US3764211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display system capable of selective annotation
Assignee: Eastman Kodak Co
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Filing: 1972-08-25
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Granted: 1973-10-09
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Expires: 1992-08-25
Abstract
Abstract A display system for information, the system having a photoconductor-liquid crystal sandwich image storage device for receiving an initial piece of information and being capable of selective annotation. The annotation may be accomplished by utilizing a source of imaging radiation independent of the radiation source used for imaging the initial piece of information so as to superimpose an additional image signal to the initial piece of information or, alternatively, activating a segment of the photoconductor-liquid crystal sandwich to alter the portion of the image in that particular segment.
Inventors
- 👤 J Morse
- 👤 C James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:13
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/26; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/135; G03B19/00; G03B19/18; G03B27/00; G03B27/32; G03B27/52; G03B27/521; H; H04; H04N; H04N1/00; H04N1/024; H04N1/032; H04N1/036; H04N1/387; H04N1/3871
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
An informational display system comprising: an image storage device for recording and storing an image pattern of an initial piece of information, said image storage device including a photoconductor-liquid crystal sandwich and means to apply a potential across said sandwich in order to permit said sandwich to record the image therein; means for projecting an image radiation pattern of an initial piece of information onto said image storage device; means for activating said potential across said photoconductorliquid crystal sandwich to store said image of said initial piece of information therein; means for altering at least a portion of said image of said initial piece of information stored on said image storage device; and means for transmitting said altered stored image from said image storage device to a receiving station.
Claim 2
Dependent Claim
129 words
An informational display system comprising: an image storage device for recording and storing an image pattern of an initial piece of information, said image storage device including a photoconductor-liquid crystal sandwich and means to apply a potential across said sandwich in order to permit said sandwich to record the image therein; means for projecting an image radiation pattern of an initial piece of information onto said image storage device; means for activating said potential across said photoconductorliquid crystal sandwich to store said image of said initial piece of information therein; means for altering at least a portion of said image of said initial piece of information stored on said image storage device; and means for transmitting said altered stored image from said image storage device to a receiving station.
Claim 3
Dependent Claim
103 words
The apparatus of claim 1 wherein said initial piece of information is a transparency and wherein said means for projecting said image of said initial piece of information comprises a transparency holder for supporting said transparency, a projection radiation source to which the image storage device is responsive, a condenser lens between said projection radiation source and said transparency for directing radiation from said source through said transparency, a relay objective between said transparency holder and said image storage device for directing the radiation through said transparency to said image storage device in a radiation pattern representative of the image of said transparency.
Claim 4
Dependent Claim
64 words
The apparatus of claim 2 wherein said means for altering at least a portion of said image of said initial piece of information stored on said image storage device includes a second source of radiation to which the image storage device is responsive and means for selectively directing radiation from said second source onto said image storage device to alter the image stored therein.
Claim 5
Dependent Claim
54 words
The apparatus of claim 1 wherein said means for projecting said image of said initial piece of information is a source of radiation to which said image storage device is responsive and means for directing radiation from said source onto said image storage device in a pattern representative of said initial piece of information.
Claim 6
Dependent Claim
57 words
The apparatus of claim 4 wherein said means for altering at least a portion of said image of said initial piece of information stored on said image storage device includes means for selectively activating A portion of said image storage device so that radiation directed onto said image storage device will affect only that portion selectively activated.
Claim 7
Dependent Claim
77 words
The apparatus of claim 4 wherein said photoconductor-liquid crystal sandwich includes a segmented first transparent electrode, a layer of photoconductor material in contiguous relationship with said first electrode, a layer of liquid crystal material in contiguous relationship with said layer of photoconductor material, and a segmented second transparent electrode in contiguous relationship with said layer of liquid crystal material, the segments of said second transparent electrode being transversely oriented to said segments of said first transparent electrode.
Claim 8
Dependent Claim
112 words
The apparatus of claim 6 wherein said means to apply a potential across said sandwich includes an a.c. potential source connected to a first and second terminal, a d.c. potential source connected to said first terminal and a third terminal, a potential selection switch being selectively positionable to contact said second terminal or said third terminal to select either the a.c. potential or d.c. potential respectively or an intermediate neutral position, a first segment selector switch means for connecting said first terminal to a desired segment of said first transparent electrode, and a second segment selector switch means connecting said potential selection switch to a desired segment of said second transparent electrode.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |