US5489817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron-optical terminal image device based on a cold cathode
Assignee: Scitex Corp Ltd
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Filing: 1992-04-15
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Granted: 1996-02-06
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Expires: 2012-04-15
Abstract
Abstract A cold cathode (3) in the form of a solid thin film component is the basis for electron-optical terminal image devices. The thin-film structure is made up of a base electrode (5), e.g., in the form of a bundle of parallel strips, an insulating film (6), a semiconductor film (7) and a covering electrode (8), e.g., also a bundle of parallel strips but running perpendicularly to the base electrode (5) bundle. This set of layers borne on a substrate plate (4), is in an evacuated casing (2) and is opposite a fluorescent screen (12) or a light emitter (15), the metalized coating (11) of which forms the counter-pole for the electron acceleration chamber (9). The main applications of such electron-optical terminal image devices are embodiments as matrix-addressed flat displays, image converters or write/read lines.
Inventors
- 👤 Gerd O. Muller
- 👤 Regina Muller-Mach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:42
CPC Classifications
B; B82; B82Y; B82Y10/00; H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/312; H01J29/00; H01J29/02; H01J29/04; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; H01J2201/00; H01J2201/30; H01J2201/312; H01J2201/3125; Y; Y10; Y10S; Y10S345/00; Y10S345/905
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
An image converter device for UV or X-ray images, including an airtight vacuum envelope comprising: (a) a multilayered photocathode structure, said structure including a non-conducting substrate substantially transparent to UV or X-ray radiation laminated with the following thin layers in sequence: (i) a first conductive layer serving as a ground voltage inducing electrode which is substantially transparent to the UV or X-ray radiation; (ii) an insulator film which is substantially transparent to the UV or X-ray radiation; (iii) a semi-conductor film; and (iv) a second conductive layer serving as a cover electrode including a multiplicity of electron-ejecting cathode spots each having a thickness of no more than 40 nm for allowing a passage of electrons; and (b) an anode structure including a fluorescent screen positioned parallel to said cold cathode structure and being separated from said photo-cathode structure by an electron acceleration space.
Claim 2
Dependent Claim
143 words
An image converter device for UV or X-ray images, including an airtight vacuum envelope comprising: (a) a multilayered photocathode structure, said structure including a non-conducting substrate substantially transparent to UV or X-ray radiation laminated with the following thin layers in sequence: (i) a first conductive layer serving as a ground voltage inducing electrode which is substantially transparent to the UV or X-ray radiation; (ii) an insulator film which is substantially transparent to the UV or X-ray radiation; (iii) a semi-conductor film; and (iv) a second conductive layer serving as a cover electrode including a multiplicity of electron-ejecting cathode spots each having a thickness of no more than 40 nm for allowing a passage of electrons; and (b) an anode structure including a fluorescent screen positioned parallel to said cold cathode structure and being separated from said photo-cathode structure by an electron acceleration space.
Claim 3
Dependent Claim
14 words
The device according to claim 1, wherein said ground and cover electrodes are continuous.
Claim 4
Dependent Claim
19 words
The device according to claim 1, wherein said ground and cover electrodes are configured as mutually perpendicular electrode stripes.
Claim 5
Dependent Claim
28 words
The device according to claim 1, wherein said anode structure includes a thin electrode layer deposited on a side of said fluorescent screen which faces said photo-cathode structure.
Claim 6
Dependent Claim
16 words
The device according to claim 1, wherein said fluorescent screen includes regions of different fluorescent materials.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |