A single photon generating apparatus includes an optical waveguide, an active medium section and a resonator section. In particular, the plurality of particles is utilized for the oral delivery of a pharmaceutical to a subject via the drinking device. An input arbitration logic circuit may schedule timeslots within the encryption cores to maximize system bandwidth. The upper and lower blade edge lines also coincide with the planned cut line of the corner section of the plate glass. The internet video and the television video may be swapped between the PIP area and the main area of the display, and the speaker of the web television may be swapped between the internet audio and the television audio. The control unit includes a state judgment portion that judges whether or not the synchronization with the another projector is stable and a number determination portion that determines the number of transmitters to be used among the plurality of transmitters based on the judgment result made by the state judgment portion.