Cathode-ray tube with electric field correction lens for improve

Details Cathode-ray tube with electric field correction lens for improve Cathode-ray tube with electric field correction lens for improve

1994-05-31

1996-07-23

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313414, G09G 104, H01J 2950

Patent

active

055392857

ABSTRACT:
A cathode ray tube includes a sixth grid (G.sub.6), which is a final accelerating electrode, of first to sixth grids (G.sub.1 to G.sub.6) forming an electron gun and the sixth grid (1) is divided into three electrodes (G.sub.6a, G.sub.6b and G.sub.6c). Longitudinally oblong opening portions (9 and 11) are formed through the first and third electrodes (G.sub.6a and G.sub.6c), and a laterally oblong opening portion (10) is formed through the second electrode (G.sub.6b). A dynamic voltage is supplied to the electrode (G.sub.6b) through a neck capacitor (19) formed at a neck portion (2a) of the cathode-ray tube (2) to thereby form a quadrupole-lens electric field (7) for correction of deformation of a beamspot on the side of a deflection yoke relative to a main-lens electric field (8).

REFERENCES:
patent: Re34339 (1993-10-01), Osakabe
patent: 5055749 (1991-10-01), Chen et al.
patent: 5325013 (1994-06-01), Johnson et al.
patent: 5347202 (1994-09-01), Stil

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