Definitions for "Ceiling Mount"
It allows the projector to be placed on the ceiling so it can be the proper distance from the screen without interfering with seating and viewing.
This mount refers to mounting window covering brackets on the top of the window casing or ceiling.
Mounting a projector upside down to compensate for the distortion created by pointing up from a table to the screen. Popular in home theater and conference room installations. Requires that you invert the image.