Cathode ray tube dynamic electron-optic eyebrow effect distortio

Details Cathode ray tube dynamic electron-optic eyebrow effect distortio Cathode ray tube dynamic electron-optic eyebrow effect distortio

1992-10-13

1993-09-28

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

31536828, H01J 2970, H01J 2976

Patent

active

052489205

ABSTRACT:
In a color CRT with an in-line gun and a pin cushion correcting yoke, there is disclosed an eyebrow effect electronoptical distortion correction device comprising two pair of coils, each pair having a coil on each outer electron beam side of the neck in the plane of the beams. The coil pairs are spaced apart along the Z-axis between the gun and the yoke and are driven by a sawtooth current having a bow-tie envelope synchronous with the raster scan to correct the dynamic, antisymmetrical eyebrow effect apparent as a purity defect on the raster.

REFERENCES:
patent: 4547707 (1985-10-01), Yabase
patent: 4689525 (1987-08-01), Shimoma et al.
patent: 5117151 (1992-05-01), Sluyterman et al.

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