Patent US4551655A successfully refreshed from Google Patents.
US4551655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television line deflection circuit
Assignee: US Philips Corp
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Filing: 1982-11-01
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Granted: 1985-11-05
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Expires: 2002-11-01
Abstract
Abstract A television line deflection circuit for recording or display, comprising a main and an auxiliary deflection signal generator. The main deflection signal generator applies a line-periodic, pulse-shaped voltage to a series arrangement of a deflection coil and a transformer winding. Of a further transformer winding a first terminal is connected to an auxiliary deflection signal generator terminal carrying a varying voltage and a second terminal is connected via a diode to a terminal carrying a reference voltage. A capacitor may be provided in parallel with the diode. An auxiliary deflection voltage which varies in a desired manner results in the desired scan, it being possible to employ for linearity correction a voltage which varies step-wise at intervals during line scanning periods and is, for example, generated by a microprocessor.
Inventors
- 👤 Franciscus W. A. Timmermans
- 👤 Frederik J. Van Roessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:48
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/23; H04N3/233; H04N23/00; H04N23/10; H04N23/13; H04N23/15
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A television line deflection circuit for deflecting an electron beam comprising: a main deflection signal generator for supplying a line periodic pulse shaped voltage to a deflection coil; a transformer having a first and a second winding; a deflection coil; said main deflection signal generator, transformer first winding, and deflection coil connected to form a series circuit; and an auxiliary deflection signal generator means for producing an auxiliary deflection current, having an amplifier circuit connected to a first end of said second winding to supply a line deflection correcting signal, and a second end of said second winding connected through a diode to a common terminal of said auxiliary deflection signal generator; whereby said auxiliary deflection circuit in response to an input signal which changes level in steps, supplies a stepwise change in current in said deflection coil, correcting the linearity of line deflection of said electron beam.
Claim 2
Dependent Claim
148 words
A television line deflection circuit for deflecting an electron beam comprising: a main deflection signal generator for supplying a line periodic pulse shaped voltage to a deflection coil; a transformer having a first and a second winding; a deflection coil; said main deflection signal generator, transformer first winding, and deflection coil connected to form a series circuit; and an auxiliary deflection signal generator means for producing an auxiliary deflection current, having an amplifier circuit connected to a first end of said second winding to supply a line deflection correcting signal, and a second end of said second winding connected through a diode to a common terminal of said auxiliary deflection signal generator; whereby said auxiliary deflection circuit in response to an input signal which changes level in steps, supplies a stepwise change in current in said deflection coil, correcting the linearity of line deflection of said electron beam.
Claim 3
Dependent Claim
20 words
A television line deflection circuit as claimed in claim 1, further comprising a capacitor connected in parallel with the diode.
Claim 4
Dependent Claim
42 words
A television line deflection circuit as claimed in claim 1 or claim 2, wherein the auxiliary deflection signal generator means is connected to a microprocessor, an output terminal of which is coupled to the auxiliary deflection signal generator amplifier circuit input terminal.
Claim 5
Dependent Claim
40 words
A television line deflection circuit as claimed in claim 1 or 2, wherein the auxiliary deflection signal generator means provides a deflection voltage, which varies step-wise at intervals during line scanning periods, to the first end of said second winding.
Claim 6
Dependent Claim
35 words
A television line deflection circuit as claimed in claim 1 or 2 wherein the amplifier circuit in the auxiliary deflection signal generator comprises a feedback amplifier, a biased diode being incorporated in the feedback path.
Claim 7
Dependent Claim
38 words
A television line deflection circuit as claimed in claim 3 wherein the auxiliary deflection signal generator means provides a deflection voltage, which varies step-wise at intervals during line scanning periods, to the first end of said second winding.
Claim 8
Dependent Claim
32 words
A television line deflection circuit as claimed in claim 3, wherein the amplifier circuit in the auxiliary deflection signal generator comprises a feedback amplifier, biased diode being incorporated in the feedback path.
Claim 9
Dependent Claim
33 words
A television line deflection circuit as claimed in claim 4, wherein the amplifier circuit in the auxiliary deflection signal generator comprises a feedback amplifier, a biased diode being incorporated in the feedback path.
Claim 10
Dependent Claim
69 words
A television line deflection circuit as claimed in claim 1 or 2, wherein the auxiliary deflection signal generator means provides a deflection voltage, which varies step-wise at intervals during line scanning periods, to the first end of said second winding; and the auxiliary deflection signal generator means is connected to a microprocessor, an output terminal of which is coupled to the auxiliary deflection signal generator amplifier circuit input terminal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |