US4958110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television receiver
Assignee: Panasonic Holdings Corp
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Filing: 1990-01-25
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Granted: 1990-09-18
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Expires: 2010-01-25
Abstract
Abstract A television receiver in which a high voltage detection circuit detects the FBT output voltage which is supplied to the cathode ray tube, a comparison circuit compares the detected voltage with a reference voltage, and the supply voltage to the FBT is controlled by a control signal which represents the result of comparison. The control signal provided by the comparison circuit is also used to control the supply voltage to a drive circuit which injects base carriers to a high voltage generating transistor, so that a proper drive control takes place automatically depending on the load condition of the high voltage.
Inventors
- 👤 Akihiko Hayase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:41
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/18; H04N3/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A television receiver comprising: a fly-back transformer for supplying a high voltage to a cathode ray tube; a circuit for detecting a high voltage produced by said fly-back transformer; a comparison circuit for comparing the voltage detected by said high voltage detection circuit with a reference voltage; a voltage control circuit for controlling the magnitude of a voltage supplied to said fly-back transformer in accordance with a control signal produced by said comparison circuit; an output circuit including an output transistor for driving said fly-back transformer to generate the high voltage; a drive circuit for driving said output circuit; and a voltage control circuit for controlling a supply voltage to said drive circuit in accordance with the control signal produced by said comparison circuit.
Claim 2
Dependent Claim
124 words
A television receiver comprising: a fly-back transformer for supplying a high voltage to a cathode ray tube; a circuit for detecting a high voltage produced by said fly-back transformer; a comparison circuit for comparing the voltage detected by said high voltage detection circuit with a reference voltage; a voltage control circuit for controlling the magnitude of a voltage supplied to said fly-back transformer in accordance with a control signal produced by said comparison circuit; an output circuit including an output transistor for driving said fly-back transformer to generate the high voltage; a drive circuit for driving said output circuit; and a voltage control circuit for controlling a supply voltage to said drive circuit in accordance with the control signal produced by said comparison circuit.
References Cited (Backward Citations)
US4823052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |