Control method of zooming screen

Details Control method of zooming screen Control method of zooming screen

1989-02-02

1991-12-17

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340724, 340731, G09G 106

Patent

active

050737716

ABSTRACT:
A display device which has a zooming function and is required to display a logical screen larger in size than a physical screen, is operated in the following manner. When an action for indicating a zooming command is taken, a first rectangular frame similar in shape to the logical screen, a second rectangular frame similar in shape to a logical area which is now displayed on the physical screen, and a third rectangular frame similar in shape to a logical area which is to be subjected to a zooming operation, are all displayed on the physical screen, and moreover the third rectangular frame can be moved to a desired position by means of a coordinate input device such as a mouse. Hence, the zooming operation and a desired logical area corresponding to the third rectangular frame placed at the desired position can be specified by a one-touch operation. Thus, the operation procedure becomes simple, and the operability of the display device is improved.

REFERENCES:
patent: 4546349 (1985-10-01), Prohofsky et al.
patent: 4642790 (1987-02-01), Minshull et al.
patent: 4786897 (1988-11-01), Takanashi et al.
patent: 4829294 (1989-05-01), Iwami et al.
Foley, "Fundamentals of Interactive Computer Graphics", Addison-Wesley Publishing Co., Reading, Mass., pp. 234-237, 1984.

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