Hideo Maejima, Koyo Katsura, Toshimasa Kihara, Yasushi Akao: Data processing apparatus with clock signal control by microinstruction for reduced power consumption and method therefor. Hitachi, Antonelli Terry & Wands, September 30, 1986: US04615005 (140 worldwide citation)

Disclosed is a method of controlling the supply of a clock signal to a logic circuit, especially, a logic circuit composed of C-MOS gates for further reducing the power consumption. According to the control method, a clock signal supply inhibit instruction is stored, so that, when this instruction i ...

Toshifumi Arai, Kimiyoshi Machii, Koyo Katsura, Hideyuki Watanabe: Pen type input device with camera. Hitachi, Hitachi Via Mechanics, Antonelli Terry Stout and Kraus, February 28, 2006: US07006134 (95 worldwide citation)

A pen type input device with a camera has improved usability as a result in improved construction of the device. The pen type input device with the camera is adapted for use in detecting both of a horizontally elongated object and a vertically elongated object. On the other hand, means for pointing ...

Yasuhiro Nakatsuka, Keisuke Nakashima, Shigeru Matsuo, Masahisa Narita, Koyo Katsura, Hidehito Takewa, Tomoaki Aoki: Image data processor for processing pixel data in block buffer. Hitachi, Hitachi Engineering, Antonelli Terry Stout & Kraus, May 5, 1998: US05748202 (85 worldwide citation)

In a device and system which perform processing, (displaying and outputting) of image data, the amount of data transferred between a memory holding the image data and a processor processing the image data is limited, thereby a great amount of data can be processed at high speed.

Koyo Katsura, Shigeru Matsuo, Jun Sato, Takashi Sone, Yoshikazu Yokota, Masahiko Kikuchi: Graphic processing system having bus connection control capable of high-speed parallel drawing processing in a frame buffer and a system memory. Hitachi, Hitachi Engineering, Antonelli Terry Stout & Kraus, September 3, 1991: US05046023 (69 worldwide citation)

A graphic processing system including a main memory for storing a program and information corresponding to pixels, a main processor for effecting an execution processing of a program transferred from the main memory or from an external device so as to control the system, display/output devices such ...

Kazuyoshi Koga, Ryo Fujita, Koyo Katsura, Katsunori Suzuki, Toshiyuki Kuwana: Graphics system. Hitachi, Antonelli Terry Stout & Kraus, July 24, 2001: US06266072 (51 worldwide citation)

A graphics system which accelerates generation of pixels including transparent objects by simply adding more rendering devices. The system has composition means and a plurality of rendering devices each comprising a geometric processor, a rendering processor and a frame memory that holds color, dept ...

Tetsuya Shimomura, Shigeru Matsuo, Koyo Katsura, Tatsuki Inuzuka, Yasuhiro Nakatsuka: Data processor having unified memory architecture providing priority memory access. Hitachi, Antonelli Terry Stout & Kraus, December 25, 2001: US06333745 (49 worldwide citation)

In order to reduce degradation of the processing performance of the data processor due to use of a part of the main memory as a display frame buffer, when an access request to the memory is generated from the CPU, the memory controller holds it once, requests the display controller to stop the acces ...

Koyo Katsura, Hideo Maejima, Hisashi Kajiwara: Graphic processing apparatus. Hitachi Engineering, Hitachi, Antonelli Terry & Wands, October 18, 1988: US04779210 (44 worldwide citation)

Herein disclosed is a graphic processing apparatus which uses a CRT of raster scanning type. The graphic processing apparatus has functions to compare and judge whether or not within the range of a predetermined region thereby to effect the drawing operation, to compare drawing picture element data ...

Koyo Katsura, Hideo Maejima, Hisashi Kajiwara: Graphic pattern processing apparatus. Hitachi, Hitachi Engineering, Antonelli Terry & Wands, August 29, 1989: US04862150 (43 worldwide citation)

A graphic pattern processing apparatus using a raster scan type CRT is disclosed. The graphic pattern processing apparatus can update one-pixel data, translate a logical address to a physical address and transfer data in a display memory, at a high speed. The graphic pattern processing apparatus com ...

Keiko Abe, Soshiro Kuzunuki, Koyo Katsura, Toshimi Yokota, Masaki Miura: Sentence processing apparatus and method thereof,utilizing dictionaries to interpolate elliptic characters or symbols. Hitachi, Antonelli Terry Stout & Kraus, January 9, 2001: US06173253 (35 worldwide citation)

A document or sentence processing apparatus having an input unit for inputting characters, a display unit for displaying input characters and a processing unit for converting and editing the input characters, in which the processing unit has a candidate word extraction unit which extracts candidates ...

Keiko Gunji, Koyo Katsura, Soshiro Kuzunuki, Masaki Miura, Toshimi Yokota: Apparatus for recognizing input character strings by inference. Hitachi, Antonelli Terry Stout & Kraus, June 15, 2004: US06751605 (32 worldwide citation)

A character recognition apparatus for inferring the entire character string solely from a user-input handwritten keyword and displaying the inferred result as a candidate character string.