Raster scan image data display controller including means for re

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

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340732, 340733, 358152, G09G 100

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047885408

ABSTRACT:
A raster scan image data display controller including a means for reducing flickering comprises an image memory for storing image data items at horizontal and vertical display addresses corresponding to horizontal and vertical coordinates on an image display area, a read-out device for supplying the horizontal and vertical display addresses to the image memory and reading out the image data items from the image memory, a display device for interlaced displaying of the read-out image data on paired scanning lines of two types of fields which are to be formed by a raster scan, a timing control device for synchronizing the horizontal and vertical display addresses with the raster scan of the display device, and a timing switching device for permitting said paired scanning lines of two types of fields formed by the raster scan in association with a timing control by the timing control device, to be switched, so as to select a pair of scanning lines which are situated close to each other.

REFERENCES:
patent: 4445114 (1984-04-01), Stubben
patent: 4608602 (1986-08-01), Grantham-Hill
patent: 4649378 (1987-03-01), Johnson et al.

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