Patent US3778670A successfully refreshed from Google Patents.
US3778670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal deflection circuit
Assignee: Sony Corp
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Filing: 1972-02-01
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Granted: 1973-12-11
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Expires: 1992-02-01
Abstract
Abstract A solid-state horizontal deflection circuit including a high voltage applying circuit for a television receiver or the like in which a gate-controlled switching device is used for applying a deflection current to a horizontal deflection coil to perform horizontal beam scanning and another semiconductor switching device is used for applying a pulse voltage to a flyback transformer to produce a high voltage supplied to a cathode ray tube, and further a couple of diodes connected in series are provided in connection with the above two switching devices. Both switching devices are turned on in response to a horizontal driving signal supplied to at least one of them and turned off by the recovery current of the series-connected diodes.
Inventors
- 👤 T Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:59
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/83; H03K4/48; H03K4/60; H03K4/62
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
208 words
A horizontal deflection circuit including a high voltage producing circuit comprising: A. A flyback transformer comprising a primary and a secondary; B. A semiconductor switching device having first, second and third electrodes, said first electrode being connected to said flyback transformer to induce a high voltage in said secondary and said semiconductor switching device passing a current flowing from said first electrode to said third electrode during conduction caused by a signal applied to said second electrode; C. A horizontal deflection coil; D. A first gate-controlled switching device having first, second and third electrodes, said first electrode being connected to said horizontal deflection coil and said gate-controlled switching device passing a current flowing from said first electrode to said second electrode during conduction caused by a signal applied to said second electrode; E. A driving signal source connected to the second electrode of said semiconductor switching device for applying a driving signal thereto; F. A series connection of first and second diodes connected with the same polarity, said series connection of the diodes being coupled with the third electrode of said semiconductor switching device; and G. Coupling means for coupling the second electrode of said gate-controlled switching device with the connection point between said first and second diodes.
Claim 2
Dependent Claim
208 words
A horizontal deflection circuit including a high voltage producing circuit comprising: A. A flyback transformer comprising a primary and a secondary; B. A semiconductor switching device having first, second and third electrodes, said first electrode being connected to said flyback transformer to induce a high voltage in said secondary and said semiconductor switching device passing a current flowing from said first electrode to said third electrode during conduction caused by a signal applied to said second electrode; C. A horizontal deflection coil; D. A first gate-controlled switching device having first, second and third electrodes, said first electrode being connected to said horizontal deflection coil and said gate-controlled switching device passing a current flowing from said first electrode to said second electrode during conduction caused by a signal applied to said second electrode; E. A driving signal source connected to the second electrode of said semiconductor switching device for applying a driving signal thereto; F. A series connection of first and second diodes connected with the same polarity, said series connection of the diodes being coupled with the third electrode of said semiconductor switching device; and G. Coupling means for coupling the second electrode of said gate-controlled switching device with the connection point between said first and second diodes.
Claim 3
Dependent Claim
21 words
A horizontal deflection circuit according to claim 1, in which the third electrode of said gate-controlled switching device is directly grounded.
Claim 4
Dependent Claim
42 words
A horizontal deflection circuit according to claim 1, comprising, in addition, a resistor, one end of said series connection of the diodes being connected to the third electrode of said semiconductor switching device and the other end being grounded through a resistor.
Claim 5
Dependent Claim
25 words
A horizontal deflection circuit according to claim 3, in which said coupling means comprises a capacitor and a resistor connected in parallel to each other.
Claim 6
Dependent Claim
35 words
A horizontal deflection circuit according to claim 4, in which said semiconductor switching device comprises a second gate-controlled switching device, the gate of said second gate-controlled switching device being connected to said driving signal source.
Claim 7
Dependent Claim
32 words
A horizontal deflection circuit according to claim 3, in which said semiconductor switching device comprises a transistor, the base and emitter electrodes of said transistor being connected to said driving signal source.
Claim 8
Dependent Claim
18 words
A horizontal deflection circuit according to claim 1, in which said coupling means comprises an additional signal source.
Claim 9
Dependent Claim
32 words
A horizontal deflection circuit according to claim 7, in which said coupling means further comprises a parallel connection of a capacitor and a resistor coupled in series with said additional signal source.
Claim 10
Dependent Claim
27 words
A horizontal deflection circuit according to claim 8, in which said driving signal source and additional signal source comprise a driving transformer having a plurality of windings.
Claim 11
Dependent Claim
19 words
A horizontal deflection circuit according to claim 9, in which said semiconductor switching device comprises another gate-controlled switching device.
Claim 12
Dependent Claim
30 words
A horizontal deflection circuit according to claim 9, in which said semiconductor switching device comprises a transistor having an additional current path provided between the base and emitter electrodes thereof.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |