Color cathode ray tube having an internal voltage divider

Details Color cathode ray tube having an internal voltage divider Color cathode ray tube having an internal voltage divider

1998-06-17

2000-10-17

Patel, Vip

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313412, 313457, 315 3, H01J 2950

Patent

active

061336831

ABSTRACT:
A color cathode ray tube includes an evacuated envelope having a panel portion with a phosphor screen formed on an inner surface thereof, a neck portion, and a funnel portion connecting the panel portion and the neck portion, and an electron gun housed in the neck portion. The electron gun has a cathode and a plurality of focus grid electrodes including grid electrodes for forming a multistage focus lens for focusing an electron beam emitted from the cathode. The cathode and the focus grid electrodes are fixed in predetermined axially spaced relationship by a pair of bead glass. The electron gun is provided with a voltage divider for producing at least one voltage other than a voltage supplied from outside the evacuated envelope, the voltage divider is made of at least one resistor and is fabricated as a separate element from the bead glass, and at least one of bead glass is provided with a recess for receiving the voltage divider in a surface thereof on a side thereof facing away from the cathode and the focus grid electrodes.

REFERENCES:
patent: 5077497 (1991-12-01), Kamohara et al.

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