Holographic Mobile Emitter

Well, it's Been established that holograms have a pseudo physical presence they can interact with things, therefore it seems to me that the emitter would have to absorb the energy and do something with it. Typical ways that excess energy is dissipated is either by light or heat. It could possibly be built with some kind of external heat sink, so the emitter could possibly shut down until it had dissipated enough heat to operate normally again?