Controller for CRT display apparatus

Details Controller for CRT display apparatus Controller for CRT display apparatus

1987-10-02

1989-06-06

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358111, 358140, 358153, H04N 5262, H04N 508

Patent

active

048376264

ABSTRACT:
A controller for a CRT display apparatus which is capable of displaying an image selectively either in an interlace mode or in a non-interlace mode and which has a function for displaying the image in raster erase mode. The controller has a field detection circuit capable of judging whether the present mode is the interlace mode or the non-interlace mode, and a mode setting circuit allowing the CRT display apparatus to display the image in the raster erase mode which is changed so as to match the interlace display mode or in the non-interlace display mode switched over therebetween in accordance with the result of judgment conducted by said field detection circuit. In consequence, raster erase matching with the selected display mode can be selected and effected automatically.

REFERENCES:
patent: 4644395 (1987-02-01), Itou et al.
patent: 4698674 (1987-10-01), Bloom
patent: 4719644 (1988-01-01), Herzog et al.

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