Cathodoluminescent light sources and electric lighting arrangeme

Details Cathodoluminescent light sources and electric lighting arrangeme Cathodoluminescent light sources and electric lighting arrangeme

1981-02-06

1982-09-28

La Roche, Eugene R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

313293, 313396, 313448, 313495, 315 58, 315205, 315349, H05B 4300, H01J 6306

Patent

active

043520430

ABSTRACT:
A cathodoluminescent lamp for use for general lighting service includes an anode constituted by an electrically conducting coating, which may be partly internally reflective, on the interior surface of the bulb wall, a phosphor coating over the whole of the bulb wall interior, a dome-shaped metal mesh grid located near the junction of the bulb with the envelope neck and supported on a hollow metal cylinder, and an electron emissive cathode mounted within the grid/cylinder assembly. The cathode may be a "wreath" filament or indirectly heated disc located near the grid, or a linear filament located near the open end of the cylinder remote from the grid. In the latter case a metal disc, connected to the negative lead to the cathode, is located near the open end of the cylinder, to repel electrons emerging therefrom. A circuit, which may be incorporated in the lampholder, converts the supply to unidirectional operating voltages applied to the anode, grid and cathode.

REFERENCES:
patent: 2907909 (1959-10-01), Kazuk
patent: 3299305 (1967-01-01), Kreuder
patent: 3377492 (1968-04-01), Oess
patent: 3746909 (1973-07-01), Runtzel et al.
patent: 3917968 (1975-11-01), Di Benedetto et al.

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