| 摘要 |
A conventional technology to make voices come out of various message cards is applied to Christmas cards and various invitation cards with small visual changes and effects. According to the present invention, a UV coloring card comprises: a first display part formed with letters and designs which are colored to become visible when applied with UV rays instead of visible rays; a UV rays emitting unit to emit UV rays to the first display part; a power source part to supply power to the UV rays emitting unit; and a light-emitting switch to turn on or off power supply from the power source part to the UV rays emitting unit. The UV coloring card makes the designs on the first display part, which has been non-visible so far, become visible, thereby giving visual impressions. |
