Light field display system based digital signage system

A light field (LF) display system comprising:

• a controller configured to generate holographic content;
• a LF display assembly comprising one or more LF display modules that are configured to present the holographic content in a holographic object volume to a viewer located in a viewing volume in a public setting, and
• wherein each of the one or more LF display modules comprises:
• an energy device layer that is configured to provide a plurality of energy source locations;
• an energy waveguide layer with a plurality of energy waveguides, with each waveguide configured to project energy from at least one energy source location into at least one specific direction from a display surface depending on the energy source location, in accordance with a four-dimensional light field function, to form a holographic object by focusing energy waves within the holographic object volume where the holographic object is located therein, whereby the viewer located within the viewing volume is able to focus the viewer's eyes on the holographic object
• wherein the holographic object comprises convergence of energy waves in the holographic object volume and are formed without rendering two-dimensional perspective images.