US4350922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicolor cathode-ray tube with quadrupolar focusing color-selection structure
Assignee: RCA Licensing Corp
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Filing: 1980-06-20
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Granted: 1982-09-21
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Expires: 2000-06-20
Abstract
Abstract CRT comprises a color-selection structure for producing a plurality of quadrupolar lenses, each lens defining a window for passing and focusing portions of electron beams to an associated color group of a target. The color-selection structure comprises (i) a metal masking plate having therein an array of substantially rectangular windows, each window having associated therewith (ii) a pair of first conductors insulatingly spaced from one major surface of the plate and located adjacent opposite sides of the aperture and (iii) a pair of second conductors insulatingly spaced from the other major surface of the plate and located adjacent opposte sides of the window. The CRT includes means for applying a voltage to said plate, means for applying a voltage to said pairs of first conductors and means for applying a voltage to said pairs of second conductors.
Inventors
- 👤 Carmen A. Catanese
- 👤 Stanley Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:54
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/80; H01J29/81
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
187 words
In a cathode-ray tube including (a) a target comprising an array of phosphor elements of different emission colors arranged in cyclic order in adjacent color groups, each group comprising an element of each of said different emission colors, (b) means for producing a plurality of electron beams directed toward said target, and (c) a color-selection structure positioned between said target and said beam-producing means, said color-selection structure having a plurality of means for transmitting portions of said beams to associated color groups of said target and means for focusing without deflecting said beam portions, said structure comprising (i) a metal masking plate having two opposed major surfaces and having therein an array of substantially rectangular windows, each window having associated therewith (ii) a pair of first conductors insulatingly spaced from one major surface of said masking plate and located adjacent opposite sides of said window, each window being associated with only one color group, the improvement wherein said color-selection structure includes (iii) a pair of second conductors insulatingly spaced from the other major surface of said plate and located adjacent opposite sides of each of said windows.
Claim 2
Dependent Claim
187 words
In a cathode-ray tube including (a) a target comprising an array of phosphor elements of different emission colors arranged in cyclic order in adjacent color groups, each group comprising an element of each of said different emission colors, (b) means for producing a plurality of electron beams directed toward said target, and (c) a color-selection structure positioned between said target and said beam-producing means, said color-selection structure having a plurality of means for transmitting portions of said beams to associated color groups of said target and means for focusing without deflecting said beam portions, said structure comprising (i) a metal masking plate having two opposed major surfaces and having therein an array of substantially rectangular windows, each window having associated therewith (ii) a pair of first conductors insulatingly spaced from one major surface of said masking plate and located adjacent opposite sides of said window, each window being associated with only one color group, the improvement wherein said color-selection structure includes (iii) a pair of second conductors insulatingly spaced from the other major surface of said plate and located adjacent opposite sides of each of said windows.
Claim 3
Dependent Claim
34 words
The tube defined in claim 1 including means for applying a voltage to said plate, means for applying a voltage to said first conductors and means for applying a voltage to said second conductors.
Claim 4
Dependent Claim
35 words
The tube defined in claim 1 wherein said phosphor elements are in the form of substantially parallel stripes, and said windows are arranged in columns that are substantially parallel to the lengths of said stripes.
Claim 5
Dependent Claim
50 words
The tube defined in claim 3 wherein said first conductors are located adjacent the sides of said windows that are substantially parallel to the lengths of said stripes and said second conductors are located adjacent the sides of said windows that are substantially parallel to the lengths of said stripes.
Claim 6
Dependent Claim
17 words
The tube defined in claim 4 wherein the windows of adjacent columns are aligned in a row.
Claim 7
Dependent Claim
17 words
The tube defined in claim 4 wherein the windows of adjacent columns are offset from one another.
Claim 8
Dependent Claim
50 words
The tube defined in claim 3 wherein said first conductors are located adjacent the sides of said windows that are substantially parallel to the lengths of said stripes, and said second conductors are located adjacent the sides of said windows that are substantially normal to the lengths of said stripes.
Claim 9
Dependent Claim
50 words
The tube defined in claim 3 wherein said first conductors are located adjacent the sides of said windows that are substantially normal to the lengths of said stripes, and the second conductors are located adjacent the sides of said windows that are substantially normal to the lengths of said stripes.
Claim 10
Dependent Claim
16 words
The tube defined in claim 8 wherein the windows of adjacent rows are aligned in columns.
Claim 11
Dependent Claim
29 words
The tube defined in claim 3 wherein said target comprises an array of phosphor elements of three different colors, and said beam-producing means produces three convergent in-line electron beams.
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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) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |