Patent ID: 8503085

Claim:
A head-mounted display for forming a virtual image at a first predetermined distance in front of a pair of eyes, comprising: a left eye unit and a right eye unit, each eye unit having an image module for generating an image and an optical system disposed at a second predetermined distance from the image module and towards a respective one of the pair of eyes for forming the virtual image at the first predetermined distance from the respective one of the pair of eyes by enlarging an image generated by the image module; and a main body to which the left eye unit and the right eye unit are connected, wherein portions of the main body to which the left eye unit and the right eye unit are connected are each inclined to sustain a predetermined tilt angle from a center of the main body, wherein each image module further includes: an image source for generating an image for forming a virtual image visible to a respective eye, and having a transmission section for allowing external light from an external light source to pass through the image source to allow the external light to be visible to the respective eye; a frame holder having an opening for inserting the image source thereon, the opening formed to expose the image source in a direction of a respective one of the pair of eyes; and a frame cover positioned between the external light source and the image source for covering a part of an exposed surface of the image source or an entire exposed surface of the image source, thereby defining an aperture for the transmission section of the image source through which the external light passes; wherein the optical system generates the virtual image having a size S based on a predetermined field of view (FOV) angle and a selected display distance D of the virtual image from each respective eye.