Method of electronically moving portions of several different im

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...

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340721, 340747, 340750, G09G 100

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active

045595330

ABSTRACT:
A method of electronically moving portions of several different images on a CRT screen includes the steps of: storing a first image in one section of an image memory, and storing a second image in a different section of the image memory; storing control bits in a control memory which define high and low priority viewports on the screen and correlate portions of the first and second images to the high and low priority viewports respectively; displaying, in response to the stored control bits, the entire portion of the image in the high priority viewport and only the non-overlapping portion of the image in the low priority viewport by transferring the image portions from the image memory to the screen with no frame buffer therebetween; modifying at least some of the stored control bits to change the priorities of the high and low priority viewports to low and high respectively; and repeating the displaying step, in response to the modified control bits, to display the entire portion of the image in the new high priority viewport and only the non-overlapping portion of the image in the new low priority viewport.

REFERENCES:
patent: 4197590 (1980-04-01), Sukonick et al.
patent: 4200869 (1980-04-01), Murayama et al.
patent: 4414628 (1983-11-01), Ahuja et al.
patent: 4439760 (1984-03-01), Fleming
patent: 4470042 (1984-09-01), Barnica et al.
patent: 4484187 (1984-11-01), Brown et al.

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