| 摘要 |
FIELD: physics. ^ SUBSTANCE: device is such that each key of the multifunctional keyboard is divided into opaque sections through which the bottom parts of which light-emitting diodes are threaded, said light-emitting diodes being electrically connected into groups of simultaneously illuminating light-emitting diodes, and the top part of each section has inner grooves into which replaceable translucent colour slides are inserted, said slides having the necessary opaque symbols deposited on them; semiconductor screens are worn on top on open parts of each key to project onto them from downwards symbols displayed on the slides illuminated by the illuminating light-emitting diodes of the selected sections of the keys. ^ EFFECT: multifunctionality of the keyboard. ^ 2 dwg |
