| US 7,495,836 B2 | ||
| Display device | ||
| Shoichi Yamazaki, Yokohama (Japan); and Takeshi Nishimura, Yokohama (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Oct. 30, 2007, as Appl. No. 11/928,518. | ||
| Application 11/928518 is a division of application No. 11/766294, filed on Jun. 21, 2007. | ||
| Application 11/766294 is a division of application No. 08/959285, filed on Oct. 24, 1997, granted, now 7,262,919. | ||
| Application 08/959285 is a continuation of application No. 08/478688, filed on Jun. 07, 1995, abandoned. | ||
| Claims priority of application No. 6-130301 (JP), filed on Jun. 13, 1994; application No. 6-204268 (JP), filed on Aug. 05, 1994; and application No. 6-336063 (JP), filed on Dec. 22, 1994. | ||
| Prior Publication US 2008/0094720 A1, Apr. 24, 2008 | ||
| Int. Cl. G02B 27/14 (2006.01) | ||
| U.S. Cl. 359—631 [359/633; 359/638] | 4 Claims |
| 1. A display apparatus comprising:
display means for forming image information; and
optical means for guiding light of said display means to an eye, said optical means including a concave mirror decentered
with respect to an optical axis of the eye and having different optical powers according to an azimuth angle and another surface
decentered with respect to the optical axis of the eye and having different optical powers according to an azimuth angle,
wherein when a paraxial curvature radius of a generatrix section of said concave mirror and a paraxial curvature radius of
a meridian section of said concave mirror are respectively defined by ry and rx, the relationship of |rx|<|ry| is satisfied.
|