Abstract: A free-standing or hanging knock-down-type modular display apparatus embodies a plurality of display panel-supporting frames hingedly interconnected side-to-side by one or more flexible and detachable unitary hinge-connectors allowing adjacent frames to be incrementally folded about a vertical axis. The adjacent frames have side-rails, each such rail having an outer peripheral face with openings into which the hinge-connectors may be inserted and detachably engaged. The hinge-connectors comprise a flexible central portion operatively extending between adjacent frames, i.e., from the outer peripheral face of a first frame side-rail, across a connective region between the frames, and into the outer peripheral face of a second adjacent frame side-rail.