Computer graphics processing and selective visual display system – Plural display systems – Remotely located
Reexamination Certificate
1995-02-16
2001-08-14
Lee, Michael (Department: 2714)
Computer graphics processing and selective visual display system
Plural display systems
Remotely located
C345S215000, C345S215000
Reexamination Certificate
active
06275199
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method and apparatus for displaying image and facsimile data on a non-programmable-terminal (NPT) attached to a host computer for host-based applications, and more particularly to both user set-up and host-based application control of background and foreground color of an image and facsimile data display on a NPT.
2. Description of the Prior Art
Known implementations for displaying image and facsimile (fax) data require a programmable work station (PWS) as the presentation device. A PWS is a work station capable of running local PWS applications. The PWS solution is relatively expensive and requires significant support.
Non-programmable-terminals (NPTs) are significantly less expensive than the PWS; however, known NPTs do not support the display image or facsimile data. Typically NPTs are non-graphical, character-based terminals. NPTs are attached to a host computer, such as an IBM AS/400, via a twinaxial cable. The NPTs require the support of a workstation controller (WSC) for keystroke handling, screen/field management, and the like. Known NPTs display alphanumeric text of host-based applications.
A need exists for integrating the display of image and fax data into the existing style of host-based applications and to eliminate the exclusive need for a programmable work station for displaying image and fax data. It is highly desirable to provide both host application and user control of the background and foreground color of an image and facsimile data display on a NPT. With a bi-level monochrome viewing, typically an image has white background and black foreground. It is desirable to provide user control of the background and foreground color of a display with a bi-level monochrome image implementation to enable user selected contrast image contrast. Also it is desirable to provide application control of the background and foreground color of a display to convey additional information to the end user with the use of color.
SUMMARY OF THE INVENTION
It is a principal object of the present invention to provide a method and apparatus for displaying image and facsimile data on a non-programmable-terminal (NPT) attached to a host computer and for controlling foreground and background color of the displayed image and facsimile data. Other important objects of the present invention are to provide a method and apparatus enabling a host-based application display of image and facsimile data, to provide such method and apparatus capable of efficient and effective operation and that overcomes many of the disadvantages of prior art arrangements.
In brief, the objects and advantages of the present invention are achieved by a method and apparatus for displaying image and facsimile data on a host-based application display. A host computer generates control and download command data for displaying the image or facsimile data. The image and facsimile data are processed by a non-programmable-terminal (NPT) or a programmable work station (PWS) for presentation of a display screen. When a user requests another function, the NPT or PWS stores image information and sends save image information to the host computer. The save image information includes cache image counter data, scaling and viewed image screen location data that is used to restore the displayed image and facsimile data when the user returns to the previous function. Both the user and host application can specify a foreground color and a background color for the image and facsimile data display.
REFERENCES:
patent: 4791556 (1988-12-01), Vilkatis
patent: 4837710 (1989-06-01), Zelinsky et al.
patent: 4920514 (1990-04-01), Aoki
patent: 5072412 (1991-12-01), Henderson, Jr. et al.
patent: 5165012 (1992-11-01), Crandall et al.
patent: 5530961 (1996-06-01), Janay et al.
IBM Technical Disclosure Bulletin, vol. 31, No. 7, Dec. 1988 Graham, Gregg and Sheppard, pp. 346-350, “Routable Soft Panel.”
IBM 3164 ASCII Color Display Station Description, pp. 5-64 and 5-65.
Aaker Kenneth Dale
Amell Steven Joseph
Behrens Louis Edward
Culbertson Bruce Richard
Kiel Harvey Gene
International Business Machines - Corporation
Lee Michael
Pennington Joan
Truelson Roy W.
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