US3795835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal linearity correction circuit
Assignee: GTE Sylvania Inc
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Filing: 1972-09-08
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Granted: 1974-03-05
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Expires: 1992-09-08
Abstract
Abstract A cathode ray tube deflection circuit having a flyback transformer coupled to a potential source and via a parallel coupled horizontal output stage and a horizontal deflection yoke to a potential reference level with a damper stage coupled to the junction of the transformer means, output stage, and deflection yoke includes a linearity correction circuit wherein a winding of the transformer means coupled to a potential reference level is also coupled to a series connected switching means and series resonant circuit connected to the potential reference level and to the damper stages whereby the rate of change of current flow through a deflection yoke is altered to enhance linearity of the trace period of a cathode ray tube.
Inventors
- 👤 F Aldrich
- 👤 M Fischman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:23
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/62; H03K4/90; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/23; H04N3/233
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
113 words
In a high voltage system having a horizontal flyback transformer means coupled to a parallel connected horizontal output stage and a horizontal deflection yoke connected intermediate a potential source and a potential reference level with a damper stage coupled to the junction of the transformer means and parallel connected output stage and deflection yoke, a horizontal linearity correction circuit comprising: a winding of said transformer means coupled to a potential reference level; and switching means and a series resonant circuit series connected intermediate said winding and a potential reference level and coupled to said damper stage whereby a potential applied to said damper effects control of current flow in said horizontal deflection yoke.
Claim 2
Dependent Claim
113 words
In a high voltage system having a horizontal flyback transformer means coupled to a parallel connected horizontal output stage and a horizontal deflection yoke connected intermediate a potential source and a potential reference level with a damper stage coupled to the junction of the transformer means and parallel connected output stage and deflection yoke, a horizontal linearity correction circuit comprising: a winding of said transformer means coupled to a potential reference level; and switching means and a series resonant circuit series connected intermediate said winding and a potential reference level and coupled to said damper stage whereby a potential applied to said damper effects control of current flow in said horizontal deflection yoke.
Claim 3
Dependent Claim
20 words
The linearity correction circuit of claim 1 wherein said series resonant circuit includes a series connected capacitor and adjustable inductor.
Claim 4
Dependent Claim
18 words
The linearity correction circuit of claim 1 wherein said switching means is in the form of a diode.
Claim 5
Dependent Claim
39 words
The linearity correction circuit of claim 1 wherein said switching means is in the form of an SCR in series with said series resonant circuit and having a gate electrode coupled by a resistor to said series resonant circuit.
Claim 6
Dependent Claim
47 words
The linearity correction circuit of claim 1 wherein said switching means is in the form of a transistor having emitter and collector electrodes series connected to said series resonant circuit and a base electrode coupled via a parallel connected resistor and capacitor to said series resonant circuit.
Claim 7
Dependent Claim
66 words
The linearity correction circuit of claim 1 including a DC supply coupled to said winding and to said switching means, said switching means being in the form of a transistor having emitter and collector electrodes series connected to said series resonant circuit and winding and a base electrode coupled by a resistor to said emitter and by a parallel coupled resistor and capacitor to said winding.
Claim 8
Dependent Claim
115 words
In a cathode ray tube deflection circuit having a horizontal flyback transformer means coupled to a parallel connected horizontal output stage and a horizontal deflection yoke and series connected intermediate a potential source and a potential reference level with a damper stage coupled to the junction of the transformer means and the parallel connected output stage and deflection yoke, the improvement comprising: a winding of said transformer means coupled to a potential reference level; and series connected switching means and a series resonant circuit coupling said winding to a potential reference level and connected to said damper stage to effect horizontal linearity correction of said current discharge of said deflection yoke into said damper stage.
Claim 9
Dependent Claim
115 words
In a cathode ray tube deflection circuit having a horizontal flyback transformer means coupled to a parallel connected horizontal output stage and a horizontal deflection yoke and series connected intermediate a potential source and a potential reference level with a damper stage coupled to the junction of the transformer means and the parallel connected output stage and deflection yoke, the improvement comprising: a winding of said transformer means coupled to a potential reference level; and series connected switching means and a series resonant circuit coupling said winding to a potential reference level and connected to said damper stage to effect horizontal linearity correction of said current discharge of said deflection yoke into said damper stage.
Claim 10
Dependent Claim
28 words
The improvement of claim 7 wherein said switching means is in the form of a diode and said series resonant circuit includes a capacitor and an adjustable inductor.
Claim 11
Dependent Claim
23 words
The improvement of claim 7 wherein said series resonant circuit includes a capacitor coupled intermediate said damper stage and a potential reference level.
Claim 12
Dependent Claim
22 words
The improvement of claim 7 including a DC supply coupling said winding to said series connected switching means and series resonant circuit.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |