Post-deflection focusing method

Details Post-deflection focusing method Post-deflection focusing method

H - Electricity

01

J

316/14

H01J 9/14 (2006.01) H01J 9/18 (2006.01) H01J 29/81 (2006.01)

Patent

CA 1071298

ABSTRACT: A method of manufacturing a colour display tube of the refocusing type in which supports of insula- tion material are secured against the apertured metal plate, which supports, at least on the side remote from the plate, are provided with a conductor so that the plate constitutes a first set of lens electrodes and the conductors constitute a second set of lens electrodes, which lens electrodes together form a quadrupole lens in each aperture in the metal plate when a voltage dif- ference is applied between the first set and the second set. The defocusing direction of the quadrupole lens is parallel to the phosphor strips of the display screen. - 21 -

269548

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