Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1996-04-24
1997-01-21
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2956
Patent
active
055962505
ABSTRACT:
A video display apparatus has a controllable, synchronized switch to control current conduction in an inductance. Responsive to a switching signal, a modulator switches the conductive states of the controllable switch. A signal generator is coupled to a source of retrace pulses, for generating at an output a horizontal rate sawtooth signal. The sawtooth signal comprising a first ramp of duration within the first half of the retrace pulse and a second ramp of duration equal to the trace interval. A source of a modulation signal is coupled to a means for generating the switching signal. Responsive to the modulation and sawtooth signals the means generates the switching signal having a first polarity which inhibits conduction in the switch and a second polarity which enables conduction in the switch. The first polarity of switching signal commences within the first half of the retrace interval and the second polarity commences within the remaining time of the horizontal interval.
REFERENCES:
patent: 3689797 (1972-09-01), Hetterscheid et al.
patent: 4216392 (1980-08-01), Valkestija
patent: 4225809 (1980-09-01), Owaga et al.
patent: 4362974 (1982-12-01), Deitz
patent: 4516168 (1985-05-01), Hicks
patent: 4625154 (1986-11-01), Willis
patent: 4965496 (1990-10-01), Haferl
patent: 5043637 (1991-08-01), Gries et al.
patent: 5323092 (1994-06-01), Helfrich et al.
Copy of EPO search report, 3 pages dated Oct. 12, 1995.
Data Sheet TDA 8145 E/W Correction IC, pp. 721-725, Jul. 1991.
Application note TEA2164 pp. 7,8. Jan. 1988.
SMPS Demonstration Board Notes, pp. 5, 6 Mar. 1988.
Data Sheet TDA 4950 E/W Correction IC, pp. 611-615, Jul. 1991.
Imperial 990 TV Receiver 1993 model partial deflection schematic and 2 sheets oscilloscope waveforms.
Blum Theodore M.
Davenport Francis A.
Laks Joseph J.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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