Convergence displacement correcting device for projection-type i

Details Convergence displacement correcting device for projection-type i Convergence displacement correcting device for projection-type i

1994-04-26

1995-12-05

Groody, James J.

Television

Video display

Projection device

348778, 348806, 31536824, H04N 323

Patent

active

054733910

ABSTRACT:
A projection-type image display apparatus, in which a correction raster shape correction circuit is supplied with a sawtoothed-shaped voltage changing in level in accordance with a static convergence regulation voltage for correcting respective raster shapes displayed on the respective picture planes of a plurality of cathode-ray tubes, so that the convergence is not displaced at the peripheral portions of the picture screen at the time of regulating the static convergence.

REFERENCES:
patent: 4961030 (1990-10-01), Ogino
patent: 5164639 (1992-11-01), Shimaoka

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