Raster display refresh system

Details Raster display refresh system Raster display refresh system

1979-03-15

1980-11-04

Fears, Terrell W.

Static information storage and retrieval

Read/write circuit

Data refresh

358140, 340750, 340798, G11C 1300

Patent

active

042323762

ABSTRACT:
A raster display refresh system includes a charge coupled device (CCD) circulating refresh memory for maintaining a display of information on a cathode ray tube (CRT) screen. The X and Y address of picture elements to be changed are stored in raster scan sequence in a small random access memory (RAM). Whenever a picture element address in the data register of the RAM equals the X and Y screen address of the scanning beam of the CRT, a corresponding new picture element signal stored in the RAM is substituted for the old picture element signal previously circulating the CCD refresh memory.

REFERENCES:
patent: 3396377 (1968-08-01), Strout

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