US4882521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflection yoke for a color cathode ray tube
Assignee: Panasonic Holdings Corp
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Filing: 1988-05-18
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Granted: 1989-11-21
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Expires: 2008-05-18
Abstract
Abstract A deflection yoke has magentic field correcting auxiliary yokes (5) disposed at the flare side end of the insulative bobbin (2) for holding a pair of horizontal deflection coils (3) and a pair of vertical deflection coils (4), each magnetic field correcting auxiliary yokes (5) comprising a long and slender arc shaped core (6) disposed along the end portion of either of the horizontal deflection coils (4) or the vertical deflection coils (4) and a pair of auxiliary coils (8R, 8L) which are wound on the core (6) and connected in series to the vertical deflection coils (4); and thereby the raster distortion and mis-convergence are substantially reduced.
Inventors
- 👤 Nozomu Arimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:59
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/72; H01J29/76; H01J29/701; H01J29/702; H01J29/705; H01J2229/00; H01J2229/56; H01J2229/568; H01J2229/5681; H01J2229/5687
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
103 words
A deflection yoke for a color cathode ray tube comprising: a pair of horizontal deflection coils; a pair of vertical deflection coils; an insulative bobbin for supporting said deflection coils, said bobbin having a flared end; magnetic field correction means disposed at the flared end of the insulative bobbin, having ferro-magnetic cores of a long and slender shape and disposed along the end portion of either of said horizontal deflection coils or said vertical deflection coils; and a pair of auxiliary coils which are wound at both end portions of said core and are connected to said horizontal or vertical deflection coils, respectively.
Claim 2
Dependent Claim
103 words
A deflection yoke for a color cathode ray tube comprising: a pair of horizontal deflection coils; a pair of vertical deflection coils; an insulative bobbin for supporting said deflection coils, said bobbin having a flared end; magnetic field correction means disposed at the flared end of the insulative bobbin, having ferro-magnetic cores of a long and slender shape and disposed along the end portion of either of said horizontal deflection coils or said vertical deflection coils; and a pair of auxiliary coils which are wound at both end portions of said core and are connected to said horizontal or vertical deflection coils, respectively.
Claim 3
Dependent Claim
23 words
A deflection yoke in accordance with claim 1, wherein said auxiliary coils are connected in series to said horizontal and vertical deflection coils.
Claim 4
Dependent Claim
102 words
A deflection yoke for a color cathode ray tube comprising: a pair of horizontal deflection coils; a pair of vertical deflection coils; an insulative bobbin for supporting said deflection coils, said bobbin having a flared end; and magnetic field correction means disposed at the flared end of the insulative bobbin, having ferro-magnetic cores of a long and slender shape and disposed along the end portion of either of said horizontal deflection coils or said vertical deflection coils; and a pair of auxiliary coils which are wound on said core and are connected in series to said horizontal or vertical deflection coils, respectively.
Claim 5
Dependent Claim
102 words
A deflection yoke for a color cathode ray tube comprising: a pair of horizontal deflection coils; a pair of vertical deflection coils; an insulative bobbin for supporting said deflection coils, said bobbin having a flared end; and magnetic field correction means disposed at the flared end of the insulative bobbin, having ferro-magnetic cores of a long and slender shape and disposed along the end portion of either of said horizontal deflection coils or said vertical deflection coils; and a pair of auxiliary coils which are wound on said core and are connected in series to said horizontal or vertical deflection coils, respectively.
Claim 6
Dependent Claim
25 words
A deflection yoke in accordance with claim 1, wherein both end portions of said core are formed thicker in comparison to the mid portion thereof.
Claim 7
Dependent Claim
25 words
A deflection yoke in accordance with claim 3 wherein both end portions of said core are formed thicken in comparison to the mid portion thereof.
Claim 8
Dependent Claim
116 words
A deflection yoke for a color cathode ray tube comprising: a pair of horizontal deflection coils; a pair of vertical deflection coils; an insulative bobbin for supporting said deflection coils, said bobbin having a flared end; and magnetic field correction means disposed at the flared end of the insulative bobbin, having ferro-magnetic cores of a long and slender shape and disposed along the end portion of either of said horizontal deflection coils or said vertical deflection coils, both end portions of said core are formed thicker in comparison with the mid portion thereof; and a pair of auxiliary coils which are wound on said core and are connected to said horizontal or vertical deflection coils, respectively.
Claim 9
Dependent Claim
116 words
A deflection yoke for a color cathode ray tube comprising: a pair of horizontal deflection coils; a pair of vertical deflection coils; an insulative bobbin for supporting said deflection coils, said bobbin having a flared end; and magnetic field correction means disposed at the flared end of the insulative bobbin, having ferro-magnetic cores of a long and slender shape and disposed along the end portion of either of said horizontal deflection coils or said vertical deflection coils, both end portions of said core are formed thicker in comparison with the mid portion thereof; and a pair of auxiliary coils which are wound on said core and are connected to said horizontal or vertical deflection coils, respectively.
Claim 10
Dependent Claim
25 words
A deflection yoke in accordance with claim 1, wherein both of said horizontal deflection coils and said vertical deflection coil are of saddle winding type.
Claim 11
Dependent Claim
25 words
A deflection yoke in accordance with claim 3 wherein both of said horizontal deflection coils and said vertical deflection coil are of saddle winding type.
Claim 12
Dependent Claim
25 words
A deflection yoke in accordance with claim 6 wherein both of said horizontal deflection coils and said vertical deflection coil are of saddle winding type.
Claim 13
Dependent Claim
26 words
A deflection yoke in accordance with claim 1, wherein said core is curved in a convex arc shape along the end portion of the deflection coil.
Claim 14
Dependent Claim
26 words
A deflection yoke in accordance with claim 3 wherein said core is curved in a convex arc shape along the end portion of the deflection coil.
Claim 15
Dependent Claim
26 words
A deflection yoke in accordance with claim 6 wherein said core is curved in a convex arc shape along the end portion of the deflection coil.
Claim 16
Dependent Claim
21 words
A deflection yoke in accordance with claim 1, wherein said ferro-magnetic core is of a ribbon shape or a wire shape.
Claim 17
Dependent Claim
21 words
A deflection yoke in accordance with claim 3 wherein said ferro-magnetic core is of a ribbon shaape or a wire shape.
Claim 18
Dependent Claim
21 words
A deflection yoke in accordance with claim 6 wherein said ferro-magnetic core is of a ribbon shape or a wire shape.
Claim 19
Dependent Claim
19 words
A deflection yoke in accordance with claim 1 wherein said ferro-magnetic cores are disposed along said horizontal deflection coils.
Claim 20
Dependent Claim
19 words
A detection yoke in accordance with claim 3 wherein said ferro-magnetic cores are disposed along said horizontal deflection coils.
Claim 21
Dependent Claim
19 words
A deflection yoke in accordance with claims 6 wherein said ferro-magnetic cores are disposed along said horizontal deflection coils.
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) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |