Patent US4006291A successfully refreshed from Google Patents.
US4006291A
Expired / Lapsed
US
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Three dimensional television system
Assignee: Individual
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Filing: 1974-02-22
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Granted: 1977-02-01
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Expires: 1994-02-22
Abstract
Abstract Method and apparatus for producing a three dimensional television image by presenting stereoptican pairs of images to the viewers eyes. One of the stereoptican partners is presented most of the time while the second stereoptican partner is flashed on and off rapidly. Under the proper conditions with the second stereoptican partner being flashed on for a suitably short period of time at the proper repetition rate, the viewer is not consciously aware of its presence and effectively perceives the picture as a three dimensional image.
Inventors
- 👤 Donald J. Imsand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:04
CPC Classifications
H; H04; H04N; H04N13/00; H04N13/20; H04N13/204; H04N13/239; H04N13/10; H04N13/106; H04N13/161; H04N13/296; H04N13/30; H04N13/302; H04N13/25
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
A method of displaying by projecting a stereo pair of images to present a single three dimensional image to normal human perception comprising the steps of positioning a pair of video cameras in stereo relation to each other to view a scene, switching the video signal from first one camera and then the other camera, controlling the time interval that each of the cameras is operative so that one camera is active nearly all of the time while the other camera is active only briefly, synchronizing the video of the two cameras and switched video signals, and transmitting and displaying the switched video signals on a conventional television receiver thereby allowing the human visual perception process to interpret the switched signals as a single three dimensional image.
Claim 2
Independent Claim
127 words
A method of displaying by projecting a stereo pair of images to present a single three dimensional image to normal human perception comprising the steps of positioning a pair of video cameras in stereo relation to each other to view a scene, switching the video signal from first one camera and then the other camera, controlling the time interval that each of the cameras is operative so that one camera is active nearly all of the time while the other camera is active only briefly, synchronizing the video of the two cameras and switched video signals, and transmitting and displaying the switched video signals on a conventional television receiver thereby allowing the human visual perception process to interpret the switched signals as a single three dimensional image.
Claim 3
Dependent Claim
46 words
The method of presenting a three dimensional television image defined in claim 1 wherein the step of controlling the time interval of operation of one of the cameras is nearly continuous while the time interval of operation of the other camera is at the subliminal level.
Claim 4
Dependent Claim
40 words
The method of presenting a three dimensional television image defined in claim 2 wherein one camera is operative for 13/120 of a second and the other camera is operative for 2/120 of a second during each 1/8 second of operation.
Claim 5
Dependent Claim
40 words
The method of presenting a three dimensional television image defined in claim 2 wherein one camera is operative for 11/120 of a second and the other camera is operative for 4/120 of a second during each 1/8 second of operation.
Claim 6
Dependent Claim
149 words
Apparatus for producing a television video signal which appears as a three dimensional image to human visual perception when displayed on a suitable conventional television receiver, said apparatus comprising a pair of television cameras positioned in stereo relation to each other, an electronic video switch operatively connected to said cameras for passing first the video from one camera and then the video from the other camera, a controller operatively connected to said electronic video switch for controlling said video switch to allow the video from one camera to pass nearly all of the time but to interrupt the video from the other camera to pass for a brief instant several times each second, a synchronization generator operatively connected to said cameras and said controller for synchronizing said controller and the video of the two cameras and means for transmitting and displaying the video signals on a suitable television receiver.
Claim 7
Dependent Claim
149 words
Apparatus for producing a television video signal which appears as a three dimensional image to human visual perception when displayed on a suitable conventional television receiver, said apparatus comprising a pair of television cameras positioned in stereo relation to each other, an electronic video switch operatively connected to said cameras for passing first the video from one camera and then the video from the other camera, a controller operatively connected to said electronic video switch for controlling said video switch to allow the video from one camera to pass nearly all of the time but to interrupt the video from the other camera to pass for a brief instant several times each second, a synchronization generator operatively connected to said cameras and said controller for synchronizing said controller and the video of the two cameras and means for transmitting and displaying the video signals on a suitable television receiver.
Claim 8
Dependent Claim
43 words
The apparatus for producing a three dimensional television image defined in claim 5 wherein said controller operatively connected to said electronic video switch allows the video from the other camera to pass for a time interval at the subliminal level of the viewer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-01 | 1980-08-02 | 1981-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-01 | 1984-08-02 | 1985-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-01 | 1988-08-02 | 1989-02-01 | $7700.00 | Window Closed / Lapsed |