Short throw projectors
by comparison mount less than half the distance back. For screen sizes of 100” or smaller, they can usually be mounted on a telescoping arm, on a wall mount placed only inches above the screen, but telescoping to 40 or more inches.
Thanks to the telescoping mounts, these short throw projectors mount directly above the screen which makes wiring is a breeze by comparison to standard throw projectors. Limitations include maximum screen size. 100” screens are about as large many short throw projectors can handle from those mounts.