| 摘要 |
PROBLEM TO BE SOLVED: To provide a button for an electronic apparatus having a good operational property. SOLUTION: Numeral patterns 21 in red, kana letter patterns 31 in green and alphabetical character patterms 41 in black are printed on a key top 11 as plural kinds of patterns. Red, green and orange back light colors are obtained by selectively causing red LED 51 and a green LED 5 to emit light as light sources of the back light. The lighted color of the back light is controlled according to the color of the pattern used by a mode.
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