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US4811281A Expired / Lapsed US ⏱️ 0.0 years remaining

Work station dealing with image data

Assignee: Mitsubishi Electric Corp
•
Filing: 1987-02-19
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Granted: 1989-03-07
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Expires: 2007-02-19
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Abstract

Abstract A work station of a computer system capable of batch storing and retrieving image data separately from a usual data file system, equipped with a main processor, main processor memory and direct memory access (DMA) controller connected to a common bus, equipped with a graphic processor and window memory between the common bus and an image data bus, and equipped with a frame memory in connection with an image display unit on the image data bus, wherein the work station is further provided with an image data memory, e.g., disk unit, on the image data bus, a memory input/output controller lcoated between the image data memory and the image data bus for controlling image data transfer using a direct memory access (DMA) function, and an image data input unit and output unit connected to the memory input/output controller, so that mass image data can be transferred directly between the memory and input/output units under control of the memory input/output controller without going through the window memory.

Inventors

  • 👤 Takashi Okamoto
  • 👤 Akio Terasawa
  • 👤 Takashi Ishizaki

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 19:04
CPC Classifications
G; G06; G06T; G06T17/00; G09; G09G; G09G5/00; G09G5/36; G09G5/363

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 171 words
A work station for processing image data having a main processor, a main processor memory and a direct memory access (DMA) controller all connected to a common bus, a graphic processor and a window memory each connected between said common bus and an image data bus, and a frame memory having an image display unit and being connected to said image data bus, said work station comprising: image data memory means for storing image data, said image data memory means being connected to said image data bus; memory input/output control means provided between said image data bus and said image data memory means for processing image data stored in said image data memory means using a direct memory access (DMA) function; and image data input means and image data output means connected to said memory input/output control means; said image data output means outputting image data transferred by said memory input/output control means, and said image data input means inputting image data to be stored through said memory input/output control means.
Claim 2
Dependent Claim 171 words
A work station for processing image data having a main processor, a main processor memory and a direct memory access (DMA) controller all connected to a common bus, a graphic processor and a window memory each connected between said common bus and an image data bus, and a frame memory having an image display unit and being connected to said image data bus, said work station comprising: image data memory means for storing image data, said image data memory means being connected to said image data bus; memory input/output control means provided between said image data bus and said image data memory means for processing image data stored in said image data memory means using a direct memory access (DMA) function; and image data input means and image data output means connected to said memory input/output control means; said image data output means outputting image data transferred by said memory input/output control means, and said image data input means inputting image data to be stored through said memory input/output control means.
Claim 3
Dependent Claim 42 words
A work station according to claim 1, wherein said common bus is connected with a data memory means for storing data other than said image data, said common bus being connected with a memory control means for controlling said data memory means.
Claim 4
Dependent Claim 27 words
A work station according to claim 1, wherein said graphic processor comprises a graphic control unit, which includes an input unit for operation of said work station.
Claim 5
Dependent Claim 22 words
A work station according to claim 1, wherein said image display unit connected to said frame memory comprises a bit-map display unit.
Claim 6
Dependent Claim 18 words
A work station according to claim 1, wherein said image data memory means comprises a magnetic disk unit.

References Cited (Backward Citations)

US4070710A Cited
US4558412A Cited
US4620289A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-03-06 1992-09-05 1993-03-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-03-06 1996-09-05 1997-03-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-03-06 2000-09-05 2001-03-07 $7700.00 Window Closed / Lapsed

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