Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1997-05-08
1999-08-17
Westin, Edward P.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315370, 315400, 315411, H04N 323, H04N 3185, G09G 100, G09G 104
Patent
active
059398442
ABSTRACT:
A high-frequency horizontal deflection/high-voltage generation apparatus capable of setting inductance of a deflecting yoke without being affected by a collector voltage of a horizontal switching transistor and suppressing power loss while increasing a deflecting pulse voltage so that amplitude adjustment and side-pin correction can be effectuated without incurring any appreciable power loss. A voltage which is higher than the collector voltage V.sub.CP of the switching transistor is applied to the deflecting yoke. A resonant circuit is provided for applying to the deflecting yoke a voltage pulse of positive polarity and that of negative polarity, i.e., the voltage pulses bearing opposite phase relation to each other, for increasing equivalently the voltage applied across the deflecting yoke. The switching waveform outputted from the resonant circuit is synchronized with a switching operation of a high-speed switching element driven by a voltage induced in a winding of the deflecting transformer. By adjusting the timing of the synchronous switching operation, a crest value of the voltage pulse of negative polarity is changed, whereby amplitude adjustment and side-pin phenomenon correcting operation are realized. For ensuring stability of a high voltage, the primary winding of the deflecting transformer and that of the high-voltage generating transformer are wound around two legs, respectively, of a U-shaped core. Stabilization of the high voltage is realized by adjusting the power source voltage for the resonant circuit.
REFERENCES:
patent: 4146823 (1979-03-01), Dietz
patent: 4329729 (1982-05-01), Knight
patent: 4625155 (1986-11-01), Dietz
patent: 5283505 (1994-02-01), Bando
patent: 5644198 (1997-07-01), Park
Nagasue Takafumi
Sakaue Yutaka
Shiomi Katsuhiko
Frank Robert J.
Gardner Shane R.
Matsushita Electric - Industrial Co., Ltd.
Westin Edward P.
LandOfFree
High-frequency horizontal deflection/high-voltage generation app does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High-frequency horizontal deflection/high-voltage generation app, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-frequency horizontal deflection/high-voltage generation app will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-317718