Patent US3763452A successfully refreshed from Google Patents.
US3763452A
Expired / Lapsed
US
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Color television picture tube apparatus
Assignee: Denki Onkyo Co Ltd
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Filing: 1971-08-31
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Granted: 1973-10-02
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Expires: 1991-08-31
Abstract
Abstract A color television picture tube apparatus which displaces the electron beam dispersing position in the plane of deflection center of the delta gun shadow mask type color cathode-ray tube in which three electron guns are positioned respectively at the vertices of an equilateral triangle so that the beam spot from each electron gun is incident upon each vertex of the equilateral triangle on the screen of the cathode-ray tbe.
Inventors
- 👤 H Ikeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:20
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/701; H01J29/702; H01J29/705; H01J2229/00; H01J2229/56; H01J2229/563; H01J2229/5637
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
216 words
A color television picture tube apparatus comprised of: a. a delta gun shadow mask type color cathode-ray tube in which three electron guns are arranged to conform respectively to the vertices of an equilateral triangle, b. a deflecting means which deflects and scans electron beams so that three electron beam spots on the screen when the beams are not converged are respectively positioned at the vertices of an equilateral triangle on at least one certain line including the center of the screen and at the vertices of an isosceles triangle which is symmetrical in reference to the center of the screen on othe lines including the center of the screen. c. a correcting field generating means which makes the convergence distance shorter than the longest convergence distance of the original isosceles triangle and longer than the shortest convergence distance of the original isosceles triangle and provides a uniform convergence distance by deflecting at least two electron beams in the horizontal direction at the deflection center of the deflection means so that the electron beam spots conform respectively to the vertices of the equilateral triangle on the screen, and d. a convergence yoke which converges a group of electron beams to concentrate the electron beams into the small holes of the shadow mask of the cathode-ray tube.
Claim 2
Dependent Claim
216 words
A color television picture tube apparatus comprised of: a. a delta gun shadow mask type color cathode-ray tube in which three electron guns are arranged to conform respectively to the vertices of an equilateral triangle, b. a deflecting means which deflects and scans electron beams so that three electron beam spots on the screen when the beams are not converged are respectively positioned at the vertices of an equilateral triangle on at least one certain line including the center of the screen and at the vertices of an isosceles triangle which is symmetrical in reference to the center of the screen on othe lines including the center of the screen. c. a correcting field generating means which makes the convergence distance shorter than the longest convergence distance of the original isosceles triangle and longer than the shortest convergence distance of the original isosceles triangle and provides a uniform convergence distance by deflecting at least two electron beams in the horizontal direction at the deflection center of the deflection means so that the electron beam spots conform respectively to the vertices of the equilateral triangle on the screen, and d. a convergence yoke which converges a group of electron beams to concentrate the electron beams into the small holes of the shadow mask of the cathode-ray tube.
Claim 3
Dependent Claim
107 words
An apparatus according to claim 1 wherein the deflection means deflects the electron beams so that the electron beam spots on the screen are dispersed to conform respectively to the vertices of the equilateral triangle on diagonal lines on the screen, to the vertices of an isosceles triangle with a long base and a short perpendicular bisector on the line including the centers of the top and bottom or on the line including the centers of the right and left sides of the screen and to the vertices of an isosceles triangle with a short base and a long perpendicular bisector on the rest of these lines.
Claim 4
Dependent Claim
94 words
An apparatus according to claim 1 wherein the correcting field, which causes one electron beam positioned at a vertex of a triangle to shift along a vertical line including the center of the deflection field and other two beams to shift in a horizoNtal direction, is formed by the correcting field generating means, and when the electron beam in the vertical direction is shifted upward, other two electron beams are shifted to approach each other and when the electron beam in the vertical direction is shifted downward, other two beams are shifted to disperse.
Claim 5
Dependent Claim
81 words
An apparatus according to claim 1 wherein the correcting field, which does not affect one electron beam in the vertical direction conforming to one vertex of a triangle and shifts obliquely other two beams to approach each other and to depart from the electron beam positioned in the vertical direction and also shifts obliquely the two beams to depart from each other and to approach the electron beam positioned in the vertical direction, is formed by the correcting field generating means.
Claim 6
Dependent Claim
121 words
In a deflection yoke having a ring-shaped core provided with a pair of vertical deflection coils and a pair of horizontal deflection coils, the improvement comprising a field correcting coil forming a correcting field at the center of the deflection field of the deflection yoke, said field correcting coil consisting of four coil parts arranged at 90* intervals and connected to form a four-pole magnetic field generating area in which mutually opposing poles have the same polarity and adjacent poles have different polarity, each of said four coil parts providing a symmetrical field distribution in reference to the two axes which are 45* from the vertical and horizontal axes and intersect at right angles at the center of the deflection yoke.
Claim 7
Dependent Claim
121 words
In a deflection yoke having a ring-shaped core provided with a pair of vertical deflection coils and a pair of horizontal deflection coils, the improvement comprising a field correcting coil forming a correcting field at the center of the deflection field of the deflection yoke, said field correcting coil consisting of four coil parts arranged at 90* intervals and connected to form a four-pole magnetic field generating area in which mutually opposing poles have the same polarity and adjacent poles have different polarity, each of said four coil parts providing a symmetrical field distribution in reference to the two axes which are 45* from the vertical and horizontal axes and intersect at right angles at the center of the deflection yoke.
Claim 8
Dependent Claim
39 words
A deflection yoke according to claim 5 wherein four coil parts are toroidally wound around the ring-shaped core and two of the four coils are opposed on the vertical axis and other two are opposed on the horizontal axis.
Claim 9
Dependent Claim
44 words
A deflection yoke according to claim 5 wherein four flat-shaped coil parts are provided at the ring-shaped core and are arranged so that they are positioned on two axes deflected by 45* from the vertical and horizontal axes which intersect at a right angle.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |