Cathode ray tube having an electron gun

Details Cathode ray tube having an electron gun Cathode ray tube having an electron gun

2007-12-25

2007-12-25

Roy, Sikha (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

C313S414000, C313S441000, C313S446000, C313S447000, C315S015000, C315S382000

Reexamination Certificate

active

10938671

ABSTRACT:
A cathode ray tube has an electron gun oriented along an axis (Z), comprising a quadrupolar device which comprises three electrodes (5, 6, 7). Each electrode possesses a central aperture, a right lateral aperture and a left lateral aperture all three substantially rectangular. The centers (c5.1, c7.1) of the central apertures of the three electrodes are aligned along the axis (Z) of the gun. The centers (c6.1,c6.3) of the left and right lateral apertures of the second electrode (6) are situated along respectively a first axis (z1) and a second axis (z3) that are parallel to the axis (Z) of the gun. The centers (c5.1, c7.1) of the left and right lateral apertures (5.1, 5.3, 7.1, 7.3) of the first and/or of the third electrode (5,7) are offset with respect to the axes (z1, z3) passing through the centers of the apertures of the second electrode. Such an arrangement makes it possible to correct the MODEC defects.

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