Cathode ray tube

Details Cathode ray tube Cathode ray tube

1989-11-02

1991-12-31

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 59, 313414, 313447, H01J 2946

Patent

active

050774972

ABSTRACT:
A cathode ray tube having an electron gun assembly in which a plurality of electrodes constitute an electron beam generating unit for generating electron beams, and an electron lens unit for focusing the generated beams on a predetermined location on a phosphor screen. The electron gun assembly further contains a pair of insulating support rods for supporting the electrodes, a resistor unit for applying a voltage to at least one of the electrodes. A metal ring is mounted in contact with a predetermined electrode of the electron lens unit and surrounds the insulating support rods. Terminal voltage pickup terminals apply a voltage to the resistor unit. At least a first and second intermediate voltage pickup terminal supply a voltage from the resistor unit to a first and second electrode. The first and second intermediate voltage pickup terminals are located in relation to the metal ring such that a discharge is prevented and image quality is preserved.

REFERENCES:
patent: 3932786 (1976-01-01), Campbell
patent: 4531075 (1985-07-01), Stone
patent: 4647815 (1987-03-01), Ishikawa et al.
patent: 4672269 (1987-06-01), Kamohara
patent: 4935663 (1990-11-01), Shimoma et al.
Kazuyoshi Ichimura, "Cathode Ray Tube" Patent Abstracts of Japan, Jul. 24, 1982.

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