公开(公告)号：GB2521831A

公开(公告)日：2015-07-08

申请号：GB201400012

申请日：2014-01-02

Applicant: NOKIA TECHNOLOGIES OY

Inventor： JARVENPAA TONI ,  REPONEN ERIKA PIIA PAULIINA ,  LUCERO ANDRÃ S ,  VETEK AKOS

IPC: G02B27/01 ,  G02B27/09

Abstract: An internal optical projection element 22 is configured to project light 23 internally towards an eye 2of a user of the apparatus. An external optical projection element 32 is configured to project light 33 externally away from an eye of the user. One or more optical engines 20 are configured to provide light to the internal and external optical projection elements. The apparatus may be a see-through head mounted display (HMD) or near-eye device (NED) The externally projected light may be an alert or warning to third parties when a user of the apparatus is recording information. A light guide (5, figure 2) may be used to transfer light from the optical engine 20 to optical projection elements (32, 22, figure 2).