US3253086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light valve apparatus
Assignee: General Electric Co
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Filing: 1963-12-23
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Granted: 1966-05-24
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Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Von C Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:13
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A LIGHT VALVE APPARATUS FOR POSITIONING BETWEEN A LIGHT SOURCE AND A SCREEN FOR THE PROJECTION OF AN IMAGE ON THE SCREEN, SAID APPARATUS COMPRISING: (A) AN EVACUATED ENVELOPE, (B) A LIGHT-MODULATING FLUID POSITIONED IN SAID ENVELOPE AND ARRANGED TO CONTROL THE PASSAGE OF LIGHT FROM THE SOURCE TO THE SCREEN, (C) CATHODE MEANS POSITIONED IN SAID ENVELOPE AND ARRANGED TO EMIT A BEAM OF ELECTRONS IMPINGEMENT UPON SAID LIGHT-MODULATING FLUID TO FORM A DIFFRACTION GRATING THEREON FOR SELECTIVELY CONTROLLING THE PASSAGE OF LIGHT FROM THE SOURCE TO THE SCREEN IN ACCORDANCE WITH THE IMAGE BEING PROJECTED, (D) ELECTRON-BEAM-DEFINING MEANS POSITIONED BETWEEN SAID CATHODE MEANS AND SAID LIGHT-MODULATING FLUID IN THE PATH OF SAID ELECTRON BEAM, (E) SAID ELECTRON-BEAM-DEFINING MEANS INCLUDING A PLATE HAVING AN ELECTRON-BEAM-DEFINING APERTURE THEREIN, THE THICKNESS OF SAID PLATE BEING DIRECTLY RELATED TO THE CURRENT DENSITY OF THE ELECTRON BEAM IMPINGENT THEREON TO EFFECT HEATING OF SAID PLATE TO AND ELEVATED TEMPERATURE SUFFICIENT TO ELIMINATE FROM SAID PLANE ANY INSULATING COATING FORMED FROM MOLECULES OF SAID LIGHT-LOVULATING FLUID.
Claim 2
Dependent Claim
172 words
A LIGHT VALVE APPARATUS FOR POSITIONING BETWEEN A LIGHT SOURCE AND A SCREEN FOR THE PROJECTION OF AN IMAGE ON THE SCREEN, SAID APPARATUS COMPRISING: (A) AN EVACUATED ENVELOPE, (B) A LIGHT-MODULATING FLUID POSITIONED IN SAID ENVELOPE AND ARRANGED TO CONTROL THE PASSAGE OF LIGHT FROM THE SOURCE TO THE SCREEN, (C) CATHODE MEANS POSITIONED IN SAID ENVELOPE AND ARRANGED TO EMIT A BEAM OF ELECTRONS IMPINGEMENT UPON SAID LIGHT-MODULATING FLUID TO FORM A DIFFRACTION GRATING THEREON FOR SELECTIVELY CONTROLLING THE PASSAGE OF LIGHT FROM THE SOURCE TO THE SCREEN IN ACCORDANCE WITH THE IMAGE BEING PROJECTED, (D) ELECTRON-BEAM-DEFINING MEANS POSITIONED BETWEEN SAID CATHODE MEANS AND SAID LIGHT-MODULATING FLUID IN THE PATH OF SAID ELECTRON BEAM, (E) SAID ELECTRON-BEAM-DEFINING MEANS INCLUDING A PLATE HAVING AN ELECTRON-BEAM-DEFINING APERTURE THEREIN, THE THICKNESS OF SAID PLATE BEING DIRECTLY RELATED TO THE CURRENT DENSITY OF THE ELECTRON BEAM IMPINGENT THEREON TO EFFECT HEATING OF SAID PLATE TO AND ELEVATED TEMPERATURE SUFFICIENT TO ELIMINATE FROM SAID PLANE ANY INSULATING COATING FORMED FROM MOLECULES OF SAID LIGHT-LOVULATING FLUID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |