Deflecting yoke for use in picture tube of projection color tele

Details Deflecting yoke for use in picture tube of projection color tele Deflecting yoke for use in picture tube of projection color tele

1982-03-10

1983-12-13

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335210, 313421, H01F 500

Patent

active

044207344

ABSTRACT:
A projection color television receiver set comprises three picture tubes juxtaposed to one another and producing red, green and blue light images which are projected through respective lenses onto a single screen to be reproduced as a single synthesized color picture. In order that rectangular rasters produced by the picture tubes disposed at both sides of the center picture tube are prevented from being deformed into trapezoidal rasters when projected on the screen, deflecting yokes used in the lateral picture tubes are provided with horizontal deflection winding in such arrangement that trapezoidal rasters are produced on faceplates of the laterally disposed picture tubes, respectively, which rasters are projected in a rectangular form on the single screen in alignment with the rectangular raster produced and projected from the center picture tube, whereby a color picture of an improved quality is reproduced on the screen, involving substantially no misconvergence. Auxiliary deflecting yokes and associated electric circuit of complicated configuration required heretofore to this end are spared.

REFERENCES:
patent: 2793311 (1957-05-01), Thomas
patent: 3735193 (1973-05-01), Ikeuchi

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