US Patent 9810906 External user interface for head worn computing

An external user interface adapted to control a head-worn computer includes a housing with a mechanical attachment system adapted to secure the housing to a steering wheel of a vehicle, a programmable quick launch software application button mounted on the housing and adapted to activate a pre-designated software application on the head-worn computer, and a button mounted on the housing and adapted to remove all content from being displayed in the head-worn computer when activated.