Patent US4077700A successfully refreshed from Google Patents.
US4077700A
Expired / Lapsed
US
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Waveguide addressing and modulating method and apparatus
Assignee: Xerox Corp
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Filing: 1976-11-26
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Granted: 1978-03-07
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Expires: 1996-11-26
Abstract
Abstract Waveguides having light propagating therethrough are positioned between a common electrode and individual electrodes arranged along a charge-coupled device. The waveguides are of a type which modulate the propagating light responsive to an electric field. The charge-coupled device is activated to place charges at selected ones of the individual electrodes, creating a field across the waveguide by which light propagating through the waveguide is modulated.
Inventors
- 👤 Don L. Camphausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:27
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/1326; G02F1/0128; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A device for individually addressing and modulating light propagating through selected ones of a plurality of optical waveguides, the device comprising: a. a common electrode; b. a plurality of individual optical waveguides having light propagating therethrough arranged adjacent the common electrode, the waveguides being formed from a material which modulates the propagating light responsive to an electrical field; c. a charged-coupled device positioned to intersect the individual optical waveguides, the charge-coupled device including an individual electrode adjacent each optical waveguide opposite the common electrode; and d. a control means to cause the charge-coupled device to place a charge at selected ones of the individual electrodes establishing an electrical field between each of the selected ones of the individual electrodes and the common electrode.
Claim 2
Independent Claim
123 words
A device for individually addressing and modulating light propagating through selected ones of a plurality of optical waveguides, the device comprising: a. a common electrode; b. a plurality of individual optical waveguides having light propagating therethrough arranged adjacent the common electrode, the waveguides being formed from a material which modulates the propagating light responsive to an electrical field; c. a charged-coupled device positioned to intersect the individual optical waveguides, the charge-coupled device including an individual electrode adjacent each optical waveguide opposite the common electrode; and d. a control means to cause the charge-coupled device to place a charge at selected ones of the individual electrodes establishing an electrical field between each of the selected ones of the individual electrodes and the common electrode.
Claim 3
Dependent Claim
27 words
The device of claim 1 wherein the optical waveguides are made from a light transmissive liquid crystal material which becomes light-scattering in the presence of a field.
Claim 4
Dependent Claim
34 words
The device of claim 1 wherein the optical waveguides are made from a deformable material of a given cross-section which physically deforms to change the given cross-section in the presence of an electrical field.
Claim 5
Independent Claim
69 words
A method for individually modulating light propagating through a plurality of individual waveguides which are formed from a material which modulates propagating light responsive to an electrical field, which comprises: a. positioning each of the individual waveguides between a common electrode and an individual electrode of a charge-coupled device; and b. operating the charge-coupled device to establish fields between selected ones of the individual electrodes and the common electrode.
Claim 6
Independent Claim
69 words
A method for individually modulating light propagating through a plurality of individual waveguides which are formed from a material which modulates propagating light responsive to an electrical field, which comprises: a. positioning each of the individual waveguides between a common electrode and an individual electrode of a charge-coupled device; and b. operating the charge-coupled device to establish fields between selected ones of the individual electrodes and the common 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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |