Embodiments of the present invention relate to integrated modular display systems. In one embodiment, a modular multi-panel display system includes a mechanical support structure, and a plurality of display panels detachably mounted to the mechanical support structure so as to form an integrated display panel. Each LED panel includes an LED array and an LED driver coupled to the LED array. Each panel further includes a power supply unit disposed outside the housing and electrically coupled to the receiver circuit. The mechanical structure is configured to provide mechanical support to the plurality of display panels without providing hermetic sealing. Each of the plurality of display panels is hermetically sealed.