Adding the dimension of color to computer-generated displays

A low-cost system that permits existing computer-generated displays on a black and white CRT display to be reproduced in one of several colors on a color TV receiver is described. A black and white TV camera monitors the computer display, and the camera RF signal is sent to the color TV receiver, which has its three color guns under computer control through an interface unit described herein. In a simple on or off arrangement using three computer output relays, seven distinct and readily identifiable colors are available. With the use of D/A converters, the interface unit is voltage controlled, permitting both faster control and many more hues to be obtained.