US3560793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color television convergence system
Assignee: Orega Electronique et Mecanique
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Filing: 1969-04-10
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Granted: 1971-02-02
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Expires: 1989-04-10
Abstract
Abstract The convergence correction device for three-gun according to the invention is of the type comprising, for corrections at line and field period, for each red or green gun, a single magnetic circuit around which are wound coils carrying currents which generate the magnetic correction fields, these currents being of line and field frequencies. It is essentially characterized in that each of the windings corresponding respectively to red and to green is divided into a first and a second element: the first red and green elements receive in parallel a correction current whose purpose is to bring the two points of impact corresponding to the same signal on the same vertical line on the screen. The second red and green elements are coupled so as to generate two fields of the same amplitude but of opposite sign to bring these two points on the same horizontal line on the screen.
Inventors
- 👤 Michel Payen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:20
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/701; H01J29/702; H01J29/705; H01J2229/00; H01J2229/56; H01J2229/568; H01J2229/5681; H01J2229/5687
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
185 words
A convergence correction device for a color television tube, having two side guns and a tricolor screen, said device comprising: a first and a second magnetic circuit respectively associated with said two guns, two corresponding first winding systems respectively associated with said first and second magnetic circuits; each of said first winding systems comprising a first and a second coil; first means for applying to said first coils of said two corresponding first winding systems, a first signal at the line frequency for creating therein substantially parabolic currents of equal amplitude and second means for applying to said second coils of said two corresponding first winding systems, a second signal at the line frequency for creating therein substantially sawtooth-shaped currents of equal amplitude; and said first coils of said first winding systems and said second coils of said first winding systems being respectively so interconnected that the magnetic fields created by the two coils of one of said first winding systems, are in the same direction, and the magnetic fields created by the two coils of the other first winding system are in opposite direction.
Claim 2
Dependent Claim
185 words
A convergence correction device for a color television tube, having two side guns and a tricolor screen, said device comprising: a first and a second magnetic circuit respectively associated with said two guns, two corresponding first winding systems respectively associated with said first and second magnetic circuits; each of said first winding systems comprising a first and a second coil; first means for applying to said first coils of said two corresponding first winding systems, a first signal at the line frequency for creating therein substantially parabolic currents of equal amplitude and second means for applying to said second coils of said two corresponding first winding systems, a second signal at the line frequency for creating therein substantially sawtooth-shaped currents of equal amplitude; and said first coils of said first winding systems and said second coils of said first winding systems being respectively so interconnected that the magnetic fields created by the two coils of one of said first winding systems, are in the same direction, and the magnetic fields created by the two coils of the other first winding system are in opposite direction.
Claim 3
Dependent Claim
165 words
A device as claimed in claim 1 further comprising two corresponding second winding systems respectively associated with said first and second magnetic circuits, each of said second winding systems comprising a first and a second coil; third means being provided for applying to said first coils of said two corresponding second winding systems a first signal at the field frequency for creating therein substantially parabolic currents of equal amplitude; fourth means being provided for applying to said second coils of said two corresponding second winding systems a second signal at the field frequency for creating therein substantially sawtooth-shaped currents of equal amplitude; said first coils of said second winding systems and said second coils of said second winding systems being respectively so interconnected, that magnetic field created by the two coils of one of said second winding systems are in the same direction and the magnetic fields created by the two coils of the other of said second winding systems are in the opposite direction.
Claim 4
Dependent Claim
114 words
A device as claimed in claim 1, wherein said first means comprise: a first terminal, a second terminal and a third terminal; means for feeding to said third terminal a pulsed signal at the line frequency; means for connecting said first coils of said first winding systems, to said first terminal and said second terminal; a first capacitor and a first inductance being series connected between said second and third terminals; a second capacitor and a first resistor being connected between said second and said first terminal; a third resistance and a diode connected in series between said first and said second terminal, said diode conducting from said second terminal to said first terminal.
Claim 5
Dependent Claim
27 words
A device as claimed in claim 3, wherein said first coils of said first winding systems are parallel connected between said first terminal and said second terminal.
Claim 6
Dependent Claim
27 words
A device as claimed in claim 3, wherein said first coils of said first windiNg systems are series connected between said first terminal and said second terminal.
Claim 7
Dependent Claim
53 words
A device as claimed in claim 1, wherein said second means comprise a variable inductance, having a first terminal to which a pulsed line frequency signal is applied, and a second terminal, means being provided for connecting said second coils of said first winding systems to the ground and to said second terminal.
Claim 8
Dependent Claim
26 words
A device as claimed in claim 6, wherein said second coils of said first winding systems are series connected, between the ground and said other terminal.
Claim 9
Dependent Claim
26 words
A device as claimed in claim 6, wherein said second coils of said first winding systems are parallely connected between the ground and said other terminal.
Claim 10
Dependent Claim
95 words
A device as claimed in claim 2, wherein said third means comprise: a first potentiometer having a first terminal grounded, a second terminal for receiving a parabolic voltage at said field frequency, and a movable tap; a second potentiometer having two terminals and a movable tap; a transformer having a secondary, having two terminals respectively connected to said second potentiometer terminals: means for feeding to said transformer a sawtooth-shaped voltage at said field frequency: said first coils of said second winding systems being series connected between the movable taps of said first and second potentiometer.
Claim 11
Dependent Claim
80 words
A device as claimed in claim 9, wherein said fourth means comprise a third potentiometer having a movable tap and two terminals respectively connected to said transformer secondary terminals; a fourth potentiometer having two terminals, and a movable tap grounded, means being provided for connecting in series said second coils of said second winding systems to said two terminals of said fourth potentiometer, and a lead between said second coils being connected to said movable tap of said third potentiometer.
Claim 12
Dependent Claim
39 words
A device as claimed in claim 1, wherein each of said magnetic circuits comprises two L-shaped arms, an airgap between said arms and a cylindrical magnet in said airgap, and means for adjusting the angular position of said magnet.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |