HEAD-MOUNT OR HEAD-UP TYPE LIGHT GUIDE MEMBER FOR USE IN DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To enable an observer to view an image generated from a micro display device without being interested in a background itself. SOLUTION: A head-mount or head-up type light guide member for use in the display device comprises a body 22 of the light guide member the part of which has transparency with respect to visible light and a coupling member 24 designed to couple the body 22 to an optical system 18 connected with the body 22 and designed to generate the image. Also, the light guide member is provided with a coupling member 24 arranged so that the light beam from the optical system 18 propagates in the body 22 by total internal reflection, and an image fetching diffraction grating 28 designed such that the light beam propagating in the body 22 can be taken out so that the observer can view the image taken out in a transparent background by the body 22. COPYRIGHT: (C)2004,JPO