Electric lamp and discharge devices: systems – Cathode ray tube circuits – Power supply from deflection circuit source
Patent
1992-03-25
1994-02-01
Issing, Gregory C.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Power supply from deflection circuit source
315387, 348730, H01J 2970, G09G 104, H04N 563
Patent
active
052835057
ABSTRACT:
An auto scan horizontal deflection apparatus comprising a voltage detecting circuit as an amplitude detecting winding arranged at a secondary side of a choke transformer and detects amplitude of a flyback pulse. A frequency discriminating circuit (frequency/voltage converting circuit) discriminates frequency of horizontal synchronizing signal, and a control signal generating circuit (adding circuit) generates a control signal controlling the power source voltage of a variable power circuit supplying a power source voltage to a horizontal output circuit through a primary winding of the choke transformer on the basis of the outputs of both circuits. It becomes possible for the apparatus to keep horizontal deflection width constant regardless of the horizontal deflection frequency without using a conventionally-used detection resistance whose electric power loss is large, thereby decreasing electric power loss and keeping the horizontal amplitude almost constant even when the horizontal deflection frequency is changed.
REFERENCES:
patent: 4574224 (1986-03-01), Nowaczyk
patent: 4677350 (1987-06-01), Wharton et al.
patent: 4679211 (1987-07-01), Kurz
patent: 4789811 (1988-12-01), Hulshof
patent: 4829414 (1989-05-01), Yook
patent: 4900988 (1990-02-01), Yuk
patent: 4958110 (1990-09-01), Hayase
patent: 5023523 (1991-06-01), Tomita
Patent Abstracts of Japan, vol. 11, No. 346, (JP 62-126775), Nov. 1987.
Issing Gregory C.
Mitsubishi Denki & Kabushiki Kaisha
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