Patent ID: 7784945
Filing Date: 2010-08-31
Classification: G02B

Abstract:
1. A display apparatus, comprising: a light outputting unit configured to output a visible beam to irradiate an eyeball with and an infrared beam to irradiate an eyelid with; a deflection unit configured to deflect, toward eyes of a user, the visible beam and the infrared beam outputted from said light outputting unit; a light sensing unit configured to sense reflected light of the visible beam that has been reflected off an eyeball of the user; an eyelid opening and closing judgment unit configured to judge whether eyelids of the user are in an open or closed state, based on a result of the reflected light sensing performed by said light sensing unit; and an infrared-irradiation range control unit configured to change an irradiation range of the infrared beam so that the eyelids are selectively irradiated with the infrared beam, by controlling said light outputting unit according to the open or closed state of the eyelids judged by said eyelid opening and closing judgment unit.