Deflection device for projection tube and projection tube...

Details Deflection device for projection tube and projection tube... Deflection device for projection tube and projection tube...

2007-06-05

2007-06-05

Vu, David (Department: 2821)

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

C315S370000

Reexamination Certificate

active

11057623

ABSTRACT:
A deflection device for a projection tube includes a main deflection device for generating a raster and an auxiliary deflection device for correcting a convergence. The auxiliary deflection device includes a toroidal auxiliary horizontal coil, a saddle-type auxiliary vertical coil, and a ferrite core. According to this configuration, the deflection efficiency is enhanced, and pincushion distortion in upper and lower portions can be corrected efficiently while a change in the shape of a beam spot is reduced.

REFERENCES:
patent: 3735193 (1973-05-01), Ikeuchi
patent: 2002-330446 (2002-11-01), None

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