US3819979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage regulators
Assignee: Lanteris Space LLC
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Filing: 1973-05-10
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Granted: 1974-06-25
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Expires: 1993-05-10
Abstract
Abstract A television scan horizontal deflection circuit of the solid state switch variety also provides for the generation of high voltage to operate the display tube. A regulator circuit, connected into the deflection circuit, serves to regulate the high voltage in terms of low voltage power supply variations, such as would result from ordinary power line varitions. When pincushion correction signals are applied to such a circuit the high voltage value tends to vary as a function of the pincushion currents. This introduces raster distortions resulting from capacitive lag in the high voltage power supply. In an improved circuit, the regulator function is established so that it senses the magnitude of the high voltage power supply input pulses thereby maintaining the high voltage constant and avoiding the above-mentioned raster distortions. By incorporating a partial sensing of the deflection into the regulator, good response to changing power supply voltage is also achieved.
Inventors
- 👤 W Truskalo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:13
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/18; H04N3/185; H04N3/1856
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
In a magnetically deflected cathode-ray-tube television type display employing a switch-type of horizontal deflection current generator; said generator including bi-dirEctionally conductive trace and commutator switches, means connected to said switches for so controlling the conduction intervals of said switches that a horizontal deflection current waveform is generated, electronic regulator means connected to said switches for controlling the magnitude of said current waveform; a high voltage rectifier to provide high voltages necessary for cathode-ray tube operation; means, including at least a transformer, coupled to said generator for supplying pulses to energize said rectifier; and means connected to said generator circuit for modifying said deflection current waveform to provide for pincushion distortion correction; the improvement comprising: connecting the input circuit of said regulator to a source of potential generated from a combination of a first control potential produced by said means that energizes said high voltage rectifier and a second control potential having a magnitude that is proportional to the amplitude of said deflection current wave.
Claim 2
Dependent Claim
164 words
In a magnetically deflected cathode-ray-tube television type display employing a switch-type of horizontal deflection current generator; said generator including bi-dirEctionally conductive trace and commutator switches, means connected to said switches for so controlling the conduction intervals of said switches that a horizontal deflection current waveform is generated, electronic regulator means connected to said switches for controlling the magnitude of said current waveform; a high voltage rectifier to provide high voltages necessary for cathode-ray tube operation; means, including at least a transformer, coupled to said generator for supplying pulses to energize said rectifier; and means connected to said generator circuit for modifying said deflection current waveform to provide for pincushion distortion correction; the improvement comprising: connecting the input circuit of said regulator to a source of potential generated from a combination of a first control potential produced by said means that energizes said high voltage rectifier and a second control potential having a magnitude that is proportional to the amplitude of said deflection current wave.
Claim 3
Dependent Claim
25 words
The improvement of claim 1 wherein said source of potential supplies a rectified and partly filtered pulse obtained from a winding on said pulse transformer.
Claim 4
Dependent Claim
48 words
The improvement of claim 2 wherein said second control potential is the potential developed across a capacitor connected to said transformer and having a value that will, in conjunction with said transformer, result in integrator action to produce a potential proportional to the integrated value of deflection current.
Claim 5
Dependent Claim
154 words
A magnetically deflected cathode ray tube television type display having a combined high voltage source and horizontal deflection current generator comprising: a low-voltage power supply for energizing said generator, bi-directionally conducting trace and retrace switches connected to control the flow of energy from said supply, a horizontal deflection coil mounted on said tube and coupled to said switches, means for controlling the conduction interval of said switches to provide the desired flow of current in said deflection coil, a pulse transformer coupled to said switches and arranged to provide a high voltage pulse that can be rectified to supply the high voltage requirements of said tube, an electronic regulator connected to control the transfer of energy from said low voltage power supply to said deflection coil, and means for controlling said regulator in response to a combination of the signal from said pulse transformer and a signal obtained by integrating the deflection current wave.
Claim 6
Dependent Claim
154 words
A magnetically deflected cathode ray tube television type display having a combined high voltage source and horizontal deflection current generator comprising: a low-voltage power supply for energizing said generator, bi-directionally conducting trace and retrace switches connected to control the flow of energy from said supply, a horizontal deflection coil mounted on said tube and coupled to said switches, means for controlling the conduction interval of said switches to provide the desired flow of current in said deflection coil, a pulse transformer coupled to said switches and arranged to provide a high voltage pulse that can be rectified to supply the high voltage requirements of said tube, an electronic regulator connected to control the transfer of energy from said low voltage power supply to said deflection coil, and means for controlling said regulator in response to a combination of the signal from said pulse transformer and a signal obtained by integrating the deflection current wave.
Claim 7
Dependent Claim
15 words
The generator of claim 4 wherein said pulse transformer signal is rectified and partially filtered.
Claim 8
Dependent Claim
23 words
The generator of claim 5 wherein the integrated deflection current wave is obtained from a capacitor connected in series with said pulse transformer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |