Method for correcting the convergence in a projection television

Details Method for correcting the convergence in a projection television Method for correcting the convergence in a projection television

1998-02-03

2000-08-29

Lee, Michael H.

Television

Video display

Projection device

348747, 31536811, H04N 3223

Patent

active

061116165

ABSTRACT:
A set of coarse or initial convergence correction values for a model line of projection television receivers is defined in digital form prior to production using a fine grid or grating pattern. The set of coarse convergence correction values is digitally stored in all the receivers of the model line. A receiver-specific set of fine or final convergence correction values is defined in digital form for each receiver in the model line using a coarse grid or grating pattern. In each receiver, the receiver-specific set of fine or final convergence correction values is combined with the stored set of coarse convergence correction values. Convergence correction during subsequent operation of each receiver is based on the combined convergence correction values. Some of the coarse and fine convergence correction values can be located horizontally outside of the visible picture area of the receivers.

REFERENCES:
patent: 4672275 (1987-06-01), Ando
patent: 5016095 (1991-05-01), Kii
patent: 5550598 (1996-08-01), Itoh et al.
English language Abstract provided for each reference.

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