| 摘要 |
The invention provides a device having a light transmission device wherein a light-emitting element, a driving circuit for driving this light-emitting element, a light-receiving element (light-detecting element), a light-guiding path (wave-guiding path) for guiding light from the light-emitting element to the light-receiving element, an amplifying circuit, wiring and a circuit are successively provided on a substrate. The light from the light-emitting element passes through the light-guiding path and is received at the light-receiving element, transferring photoelectricity. The electric signals from the light-receiving element are amplified at the amplifying circuit and are input to the circuit through the wiring. The circuit operates based on these electric signals.
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