Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1995-10-18
1997-09-02
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
348806, 348626, H01Q 322, H01Q 324, H01Q 326
Patent
active
056636156
ABSTRACT:
A reciprocative deflection type CRT display apparatus includes a reciprocative horizontal deflection circuit formed by a horizontal deflecting direction change-over circuit, a 1/2-frequency divider, a horizontal deflecting coil and an S-like distortion correcting capacitor. The horizontal deflecting direction changeover circuit connects one end of the horizontal deflecting coil to a power source and the ground alternatively upon every horizontal scanning period, whereby horizontal deflection is alternately changed over between forward and backward directions without need for generating a flyback pulse of large amplitude. Power loss involved in operation of a horizontal output switching element constituting the horizontal deflection switching circuit is reduced to about 1/10 or less when compared with the conventional CRT.
REFERENCES:
patent: 2717329 (1955-09-01), Jones et al.
patent: 2817787 (1957-12-01), Kovasznay
patent: 3662102 (1972-05-01), Herndon
patent: 4638308 (1987-01-01), Kuwabara et al.
patent: 4926098 (1990-05-01), Tarrillo
patent: 5349274 (1994-09-01), Watanabe et al.
Blum Theodore M.
Hitachi , Ltd.
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