority of each window, and for determining which window has higher priority among a plurality of windows which are determined as containing the present display position on the basis of the content of the priority setting register and the result of a determination of which windows contain the present display position made by the window management circuit.

Display control apparatus including a window display priority

An image memory controller having a first address signal generator for generating a first address signal in response to a state signal representing the operational state of a printer. The first address signal corresponds to a location in an image memory. A second address signal generator generates a second address signal for refreshing the image memory and a third address signal generation means generates a third address signal used for rewriting at least part of data stored in the image memory. An address signal selector selectively delivers any of the first, second and third address signals to the image memory.

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Hitachi, Japan

Hideki Yamazaki