Cathode ray tube control apparatus

Details Cathode ray tube control apparatus Cathode ray tube control apparatus

1993-02-22

1995-05-09

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 10, 313471, G09G 104, H01J 3126, H01J 2910

Patent

active

054143306

ABSTRACT:
A cathode ray tube control apparatus includes phosphor display screen, three electron guns for emitting R, G, B electron beams to the display screen, a shadow mask placed between the electron guns and the display screen, and index phosphors deposited on the shadow mask and having at least two line elements diagonal to a horizontal scanning direction of the electron beam for generating a signal according to the electron beam scan. Further provided are detector for detecting beam crossing points over the index phosphor, and correction circuit for correcting the deflection of the electron beam based on the detected beam crossing points.

REFERENCES:
patent: 4414571 (1983-11-01), Kureha et al.
patent: 4456853 (1984-06-01), Robinder et al.
patent: 4617495 (1986-10-01), Cutler
patent: 4857998 (1989-08-01), Tsujihara et al.
patent: 5111284 (1992-05-01), Tsujihara et al.

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