ELEVATOR BUTTON DEVICE USING OPTICAL AND ELECTRICAL FILTERS

摘要

PURPOSE: An elevator button using optical and electrical filters is provided to prevent malfunction even if light which is not discharged from the light source of a transmission unit is inputted to a receiving unit. CONSTITUTION: An elevator button(100) using optical and electrical filters comprises a light transmission unit, a light modulation unit, a light receiving unit(130), and a control unit. The light transmission unit is installed in one wall of a button housing(110) and emits visible light. The light modulation unit modulates the emitted visible light into light having specific frequency. The light receiving unit is installed in the other wall of the button housing and receives the modulated visible light. The light receiving unit has an optical filter, an optical detector, and an electrical filter.