Some embodiments of the present invention provide an apparatus and method
adapted to control or assist the movement of a display screen relative to
a screen housing. In some embodiments, a linkage assembly is adapted to
move a display screen relative to a screen housing. Also, some
embodiments employ a hub movable within an elongated aperture, and can
also have a projection engaged with a second elongated aperture to help
control the orientation of the display screen relative to the screen
housing. Some embodiments according to the present invention employ lift
devices, lock devices, and other display control devices, such as
clutches and friction assemblies.