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Patent US4950949A successfully refreshed from Google Patents.
US4950949A
Expired / Lapsed
US
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Color display tube having asymmetric deflection electrodes
Assignee: US Philips Corp
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Filing: 1988-10-07
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Granted: 1990-08-21
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Expires: 2008-10-07
Abstract
Abstract A color display tube which comprises a display window and a phosphor pattern provided on the display window, an emission system for producing a pattern of juxtaposed rows of electron beams correlated with the phosphor pattern, an array of strip-shaped deflection electrodes situated between the emission system and the display screen for deflecting electron beams, each deflection electrode extending between adjacent rows of the emission pattern, alternate deflection electrodes being a commonly connected first group, and the remaining deflection electrodes being a commonly connected second group, is characterized in that the deflection electrodes extend asymmetrically with respect to the rows of electron beams.
Inventors
- 👤 Ronald van der Wilk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:16
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/46; H01J29/70; H01J29/72; H01J29/74; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/126
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
A colour display tube which comprises in a sealed envelope a display window, a phosphor pattern provided on the display window, an emission system for producing an emission pattern of juxtaposed rows of electron beams correlated with the phosphor pattern, and an array of parallel, strip shaped deflection electrodes between the emission system and the display window for deflecting the electron beams, in which each deflection electrode extends between adjacent rows of electron beams of the emission pattern, alternate ones being a first group of commonly connected electrodes and the remaining ones being a second group of commonly connected electrodes, characterized in that the array of deflection electrodes extends asymmetrically with respect to the emission pattern.
Claim 2
Dependent Claim
116 words
A colour display tube which comprises in a sealed envelope a display window, a phosphor pattern provided on the display window, an emission system for producing an emission pattern of juxtaposed rows of electron beams correlated with the phosphor pattern, and an array of parallel, strip shaped deflection electrodes between the emission system and the display window for deflecting the electron beams, in which each deflection electrode extends between adjacent rows of electron beams of the emission pattern, alternate ones being a first group of commonly connected electrodes and the remaining ones being a second group of commonly connected electrodes, characterized in that the array of deflection electrodes extends asymmetrically with respect to the emission pattern.
Claim 3
Dependent Claim
19 words
A colour display tube as claimed in claim 1, in which the deflection electrodes are situated in one plane.
Claim 4
Dependent Claim
20 words
A colour display tube as claimed in claim 1, in which the deflection electrodes are situated on a plate-shaped support.
Claim 5
Dependent Claim
37 words
A colour display tube as claimed in claim 3, in whihc the first group of deflection electrodes is situated on one side and the second group is situated on the other side of the plate-shaped insulating support.
Claim 6
Dependent Claim
23 words
A colour display tube as claimed in claim 1, in which adjacent deflection electrodes are situated at varying distances to the display screen.
Claim 7
Dependent Claim
36 words
A colour display tube as claimed in claim 5, in which the cross-section of the group of deflection electrodes which is nearest to the display screen is smaller than that of the other deflection electrode group.
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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |