| 摘要 |
An electric apparatus is adapted to display a plurality of key symbols on a single passive display. A keyboard includes a plurality of input keys for selectively inputting at least numeral data and function data and input keys operated to selectively display key symbols representing numerals, functions, etc. A single passive liquid crystal display is arranged below the keyboard. A plurality of electrodes are arranged on the predetermined areas of the single passive display and the key symbols corresponding to the functions are selectively displayed, by a key operation, on the electrodes.
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