Patent US4137478A successfully refreshed from Google Patents.
US4137478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color flat panel television
Assignee: RCA Licensing Corp
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Filing: 1977-06-20
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Granted: 1979-01-30
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Expires: 1997-06-20
Abstract
Abstract An evacuated envelope includes front and rear walls in spaced parallel relationship to one another and connected by a plurality of side walls. On the inner surface of the front wall is a cathodoluminescent screen having stripes of different color light emitting phosphor material. Within the envelope and adjacent to the back wall are a plurality of electron beam guides extending in one dimension. The electron beam guides include means for deflecting the beam out of the guide toward the screen. Between the screen and the beam guides in the evacuated envelope is means for focusing the deflected electron beam sequentially onto one of several stripes of the screen.
Inventors
- 👤 Thomas L. Credelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:28
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/124; H01J29/00; H01J29/46
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
A color image display device comprising: an evacuated envelope having front and back walls in a spaced, substantially parallel relationship; a cathodoluminescent screen on the front wall, the screen comprising a plurality of alternating stripes of different color light emitting phosphor materials; an array of focus wires in a longitudinally spaced, substantially parallel relationship within the envelope substantially parallel to the screen, the spacing between mutually adjacent focus wires within the array being unequal, there being at least as many wires in the array as the number of phosphor stripes, a source of electrons for the display device; and a plurality of electron beam guides extending across the screen between the array of focus wires and the back wall for confining electrons from the source into a beam, said guides including means for extracting the beams out of the guides at various points and directing the beams at each extraction point between different pairs of focus wires in the array and onto the corresponding stripes on the screen.
Claim 2
Dependent Claim
168 words
A color image display device comprising: an evacuated envelope having front and back walls in a spaced, substantially parallel relationship; a cathodoluminescent screen on the front wall, the screen comprising a plurality of alternating stripes of different color light emitting phosphor materials; an array of focus wires in a longitudinally spaced, substantially parallel relationship within the envelope substantially parallel to the screen, the spacing between mutually adjacent focus wires within the array being unequal, there being at least as many wires in the array as the number of phosphor stripes, a source of electrons for the display device; and a plurality of electron beam guides extending across the screen between the array of focus wires and the back wall for confining electrons from the source into a beam, said guides including means for extracting the beams out of the guides at various points and directing the beams at each extraction point between different pairs of focus wires in the array and onto the corresponding stripes on the screen.
Claim 3
Dependent Claim
23 words
The device as in claim 1 wherein the phosphor stripes and the focus wires in the array extend longitudinally in the same dimension.
Claim 4
Dependent Claim
16 words
The device as in claim 2 wherein the beam guides extend orthogonally across the phosphor stripes.
Claim 5
Dependent Claim
14 words
The device as in claim 2 wherein the array of focus wires is planar.
Claim 6
Dependent Claim
18 words
The device as in claim 4 wherein the wires in the array are biased at different constant potentials.
Claim 7
Dependent Claim
14 words
The device as in claim 2 wherein the array of focus wires is nonplanar.
Claim 8
Dependent Claim
19 words
The device as in claim 6 wherein the wires in the array are biased at the same constant potential.
Claim 9
Dependent Claim
16 words
The device as in claim 1 including means for biasing the focus wires in the array.
Claim 10
Dependent Claim
61 words
The device as in claim 1 wherein the electron beam guides comprise: at least one electrode on the back wall of the envelope; a plurality of coplanar first wires parallel to the screen between the back wall and the array extending longitudinally in the same dimension as the phosphor stripes; and a grid structure between the first wires and the array.
Claim 11
Dependent Claim
35 words
The device as in claim 9 wherein the first wires extend longitudinally in the same dimension as the focus wires as there are approximately three times as many focus wires as there are first wires.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |