Patent US3700959A successfully refreshed from Google Patents.
US3700959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal deflection circuits for television receivers
Assignee: Denki Onkyo Co Ltd
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Filing: 1970-09-23
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Granted: 1972-10-24
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Expires: 1990-09-23
Abstract
Abstract In a television receiver comprising a high voltage generating apparatus including a piezoelectric transducer, a pulse transformer having a primary winding responsive to the deflection current and a secondary winding and means to energize the piezoelectric transducer by a pulse voltage supplied to the primary winding at the time of blanking, there is provided a horizontal deflection circuit comprising a parallel resonance circuit comprised by the secondary winding of the pulse transformer and a capacitor for producing a third harmonic voltage wave of the blanking frequency of the horizontal oscillation signal, said third harmonic voltage wave acting to decrease the peak value of the pulse voltage.
Inventors
- 👤 Yasunobu Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:37
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/12; H04N5/123; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
For use in a television receiver comprising a high voltage generating apparatus including a piezoelectric transducer; a pulse transformer having a primary winding responsive to the deflection current and a secondary winding electromagnetically coupled with said primary winding; and means to energize said piezoelectric transducer by a pulse voltage supplied to said primary winding at the time of blanking, a horizontal deflection circuit comprising a parallel resonance circuit for producing a third harmonic voltage wave of the blanking frequency of the horizontal oscillation signal, said third harmonic voltage wave acting to decrease the peak value of said pulse voltage and said parallel resonance circuit being comprised by said secondary winding of said pulse transformer and a capacitor connected in parallel with said secondary winding.
Claim 2
Dependent Claim
124 words
For use in a television receiver comprising a high voltage generating apparatus including a piezoelectric transducer; a pulse transformer having a primary winding responsive to the deflection current and a secondary winding electromagnetically coupled with said primary winding; and means to energize said piezoelectric transducer by a pulse voltage supplied to said primary winding at the time of blanking, a horizontal deflection circuit comprising a parallel resonance circuit for producing a third harmonic voltage wave of the blanking frequency of the horizontal oscillation signal, said third harmonic voltage wave acting to decrease the peak value of said pulse voltage and said parallel resonance circuit being comprised by said secondary winding of said pulse transformer and a capacitor connected in parallel with said secondary winding.
Claim 3
Dependent Claim
39 words
The horizontal deflection circuit according to claim 1 wherein said primary winding of said pulse transformer is connected to the output side of a switching transistor which controls the current flowing through the deflection coil of said television receiver.
Claim 4
Dependent Claim
27 words
The horizontal deflectIon circuit according to claim 1 wherein said secondary winding of said pulse transformer is connected to focusing and video circuits of said television receiver.
Claim 5
Dependent Claim
32 words
The horizontal deflection circuit according to claim 1 wherein a series resonance circuit is connected to said primary winding of said pulse transformer for producing a driving voltage for said piezoelectric transducer.
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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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |