Convergence optimization in a projection display

Details Convergence optimization in a projection display Convergence optimization in a projection display

2006-04-25

2006-04-25

Kostak, Victor R. (Department: 2614)

Television

Video display

Cathode-ray tube

C348S745000, C315S368180

Reexamination Certificate

active

07034901

ABSTRACT:
A projection display comprises three cathode ray tubes each having a deflection yoke and convergence yoke and each tube generating a raster for projection. One of the three cathode ray tubes has the convergence yoke coupled for current flow in a direction opposite to that of the other two convergence yokes. An amplifier is respectively coupled to each convergence yoke for convergence correction of each raster. A convergence circuit supplies correction signal values that are coupled to each respective amplifier such that convergence correction by the other two convergence yokes is responsive to a difference between the correction signal value coupled to the one convergence yoke and the correction signal values coupled to the other two convergence yokes.

REFERENCES:
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patent: 4961030 (1990-10-01), Ogino et al.
patent: 5798668 (1998-08-01), George
patent: 743 797 (1996-11-01), None
patent: 932 310 (1999-07-01), None
Search Report, Copy of International Search Report attached.

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