UV-ILLUMINATED SYMBOLS FOR A USER DEVICE

摘要

A user device comprising a keypad or a keyboard comprising one or more buttons ( 135 ); one or more light guides ( 130 ); one or more ultraviolet light emitting elements ( 120 ); and at least one of one or more fluorescently painted symbols ( 140 ) or one or more fluorescent three-dimensional symbols ( 145 ), wherein the one or more ultraviolet light emitting elements are configured to expose ultraviolet light to the at least one of the one or more fluorescently painted symbols or the one or more fluorescent three-dimensional symbols via the one or more light guides.