| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To surely illuminate a key top at a low power consumption rate and without disturbing people nearby, in relation to a key top, a key top lighting system and an electronic apparatus capable of improving operability in the dark. <P>SOLUTION: Transparent fluorescent ink 3 emitting fluorescent light upon being irradiated by light having a wavelength of 300-450 nm is printed on the key top 1, and the key top is irradiated with a black light ray 7 from a black light lamp 6A, so that the operability of the key top 1 can be improved in the dark. <P>COPYRIGHT: (C)2004,JPO</p> |
