Patent US5790284A successfully refreshed from Google Patents.
US5790284A
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Display apparatus and displaying method for image display producing stereoscopic effect
Assignee: Canon Inc
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Filing: 1996-11-14
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Granted: 1998-08-04
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Expires: 2016-11-14
Abstract
Abstract This specification discloses a displaying apparatus having a display emitting light, and an optical element formed by two holograms each having optical power and partially overlapping each other. The light from the display is diffracted by one of the holograms to be directed to an observer's left pupil, and is diffracted by the other hologram to be directed to the observer's right pupil.
Inventors
- 👤 Naosato Taniguchi
- 👤 Susumu Matsumura
- 👤 Yoko Yoshinaga
- 👤 Shin Kobayashi
- 👤 Toshiyuki Sudo
- 👤 Hideki Morishima
- 👤 Tadashi Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:14
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/32; G02B27/00; G02B27/01; G02B27/017; G02B27/0172; G02B30/00; G02B30/20; G02B30/34; G02B30/35; G03; G03H; G03H1/00; G03H1/26; G02B27/0101; G02B2027/011; G02B2027/0132; G02B2027/0136; G02B2027/0174; H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7441; H04N5/7475; H04N5/7491
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
A displaying apparatus comprising: a plurality of displays emitting light; an optical system; said optical system having holograms whose numbers are the same as numbers of said displays; said holograms respectively having mutually different optical powers and making light from the corresponding display incident on a pupil of observer, so that virtual images to be formed at different positions in a depth direction of viewfield of said observer are made to be observed by said observer; and controlling means for controlling a display image to be displayed on each of said displays and timing for the display.
Claim 2
Dependent Claim
97 words
A displaying apparatus comprising: a plurality of displays emitting light; an optical system; said optical system having holograms whose numbers are the same as numbers of said displays; said holograms respectively having mutually different optical powers and making light from the corresponding display incident on a pupil of observer, so that virtual images to be formed at different positions in a depth direction of viewfield of said observer are made to be observed by said observer; and controlling means for controlling a display image to be displayed on each of said displays and timing for the display.
Claim 3
Dependent Claim
22 words
An apparatus according to claim 1, wherein said controlling means makes said observer alternatively observe said virtual images at said different positions.
Claim 4
Dependent Claim
22 words
An apparatus according to claim 2, wherein said controlling means controls time for making said observer observe one of said virtual images.
Claim 5
Dependent Claim
23 words
An apparatus according to claim 1, wherein said display apparatus is provided, corresponding to each of left and right pupils of said observer.
Claim 6
Dependent Claim
31 words
An apparatus according to claim 4, said apparatus having means for controlling an angle made by optical axes of two optical systems corresponding to left and right pupils of said observer.
Claim 7
Dependent Claim
93 words
A displaying method comprising: the step of providing a plurality of displays emitting light and holograms whose numbers are the same as numbers of said displays, said holograms having mutually different optical powers; the step of making light from the corresponding display incident on a pupil of an observer to make said observer observe a virtual image to be formed at different positions in depth direction of viewfield of said observer; and the step of controlling a display image to be displayed by each of said displays and a timing for the display.
Claim 8
Dependent Claim
93 words
A displaying method comprising: the step of providing a plurality of displays emitting light and holograms whose numbers are the same as numbers of said displays, said holograms having mutually different optical powers; the step of making light from the corresponding display incident on a pupil of an observer to make said observer observe a virtual image to be formed at different positions in depth direction of viewfield of said observer; and the step of controlling a display image to be displayed by each of said displays and a timing for the display.
Claim 9
Dependent Claim
24 words
A method according to claim 6, said controlling step having the step for making said observer alternatively observe said virtual images at different positions.
Claim 10
Dependent Claim
27 words
A method according to claim 7, wherein said controlling step has a step for controlling a time for making said observer observe one of said virtual images.
Claim 11
Dependent Claim
47 words
A method according to claim 6 wherein said display apparatus is provided, corresponding to each of left and right pupils of said observer having: the step of controlling an angle made by optical axes of two optical systems corresponding to left and right pupils of said observer.
References Cited (Backward Citations)
US4647142A
Cited
US5037166A
Cited
US5187597A
Cited
US5187597B1
Cited
JPH04248583A
Cited
US5396349A
Cited
US5198895A
Cited
US5461499A
Cited
US5589956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-03 | 2002-02-02 | 2002-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-03 | 2006-02-02 | 2006-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-03 | 2010-02-02 | 2010-08-04 | $7700.00 | Window Closed / Lapsed |