Projection display apparatus

Details Projection display apparatus Projection display apparatus

1994-06-17

1996-09-10

Harvey, David E.

Television

Video display

Projection device

348747, H04N 931

Patent

active

055550347

ABSTRACT:
A projection display apparatus having three projection tubes for the projection of images of different primary colors wherein the images from the projection tubes are projected on an enlarged scale onto a screen through projection lenses. The display apparatus includes a first deflection unit having at least a first deflection coil mounted on a neck portion of a first projection tube, a second deflection unit having at least a second deflection coil mounted on a neck portion of a second projection tube and a third deflection unit having at least a third deflection coil mounted on a neck portion of a third projection tube. According to a feature of the display apparatus, a first linearity correction coil is coupled in series with a parallel connection of the second deflection unit and only one of the first and third deflection units.

REFERENCES:
patent: 3015691 (1962-01-01), Poorter

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