US3851094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image pick-up-display system
Assignee: Panasonic Holdings Corp
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Filing: 1972-07-19
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Granted: 1974-11-26
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Expires: 1992-07-19
Abstract
Abstract An image pick-up and display system for picking up and displaying picture information carried on a recording medium comprising, a displayer for producing on a screen a vertically and horizontally moving light-spot of flying-spot having a luminous intensity in dependence on a flying-spot intensity control signal, the screen facing the recording medium so that the flying-spot is intensity-modulated by the picture information, a photo-electric converter such as photo-multiplier for converting the intensity-modulated flying-spot into an electric image signal, and a feed-back circuit for producing the intensity control signal in accordance with the image signal and for feeding-back the intensity control signal to the flying-spot generator so that the original picture information is reproduced on the screen.
Inventors
- 👤 T Misaki
- 👤 T Hane
- 👤 K Sasabe
- 👤 H Kotera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:20
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/36; H04N5/00; H04N5/222; H04N5/257
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
Apparatus for the reproduction of an image, comprising: a cathode ray tube having a layer of white phosphor, means for producing a beam of electrons for scanning said screen to produce a scanning light beam and a visible image, the intensity of said electron beam being dependent upon a control signal supplied to said cathode ray tube; an object positioned to receive said scanning beam of light emitted by said screen; and a feedback loop including a photosensitive element for producing an electrical signal in response to said light beam passing from said object, means for delaying said signal for the duration of a picture element, means for comparing between said signal and said delayed signal to produce a differential signal, means for amplifying said differential signal for controlling the intensity of said electron beam such that a given increment in the intensity of the light from said object produces an opposite increment in the intensity of the eLectron beam.
Claim 2
Dependent Claim
160 words
Apparatus for the reproduction of an image, comprising: a cathode ray tube having a layer of white phosphor, means for producing a beam of electrons for scanning said screen to produce a scanning light beam and a visible image, the intensity of said electron beam being dependent upon a control signal supplied to said cathode ray tube; an object positioned to receive said scanning beam of light emitted by said screen; and a feedback loop including a photosensitive element for producing an electrical signal in response to said light beam passing from said object, means for delaying said signal for the duration of a picture element, means for comparing between said signal and said delayed signal to produce a differential signal, means for amplifying said differential signal for controlling the intensity of said electron beam such that a given increment in the intensity of the light from said object produces an opposite increment in the intensity of the eLectron beam.
Claim 3
Dependent Claim
248 words
Apparatus for the reproduction of images simultaneously on two locations, comprising: a first cathode ray tube, at one location, having a screen including a layer of phosphor and means for producing a beam of electrons for scanning said screen to produce a scanning light beam and a first visible image; an object positioned to receive said scanning beam of light emitted by said first cathode ray tube; a second cathode ray tube, at the other locations, having a screen including a layer of phosphor, means for producing a beam of electrons for scanning said screen to produce a scanning light beam and a second visible image; a second object positioned to receive the scanning beam of light emitted by said second cathode ray tube; a first feedback loop including a first photosensitive element for producing a first electrical signal in response to said light beam emitted by said first cathode ray tube and passing from said object, means for amplifying said electrical signal to produce a first control signal and feed-back circuit means for transmitting said first control signal to said second cathode ray tube; and a second feedback loop including a second photosensitive element for producing a second electrical signal in response to said light beam emitted by said second cathode ray tube and passing from said second object, means for amplifying said electrical signal to produce a second control signal and feed-back circuit means for transmitting said second control signal to said first cathode ray tube.
Claim 4
Dependent Claim
248 words
Apparatus for the reproduction of images simultaneously on two locations, comprising: a first cathode ray tube, at one location, having a screen including a layer of phosphor and means for producing a beam of electrons for scanning said screen to produce a scanning light beam and a first visible image; an object positioned to receive said scanning beam of light emitted by said first cathode ray tube; a second cathode ray tube, at the other locations, having a screen including a layer of phosphor, means for producing a beam of electrons for scanning said screen to produce a scanning light beam and a second visible image; a second object positioned to receive the scanning beam of light emitted by said second cathode ray tube; a first feedback loop including a first photosensitive element for producing a first electrical signal in response to said light beam emitted by said first cathode ray tube and passing from said object, means for amplifying said electrical signal to produce a first control signal and feed-back circuit means for transmitting said first control signal to said second cathode ray tube; and a second feedback loop including a second photosensitive element for producing a second electrical signal in response to said light beam emitted by said second cathode ray tube and passing from said second object, means for amplifying said electrical signal to produce a second control signal and feed-back circuit means for transmitting said second control signal to said first cathode ray tube.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |