If your deck or patio is partially covered, drape lengths of fabric or canvas between the joists to create shade. Space out the pieces of fabric for a more transparent look, and add lights to illuminate the space at night.
A branch screen. remember idea: branch screens, built in planter boxes on rolling casters. Creates a moveable screen, with independent ivy growth-bonus boints for creating hinged, double screen frames that will collapse for moving or customizable sizes