| 摘要 |
PROBLEM TO BE SOLVED: To obtain a keyboard device which has a pitch and specific key recognized with simple constitution. SOLUTION: A display unit 10 consists of a base body 11, etc., and a display panel 12 and is constituted by every octave. The display panel 12 consists of a pitch display section 12a and an instructed key display section 12b. A translucent pitch notation for one octave is attached to the pitch display section 12a. When an LED 14 emits light, irradiation light transmits the portion of the pitch notation corresponding thereto and the pitch is recognized by a player (pitch display). On the other hand, the reflected light from the LED 14 and the reflection surface 11a of the base body 11 transmits the transparent part (12b') of the instructed key display section 12b and the player recognizes the key (instructed key) corresponding to the LED 14 made to emit light mainly by the reflected light from the reflection surface 11a (specific key recognition). |
