My first "Big Screen" TV was exactly that. A very large lens that weighed about 13 pounds and was about 8 inches in diameter. It just sat in a BOX about 15 inches away from the 13 inch TV screen. When i turned the tv brightness all the way up... and turned ALL the lights in the room OFF... i had a GIANT picture (about 4 feet across) on a special curved screen. I thought it was so cool. You can make one in 2 minutes. Just hold a large magnifier lens in front of any bright monitor screen. It will project the image a few feet away in a DARK room The image will be UPSIDE DOWN. This can be corrected by turning the monitor upside down, or by reversing the wiring in the picture tubes "deflection yoke".
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You could just as you can project any illuminated picture with a suitable lens BUT It won't be very bright It will nee a BIG lens that may well be expensive.
Back when they were a serious experimenter's supply house (which they stopped being several decades ago, alas), Edmund Scientific had some surplus lens assemblies from CRT-based video projectors, which -- as Rick says -- could be used to get a fairly dim projection from an ordinary display. (They were originally intended for use with separate R, G, and B tubes, each running brighter than a normal monitor.) I think the lenses were something like eight to ten inches in diameter, held in a tube a foot or so long. Other than that... No.