To provide an optical DVI (digital visual interface) cable which does not cause a destruction of an input output device even if there arises a potential difference between an internal power source and an external power source in a combination type of the internal power feed type and an external power feed type. 内部給電方式と外部給電方式の兼用タイプにおいて、内部電源と外部電源との間で電位差が生じることがあっても、入出力装置の破壊を招かない光DVIケーブルを得る。 - 特許庁