A controlling device, such as a universal remote control, that uses visual and/or audio cues, such as sounds, color, patterns, shapes, etc., to indicate a relationship between a function key and an intended target appliance for a command transmitted in response to activation of the function key....http://www.google.ca/patents/US8049655?utm_source=gb-gplus-sharePatent US8049655 - Controlling device using visual cues to indicate appliance and function key relationships
