Image display apparatus having a plurality of displays

Details Image display apparatus having a plurality of displays Image display apparatus having a plurality of displays

1988-01-15

1989-07-04

Yusko, Donald J.

Communications: electrical

Land vehicle alarms or indicators

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

340799, 340744, G09G 116

Patent

active

048454800

ABSTRACT:
In an image display apparatus, a frame memory for storing original data and a plurality of display memories for storing data to be displayed are used as memories for storing image data. Data transfer from the frame memory to the display memories is performed in accordance with a DMA scheme. The display memories as destinations of the data transfer are selectively switched. Since the image data transfer from the display memories is performed through a programmable data conversion memory, data conversion as image processing can be performed. The image data is read out from each of the display memories and is displayed on each of a plurality of display systems. An address signal for reading out at least a desired part of the image data from the frame memory is generated in synchronism with a common sync signal used when the image data is read out from the display memories.

REFERENCES:
patent: 3961324 (1976-06-01), Cousin et al.
patent: 4069511 (1978-01-01), Lelke
patent: 4205389 (1980-05-01), Heartz
patent: 4356482 (1982-10-01), Oguchi
patent: 4364090 (1982-12-01), Wendland
patent: 4573080 (1986-02-01), Maze
patent: 4769640 (1988-09-01), Sato

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