| 摘要 |
The invention relates to electronics and computer engineering and can be used in data input devices. It addresses the technical problem of creating a keyboard on which one full-size symbol from among a large set of symbols is displayed on the entire surface of a key and is uniformly illuminated over its entire surface, and one film bearing a set of symbols can easily be substituted by another. The claimed illuminated multi-symbol keyboard comprises a body having buttons disposed therein which are provided with corresponding displacement and switching mechanisms and are connected to a control circuit which switches, inter alia, light emitters situated beneath each button, the light from said emitters passing via a replaceable film with a plurality of symbol images beneath each button to the surface of the button. The novel feature of the keyboard is that the light emitters are arranged in such a way that when one of the emitters is switched on, a corresponding symbol image is projected onto the entire semi-transparent top surface of the button and when a different emitter is switched on, a different corresponding image replaces the preceding one on the entire surface of the same button.
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