Metal keyboard for operating e.g. kiosk system, has variable illuminant retainer, and illuminant controlled by associated computer and used for prompting and/or for maintenance of user and/or for displaying operating conditions

摘要

The metal keyboard (1) has a variable illuminant retainer, and an illuminant (3) e.g. light emitting diode (LED), controlled by an associated computer. The illuminant is used for prompting and/or for maintenance of a user and/or for displaying operating conditions e.g. free or chargeable usage.