Abstract: A tactile graphic display comprises an array of pin assemblies that can be individually activated to rise a selective distance above a plane, taking the shape of 3D objects and text in essentially real time. Each pin assembly of the array is operatively coupled to a permanent magnet that is slidable within an electromagnetic coil. When current is applied in a first direction to the coil, the magnet is repelled by the coil, causing it to move upwards and thus causing the pin to project from the array. When current is applied to the coil in the opposite direction, the magnet is attracted to the coil and moves downward, causing the pin assembly to retreat from the array. A latch member is configured to selectively engage and disengage a surface feature on the pin assembly for locking and unlocking a position of the pin assembly relative to the frame.