| 摘要 |
PROBLEM TO BE SOLVED: To provide an easy to use user interface even in dim peripheral lighting. SOLUTION: A key on the user interface is provided with a key body (138) with a phosphorus surface and a practically opaque material layer (144). The practically opaque material layer (144) is provided with at least one inner side interface (146) delimiting an open range (148) in the shape of a predetermined character (136) and the phosphorous surface is covered by the open range (148) so that one part of the phosphorus surface in the shape of the predetermined character (136) is visible. COPYRIGHT: (C)2004,JPO
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