HEAD-MOUNTEABLE APPARATUS DETECTING CABLE TANGLE

摘要

A head-mountable apparatus (20) comprises a frame which is configured to be mounted on a user's head, the frame supporting one or more electrical and/or optical devices (122); a cable (82), (84) connecting the one or more electrical and/or optical devices to an external device (300) separate to the head-mountable apparatus (20); and a detector for detecting head movements of a magnitude which, assuming a substantially stationary external device, may cause the cable (82), (84) to become at least partially wrapped around the user's body.