| 摘要 |
<p>Provided is a signal input apparatus which can input a signal through multiple buttons by using one waveguide and multiple penetration members having different opacity with each other. The signal input apparatus includes: a plurality of buttons; a waveguide; an input device having a plurality of penetration members provided for each button such that the penetration members are disposed in a waveguide when the buttons are operated; a light source to irradiated light onto the input device; and a sensor to measure an intensity of light passing through the waveguide of the input device.</p> |
