US5479224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image display apparatus
Assignee: Olympus Corp
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Filing: 1993-12-22
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Granted: 1995-12-26
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Expires: 2013-12-22
Abstract
Abstract A head-mounted display apparatus wherein an image displayed on an image display device is projected on an observer's eyeball, which is designed so that the displayed image can be observed at a desired angle of view and at a desired magnification by making the projection magnification changeable. The head-mounted image display apparatus includes an image display device (11) for displaying an image, and a projection optical system for projecting the image displayed on the image display device (11) onto an observer's eyeball. The projection optical system is composed of a first relay optical system (12), a second relay optical system (13), and an ocular optical system (14). The second relay optical system (13), which is an afocal optical system, is rotatable about an axis (16) perpendicular to the optical axis so that the projection magnification is changed in three steps by the rotation of the second relay optical system (13).
Inventors
- 👤 Masato Yasugaki
- 👤 Osamu Konuma
- 👤 Kumi Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:47
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/017; G02B27/0172; G02B27/0101; G02B2027/0132; G02B27/0149; G02B2027/0154; G02B2027/0156; G02B2027/0161; G02B2027/0178
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
An image display apparatus comprising: an image display device for displaying an image, and a projection optical system for projecting the image displayed on said image display device onto an observer's eyeball, wherein at least a part of said projection optical system is rotatable about an axis perpendicular to an optical axis, wherein rotation of at least said part of said projection optical system occurs in units of 90° so that projection magnification is changed by said rotation of at least said part of said projection optical system.
Claim 2
Dependent Claim
88 words
An image display apparatus comprising: an image display device for displaying an image, and a projection optical system for projecting the image displayed on said image display device onto an observer's eyeball, wherein at least a part of said projection optical system is rotatable about an axis perpendicular to an optical axis, wherein rotation of at least said part of said projection optical system occurs in units of 90° so that projection magnification is changed by said rotation of at least said part of said projection optical system.
Claim 3
Dependent Claim
87 words
An image display apparatus comprising: an image display device for displaying an image, and a projection optical system for projecting the image displayed on said image display device onto an observer's eyeball, wherein at least a part of said projection optical system is rotatable about an axis perpendicular to an optical axis so that projection magnification is changed by said rotation of at least said .part of said projection optical system, and wherein at least said part of said projection optical system is an afocal optical system.
Claim 4
Dependent Claim
87 words
An image display apparatus comprising: an image display device for displaying an image, and a projection optical system for projecting the image displayed on said image display device onto an observer's eyeball, wherein at least a part of said projection optical system is rotatable about an axis perpendicular to an optical axis so that projection magnification is changed by said rotation of at least said .part of said projection optical system, and wherein at least said part of said projection optical system is an afocal optical system.
Claim 5
Dependent Claim
80 words
An image display apparatus comprising: an image display device for displaying an image, and a projection optical system for projecting the image displayed on said image display, device onto an observer's eyeball, wherein at least a part of said projection optical system is automatically rotated according to a variable aspect ratio to change projection magnification so that said image display device can project an image with an aspect ratio varied from that of the displayed image on the observer's eyeball.
Claim 6
Dependent Claim
80 words
An image display apparatus comprising: an image display device for displaying an image, and a projection optical system for projecting the image displayed on said image display, device onto an observer's eyeball, wherein at least a part of said projection optical system is automatically rotated according to a variable aspect ratio to change projection magnification so that said image display device can project an image with an aspect ratio varied from that of the displayed image on the observer's eyeball.
Claim 7
Dependent Claim
107 words
An image display apparatus comprising: an image display device for displaying an image, a projection optical system for projecting the image displayed on said image display device onto an observer's eyeball, and means for cancelling image distortion occurring in said projection optical system by correcting the image displayed on said image display device in accordance with a change in the image distortion occurring in said projection optical system, wherein at least a part of said projection optical system is rotatable about an axis perpendicular to an optical axis so that the projection magnification is changed by said rotation of the rotatable part of said projection optical system.
Claim 8
Dependent Claim
107 words
An image display apparatus comprising: an image display device for displaying an image, a projection optical system for projecting the image displayed on said image display device onto an observer's eyeball, and means for cancelling image distortion occurring in said projection optical system by correcting the image displayed on said image display device in accordance with a change in the image distortion occurring in said projection optical system, wherein at least a part of said projection optical system is rotatable about an axis perpendicular to an optical axis so that the projection magnification is changed by said rotation of the rotatable part of said projection optical system.
Claim 9
Dependent Claim
101 words
An image display apparatus comprising: an image display device for displaying an image, a projection optical system for projecting the image displayed on said image display device onto an observer's eyeball, and means for changing a view angle of an image for observation by displaying the image in a compressed form in part of a display area of said image display device, wherein at least a part of said projection optical system is rotatable about an axis perpendicular to an optical axis so that the projection magnification is changed by rotation of at least said part of said projection optical system.
Claim 10
Dependent Claim
101 words
An image display apparatus comprising: an image display device for displaying an image, a projection optical system for projecting the image displayed on said image display device onto an observer's eyeball, and means for changing a view angle of an image for observation by displaying the image in a compressed form in part of a display area of said image display device, wherein at least a part of said projection optical system is rotatable about an axis perpendicular to an optical axis so that the projection magnification is changed by rotation of at least said part of said projection optical system.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |