Cathode-ray tube and semiconductor device for use in such a cath

Details Cathode-ray tube and semiconductor device for use in such a cath Cathode-ray tube and semiconductor device for use in such a cath

1985-03-19

1986-03-04

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313446, 313390, H01J 2904

Patent

active

045742162

ABSTRACT:
A semiconductor cathode is provided with deflection electrodes, with which a dipole field can be generated. As a result of this, electrons released at the surface of the semiconductor cathode leave the surface at a certain angle. For use inter alia in camera tubes, display tubes, such an inclined beam can be aligned without any problems. Positive ions which are released inter alia from residual gases and are accelerated in the direction of the cathode impinge on the cathode at an acute angle. As a result of this, the active part of the cathode is substantially not attacked by said positive ions, so that degradation is prevented.

REFERENCES:
patent: 2835837 (1958-05-01), Bas-Taymas
patent: 4160188 (1979-07-01), Butterwick
patent: 4303930 (1981-12-01), van Gorkom et al.
patent: 4325084 (1982-04-01), van Gorkom et al.

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