A signal transmission device has a parallel/serial conversion section which converts a plurality of first parallel signals into at least one line of serial signals, the first parallel signals being output in parallel and in synchronization; and one or more serial transmission lines which transmit the serial signals converted by the parallel/serial conversion section.

 
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> Light source apparatus, its manufacturing method and apparatus, reflector focal position-locating method and apparatus, focal position-locating light source, discharge lamp emission position-locating method and apparatus, and discharge lamp-reflector positioning method and apparatus
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